ui_lib.c 24.3 KB
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/* crypto/ui/ui_lib.c -*- mode:C; c-file-style: "eay" -*- */
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/*
 * Written by Richard Levitte (richard@levitte.org) for the OpenSSL project
 * 2001.
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 */
/* ====================================================================
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 * Copyright (c) 2001 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).
 *
 */

#include <string.h>
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#include "internal/cryptlib.h"
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#include <openssl/e_os2.h>
#include <openssl/buffer.h>
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#include <openssl/ui.h>
#include <openssl/err.h>
#include "ui_locl.h"

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static const UI_METHOD *default_UI_meth = NULL;
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UI *UI_new(void)
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{
    return (UI_new_method(NULL));
}
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UI *UI_new_method(const UI_METHOD *method)
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{
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    UI *ret = OPENSSL_zalloc(sizeof(*ret));
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    if (ret == NULL) {
        UIerr(UI_F_UI_NEW_METHOD, ERR_R_MALLOC_FAILURE);
        return NULL;
    }
    if (method == NULL)
        ret->meth = UI_get_default_method();
    else
        ret->meth = method;

    CRYPTO_new_ex_data(CRYPTO_EX_INDEX_UI, ret, &ret->ex_data);
    return ret;
}
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static void free_string(UI_STRING *uis)
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{
    if (uis->flags & OUT_STRING_FREEABLE) {
        OPENSSL_free((char *)uis->out_string);
        switch (uis->type) {
        case UIT_BOOLEAN:
            OPENSSL_free((char *)uis->_.boolean_data.action_desc);
            OPENSSL_free((char *)uis->_.boolean_data.ok_chars);
            OPENSSL_free((char *)uis->_.boolean_data.cancel_chars);
            break;
        default:
            break;
        }
    }
    OPENSSL_free(uis);
}
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void UI_free(UI *ui)
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{
    if (ui == NULL)
        return;
    sk_UI_STRING_pop_free(ui->strings, free_string);
    CRYPTO_free_ex_data(CRYPTO_EX_INDEX_UI, ui, &ui->ex_data);
    OPENSSL_free(ui);
}
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static int allocate_string_stack(UI *ui)
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{
    if (ui->strings == NULL) {
        ui->strings = sk_UI_STRING_new_null();
        if (ui->strings == NULL) {
            return -1;
        }
    }
    return 0;
}
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static UI_STRING *general_allocate_prompt(UI *ui, const char *prompt,
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                                          int prompt_freeable,
                                          enum UI_string_types type,
                                          int input_flags, char *result_buf)
{
    UI_STRING *ret = NULL;

    if (prompt == NULL) {
        UIerr(UI_F_GENERAL_ALLOCATE_PROMPT, ERR_R_PASSED_NULL_PARAMETER);
    } else if ((type == UIT_PROMPT || type == UIT_VERIFY
                || type == UIT_BOOLEAN) && result_buf == NULL) {
        UIerr(UI_F_GENERAL_ALLOCATE_PROMPT, UI_R_NO_RESULT_BUFFER);
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    } else if ((ret = OPENSSL_malloc(sizeof(*ret))) != NULL) {
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        ret->out_string = prompt;
        ret->flags = prompt_freeable ? OUT_STRING_FREEABLE : 0;
        ret->input_flags = input_flags;
        ret->type = type;
        ret->result_buf = result_buf;
    }
    return ret;
}
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static int general_allocate_string(UI *ui, const char *prompt,
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                                   int prompt_freeable,
                                   enum UI_string_types type, int input_flags,
                                   char *result_buf, int minsize, int maxsize,
                                   const char *test_buf)
{
    int ret = -1;
    UI_STRING *s = general_allocate_prompt(ui, prompt, prompt_freeable,
                                           type, input_flags, result_buf);

