ssl_lib.c 39.6 KB
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/*! \file ssl/ssl_lib.c
 *  \brief Version independent SSL functions.
 */
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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.
 * 
 * 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).
 * 
 * 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.
 * 
 * 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 :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * 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.
 * 
 * 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.]
 */

#include <stdio.h>
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#include <openssl/objects.h>
#include <openssl/lhash.h>
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#include "ssl_locl.h"

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char *SSL_version_str=OPENSSL_VERSION_TEXT;
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static STACK *ssl_meth=NULL;
static STACK *ssl_ctx_meth=NULL;
static int ssl_meth_num=0;
static int ssl_ctx_meth_num=0;
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SSL3_ENC_METHOD ssl3_undef_enc_method={
	ssl_undefined_function,
	ssl_undefined_function,
	ssl_undefined_function,
	ssl_undefined_function,
	ssl_undefined_function,
	ssl_undefined_function,
	};
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int SSL_clear(SSL *s)
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	{
	int state;

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	if (s->method == NULL)
		{
		SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
		return(0);
		}
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	s->error=0;
	s->hit=0;
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	s->shutdown=0;
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#if 0
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	/* This is set if we are doing dynamic renegotiation so keep
	 * the old cipher.  It is sort of a SSL_clear_lite :-) */
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	if (s->new_session) return(1);
#endif
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	state=s->state; /* Keep to check if we throw away the session-id */
	s->type=0;

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	s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);

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	s->version=s->method->version;
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	s->client_version=s->version;
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	s->rwstate=SSL_NOTHING;
	s->rstate=SSL_ST_READ_HEADER;
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	s->read_ahead=s->ctx->read_ahead;
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	if (s->init_buf != NULL)
		{
		BUF_MEM_free(s->init_buf);
		s->init_buf=NULL;
		}

	ssl_clear_cipher_ctx(s);

	if (ssl_clear_bad_session(s))
		{
		SSL_SESSION_free(s->session);
		s->session=NULL;
		}

	s->first_packet=0;

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#if 1
	/* Check to see if we were changed into a different method, if
	 * so, revert back if we are not doing session-id reuse. */
	if ((s->session == NULL) && (s->method != s->ctx->method))
		{
		s->method->ssl_free(s);
		s->method=s->ctx->method;
		if (!s->method->ssl_new(s))
			return(0);
		}
	else
#endif
		s->method->ssl_clear(s);
	return(1);
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	}

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/** Used to change an SSL_CTXs default SSL method type */
int SSL_CTX_set_ssl_version(SSL_CTX *ctx,SSL_METHOD *meth)
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	{
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	STACK_OF(SSL_CIPHER) *sk;
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	ctx->method=meth;

	sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
		&(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
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	if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
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		{
		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);
		}

	s=(SSL *)Malloc(sizeof(SSL));
	if (s == NULL) goto err;
	memset(s,0,sizeof(SSL));

	if (ctx->default_cert != NULL)
		{
		CRYPTO_add(&ctx->default_cert->references,1,
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			   CRYPTO_LOCK_SSL_CERT);
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		s->cert=ctx->default_cert;
		}
	else
		s->cert=NULL;
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	s->verify_mode=ctx->verify_mode;
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	s->verify_callback=ctx->default_verify_callback;
	CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
	s->ctx=ctx;

	s->verify_result=X509_V_OK;

	s->method=ctx->method;

	if (!s->method->ssl_new(s))
		{
		SSL_CTX_free(ctx);
		Free(s);
		goto err;
		}

	s->quiet_shutdown=ctx->quiet_shutdown;
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	s->references=1;
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	s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
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	s->options=ctx->options;
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	SSL_clear(s);
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	CRYPTO_new_ex_data(ssl_meth,(char *)s,&s->ex_data);

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	return(s);
err:
	SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
	return(NULL);
	}

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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);

    return 1;
    }

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void SSL_free(SSL *s)
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	{
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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);
#ifdef REF_PRINT
	REF_PRINT("SSL",s);
#endif
	if (i > 0) return;
#ifdef REF_CHECK
	if (i < 0)
		{
		fprintf(stderr,"SSL_free, bad reference count\n");
		abort(); /* ok */
		}
#endif

	CRYPTO_free_ex_data(ssl_meth,(char *)s,&s->ex_data);

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	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);
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		s->bbio=NULL;
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		}
	if (s->rbio != NULL)
		BIO_free_all(s->rbio);
	if ((s->wbio != NULL) && (s->wbio != s->rbio))
		BIO_free_all(s->wbio);

	if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);

	/* add extra stuff */
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	if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
	if (s->cipher_list_by_id != NULL) 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);
		}

	ssl_clear_cipher_ctx(s);

	if (s->cert != NULL) ssl_cert_free(s->cert);
	/* Free up if allocated */

	if (s->ctx) SSL_CTX_free(s->ctx);

	if (s->client_CA != NULL)
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		sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
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	if (s->method != NULL) s->method->ssl_free(s);

	Free((char *)s);
	}

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void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
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	{
	/* 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;
			}
		}
	if ((s->rbio != NULL) && (s->rbio != rbio))
		BIO_free_all(s->rbio);
	if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
		BIO_free_all(s->wbio);
	s->rbio=rbio;
	s->wbio=wbio;
	}

