crypto/openssl-0.9.7e/crypto/engine/eng_int.h

   1 /* crypto/engine/eng_int.h */
   2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
   3  * project 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999-2001 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #ifndef HEADER_ENGINE_INT_H
  60 #define HEADER_ENGINE_INT_H
  61
  62 /* Take public definitions from engine.h */
  63 #include <openssl/engine.h>
  64
  65 #ifdef  __cplusplus
  66 extern "C" {
  67 #endif
  68
  69 /* If we compile with this symbol defined, then both reference counts in the
  70  * ENGINE structure will be monitored with a line of output on stderr for each
  71  * change. This prints the engine's pointer address (truncated to unsigned int),
  72  * "struct" or "funct" to indicate the reference type, the before and after
  73  * reference count, and the file:line-number pair. The "engine_ref_debug"
  74  * statements must come *after* the change. */
  75 #ifdef ENGINE_REF_COUNT_DEBUG
  76
  77 #define engine_ref_debug(e, isfunct, diff) \
  78         fprintf(stderr, "engine: %08x %s from %d to %d (%s:%d)\n", \
  79                 (unsigned int)(e), (isfunct ? "funct" : "struct"), \
  80                 ((isfunct) ? ((e)->funct_ref - (diff)) : ((e)->struct_ref - (diff))), \
  81                 ((isfunct) ? (e)->funct_ref : (e)->struct_ref), \
  82                 (__FILE__), (__LINE__));
  83
  84 #else
  85
  86 #define engine_ref_debug(e, isfunct, diff)
  87
  88 #endif
  89
  90 /* Any code that will need cleanup operations should use these functions to
  91  * register callbacks. ENGINE_cleanup() will call all registered callbacks in
  92  * order. NB: both the "add" functions assume CRYPTO_LOCK_ENGINE to already be
  93  * held (in "write" mode). */
  94 typedef void (ENGINE_CLEANUP_CB)(void);
  95 typedef struct st_engine_cleanup_item
  96         {
  97         ENGINE_CLEANUP_CB *cb;
  98         } ENGINE_CLEANUP_ITEM;
  99 DECLARE_STACK_OF(ENGINE_CLEANUP_ITEM)
 100 void engine_cleanup_add_first(ENGINE_CLEANUP_CB *cb);
 101 void engine_cleanup_add_last(ENGINE_CLEANUP_CB *cb);
 102
 103 /* We need stacks of ENGINEs for use in eng_table.c */
 104 DECLARE_STACK_OF(ENGINE)
 105
 106 /* If this symbol is defined then engine_table_select(), the function that is
 107  * used by RSA, DSA (etc) code to select registered ENGINEs, cache defaults and
 108  * functional references (etc), will display debugging summaries to stderr. */
 109 /* #define ENGINE_TABLE_DEBUG */
 110
 111 /* This represents an implementation table. Dependent code should instantiate it
 112  * as a (ENGINE_TABLE *) pointer value set initially to NULL. */
 113 typedef struct st_engine_table ENGINE_TABLE;
 114 int engine_table_register(ENGINE_TABLE **table, ENGINE_CLEANUP_CB *cleanup,
 115                 ENGINE *e, const int *nids, int num_nids, int setdefault);
 116 void engine_table_unregister(ENGINE_TABLE **table, ENGINE *e);
 117 void engine_table_cleanup(ENGINE_TABLE **table);
 118 #ifndef ENGINE_TABLE_DEBUG
 119 ENGINE *engine_table_select(ENGINE_TABLE **table, int nid);
 120 #else
 121 ENGINE *engine_table_select_tmp(ENGINE_TABLE **table, int nid, const char *f, int l);
 122 #define engine_table_select(t,n) engine_table_select_tmp(t,n,__FILE__,__LINE__)
 123 #endif
 124
 125 /* Internal versions of API functions that have control over locking. These are
 126  * used between C files when functionality needs to be shared but the caller may
 127  * already be controlling of the CRYPTO_LOCK_ENGINE lock. */
 128 int engine_unlocked_init(ENGINE *e);
 129 int engine_unlocked_finish(ENGINE *e, int unlock_for_handlers);
 130 int engine_free_util(ENGINE *e, int locked);
 131
 132 /* This function will reset all "set"able values in an ENGINE to NULL. This
 133  * won't touch reference counts or ex_data, but is equivalent to calling all the
 134  * ENGINE_set_***() functions with a NULL value. */
 135 void engine_set_all_null(ENGINE *e);
 136
 137 /* NB: Bitwise OR-able values for the "flags" variable in ENGINE are now exposed
 138  * in engine.h. */
 139
 140 /* This is a structure for storing implementations of various crypto
 141  * algorithms and functions. */
 142 struct engine_st
 143         {
 144         const char *id;
 145         const char *name;
 146         const RSA_METHOD *rsa_meth;
 147         const DSA_METHOD *dsa_meth;
 148         const DH_METHOD *dh_meth;
 149         const RAND_METHOD *rand_meth;
 150         /* Cipher handling is via this callback */
 151         ENGINE_CIPHERS_PTR ciphers;
 152         /* Digest handling is via this callback */
 153         ENGINE_DIGESTS_PTR digests;
 154
 155
 156         ENGINE_GEN_INT_FUNC_PTR destroy;
 157
 158         ENGINE_GEN_INT_FUNC_PTR init;
 159         ENGINE_GEN_INT_FUNC_PTR finish;
 160         ENGINE_CTRL_FUNC_PTR ctrl;
 161         ENGINE_LOAD_KEY_PTR load_privkey;
 162         ENGINE_LOAD_KEY_PTR load_pubkey;
 163
 164         const ENGINE_CMD_DEFN *cmd_defns;
 165         int flags;
 166         /* reference count on the structure itself */
 167         int struct_ref;
 168         /* reference count on usability of the engine type. NB: This
 169          * controls the loading and initialisation of any functionlity
 170          * required by this engine, whereas the previous count is
 171          * simply to cope with (de)allocation of this structure. Hence,
 172          * running_ref <= struct_ref at all times. */
 173         int funct_ref;
 174         /* A place to store per-ENGINE data */
 175         CRYPTO_EX_DATA ex_data;
 176         /* Used to maintain the linked-list of engines. */
 177         struct engine_st *prev;
 178         struct engine_st *next;
 179         };
 180
 181 #ifdef  __cplusplus
 182 }
 183 #endif
 184
 185 #endif /* HEADER_ENGINE_INT_H */