    if (s) {
        if (allocate_string_stack(ui) >= 0) {
            s->_.string_data.result_minsize = minsize;
            s->_.string_data.result_maxsize = maxsize;
            s->_.string_data.test_buf = test_buf;
            ret = sk_UI_STRING_push(ui->strings, s);
            /* sk_push() returns 0 on error.  Let's addapt that */
            if (ret <= 0)
                ret--;
        } else
            free_string(s);
    }
    return ret;
}
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static int general_allocate_boolean(UI *ui,
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                                    const char *prompt,
                                    const char *action_desc,
                                    const char *ok_chars,
                                    const char *cancel_chars,
                                    int prompt_freeable,
                                    enum UI_string_types type,
                                    int input_flags, char *result_buf)
{
    int ret = -1;
    UI_STRING *s;
    const char *p;

    if (ok_chars == NULL) {
        UIerr(UI_F_GENERAL_ALLOCATE_BOOLEAN, ERR_R_PASSED_NULL_PARAMETER);
    } else if (cancel_chars == NULL) {
        UIerr(UI_F_GENERAL_ALLOCATE_BOOLEAN, ERR_R_PASSED_NULL_PARAMETER);
    } else {
        for (p = ok_chars; *p; p++) {
            if (strchr(cancel_chars, *p)) {
                UIerr(UI_F_GENERAL_ALLOCATE_BOOLEAN,
                      UI_R_COMMON_OK_AND_CANCEL_CHARACTERS);
            }
        }

        s = general_allocate_prompt(ui, prompt, prompt_freeable,
                                    type, input_flags, result_buf);

        if (s) {
            if (allocate_string_stack(ui) >= 0) {
                s->_.boolean_data.action_desc = action_desc;
                s->_.boolean_data.ok_chars = ok_chars;
                s->_.boolean_data.cancel_chars = cancel_chars;
                ret = sk_UI_STRING_push(ui->strings, s);
                /*
                 * sk_push() returns 0 on error. Let's addapt that
                 */
                if (ret <= 0)
                    ret--;
            } else
                free_string(s);
        }
    }
    return ret;
}

/*
 * Returns the index to the place in the stack or -1 for error.  Uses a
 * direct reference to the prompt.
 */
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int UI_add_input_string(UI *ui, const char *prompt, int flags,
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                        char *result_buf, int minsize, int maxsize)
{
    return general_allocate_string(ui, prompt, 0,
                                   UIT_PROMPT, flags, result_buf, minsize,
                                   maxsize, NULL);
}
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/* Same as UI_add_input_string(), excepts it takes a copy of the prompt */
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int UI_dup_input_string(UI *ui, const char *prompt, int flags,
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                        char *result_buf, int minsize, int maxsize)
{
    char *prompt_copy = NULL;

    if (prompt) {
        prompt_copy = BUF_strdup(prompt);
        if (prompt_copy == NULL) {
            UIerr(UI_F_UI_DUP_INPUT_STRING, ERR_R_MALLOC_FAILURE);
            return 0;
        }
    }

    return general_allocate_string(ui, prompt_copy, 1,
                                   UIT_PROMPT, flags, result_buf, minsize,
                                   maxsize, NULL);
}
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int UI_add_verify_string(UI *ui, const char *prompt, int flags,
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                         char *result_buf, int minsize, int maxsize,
                         const char *test_buf)
{
    return general_allocate_string(ui, prompt, 0,
                                   UIT_VERIFY, flags, result_buf, minsize,
                                   maxsize, test_buf);
}
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int UI_dup_verify_string(UI *ui, const char *prompt, int flags,
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                         char *result_buf, int minsize, int maxsize,
                         const char *test_buf)
{
    char *prompt_copy = NULL;

    if (prompt) {
        prompt_copy = BUF_strdup(prompt);
        if (prompt_copy == NULL) {
            UIerr(UI_F_UI_DUP_VERIFY_STRING, ERR_R_MALLOC_FAILURE);
            return -1;
        }
    }

    return general_allocate_string(ui, prompt_copy, 1,
                                   UIT_VERIFY, flags, result_buf, minsize,
                                   maxsize, test_buf);
}
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int UI_add_input_boolean(UI *ui, const char *prompt, const char *action_desc,
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                         const char *ok_chars, const char *cancel_chars,
                         int flags, char *result_buf)
{
    return general_allocate_boolean(ui, prompt, action_desc,
                                    ok_chars, cancel_chars, 0, UIT_BOOLEAN,
                                    flags, result_buf);
}
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int UI_dup_input_boolean(UI *ui, const char *prompt, const char *action_desc,
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                         const char *ok_chars, const char *cancel_chars,
                         int flags, char *result_buf)
{
    char *prompt_copy = NULL;
    char *action_desc_copy = NULL;
    char *ok_chars_copy = NULL;
    char *cancel_chars_copy = NULL;