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BIO *SSL_get_rbio(SSL *s)
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	{ return(s->rbio); }

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BIO *SSL_get_wbio(SSL *s)
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	{ return(s->wbio); }

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int SSL_get_fd(SSL *s)
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	{
	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);
	}

#ifndef NO_SOCK
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int SSL_set_fd(SSL *s,int fd)
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	{
	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);
	}

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

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	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());
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		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));
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	ret=1;
err:
	return(ret);
	}

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

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	if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
		|| ((int)BIO_get_fd(s->wbio,NULL) != fd))
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		{
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		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));
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		}
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	else
		SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
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	ret=1;
err:
	return(ret);
	}
#endif

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int SSL_get_verify_mode(SSL *s)
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	{
	return(s->verify_mode);
	}

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int (*SSL_get_verify_callback(SSL *s))(int,X509_STORE_CTX *)
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	{
	return(s->verify_callback);
	}

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int SSL_CTX_get_verify_mode(SSL_CTX *ctx)
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	{
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	return(ctx->verify_mode);
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	}

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

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

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void SSL_set_read_ahead(SSL *s,int yes)
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	{
	s->read_ahead=yes;
	}

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int SSL_get_read_ahead(SSL *s)
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	{
	return(s->read_ahead);
	}

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int SSL_pending(SSL *s)
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	{
	return(s->method->ssl_pending(s));
	}

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X509 *SSL_get_peer_certificate(SSL *s)
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	{
	X509 *r;
	
	if ((s == NULL) || (s->session == NULL))
		r=NULL;
	else
		r=s->session->peer;

	if (r == NULL) return(r);

	CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);

	return(r);
	}

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STACK_OF(X509) *SSL_get_peer_cert_chain(SSL *s)
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	{
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	STACK_OF(X509) *r;
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	if ((s == NULL) || (s->session == NULL) || (s->session->cert == NULL))
		r=NULL;
	else
		r=s->session->cert->cert_chain;

	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 */
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void SSL_copy_session_id(SSL *t,SSL *f)
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	{
	CERT *tmp;

	/* Do we need to to SSL locking? */
	SSL_set_session(t,SSL_get_session(f));

	/* what if we are setup as SSLv2 but want to talk SSLv3 or
	 * vice-versa */
	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 */
		}

	tmp=t->cert;
	if (f->cert != NULL)
		{
		CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
		t->cert=f->cert;
		}
	else
		t->cert=NULL;
	if (tmp != NULL) ssl_cert_free(tmp);
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	SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
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	}

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/* Fix this so it checks all the valid key/cert options */
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int SSL_CTX_check_private_key(SSL_CTX *ctx)
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	{
	if (	(ctx == NULL) ||
		(ctx->default_cert == NULL) ||
		(ctx->default_cert->key->x509 == NULL))
		{
		SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
		return(0);
		}
	if 	(ctx->default_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->default_cert->key->x509, ctx->default_cert->key->privatekey));
	}

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/* Fix this function so that it takes an optional type parameter */
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int SSL_check_private_key(SSL *ssl)
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	{
	if (ssl == NULL)
		{
		SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
		return(0);
		}
	if (ssl->cert == NULL)
		return(SSL_CTX_check_private_key(ssl->ctx));
	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));
	}

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int SSL_accept(SSL *s)
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	{
	return(s->method->ssl_accept(s));
	}

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int SSL_connect(SSL *s)
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	{
	return(s->method->ssl_connect(s));
	}

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long SSL_get_default_timeout(SSL *s)
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	{
	return(s->method->get_timeout());
	}

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int SSL_read(SSL *s,char *buf,int num)
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	{
	if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
		{
		s->rwstate=SSL_NOTHING;
		return(0);
		}
	return(s->method->ssl_read(s,buf,num));
	}

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int SSL_peek(SSL *s,char *buf,int num)
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	{
	if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
		{
		return(0);
		}
	return(s->method->ssl_peek(s,buf,num));
	}

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int SSL_write(SSL *s,const char *buf,int num)
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	{
	if (s->shutdown & SSL_SENT_SHUTDOWN)
		{
		s->rwstate=SSL_NOTHING;
		SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
		return(-1);
		}
	return(s->method->ssl_write(s,buf,num));
	}

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int SSL_shutdown(SSL *s)
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	{
	if ((s != NULL) && !SSL_in_init(s))
		return(s->method->ssl_shutdown(s));
	else
		return(1);
	}

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int SSL_renegotiate(SSL *s)
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	{
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	s->new_session=1;
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	return(s->method->ssl_renegotiate(s));
	}

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

	switch (cmd)
		{
	case SSL_CTRL_GET_READ_AHEAD:
		return(s->read_ahead);
	case SSL_CTRL_SET_READ_AHEAD:
		l=s->read_ahead;
		s->read_ahead=larg;
		return(l);
	case SSL_CTRL_OPTIONS:
		return(s->options|=larg);
	default:
		return(s->method->ssl_ctrl(s,cmd,larg,parg));
		}
	return(0);
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	}

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long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,char *parg)
627
	{
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	long l;

	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_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(ctx->sessions->num_items);
	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);
	default:
		return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
		}
	return(0);
682 683
	}

