ssl_lib.c 98.6 KB
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/*
 * ! \file ssl/ssl_lib.c \brief Version independent SSL functions.
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 */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
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 *
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 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
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 *
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 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
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 *
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
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 * 4. If you include any Windows specific code (or a derivative thereof) from
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 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
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 *
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 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
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/* ====================================================================
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 * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
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 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
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/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
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 * ECC cipher suite support in OpenSSL originally developed by
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 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 */
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/* ====================================================================
 * Copyright 2005 Nokia. All rights reserved.
 *
 * The portions of the attached software ("Contribution") is developed by
 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 * license.
 *
 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 * support (see RFC 4279) to OpenSSL.
 *
 * No patent licenses or other rights except those expressly stated in
 * the OpenSSL open source license shall be deemed granted or received
 * expressly, by implication, estoppel, or otherwise.
 *
 * No assurances are provided by Nokia that the Contribution does not
 * infringe the patent or other intellectual property rights of any third
 * party or that the license provides you with all the necessary rights
 * to make use of the Contribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 * OTHERWISE.
 */
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#ifdef REF_CHECK
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# include <assert.h>
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#endif
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#include <stdio.h>
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#include "ssl_locl.h"
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#include <openssl/objects.h>
#include <openssl/lhash.h>
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#include <openssl/x509v3.h>
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#include <openssl/rand.h>
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#include <openssl/ocsp.h>
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#ifndef OPENSSL_NO_DH
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# include <openssl/dh.h>
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#endif
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#ifndef OPENSSL_NO_ENGINE
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# include <openssl/engine.h>
#endif
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#include <openssl/async.h>
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const char SSL_version_str[] = OPENSSL_VERSION_TEXT;
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SSL3_ENC_METHOD ssl3_undef_enc_method = {
    /*
     * evil casts, but these functions are only called if there's a library
     * bug
     */
    (int (*)(SSL *, int))ssl_undefined_function,
    (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
    ssl_undefined_function,
    (int (*)(SSL *, unsigned char *, unsigned char *, int))
        ssl_undefined_function,
    (int (*)(SSL *, int))ssl_undefined_function,
    (int (*)(SSL *, const char *, int, unsigned char *))
        ssl_undefined_function,
    0,                          /* finish_mac_length */
    (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
    NULL,                       /* client_finished_label */
    0,                          /* client_finished_label_len */
    NULL,                       /* server_finished_label */
    0,                          /* server_finished_label_len */
    (int (*)(int))ssl_undefined_function,
    (int (*)(SSL *, unsigned char *, size_t, const char *,
             size_t, const unsigned char *, size_t,
             int use_context))ssl_undefined_function,
};
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struct ssl_async_args {
    SSL *s;
    void *buf;
    int num;
};

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static void clear_ciphers(SSL *s)
{
    /* clear the current cipher */
    ssl_clear_cipher_ctx(s);
    ssl_clear_hash_ctx(&s->read_hash);
    ssl_clear_hash_ctx(&s->write_hash);
}

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int SSL_clear(SSL *s)
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{
    if (s->method == NULL) {
        SSLerr(SSL_F_SSL_CLEAR, SSL_R_NO_METHOD_SPECIFIED);
        return (0);
    }
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    if (ssl_clear_bad_session(s)) {
        SSL_SESSION_free(s->session);
        s->session = NULL;
    }
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    s->error = 0;
    s->hit = 0;
    s->shutdown = 0;
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    if (s->renegotiate) {
        SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR);
        return 0;
    }
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    ossl_statem_clear(s);
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    s->version = s->method->version;
    s->client_version = s->version;
    s->rwstate = SSL_NOTHING;
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    BUF_MEM_free(s->init_buf);
    s->init_buf = NULL;
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    clear_ciphers(s);
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    s->first_packet = 0;
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    /*
     * Check to see if we were changed into a different method, if so, revert
     * back if we are not doing session-id reuse.
     */
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    if (!ossl_statem_get_in_handshake(s) && (s->session == NULL)
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        && (s->method != s->ctx->method)) {
        s->method->ssl_free(s);
        s->method = s->ctx->method;
        if (!s->method->ssl_new(s))
            return (0);
    } else
        s->method->ssl_clear(s);
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    RECORD_LAYER_clear(&s->rlayer);
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    return (1);
}
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/** Used to change an SSL_CTXs default SSL method type */
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int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth)
{
    STACK_OF(SSL_CIPHER) *sk;

    ctx->method = meth;

    sk = ssl_create_cipher_list(ctx->method, &(ctx->cipher_list),
                                &(ctx->cipher_list_by_id),
                                SSL_DEFAULT_CIPHER_LIST, ctx->cert);
    if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) {
        SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,
               SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
        return (0);
    }
    return (1);
}
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SSL *SSL_new(SSL_CTX *ctx)
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{
    SSL *s;

    if (ctx == NULL) {
        SSLerr(SSL_F_SSL_NEW, SSL_R_NULL_SSL_CTX);
        return (NULL);
    }
    if (ctx->method == NULL) {
        SSLerr(SSL_F_SSL_NEW, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
        return (NULL);
    }

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    s = OPENSSL_zalloc(sizeof(*s));
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    if (s == NULL)
        goto err;

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    RECORD_LAYER_init(&s->rlayer, s);
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    s->options = ctx->options;
    s->mode = ctx->mode;
    s->max_cert_list = ctx->max_cert_list;
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    s->references = 1;
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    /*
     * Earlier library versions used to copy the pointer to the CERT, not
     * its contents; only when setting new parameters for the per-SSL
     * copy, ssl_cert_new would be called (and the direct reference to
     * the per-SSL_CTX settings would be lost, but those still were
     * indirectly accessed for various purposes, and for that reason they
     * used to be known as s->ctx->default_cert). Now we don't look at the
     * SSL_CTX's CERT after having duplicated it once.
     */
    s->cert = ssl_cert_dup(ctx->cert);
    if (s->cert == NULL)
        goto err;
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    RECORD_LAYER_set_read_ahead(&s->rlayer, ctx->read_ahead);
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    s->msg_callback = ctx->msg_callback;
    s->msg_callback_arg = ctx->msg_callback_arg;
    s->verify_mode = ctx->verify_mode;
    s->not_resumable_session_cb = ctx->not_resumable_session_cb;
    s->sid_ctx_length = ctx->sid_ctx_length;
    OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
    memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx));
    s->verify_callback = ctx->default_verify_callback;
    s->generate_session_id = ctx->generate_session_id;

    s->param = X509_VERIFY_PARAM_new();
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    if (s->param == NULL)
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        goto err;
    X509_VERIFY_PARAM_inherit(s->param, ctx->param);
    s->quiet_shutdown = ctx->quiet_shutdown;
    s->max_send_fragment = ctx->max_send_fragment;
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    CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
    s->ctx = ctx;
    s->tlsext_debug_cb = 0;
    s->tlsext_debug_arg = NULL;
    s->tlsext_ticket_expected = 0;
    s->tlsext_status_type = -1;
    s->tlsext_status_expected = 0;
    s->tlsext_ocsp_ids = NULL;
    s->tlsext_ocsp_exts = NULL;
    s->tlsext_ocsp_resp = NULL;
    s->tlsext_ocsp_resplen = -1;
    CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
    s->initial_ctx = ctx;
# ifndef OPENSSL_NO_EC
    if (ctx->tlsext_ecpointformatlist) {
        s->tlsext_ecpointformatlist =
            BUF_memdup(ctx->tlsext_ecpointformatlist,
                       ctx->tlsext_ecpointformatlist_length);
        if (!s->tlsext_ecpointformatlist)
            goto err;
        s->tlsext_ecpointformatlist_length =
            ctx->tlsext_ecpointformatlist_length;
    }
    if (ctx->tlsext_ellipticcurvelist) {
        s->tlsext_ellipticcurvelist =
            BUF_memdup(ctx->tlsext_ellipticcurvelist,
                       ctx->tlsext_ellipticcurvelist_length);
        if (!s->tlsext_ellipticcurvelist)
            goto err;
        s->tlsext_ellipticcurvelist_length =
            ctx->tlsext_ellipticcurvelist_length;
    }
# endif
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# ifndef OPENSSL_NO_NEXTPROTONEG
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    s->next_proto_negotiated = NULL;
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# endif
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    if (s->ctx->alpn_client_proto_list) {
        s->alpn_client_proto_list =
            OPENSSL_malloc(s->ctx->alpn_client_proto_list_len);
        if (s->alpn_client_proto_list == NULL)
            goto err;
        memcpy(s->alpn_client_proto_list, s->ctx->alpn_client_proto_list,
               s->ctx->alpn_client_proto_list_len);
        s->alpn_client_proto_list_len = s->ctx->alpn_client_proto_list_len;
    }
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    s->verify_result = X509_V_OK;
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    s->default_passwd_callback = ctx->default_passwd_callback;
    s->default_passwd_callback_userdata = ctx->default_passwd_callback_userdata;

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    s->method = ctx->method;
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    if (!s->method->ssl_new(s))
        goto err;
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    s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1;
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    if (!SSL_clear(s))
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        goto err;
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    CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
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#ifndef OPENSSL_NO_PSK
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    s->psk_client_callback = ctx->psk_client_callback;
    s->psk_server_callback = ctx->psk_server_callback;
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#endif

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    s->job = NULL;

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    return (s);
 err:
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    SSL_free(s);
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    SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
    return (NULL);
}
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int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx,
                                   unsigned int sid_ctx_len)
{
    if (sid_ctx_len > sizeof ctx->sid_ctx) {
        SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,
               SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
        return 0;
    }
    ctx->sid_ctx_length = sid_ctx_len;
    memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len);
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    return 1;
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}
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int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx,
                               unsigned int sid_ctx_len)
{
    if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
        SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,
               SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
        return 0;
    }
    ssl->sid_ctx_length = sid_ctx_len;
    memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len);
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    return 1;
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}
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int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
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{
    CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
    ctx->generate_session_id = cb;
    CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
    return 1;
}
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int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
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{
    CRYPTO_w_lock(CRYPTO_LOCK_SSL);
    ssl->generate_session_id = cb;
    CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
    return 1;
}
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int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
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                                unsigned int id_len)
{
    /*
     * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
     * we can "construct" a session to give us the desired check - ie. to
     * find if there's a session in the hash table that would conflict with
     * any new session built out of this id/id_len and the ssl_version in use
     * by this SSL.
     */
    SSL_SESSION r, *p;

    if (id_len > sizeof r.session_id)
        return 0;

    r.ssl_version = ssl->version;
    r.session_id_length = id_len;
    memcpy(r.session_id, id, id_len);

    CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
    p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
    CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
    return (p != NULL);
}
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int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
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{
    return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
}
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int SSL_set_purpose(SSL *s, int purpose)
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{
    return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
}
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int SSL_CTX_set_trust(SSL_CTX *s, int trust)
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{
    return X509_VERIFY_PARAM_set_trust(s->param, trust);
}
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int SSL_set_trust(SSL *s, int trust)
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{
    return X509_VERIFY_PARAM_set_trust(s->param, trust);
}
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int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
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{
    return X509_VERIFY_PARAM_set1(ctx->param, vpm);
}
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int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
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{
    return X509_VERIFY_PARAM_set1(ssl->param, vpm);
}
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X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
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{
    return ctx->param;
}
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X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
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{
    return ssl->param;
}
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void SSL_certs_clear(SSL *s)
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{
    ssl_cert_clear_certs(s->cert);
}
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void SSL_free(SSL *s)
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{
    int i;
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    if (s == NULL)
        return;
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    i = CRYPTO_add(&s->references, -1, CRYPTO_LOCK_SSL);
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#ifdef REF_PRINT
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    REF_PRINT("SSL", s);
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#endif
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    if (i > 0)
        return;
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#ifdef REF_CHECK
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    if (i < 0) {
        fprintf(stderr, "SSL_free, bad reference count\n");
        abort();                /* ok */
    }
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#endif
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    X509_VERIFY_PARAM_free(s->param);
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    CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);

    if (s->bbio != NULL) {
        /* If the buffering BIO is in place, pop it off */
        if (s->bbio == s->wbio) {
            s->wbio = BIO_pop(s->wbio);
        }
        BIO_free(s->bbio);
        s->bbio = NULL;
    }
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    BIO_free_all(s->rbio);
    if (s->wbio != s->rbio)
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        BIO_free_all(s->wbio);

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    BUF_MEM_free(s->init_buf);
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    /* add extra stuff */
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    sk_SSL_CIPHER_free(s->cipher_list);
    sk_SSL_CIPHER_free(s->cipher_list_by_id);
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    /* Make the next call work :-) */
    if (s->session != NULL) {
        ssl_clear_bad_session(s);
        SSL_SESSION_free(s->session);
    }

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    clear_ciphers(s);
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    ssl_cert_free(s->cert);
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    /* Free up if allocated */
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    OPENSSL_free(s->tlsext_hostname);
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    SSL_CTX_free(s->initial_ctx);
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#ifndef OPENSSL_NO_EC
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    OPENSSL_free(s->tlsext_ecpointformatlist);
    OPENSSL_free(s->tlsext_ellipticcurvelist);
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#endif                         /* OPENSSL_NO_EC */
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    sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts, X509_EXTENSION_free);
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Rich Salz 已提交
578
    sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
R
Rich Salz 已提交
579 580
    OPENSSL_free(s->tlsext_ocsp_resp);
    OPENSSL_free(s->alpn_client_proto_list);
581