    if (prompt) {
        prompt_copy = BUF_strdup(prompt);
        if (prompt_copy == NULL) {
            UIerr(UI_F_UI_DUP_INPUT_BOOLEAN, ERR_R_MALLOC_FAILURE);
            goto err;
        }
    }

    if (action_desc) {
        action_desc_copy = BUF_strdup(action_desc);
        if (action_desc_copy == NULL) {
            UIerr(UI_F_UI_DUP_INPUT_BOOLEAN, ERR_R_MALLOC_FAILURE);
            goto err;
        }
    }

    if (ok_chars) {
        ok_chars_copy = BUF_strdup(ok_chars);
        if (ok_chars_copy == NULL) {
            UIerr(UI_F_UI_DUP_INPUT_BOOLEAN, ERR_R_MALLOC_FAILURE);
            goto err;
        }
    }

    if (cancel_chars) {
        cancel_chars_copy = BUF_strdup(cancel_chars);
        if (cancel_chars_copy == NULL) {
            UIerr(UI_F_UI_DUP_INPUT_BOOLEAN, ERR_R_MALLOC_FAILURE);
            goto err;
        }
    }

    return general_allocate_boolean(ui, prompt_copy, action_desc_copy,
                                    ok_chars_copy, cancel_chars_copy, 1,
                                    UIT_BOOLEAN, flags, result_buf);
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 err:
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    OPENSSL_free(prompt_copy);
    OPENSSL_free(action_desc_copy);
    OPENSSL_free(ok_chars_copy);
    OPENSSL_free(cancel_chars_copy);
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    return -1;
}
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int UI_add_info_string(UI *ui, const char *text)
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{
    return general_allocate_string(ui, text, 0, UIT_INFO, 0, NULL, 0, 0,
                                   NULL);
}
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int UI_dup_info_string(UI *ui, const char *text)
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{
    char *text_copy = NULL;

    if (text) {
        text_copy = BUF_strdup(text);
        if (text_copy == NULL) {
            UIerr(UI_F_UI_DUP_INFO_STRING, ERR_R_MALLOC_FAILURE);
            return -1;
        }
    }

    return general_allocate_string(ui, text_copy, 1, UIT_INFO, 0, NULL,
                                   0, 0, NULL);
}
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int UI_add_error_string(UI *ui, const char *text)
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{
    return general_allocate_string(ui, text, 0, UIT_ERROR, 0, NULL, 0, 0,
                                   NULL);
}
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int UI_dup_error_string(UI *ui, const char *text)
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{
    char *text_copy = NULL;

    if (text) {
        text_copy = BUF_strdup(text);
        if (text_copy == NULL) {
            UIerr(UI_F_UI_DUP_ERROR_STRING, ERR_R_MALLOC_FAILURE);
            return -1;
        }
    }
    return general_allocate_string(ui, text_copy, 1, UIT_ERROR, 0, NULL,
                                   0, 0, NULL);
}
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char *UI_construct_prompt(UI *ui, const char *object_desc,
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                          const char *object_name)
{
    char *prompt = NULL;

    if (ui->meth->ui_construct_prompt)
        prompt = ui->meth->ui_construct_prompt(ui, object_desc, object_name);
    else {
        char prompt1[] = "Enter ";
        char prompt2[] = " for ";
        char prompt3[] = ":";
        int len = 0;

        if (object_desc == NULL)
            return NULL;
        len = sizeof(prompt1) - 1 + strlen(object_desc);
        if (object_name)
            len += sizeof(prompt2) - 1 + strlen(object_name);
        len += sizeof(prompt3) - 1;

