crypto/asn1/ameth_lib.c

   1 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   2  * project 2006.
   3  */
   4 /* ====================================================================
   5  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  *
  19  * 3. All advertising materials mentioning features or use of this
  20  *    software must display the following acknowledgment:
  21  *    "This product includes software developed by the OpenSSL Project
  22  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  23  *
  24  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  25  *    endorse or promote products derived from this software without
  26  *    prior written permission. For written permission, please contact
  27  *    licensing@OpenSSL.org.
  28  *
  29  * 5. Products derived from this software may not be called "OpenSSL"
  30  *    nor may "OpenSSL" appear in their names without prior written
  31  *    permission of the OpenSSL Project.
  32  *
  33  * 6. Redistributions of any form whatsoever must retain the following
  34  *    acknowledgment:
  35  *    "This product includes software developed by the OpenSSL Project
  36  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  37  *
  38  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  39  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  40  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  41  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  42  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  43  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  44  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  45  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  46  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  47  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  48  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  49  * OF THE POSSIBILITY OF SUCH DAMAGE.
  50  * ====================================================================
  51  *
  52  * This product includes cryptographic software written by Eric Young
  53  * (eay@cryptsoft.com).  This product includes software written by Tim
  54  * Hudson (tjh@cryptsoft.com).
  55  *
  56  */
  57
  58 #include <stdio.h>
  59 #include "cryptlib.h"
  60 #include <openssl/asn1t.h>
  61 #include <openssl/x509.h>
  62 #include <openssl/ec.h>
  63 #include "asn1_locl.h"
  64
  65 extern const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[];
  66 extern const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[];
  67 extern const EVP_PKEY_ASN1_METHOD dh_asn1_meth;
  68 extern const EVP_PKEY_ASN1_METHOD eckey_asn1_meth;
  69
  70 /* Keep this sorted in type order !! */
  71 const EVP_PKEY_ASN1_METHOD *standard_methods[] =
  72         {
  73 #ifndef OPENSSL_NO_RSA
  74         &rsa_asn1_meths[0],
  75         &rsa_asn1_meths[1],
  76 #endif
  77 #ifndef OPENSSL_NO_DH
  78         &dh_asn1_meth,
  79 #endif
  80 #ifndef OPENSSL_NO_DSA
  81         &dsa_asn1_meths[0],
  82         &dsa_asn1_meths[1],
  83         &dsa_asn1_meths[2],
  84         &dsa_asn1_meths[3],
  85         &dsa_asn1_meths[4],
  86 #endif
  87 #ifndef OPENSSL_NO_EC
  88         &eckey_asn1_meth
  89 #endif
  90         };
  91
  92 typedef int sk_cmp_fn_type(const char * const *a, const char * const *b);
  93 static STACK *app_methods = NULL;
  94
  95
  96
  97 #ifdef TEST
  98 void main()
  99         {
 100         int i;
 101         for (i = 0;
 102                 i < sizeof(standard_methods)/sizeof(EVP_PKEY_ASN1_METHOD *);
 103                 i++)
 104                 fprintf(stderr, "Number %d id=%d (%s)\n", i,
 105                         standard_methods[i]->pkey_id,
 106                         OBJ_nid2sn(standard_methods[i]->pkey_id));
 107         }
 108 #endif
 109
 110 static int ameth_cmp(const EVP_PKEY_ASN1_METHOD * const *a,
 111                 const EVP_PKEY_ASN1_METHOD * const *b)
 112         {
 113         return ((*a)->pkey_id - (*b)->pkey_id);
 114         }