R
Rich Salz 已提交
582
    sk_X509_NAME_pop_free(s->client_CA, X509_NAME_free);
583 584 585 586

    if (s->method != NULL)
        s->method->ssl_free(s);

587
    RECORD_LAYER_release(&s->rlayer);
M
Matt Caswell 已提交
588

R
Rich Salz 已提交
589
    SSL_CTX_free(s->ctx);
D
Dr. Stephen Henson 已提交
590

591
#if !defined(OPENSSL_NO_NEXTPROTONEG)
R
Rich Salz 已提交
592
    OPENSSL_free(s->next_proto_negotiated);
B
Ben Laurie 已提交
593 594
#endif

P
Piotr Sikora 已提交
595
#ifndef OPENSSL_NO_SRTP
R
Rich Salz 已提交
596
    sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
597 598 599 600 601
#endif

    OPENSSL_free(s);
}

602 603
void SSL_set_rbio(SSL *s, BIO *rbio)
{
R
Rich Salz 已提交
604
    if (s->rbio != rbio)
605 606 607 608 609
        BIO_free_all(s->rbio);
    s->rbio = rbio;
}

void SSL_set_wbio(SSL *s, BIO *wbio)
610 611 612 613 614 615 616 617 618 619
{
    /*
     * If the output buffering BIO is still in place, remove it
     */
    if (s->bbio != NULL) {
        if (s->wbio == s->bbio) {
            s->wbio = s->wbio->next_bio;
            s->bbio->next_bio = NULL;
        }
    }
R
Rich Salz 已提交
620
    if (s->wbio != wbio && s->rbio != s->wbio)
621 622 623
        BIO_free_all(s->wbio);
    s->wbio = wbio;
}
624

625 626 627 628 629 630
void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio)
{
    SSL_set_wbio(s, wbio);
    SSL_set_rbio(s, rbio);
}

B
Ben Laurie 已提交
631
BIO *SSL_get_rbio(const SSL *s)
632 633 634
{
    return (s->rbio);
}
635

B
Ben Laurie 已提交
636
BIO *SSL_get_wbio(const SSL *s)
637 638 639
{
    return (s->wbio);
}
640

B
Ben Laurie 已提交
641
int SSL_get_fd(const SSL *s)
642 643 644
{
    return (SSL_get_rfd(s));
}
645

B
Ben Laurie 已提交
646
int SSL_get_rfd(const SSL *s)
647 648 649 650 651 652 653 654 655 656
{
    int ret = -1;
    BIO *b, *r;

    b = SSL_get_rbio(s);
    r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
    if (r != NULL)
        BIO_get_fd(r, &ret);
    return (ret);
}
657

B
Ben Laurie 已提交
658
int SSL_get_wfd(const SSL *s)
659 660 661 662 663 664 665 666 667 668
{
    int ret = -1;
    BIO *b, *r;

    b = SSL_get_wbio(s);
    r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
    if (r != NULL)
        BIO_get_fd(r, &ret);
    return (ret);
}
669

670
#ifndef OPENSSL_NO_SOCK
671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687
int SSL_set_fd(SSL *s, int fd)
{
    int ret = 0;
    BIO *bio = NULL;

    bio = BIO_new(BIO_s_socket());

    if (bio == NULL) {
        SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB);
        goto err;
    }
    BIO_set_fd(bio, fd, BIO_NOCLOSE);
    SSL_set_bio(s, bio, bio);
    ret = 1;
 err:
    return (ret);
}
688

689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732
int SSL_set_wfd(SSL *s, int fd)
{
    int ret = 0;
    BIO *bio = NULL;

    if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
        || ((int)BIO_get_fd(s->rbio, NULL) != fd)) {
        bio = BIO_new(BIO_s_socket());

        if (bio == NULL) {
            SSLerr(SSL_F_SSL_SET_WFD, ERR_R_BUF_LIB);
            goto err;
        }
        BIO_set_fd(bio, fd, BIO_NOCLOSE);
        SSL_set_bio(s, SSL_get_rbio(s), bio);
    } else
        SSL_set_bio(s, SSL_get_rbio(s), SSL_get_rbio(s));
    ret = 1;
 err:
    return (ret);
}

int SSL_set_rfd(SSL *s, int fd)
{
    int ret = 0;
    BIO *bio = NULL;

    if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
        || ((int)BIO_get_fd(s->wbio, NULL) != fd)) {
        bio = BIO_new(BIO_s_socket());

        if (bio == NULL) {
            SSLerr(SSL_F_SSL_SET_RFD, ERR_R_BUF_LIB);
            goto err;
        }
        BIO_set_fd(bio, fd, BIO_NOCLOSE);
        SSL_set_bio(s, bio, SSL_get_wbio(s));
    } else
        SSL_set_bio(s, SSL_get_wbio(s), SSL_get_wbio(s));
    ret = 1;
 err:
    return (ret);
}
#endif
733 734

/* return length of latest Finished message we sent, copy to 'buf' */
B
Ben Laurie 已提交
735
size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
736 737 738 739 740 741 742 743 744 745 746
{
    size_t ret = 0;

    if (s->s3 != NULL) {
        ret = s->s3->tmp.finish_md_len;
        if (count > ret)
            count = ret;
        memcpy(buf, s->s3->tmp.finish_md, count);
    }
    return ret;
}
747 748

/* return length of latest Finished message we expected, copy to 'buf' */
B
Ben Laurie 已提交
749
size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
750 751
{
    size_t ret = 0;
752

753 754 755 756 757 758 759 760
    if (s->s3 != NULL) {
        ret = s->s3->tmp.peer_finish_md_len;
        if (count > ret)
            count = ret;
        memcpy(buf, s->s3->tmp.peer_finish_md, count);
    }
    return ret;
}
761

B
Ben Laurie 已提交
762
int SSL_get_verify_mode(const SSL *s)
763 764 765
{
    return (s->verify_mode);
}
766

B
Ben Laurie 已提交
767
int SSL_get_verify_depth(const SSL *s)
768 769 770
{
    return X509_VERIFY_PARAM_get_depth(s->param);
}
771

772 773 774
int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *) {
    return (s->verify_callback);
}
775

B
Ben Laurie 已提交
776
int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
777 778 779
{
    return (ctx->verify_mode);
}
780

B
Ben Laurie 已提交
781
int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804
{
    return X509_VERIFY_PARAM_get_depth(ctx->param);
}

int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int, X509_STORE_CTX *) {
    return (ctx->default_verify_callback);
}

void SSL_set_verify(SSL *s, int mode,
                    int (*callback) (int ok, X509_STORE_CTX *ctx))
{
    s->verify_mode = mode;
    if (callback != NULL)
        s->verify_callback = callback;
}

void SSL_set_verify_depth(SSL *s, int depth)
{
    X509_VERIFY_PARAM_set_depth(s->param, depth);
}

void SSL_set_read_ahead(SSL *s, int yes)
{
805
    RECORD_LAYER_set_read_ahead(&s->rlayer, yes);
806
}
807

B
Ben Laurie 已提交
808
int SSL_get_read_ahead(const SSL *s)
809
{
810
    return RECORD_LAYER_get_read_ahead(&s->rlayer);
811
}
812

B
Ben Laurie 已提交
813
int SSL_pending(const SSL *s)
814 815 816 817 818 819 820 821 822 823
{
    /*
     * SSL_pending cannot work properly if read-ahead is enabled
     * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), and it is
     * impossible to fix since SSL_pending cannot report errors that may be
     * observed while scanning the new data. (Note that SSL_pending() is
     * often used as a boolean value, so we'd better not return -1.)
     */
    return (s->method->ssl_pending(s));
}
824

B
Ben Laurie 已提交
825
X509 *SSL_get_peer_certificate(const SSL *s)
826 827
{
    X509 *r;
828

829 830 831 832
    if ((s == NULL) || (s->session == NULL))
        r = NULL;
    else
        r = s->session->peer;
833

834 835
    if (r == NULL)
        return (r);
836

D
Dr. Stephen Henson 已提交
837
    X509_up_ref(r);
838 839 840

    return (r);
}
841

B
Ben Laurie 已提交
842
STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
843 844 845
{
    STACK_OF(X509) *r;

846
    if ((s == NULL) || (s->session == NULL))
847 848
        r = NULL;
    else
849
        r = s->session->peer_chain;
850 851 852 853 854 855 856 857 858 859 860 861 862

    /*
     * If we are a client, cert_chain includes the peer's own certificate; if
     * we are a server, it does not.
     */

    return (r);
}

/*
 * Now in theory, since the calling process own 't' it should be safe to
 * modify.  We need to be able to read f without being hassled
 */
M
Matt Caswell 已提交
863
int SSL_copy_session_id(SSL *t, const SSL *f)
864 865
{
    /* Do we need to to SSL locking? */
V
Viktor Dukhovni 已提交
866
    if (!SSL_set_session(t, SSL_get_session(f))) {
M
Matt Caswell 已提交
867
        return 0;
M
Matt Caswell 已提交
868
    }
869 870

    /*
M
Matt Caswell 已提交
871
     * what if we are setup for one protocol version but want to talk another
872 873 874 875 876 877 878
     */
    if (t->method != f->method) {
        t->method->ssl_free(t); /* cleanup current */
        t->method = f->method;  /* change method */
        t->method->ssl_new(t);  /* setup new */
    }

K
Kurt Roeckx 已提交
879 880 881
    CRYPTO_add(&f->cert->references, 1, CRYPTO_LOCK_SSL_CERT);
    ssl_cert_free(t->cert);
    t->cert = f->cert;
V
Viktor Dukhovni 已提交
882
    if (!SSL_set_session_id_context(t, f->sid_ctx, f->sid_ctx_length)) {
M
Matt Caswell 已提交
883
        return 0;
M
Matt Caswell 已提交
884
    }
M
Matt Caswell 已提交
885 886

    return 1;
887
}
888

889
/* Fix this so it checks all the valid key/cert options */
B
Ben Laurie 已提交
890
int SSL_CTX_check_private_key(const SSL_CTX *ctx)
891 892
{
    if ((ctx == NULL) ||
K
Kurt Roeckx 已提交
893
        (ctx->cert->key->x509 == NULL)) {
894 895 896 897 898 899 900 901 902 903 904 905
        SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,
               SSL_R_NO_CERTIFICATE_ASSIGNED);
        return (0);
    }
    if (ctx->cert->key->privatekey == NULL) {
        SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,
               SSL_R_NO_PRIVATE_KEY_ASSIGNED);
        return (0);
    }
    return (X509_check_private_key
            (ctx->cert->key->x509, ctx->cert->key->privatekey));
}
906

907
/* Fix this function so that it takes an optional type parameter */
B
Ben Laurie 已提交
908
int SSL_check_private_key(const SSL *ssl)
909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924
{
    if (ssl == NULL) {
        SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, ERR_R_PASSED_NULL_PARAMETER);
        return (0);
    }
    if (ssl->cert->key->x509 == NULL) {
        SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
        return (0);
    }
    if (ssl->cert->key->privatekey == NULL) {
        SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
        return (0);
    }
    return (X509_check_private_key(ssl->cert->key->x509,
                                   ssl->cert->key->privatekey));
}
925

M
Matt Caswell 已提交
926 927
int SSL_waiting_for_async(SSL *s)
{
M
Matt Caswell 已提交
928 929 930
    if(s->job)
        return 1;

M
Matt Caswell 已提交
931 932 933
    return 0;
}

M
Matt Caswell 已提交
934 935 936 937 938 939 940 941
int SSL_get_async_wait_fd(SSL *s)
{
    if (!s->job)
        return 0;

    return ASYNC_get_wait_fd(s->job);
}

M
Matt Caswell 已提交
942 943 944 945 946 947 948 949 950 951 952
static int ssl_accept_intern(void *vargs)
{
    struct ssl_async_args *args;
    SSL *s;

    args = (struct ssl_async_args *)vargs;
    s = args->s;

    return s->method->ssl_accept(s);
}

953
int SSL_accept(SSL *s)
954
{
M
Matt Caswell 已提交
955 956 957
    int ret;
    struct ssl_async_args args;

958 959 960
    if (s->handshake_func == 0)
        /* Not properly initialized yet */
        SSL_set_accept_state(s);
961

M
Matt Caswell 已提交
962 963
    args.s = s;

M
Matt Caswell 已提交
964
    if((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
M
Matt Caswell 已提交
965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982
        switch(ASYNC_start_job(&s->job, &ret, ssl_accept_intern, &args,
            sizeof(struct ssl_async_args))) {
        case ASYNC_ERR:
            SSLerr(SSL_F_SSL_ACCEPT, SSL_R_FAILED_TO_INIT_ASYNC);
            return -1;
        case ASYNC_PAUSE:
            return -1;
        case ASYNC_FINISH:
            s->job = NULL;
            return ret;
        default:
            SSLerr(SSL_F_SSL_ACCEPT, ERR_R_INTERNAL_ERROR);
            /* Shouldn't happen */
            return -1;
        }
    } else {
        return s->method->ssl_accept(s);
    }
983
}
984

985
int SSL_connect(SSL *s)
986 987 988 989
{
    if (s->handshake_func == 0)
        /* Not properly initialized yet */
        SSL_set_connect_state(s);
990

991 992
    return (s->method->ssl_connect(s));
}
993

B
Ben Laurie 已提交
994
long SSL_get_default_timeout(const SSL *s)
995 996 997 998
{
    return (s->method->get_timeout());
}

