crypto/evp/p_lib.c

   1 /* crypto/evp/p_lib.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/objects.h>
  62 #include <openssl/evp.h>
  63 #include <openssl/asn1_mac.h>
  64 #include <openssl/x509.h>
  65
  66 static void EVP_PKEY_free_it(EVP_PKEY *x);
  67
  68 int EVP_PKEY_bits(EVP_PKEY *pkey)
  69         {
  70 #ifndef OPENSSL_NO_RSA
  71         if (pkey->type == EVP_PKEY_RSA)
  72                 return(BN_num_bits(pkey->pkey.rsa->n));
  73         else
  74 #endif
  75 #ifndef OPENSSL_NO_DSA
  76                 if (pkey->type == EVP_PKEY_DSA)
  77                 return(BN_num_bits(pkey->pkey.dsa->p));
  78 #endif
  79         return(0);
  80         }
  81
  82 int EVP_PKEY_size(EVP_PKEY *pkey)
  83         {
  84         if (pkey == NULL)
  85                 return(0);
  86 #ifndef OPENSSL_NO_RSA
  87         if (pkey->type == EVP_PKEY_RSA)
  88                 return(RSA_size(pkey->pkey.rsa));
  89         else
  90 #endif
  91 #ifndef OPENSSL_NO_DSA
  92                 if (pkey->type == EVP_PKEY_DSA)
  93                 return(DSA_size(pkey->pkey.dsa));
  94 #endif
  95         return(0);
  96         }
  97
  98 int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
  99         {
 100 #ifndef OPENSSL_NO_DSA
 101         if (pkey->type == EVP_PKEY_DSA)
 102                 {
 103                 int ret=pkey->save_parameters;
 104
 105                 if (mode >= 0)
 106                         pkey->save_parameters=mode;
 107                 return(ret);
 108                 }
 109 #endif
 110         return(0);
 111         }
 112
 113 int EVP_PKEY_copy_parameters(EVP_PKEY *to, EVP_PKEY *from)
 114         {
 115         if (to->type != from->type)
 116                 {
 117                 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_DIFFERENT_KEY_TYPES);
 118                 goto err;
 119                 }
 120
 121         if (EVP_PKEY_missing_parameters(from))
 122                 {
 123                 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_MISSING_PARAMETERS);
 124                 goto err;
 125                 }
 126 #ifndef OPENSSL_NO_DSA
 127         if (to->type == EVP_PKEY_DSA)
 128                 {
 129                 BIGNUM *a;
 130
 131                 if ((a=BN_dup(from->pkey.dsa->p)) == NULL) goto err;
 132                 if (to->pkey.dsa->p != NULL) BN_free(to->pkey.dsa->p);
 133                 to->pkey.dsa->p=a;
 134
 135                 if ((a=BN_dup(from->pkey.dsa->q)) == NULL) goto err;
 136                 if (to->pkey.dsa->q != NULL) BN_free(to->pkey.dsa->q);
 137                 to->pkey.dsa->q=a;
 138
 139                 if ((a=BN_dup(from->pkey.dsa->g)) == NULL) goto err;
 140                 if (to->pkey.dsa->g != NULL) BN_free(to->pkey.dsa->g);
 141                 to->pkey.dsa->g=a;
 142                 }
 143 #endif
 144         return(1);
 145 err:
 146         return(0);
 147         }
 148
 149 int EVP_PKEY_missing_parameters(EVP_PKEY *pkey)
 150         {
 151 #ifndef OPENSSL_NO_DSA
 152         if (pkey->type == EVP_PKEY_DSA)
 153                 {
 154                 DSA *dsa;
 155
 156                 dsa=pkey->pkey.dsa;
 157                 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
 158                         return(1);
 159                 }
 160 #endif
 161         return(0);
 162         }
 163
 164 int EVP_PKEY_cmp_parameters(EVP_PKEY *a, EVP_PKEY *b)
 165         {
 166 #ifndef OPENSSL_NO_DSA
 167         if ((a->type == EVP_PKEY_DSA) && (b->type == EVP_PKEY_DSA))
 168                 {
 169                 if (    BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
 170                         BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
 171                         BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
 172                         return(0);
 173                 else
 174                         return(1);
 175                 }
 176 #endif
 177         return(-1);
 178         }
 179
 180 EVP_PKEY *EVP_PKEY_new(void)
 181         {
 182         EVP_PKEY *ret;
 183
 184         ret=(EVP_PKEY *)OPENSSL_malloc(sizeof(EVP_PKEY));
 185         if (ret == NULL)
 186                 {
 187                 EVPerr(EVP_F_EVP_PKEY_NEW,ERR_R_MALLOC_FAILURE);
 188                 return(NULL);
