/* crypto/ui/ui.h -*- 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).
 *
 */

#ifndef HEADER_UI_LOCL_H
# define HEADER_UI_LOCL_H

# include <openssl/ui.h>
# include <openssl/crypto.h>

# ifdef _
#  undef _
# endif

struct ui_method_st {
    char *name;
    /*
     * All the functions return 1 or non-NULL for success and 0 or NULL for
     * failure
     */
    /*
     * Open whatever channel for this, be it the console, an X window or
     * whatever. This function should use the ex_data structure to save
     * intermediate data.
     */
    int (*ui_open_session) (UI *ui);
    int (*ui_write_string) (UI *ui, UI_STRING *uis);
    /*
     * Flush the output.  If a GUI dialog box is used, this function can be
     * used to actually display it.
     */
    int (*ui_flush) (UI *ui);
    int (*ui_read_string) (UI *ui, UI_STRING *uis);
    int (*ui_close_session) (UI *ui);
    /*
     * Construct a prompt in a user-defined manner.  object_desc is a textual
     * short description of the object, for example "pass phrase", and
     * object_name is the name of the object (might be a card name or a file
     * name. The returned string shall always be allocated on the heap with
     * OPENSSL_malloc(), and need to be free'd with OPENSSL_free().
     */
    char *(*ui_construct_prompt) (UI *ui, const char *object_desc,
                                  const char *object_name);
};

struct ui_string_st {
    enum UI_string_types type;  /* Input */
    const char *out_string;     /* Input */
    int input_flags;            /* Flags from the user */
    /*
     * The following parameters are completely irrelevant for UIT_INFO, and
     * can therefore be set to 0 or NULL
     */
    char *result_buf;           /* Input and Output: If not NULL,
                                 * user-defined with size in result_maxsize.
                                 * Otherwise, it may be allocated by the UI
                                 * routine, meaning result_minsize is going
                                 * to be overwritten. */
    union {
        struct {
            int result_minsize; /* Input: minimum required size of the
                                 * result. */
            int result_maxsize; /* Input: maximum permitted size of the
                                 * result */
            const char *test_buf; /* Input: test string to verify against */
        } string_data;
        struct {
            const char *action_desc; /* Input */
            const char *ok_chars; /* Input */
            const char *cancel_chars; /* Input */
        } boolean_data;
    } _;

# define OUT_STRING_FREEABLE 0x01
    int flags;                  /* flags for internal use */
};

struct ui_st {
    const UI_METHOD *meth;
    STACK_OF(UI_STRING) *strings; /* We might want to prompt for more than
                                   * one thing at a time, and with different
                                   * echoing status.  */
    void *user_data;
    CRYPTO_EX_DATA ex_data;
# define UI_FLAG_REDOABLE        0x0001
# define UI_FLAG_PRINT_ERRORS    0x0100
    int flags;
};

#endif