 115
 116 int EVP_PKEY_asn1_get_count(void)
 117         {
 118         int num = sizeof(standard_methods)/sizeof(EVP_PKEY_ASN1_METHOD *);
 119         if (app_methods)
 120                 num += sk_num(app_methods);
 121         return num;
 122         }
 123
 124 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_get0(int idx)
 125         {
 126         int num = sizeof(standard_methods)/sizeof(EVP_PKEY_ASN1_METHOD *);
 127         if (idx < 0)
 128                 return NULL;
 129         if (idx < num)
 130                 return standard_methods[idx];
 131         idx -= num;
 132         return (const EVP_PKEY_ASN1_METHOD *)sk_value(app_methods, idx);
 133         }
 134
 135 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find(int type)
 136         {
 137         EVP_PKEY_ASN1_METHOD tmp, *t = &tmp, **ret;
 138         tmp.pkey_id = type;
 139         if (app_methods)
 140                 {
 141                 int idx;
 142                 idx = sk_find(app_methods, (char *)&t);
 143                 if (idx > 0)
 144                         return (EVP_PKEY_ASN1_METHOD *)
 145                                 sk_value(app_methods, idx);
 146                 }
 147         ret = (EVP_PKEY_ASN1_METHOD **) OBJ_bsearch((char *)&t,
 148                         (char *)standard_methods,
 149                         sizeof(standard_methods)/sizeof(EVP_PKEY_ASN1_METHOD *),
 150                         sizeof(EVP_PKEY_ASN1_METHOD *),
 151                         (int (*)(const void *, const void *))ameth_cmp);
 152         if (!ret || !*ret)
 153                 return NULL;
 154         if ((*ret)->pkey_flags & ASN1_PKEY_ALIAS)
 155                 return EVP_PKEY_asn1_find((*ret)->pkey_base_id);
 156         return *ret;
 157         }
 158
 159 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find_str(const char *str, int len)
 160         {
 161         int i;
 162         const EVP_PKEY_ASN1_METHOD *ameth;
 163         for (i = 0; i < EVP_PKEY_asn1_get_count(); i++)
 164                 {
 165                 ameth = EVP_PKEY_asn1_get0(i);
 166                 if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
 167                         continue;
 168                 if ((strlen(ameth->pem_str) == len) &&
 169                         !strncasecmp(ameth->pem_str, str, len))
 170                         return ameth;
 171                 }
 172         return NULL;
 173         }
 174
 175 int EVP_PKEY_asn1_add(const EVP_PKEY_ASN1_METHOD *ameth)
 176         {
 177         if (app_methods == NULL)
 178                 {
 179                 app_methods = sk_new((sk_cmp_fn_type *)ameth_cmp);
 180                 if (!app_methods)
 181                         return 0;
 182                 }
 183         if (!sk_push(app_methods, (char *)ameth))
 184                 return 0;
 185         sk_sort(app_methods);
 186         return 1;
 187         }
 188
 189 EVP_PKEY_ASN1_METHOD* EVP_PKEY_asn1_new(int id,
 190                                         const char *pem_str, const char *info)
 191         {
 192         EVP_PKEY_ASN1_METHOD *ameth;
 193         ameth = OPENSSL_malloc(sizeof(EVP_PKEY_ASN1_METHOD));
 194         if (!ameth)
 195                 return NULL;
 196
 197         ameth->pkey_id = id;
 198         ameth->pkey_base_id = id;
 199         ameth->pkey_flags = ASN1_PKEY_DYNAMIC;
 200
 201         if (info)
 202                 {
 203                 ameth->info = BUF_strdup(info);
 204                 if (!ameth->info)
 205                         goto err;
 206                 }
 207
 208         if (pem_str)
 209                 {
 210                 ameth->pem_str = BUF_strdup(pem_str);
 211                 if (!ameth->pem_str)
 212                         goto err;
 213                 }
 214
 215         ameth->pub_decode = 0;
 216         ameth->pub_encode = 0;
 217         ameth->pub_cmp = 0;
 218         ameth->pub_print = 0;
 219
 220         ameth->priv_decode = 0;