M
Matt Caswell 已提交
999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014

static int ssl_read_intern(void *vargs)
{
    struct ssl_async_args *args;
    SSL *s;
    void *buf;
    int num;

    args = (struct ssl_async_args *)vargs;
    s = args->s;
    buf = args->buf;
    num = args->num;

    return s->method->ssl_read(s, buf, num);
}

1015 1016
int SSL_read(SSL *s, void *buf, int num)
{
M
Matt Caswell 已提交
1017 1018 1019
    int ret;
    struct ssl_async_args args;

1020 1021 1022 1023 1024 1025 1026 1027 1028
    if (s->handshake_func == 0) {
        SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
        return -1;
    }

    if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
        s->rwstate = SSL_NOTHING;
        return (0);
    }
M
Matt Caswell 已提交
1029 1030 1031 1032 1033

    args.s = s;
    args.buf = buf;
    args.num = num;

M
Matt Caswell 已提交
1034
    if((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
M
Matt Caswell 已提交
1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055
        switch(ASYNC_start_job(&s->job, &ret, ssl_read_intern, &args,
            sizeof(struct ssl_async_args))) {
        case ASYNC_ERR:
            s->rwstate = SSL_NOTHING;
            SSLerr(SSL_F_SSL_READ, SSL_R_FAILED_TO_INIT_ASYNC);
            return -1;
        case ASYNC_PAUSE:
            s->rwstate = SSL_ASYNC_PAUSED;
            return -1;
        case ASYNC_FINISH:
            s->job = NULL;
            return ret;
        default:
            s->rwstate = SSL_NOTHING;
            SSLerr(SSL_F_SSL_READ, ERR_R_INTERNAL_ERROR);
            /* Shouldn't happen */
            return -1;
        }
    } else {
        return s->method->ssl_read(s, buf, num);
    }
1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070
}

int SSL_peek(SSL *s, void *buf, int num)
{
    if (s->handshake_func == 0) {
        SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
        return -1;
    }

    if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
        return (0);
    }
    return (s->method->ssl_peek(s, buf, num));
}

M
Matt Caswell 已提交
1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086
static int ssl_write_intern(void *vargs)
{
    struct ssl_async_args *args;
    SSL *s;
    const void *buf;
    int num;

    args = (struct ssl_async_args *)vargs;
    s = args->s;
    buf = args->buf;
    num = args->num;

    return s->method->ssl_write(s, buf, num);
}


1087 1088
int SSL_write(SSL *s, const void *buf, int num)
{
M
Matt Caswell 已提交
1089 1090 1091
    int ret;
    struct ssl_async_args args;

1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
    if (s->handshake_func == 0) {
        SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
        return -1;
    }

    if (s->shutdown & SSL_SENT_SHUTDOWN) {
        s->rwstate = SSL_NOTHING;
        SSLerr(SSL_F_SSL_WRITE, SSL_R_PROTOCOL_IS_SHUTDOWN);
        return (-1);
    }
M
Matt Caswell 已提交
1102 1103 1104 1105 1106

    args.s = s;
    args.buf = (void *) buf;
    args.num = num;

M
Matt Caswell 已提交
1107
    if((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
M
Matt Caswell 已提交
1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128
        switch(ASYNC_start_job(&s->job, &ret, ssl_write_intern, &args,
            sizeof(struct ssl_async_args))) {
        case ASYNC_ERR:
            s->rwstate = SSL_NOTHING;
            SSLerr(SSL_F_SSL_WRITE, SSL_R_FAILED_TO_INIT_ASYNC);
            return -1;
        case ASYNC_PAUSE:
            s->rwstate = SSL_ASYNC_PAUSED;
            return -1;
        case ASYNC_FINISH:
            s->job = NULL;
            return ret;
        default:
            s->rwstate = SSL_NOTHING;
            SSLerr(SSL_F_SSL_WRITE, ERR_R_INTERNAL_ERROR);
            /* Shouldn't happen */
            return -1;
        }
    } else {
        return s->method->ssl_write(s, buf, num);
    }
1129
}
1130

1131
int SSL_shutdown(SSL *s)
1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144
{
    /*
     * Note that this function behaves differently from what one might
     * expect.  Return values are 0 for no success (yet), 1 for success; but
     * calling it once is usually not enough, even if blocking I/O is used
     * (see ssl3_shutdown).
     */

    if (s->handshake_func == 0) {
        SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
        return -1;
    }

1145
    if (!SSL_in_init(s))
1146 1147 1148 1149
        return (s->method->ssl_shutdown(s));
    else
        return (1);
}
1150

1151
int SSL_renegotiate(SSL *s)
1152 1153 1154
{
    if (s->renegotiate == 0)
        s->renegotiate = 1;
D
Dr. Stephen Henson 已提交
1155

1156
    s->new_session = 1;
D
Dr. Stephen Henson 已提交
1157

1158 1159
    return (s->method->ssl_renegotiate(s));
}
1160

D
Dr. Stephen Henson 已提交
1161
int SSL_renegotiate_abbreviated(SSL *s)
1162 1163 1164
{
    if (s->renegotiate == 0)
        s->renegotiate = 1;
B
Bodo Möller 已提交
1165

1166
    s->new_session = 0;
B
Bodo Möller 已提交
1167

1168 1169
    return (s->method->ssl_renegotiate(s));
}
D
Dr. Stephen Henson 已提交
1170

1171
int SSL_renegotiate_pending(SSL *s)
1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185
{
    /*
     * becomes true when negotiation is requested; false again once a
     * handshake has finished
     */
    return (s->renegotiate != 0);
}

long SSL_ctrl(SSL *s, int cmd, long larg, void *parg)
{
    long l;

    switch (cmd) {
    case SSL_CTRL_GET_READ_AHEAD:
1186
        return (RECORD_LAYER_get_read_ahead(&s->rlayer));
1187
    case SSL_CTRL_SET_READ_AHEAD:
1188 1189
        l = RECORD_LAYER_get_read_ahead(&s->rlayer);
        RECORD_LAYER_set_read_ahead(&s->rlayer, larg);
1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226
        return (l);

    case SSL_CTRL_SET_MSG_CALLBACK_ARG:
        s->msg_callback_arg = parg;
        return 1;

    case SSL_CTRL_OPTIONS:
        return (s->options |= larg);
    case SSL_CTRL_CLEAR_OPTIONS:
        return (s->options &= ~larg);
    case SSL_CTRL_MODE:
        return (s->mode |= larg);
    case SSL_CTRL_CLEAR_MODE:
        return (s->mode &= ~larg);
    case SSL_CTRL_GET_MAX_CERT_LIST:
        return (s->max_cert_list);
    case SSL_CTRL_SET_MAX_CERT_LIST:
        l = s->max_cert_list;
        s->max_cert_list = larg;
        return (l);
    case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
        if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
            return 0;
        s->max_send_fragment = larg;
        return 1;
    case SSL_CTRL_GET_RI_SUPPORT:
        if (s->s3)
            return s->s3->send_connection_binding;
        else
            return 0;
    case SSL_CTRL_CERT_FLAGS:
        return (s->cert->cert_flags |= larg);
    case SSL_CTRL_CLEAR_CERT_FLAGS:
        return (s->cert->cert_flags &= ~larg);

    case SSL_CTRL_GET_RAW_CIPHERLIST:
        if (parg) {
D
Dr. Stephen Henson 已提交
1227
            if (s->s3->tmp.ciphers_raw == NULL)
1228
                return 0;
D
Dr. Stephen Henson 已提交
1229 1230
            *(unsigned char **)parg = s->s3->tmp.ciphers_raw;
            return (int)s->s3->tmp.ciphers_rawlen;
E
Emilia Kasper 已提交
1231 1232 1233
        } else {
            return TLS_CIPHER_LEN;
        }
1234
    case SSL_CTRL_GET_EXTMS_SUPPORT:
M
Matt Caswell 已提交
1235
        if (!s->session || SSL_in_init(s) || ossl_statem_get_in_handshake(s))
1236 1237
		return -1;
	if (s->session->flags & SSL_SESS_FLAG_EXTMS)
1238 1239 1240
            return 1;
        else
            return 0;
1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259
    default:
        return (s->method->ssl_ctrl(s, cmd, larg, parg));
    }
}

long SSL_callback_ctrl(SSL *s, int cmd, void (*fp) (void))
{
    switch (cmd) {
    case SSL_CTRL_SET_MSG_CALLBACK:
        s->msg_callback = (void (*)
                           (int write_p, int version, int content_type,
                            const void *buf, size_t len, SSL *ssl,
                            void *arg))(fp);
        return 1;

    default:
        return (s->method->ssl_callback_ctrl(s, cmd, fp));
    }
}
1260

B
Ben Laurie 已提交
1261
LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1262 1263 1264 1265 1266 1267 1268 1269 1270 1271
{
    return ctx->sessions;
}

long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
{
    long l;
    /* For some cases with ctx == NULL perform syntax checks */
    if (ctx == NULL) {
        switch (cmd) {
1272
#ifndef OPENSSL_NO_EC
1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375
        case SSL_CTRL_SET_CURVES_LIST:
            return tls1_set_curves_list(NULL, NULL, parg);
#endif
        case SSL_CTRL_SET_SIGALGS_LIST:
        case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
            return tls1_set_sigalgs_list(NULL, parg, 0);
        default:
            return 0;
        }
    }

    switch (cmd) {
    case SSL_CTRL_GET_READ_AHEAD:
        return (ctx->read_ahead);
    case SSL_CTRL_SET_READ_AHEAD:
        l = ctx->read_ahead;
        ctx->read_ahead = larg;
        return (l);

    case SSL_CTRL_SET_MSG_CALLBACK_ARG:
        ctx->msg_callback_arg = parg;
        return 1;

    case SSL_CTRL_GET_MAX_CERT_LIST:
        return (ctx->max_cert_list);
    case SSL_CTRL_SET_MAX_CERT_LIST:
        l = ctx->max_cert_list;
        ctx->max_cert_list = larg;
        return (l);

    case SSL_CTRL_SET_SESS_CACHE_SIZE:
        l = ctx->session_cache_size;
        ctx->session_cache_size = larg;
        return (l);
    case SSL_CTRL_GET_SESS_CACHE_SIZE:
        return (ctx->session_cache_size);
    case SSL_CTRL_SET_SESS_CACHE_MODE:
        l = ctx->session_cache_mode;
        ctx->session_cache_mode = larg;
        return (l);
    case SSL_CTRL_GET_SESS_CACHE_MODE:
        return (ctx->session_cache_mode);

    case SSL_CTRL_SESS_NUMBER:
        return (lh_SSL_SESSION_num_items(ctx->sessions));
    case SSL_CTRL_SESS_CONNECT:
        return (ctx->stats.sess_connect);
    case SSL_CTRL_SESS_CONNECT_GOOD:
        return (ctx->stats.sess_connect_good);
    case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
        return (ctx->stats.sess_connect_renegotiate);
    case SSL_CTRL_SESS_ACCEPT:
        return (ctx->stats.sess_accept);
    case SSL_CTRL_SESS_ACCEPT_GOOD:
        return (ctx->stats.sess_accept_good);
    case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
        return (ctx->stats.sess_accept_renegotiate);
    case SSL_CTRL_SESS_HIT:
        return (ctx->stats.sess_hit);
    case SSL_CTRL_SESS_CB_HIT:
        return (ctx->stats.sess_cb_hit);
    case SSL_CTRL_SESS_MISSES:
        return (ctx->stats.sess_miss);
    case SSL_CTRL_SESS_TIMEOUTS:
        return (ctx->stats.sess_timeout);
    case SSL_CTRL_SESS_CACHE_FULL:
        return (ctx->stats.sess_cache_full);
    case SSL_CTRL_OPTIONS:
        return (ctx->options |= larg);
    case SSL_CTRL_CLEAR_OPTIONS:
        return (ctx->options &= ~larg);
    case SSL_CTRL_MODE:
        return (ctx->mode |= larg);
    case SSL_CTRL_CLEAR_MODE:
        return (ctx->mode &= ~larg);
    case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
        if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
            return 0;
        ctx->max_send_fragment = larg;
        return 1;
    case SSL_CTRL_CERT_FLAGS:
        return (ctx->cert->cert_flags |= larg);
    case SSL_CTRL_CLEAR_CERT_FLAGS:
        return (ctx->cert->cert_flags &= ~larg);
    default:
        return (ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg));
    }
}

long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void))
{
    switch (cmd) {
    case SSL_CTRL_SET_MSG_CALLBACK:
        ctx->msg_callback = (void (*)
                             (int write_p, int version, int content_type,
                              const void *buf, size_t len, SSL *ssl,
                              void *arg))(fp);
        return 1;

    default:
        return (ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp));
    }
}
1376

1377
int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1378
{
1379 1380 1381 1382 1383
    if (a->id > b->id)
        return 1;
    if (a->id < b->id)
        return -1;
    return 0;
1384 1385 1386 1387 1388
}

int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap,
                          const SSL_CIPHER *const *bp)
{
1389 1390 1391 1392 1393
    if ((*ap)->id > (*bp)->id)
        return 1;
    if ((*ap)->id < (*bp)->id)
        return -1;
    return 0;
1394
}
1395

1396
/** return a STACK of the ciphers available for the SSL and in order of
1397
 * preference */
B
Ben Laurie 已提交
1398
STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409
{
    if (s != NULL) {
        if (s->cipher_list != NULL) {
            return (s->cipher_list);
        } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) {
            return (s->ctx->cipher_list);
        }
    }
    return (NULL);
}

1410 1411 1412 1413 1414 1415 1416
STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s)
{
    if ((s == NULL) || (s->session == NULL) || !s->server)
        return NULL;
    return s->session->ciphers;
}