684
int ssl_cipher_id_cmp(SSL_CIPHER *a,SSL_CIPHER *b)
685 686 687 688 689 690 691 692 693 694
	{
	long l;

	l=a->id-b->id;
	if (l == 0L)
		return(0);
	else
		return((l > 0)?1:-1);
	}

695
int ssl_cipher_ptr_id_cmp(SSL_CIPHER **ap,SSL_CIPHER **bp)
696 697 698 699 700 701 702 703 704 705
	{
	long l;

	l=(*ap)->id-(*bp)->id;
	if (l == 0L)
		return(0);
	else
		return((l > 0)?1:-1);
	}

706
/** return a STACK of the ciphers available for the SSL and in order of
707
 * preference */
B
Ben Laurie 已提交
708
STACK_OF(SSL_CIPHER) *SSL_get_ciphers(SSL *s)
709 710 711 712 713
	{
	if ((s != NULL) && (s->cipher_list != NULL))
		{
		return(s->cipher_list);
		}
714
	else if ((s->ctx != NULL) &&
715 716 717 718 719 720 721
		(s->ctx->cipher_list != NULL))
		{
		return(s->ctx->cipher_list);
		}
	return(NULL);
	}

722
/** return a STACK of the ciphers available for the SSL and in order of
723
 * algorithm id */
B
Ben Laurie 已提交
724
STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
725 726 727 728 729 730 731 732 733 734 735 736 737
	{
	if ((s != NULL) && (s->cipher_list_by_id != NULL))
		{
		return(s->cipher_list_by_id);
		}
	else if ((s != NULL) && (s->ctx != NULL) &&
		(s->ctx->cipher_list_by_id != NULL))
		{
		return(s->ctx->cipher_list_by_id);
		}
	return(NULL);
	}

738
/** The old interface to get the same thing as SSL_get_ciphers() */
B
Ben Laurie 已提交
739
const char *SSL_get_cipher_list(SSL *s,int n)
740 741
	{
	SSL_CIPHER *c;
B
Ben Laurie 已提交
742
	STACK_OF(SSL_CIPHER) *sk;
743 744 745

	if (s == NULL) return(NULL);
	sk=SSL_get_ciphers(s);
B
Ben Laurie 已提交
746
	if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
747
		return(NULL);
B
Ben Laurie 已提交
748
	c=sk_SSL_CIPHER_value(sk,n);
749 750 751 752
	if (c == NULL) return(NULL);
	return(c->name);
	}

753 754
/** specify the ciphers to be used by defaut by the SSL_CTX */
int SSL_CTX_set_cipher_list(SSL_CTX *ctx,char *str)
755
	{
B
Ben Laurie 已提交
756
	STACK_OF(SSL_CIPHER) *sk;
757 758 759 760 761 762 763
	
	sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
		&ctx->cipher_list_by_id,str);
/* XXXX */
	return((sk == NULL)?0:1);
	}

764 765
/** specify the ciphers to be used by the SSL */
int SSL_set_cipher_list(SSL *s,char *str)
766
	{
B
Ben Laurie 已提交
767
	STACK_OF(SSL_CIPHER) *sk;
768 769 770 771 772 773 774 775
	
	sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
		&s->cipher_list_by_id,str);
/* XXXX */
	return((sk == NULL)?0:1);
	}

/* works well for SSLv2, not so good for SSLv3 */
776
char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
777
	{
B
Ben Laurie 已提交
778 779
	char *p;
	const char *cp;
B
Ben Laurie 已提交
780
	STACK_OF(SSL_CIPHER) *sk;
781 782 783 784 785 786 787 788 789
	SSL_CIPHER *c;
	int i;

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

	p=buf;
	sk=s->session->ciphers;
B
Ben Laurie 已提交
790
	for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
791
		{
792 793
		/* Decrement for either the ':' or a '\0' */
		len--;
B
Ben Laurie 已提交
794
		c=sk_SSL_CIPHER_value(sk,i);
795 796
		for (cp=c->name; *cp; )
			{
797
			if (len-- == 0)
798 799 800 801 802 803 804 805 806 807 808 809 810
				{
				*p='\0';
				return(buf);
				}
			else
				*(p++)= *(cp++);
			}
		*(p++)=':';
		}
	p[-1]='\0';
	return(buf);
	}

B
Ben Laurie 已提交
811
int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p)
812 813 814 815 816 817 818 819
	{
	int i,j=0;
	SSL_CIPHER *c;
	unsigned char *q;

	if (sk == NULL) return(0);
	q=p;

B
Ben Laurie 已提交
820
	for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
821
		{
B
Ben Laurie 已提交
822
		c=sk_SSL_CIPHER_value(sk,i);
823 824 825 826 827 828
		j=ssl_put_cipher_by_char(s,c,p);
		p+=j;
		}
	return(p-q);
	}

