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      1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com)
      2  * All rights reserved.
      3  *
      4  * This package is an SSL implementation written
      5  * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 #include <openssl/evp.h>
     58 
     59 #include <assert.h>
     60 #include <string.h>
     61 
     62 #include <openssl/dsa.h>
     63 #include <openssl/ec.h>
     64 #include <openssl/err.h>
     65 #include <openssl/mem.h>
     66 #include <openssl/nid.h>
     67 #include <openssl/rsa.h>
     68 #include <openssl/thread.h>
     69 
     70 #include "internal.h"
     71 #include "../internal.h"
     72 
     73 
     74 EVP_PKEY *EVP_PKEY_new(void) {
     75   EVP_PKEY *ret;
     76 
     77   ret = OPENSSL_malloc(sizeof(EVP_PKEY));
     78   if (ret == NULL) {
     79     OPENSSL_PUT_ERROR(EVP, ERR_R_MALLOC_FAILURE);
     80     return NULL;
     81   }
     82 
     83   OPENSSL_memset(ret, 0, sizeof(EVP_PKEY));
     84   ret->type = EVP_PKEY_NONE;
     85   ret->references = 1;
     86 
     87   return ret;
     88 }
     89 
     90 static void free_it(EVP_PKEY *pkey) {
     91   if (pkey->ameth && pkey->ameth->pkey_free) {
     92     pkey->ameth->pkey_free(pkey);
     93     pkey->pkey.ptr = NULL;
     94     pkey->type = EVP_PKEY_NONE;
     95   }
     96 }
     97 
     98 void EVP_PKEY_free(EVP_PKEY *pkey) {
     99   if (pkey == NULL) {
    100     return;
    101   }
    102 
    103   if (!CRYPTO_refcount_dec_and_test_zero(&pkey->references)) {
    104     return;
    105   }
    106 
    107   free_it(pkey);
    108   OPENSSL_free(pkey);
    109 }
    110 
    111 int EVP_PKEY_up_ref(EVP_PKEY *pkey) {
    112   CRYPTO_refcount_inc(&pkey->references);
    113   return 1;
    114 }
    115 
    116 int EVP_PKEY_is_opaque(const EVP_PKEY *pkey) {
    117   if (pkey->ameth && pkey->ameth->pkey_opaque) {
    118     return pkey->ameth->pkey_opaque(pkey);
    119   }
    120   return 0;
    121 }
    122 
    123 int EVP_PKEY_supports_digest(const EVP_PKEY *pkey, const EVP_MD *md) {
    124   if (pkey->ameth && pkey->ameth->pkey_supports_digest) {
    125     return pkey->ameth->pkey_supports_digest(pkey, md);
    126   }
    127   return 1;
    128 }
    129 
    130 int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b) {
    131   if (a->type != b->type) {
    132     return -1;
    133   }
    134 
    135   if (a->ameth) {
    136     int ret;
    137     /* Compare parameters if the algorithm has them */
    138     if (a->ameth->param_cmp) {
    139       ret = a->ameth->param_cmp(a, b);
    140       if (ret <= 0) {
    141         return ret;
    142       }
    143     }
    144 
    145     if (a->ameth->pub_cmp) {
    146       return a->ameth->pub_cmp(a, b);
    147     }
    148   }
    149 
    150   return -2;
    151 }
    152 
    153 int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) {
    154   if (to->type != from->type) {
    155     OPENSSL_PUT_ERROR(EVP, EVP_R_DIFFERENT_KEY_TYPES);
    156     goto err;
    157   }
    158 
    159   if (EVP_PKEY_missing_parameters(from)) {
    160     OPENSSL_PUT_ERROR(EVP, EVP_R_MISSING_PARAMETERS);
    161     goto err;
    162   }
    163 
    164   if (from->ameth && from->ameth->param_copy) {
    165     return from->ameth->param_copy(to, from);
    166   }
    167 
    168 err:
    169   return 0;
    170 }
    171 
    172 int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey) {
    173   if (pkey->ameth && pkey->ameth->param_missing) {
    174     return pkey->ameth->param_missing(pkey);
    175   }
    176   return 0;
    177 }
    178 
    179 int EVP_PKEY_size(const EVP_PKEY *pkey) {
    180   if (pkey && pkey->ameth && pkey->ameth->pkey_size) {
    181     return pkey->ameth->pkey_size(pkey);
    182   }
    183   return 0;
    184 }
    185 
    186 int EVP_PKEY_bits(EVP_PKEY *pkey) {
    187   if (pkey && pkey->ameth && pkey->ameth->pkey_bits) {
    188     return pkey->ameth->pkey_bits(pkey);
    189   }
    190   return 0;
    191 }
    192 
    193 int EVP_PKEY_id(const EVP_PKEY *pkey) {
    194   return pkey->type;
    195 }
    196 
    197 /* evp_pkey_asn1_find returns the ASN.1 method table for the given |nid|, which
    198  * should be one of the |EVP_PKEY_*| values. It returns NULL if |nid| is
    199  * unknown. */
    200 static const EVP_PKEY_ASN1_METHOD *evp_pkey_asn1_find(int nid) {
    201   switch (nid) {
    202     case EVP_PKEY_RSA:
    203       return &rsa_asn1_meth;
    204     case EVP_PKEY_EC:
    205       return &ec_asn1_meth;
    206     case EVP_PKEY_DSA:
    207       return &dsa_asn1_meth;
    208     default:
    209       return NULL;
    210   }
    211 }