1417
STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s)
1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439
{
    STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers;
    int i;
    ciphers = SSL_get_ciphers(s);
    if (!ciphers)
        return NULL;
    ssl_set_client_disabled(s);
    for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
        const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
        if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) {
            if (!sk)
                sk = sk_SSL_CIPHER_new_null();
            if (!sk)
                return NULL;
            if (!sk_SSL_CIPHER_push(sk, c)) {
                sk_SSL_CIPHER_free(sk);
                return NULL;
            }
        }
    }
    return sk;
}
1440

1441
/** return a STACK of the ciphers available for the SSL and in order of
1442
 * algorithm id */
B
Ben Laurie 已提交
1443
STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1444 1445 1446 1447 1448 1449 1450 1451 1452 1453
{
    if (s != NULL) {
        if (s->cipher_list_by_id != NULL) {
            return (s->cipher_list_by_id);
        } else if ((s->ctx != NULL) && (s->ctx->cipher_list_by_id != NULL)) {
            return (s->ctx->cipher_list_by_id);
        }
    }
    return (NULL);
}
1454

1455
/** The old interface to get the same thing as SSL_get_ciphers() */
1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470
const char *SSL_get_cipher_list(const SSL *s, int n)
{
    SSL_CIPHER *c;
    STACK_OF(SSL_CIPHER) *sk;

    if (s == NULL)
        return (NULL);
    sk = SSL_get_ciphers(s);
    if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
        return (NULL);
    c = sk_SSL_CIPHER_value(sk, n);
    if (c == NULL)
        return (NULL);
    return (c->name);
}
1471

1472
/** specify the ciphers to be used by default by the SSL_CTX */
1473
int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493
{
    STACK_OF(SSL_CIPHER) *sk;

    sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list,
                                &ctx->cipher_list_by_id, str, ctx->cert);
    /*
     * ssl_create_cipher_list may return an empty stack if it was unable to
     * find a cipher matching the given rule string (for example if the rule
     * string specifies a cipher which has been disabled). This is not an
     * error as far as ssl_create_cipher_list is concerned, and hence
     * ctx->cipher_list and ctx->cipher_list_by_id has been updated.
     */
    if (sk == NULL)
        return 0;
    else if (sk_SSL_CIPHER_num(sk) == 0) {
        SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
        return 0;
    }
    return 1;
}
1494

1495
/** specify the ciphers to be used by the SSL */
1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510
int SSL_set_cipher_list(SSL *s, const char *str)
{
    STACK_OF(SSL_CIPHER) *sk;

    sk = ssl_create_cipher_list(s->ctx->method, &s->cipher_list,
                                &s->cipher_list_by_id, str, s->cert);
    /* see comment in SSL_CTX_set_cipher_list */
    if (sk == NULL)
        return 0;
    else if (sk_SSL_CIPHER_num(sk) == 0) {
        SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
        return 0;
    }
    return 1;
}
1511

1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547
char *SSL_get_shared_ciphers(const SSL *s, char *buf, int len)
{
    char *p;
    STACK_OF(SSL_CIPHER) *sk;
    SSL_CIPHER *c;
    int i;

    if ((s->session == NULL) || (s->session->ciphers == NULL) || (len < 2))
        return (NULL);

    p = buf;
    sk = s->session->ciphers;

    if (sk_SSL_CIPHER_num(sk) == 0)
        return NULL;

    for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
        int n;

        c = sk_SSL_CIPHER_value(sk, i);
        n = strlen(c->name);
        if (n + 1 > len) {
            if (p != buf)
                --p;
            *p = '\0';
            return buf;
        }
        strcpy(p, c->name);
        p += n;
        *(p++) = ':';
        len -= n + 1;
    }
    p[-1] = '\0';
    return (buf);
}

1548
/** return a servername extension value if provided in Client Hello, or NULL.
1549
 * So far, only host_name types are defined (RFC 3546).
1550 1551
 */

1552
const char *SSL_get_servername(const SSL *s, const int type)
1553 1554 1555
{
    if (type != TLSEXT_NAMETYPE_host_name)
        return NULL;
B
Bodo Möller 已提交
1556

1557 1558 1559
    return s->session && !s->tlsext_hostname ?
        s->session->tlsext_hostname : s->tlsext_hostname;
}
1560

1561
int SSL_get_servername_type(const SSL *s)
1562 1563 1564 1565 1566 1567 1568
{
    if (s->session
        && (!s->tlsext_hostname ? s->session->
            tlsext_hostname : s->tlsext_hostname))
        return TLSEXT_NAMETYPE_host_name;
    return -1;
}
B
Ben Laurie 已提交
1569

1570 1571
/*
 * SSL_select_next_proto implements the standard protocol selection. It is
B
Ben Laurie 已提交
1572
 * expected that this function is called from the callback set by
1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588
 * SSL_CTX_set_next_proto_select_cb. The protocol data is assumed to be a
 * vector of 8-bit, length prefixed byte strings. The length byte itself is
 * not included in the length. A byte string of length 0 is invalid. No byte
 * string may be truncated. The current, but experimental algorithm for
 * selecting the protocol is: 1) If the server doesn't support NPN then this
 * is indicated to the callback. In this case, the client application has to
 * abort the connection or have a default application level protocol. 2) If
 * the server supports NPN, but advertises an empty list then the client
 * selects the first protcol in its list, but indicates via the API that this
 * fallback case was enacted. 3) Otherwise, the client finds the first
 * protocol in the server's list that it supports and selects this protocol.
 * This is because it's assumed that the server has better information about
 * which protocol a client should use. 4) If the client doesn't support any
 * of the server's advertised protocols, then this is treated the same as
 * case 2. It returns either OPENSSL_NPN_NEGOTIATED if a common protocol was
 * found, or OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
B
Ben Laurie 已提交
1589
 */
1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627
int SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
                          const unsigned char *server,
                          unsigned int server_len,
                          const unsigned char *client,
                          unsigned int client_len)
{
    unsigned int i, j;
    const unsigned char *result;
    int status = OPENSSL_NPN_UNSUPPORTED;

    /*
     * For each protocol in server preference order, see if we support it.
     */
    for (i = 0; i < server_len;) {
        for (j = 0; j < client_len;) {
            if (server[i] == client[j] &&
                memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) {
                /* We found a match */
                result = &server[i];
                status = OPENSSL_NPN_NEGOTIATED;
                goto found;
            }
            j += client[j];
            j++;
        }
        i += server[i];
        i++;
    }

    /* There's no overlap between our protocols and the server's list. */
    result = client;
    status = OPENSSL_NPN_NO_OVERLAP;

 found:
    *out = (unsigned char *)result + 1;
    *outlen = result[0];
    return status;
}
B
Ben Laurie 已提交
1628

1629
#ifndef OPENSSL_NO_NEXTPROTONEG
1630 1631 1632 1633 1634 1635
/*
 * SSL_get0_next_proto_negotiated sets *data and *len to point to the
 * client's requested protocol for this connection and returns 0. If the
 * client didn't request any protocol, then *data is set to NULL. Note that
 * the client can request any protocol it chooses. The value returned from
 * this function need not be a member of the list of supported protocols
B
Ben Laurie 已提交
1636 1637
 * provided by the callback.
 */
1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671
void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
                                    unsigned *len)
{
    *data = s->next_proto_negotiated;
    if (!*data) {
        *len = 0;
    } else {
        *len = s->next_proto_negotiated_len;
    }
}

/*
 * SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when
 * a TLS server needs a list of supported protocols for Next Protocol
 * Negotiation. The returned list must be in wire format.  The list is
 * returned by setting |out| to point to it and |outlen| to its length. This
 * memory will not be modified, but one should assume that the SSL* keeps a
 * reference to it. The callback should return SSL_TLSEXT_ERR_OK if it
 * wishes to advertise. Otherwise, no such extension will be included in the
 * ServerHello.
 */
void SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx,
                                           int (*cb) (SSL *ssl,
                                                      const unsigned char
                                                      **out,
                                                      unsigned int *outlen,
                                                      void *arg), void *arg)
{
    ctx->next_protos_advertised_cb = cb;
    ctx->next_protos_advertised_cb_arg = arg;
}

/*
 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
B
Ben Laurie 已提交
1672 1673
 * client needs to select a protocol from the server's provided list. |out|
 * must be set to point to the selected protocol (which may be within |in|).
1674 1675 1676 1677 1678
 * The length of the protocol name must be written into |outlen|. The
 * server's advertised protocols are provided in |in| and |inlen|. The
 * callback can assume that |in| is syntactically valid. The client must
 * select a protocol. It is fatal to the connection if this callback returns
 * a value other than SSL_TLSEXT_ERR_OK.
B
Ben Laurie 已提交
1679
 */
1680 1681 1682 1683 1684 1685 1686 1687 1688 1689
void SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx,
                                      int (*cb) (SSL *s, unsigned char **out,
                                                 unsigned char *outlen,
                                                 const unsigned char *in,
                                                 unsigned int inlen,
                                                 void *arg), void *arg)
{
    ctx->next_proto_select_cb = cb;
    ctx->next_proto_select_cb_arg = arg;
}
1690
#endif
1691

1692 1693
/*
 * SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
A
Adam Langley 已提交
1694
 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
1695 1696 1697 1698 1699
 * length-prefixed strings). Returns 0 on success.
 */
int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos,
                            unsigned protos_len)
{
R
Rich Salz 已提交
1700
    OPENSSL_free(ctx->alpn_client_proto_list);
1701
    ctx->alpn_client_proto_list = OPENSSL_malloc(protos_len);
1702
    if (ctx->alpn_client_proto_list == NULL)
1703 1704 1705 1706 1707 1708 1709 1710 1711
        return 1;
    memcpy(ctx->alpn_client_proto_list, protos, protos_len);
    ctx->alpn_client_proto_list_len = protos_len;

    return 0;
}

/*
 * SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|.
A
Adam Langley 已提交
1712
 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
1713 1714 1715 1716 1717
 * length-prefixed strings). Returns 0 on success.
 */
int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos,
                        unsigned protos_len)
{
R
Rich Salz 已提交
1718
    OPENSSL_free(ssl->alpn_client_proto_list);
1719
    ssl->alpn_client_proto_list = OPENSSL_malloc(protos_len);
1720
    if (ssl->alpn_client_proto_list == NULL)
1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750
        return 1;
    memcpy(ssl->alpn_client_proto_list, protos, protos_len);
    ssl->alpn_client_proto_list_len = protos_len;

    return 0;
}

/*
 * SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is
 * called during ClientHello processing in order to select an ALPN protocol
 * from the client's list of offered protocols.
 */
void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx,
                                int (*cb) (SSL *ssl,
                                           const unsigned char **out,
                                           unsigned char *outlen,
                                           const unsigned char *in,
                                           unsigned int inlen,
                                           void *arg), void *arg)
{
    ctx->alpn_select_cb = cb;
    ctx->alpn_select_cb_arg = arg;
}

/*
 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from
 * |ssl|. On return it sets |*data| to point to |*len| bytes of protocol name
 * (not including the leading length-prefix byte). If the server didn't
 * respond with a negotiated protocol then |*len| will be zero.
 */
A
Adam Langley 已提交
1751
void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762
                            unsigned *len)
{
    *data = NULL;
    if (ssl->s3)
        *data = ssl->s3->alpn_selected;
    if (*data == NULL)
        *len = 0;
    else
        *len = ssl->s3->alpn_selected_len;
}

1763

1764
int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1765 1766 1767 1768 1769 1770
                               const char *label, size_t llen,
                               const unsigned char *p, size_t plen,
                               int use_context)
{
    if (s->version < TLS1_VERSION)
        return -1;
B
Ben Laurie 已提交
1771

1772 1773 1774 1775
    return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
                                                       llen, p, plen,
                                                       use_context);
}
B
Ben Laurie 已提交
1776

B
Ben Laurie 已提交
1777
static unsigned long ssl_session_hash(const SSL_SESSION *a)
1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790
{
    unsigned long l;

    l = (unsigned long)
        ((unsigned int)a->session_id[0]) |
        ((unsigned int)a->session_id[1] << 8L) |
        ((unsigned long)a->session_id[2] << 16L) |
        ((unsigned long)a->session_id[3] << 24L);
    return (l);
}

/*
 * NB: If this function (or indeed the hash function which uses a sort of
1791
 * coarser function than this one) is changed, ensure
1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806
 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on
 * being able to construct an SSL_SESSION that will collide with any existing
 * session with a matching session ID.
 */
static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b)
{
    if (a->ssl_version != b->ssl_version)
        return (1);
    if (a->session_id_length != b->session_id_length)
        return (1);
    return (memcmp(a->session_id, b->session_id, a->session_id_length));
}

/*
 * These wrapper functions should remain rather than redeclaring
1807
 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1808 1809 1810
 * variable. The reason is that the functions aren't static, they're exposed
 * via ssl.h.
 */
B
Ben Laurie 已提交
1811 1812
static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1813

1814
SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831
{
    SSL_CTX *ret = NULL;

    if (meth == NULL) {
        SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED);
        return (NULL);
    }

    if (FIPS_mode() && (meth->version < TLS1_VERSION)) {
        SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
        return NULL;
    }

    if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) {
        SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
        goto err;
    }
R
Rich Salz 已提交
1832
    ret = OPENSSL_zalloc(sizeof(*ret));
1833 1834 1835 1836 1837 1838
    if (ret == NULL)
        goto err;

    ret->method = meth;
    ret->session_cache_mode = SSL_SESS_CACHE_SERVER;
    ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
R
Rich Salz 已提交
1839
    /* We take the system default. */
1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853
    ret->session_timeout = meth->get_timeout();
    ret->references = 1;
    ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT;
    ret->verify_mode = SSL_VERIFY_NONE;
    if ((ret->cert = ssl_cert_new()) == NULL)
        goto err;

    ret->sessions = lh_SSL_SESSION_new();
    if (ret->sessions == NULL)
        goto err;
    ret->cert_store = X509_STORE_new();
    if (ret->cert_store == NULL)
        goto err;