B
Ben Laurie 已提交
829 830
STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
					       STACK_OF(SSL_CIPHER) **skp)
831 832
	{
	SSL_CIPHER *c;
B
Ben Laurie 已提交
833
	STACK_OF(SSL_CIPHER) *sk;
834 835 836 837 838 839 840 841 842
	int i,n;

	n=ssl_put_cipher_by_char(s,NULL,NULL);
	if ((num%n) != 0)
		{
		SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
		return(NULL);
		}
	if ((skp == NULL) || (*skp == NULL))
B
Ben Laurie 已提交
843
		sk=sk_SSL_CIPHER_new(NULL); /* change perhaps later */
844 845 846
	else
		{
		sk= *skp;
B
Ben Laurie 已提交
847
		sk_SSL_CIPHER_zero(sk);
848 849 850 851 852 853 854 855
		}

	for (i=0; i<num; i+=n)
		{
		c=ssl_get_cipher_by_char(s,p);
		p+=n;
		if (c != NULL)
			{
B
Ben Laurie 已提交
856
			if (!sk_SSL_CIPHER_push(sk,c))
857 858 859 860 861 862 863 864 865 866 867 868
				{
				SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
				goto err;
				}
			}
		}

	if (skp != NULL)
		*skp=sk;
	return(sk);
err:
	if ((skp == NULL) || (*skp == NULL))
B
Ben Laurie 已提交
869
		sk_SSL_CIPHER_free(sk);
870 871 872
	return(NULL);
	}

873
unsigned long SSL_SESSION_hash(SSL_SESSION *a)
874 875 876
	{
	unsigned long l;

877 878 879 880 881
	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);
882 883 884
	return(l);
	}

885
int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
886
	{
887 888 889 890 891
	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));
892 893
	}

894
SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
895
	{
896
	SSL_CTX *ret=NULL;
897 898 899 900 901 902
	
	if (meth == NULL)
		{
		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
		return(NULL);
		}
903 904 905 906 907 908

	if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
		{
		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
		goto err;
		}
909 910 911 912 913 914 915 916 917 918
	ret=(SSL_CTX *)Malloc(sizeof(SSL_CTX));
	if (ret == NULL)
		goto err;

	memset(ret,0,sizeof(SSL_CTX));

	ret->method=meth;

	ret->cert_store=NULL;
	ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
919 920 921
	ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
	ret->session_cache_head=NULL;
	ret->session_cache_tail=NULL;
922 923 924 925 926 927 928 929

	/* We take the system default */
	ret->session_timeout=meth->get_timeout();

	ret->new_session_cb=NULL;
	ret->remove_session_cb=NULL;
	ret->get_session_cb=NULL;

930
	memset((char *)&ret->stats,0,sizeof(ret->stats));
931 932 933 934 935 936 937 938 939 940 941 942 943 944 945

	ret->references=1;
	ret->quiet_shutdown=0;

/*	ret->cipher=NULL;*/
/*	ret->s2->challenge=NULL;
	ret->master_key=NULL;
	ret->key_arg=NULL;
	ret->s2->conn_id=NULL; */

	ret->info_callback=NULL;

	ret->app_verify_callback=NULL;
	ret->app_verify_arg=NULL;

946 947
	ret->read_ahead=0;
	ret->verify_mode=SSL_VERIFY_NONE;
948 949 950 951 952 953 954
	ret->default_verify_callback=NULL;
	if ((ret->default_cert=ssl_cert_new()) == NULL)
		goto err;

	ret->default_passwd_callback=NULL;
	ret->client_cert_cb=NULL;

955
	ret->sessions=lh_new(SSL_SESSION_hash,SSL_SESSION_cmp);
956 957 958 959 960 961 962
	if (ret->sessions == NULL) goto err;
	ret->cert_store=X509_STORE_new();
	if (ret->cert_store == NULL) goto err;

	ssl_create_cipher_list(ret->method,
		&ret->cipher_list,&ret->cipher_list_by_id,
		SSL_DEFAULT_CIPHER_LIST);
B
Ben Laurie 已提交
963 964
	if (ret->cipher_list == NULL
	    || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
965 966 967 968 969
		{
		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
		goto err2;
		}

970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985
	if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
		{
		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
		goto err2;
		}
	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;
		}

B
Ben Laurie 已提交
986
	if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
987 988
		goto err;

989 990
	CRYPTO_new_ex_data(ssl_ctx_meth,(char *)ret,&ret->ex_data);

991
	ret->extra_certs=NULL;
992
	ret->comp_methods=SSL_COMP_get_compression_methods();
993

994 995 996 997 998 999 1000 1001
	return(ret);
err:
	SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
err2:
	if (ret != NULL) SSL_CTX_free(ret);
	return(NULL);
	}

B
Ben Laurie 已提交
1002 1003 1004
static void SSL_COMP_free(SSL_COMP *comp)
    { Free(comp); }

