/*

 * Copyright 2001-2019 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the OpenSSL license (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

#include <string.h>

#include "internal/cryptlib.h"

#include <openssl/e_os2.h>

#include <openssl/buffer.h>

#include <openssl/ui.h>

#include <openssl/err.h>

#include "ui_local.h"

UI *UI_new(void)

{

    return UI_new_method(NULL);

}

UI *UI_new_method(const UI_METHOD *method)

{

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

    if (ret == NULL) {

        UIerr(UI_F_UI_NEW_METHOD, ERR_R_MALLOC_FAILURE);

        return NULL;

    }

    ret->lock = CRYPTO_THREAD_lock_new();

    if (ret->lock == NULL) {

        UIerr(UI_F_UI_NEW_METHOD, ERR_R_MALLOC_FAILURE);

        OPENSSL_free(ret);

        return NULL;

    }

    if (method == NULL)

        method = UI_get_default_method();

    if (method == NULL)

        method = UI_null();

    ret->meth = method;

    if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_UI, ret, &ret->ex_data)) {

        OPENSSL_free(ret);

        return NULL;

    }

    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;

        case UIT_NONE:

        case UIT_PROMPT:

        case UIT_VERIFY:

        case UIT_ERROR:

        case UIT_INFO:

            break;

        }

    }

    OPENSSL_free(uis);

}

void UI_free(UI *ui)

{

    if (ui == NULL)

        return;

    if ((ui->flags & UI_FLAG_DUPL_DATA) != 0) {

        ui->meth->ui_destroy_data(ui, ui->user_data);

    }

    sk_UI_STRING_pop_free(ui->strings, free_string);

    CRYPTO_free_ex_data(CRYPTO_EX_INDEX_UI, ui, &ui->ex_data);

    CRYPTO_THREAD_lock_free(ui->lock);

    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 = OPENSSL_malloc(sizeof(*ret))) != NULL) {

        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 != NULL) {

        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 adapt that */

            if (ret <= 0) {

                ret--;

                free_string(s);

            }

        } 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 != '\0'; p++) {

            if (strchr(cancel_chars, *p) != NULL) {

                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 != NULL) {

            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 adapt that

                 */

                if (ret <= 0) {

                    ret--;

                    free_string(s);

                }

            } 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 != NULL) {

        prompt_copy = OPENSSL_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 != NULL) {

        prompt_copy = OPENSSL_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 != NULL) {

        prompt_copy = OPENSSL_strdup(prompt);

        if (prompt_copy == NULL) {

            UIerr(UI_F_UI_DUP_INPUT_BOOLEAN, ERR_R_MALLOC_FAILURE);

            goto err;

        }

    }

    if (action_desc != NULL) {

        action_desc_copy = OPENSSL_strdup(action_desc);

        if (action_desc_copy == NULL) {

            UIerr(UI_F_UI_DUP_INPUT_BOOLEAN, ERR_R_MALLOC_FAILURE);

            goto err;

        }

    }

    if (ok_chars != NULL) {

        ok_chars_copy = OPENSSL_strdup(ok_chars);

        if (ok_chars_copy == NULL) {

            UIerr(UI_F_UI_DUP_INPUT_BOOLEAN, ERR_R_MALLOC_FAILURE);

            goto err;

        }

    }

    if (cancel_chars != NULL) {

        cancel_chars_copy = OPENSSL_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:

    OPENSSL_free(prompt_copy);

    OPENSSL_free(action_desc_copy);

    OPENSSL_free(ok_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 != NULL) {

        text_copy = OPENSSL_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 != NULL) {

        text_copy = OPENSSL_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 != NULL)

        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 != NULL)

            len += sizeof(prompt2) - 1 + strlen(object_name);

        len += sizeof(prompt3) - 1;

        if ((prompt = OPENSSL_malloc(len + 1)) == NULL) {

            UIerr(UI_F_UI_CONSTRUCT_PROMPT, ERR_R_MALLOC_FAILURE);

            return NULL;

        }

        OPENSSL_strlcpy(prompt, prompt1, len + 1);

        OPENSSL_strlcat(prompt, object_desc, len + 1);

        if (object_name != NULL) {

            OPENSSL_strlcat(prompt, prompt2, len + 1);

            OPENSSL_strlcat(prompt, object_name, len + 1);

        }

        OPENSSL_strlcat(prompt, prompt3, len + 1);

    }

    return prompt;

}

void *UI_add_user_data(UI *ui, void *user_data)

{

    void *old_data = ui->user_data;

    if ((ui->flags & UI_FLAG_DUPL_DATA) != 0) {

        ui->meth->ui_destroy_data(ui, old_data);

        old_data = NULL;

    }

    ui->user_data = user_data;

    ui->flags &= ~UI_FLAG_DUPL_DATA;

    return old_data;

}

int UI_dup_user_data(UI *ui, void *user_data)

