Correct PPTP server firewall rules chain.

[tomato/davidwu.git] / release / src / router / openssl / crypto / ui / ui_lib.c

/* crypto/ui/ui_lib.c -*- mode:C; c-file-style: "eay" -*- */
/* Written by Richard Levitte (richard@levitte.org) 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
 *    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>
#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;
        }