crypto/asn1/ameth_lib.c

   1 /*
   2  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   3  * 2006.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2006 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 #include <stdio.h>
  60 #include "internal/cryptlib.h"
  61 #include <openssl/asn1t.h>
  62 #include <openssl/x509.h>
  63 #ifndef OPENSSL_NO_ENGINE
  64 # include <openssl/engine.h>
  65 #endif
  66 #include "internal/asn1_int.h"
  67 #include "internal/evp_int.h"
  68
  69 /* Keep this sorted in type order !! */
  70 static const EVP_PKEY_ASN1_METHOD *standard_methods[] = {
  71 #ifndef OPENSSL_NO_RSA
  72     &rsa_asn1_meths[0],
  73     &rsa_asn1_meths[1],
  74 #endif
  75 #ifndef OPENSSL_NO_DH
  76     &dh_asn1_meth,
  77 #endif
  78 #ifndef OPENSSL_NO_DSA
  79     &dsa_asn1_meths[0],
  80     &dsa_asn1_meths[1],
  81     &dsa_asn1_meths[2],
  82     &dsa_asn1_meths[3],
  83     &dsa_asn1_meths[4],
  84 #endif
  85 #ifndef OPENSSL_NO_EC
  86     &eckey_asn1_meth,
  87 #endif
  88     &hmac_asn1_meth,
  89     &cmac_asn1_meth,
  90 #ifndef OPENSSL_NO_DH
  91     &dhx_asn1_meth
  92 #endif
  93 };
  94
  95 typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
  96 static STACK_OF(EVP_PKEY_ASN1_METHOD) *app_methods = NULL;
  97
  98 #ifdef TEST
  99 void main()
 100 {
 101     int i;
 102     for (i = 0; i < OSSL_NELEM(standard_methods); i++)
 103         fprintf(stderr, "Number %d id=%d (%s)\n", i,
 104                 standard_methods[i]->pkey_id,
 105                 OBJ_nid2sn(standard_methods[i]->pkey_id));
 106 }
 107 #endif
 108
 109 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *,
 110                            const EVP_PKEY_ASN1_METHOD *, ameth);
 111
 112 static int ameth_cmp(const EVP_PKEY_ASN1_METHOD *const *a,
 113                      const EVP_PKEY_ASN1_METHOD *const *b)
 114 {
 115     return ((*a)->pkey_id - (*b)->pkey_id);
 116 }
 117
 118 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *,
 119                              const EVP_PKEY_ASN1_METHOD *, ameth);
 120
 121 int EVP_PKEY_asn1_get_count(void)
 122 {
 123     int num = OSSL_NELEM(standard_methods);
 124     if (app_methods)
 125         num += sk_EVP_PKEY_ASN1_METHOD_num(app_methods);
 126     return num;
 127 }
 128
 129 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_get0(int idx)
 130 {
 131     int num = OSSL_NELEM(standard_methods);
 132     if (idx < 0)
 133         return NULL;
 134     if (idx < num)
 135         return standard_methods[idx];
 136     idx -= num;
 137     return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx);
 138 }
 139
 140 static const EVP_PKEY_ASN1_METHOD *pkey_asn1_find(int type)
 141 {
 142     EVP_PKEY_ASN1_METHOD tmp;
 143     const EVP_PKEY_ASN1_METHOD *t = &tmp, **ret;
 144     tmp.pkey_id = type;
 145     if (app_methods) {
 146         int idx;
 147         idx = sk_EVP_PKEY_ASN1_METHOD_find(app_methods, &tmp);
 148         if (idx >= 0)
 149             return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx);
 150     }
 151     ret = OBJ_bsearch_ameth(&t, standard_methods, OSSL_NELEM(standard_methods));
 152     if (!ret || !*ret)
 153         return NULL;
 154     return *ret;
 155 }
 156
 157 /*
 158  * Find an implementation of an ASN1 algorithm. If 'pe' is not NULL also
 159  * search through engines and set *pe to a functional reference to the engine
 160  * implementing 'type' or NULL if no engine implements it.