{

    void *duplicate = NULL;

    if (ui->meth->ui_duplicate_data == NULL

        || ui->meth->ui_destroy_data == NULL) {

        UIerr(UI_F_UI_DUP_USER_DATA, UI_R_USER_DATA_DUPLICATION_UNSUPPORTED);

        return -1;

    }

    duplicate = ui->meth->ui_duplicate_data(ui, user_data);

    if (duplicate == NULL) {

        UIerr(UI_F_UI_DUP_USER_DATA, ERR_R_MALLOC_FAILURE);

        return -1;

    }

    (void)UI_add_user_data(ui, duplicate);

    ui->flags |= UI_FLAG_DUPL_DATA;

    return 0;

}

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));

}

int UI_get_result_length(UI *ui, int i)

{

    if (i < 0) {

        UIerr(UI_F_UI_GET_RESULT_LENGTH, UI_R_INDEX_TOO_SMALL);

        return -1;

    }

    if (i >= sk_UI_STRING_num(ui->strings)) {

        UIerr(UI_F_UI_GET_RESULT_LENGTH, UI_R_INDEX_TOO_LARGE);

        return -1;

    }

    return UI_get_result_string_length(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 != NULL

        && ui->meth->ui_write_string(ui, &uis) <= 0)

        return -1;

    return 0;

}

int UI_process(UI *ui)

{

    int i, ok = 0;

    const char *state = "processing";

    if (ui->meth->ui_open_session != NULL

        && ui->meth->ui_open_session(ui) <= 0) {

        state = "opening session";

        ok = -1;

        goto err;

    }

    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 != NULL

            && (ui->meth->ui_write_string(ui,

                                          sk_UI_STRING_value(ui->strings, i))

                <= 0))

        {

            state = "writing strings";

            ok = -1;

            goto err;

        }

    }

    if (ui->meth->ui_flush != NULL)

        switch (ui->meth->ui_flush(ui)) {

        case -1:               /* Interrupt/Cancel/something... */

            ui->flags &= ~UI_FLAG_REDOABLE;

            ok = -2;

            goto err;

        case 0:                /* Errors */

            state = "flushing";

            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 != NULL) {

            switch (ui->meth->ui_read_string(ui,

                                             sk_UI_STRING_value(ui->strings,

                                                                i))) {

            case -1:           /* Interrupt/Cancel/something... */

                ui->flags &= ~UI_FLAG_REDOABLE;

                ok = -2;

                goto err;

            case 0:            /* Errors */

                state = "reading strings";

                ok = -1;

                goto err;

            default:           /* Success */

                ok = 0;

                break;

            }

        }

    }

    state = NULL;

 err:

    if (ui->meth->ui_close_session != NULL

        && ui->meth->ui_close_session(ui) <= 0) {

        if (state == NULL)

            state = "closing session";

        ok = -1;

    }

    if (ok == -1) {

        UIerr(UI_F_UI_PROCESS, UI_R_PROCESSING_ERROR);

        ERR_add_error_data(2, "while ", state);

    }

    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_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);

}

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(const char *name)

{

    UI_METHOD *ui_method = NULL;

    if ((ui_method = OPENSSL_zalloc(sizeof(*ui_method))) == NULL

        || (ui_method->name = OPENSSL_strdup(name)) == NULL

        || !CRYPTO_new_ex_data(CRYPTO_EX_INDEX_UI_METHOD, ui_method,

                               &ui_method->ex_data)) {

        if (ui_method)

            OPENSSL_free(ui_method->name);

        OPENSSL_free(ui_method);

        UIerr(UI_F_UI_CREATE_METHOD, ERR_R_MALLOC_FAILURE);

        return NULL;

    }

    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)

{

    if (ui_method == NULL)

        return;

    CRYPTO_free_ex_data(CRYPTO_EX_INDEX_UI_METHOD, ui_method,

                        &ui_method->ex_data);

    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 != NULL) {

        method->ui_open_session = opener;

        return 0;

    }

    return -1;

}

int UI_method_set_writer(UI_METHOD *method,

                         int (*writer) (UI *ui, UI_STRING *uis))

{

    if (method != NULL) {

        method->ui_write_string = writer;

        return 0;

    }

    return -1;

}

int UI_method_set_flusher(UI_METHOD *method, int (*flusher) (UI *ui))

{

    if (method != NULL) {

        method->ui_flush = flusher;

        return 0;

    }

    return -1;

}

int UI_method_set_reader(UI_METHOD *method,

                         int (*reader) (UI *ui, UI_STRING *uis))

{

    if (method != NULL) {

        method->ui_read_string = reader;

        return 0;

    }

    return -1;

}

int UI_method_set_closer(UI_METHOD *method, int (*closer) (UI *ui))

{

    if (method != NULL) {

        method->ui_close_session = closer;

        return 0;