V
Viktor Dukhovni 已提交
1854
    if (!ssl_create_cipher_list(ret->method,
1855
                           &ret->cipher_list, &ret->cipher_list_by_id,
M
Matt Caswell 已提交
1856 1857
                           SSL_DEFAULT_CIPHER_LIST, ret->cert)
       || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) {
1858 1859 1860 1861 1862
        SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS);
        goto err2;
    }

    ret->param = X509_VERIFY_PARAM_new();
1863
    if (ret->param == NULL)
1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884
        goto err;

    if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) {
        SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
        goto err2;
    }
    if ((ret->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) {
        SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
        goto err2;
    }

    if ((ret->client_CA = sk_X509_NAME_new_null()) == NULL)
        goto err;

    CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);

    /* No compression for DTLS */
    if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS))
        ret->comp_methods = SSL_COMP_get_compression_methods();

    ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1885

1886
    /* Setup RFC4507 ticket keys */
M
Matt Caswell 已提交
1887
    if ((RAND_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1888 1889 1890
        || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
        || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
        ret->options |= SSL_OP_NO_TICKET;
1891

B
Ben Laurie 已提交
1892
#ifndef OPENSSL_NO_SRP
V
Viktor Dukhovni 已提交
1893
    if (!SSL_CTX_SRP_CTX_init(ret))
M
Matt Caswell 已提交
1894
        goto err;
B
Ben Laurie 已提交
1895
#endif
1896
#ifndef OPENSSL_NO_ENGINE
1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923
# ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
#  define eng_strx(x)     #x
#  define eng_str(x)      eng_strx(x)
    /* Use specific client engine automatically... ignore errors */
    {
        ENGINE *eng;
        eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
        if (!eng) {
            ERR_clear_error();
            ENGINE_load_builtin_engines();
            eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
        }
        if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
            ERR_clear_error();
    }
# endif
#endif
    /*
     * Default is to connect to non-RI servers. When RI is more widely
     * deployed might change this.
     */
    ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;

    return (ret);
 err:
    SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE);
 err2:
R
Rich Salz 已提交
1924
    SSL_CTX_free(ret);
1925 1926
    return (NULL);
}
1927

1928
void SSL_CTX_free(SSL_CTX *a)
1929 1930
{
    int i;
1931

1932 1933
    if (a == NULL)
        return;
1934

1935
    i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_SSL_CTX);
1936
#ifdef REF_PRINT
1937
    REF_PRINT("SSL_CTX", a);
1938
#endif
1939 1940
    if (i > 0)
        return;
1941
#ifdef REF_CHECK
1942 1943 1944 1945 1946 1947
    if (i < 0) {
        fprintf(stderr, "SSL_CTX_free, bad reference count\n");
        abort();                /* ok */
    }
#endif

R
Rich Salz 已提交
1948
    X509_VERIFY_PARAM_free(a->param);
1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962

    /*
     * Free internal session cache. However: the remove_cb() may reference
     * the ex_data of SSL_CTX, thus the ex_data store can only be removed
     * after the sessions were flushed.
     * As the ex_data handling routines might also touch the session cache,
     * the most secure solution seems to be: empty (flush) the cache, then
     * free ex_data, then finally free the cache.
     * (See ticket [openssl.org #212].)
     */
    if (a->sessions != NULL)
        SSL_CTX_flush_sessions(a, 0);

    CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
R
Rich Salz 已提交
1963
    lh_SSL_SESSION_free(a->sessions);
R
Rich Salz 已提交
1964
    X509_STORE_free(a->cert_store);
R
Rich Salz 已提交
1965 1966
    sk_SSL_CIPHER_free(a->cipher_list);
    sk_SSL_CIPHER_free(a->cipher_list_by_id);
R
Rich Salz 已提交
1967
    ssl_cert_free(a->cert);
R
Rich Salz 已提交
1968 1969
    sk_X509_NAME_pop_free(a->client_CA, X509_NAME_free);
    sk_X509_pop_free(a->extra_certs, X509_free);
1970
    a->comp_methods = NULL;
P
Piotr Sikora 已提交
1971
#ifndef OPENSSL_NO_SRTP
R
Rich Salz 已提交
1972
    sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
P
Piotr Sikora 已提交
1973
#endif
B
Ben Laurie 已提交
1974
#ifndef OPENSSL_NO_SRP
1975
    SSL_CTX_SRP_CTX_free(a);
B
Ben Laurie 已提交
1976
#endif
1977
#ifndef OPENSSL_NO_ENGINE
1978 1979
    if (a->client_cert_engine)
        ENGINE_finish(a->client_cert_engine);
1980
#endif
B
Ben Laurie 已提交
1981

1982
#ifndef OPENSSL_NO_EC
R
Rich Salz 已提交
1983 1984
    OPENSSL_free(a->tlsext_ecpointformatlist);
    OPENSSL_free(a->tlsext_ellipticcurvelist);
B
Ben Laurie 已提交
1985
#endif
1986
    OPENSSL_free(a->alpn_client_proto_list);
B
Ben Laurie 已提交
1987

1988 1989
    OPENSSL_free(a);
}
1990

1991
void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1992 1993 1994 1995 1996 1997 1998 1999 2000
{
    ctx->default_passwd_callback = cb;
}

void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u)
{
    ctx->default_passwd_callback_userdata = u;
}

M
Matt Caswell 已提交
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
void SSL_set_default_passwd_cb(SSL *s, pem_password_cb *cb)
{
    s->default_passwd_callback = cb;
}

void SSL_set_default_passwd_cb_userdata(SSL *s, void *u)
{
    s->default_passwd_callback_userdata = u;
}

2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040
void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,
                                      int (*cb) (X509_STORE_CTX *, void *),
                                      void *arg)
{
    ctx->app_verify_callback = cb;
    ctx->app_verify_arg = arg;
}

void SSL_CTX_set_verify(SSL_CTX *ctx, int mode,
                        int (*cb) (int, X509_STORE_CTX *))
{
    ctx->verify_mode = mode;
    ctx->default_verify_callback = cb;
}

void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth)
{
    X509_VERIFY_PARAM_set_depth(ctx->param, depth);
}

void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg),
                         void *arg)
{
    ssl_cert_set_cert_cb(c->cert, cb, arg);
}

void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg)
{
    ssl_cert_set_cert_cb(s->cert, cb, arg);
}
2041

2042
void ssl_set_masks(SSL *s, const SSL_CIPHER *cipher)
2043 2044
{
    CERT_PKEY *cpk;
2045
    CERT *c = s->cert;
2046
    uint32_t *pvalid = s->s3->tmp.valid_flags;
2047 2048 2049 2050
    int rsa_enc, rsa_tmp, rsa_sign, dh_tmp, dh_rsa, dh_dsa, dsa_sign;
    int rsa_enc_export, dh_rsa_export, dh_dsa_export;
    int rsa_tmp_export, dh_tmp_export, kl;
    unsigned long mask_k, mask_a, emask_k, emask_a;
2051
#ifndef OPENSSL_NO_EC
2052 2053 2054 2055
    int have_ecc_cert, ecdsa_ok, ecc_pkey_size;
    int have_ecdh_tmp, ecdh_ok;
    X509 *x = NULL;
    EVP_PKEY *ecc_pkey = NULL;
2056
    int pk_nid = 0, md_nid = 0;
2057
#endif
2058 2059
    if (c == NULL)
        return;
2060

2061
    kl = SSL_C_EXPORT_PKEYLENGTH(cipher);
2062

2063
#ifndef OPENSSL_NO_RSA
2064 2065 2066
    rsa_tmp = (c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
    rsa_tmp_export = (c->rsa_tmp_cb != NULL ||
                      (rsa_tmp && RSA_size(c->rsa_tmp) * 8 <= kl));
2067
#else
2068
    rsa_tmp = rsa_tmp_export = 0;
2069
#endif
2070
#ifndef OPENSSL_NO_DH
2071 2072 2073 2074
    dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || c->dh_tmp_auto);
    dh_tmp_export = !c->dh_tmp_auto && (c->dh_tmp_cb != NULL ||
                                        (dh_tmp
                                         && DH_size(c->dh_tmp) * 8 <= kl));
2075
#else
2076
    dh_tmp = dh_tmp_export = 0;
2077 2078
#endif

2079
#ifndef OPENSSL_NO_EC
2080 2081 2082
    have_ecdh_tmp = (c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
#endif
    cpk = &(c->pkeys[SSL_PKEY_RSA_ENC]);
2083
    rsa_enc = pvalid[SSL_PKEY_RSA_ENC] & CERT_PKEY_VALID;
2084 2085
    rsa_enc_export = (rsa_enc && EVP_PKEY_size(cpk->privatekey) * 8 <= kl);
    cpk = &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2086
    rsa_sign = pvalid[SSL_PKEY_RSA_SIGN] & CERT_PKEY_SIGN;
2087
    cpk = &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2088
    dsa_sign = pvalid[SSL_PKEY_DSA_SIGN] & CERT_PKEY_SIGN;
2089
    cpk = &(c->pkeys[SSL_PKEY_DH_RSA]);
2090
    dh_rsa = pvalid[SSL_PKEY_DH_RSA] & CERT_PKEY_VALID;
2091 2092
    dh_rsa_export = (dh_rsa && EVP_PKEY_size(cpk->privatekey) * 8 <= kl);
    cpk = &(c->pkeys[SSL_PKEY_DH_DSA]);
2093
    dh_dsa = pvalid[SSL_PKEY_DH_DSA] & CERT_PKEY_VALID;
2094 2095
    dh_dsa_export = (dh_dsa && EVP_PKEY_size(cpk->privatekey) * 8 <= kl);
    cpk = &(c->pkeys[SSL_PKEY_ECC]);
2096
#ifndef OPENSSL_NO_EC
2097
    have_ecc_cert = pvalid[SSL_PKEY_ECC] & CERT_PKEY_VALID;
2098
#endif
2099 2100 2101 2102
    mask_k = 0;
    mask_a = 0;
    emask_k = 0;
    emask_a = 0;
2103

2104
#ifdef CIPHER_DEBUG
2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120
    fprintf(stderr,
            "rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
            rsa_tmp, rsa_tmp_export, dh_tmp, have_ecdh_tmp, rsa_enc,
            rsa_enc_export, rsa_sign, dsa_sign, dh_rsa, dh_dsa);
#endif

    cpk = &(c->pkeys[SSL_PKEY_GOST01]);
    if (cpk->x509 != NULL && cpk->privatekey != NULL) {
        mask_k |= SSL_kGOST;
        mask_a |= SSL_aGOST01;
    }

    if (rsa_enc || (rsa_tmp && rsa_sign))
        mask_k |= SSL_kRSA;
    if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
        emask_k |= SSL_kRSA;
2121

2122 2123
    if (dh_tmp_export)
        emask_k |= SSL_kDHE;
2124

2125 2126
    if (dh_tmp)
        mask_k |= SSL_kDHE;
2127

2128 2129 2130 2131
    if (dh_rsa)
        mask_k |= SSL_kDHr;
    if (dh_rsa_export)
        emask_k |= SSL_kDHr;
2132

2133 2134 2135 2136
    if (dh_dsa)
        mask_k |= SSL_kDHd;
    if (dh_dsa_export)
        emask_k |= SSL_kDHd;
2137

2138
    if (mask_k & (SSL_kDHr | SSL_kDHd))
2139
        mask_a |= SSL_aDH;
2140

2141 2142 2143 2144
    if (rsa_enc || rsa_sign) {
        mask_a |= SSL_aRSA;
        emask_a |= SSL_aRSA;
    }
2145

2146 2147 2148 2149
    if (dsa_sign) {
        mask_a |= SSL_aDSS;
        emask_a |= SSL_aDSS;
    }
2150

2151 2152
    mask_a |= SSL_aNULL;
    emask_a |= SSL_aNULL;
2153

2154 2155 2156 2157
    /*
     * An ECC certificate may be usable for ECDH and/or ECDSA cipher suites
     * depending on the key usage extension.
     */
2158
#ifndef OPENSSL_NO_EC
2159
    if (have_ecc_cert) {
2160
        uint32_t ex_kusage;
2161 2162
        cpk = &c->pkeys[SSL_PKEY_ECC];
        x = cpk->x509;
2163 2164 2165
        ex_kusage = X509_get_key_usage(x);
        ecdh_ok = ex_kusage & X509v3_KU_KEY_AGREEMENT;
        ecdsa_ok = ex_kusage & X509v3_KU_DIGITAL_SIGNATURE;
2166
        if (!(pvalid[SSL_PKEY_ECC] & CERT_PKEY_SIGN))
2167 2168 2169 2170
            ecdsa_ok = 0;
        ecc_pkey = X509_get_pubkey(x);
        ecc_pkey_size = (ecc_pkey != NULL) ? EVP_PKEY_bits(ecc_pkey) : 0;
        EVP_PKEY_free(ecc_pkey);
2171
        OBJ_find_sigid_algs(X509_get_signature_nid(x), &md_nid, &pk_nid);
2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196
        if (ecdh_ok) {

            if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa) {
                mask_k |= SSL_kECDHr;
                mask_a |= SSL_aECDH;
                if (ecc_pkey_size <= 163) {
                    emask_k |= SSL_kECDHr;
                    emask_a |= SSL_aECDH;
                }
            }

            if (pk_nid == NID_X9_62_id_ecPublicKey) {
                mask_k |= SSL_kECDHe;
                mask_a |= SSL_aECDH;
                if (ecc_pkey_size <= 163) {
                    emask_k |= SSL_kECDHe;
                    emask_a |= SSL_aECDH;
                }
            }
        }
        if (ecdsa_ok) {
            mask_a |= SSL_aECDSA;
            emask_a |= SSL_aECDSA;
        }
    }
2197
#endif
B
Bodo Möller 已提交
2198