1005
void SSL_CTX_free(SSL_CTX *a)
1006 1007 1008 1009 1010 1011
	{
	int i;

	if (a == NULL) return;

	i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1012 1013 1014
#ifdef REF_PRINT
	REF_PRINT("SSL_CTX",a);
#endif
1015 1016 1017 1018 1019 1020 1021 1022
	if (i > 0) return;
#ifdef REF_CHECK
	if (i < 0)
		{
		fprintf(stderr,"SSL_CTX_free, bad reference count\n");
		abort(); /* ok */
		}
#endif
1023
	CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);
1024 1025 1026 1027 1028 1029 1030 1031 1032

	if (a->sessions != NULL)
		{
		SSL_CTX_flush_sessions(a,0);
		lh_free(a->sessions);
		}
	if (a->cert_store != NULL)
		X509_STORE_free(a->cert_store);
	if (a->cipher_list != NULL)
B
Ben Laurie 已提交
1033
		sk_SSL_CIPHER_free(a->cipher_list);
1034
	if (a->cipher_list_by_id != NULL)
B
Ben Laurie 已提交
1035
		sk_SSL_CIPHER_free(a->cipher_list_by_id);
1036 1037 1038
	if (a->default_cert != NULL)
		ssl_cert_free(a->default_cert);
	if (a->client_CA != NULL)
B
Ben Laurie 已提交
1039
		sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1040
	if (a->extra_certs != NULL)
B
Ben Laurie 已提交
1041
		sk_X509_pop_free(a->extra_certs,X509_free);
1042
	if (a->comp_methods != NULL)
B
Ben Laurie 已提交
1043
		sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1044 1045 1046
	Free((char *)a);
	}

1047
void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx,int (*cb)())
1048 1049 1050 1051
	{
	ctx->default_passwd_callback=cb;
	}

1052
void SSL_CTX_set_cert_verify_cb(SSL_CTX *ctx,int (*cb)(),char *arg)
1053 1054 1055 1056 1057
	{
	ctx->app_verify_callback=cb;
	ctx->app_verify_arg=arg;
	}

1058
void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1059
	{
1060
	ctx->verify_mode=mode;
1061 1062 1063 1064 1065
	ctx->default_verify_callback=cb;
	/* This needs cleaning up EAY EAY EAY */
	X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
	}

B
Ben Laurie 已提交
1066 1067 1068 1069
/* Need default_cert to check for callbacks, for now (see comment in CERT
   strucure)
*/
void ssl_set_cert_masks(CERT *c,CERT *default_cert,SSL_CIPHER *cipher)
1070 1071 1072 1073
	{
	CERT_PKEY *cpk;
	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;
1074
	int rsa_tmp_export,dh_tmp_export,kl;
1075 1076
	unsigned long mask,emask;

B
Ben Laurie 已提交
1077
	if (c == NULL) return;
1078

1079 1080
	kl=SSL_C_EXPORT_PKEYLENGTH(cipher);

1081
#ifndef NO_RSA
B
Ben Laurie 已提交
1082 1083
	rsa_tmp=(c->rsa_tmp != NULL || default_cert->rsa_tmp_cb != NULL);
	rsa_tmp_export=(default_cert->rsa_tmp_cb != NULL ||
1084
		(rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1085 1086 1087 1088
#else
	rsa_tmp=rsa_tmp_export=0;
#endif
#ifndef NO_DH
B
Ben Laurie 已提交
1089 1090
	dh_tmp=(c->dh_tmp != NULL || default_cert->dh_tmp_cb != NULL);
	dh_tmp_export=(default_cert->dh_tmp_cb != NULL ||
1091
		(dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1092 1093 1094 1095 1096
#else
	dh_tmp=dh_tmp_export=0;
#endif

	cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1097 1098
	rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
	rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1099
	cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1100
	rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1101
	cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1102
	dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1103
	cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1104 1105
	dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
	dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1106 1107
	cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
/* FIX THIS EAY EAY EAY */
1108 1109
	dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
	dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1110 1111 1112 1113 1114

	mask=0;
	emask=0;

#ifdef CIPHER_DEBUG
B
Ben Laurie 已提交
1115 1116 1117
	printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
		rsa_tmp,rsa_tmp_export,dh_tmp,
		rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1118 1119 1120 1121
#endif

	if (rsa_enc || (rsa_tmp && rsa_sign))
		mask|=SSL_kRSA;
B
Ben Laurie 已提交
1122
	if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169
		emask|=SSL_kRSA;

#if 0
	/* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
	if (	(dh_tmp || dh_rsa || dh_dsa) && 
		(rsa_enc || rsa_sign || dsa_sign))
		mask|=SSL_kEDH;
	if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
		(rsa_enc || rsa_sign || dsa_sign))
		emask|=SSL_kEDH;
#endif

	if (dh_tmp_export) 
		emask|=SSL_kEDH;

	if (dh_tmp)
		mask|=SSL_kEDH;

	if (dh_rsa) mask|=SSL_kDHr;
	if (dh_rsa_export) emask|=SSL_kDHr;

	if (dh_dsa) mask|=SSL_kDHd;
	if (dh_dsa_export) emask|=SSL_kDHd;

	if (rsa_enc || rsa_sign)
		{
		mask|=SSL_aRSA;
		emask|=SSL_aRSA;
		}

	if (dsa_sign)
		{
		mask|=SSL_aDSS;
		emask|=SSL_aDSS;
		}

#ifdef SSL_ALLOW_ADH
	mask|=SSL_aNULL;
	emask|=SSL_aNULL;
#endif

	c->mask=mask;
	c->export_mask=emask;
	c->valid=1;
	}

/* THIS NEEDS CLEANING UP */
1170
X509 *ssl_get_server_send_cert(SSL *s)
1171 1172 1173
	{
	unsigned long alg,mask,kalg;
	CERT *c;
1174
	int i,export;
1175 1176