 161  */
 162
 163 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find(ENGINE **pe, int type)
 164 {
 165     const EVP_PKEY_ASN1_METHOD *t;
 166
 167     for (;;) {
 168         t = pkey_asn1_find(type);
 169         if (!t || !(t->pkey_flags & ASN1_PKEY_ALIAS))
 170             break;
 171         type = t->pkey_base_id;
 172     }
 173     if (pe) {
 174 #ifndef OPENSSL_NO_ENGINE
 175         ENGINE *e;
 176         /* type will contain the final unaliased type */
 177         e = ENGINE_get_pkey_asn1_meth_engine(type);
 178         if (e) {
 179             *pe = e;
 180             return ENGINE_get_pkey_asn1_meth(e, type);
 181         }
 182 #endif
 183         *pe = NULL;
 184     }
 185     return t;
 186 }
 187
 188 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find_str(ENGINE **pe,
 189                                                    const char *str, int len)
 190 {
 191     int i;
 192     const EVP_PKEY_ASN1_METHOD *ameth;
 193     if (len == -1)
 194         len = strlen(str);
 195     if (pe) {
 196 #ifndef OPENSSL_NO_ENGINE
 197         ENGINE *e;
 198         ameth = ENGINE_pkey_asn1_find_str(&e, str, len);
 199         if (ameth) {
 200             /*
 201              * Convert structural into functional reference
 202              */
 203             if (!ENGINE_init(e))
 204                 ameth = NULL;
 205             ENGINE_free(e);
 206             *pe = e;
 207             return ameth;
 208         }
 209 #endif
 210         *pe = NULL;
 211     }
 212     for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) {
 213         ameth = EVP_PKEY_asn1_get0(i);
 214         if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
 215             continue;
 216         if (((int)strlen(ameth->pem_str) == len)
 217             && (strncasecmp(ameth->pem_str, str, len) == 0))
 218             return ameth;
 219     }
 220     return NULL;
 221 }
 222
 223 int EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD *ameth)
 224 {
 225     if (app_methods == NULL) {
 226         app_methods = sk_EVP_PKEY_ASN1_METHOD_new(ameth_cmp);
 227         if (app_methods == NULL)
 228             return 0;
 229     }
 230     if (!sk_EVP_PKEY_ASN1_METHOD_push(app_methods, ameth))
 231         return 0;
 232     sk_EVP_PKEY_ASN1_METHOD_sort(app_methods);
 233     return 1;
 234 }
 235
 236 int EVP_PKEY_asn1_add_alias(int to, int from)
 237 {
 238     EVP_PKEY_ASN1_METHOD *ameth;
 239     ameth = EVP_PKEY_asn1_new(from, ASN1_PKEY_ALIAS, NULL, NULL);
 240     if (ameth == NULL)
 241         return 0;
 242     ameth->pkey_base_id = to;
 243     if (!EVP_PKEY_asn1_add0(ameth)) {
 244         EVP_PKEY_asn1_free(ameth);
 245         return 0;
 246     }
 247     return 1;
 248 }
 249
 250 int EVP_PKEY_asn1_get0_info(int *ppkey_id, int *ppkey_base_id,
 251                             int *ppkey_flags, const char **pinfo,
 252                             const char **ppem_str,
 253                             const EVP_PKEY_ASN1_METHOD *ameth)
 254 {
 255     if (!ameth)
 256         return 0;
 257     if (ppkey_id)
 258         *ppkey_id = ameth->pkey_id;
 259     if (ppkey_base_id)
 260         *ppkey_base_id = ameth->pkey_base_id;
 261     if (ppkey_flags)
 262         *ppkey_flags = ameth->pkey_flags;
 263     if (pinfo)
 264         *pinfo = ameth->info;
 265     if (ppem_str)
 266         *ppem_str = ameth->pem_str;
 267     return 1;
 268 }
 269
 270 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_get0_asn1(EVP_PKEY *pkey)
 271 {
 272     return pkey->ameth;
 273 }
 274
 275 EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_new(int id, int flags,
 276                                         const char *pem_str, const char *info)
 277 {
 278     EVP_PKEY_ASN1_METHOD *ameth = OPENSSL_zalloc(sizeof(*ameth));
 279
 280     if (ameth == NULL)
 281         return NULL;
 282
 283     ameth->pkey_id = id;
 284     ameth->pkey_base_id = id;
 285     ameth->pkey_flags = flags | ASN1_PKEY_DYNAMIC;
 286
 287     if (info) {
 288         ameth->info = OPENSSL_strdup(info);
 289         if (!ameth->info)
 290             goto err;
 291     }
 292
 293     if (pem_str) {
 294         ameth->pem_str = OPENSSL_strdup(pem_str);
 295         if (!ameth->pem_str)
 296             goto err;
 297     }
 298
 299     return ameth;
 300
 301  err:
 302     EVP_PKEY_asn1_free(ameth);
 303     return NULL;
 304
 305 }
 306
 307 void EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD *dst,
 308                         const EVP_PKEY_ASN1_METHOD *src)
 309 {
 310
 311     dst->pub_decode = src->pub_decode;
 312     dst->pub_encode = src->pub_encode;
 313     dst->pub_cmp = src->pub_cmp;
 314     dst->pub_print = src->pub_print;
 315
 316     dst->priv_decode = src->priv_decode;
 317     dst->priv_encode = src->priv_encode;
 318     dst->priv_print = src->priv_print;
 319
 320     dst->old_priv_encode = src->old_priv_encode;
 321     dst->old_priv_decode = src->old_priv_decode;
 322
 323     dst->pkey_size = src->pkey_size;
 324     dst->pkey_bits = src->pkey_bits;
 325
 326     dst->param_decode = src->param_decode;
 327     dst->param_encode = src->param_encode;
 328     dst->param_missing = src->param_missing;
 329     dst->param_copy = src->param_copy;
 330     dst->param_cmp = src->param_cmp;
 331     dst->param_print = src->param_print;
 332
 333     dst->pkey_free = src->pkey_free;
 334     dst->pkey_ctrl = src->pkey_ctrl;
 335