 221         ameth->priv_encode = 0;
 222         ameth->priv_print = 0;
 223
 224         ameth->pkey_size = 0;
 225         ameth->pkey_bits = 0;
 226
 227         ameth->param_decode = 0;
 228         ameth->param_encode = 0;
 229         ameth->param_missing = 0;
 230         ameth->param_copy = 0;
 231         ameth->param_cmp = 0;
 232         ameth->param_print = 0;
 233
 234         ameth->pkey_free = 0;
 235         ameth->pkey_ctrl = 0;
 236
 237         return ameth;
 238
 239         err:
 240
 241         EVP_PKEY_asn1_free(ameth);
 242         return NULL;
 243
 244         }
 245
 246 void EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD *ameth)
 247         {
 248         if (ameth && (ameth->pkey_flags & ASN1_PKEY_DYNAMIC))
 249                 {
 250                 if (ameth->pem_str)
 251                         OPENSSL_free(ameth->pem_str);
 252                 if (ameth->info)
 253                         OPENSSL_free(ameth->info);
 254                 OPENSSL_free(ameth);
 255                 }
 256         }
 257
 258 void EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD *ameth,
 259                 int (*pub_decode)(EVP_PKEY *pk, X509_PUBKEY *pub),
 260                 int (*pub_encode)(X509_PUBKEY *pub, const EVP_PKEY *pk),
 261                 int (*pub_cmp)(const EVP_PKEY *a, const EVP_PKEY *b),
 262                 int (*pub_print)(BIO *out, const EVP_PKEY *pkey, int indent,
 263                                                         ASN1_PCTX *pctx),
 264                 int (*pkey_size)(const EVP_PKEY *pk),
 265                 int (*pkey_bits)(const EVP_PKEY *pk))
 266         {
 267         ameth->pub_decode = pub_decode;
 268         ameth->pub_encode = pub_encode;
 269         ameth->pub_cmp = pub_cmp;
 270         ameth->pub_print = pub_print;
 271         ameth->pkey_size = pkey_size;
 272         ameth->pkey_bits = pkey_bits;
 273         }
 274
 275 void EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD *ameth,
 276                 int (*priv_decode)(EVP_PKEY *pk, PKCS8_PRIV_KEY_INFO *p8inf),
 277                 int (*priv_encode)(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pk),
 278                 int (*priv_print)(BIO *out, const EVP_PKEY *pkey, int indent,
 279                                                         ASN1_PCTX *pctx))
 280         {
 281         ameth->priv_decode = priv_decode;
 282         ameth->priv_encode = priv_encode;
 283         ameth->priv_print = priv_print;
 284         }
 285
 286 void EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD *ameth,
 287                 int (*param_decode)(EVP_PKEY *pkey,
 288                                 const unsigned char **pder, int derlen),
 289                 int (*param_encode)(const EVP_PKEY *pkey, unsigned char **pder),
 290                 int (*param_missing)(const EVP_PKEY *pk),
 291                 int (*param_copy)(EVP_PKEY *to, const EVP_PKEY *from),
 292                 int (*param_cmp)(const EVP_PKEY *a, const EVP_PKEY *b),
 293                 int (*param_print)(BIO *out, const EVP_PKEY *pkey, int indent,
 294                                                         ASN1_PCTX *pctx))
 295         {
 296         ameth->param_decode = param_decode;
 297         ameth->param_encode = param_encode;
 298         ameth->param_missing = param_missing;
 299         ameth->param_copy = param_copy;
 300         ameth->param_cmp = param_cmp;
 301         ameth->param_print = param_print;
 302         }
 303
 304 void EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD *ameth,
 305                 void (*pkey_free)(EVP_PKEY *pkey))
 306         {
 307         ameth->pkey_free = pkey_free;
 308         }
 309
 310 void EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD *ameth,
 311                 void (*pkey_ctrl)(EVP_PKEY *pkey, int op,
 312                                                         long arg1, void *arg2))
 313         {
 314         ameth->pkey_ctrl = pkey_ctrl;
 315         }