	c=s->cert;
B
Ben Laurie 已提交
1177
	ssl_set_cert_masks(c,s->ctx->default_cert,s->s3->tmp.new_cipher);
1178
	alg=s->s3->tmp.new_cipher->algorithms;
1179 1180
	export=SSL_IS_EXPORT(alg);
	mask=export?c->export_mask:c->mask;
1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204
	kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);

	if 	(kalg & SSL_kDHr)
		i=SSL_PKEY_DH_RSA;
	else if (kalg & SSL_kDHd)
		i=SSL_PKEY_DH_DSA;
	else if (kalg & SSL_aDSS)
		i=SSL_PKEY_DSA_SIGN;
	else if (kalg & SSL_aRSA)
		{
		if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
			i=SSL_PKEY_RSA_SIGN;
		else
			i=SSL_PKEY_RSA_ENC;
		}
	else /* if (kalg & SSL_aNULL) */
		{
		SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,SSL_R_INTERNAL_ERROR);
		return(NULL);
		}
	if (c->pkeys[i].x509 == NULL) return(NULL);
	return(c->pkeys[i].x509);
	}

1205
EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231
	{
	unsigned long alg;
	CERT *c;

	alg=cipher->algorithms;
	c=s->cert;

	if ((alg & SSL_aDSS) &&
		(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
		return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
	else if (alg & SSL_aRSA)
		{
		if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
			return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
		else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
			return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
		else
			return(NULL);
		}
	else /* if (alg & SSL_aNULL) */
		{
		SSLerr(SSL_F_SSL_GET_SIGN_PKEY,SSL_R_INTERNAL_ERROR);
		return(NULL);
		}
	}

1232
void ssl_update_cache(SSL *s,int mode)
1233
	{
1234 1235 1236 1237 1238 1239
	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;

1240 1241 1242 1243 1244
	if ((s->ctx->session_cache_mode & mode)
		&& (!s->hit)
		&& SSL_CTX_add_session(s->ctx,s->session)
		&& (s->ctx->new_session_cb != NULL))
		{
1245
		CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1246 1247 1248 1249 1250
		if (!s->ctx->new_session_cb(s,s->session))
			SSL_SESSION_free(s->session);
		}

	/* auto flush every 255 connections */
1251 1252 1253 1254 1255
	i=s->ctx->session_cache_mode;
	if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
		((i & mode) == mode))
		{
		if (  (((mode & SSL_SESS_CACHE_CLIENT)
1256 1257
			?s->ctx->stats.sess_connect_good
			:s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1258 1259 1260 1261
			{
			SSL_CTX_flush_sessions(s->ctx,time(NULL));
			}
		}
1262 1263
	}

1264
SSL_METHOD *SSL_get_ssl_method(SSL *s)
1265 1266 1267 1268
	{
	return(s->method);
	}

1269
int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295
	{
	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);
	}

1296
int SSL_get_error(SSL *s,int i)
1297 1298
	{
	int reason;
1299
	unsigned long l;
1300 1301 1302 1303
	BIO *bio;

	if (i > 0) return(SSL_ERROR_NONE);

1304 1305 1306 1307 1308 1309 1310 1311 1312
	/* 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);
		}
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

	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))
			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
				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))
			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
				return(SSL_ERROR_SYSCALL);
			}
		}
	if ((i < 0) && SSL_want_x509_lookup(s))
		{
		return(SSL_ERROR_WANT_X509_LOOKUP);
		}

	if (i == 0)
		{
1354
		if (s->version == SSL2_VERSION)
1355 1356 1357 1358 1359 1360 1361
			{
			/* assume it is the socket being closed */
			return(SSL_ERROR_ZERO_RETURN);
			}
		else
			{
			if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1362
				(s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1363 1364 1365 1366 1367 1368
				return(SSL_ERROR_ZERO_RETURN);
			}
		}
	return(SSL_ERROR_SYSCALL);
	}

1369
int SSL_do_handshake(SSL *s)
1370
	{
1371 1372
	int ret=1;

1373 1374
	if (s->handshake_func == NULL)
		{
1375
		SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1376 1377
		return(-1);
		}
1378 1379 1380

	s->method->ssl_renegotiate_check(s);

1381
	if (SSL_in_init(s) || SSL_in_before(s))
1382 1383 1384 1385
		{
		ret=s->handshake_func(s);
		}
	return(ret);
1386 1387 1388 1389
	}

/* For the next 2 functions, SSL_clear() sets shutdown and so
 * one of these calls will reset it */
1390
void SSL_set_accept_state(SSL *s)
1391
	{
1392
	s->server=1;
1393 1394 1395 1396 1397 1398 1399
	s->shutdown=0;
	s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
	s->handshake_func=s->method->ssl_accept;
	/* clear the current cipher */
	ssl_clear_cipher_ctx(s);
	}

1400
void SSL_set_connect_state(SSL *s)
1401
	{
1402
	s->server=0;
1403 1404 1405 1406 1407 1408 1409
	s->shutdown=0;
	s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
	s->handshake_func=s->method->ssl_connect;
	/* clear the current cipher */
	ssl_clear_cipher_ctx(s);
	}