2199
#ifndef OPENSSL_NO_EC
2200 2201 2202 2203
    if (have_ecdh_tmp) {
        mask_k |= SSL_kECDHE;
        emask_k |= SSL_kECDHE;
    }
B
Bodo Möller 已提交
2204
#endif
2205 2206

#ifndef OPENSSL_NO_PSK
2207 2208 2209 2210
    mask_k |= SSL_kPSK;
    mask_a |= SSL_aPSK;
    emask_k |= SSL_kPSK;
    emask_a |= SSL_aPSK;
2211 2212 2213 2214 2215 2216
    if (mask_k & SSL_kRSA)
        mask_k |= SSL_kRSAPSK;
    if (mask_k & SSL_kDHE)
        mask_k |= SSL_kDHEPSK;
    if (mask_k & SSL_kECDHE)
        mask_k |= SSL_kECDHEPSK;
2217 2218
#endif

2219 2220 2221 2222
    s->s3->tmp.mask_k = mask_k;
    s->s3->tmp.mask_a = mask_a;
    s->s3->tmp.export_mask_k = emask_k;
    s->s3->tmp.export_mask_a = emask_a;
2223
}
2224

2225 2226
#ifndef OPENSSL_NO_EC

2227
int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2228 2229 2230 2231
{
    unsigned long alg_k, alg_a;
    EVP_PKEY *pkey = NULL;
    int keysize = 0;
2232
    int md_nid = 0, pk_nid = 0;
2233
    const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2234
    uint32_t ex_kusage = X509_get_key_usage(x);
2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249

    alg_k = cs->algorithm_mkey;
    alg_a = cs->algorithm_auth;

    if (SSL_C_IS_EXPORT(cs)) {
        /* ECDH key length in export ciphers must be <= 163 bits */
        pkey = X509_get_pubkey(x);
        if (pkey == NULL)
            return 0;
        keysize = EVP_PKEY_bits(pkey);
        EVP_PKEY_free(pkey);
        if (keysize > 163)
            return 0;
    }

2250 2251
    OBJ_find_sigid_algs(X509_get_signature_nid(x), &md_nid, &pk_nid);

2252 2253
    if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr) {
        /* key usage, if present, must allow key agreement */
2254
        if (!(ex_kusage & X509v3_KU_KEY_AGREEMENT)) {
2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278
            SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
                   SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
            return 0;
        }
        if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION) {
            /* signature alg must be ECDSA */
            if (pk_nid != NID_X9_62_id_ecPublicKey) {
                SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
                       SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
                return 0;
            }
        }
        if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION) {
            /* signature alg must be RSA */

            if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa) {
                SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
                       SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
                return 0;
            }
        }
    }
    if (alg_a & SSL_aECDSA) {
        /* key usage, if present, must allow signing */
2279
        if (!(ex_kusage & X509v3_KU_DIGITAL_SIGNATURE)) {
2280 2281 2282 2283 2284 2285 2286 2287
            SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
                   SSL_R_ECC_CERT_NOT_FOR_SIGNING);
            return 0;
        }
    }

    return 1;                   /* all checks are ok */
}
B
Bodo Möller 已提交
2288

2289 2290
#endif

2291
static int ssl_get_server_cert_index(const SSL *s)
2292 2293 2294 2295 2296 2297 2298 2299 2300
{
    int idx;
    idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
    if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509)
        idx = SSL_PKEY_RSA_SIGN;
    if (idx == -1)
        SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX, ERR_R_INTERNAL_ERROR);
    return idx;
}
B
Ben Laurie 已提交
2301

2302
CERT_PKEY *ssl_get_server_send_pkey(SSL *s)
2303 2304 2305
{
    CERT *c;
    int i;
B
Bodo Möller 已提交
2306

2307 2308 2309
    c = s->cert;
    if (!s->s3 || !s->s3->tmp.new_cipher)
        return NULL;
2310
    ssl_set_masks(s, s->s3->tmp.new_cipher);
B
Ben Laurie 已提交
2311

2312
#ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2313 2314 2315 2316 2317 2318
    /*
     * Broken protocol test: return last used certificate: which may mismatch
     * the one expected.
     */
    if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
        return c->key;
2319 2320
#endif

2321
    i = ssl_get_server_cert_index(s);
B
Ben Laurie 已提交
2322

2323 2324 2325
    /* This may or may not be an error. */
    if (i < 0)
        return NULL;
B
Ben Laurie 已提交
2326

2327 2328 2329
    /* May be NULL. */
    return &c->pkeys[i];
}
2330

2331 2332 2333 2334 2335 2336
EVP_PKEY *ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *cipher,
                            const EVP_MD **pmd)
{
    unsigned long alg_a;
    CERT *c;
    int idx = -1;
2337

2338 2339
    alg_a = cipher->algorithm_auth;
    c = s->cert;
2340

2341
#ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366
    /*
     * Broken protocol test: use last key: which may mismatch the one
     * expected.
     */
    if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
        idx = c->key - c->pkeys;
    else
#endif

    if ((alg_a & SSL_aDSS) &&
            (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
        idx = SSL_PKEY_DSA_SIGN;
    else if (alg_a & SSL_aRSA) {
        if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
            idx = SSL_PKEY_RSA_SIGN;
        else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
            idx = SSL_PKEY_RSA_ENC;
    } else if ((alg_a & SSL_aECDSA) &&
               (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
        idx = SSL_PKEY_ECC;
    if (idx == -1) {
        SSLerr(SSL_F_SSL_GET_SIGN_PKEY, ERR_R_INTERNAL_ERROR);
        return (NULL);
    }
    if (pmd)
2367
        *pmd = s->s3->tmp.md[idx];
2368 2369
    return c->pkeys[idx].privatekey;
}
2370

2371
int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420
                                   size_t *serverinfo_length)
{
    CERT *c = NULL;
    int i = 0;
    *serverinfo_length = 0;

    c = s->cert;
    i = ssl_get_server_cert_index(s);

    if (i == -1)
        return 0;
    if (c->pkeys[i].serverinfo == NULL)
        return 0;

    *serverinfo = c->pkeys[i].serverinfo;
    *serverinfo_length = c->pkeys[i].serverinfo_length;
    return 1;
}

void ssl_update_cache(SSL *s, int mode)
{
    int i;

    /*
     * If the session_id_length is 0, we are not supposed to cache it, and it
     * would be rather hard to do anyway :-)
     */
    if (s->session->session_id_length == 0)
        return;

    i = s->session_ctx->session_cache_mode;
    if ((i & mode) && (!s->hit)
        && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
            || SSL_CTX_add_session(s->session_ctx, s->session))
        && (s->session_ctx->new_session_cb != NULL)) {
        CRYPTO_add(&s->session->references, 1, CRYPTO_LOCK_SSL_SESSION);
        if (!s->session_ctx->new_session_cb(s, s->session))
            SSL_SESSION_free(s->session);
    }

    /* auto flush every 255 connections */
    if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && ((i & mode) == mode)) {
        if ((((mode & SSL_SESS_CACHE_CLIENT)
              ? s->session_ctx->stats.sess_connect_good
              : s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff) {
            SSL_CTX_flush_sessions(s->session_ctx, (unsigned long)time(NULL));
        }
    }
}
2421

2422
const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx)
2423 2424 2425
{
    return ctx->method;
}
2426

2427
const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2428 2429 2430
{
    return (s->method);
}
2431

2432
int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524
{
    int conn = -1;
    int ret = 1;

    if (s->method != meth) {
        if (s->handshake_func != NULL)
            conn = (s->handshake_func == s->method->ssl_connect);

        if (s->method->version == meth->version)
            s->method = meth;
        else {
            s->method->ssl_free(s);
            s->method = meth;
            ret = s->method->ssl_new(s);
        }

        if (conn == 1)
            s->handshake_func = meth->ssl_connect;
        else if (conn == 0)
            s->handshake_func = meth->ssl_accept;
    }
    return (ret);
}

int SSL_get_error(const SSL *s, int i)
{
    int reason;
    unsigned long l;
    BIO *bio;

    if (i > 0)
        return (SSL_ERROR_NONE);

    /*
     * Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc,
     * where we do encode the error
     */
    if ((l = ERR_peek_error()) != 0) {
        if (ERR_GET_LIB(l) == ERR_LIB_SYS)
            return (SSL_ERROR_SYSCALL);
        else
            return (SSL_ERROR_SSL);
    }

    if ((i < 0) && SSL_want_read(s)) {
        bio = SSL_get_rbio(s);
        if (BIO_should_read(bio))
            return (SSL_ERROR_WANT_READ);
        else if (BIO_should_write(bio))
            /*
             * This one doesn't make too much sense ... We never try to write
             * to the rbio, and an application program where rbio and wbio
             * are separate couldn't even know what it should wait for.
             * However if we ever set s->rwstate incorrectly (so that we have
             * SSL_want_read(s) instead of SSL_want_write(s)) and rbio and
             * wbio *are* the same, this test works around that bug; so it
             * might be safer to keep it.
             */
            return (SSL_ERROR_WANT_WRITE);
        else if (BIO_should_io_special(bio)) {
            reason = BIO_get_retry_reason(bio);
            if (reason == BIO_RR_CONNECT)
                return (SSL_ERROR_WANT_CONNECT);
            else if (reason == BIO_RR_ACCEPT)
                return (SSL_ERROR_WANT_ACCEPT);
            else
                return (SSL_ERROR_SYSCALL); /* unknown */
        }
    }

    if ((i < 0) && SSL_want_write(s)) {
        bio = SSL_get_wbio(s);
        if (BIO_should_write(bio))
            return (SSL_ERROR_WANT_WRITE);
        else if (BIO_should_read(bio))
            /*
             * See above (SSL_want_read(s) with BIO_should_write(bio))
             */
            return (SSL_ERROR_WANT_READ);
        else if (BIO_should_io_special(bio)) {
            reason = BIO_get_retry_reason(bio);
            if (reason == BIO_RR_CONNECT)
                return (SSL_ERROR_WANT_CONNECT);
            else if (reason == BIO_RR_ACCEPT)
                return (SSL_ERROR_WANT_ACCEPT);
            else
                return (SSL_ERROR_SYSCALL);
        }
    }
    if ((i < 0) && SSL_want_x509_lookup(s)) {
        return (SSL_ERROR_WANT_X509_LOOKUP);
    }
M
Matt Caswell 已提交
2525 2526 2527
    if ((i < 0) && SSL_want_async(s)) {
        return SSL_ERROR_WANT_ASYNC;
    }
2528 2529 2530 2531 2532 2533 2534 2535

    if (i == 0) {
        if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
            (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
            return (SSL_ERROR_ZERO_RETURN);
    }
    return (SSL_ERROR_SYSCALL);
}
2536

2537
int SSL_do_handshake(SSL *s)
2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553
{
    int ret = 1;

    if (s->handshake_func == NULL) {
        SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET);
        return (-1);
    }

    s->method->ssl_renegotiate_check(s);

    if (SSL_in_init(s) || SSL_in_before(s)) {
        ret = s->handshake_func(s);
    }
    return (ret);
}

2554
void SSL_set_accept_state(SSL *s)
2555 2556 2557
{
    s->server = 1;
    s->shutdown = 0;
M
Matt Caswell 已提交
2558
    ossl_statem_clear(s);
2559
    s->handshake_func = s->method->ssl_accept;
R
Rich Salz 已提交
2560
    clear_ciphers(s);
2561
}
2562

2563
void SSL_set_connect_state(SSL *s)
2564 2565 2566
{
    s->server = 0;
    s->shutdown = 0;
M
Matt Caswell 已提交
2567
    ossl_statem_clear(s);
2568
    s->handshake_func = s->method->ssl_connect;
R
Rich Salz 已提交
2569
    clear_ciphers(s);
2570
}
2571

2572
int ssl_undefined_function(SSL *s)
2573 2574 2575 2576
{
    SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
    return (0);
}
2577

2578
int ssl_undefined_void_function(void)
2579 2580 2581 2582 2583
{
    SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,
           ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
    return (0);
}
2584

B
Ben Laurie 已提交
2585
int ssl_undefined_const_function(const SSL *s)
2586 2587 2588
{
    return (0);
}
B
Ben Laurie 已提交
2589

2590
SSL_METHOD *ssl_bad_method(int ver)
2591 2592 2593 2594
{
    SSLerr(SSL_F_SSL_BAD_METHOD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
    return (NULL);
}
2595