    }

    return -1;

}

int UI_method_set_data_duplicator(UI_METHOD *method,

                                  void *(*duplicator) (UI *ui, void *ui_data),

                                  void (*destructor)(UI *ui, void *ui_data))

{

    if (method != NULL) {

        method->ui_duplicate_data = duplicator;

        method->ui_destroy_data = destructor;

        return 0;

    }

    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 != NULL) {

        method->ui_construct_prompt = prompt_constructor;

        return 0;

    }

    return -1;

}

int UI_method_set_ex_data(UI_METHOD *method, int idx, void *data)

{

    return CRYPTO_set_ex_data(&method->ex_data, idx, data);

}

int (*UI_method_get_opener(const UI_METHOD *method)) (UI *)

{

    if (method != NULL)

        return method->ui_open_session;

    return NULL;

}

int (*UI_method_get_writer(const UI_METHOD *method)) (UI *, UI_STRING *)

{

    if (method != NULL)

        return method->ui_write_string;

    return NULL;

}

int (*UI_method_get_flusher(const UI_METHOD *method)) (UI *)

{

    if (method != NULL)

        return method->ui_flush;

    return NULL;

}

int (*UI_method_get_reader(const UI_METHOD *method)) (UI *, UI_STRING *)

{

    if (method != NULL)

        return method->ui_read_string;

    return NULL;

}

int (*UI_method_get_closer(const UI_METHOD *method)) (UI *)

{

    if (method != NULL)

        return method->ui_close_session;

    return NULL;

}

char *(*UI_method_get_prompt_constructor(const UI_METHOD *method))

    (UI *, const char *, const char *)

{

    if (method != NULL)

        return method->ui_construct_prompt;

    return NULL;

}

void *(*UI_method_get_data_duplicator(const UI_METHOD *method)) (UI *, void *)

{

    if (method != NULL)

        return method->ui_duplicate_data;

    return NULL;

}

void (*UI_method_get_data_destructor(const UI_METHOD *method)) (UI *, void *)

{

    if (method != NULL)

        return method->ui_destroy_data;

    return NULL;

}

const void *UI_method_get_ex_data(const UI_METHOD *method, int idx)

{

    return CRYPTO_get_ex_data(&method->ex_data, idx);

}

enum UI_string_types UI_get_string_type(UI_STRING *uis)

{

    return uis->type;

}

int UI_get_input_flags(UI_STRING *uis)

{

    return uis->input_flags;

}

const char *UI_get0_output_string(UI_STRING *uis)

{

    return uis->out_string;

}

const char *UI_get0_action_string(UI_STRING *uis)

{

    switch (uis->type) {

    case UIT_BOOLEAN:

        return uis->_.boolean_data.action_desc;

    case UIT_PROMPT:

    case UIT_NONE:

    case UIT_VERIFY:

    case UIT_INFO:

    case UIT_ERROR:

        break;

    }

    return NULL;

}

const char *UI_get0_result_string(UI_STRING *uis)

{

    switch (uis->type) {

    case UIT_PROMPT:

    case UIT_VERIFY:

        return uis->result_buf;

    case UIT_NONE:

    case UIT_BOOLEAN:

    case UIT_INFO:

    case UIT_ERROR:

        break;

    }

    return NULL;

}

int UI_get_result_string_length(UI_STRING *uis)

{

    switch (uis->type) {

    case UIT_PROMPT:

    case UIT_VERIFY:

        return uis->result_len;

    case UIT_NONE:

    case UIT_BOOLEAN:

    case UIT_INFO:

    case UIT_ERROR:

        break;

    }

    return -1;

}

const char *UI_get0_test_string(UI_STRING *uis)

{

    switch (uis->type) {

    case UIT_VERIFY:

        return uis->_.string_data.test_buf;

    case UIT_NONE:

    case UIT_BOOLEAN:

    case UIT_INFO:

    case UIT_ERROR:

    case UIT_PROMPT:

        break;

    }

    return NULL;

}

int UI_get_result_minsize(UI_STRING *uis)

{

    switch (uis->type) {

    case UIT_PROMPT:

    case UIT_VERIFY:

        return uis->_.string_data.result_minsize;

    case UIT_NONE:

    case UIT_INFO:

    case UIT_ERROR:

    case UIT_BOOLEAN:

        break;

    }

    return -1;

}

int UI_get_result_maxsize(UI_STRING *uis)

{

    switch (uis->type) {

    case UIT_PROMPT:

    case UIT_VERIFY:

        return uis->_.string_data.result_maxsize;

    case UIT_NONE:

    case UIT_INFO:

    case UIT_ERROR:

    case UIT_BOOLEAN:

        break;

    }

    return -1;

}

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

{

#if 0

    /*

     * This is placed here solely to preserve UI_F_UI_SET_RESULT

     * To be removed for OpenSSL 1.2.0