1410
int ssl_undefined_function(SSL *s)
1411 1412 1413 1414 1415
	{
	SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	return(0);
	}

1416
SSL_METHOD *ssl_bad_method(int ver)
1417 1418 1419 1420 1421
	{
	SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	return(NULL);
	}

1422
char *SSL_get_version(SSL *s)
1423
	{
1424 1425 1426
	if (s->version == TLS1_VERSION)
		return("TLSv1");
	else if (s->version == SSL3_VERSION)
1427
		return("SSLv3");
1428
	else if (s->version == SSL2_VERSION)
1429 1430 1431 1432 1433
		return("SSLv2");
	else
		return("unknown");
	}

1434
SSL *SSL_dup(SSL *s)
1435
        {
B
Ben Laurie 已提交
1436
	STACK_OF(X509_NAME) *sk;
1437 1438 1439 1440
	X509_NAME *xn;
        SSL *ret;
	int i;
		 
B
Ben Laurie 已提交
1441 1442
	if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
	    return(NULL);
1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453
			  
	/* This copies version, session-id, SSL_METHOD and 'cert' */
	SSL_copy_session_id(ret,s);

	SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
	SSL_set_verify(ret,SSL_get_verify_mode(s),
		SSL_get_verify_callback(s));

	SSL_set_info_callback(ret,SSL_get_info_callback(s));
	
	ret->debug=s->debug;
1454
	ret->options=s->options;
1455 1456

	/* copy app data, a little dangerous perhaps */
1457 1458
	if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
		goto err;
1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469

	/* 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)
			{
1470
			if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
1471 1472 1473 1474 1475 1476 1477 1478 1479
				goto err;
			}
		else
			ret->wbio=ret->rbio;
		}

	/* dup the cipher_list and cipher_list_by_id stacks */
	if (s->cipher_list != NULL)
		{
B
Ben Laurie 已提交
1480
		if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
1481 1482 1483
			goto err;
		}
	if (s->cipher_list_by_id != NULL)
B
Ben Laurie 已提交
1484
		if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
1485 1486 1487 1488 1489 1490
			== NULL)
			goto err;

	/* Dup the client_CA list */
	if (s->client_CA != NULL)
		{
B
Ben Laurie 已提交
1491
		if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
1492
		ret->client_CA=sk;
B
Ben Laurie 已提交
1493
		for (i=0; i<sk_X509_NAME_num(sk); i++)
1494
			{
B
Ben Laurie 已提交
1495 1496
			xn=sk_X509_NAME_value(sk,i);
			if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
1497 1498 1499 1500 1501 1502 1503 1504 1505 1506
				{
				X509_NAME_free(xn);
				goto err;
				}
			}
		}

	ret->shutdown=s->shutdown;
	ret->state=s->state;
	ret->handshake_func=s->handshake_func;
1507
	ret->server=s->server;
1508 1509 1510 1511 1512 1513 1514 1515 1516 1517

	if (0)
		{
err:
		if (ret != NULL) SSL_free(ret);
		ret=NULL;
		}
	return(ret);
	}

1518
void ssl_clear_cipher_ctx(SSL *s)
1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531
	{
        if (s->enc_read_ctx != NULL)
                {
                EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
                Free(s->enc_read_ctx);
                s->enc_read_ctx=NULL;
                }
        if (s->enc_write_ctx != NULL)
                {
                EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
                Free(s->enc_write_ctx);
                s->enc_write_ctx=NULL;
                }
1532 1533 1534 1535 1536 1537 1538 1539 1540 1541
	if (s->expand != NULL)
		{
		COMP_CTX_free(s->expand);
		s->expand=NULL;
		}
	if (s->compress != NULL)
		{
		COMP_CTX_free(s->compress);
		s->compress=NULL;
		}
1542 1543
	}

1544
/* Fix this function so that it takes an optional type parameter */
1545
X509 *SSL_get_certificate(SSL *s)
1546 1547 1548 1549 1550 1551 1552
	{
	if (s->cert != NULL)
		return(s->cert->key->x509);
	else
		return(NULL);
	}

1553
/* Fix this function so that it takes an optional type parameter */
1554
EVP_PKEY *SSL_get_privatekey(SSL *s)
1555 1556 1557 1558 1559 1560 1561
	{
	if (s->cert != NULL)
		return(s->cert->key->privatekey);
	else
		return(NULL);
	}

1562
SSL_CIPHER *SSL_get_current_cipher(SSL *s)
1563 1564 1565 1566 1567 1568
	{
        if ((s->session != NULL) && (s->session->cipher != NULL))
                return(s->session->cipher);
        return(NULL);
	}

1569
int ssl_init_wbio_buffer(SSL *s,int push)
1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603
	{
	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);
		}
	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);
	}
1604

1605
void ssl_free_wbio_buffer(SSL *s)
1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622
	{
	BIO *under;

	if (s->bbio == NULL) return;

	if (s->bbio == s->wbio)
		{
		/* remove buffering */
		under=BIO_pop(s->wbio);
		if (under != NULL)
			s->wbio=under;
		else
			abort(); /* ok */
		}
	BIO_free(s->bbio);
	s->bbio=NULL;
	}
1623
	
1624
void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
1625 1626 1627 1628
	{
	ctx->quiet_shutdown=mode;
	}