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        prompt = OPENSSL_malloc(len + 1);
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        if (prompt == NULL)
            return NULL;
        BUF_strlcpy(prompt, prompt1, len + 1);
        BUF_strlcat(prompt, object_desc, len + 1);
        if (object_name) {
            BUF_strlcat(prompt, prompt2, len + 1);
            BUF_strlcat(prompt, object_name, len + 1);
        }
        BUF_strlcat(prompt, prompt3, len + 1);
    }
    return prompt;
}
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void *UI_add_user_data(UI *ui, void *user_data)
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{
    void *old_data = ui->user_data;
    ui->user_data = user_data;
    return old_data;
}
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void *UI_get0_user_data(UI *ui)
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{
    return ui->user_data;
}
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const char *UI_get0_result(UI *ui, int i)
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{
    if (i < 0) {
        UIerr(UI_F_UI_GET0_RESULT, UI_R_INDEX_TOO_SMALL);
        return NULL;
    }
    if (i >= sk_UI_STRING_num(ui->strings)) {
        UIerr(UI_F_UI_GET0_RESULT, UI_R_INDEX_TOO_LARGE);
        return NULL;
    }
    return UI_get0_result_string(sk_UI_STRING_value(ui->strings, i));
}
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static int print_error(const char *str, size_t len, UI *ui)
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{
    UI_STRING uis;
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    memset(&uis, 0, sizeof(uis));
    uis.type = UIT_ERROR;
    uis.out_string = str;
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    if (ui->meth->ui_write_string && !ui->meth->ui_write_string(ui, &uis))
        return -1;
    return 0;
}
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int UI_process(UI *ui)
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{
    int i, ok = 0;
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    if (ui->meth->ui_open_session && !ui->meth->ui_open_session(ui))
        return -1;

    if (ui->flags & UI_FLAG_PRINT_ERRORS)
        ERR_print_errors_cb((int (*)(const char *, size_t, void *))
                            print_error, (void *)ui);

    for (i = 0; i < sk_UI_STRING_num(ui->strings); i++) {
        if (ui->meth->ui_write_string
            && !ui->meth->ui_write_string(ui,
                                          sk_UI_STRING_value(ui->strings, i)))
        {
            ok = -1;
            goto err;
        }
    }

    if (ui->meth->ui_flush)
        switch (ui->meth->ui_flush(ui)) {
        case -1:               /* Interrupt/Cancel/something... */
            ok = -2;
            goto err;
        case 0:                /* Errors */
            ok = -1;
            goto err;
        default:               /* Success */
            ok = 0;
            break;
        }

    for (i = 0; i < sk_UI_STRING_num(ui->strings); i++) {
        if (ui->meth->ui_read_string) {
            switch (ui->meth->ui_read_string(ui,
                                             sk_UI_STRING_value(ui->strings,
                                                                i))) {
            case -1:           /* Interrupt/Cancel/something... */
                ok = -2;
                goto err;
            case 0:            /* Errors */
                ok = -1;
                goto err;
            default:           /* Success */
                ok = 0;
                break;
            }
        }
    }
 err:
    if (ui->meth->ui_close_session && !ui->meth->ui_close_session(ui))
        return -1;
    return ok;
}

int UI_ctrl(UI *ui, int cmd, long i, void *p, void (*f) (void))
{
    if (ui == NULL) {
        UIerr(UI_F_UI_CTRL, ERR_R_PASSED_NULL_PARAMETER);
        return -1;
    }
    switch (cmd) {
    case UI_CTRL_PRINT_ERRORS:
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        {
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            int save_flag = ! !(ui->flags & UI_FLAG_PRINT_ERRORS);
            if (i)
                ui->flags |= UI_FLAG_PRINT_ERRORS;
            else
                ui->flags &= ~UI_FLAG_PRINT_ERRORS;
            return save_flag;
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        }
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    case UI_CTRL_IS_REDOABLE:
        return ! !(ui->flags & UI_FLAG_REDOABLE);
    default:
        break;
    }
    UIerr(UI_F_UI_CTRL, UI_R_UNKNOWN_CONTROL_COMMAND);
    return -1;
}

