crypto/evp/names.c

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57
  58 #include <stdio.h>
  59 #include "internal/cryptlib.h"
  60 #include <openssl/evp.h>
  61 #include <openssl/objects.h>
  62 #include <openssl/x509.h>
  63 #include "internal/evp_int.h"
  64
  65 int EVP_add_cipher(const EVP_CIPHER *c)
  66 {
  67     int r;
  68
  69     if (c == NULL)
  70         return 0;
  71
  72     r = OBJ_NAME_add(OBJ_nid2sn(c->nid), OBJ_NAME_TYPE_CIPHER_METH,
  73                      (const char *)c);
  74     if (r == 0)
  75         return (0);
  76     check_defer(c->nid);
  77     r = OBJ_NAME_add(OBJ_nid2ln(c->nid), OBJ_NAME_TYPE_CIPHER_METH,
  78                      (const char *)c);
  79     return (r);
  80 }
  81
  82 int EVP_add_digest(const EVP_MD *md)
  83 {
  84     int r;
  85     const char *name;
  86
  87     name = OBJ_nid2sn(md->type);
  88     r = OBJ_NAME_add(name, OBJ_NAME_TYPE_MD_METH, (const char *)md);
  89     if (r == 0)
  90         return (0);
  91     check_defer(md->type);
  92     r = OBJ_NAME_add(OBJ_nid2ln(md->type), OBJ_NAME_TYPE_MD_METH,
  93                      (const char *)md);
  94     if (r == 0)
  95         return (0);
  96
  97     if (md->pkey_type && md->type != md->pkey_type) {
  98         r = OBJ_NAME_add(OBJ_nid2sn(md->pkey_type),
  99                          OBJ_NAME_TYPE_MD_METH | OBJ_NAME_ALIAS, name);
 100         if (r == 0)
 101             return (0);
 102         check_defer(md->pkey_type);
 103         r = OBJ_NAME_add(OBJ_nid2ln(md->pkey_type),
 104                          OBJ_NAME_TYPE_MD_METH | OBJ_NAME_ALIAS, name);
 105     }
 106     return (r);
 107 }
 108
 109 const EVP_CIPHER *EVP_get_cipherbyname(const char *name)
 110 {
 111     const EVP_CIPHER *cp;
 112
 113     if (!OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS, NULL))
 114         return NULL;
 115
 116     cp = (const EVP_CIPHER *)OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
 117     return (cp);
 118 }
 119
 120 const EVP_MD *EVP_get_digestbyname(const char *name)
 121 {
 122     const EVP_MD *cp;
 123
 124     if (!OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_DIGESTS, NULL))
 125         return NULL;
 126
 127     cp = (const EVP_MD *)OBJ_NAME_get(name, OBJ_NAME_TYPE_MD_METH);
 128     return (cp);
 129 }
 130
 131 void EVP_cleanup(void)
 132 {
 133     OBJ_NAME_cleanup(OBJ_NAME_TYPE_CIPHER_METH);
 134     OBJ_NAME_cleanup(OBJ_NAME_TYPE_MD_METH);
 135     /*
 136      * The above calls will only clean out the contents of the name hash
 137      * table, but not the hash table itself.  The following line does that
 138      * part.  -- Richard Levitte
 139      */
 140     OBJ_NAME_cleanup(-1);
 141
 142     EVP_PBE_cleanup();
 143     if (obj_cleanup_defer == 2) {
 144         obj_cleanup_defer = 0;
 145         OBJ_cleanup();
 146     }
 147     OBJ_sigid_free();
 148 }
 149
 150 struct doall_cipher {
 151     void *arg;
 152     void (*fn) (const EVP_CIPHER *ciph,
 153                 const char *from, const char *to, void *arg);
 154 };
 155
 156 static void do_all_cipher_fn(const OBJ_NAME *nm, void *arg)
 157 {
 158     struct doall_cipher *dc = arg;
 159     if (nm->alias)
 160         dc->fn(NULL, nm->name, nm->data, dc->arg);
 161     else
 162         dc->fn((const EVP_CIPHER *)nm->data, nm->name, NULL, dc->arg);
 163 }
 164
 165 void EVP_CIPHER_do_all(void (*fn) (const EVP_CIPHER *ciph,
 166                                    const char *from, const char *to, void *x),
 167                        void *arg)
 168 {
 169     struct doall_cipher dc;
 170
 171     /* Ignore errors */
 172     OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS, NULL);
 173
 174     dc.fn = fn;
 175     dc.arg = arg;
 176     OBJ_NAME_do_all(OBJ_NAME_TYPE_CIPHER_METH, do_all_cipher_fn, &dc);
 177 }
 178
 179 void EVP_CIPHER_do_all_sorted(void (*fn) (const EVP_CIPHER *ciph,
 180                                           const char *from, const char *to,
 181                                           void *x), void *arg)
 182 {
 183     struct doall_cipher dc;
 184
 185     /* Ignore errors */
 186     OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS, NULL);
 187
 188     dc.fn = fn;
 189     dc.arg = arg;
 190     OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, do_all_cipher_fn, &dc);
 191 }
 192
 193 struct doall_md {
 194     void *arg;
 195     void (*fn) (const EVP_MD *ciph,
 196                 const char *from, const char *to, void *arg);
 197 };
 198
 199 static void do_all_md_fn(const OBJ_NAME *nm, void *arg)
 200 {
 201     struct doall_md *dc = arg;
 202     if (nm->alias)
 203         dc->fn(NULL, nm->name, nm->data, dc->arg);
 204     else
 205         dc->fn((const EVP_MD *)nm->data, nm->name, NULL, dc->arg);
 206 }
 207
 208 void EVP_MD_do_all(void (*fn) (const EVP_MD *md,
 209                                const char *from, const char *to, void *x),
 210                    void *arg)
 211 {
 212     struct doall_md dc;
 213
 214     /* Ignore errors */
 215     OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_DIGESTS, NULL);
 216
 217     dc.fn = fn;
 218     dc.arg = arg;
 219     OBJ_NAME_do_all(OBJ_NAME_TYPE_MD_METH, do_all_md_fn, &dc);
 220 }
 221
 222 void EVP_MD_do_all_sorted(void (*fn) (const EVP_MD *md,
 223                                       const char *from, const char *to,
 224                                       void *x), void *arg)
 225 {
 226     struct doall_md dc;
 227
 228     OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_DIGESTS, NULL);
 229
 230     dc.fn = fn;
 231     dc.arg = arg;
 232     OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_MD_METH, do_all_md_fn, &dc);
 233 }