ui_lib.c

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/* crypto/ui/ui_lib.c -*- mode:C; c-file-style: "eay" -*- */
/* Written by Richard Levitte ([email protected]) for the OpenSSL
 * project 2001.
 */
/* ====================================================================
 * Copyright (c) 2001 The OpenSSL Project.  All rights reserved.
 *
 * 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
 *    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 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
 *    [email protected].
 *
 * 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
 * ([email protected]).  This product includes software written by Tim
 * Hudson ([email protected]).
 *
 */

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

IMPLEMENT_STACK_OF(UI_STRING_ST)

static const UI_METHOD *default_UI_meth=NULL;

UI *UI_new(void)
    {
    return(UI_new_method(NULL));
    }

UI *UI_new_method(const UI_METHOD *method)
    {
    UI *ret;

    ret=(UI *)OPENSSL_malloc(sizeof(UI));
    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;

    ret->strings=NULL;
    ret->user_data=NULL;
    ret->flags=0;
    CRYPTO_new_ex_data(CRYPTO_EX_INDEX_UI, ret, &ret->ex_data);
    return ret;
    }

static void free_string(UI_STRING *uis)
    {
    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);
    }

void UI_free(UI *ui)
    {
    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);
    }

static int allocate_string_stack(UI *ui)
    {
    if (ui->strings == NULL)
        {
        ui->strings=sk_UI_STRING_new_null();
        if (ui->strings == NULL)
            {
            return -1;
            }
        }
    return 0;
    }

static UI_STRING *general_allocate_prompt(UI *ui, const char *prompt,
    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);
        }
    else if ((ret = (UI_STRING *)OPENSSL_malloc(sizeof(UI_STRING))))
        {
        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;
    }

static int general_allocate_string(UI *ui, const char *prompt,
    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;
    }

static int general_allocate_boolean(UI *ui,
    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.  */
int UI_add_input_string(UI *ui, const char *prompt, int flags,
    char *result_buf, int minsize, int maxsize)
    {
    return general_allocate_string(ui, prompt, 0,
        UIT_PROMPT, flags, result_buf, minsize, maxsize, NULL);
    }

/* Same as UI_add_input_string(), excepts it takes a copy of the prompt */
int UI_dup_input_string(UI *ui, const char *prompt, int flags,
    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);
    }

int UI_add_verify_string(UI *ui, const char *prompt, int flags,
    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);
    }

int UI_dup_verify_string(UI *ui, const char *prompt, int flags,
    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);
    }

int UI_add_input_boolean(UI *ui, const char *prompt, const char *action_desc,
    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);
    }

int UI_dup_input_boolean(UI *ui, const char *prompt, const char *action_desc,
    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);
 err:
    if (prompt_copy) OPENSSL_free(prompt_copy);
    if (action_desc_copy) OPENSSL_free(action_desc_copy);
    if (ok_chars_copy) OPENSSL_free(ok_chars_copy);
    if (cancel_chars_copy) OPENSSL_free(cancel_chars_copy);
    return -1;
    }

int UI_add_info_string(UI *ui, const char *text)
    {
    return general_allocate_string(ui, text, 0, UIT_INFO, 0, NULL, 0, 0,
        NULL);
    }

int UI_dup_info_string(UI *ui, const char *text)
    {
    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);
    }

int UI_add_error_string(UI *ui, const char *text)
    {
    return general_allocate_string(ui, text, 0, UIT_ERROR, 0, NULL, 0, 0,
        NULL);
    }

int UI_dup_error_string(UI *ui, const char *text)
    {
    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);
    }

char *UI_construct_prompt(UI *ui, const char *object_desc,
    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;

        prompt = (char *)OPENSSL_malloc(len + 1);
        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;
    }

void *UI_add_user_data(UI *ui, void *user_data)
    {
    void *old_data = ui->user_data;
    ui->user_data = user_data;
    return old_data;
    }

void *UI_get0_user_data(UI *ui)
    {
    return ui->user_data;
    }

const char *UI_get0_result(UI *ui, int i)
    {
    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));
    }

static int print_error(const char *str, size_t len, UI *ui)
    {
    UI_STRING uis;

    memset(&uis, 0, sizeof(uis));
    uis.type = UIT_ERROR;
    uis.out_string = str;

    if (ui->meth->ui_write_string
        && !ui->meth->ui_write_string(ui, &uis))
        return -1;
    return 0;
    }

int UI_process(UI *ui)
    {
    int i, ok=0;

    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:
        {
        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;
        }
    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;
    }

int UI_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_UI, argl, argp,
                new_func, dup_func, free_func);
        }

int UI_set_ex_data(UI *r, int idx, void *arg)
    {
    return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
    }

void *UI_get_ex_data(UI *r, int idx)
    {
    return(CRYPTO_get_ex_data(&r->ex_data,idx));
    }

void UI_set_default_method(const UI_METHOD *meth)
    {
    default_UI_meth=meth;
    }

const UI_METHOD *UI_get_default_method(void)
    {
    if (default_UI_meth == NULL)
        {
        default_UI_meth=UI_OpenSSL();
        }
    return default_UI_meth;
    }

const UI_METHOD *UI_get_method(UI *ui)
    {
    return ui->meth;
    }

const UI_METHOD *UI_set_method(UI *ui, const UI_METHOD *meth)
    {
    ui->meth=meth;
    return ui->meth;
    }


UI_METHOD *UI_create_method(char *name)
    {
    UI_METHOD *ui_method = (UI_METHOD *)OPENSSL_malloc(sizeof(UI_METHOD));

    if (ui_method)
        {
        memset(ui_method, 0, sizeof(*ui_method));
        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. */
void UI_destroy_method(UI_METHOD *ui_method)
    {
    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;
    }

enum UI_string_types UI_get_string_type(UI_STRING *uis)
    {
    if (!uis)
        return UIT_NONE;
    return uis->type;
    }

int UI_get_input_flags(UI_STRING *uis)
    {
    if (!uis)
        return 0;
    return uis->input_flags;
    }

const char *UI_get0_output_string(UI_STRING *uis)
    {
    if (!uis)
        return NULL;
    return uis->out_string;
    }

const char *UI_get0_action_string(UI_STRING *uis)
    {
    if (!uis)
        return NULL;
    switch(uis->type)
        {
    case UIT_PROMPT:
    case UIT_BOOLEAN:
        return uis->_.boolean_data.action_desc;
    default:
        return NULL;
        }
    }

const char *UI_get0_result_string(UI_STRING *uis)
    {
    if (!uis)
        return NULL;
    switch(uis->type)
        {
    case UIT_PROMPT:
    case UIT_VERIFY:
        return uis->result_buf;
    default:
        return NULL;
        }
    }

const char *UI_get0_test_string(UI_STRING *uis)
    {
    if (!uis)
        return NULL;
    switch(uis->type)
        {
    case UIT_VERIFY:
        return uis->_.string_data.test_buf;
    default:
        return NULL;
        }
    }

int UI_get_result_minsize(UI_STRING *uis)
    {
    if (!uis)
        return -1;
    switch(uis->type)
        {
    case UIT_PROMPT:
    case UIT_VERIFY:
        return uis->_.string_data.result_minsize;
    default:
        return -1;
        }
    }

int UI_get_result_maxsize(UI_STRING *uis)
    {
    if (!uis)
        return -1;
    switch(uis->type)
        {
    case UIT_PROMPT:
    case UIT_VERIFY:
        return uis->_.string_data.result_maxsize;
    default:
        return -1;
        }
    }

int UI_set_result(UI *ui, UI_STRING *uis, const char *result)
    {
    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;
    }