 189                 }
 190         ret->type=EVP_PKEY_NONE;
 191         ret->references=1;
 192         ret->pkey.ptr=NULL;
 193         ret->attributes=NULL;
 194         ret->save_parameters=1;
 195         return(ret);
 196         }
 197
 198 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, char *key)
 199         {
 200         if (pkey == NULL) return(0);
 201         if (pkey->pkey.ptr != NULL)
 202                 EVP_PKEY_free_it(pkey);
 203         pkey->type=EVP_PKEY_type(type);
 204         pkey->save_type=type;
 205         pkey->pkey.ptr=key;
 206         return(key != NULL);
 207         }
 208
 209 #ifndef OPENSSL_NO_RSA
 210 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
 211 {
 212         int ret = EVP_PKEY_assign_RSA(pkey, key);
 213         if(ret)
 214                 RSA_up(key);
 215         return ret;
 216 }
 217
 218 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
 219         {
 220         if(pkey->type != EVP_PKEY_RSA) {
 221                 EVPerr(EVP_F_EVP_PKEY_GET1_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
 222                 return NULL;
 223         }
 224         RSA_up(pkey->pkey.rsa);
 225         return pkey->pkey.rsa;
 226 }
 227 #endif
 228
 229 #ifndef OPENSSL_NO_DSA
 230 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
 231 {
 232         int ret = EVP_PKEY_assign_DSA(pkey, key);
 233         if(ret)
 234                 DSA_up(key);
 235         return ret;
 236 }
 237
 238 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
 239         {
 240         if(pkey->type != EVP_PKEY_DSA) {
 241                 EVPerr(EVP_F_EVP_PKEY_GET1_DSA, EVP_R_EXPECTING_A_DSA_KEY);
 242                 return NULL;
 243         }
 244         DSA_up(pkey->pkey.dsa);
 245         return pkey->pkey.dsa;
 246 }
 247 #endif
 248
 249 #ifndef OPENSSL_NO_DH
 250
 251 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
 252 {
 253         int ret = EVP_PKEY_assign_DH(pkey, key);
 254         if(ret)
 255                 DH_up(key);
 256         return ret;
 257 }
 258
 259 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
 260         {
 261         if(pkey->type != EVP_PKEY_DH) {
 262                 EVPerr(EVP_F_EVP_PKEY_GET1_DH, EVP_R_EXPECTING_A_DH_KEY);
 263                 return NULL;
 264         }
 265         DH_up(pkey->pkey.dh);
 266         return pkey->pkey.dh;
 267 }
 268 #endif
 269
 270 int EVP_PKEY_type(int type)
 271         {
 272         switch (type)
 273                 {
 274         case EVP_PKEY_RSA:
 275         case EVP_PKEY_RSA2:
 276                 return(EVP_PKEY_RSA);
 277         case EVP_PKEY_DSA:
 278         case EVP_PKEY_DSA1:
 279         case EVP_PKEY_DSA2:
 280         case EVP_PKEY_DSA3:
 281         case EVP_PKEY_DSA4:
 282                 return(EVP_PKEY_DSA);
 283         case EVP_PKEY_DH:
 284                 return(EVP_PKEY_DH);
 285         default:
 286                 return(NID_undef);
 287                 }
 288         }
 289
 290 void EVP_PKEY_free(EVP_PKEY *x)
 291         {
 292         int i;
 293
 294         if (x == NULL) return;
 295
 296         i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY);
 297 #ifdef REF_PRINT
 298         REF_PRINT("EVP_PKEY",x);
 299 #endif
 300         if (i > 0) return;
 301 #ifdef REF_CHECK
 302         if (i < 0)
 303                 {
 304                 fprintf(stderr,"EVP_PKEY_free, bad reference count\n");
 305                 abort();
 306                 }
 307 #endif
 308         EVP_PKEY_free_it(x);
 309         OPENSSL_free(x);
 310         }
 311
 312 static void EVP_PKEY_free_it(EVP_PKEY *x)
 313         {
 314         switch (x->type)
 315                 {
 316 #ifndef OPENSSL_NO_RSA
 317         case EVP_PKEY_RSA:
 318         case EVP_PKEY_RSA2:
 319                 RSA_free(x->pkey.rsa);
 320                 break;
 321 #endif
 322 #ifndef OPENSSL_NO_DSA
 323         case EVP_PKEY_DSA:
 324         case EVP_PKEY_DSA2:
 325         case EVP_PKEY_DSA3:
 326         case EVP_PKEY_DSA4:
 327                 DSA_free(x->pkey.dsa);
 328                 break;
 329 #endif
 330 #ifndef OPENSSL_NO_DH
 331         case EVP_PKEY_DH:
 332                 DH_free(x->pkey.dh);
 333                 break;
 334 #endif
 335                 }
 336         }
 337