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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;
      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_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;
      }

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;
      }

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