B
Ben Laurie 已提交
2596
const char *SSL_get_version(const SSL *s)
2597 2598 2599 2600 2601 2602 2603 2604 2605
{
    if (s->version == TLS1_2_VERSION)
        return ("TLSv1.2");
    else if (s->version == TLS1_1_VERSION)
        return ("TLSv1.1");
    else if (s->version == TLS1_VERSION)
        return ("TLSv1");
    else if (s->version == SSL3_VERSION)
        return ("SSLv3");
D
David Woodhouse 已提交
2606 2607 2608 2609 2610 2611
    else if (s->version == DTLS1_BAD_VER)
        return ("DTLSv0.9");
    else if (s->version == DTLS1_VERSION)
        return ("DTLSv1");
    else if (s->version == DTLS1_2_VERSION)
        return ("DTLSv1.2");
2612 2613 2614
    else
        return ("unknown");
}
2615

2616
SSL *SSL_dup(SSL *s)
2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630
{
    STACK_OF(X509_NAME) *sk;
    X509_NAME *xn;
    SSL *ret;
    int i;

    if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL)
        return (NULL);

    ret->version = s->version;
    ret->method = s->method;

    if (s->session != NULL) {
        /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
V
Viktor Dukhovni 已提交
2631
        if (!SSL_copy_session_id(ret, s))
M
Matt Caswell 已提交
2632
            goto err;
2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645
    } else {
        /*
         * No session has been established yet, so we have to expect that
         * s->cert or ret->cert will be changed later -- they should not both
         * point to the same object, and thus we can't use
         * SSL_copy_session_id.
         */

        ret->method->ssl_free(ret);
        ret->method = s->method;
        ret->method->ssl_new(ret);

        if (s->cert != NULL) {
R
Rich Salz 已提交
2646
            ssl_cert_free(ret->cert);
2647 2648 2649 2650 2651
            ret->cert = ssl_cert_dup(s->cert);
            if (ret->cert == NULL)
                goto err;
        }

V
Viktor Dukhovni 已提交
2652
        if (!SSL_set_session_id_context(ret, s->sid_ctx, s->sid_ctx_length))
M
Matt Caswell 已提交
2653
            goto err;
2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692
    }

    ret->options = s->options;
    ret->mode = s->mode;
    SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s));
    SSL_set_read_ahead(ret, SSL_get_read_ahead(s));
    ret->msg_callback = s->msg_callback;
    ret->msg_callback_arg = s->msg_callback_arg;
    SSL_set_verify(ret, SSL_get_verify_mode(s), SSL_get_verify_callback(s));
    SSL_set_verify_depth(ret, SSL_get_verify_depth(s));
    ret->generate_session_id = s->generate_session_id;

    SSL_set_info_callback(ret, SSL_get_info_callback(s));

    ret->debug = s->debug;

    /* copy app data, a little dangerous perhaps */
    if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
        goto err;

    /* setup rbio, and wbio */
    if (s->rbio != NULL) {
        if (!BIO_dup_state(s->rbio, (char *)&ret->rbio))
            goto err;
    }
    if (s->wbio != NULL) {
        if (s->wbio != s->rbio) {
            if (!BIO_dup_state(s->wbio, (char *)&ret->wbio))
                goto err;
        } else
            ret->wbio = ret->rbio;
    }
    ret->rwstate = s->rwstate;
    ret->handshake_func = s->handshake_func;
    ret->server = s->server;
    ret->renegotiate = s->renegotiate;
    ret->new_session = s->new_session;
    ret->quiet_shutdown = s->quiet_shutdown;
    ret->shutdown = s->shutdown;
M
Matt Caswell 已提交
2693 2694
    ret->statem = s->statem;      /* SSL_dup does not really work at any state,
                                   * though */
2695
    RECORD_LAYER_dup(&ret->rlayer, &s->rlayer);
2696 2697 2698 2699 2700
    ret->init_num = 0;          /* would have to copy ret->init_buf,
                                 * ret->init_msg, ret->init_num,
                                 * ret->init_off */
    ret->hit = s->hit;

M
Matt Caswell 已提交
2701 2702 2703
    ret->default_passwd_callback = s->default_passwd_callback;
    ret->default_passwd_callback_userdata = s->default_passwd_callback_userdata;

2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728
    X509_VERIFY_PARAM_inherit(ret->param, s->param);

    /* dup the cipher_list and cipher_list_by_id stacks */
    if (s->cipher_list != NULL) {
        if ((ret->cipher_list = sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
            goto err;
    }
    if (s->cipher_list_by_id != NULL)
        if ((ret->cipher_list_by_id = sk_SSL_CIPHER_dup(s->cipher_list_by_id))
            == NULL)
            goto err;

    /* Dup the client_CA list */
    if (s->client_CA != NULL) {
        if ((sk = sk_X509_NAME_dup(s->client_CA)) == NULL)
            goto err;
        ret->client_CA = sk;
        for (i = 0; i < sk_X509_NAME_num(sk); i++) {
            xn = sk_X509_NAME_value(sk, i);
            if (sk_X509_NAME_set(sk, i, X509_NAME_dup(xn)) == NULL) {
                X509_NAME_free(xn);
                goto err;
            }
        }
    }
R
Rich Salz 已提交
2729
    return ret;
2730 2731

 err:
R
Rich Salz 已提交
2732 2733
    SSL_free(ret);
    return NULL;
2734
}
2735

2736
void ssl_clear_cipher_ctx(SSL *s)
2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747
{
    if (s->enc_read_ctx != NULL) {
        EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
        OPENSSL_free(s->enc_read_ctx);
        s->enc_read_ctx = NULL;
    }
    if (s->enc_write_ctx != NULL) {
        EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
        OPENSSL_free(s->enc_write_ctx);
        s->enc_write_ctx = NULL;
    }
2748
#ifndef OPENSSL_NO_COMP
R
Rich Salz 已提交
2749 2750 2751 2752
    COMP_CTX_free(s->expand);
    s->expand = NULL;
    COMP_CTX_free(s->compress);
    s->compress = NULL;
2753 2754
#endif
}
2755

B
Ben Laurie 已提交
2756
X509 *SSL_get_certificate(const SSL *s)
2757 2758 2759 2760 2761 2762
{
    if (s->cert != NULL)
        return (s->cert->key->x509);
    else
        return (NULL);
}
2763

2764
EVP_PKEY *SSL_get_privatekey(const SSL *s)
2765 2766 2767 2768 2769 2770
{
    if (s->cert != NULL)
        return (s->cert->key->privatekey);
    else
        return (NULL);
}
2771

2772
X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
2773 2774 2775 2776 2777 2778
{
    if (ctx->cert != NULL)
        return ctx->cert->key->x509;
    else
        return NULL;
}
2779 2780

EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
2781 2782 2783 2784 2785 2786
{
    if (ctx->cert != NULL)
        return ctx->cert->key->privatekey;
    else
        return NULL;
}
2787

2788
const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2789 2790 2791 2792 2793 2794
{
    if ((s->session != NULL) && (s->session->cipher != NULL))
        return (s->session->cipher);
    return (NULL);
}

2795
const COMP_METHOD *SSL_get_current_compression(SSL *s)
2796
{
R
Rich Salz 已提交
2797 2798 2799 2800 2801
#ifndef OPENSSL_NO_COMP
    return s->compress ? COMP_CTX_get_method(s->compress) : NULL;
#else
    return NULL;
#endif
2802
}
2803 2804

const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2805
{
R
Rich Salz 已提交
2806 2807 2808 2809
#ifndef OPENSSL_NO_COMP
    return s->expand ? COMP_CTX_get_method(s->expand) : NULL;
#else
    return NULL;
2810
#endif
R
Rich Salz 已提交
2811
}
2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841

int ssl_init_wbio_buffer(SSL *s, int push)
{
    BIO *bbio;

    if (s->bbio == NULL) {
        bbio = BIO_new(BIO_f_buffer());
        if (bbio == NULL)
            return (0);
        s->bbio = bbio;
    } else {
        bbio = s->bbio;
        if (s->bbio == s->wbio)
            s->wbio = BIO_pop(s->wbio);
    }
    (void)BIO_reset(bbio);
/*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
    if (!BIO_set_read_buffer_size(bbio, 1)) {
        SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB);
        return (0);
    }
    if (push) {
        if (s->wbio != bbio)
            s->wbio = BIO_push(bbio, s->wbio);
    } else {
        if (s->wbio == bbio)
            s->wbio = BIO_pop(bbio);
    }
    return (1);
}
2842

2843
void ssl_free_wbio_buffer(SSL *s)
2844
{
R
Rich Salz 已提交
2845
    /* callers ensure s is never null */
2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864
    if (s->bbio == NULL)
        return;

    if (s->bbio == s->wbio) {
        /* remove buffering */
        s->wbio = BIO_pop(s->wbio);
#ifdef REF_CHECK                /* not the usual REF_CHECK, but this avoids
                                 * adding one more preprocessor symbol */
        assert(s->wbio != NULL);
#endif
    }
    BIO_free(s->bbio);
    s->bbio = NULL;
}

void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode)
{
    ctx->quiet_shutdown = mode;
}
2865

B
Ben Laurie 已提交
2866
int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2867 2868 2869
{
    return (ctx->quiet_shutdown);
}
2870

2871 2872 2873 2874
void SSL_set_quiet_shutdown(SSL *s, int mode)
{
    s->quiet_shutdown = mode;
}
2875

B
Ben Laurie 已提交
2876
int SSL_get_quiet_shutdown(const SSL *s)
2877 2878 2879
{
    return (s->quiet_shutdown);
}
2880

2881 2882 2883 2884
void SSL_set_shutdown(SSL *s, int mode)
{
    s->shutdown = mode;
}
2885

B
Ben Laurie 已提交
2886
int SSL_get_shutdown(const SSL *s)
2887 2888 2889
{
    return (s->shutdown);
}
2890

B
Ben Laurie 已提交
2891
int SSL_version(const SSL *s)
2892 2893 2894
{
    return (s->version);
}
2895

B
Ben Laurie 已提交
2896
SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2897 2898 2899 2900 2901 2902
{
    return (ssl->ctx);
}

SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx)
{
K
Kurt Roeckx 已提交
2903
    CERT *new_cert;
2904 2905 2906 2907
    if (ssl->ctx == ctx)
        return ssl->ctx;
    if (ctx == NULL)
        ctx = ssl->initial_ctx;
K
Kurt Roeckx 已提交
2908 2909 2910
    new_cert = ssl_cert_dup(ctx->cert);
    if (new_cert == NULL) {
        return NULL;
2911
    }
K
Kurt Roeckx 已提交
2912 2913
    ssl_cert_free(ssl->cert);
    ssl->cert = new_cert;
2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934

    /*
     * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH),
     * so setter APIs must prevent invalid lengths from entering the system.
     */
    OPENSSL_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx));

    /*
     * If the session ID context matches that of the parent SSL_CTX,
     * inherit it from the new SSL_CTX as well. If however the context does
     * not match (i.e., it was set per-ssl with SSL_set_session_id_context),
     * leave it unchanged.
     */
    if ((ssl->ctx != NULL) &&
        (ssl->sid_ctx_length == ssl->ctx->sid_ctx_length) &&
        (memcmp(ssl->sid_ctx, ssl->ctx->sid_ctx, ssl->sid_ctx_length) == 0)) {
        ssl->sid_ctx_length = ctx->sid_ctx_length;
        memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx));
    }

    CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
R
Rich Salz 已提交
2935
    SSL_CTX_free(ssl->ctx); /* decrement reference count */
2936 2937 2938 2939
    ssl->ctx = ctx;

    return (ssl->ctx);
}
2940

2941
int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2942 2943 2944
{
    return (X509_STORE_set_default_paths(ctx->cert_store));
}
2945

2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976
int SSL_CTX_set_default_verify_dir(SSL_CTX *ctx)
{
    X509_LOOKUP *lookup;

    lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_hash_dir());
    if (lookup == NULL)
        return 0;
    X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);

    /* Clear any errors if the default directory does not exist */
    ERR_clear_error();

    return 1;
}

int SSL_CTX_set_default_verify_file(SSL_CTX *ctx)
{
    X509_LOOKUP *lookup;

    lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_file());
    if (lookup == NULL)
        return 0;

    X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);

    /* Clear any errors if the default file does not exist */
    ERR_clear_error();

    return 1;
}

2977
int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2978 2979 2980 2981
                                  const char *CApath)
{
    return (X509_STORE_load_locations(ctx->cert_store, CAfile, CApath));
}
2982

B
Ben Laurie 已提交
2983
void SSL_set_info_callback(SSL *ssl,
2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997
                           void (*cb) (const SSL *ssl, int type, int val))
{
    ssl->info_callback = cb;
}

/*
 * One compiler (Diab DCC) doesn't like argument names in returned function
 * pointer.
 */
void (*SSL_get_info_callback(const SSL *ssl)) (const SSL * /* ssl */ ,
                                               int /* type */ ,
                                               int /* val */ ) {
    return ssl->info_callback;
}
2998

2999 3000 3001 3002
void SSL_set_verify_result(SSL *ssl, long arg)
{
    ssl->verify_result = arg;
}
3003

B
Ben Laurie 已提交
3004
long SSL_get_verify_result(const SSL *ssl)
3005 3006 3007 3008
{
    return (ssl->verify_result);
}

3009
size_t SSL_get_client_random(const SSL *ssl, unsigned char *out, size_t outlen)
3010
{
3011
    if (outlen == 0)
3012 3013 3014 3015
        return sizeof(ssl->s3->client_random);
    if (outlen > sizeof(ssl->s3->client_random))
        outlen = sizeof(ssl->s3->client_random);
    memcpy(out, ssl->s3->client_random, outlen);
3016
    return outlen;
3017 3018
}

