crypto/ui/ui_locl.h

   1 /*
   2  * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #ifndef HEADER_UI_LOCL_H
  11 # define HEADER_UI_LOCL_H
  12
  13 # include <openssl/ui.h>
  14 # include <openssl/crypto.h>
  15
  16 # ifdef _
  17 #  undef _
  18 # endif
  19
  20 struct ui_method_st {
  21     char *name;
  22     /*
  23      * All the functions return 1 or non-NULL for success and 0 or NULL for
  24      * failure
  25      */
  26     /*
  27      * Open whatever channel for this, be it the console, an X window or
  28      * whatever. This function should use the ex_data structure to save
  29      * intermediate data.
  30      */
  31     int (*ui_open_session) (UI *ui);
  32     int (*ui_write_string) (UI *ui, UI_STRING *uis);
  33     /*
  34      * Flush the output.  If a GUI dialog box is used, this function can be
  35      * used to actually display it.
  36      */
  37     int (*ui_flush) (UI *ui);
  38     int (*ui_read_string) (UI *ui, UI_STRING *uis);
  39     int (*ui_close_session) (UI *ui);
  40     /*
  41      * Construct a prompt in a user-defined manner.  object_desc is a textual
  42      * short description of the object, for example "pass phrase", and
  43      * object_name is the name of the object (might be a card name or a file
  44      * name. The returned string shall always be allocated on the heap with
  45      * OPENSSL_malloc(), and need to be free'd with OPENSSL_free().
  46      */
  47     char *(*ui_construct_prompt) (UI *ui, const char *object_desc,
  48                                   const char *object_name);
  49 };
  50
  51 struct ui_string_st {
  52     enum UI_string_types type;  /* Input */
  53     const char *out_string;     /* Input */
  54     int input_flags;            /* Flags from the user */
  55     /*
  56      * The following parameters are completely irrelevant for UIT_INFO, and
  57      * can therefore be set to 0 or NULL
  58      */
  59     char *result_buf;           /* Input and Output: If not NULL,
  60                                  * user-defined with size in result_maxsize.
  61                                  * Otherwise, it may be allocated by the UI
  62                                  * routine, meaning result_minsize is going
  63                                  * to be overwritten. */
  64     union {
  65         struct {
  66             int result_minsize; /* Input: minimum required size of the
  67                                  * result. */
  68             int result_maxsize; /* Input: maximum permitted size of the
  69                                  * result */
  70             const char *test_buf; /* Input: test string to verify against */
  71         } string_data;
  72         struct {
  73             const char *action_desc; /* Input */
  74             const char *ok_chars; /* Input */
  75             const char *cancel_chars; /* Input */
  76         } boolean_data;
  77     } _;
  78
  79 # define OUT_STRING_FREEABLE 0x01
  80     int flags;                  /* flags for internal use */
  81 };
  82
  83 struct ui_st {
  84     const UI_METHOD *meth;
  85     STACK_OF(UI_STRING) *strings; /* We might want to prompt for more than
  86                                    * one thing at a time, and with different
  87                                    * echoing status.  */
  88     void *user_data;
  89     CRYPTO_EX_DATA ex_data;
  90 # define UI_FLAG_REDOABLE        0x0001
  91 # define UI_FLAG_PRINT_ERRORS    0x0100
  92     int flags;
  93
  94     CRYPTO_RWLOCK *lock;
  95 };
  96
  97 #endif