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int UI_set_ex_data(UI *r, int idx, void *arg)
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{
    return (CRYPTO_set_ex_data(&r->ex_data, idx, arg));
}
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void *UI_get_ex_data(UI *r, int idx)
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{
    return (CRYPTO_get_ex_data(&r->ex_data, idx));
}
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void UI_set_default_method(const UI_METHOD *meth)
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{
    default_UI_meth = meth;
}
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const UI_METHOD *UI_get_default_method(void)
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{
    if (default_UI_meth == NULL) {
        default_UI_meth = UI_OpenSSL();
    }
    return default_UI_meth;
}
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const UI_METHOD *UI_get_method(UI *ui)
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{
    return ui->meth;
}
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const UI_METHOD *UI_set_method(UI *ui, const UI_METHOD *meth)
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{
    ui->meth = meth;
    return ui->meth;
}
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UI_METHOD *UI_create_method(char *name)
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{
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    UI_METHOD *ui_method = OPENSSL_zalloc(sizeof(*ui_method));
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    if (ui_method != NULL)
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        ui_method->name = BUF_strdup(name);
    return ui_method;
}

/*
 * BIG FSCKING WARNING!!!! If you use this on a statically allocated method
 * (that is, it hasn't been allocated using UI_create_method(), you deserve
 * anything Murphy can throw at you and more! You have been warned.
 */
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void UI_destroy_method(UI_METHOD *ui_method)
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{
    OPENSSL_free(ui_method->name);
    ui_method->name = NULL;
    OPENSSL_free(ui_method);
}

int UI_method_set_opener(UI_METHOD *method, int (*opener) (UI *ui))
{
    if (method) {
        method->ui_open_session = opener;
        return 0;
    } else
        return -1;
}

int UI_method_set_writer(UI_METHOD *method,
                         int (*writer) (UI *ui, UI_STRING *uis))
{
    if (method) {
        method->ui_write_string = writer;
        return 0;
    } else
        return -1;
}

int UI_method_set_flusher(UI_METHOD *method, int (*flusher) (UI *ui))
{
    if (method) {
        method->ui_flush = flusher;
        return 0;
    } else
        return -1;
}

int UI_method_set_reader(UI_METHOD *method,
                         int (*reader) (UI *ui, UI_STRING *uis))
{
    if (method) {
        method->ui_read_string = reader;
        return 0;
    } else
        return -1;
}

int UI_method_set_closer(UI_METHOD *method, int (*closer) (UI *ui))
{
    if (method) {
        method->ui_close_session = closer;
        return 0;
    } else
        return -1;
}

int UI_method_set_prompt_constructor(UI_METHOD *method,
                                     char *(*prompt_constructor) (UI *ui,
                                                                  const char
                                                                  *object_desc,
                                                                  const char
                                                                  *object_name))
{
    if (method) {
        method->ui_construct_prompt = prompt_constructor;
        return 0;
    } else
        return -1;
}

int (*UI_method_get_opener(UI_METHOD *method)) (UI *) {
    if (method)
        return method->ui_open_session;
    else
        return NULL;
}

int (*UI_method_get_writer(UI_METHOD *method)) (UI *, UI_STRING *) {
    if (method)
        return method->ui_write_string;
    else
        return NULL;
}

int (*UI_method_get_flusher(UI_METHOD *method)) (UI *) {
    if (method)
        return method->ui_flush;
    else
        return NULL;
}

int (*UI_method_get_reader(UI_METHOD *method)) (UI *, UI_STRING *) {
    if (method)
        return method->ui_read_string;
    else
        return NULL;
}

int (*UI_method_get_closer(UI_METHOD *method)) (UI *) {
    if (method)
        return method->ui_close_session;
    else
        return NULL;
}

char *(*UI_method_get_prompt_constructor(UI_METHOD *method)) (UI *,
                                                              const char *,
                                                              const char *) {
    if (method)
        return method->ui_construct_prompt;
    else
        return NULL;
}
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enum UI_string_types UI_get_string_type(UI_STRING *uis)
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{
    if (!uis)
        return UIT_NONE;
    return uis->type;
}
705

706
int UI_get_input_flags(UI_STRING *uis)
707 708 709 710 711
{
    if (!uis)
        return 0;
    return uis->input_flags;
}
712

713
const char *UI_get0_output_string(UI_STRING *uis)
714 715 716 717 718
{
    if (!uis)
        return NULL;
    return uis->out_string;
}
719