3019
size_t SSL_get_server_random(const SSL *ssl, unsigned char *out, size_t outlen)
3020
{
3021
    if (outlen == 0)
3022 3023 3024 3025
        return sizeof(ssl->s3->server_random);
    if (outlen > sizeof(ssl->s3->server_random))
        outlen = sizeof(ssl->s3->server_random);
    memcpy(out, ssl->s3->server_random, outlen);
3026
    return outlen;
3027 3028
}

3029
size_t SSL_SESSION_get_master_key(const SSL_SESSION *session,
3030
                               unsigned char *out, size_t outlen)
3031
{
3032 3033 3034 3035
    if (session->master_key_length < 0) {
        /* Should never happen */
        return 0;
    }
3036 3037
    if (outlen == 0)
        return session->master_key_length;
3038
    if (outlen > (size_t)session->master_key_length)
3039 3040
        outlen = session->master_key_length;
    memcpy(out, session->master_key, outlen);
3041
    return outlen;
3042 3043
}

3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077
int SSL_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
                         CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
{
    return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
                                   new_func, dup_func, free_func);
}

int SSL_set_ex_data(SSL *s, int idx, void *arg)
{
    return (CRYPTO_set_ex_data(&s->ex_data, idx, arg));
}

void *SSL_get_ex_data(const SSL *s, int idx)
{
    return (CRYPTO_get_ex_data(&s->ex_data, idx));
}

int SSL_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
                             CRYPTO_EX_dup *dup_func,
                             CRYPTO_EX_free *free_func)
{
    return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
                                   new_func, dup_func, free_func);
}

int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)
{
    return (CRYPTO_set_ex_data(&s->ex_data, idx, arg));
}

void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx)
{
    return (CRYPTO_get_ex_data(&s->ex_data, idx));
}
3078

3079
int ssl_ok(SSL *s)
3080 3081 3082
{
    return (1);
}
3083

B
Ben Laurie 已提交
3084
X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3085 3086 3087
{
    return (ctx->cert_store);
}
3088

3089 3090
void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store)
{
R
Rich Salz 已提交
3091
    X509_STORE_free(ctx->cert_store);
3092 3093
    ctx->cert_store = store;
}
3094

B
Ben Laurie 已提交
3095
int SSL_want(const SSL *s)
3096 3097 3098
{
    return (s->rwstate);
}
3099

3100
/**
3101 3102 3103 3104 3105
 * \brief Set the callback for generating temporary RSA keys.
 * \param ctx the SSL context.
 * \param cb the callback
 */

3106
#ifndef OPENSSL_NO_RSA
3107 3108 3109 3110 3111 3112
void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx, RSA *(*cb) (SSL *ssl,
                                                            int is_export,
                                                            int keylength))
{
    SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_RSA_CB, (void (*)(void))cb);
}
3113

3114 3115 3116 3117 3118 3119
void SSL_set_tmp_rsa_callback(SSL *ssl, RSA *(*cb) (SSL *ssl,
                                                    int is_export,
                                                    int keylength))
{
    SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_RSA_CB, (void (*)(void))cb);
}
3120
#endif
3121

3122
#ifdef DOXYGEN
3123
/**
3124 3125
 * \brief The RSA temporary key callback function.
 * \param ssl the SSL session.
U
Ulf Möller 已提交
3126 3127 3128
 * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
 * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
 * of the required key in bits.
3129 3130 3131 3132
 * \return the temporary RSA key.
 * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
 */

3133 3134 3135
RSA *cb(SSL *ssl, int is_export, int keylength)
{
}
3136 3137
#endif

3138
/**
3139 3140 3141 3142 3143
 * \brief Set the callback for generating temporary DH keys.
 * \param ctx the SSL context.
 * \param dh the callback
 */

3144
#ifndef OPENSSL_NO_DH
3145 3146 3147 3148 3149 3150
void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,
                                 DH *(*dh) (SSL *ssl, int is_export,
                                            int keylength))
{
    SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh);
}
3151

3152 3153 3154 3155 3156
void SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh) (SSL *ssl, int is_export,
                                                  int keylength))
{
    SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh);
}
3157
#endif
3158

3159
#ifndef OPENSSL_NO_EC
3160 3161 3162 3163 3164 3165 3166
void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,
                                   EC_KEY *(*ecdh) (SSL *ssl, int is_export,
                                                    int keylength))
{
    SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_ECDH_CB,
                          (void (*)(void))ecdh);
}
B
Bodo Möller 已提交
3167

3168 3169 3170 3171 3172 3173
void SSL_set_tmp_ecdh_callback(SSL *ssl,
                               EC_KEY *(*ecdh) (SSL *ssl, int is_export,
                                                int keylength))
{
    SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_ECDH_CB, (void (*)(void))ecdh);
}
B
Bodo Möller 已提交
3174 3175
#endif

3176 3177
#ifndef OPENSSL_NO_PSK
int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3178 3179 3180 3181 3182 3183
{
    if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
        SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT,
               SSL_R_DATA_LENGTH_TOO_LONG);
        return 0;
    }
3184
    OPENSSL_free(ctx->cert->psk_identity_hint);
3185
    if (identity_hint != NULL) {
3186 3187
        ctx->cert->psk_identity_hint = BUF_strdup(identity_hint);
        if (ctx->cert->psk_identity_hint == NULL)
3188 3189
            return 0;
    } else
3190
        ctx->cert->psk_identity_hint = NULL;
3191 3192
    return 1;
}
3193 3194

int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3195 3196 3197 3198 3199 3200 3201 3202
{
    if (s == NULL)
        return 0;

    if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
        SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
        return 0;
    }
3203
    OPENSSL_free(s->cert->psk_identity_hint);
3204
    if (identity_hint != NULL) {
3205 3206
        s->cert->psk_identity_hint = BUF_strdup(identity_hint);
        if (s->cert->psk_identity_hint == NULL)
3207 3208
            return 0;
    } else
3209
        s->cert->psk_identity_hint = NULL;
3210 3211
    return 1;
}
3212 3213

const char *SSL_get_psk_identity_hint(const SSL *s)
3214 3215 3216 3217 3218
{
    if (s == NULL || s->session == NULL)
        return NULL;
    return (s->session->psk_identity_hint);
}
3219 3220

const char *SSL_get_psk_identity(const SSL *s)
3221 3222 3223 3224 3225
{
    if (s == NULL || s->session == NULL)
        return NULL;
    return (s->session->psk_identity);
}
N
Nils Larsch 已提交
3226

3227
void SSL_set_psk_client_callback(SSL *s,
3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238
                                 unsigned int (*cb) (SSL *ssl,
                                                     const char *hint,
                                                     char *identity,
                                                     unsigned int
                                                     max_identity_len,
                                                     unsigned char *psk,
                                                     unsigned int
                                                     max_psk_len))
{
    s->psk_client_callback = cb;
}
N
Nils Larsch 已提交
3239 3240

void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251
                                     unsigned int (*cb) (SSL *ssl,
                                                         const char *hint,
                                                         char *identity,
                                                         unsigned int
                                                         max_identity_len,
                                                         unsigned char *psk,
                                                         unsigned int
                                                         max_psk_len))
{
    ctx->psk_client_callback = cb;
}
N
Nils Larsch 已提交
3252

3253
void SSL_set_psk_server_callback(SSL *s,
3254 3255 3256 3257 3258 3259 3260 3261
                                 unsigned int (*cb) (SSL *ssl,
                                                     const char *identity,
                                                     unsigned char *psk,
                                                     unsigned int
                                                     max_psk_len))
{
    s->psk_server_callback = cb;
}
N
Nils Larsch 已提交
3262 3263

void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288
                                     unsigned int (*cb) (SSL *ssl,
                                                         const char *identity,
                                                         unsigned char *psk,
                                                         unsigned int
                                                         max_psk_len))
{
    ctx->psk_server_callback = cb;
}
#endif

void SSL_CTX_set_msg_callback(SSL_CTX *ctx,
                              void (*cb) (int write_p, int version,
                                          int content_type, const void *buf,
                                          size_t len, SSL *ssl, void *arg))
{
    SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
}

void SSL_set_msg_callback(SSL *ssl,
                          void (*cb) (int write_p, int version,
                                      int content_type, const void *buf,
                                      size_t len, SSL *ssl, void *arg))
{
    SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
}
3289

3290
void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
3291 3292 3293 3294 3295 3296 3297 3298
                                                int (*cb) (SSL *ssl,
                                                           int
                                                           is_forward_secure))
{
    SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
                          (void (*)(void))cb);
}

3299
void SSL_set_not_resumable_session_callback(SSL *ssl,
3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311
                                            int (*cb) (SSL *ssl,
                                                       int is_forward_secure))
{
    SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
                      (void (*)(void))cb);
}

/*
 * Allocates new EVP_MD_CTX and sets pointer to it into given pointer
 * vairable, freeing EVP_MD_CTX previously stored in that variable, if any.
 * If EVP_MD pointer is passed, initializes ctx with this md Returns newly
 * allocated ctx;
B
Ben Laurie 已提交
3312
 */
3313

3314
EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)
3315
{
3316 3317
    ssl_clear_hash_ctx(hash);
    *hash = EVP_MD_CTX_create();
3318 3319 3320 3321 3322
    if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
        EVP_MD_CTX_destroy(*hash);
        *hash = NULL;
        return NULL;
    }
3323
    return *hash;
3324
}
3325 3326

void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3327 3328
{

3329 3330 3331
    if (*hash)
        EVP_MD_CTX_destroy(*hash);
    *hash = NULL;
3332
}
3333

3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362
/* Retrieve handshake hashes */
int ssl_handshake_hash(SSL *s, unsigned char *out, int outlen)
{
    unsigned char *p = out;
    int idx, ret = 0;
    long mask;
    EVP_MD_CTX ctx;
    const EVP_MD *md;
    EVP_MD_CTX_init(&ctx);
    for (idx = 0; ssl_get_handshake_digest(idx, &mask, &md); idx++) {
        if (mask & ssl_get_algorithm2(s)) {
            int hashsize = EVP_MD_size(md);
            EVP_MD_CTX *hdgst = s->s3->handshake_dgst[idx];
            if (!hdgst || hashsize < 0 || hashsize > outlen)
                goto err;
            if (!EVP_MD_CTX_copy_ex(&ctx, hdgst))
                goto err;
            if (!EVP_DigestFinal_ex(&ctx, p, NULL))
                goto err;
            p += hashsize;
            outlen -= hashsize;
        }
    }
    ret = p - out;
 err:
    EVP_MD_CTX_cleanup(&ctx);
    return ret;
}

3363
void SSL_set_debug(SSL *s, int debug)
3364 3365 3366
{
    s->debug = debug;
}
3367 3368

int SSL_cache_hit(SSL *s)
3369 3370 3371
{
    return s->hit;
}
3372

3373
int SSL_is_server(SSL *s)
3374 3375 3376
{
    return s->server;
}
3377

D
Dr. Stephen Henson 已提交
3378
void SSL_set_security_level(SSL *s, int level)
3379 3380 3381
{
    s->cert->sec_level = level;
}
D
Dr. Stephen Henson 已提交
3382 3383

int SSL_get_security_level(const SSL *s)
3384 3385 3386
{
    return s->cert->sec_level;
}
D
Dr. Stephen Henson 已提交
3387

3388 3389 3390 3391 3392 3393 3394
void SSL_set_security_callback(SSL *s,
                               int (*cb) (SSL *s, SSL_CTX *ctx, int op,
                                          int bits, int nid, void *other,
                                          void *ex))
{
    s->cert->sec_cb = cb;
}
D
Dr. Stephen Henson 已提交
3395

3396 3397 3398 3399 3400
int (*SSL_get_security_callback(const SSL *s)) (SSL *s, SSL_CTX *ctx, int op,
                                                int bits, int nid,
                                                void *other, void *ex) {
    return s->cert->sec_cb;
}
D
Dr. Stephen Henson 已提交
3401 3402

void SSL_set0_security_ex_data(SSL *s, void *ex)
3403 3404 3405
{
    s->cert->sec_ex = ex;
}
D
Dr. Stephen Henson 已提交
3406 3407

void *SSL_get0_security_ex_data(const SSL *s)
3408 3409 3410
{
    return s->cert->sec_ex;
}
D
Dr. Stephen Henson 已提交
3411 3412

void SSL_CTX_set_security_level(SSL_CTX *ctx, int level)
3413 3414 3415
{
    ctx->cert->sec_level = level;
}
D
Dr. Stephen Henson 已提交
3416 3417

int SSL_CTX_get_security_level(const SSL_CTX *ctx)
3418 3419 3420
{
    return ctx->cert->sec_level;
}
D
Dr. Stephen Henson 已提交
3421

3422 3423 3424 3425 3426 3427 3428
void SSL_CTX_set_security_callback(SSL_CTX *ctx,
                                   int (*cb) (SSL *s, SSL_CTX *ctx, int op,
                                              int bits, int nid, void *other,
                                              void *ex))
{
    ctx->cert->sec_cb = cb;
}
D
Dr. Stephen Henson 已提交
3429

3430 3431 3432 3433 3434 3435 3436 3437
int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx)) (SSL *s,
                                                          SSL_CTX *ctx,
                                                          int op, int bits,
                                                          int nid,
                                                          void *other,
                                                          void *ex) {
    return ctx->cert->sec_cb;
}
D
Dr. Stephen Henson 已提交
3438 3439

void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex)
3440 3441 3442
{
    ctx->cert->sec_ex = ex;
}
D
Dr. Stephen Henson 已提交
3443 3444

void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx)
3445 3446 3447
{
    return ctx->cert->sec_ex;
}
D
Dr. Stephen Henson 已提交
3448

3449
IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id);