 336     dst->item_sign = src->item_sign;
 337     dst->item_verify = src->item_verify;
 338
 339 }
 340
 341 void EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD *ameth)
 342 {
 343     if (ameth && (ameth->pkey_flags & ASN1_PKEY_DYNAMIC)) {
 344         OPENSSL_free(ameth->pem_str);
 345         OPENSSL_free(ameth->info);
 346         OPENSSL_free(ameth);
 347     }
 348 }
 349
 350 void EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD *ameth,
 351                               int (*pub_decode) (EVP_PKEY *pk,
 352                                                  X509_PUBKEY *pub),
 353                               int (*pub_encode) (X509_PUBKEY *pub,
 354                                                  const EVP_PKEY *pk),
 355                               int (*pub_cmp) (const EVP_PKEY *a,
 356                                               const EVP_PKEY *b),
 357                               int (*pub_print) (BIO *out,
 358                                                 const EVP_PKEY *pkey,
 359                                                 int indent, ASN1_PCTX *pctx),
 360                               int (*pkey_size) (const EVP_PKEY *pk),
 361                               int (*pkey_bits) (const EVP_PKEY *pk))
 362 {
 363     ameth->pub_decode = pub_decode;
 364     ameth->pub_encode = pub_encode;
 365     ameth->pub_cmp = pub_cmp;
 366     ameth->pub_print = pub_print;
 367     ameth->pkey_size = pkey_size;
 368     ameth->pkey_bits = pkey_bits;
 369 }
 370
 371 void EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD *ameth,
 372                                int (*priv_decode) (EVP_PKEY *pk,
 373                                                    PKCS8_PRIV_KEY_INFO
 374                                                    *p8inf),
 375                                int (*priv_encode) (PKCS8_PRIV_KEY_INFO *p8,
 376                                                    const EVP_PKEY *pk),
 377                                int (*priv_print) (BIO *out,
 378                                                   const EVP_PKEY *pkey,
 379                                                   int indent,
 380                                                   ASN1_PCTX *pctx))
 381 {
 382     ameth->priv_decode = priv_decode;
 383     ameth->priv_encode = priv_encode;
 384     ameth->priv_print = priv_print;
 385 }
 386
 387 void EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD *ameth,
 388                              int (*param_decode) (EVP_PKEY *pkey,
 389                                                   const unsigned char **pder,
 390                                                   int derlen),
 391                              int (*param_encode) (const EVP_PKEY *pkey,
 392                                                   unsigned char **pder),
 393                              int (*param_missing) (const EVP_PKEY *pk),
 394                              int (*param_copy) (EVP_PKEY *to,
 395                                                 const EVP_PKEY *from),
 396                              int (*param_cmp) (const EVP_PKEY *a,
 397                                                const EVP_PKEY *b),
 398                              int (*param_print) (BIO *out,
 399                                                  const EVP_PKEY *pkey,
 400                                                  int indent, ASN1_PCTX *pctx))
 401 {
 402     ameth->param_decode = param_decode;
 403     ameth->param_encode = param_encode;
 404     ameth->param_missing = param_missing;
 405     ameth->param_copy = param_copy;
 406     ameth->param_cmp = param_cmp;
 407     ameth->param_print = param_print;
 408 }
 409
 410 void EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD *ameth,
 411                             void (*pkey_free) (EVP_PKEY *pkey))
 412 {
 413     ameth->pkey_free = pkey_free;
 414 }
 415
 416 void EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD *ameth,
 417                             int (*pkey_ctrl) (EVP_PKEY *pkey, int op,
 418                                               long arg1, void *arg2))
 419 {
 420     ameth->pkey_ctrl = pkey_ctrl;
 421 }
 422
 423 void EVP_PKEY_asn1_set_security_bits(EVP_PKEY_ASN1_METHOD *ameth,
 424                                      int (*pkey_security_bits) (const EVP_PKEY
 425                                                                 *pk))
 426 {
 427     ameth->pkey_security_bits = pkey_security_bits;
 428 }
 429
 430 void EVP_PKEY_asn1_set_item(EVP_PKEY_ASN1_METHOD *ameth,
 431                             int (*item_verify) (EVP_MD_CTX *ctx,
 432                                                 const ASN1_ITEM *it,
 433                                                 void *asn,
 434                                                 X509_ALGOR *a,
 435                                                 ASN1_BIT_STRING *sig,
 436                                                 EVP_PKEY *pkey),
 437                             int (*item_sign) (EVP_MD_CTX *ctx,
 438                                               const ASN1_ITEM *it,
 439                                               void *asn,
 440                                               X509_ALGOR *alg1,
 441                                               X509_ALGOR *alg2,
 442                                               ASN1_BIT_STRING *sig))
 443 {
 444     ameth->item_sign = item_sign;
 445     ameth->item_verify = item_verify;
 446 }