720
const char *UI_get0_action_string(UI_STRING *uis)
721 722 723 724 725 726 727 728 729 730 731
{
    if (!uis)
        return NULL;
    switch (uis->type) {
    case UIT_PROMPT:
    case UIT_BOOLEAN:
        return uis->_.boolean_data.action_desc;
    default:
        return NULL;
    }
}
732

733
const char *UI_get0_result_string(UI_STRING *uis)
734 735 736 737 738 739 740 741 742 743 744
{
    if (!uis)
        return NULL;
    switch (uis->type) {
    case UIT_PROMPT:
    case UIT_VERIFY:
        return uis->result_buf;
    default:
        return NULL;
    }
}
745 746

const char *UI_get0_test_string(UI_STRING *uis)
747 748 749 750 751 752 753 754 755 756
{
    if (!uis)
        return NULL;
    switch (uis->type) {
    case UIT_VERIFY:
        return uis->_.string_data.test_buf;
    default:
        return NULL;
    }
}
757 758

int UI_get_result_minsize(UI_STRING *uis)
759 760 761 762 763 764 765 766 767 768 769
{
    if (!uis)
        return -1;
    switch (uis->type) {
    case UIT_PROMPT:
    case UIT_VERIFY:
        return uis->_.string_data.result_minsize;
    default:
        return -1;
    }
}
770 771

int UI_get_result_maxsize(UI_STRING *uis)
772 773 774 775 776 777 778 779 780 781 782
{
    if (!uis)
        return -1;
    switch (uis->type) {
    case UIT_PROMPT:
    case UIT_VERIFY:
        return uis->_.string_data.result_maxsize;
    default:
        return -1;
    }
}
783

784
int UI_set_result(UI *ui, UI_STRING *uis, const char *result)
785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853
{
    int l = strlen(result);

    ui->flags &= ~UI_FLAG_REDOABLE;

    if (!uis)
        return -1;
    switch (uis->type) {
    case UIT_PROMPT:
    case UIT_VERIFY:
        {
            char number1[DECIMAL_SIZE(uis->_.string_data.result_minsize) + 1];
            char number2[DECIMAL_SIZE(uis->_.string_data.result_maxsize) + 1];

            BIO_snprintf(number1, sizeof(number1), "%d",
                         uis->_.string_data.result_minsize);
            BIO_snprintf(number2, sizeof(number2), "%d",
                         uis->_.string_data.result_maxsize);

            if (l < uis->_.string_data.result_minsize) {
                ui->flags |= UI_FLAG_REDOABLE;
                UIerr(UI_F_UI_SET_RESULT, UI_R_RESULT_TOO_SMALL);
                ERR_add_error_data(5, "You must type in ",
                                   number1, " to ", number2, " characters");
                return -1;
            }
            if (l > uis->_.string_data.result_maxsize) {
                ui->flags |= UI_FLAG_REDOABLE;
                UIerr(UI_F_UI_SET_RESULT, UI_R_RESULT_TOO_LARGE);
                ERR_add_error_data(5, "You must type in ",
                                   number1, " to ", number2, " characters");
                return -1;
            }
        }

        if (!uis->result_buf) {
            UIerr(UI_F_UI_SET_RESULT, UI_R_NO_RESULT_BUFFER);
            return -1;
        }

        BUF_strlcpy(uis->result_buf, result,
                    uis->_.string_data.result_maxsize + 1);
        break;
    case UIT_BOOLEAN:
        {
            const char *p;

            if (!uis->result_buf) {
                UIerr(UI_F_UI_SET_RESULT, UI_R_NO_RESULT_BUFFER);
                return -1;
            }

            uis->result_buf[0] = '\0';
            for (p = result; *p; p++) {
                if (strchr(uis->_.boolean_data.ok_chars, *p)) {
                    uis->result_buf[0] = uis->_.boolean_data.ok_chars[0];
                    break;
                }
                if (strchr(uis->_.boolean_data.cancel_chars, *p)) {
                    uis->result_buf[0] = uis->_.boolean_data.cancel_chars[0];
                    break;
                }
            }
        }
    default:
        break;
    }
    return 0;
}