1629
int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
1630 1631 1632 1633
	{
	return(ctx->quiet_shutdown);
	}

1634
void SSL_set_quiet_shutdown(SSL *s,int mode)
1635 1636 1637 1638
	{
	s->quiet_shutdown=mode;
	}

1639
int SSL_get_quiet_shutdown(SSL *s)
1640 1641 1642 1643
	{
	return(s->quiet_shutdown);
	}

1644
void SSL_set_shutdown(SSL *s,int mode)
1645 1646 1647 1648
	{
	s->shutdown=mode;
	}

1649
int SSL_get_shutdown(SSL *s)
1650 1651 1652 1653
	{
	return(s->shutdown);
	}

1654
int SSL_version(SSL *s)
1655 1656 1657 1658
	{
	return(s->version);
	}

1659
SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
1660 1661 1662 1663
	{
	return(ssl->ctx);
	}

1664
#ifndef NO_STDIO
1665
int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
1666 1667 1668 1669
	{
	return(X509_STORE_set_default_paths(ctx->cert_store));
	}

1670
int SSL_CTX_load_verify_locations(SSL_CTX *ctx,char *CAfile,char *CApath)
1671 1672 1673
	{
	return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
	}
1674
#endif
1675

1676
void SSL_set_info_callback(SSL *ssl,void (*cb)())
1677 1678 1679 1680
	{
	ssl->info_callback=cb;
	}

U
Ulf Möller 已提交
1681
void (*SSL_get_info_callback(SSL *ssl))(void)
1682
	{
1683
	return((void (*)())ssl->info_callback);
1684 1685
	}

1686
int SSL_state(SSL *ssl)
1687 1688 1689 1690
	{
	return(ssl->state);
	}

1691
void SSL_set_verify_result(SSL *ssl,long arg)
1692 1693 1694 1695
	{
	ssl->verify_result=arg;
	}

1696
long SSL_get_verify_result(SSL *ssl)
1697 1698 1699 1700
	{
	return(ssl->verify_result);
	}

1701 1702
int SSL_get_ex_new_index(long argl,char *argp,int (*new_func)(),
			 int (*dup_func)(),void (*free_func)())
1703 1704 1705 1706 1707 1708
        {
	ssl_meth_num++;
	return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
		&ssl_meth,argl,argp,new_func,dup_func,free_func));
        }

1709
int SSL_set_ex_data(SSL *s,int idx,void *arg)
1710 1711 1712 1713
	{
	return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
	}

1714
void *SSL_get_ex_data(SSL *s,int idx)
1715 1716 1717 1718
	{
	return(CRYPTO_get_ex_data(&s->ex_data,idx));
	}

1719 1720
int SSL_CTX_get_ex_new_index(long argl,char *argp,int (*new_func)(),
			     int (*dup_func)(),void (*free_func)())
1721 1722 1723 1724 1725 1726
        {
	ssl_ctx_meth_num++;
	return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
		&ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
        }

1727
int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
1728 1729 1730 1731
	{
	return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
	}

1732
void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
1733 1734 1735 1736
	{
	return(CRYPTO_get_ex_data(&s->ex_data,idx));
	}

1737
int ssl_ok(SSL *s)
1738 1739 1740 1741
	{
	return(1);
	}

1742
X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
1743 1744 1745 1746
	{
	return(ctx->cert_store);
	}

1747
void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
1748 1749 1750 1751 1752 1753
	{
	if (ctx->cert_store != NULL)
		X509_STORE_free(ctx->cert_store);
	ctx->cert_store=store;
	}

1754
int SSL_want(SSL *s)
1755 1756 1757 1758
	{
	return(s->rwstate);
	}

1759 1760 1761 1762 1763 1764
/*!
 * \brief Set the callback for generating temporary RSA keys.
 * \param ctx the SSL context.
 * \param cb the callback
 */

1765
#ifndef NO_RSA
1766 1767
void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,int export,
							  int keylength))
1768
    { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1769 1770 1771 1772 1773 1774 1775
#endif

#ifndef NO_RSA
void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,int export,
							  int keylength))
    { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
#endif
1776

1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797
#ifdef DOXYGEN
/*!
 * \brief The RSA temporary key callback function.
 * \param ssl the SSL session.
 * \param export \c TRUE if the temp RSA key is for an export ciphersuite.
 * \param keylength if \c export is \c TRUE, then \c keylength is the size of
 * the required key in bits.
 * \return the temporary RSA key.
 * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
 */

RSA *cb(SSL *ssl,int export,int keylength)
    {}
#endif

/*!
 * \brief Set the callback for generating temporary DH keys.
 * \param ctx the SSL context.
 * \param dh the callback
 */

1798
#ifndef NO_DH
1799 1800
void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int export,
							int keylength))
1801 1802
    { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }

1803 1804 1805
void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int export,
							int keylength))
    { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1806
#endif
1807

1808 1809 1810
#if defined(_WINDLL) && defined(WIN16)
#include "../crypto/bio/bss_file.c"
#endif
B
Ben Laurie 已提交
1811 1812 1813

IMPLEMENT_STACK_OF(SSL_CIPHER)
IMPLEMENT_STACK_OF(SSL_COMP)