    212 
    213 int EVP_PKEY_type(int nid) {
    214   const EVP_PKEY_ASN1_METHOD *meth = evp_pkey_asn1_find(nid);
    215   if (meth == NULL) {
    216     return NID_undef;
    217   }
    218   return meth->pkey_id;
    219 }
    220 
    221 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key) {
    222   if (EVP_PKEY_assign_RSA(pkey, key)) {
    223     RSA_up_ref(key);
    224     return 1;
    225   }
    226   return 0;
    227 }
    228 
    229 int EVP_PKEY_assign_RSA(EVP_PKEY *pkey, RSA *key) {
    230   return EVP_PKEY_assign(pkey, EVP_PKEY_RSA, key);
    231 }
    232 
    233 RSA *EVP_PKEY_get0_RSA(EVP_PKEY *pkey) {
    234   if (pkey->type != EVP_PKEY_RSA) {
    235     OPENSSL_PUT_ERROR(EVP, EVP_R_EXPECTING_AN_RSA_KEY);
    236     return NULL;
    237   }
    238   return pkey->pkey.rsa;
    239 }
    240 
    241 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey) {
    242   RSA *rsa = EVP_PKEY_get0_RSA(pkey);
    243   if (rsa != NULL) {
    244     RSA_up_ref(rsa);
    245   }
    246   return rsa;
    247 }
    248 
    249 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key) {
    250   if (EVP_PKEY_assign_DSA(pkey, key)) {
    251     DSA_up_ref(key);
    252     return 1;
    253   }
    254   return 0;
    255 }
    256 
    257 int EVP_PKEY_assign_DSA(EVP_PKEY *pkey, DSA *key) {
    258   return EVP_PKEY_assign(pkey, EVP_PKEY_DSA, key);
    259 }
    260 
    261 DSA *EVP_PKEY_get0_DSA(EVP_PKEY *pkey) {
    262   if (pkey->type != EVP_PKEY_DSA) {
    263     OPENSSL_PUT_ERROR(EVP, EVP_R_EXPECTING_A_DSA_KEY);
    264     return NULL;
    265   }
    266   return pkey->pkey.dsa;
    267 }
    268 
    269 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey) {
    270   DSA *dsa = EVP_PKEY_get0_DSA(pkey);
    271   if (dsa != NULL) {
    272     DSA_up_ref(dsa);
    273   }
    274   return dsa;
    275 }
    276 
    277 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key) {
    278   if (EVP_PKEY_assign_EC_KEY(pkey, key)) {
    279     EC_KEY_up_ref(key);
    280     return 1;
    281   }
    282   return 0;
    283 }
    284 
    285 int EVP_PKEY_assign_EC_KEY(EVP_PKEY *pkey, EC_KEY *key) {
    286   return EVP_PKEY_assign(pkey, EVP_PKEY_EC, key);
    287 }
    288 
    289 EC_KEY *EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey) {
    290   if (pkey->type != EVP_PKEY_EC) {
    291     OPENSSL_PUT_ERROR(EVP, EVP_R_EXPECTING_AN_EC_KEY_KEY);
    292     return NULL;
    293   }
    294   return pkey->pkey.ec;
    295 }
    296 
    297 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey) {
    298   EC_KEY *ec_key = EVP_PKEY_get0_EC_KEY(pkey);
    299   if (ec_key != NULL) {
    300     EC_KEY_up_ref(ec_key);
    301   }
    302   return ec_key;
    303 }
    304 
    305 DH *EVP_PKEY_get0_DH(EVP_PKEY *pkey) { return NULL; }
    306 
    307 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key) {
    308   if (!EVP_PKEY_set_type(pkey, type)) {
    309     return 0;
    310   }
    311   pkey->pkey.ptr = key;
    312   return key != NULL;
    313 }
    314 
    315 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type) {
    316   const EVP_PKEY_ASN1_METHOD *ameth;
    317 
    318   if (pkey && pkey->pkey.ptr) {
    319     free_it(pkey);
    320   }
    321 
    322   ameth = evp_pkey_asn1_find(type);
    323   if (ameth == NULL) {
    324     OPENSSL_PUT_ERROR(EVP, EVP_R_UNSUPPORTED_ALGORITHM);
    325     ERR_add_error_dataf("algorithm %d", type);
    326     return 0;
    327   }
    328 
    329   if (pkey) {
    330     pkey->ameth = ameth;
    331     pkey->type = pkey->ameth->pkey_id;
    332   }
    333 
    334   return 1;
    335 }
    336 
    337 
    338 
    339 int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) {
    340   if (a->type != b->type) {
    341     return -1;
    342   }
    343   if (a->ameth && a->ameth->param_cmp) {
    344     return a->ameth->param_cmp(a, b);
    345   }
    346   return -2;
    347 }
    348 
    349 int EVP_PKEY_CTX_set_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD *md) {
    350   return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD, 0,
    351                            (void *)md);
    352 }
    353 
    354 int EVP_PKEY_CTX_get_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD **out_md) {
    355   return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_GET_MD,
    356                            0, (void *)out_md);
    357 }
    358 
    359 void OpenSSL_add_all_algorithms(void) {}
    360 
    361 void OPENSSL_add_all_algorithms_conf(void) {}
    362 
    363 void OpenSSL_add_all_ciphers(void) {}
    364 
    365 void OpenSSL_add_all_digests(void) {}
    366 
    367 void EVP_cleanup(void) {}
    368