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 "objects.h"
  62 #include "evp.h"
  63 #include "asn1_mac.h"
  64 #include "x509.h"
  65
  66 /* EVPerr(EVP_F_D2I_PKEY,EVP_R_UNSUPPORTED_CIPHER); */
  67 /* EVPerr(EVP_F_D2I_PKEY,EVP_R_IV_TOO_LARGE); */
  68
  69 #ifndef NOPROTO
  70 static void EVP_PKEY_free_it(EVP_PKEY *x);
  71 #else
  72 static void EVP_PKEY_free_it();
  73 #endif
  74
  75 int EVP_PKEY_bits(pkey)
  76 EVP_PKEY *pkey;
  77         {
  78 #ifndef NO_RSA
  79         if (pkey->type == EVP_PKEY_RSA)
  80                 return(BN_num_bits(pkey->pkey.rsa->n));
  81         else
  82 #endif
  83 #ifndef NO_DSA
  84                 if (pkey->type == EVP_PKEY_DSA)
  85                 return(BN_num_bits(pkey->pkey.dsa->p));
  86 #endif
  87         return(0);
  88         }
  89
  90 int EVP_PKEY_size(pkey)
  91 EVP_PKEY *pkey;
  92         {
  93         if (pkey == NULL)
  94                 return(0);
  95 #ifndef NO_RSA
  96         if (pkey->type == EVP_PKEY_RSA)
  97                 return(RSA_size(pkey->pkey.rsa));
  98         else
  99 #endif
 100 #ifndef NO_DSA
 101                 if (pkey->type == EVP_PKEY_DSA)
 102                 return(DSA_size(pkey->pkey.dsa));
 103 #endif
 104         return(0);
 105         }
 106
 107 int EVP_PKEY_save_parameters(pkey,mode)
 108 EVP_PKEY *pkey;
 109 int mode;
 110         {
 111 #ifndef NO_DSA
 112         if (pkey->type == EVP_PKEY_DSA)
 113                 {
 114                 int ret=pkey->save_parameters=mode;
 115
 116                 if (mode >= 0)
 117                         pkey->save_parameters=mode;
 118                 return(ret);
 119                 }
 120 #endif
 121         return(0);
 122         }
 123
 124 int EVP_PKEY_copy_parameters(to,from)
 125 EVP_PKEY *to,*from;
 126         {
 127         if (to->type != from->type)
 128                 {
 129                 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_DIFFERENT_KEY_TYPES);
 130                 goto err;
 131                 }
 132
 133         if (EVP_PKEY_missing_parameters(from))
 134                 {
 135                 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_MISSING_PARMATERS);
 136                 goto err;
 137                 }
 138 #ifndef NO_DSA
 139         if (to->type == EVP_PKEY_DSA)
 140                 {
 141                 BIGNUM *a;
 142
 143                 if ((a=BN_dup(from->pkey.dsa->p)) == NULL) goto err;
 144                 if (to->pkey.dsa->p != NULL) BN_free(to->pkey.dsa->p);
 145                 to->pkey.dsa->p=a;
 146
 147                 if ((a=BN_dup(from->pkey.dsa->q)) == NULL) goto err;
 148                 if (to->pkey.dsa->q != NULL) BN_free(to->pkey.dsa->q);
 149                 to->pkey.dsa->q=a;
 150
 151                 if ((a=BN_dup(from->pkey.dsa->g)) == NULL) goto err;
 152                 if (to->pkey.dsa->g != NULL) BN_free(to->pkey.dsa->g);
 153                 to->pkey.dsa->g=a;
 154                 }
 155 #endif
 156         return(1);
 157 err:
 158         return(0);
 159         }
 160
 161 int EVP_PKEY_missing_parameters(pkey)
 162 EVP_PKEY *pkey;
 163         {
 164 #ifndef NO_DSA
 165         if (pkey->type == EVP_PKEY_DSA)
 166                 {
 167                 DSA *dsa;
 168
 169                 dsa=pkey->pkey.dsa;
 170                 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
 171                         return(1);
 172                 }
 173 #endif
 174         return(0);
 175         }
 176
 177 int EVP_PKEY_cmp_parameters(a,b)
 178 EVP_PKEY *a,*b;
 179         {
 180 #ifndef NO_DSA
 181         if ((a->type == EVP_PKEY_DSA) && (b->type == EVP_PKEY_DSA))
 182                 {
 183                 if (    BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
 184                         BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
 185                         BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
 186                         return(0);
 187                 else
 188                         return(1);
 189                 }
 190 #endif
 191         return(-1);
 192         }
 193
 194 EVP_PKEY *EVP_PKEY_new()
 195         {
 196         EVP_PKEY *ret;
 197
 198         ret=(EVP_PKEY *)Malloc(sizeof(EVP_PKEY));
 199         if (ret == NULL)
 200                 {
 201                 EVPerr(EVP_F_EVP_PKEY_NEW,ERR_R_MALLOC_FAILURE);
 202                 return(NULL);
 203                 }
 204         ret->type=EVP_PKEY_NONE;
 205         ret->references=1;
 206         ret->pkey.ptr=NULL;
 207         ret->attributes=NULL;
 208         ret->save_parameters=1;
 209         return(ret);
 210         }
 211
 212 int EVP_PKEY_assign(pkey,type,key)
 213 EVP_PKEY *pkey;
 214 int type;
 215 char *key;
 216         {
 217         if (pkey == NULL) return(0);
 218         if (pkey->pkey.ptr != NULL)
 219                 EVP_PKEY_free_it(pkey);
 220         pkey->type=EVP_PKEY_type(type);
 221         pkey->save_type=type;
 222         pkey->pkey.ptr=key;
 223         return(1);
 224         }
 225
 226 int EVP_PKEY_type(type)
 227 int type;
 228         {
 229         switch (type)
 230                 {
 231         case EVP_PKEY_RSA:
 232         case EVP_PKEY_RSA2:
 233                 return(EVP_PKEY_RSA);
 234         case EVP_PKEY_DSA:
 235         case EVP_PKEY_DSA1:
 236         case EVP_PKEY_DSA2:
 237         case EVP_PKEY_DSA3:
 238         case EVP_PKEY_DSA4:
 239                 return(EVP_PKEY_DSA);
 240         case EVP_PKEY_DH:
 241                 return(EVP_PKEY_DH);
 242         default:
 243                 return(NID_undef);
 244                 }
 245         }
 246
 247 void EVP_PKEY_free(x)
 248 EVP_PKEY *x;
 249         {
 250         int i;
 251
 252         if (x == NULL) return;
 253
 254         i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY);
 255 #ifdef REF_PRINT
 256         REF_PRINT("EVP_PKEY",x);
 257 #endif
 258         if (i > 0) return;
 259 #ifdef REF_CHECK
 260         if (i < 0)
 261                 {
 262                 fprintf(stderr,"EVP_PKEY_free, bad reference count\n");
 263                 abort();
 264                 }
 265 #endif
 266         EVP_PKEY_free_it(x);
 267         Free((char *)x);
 268         }
 269
 270 static void EVP_PKEY_free_it(x)
 271 EVP_PKEY *x;
 272         {
 273         switch (x->type)
 274                 {
 275 #ifndef NO_RSA
 276         case EVP_PKEY_RSA:
 277         case EVP_PKEY_RSA2:
 278                 RSA_free(x->pkey.rsa);
 279                 break;
 280 #endif
 281 #ifndef NO_DSA
 282         case EVP_PKEY_DSA:
 283         case EVP_PKEY_DSA2:
 284         case EVP_PKEY_DSA3:
 285         case EVP_PKEY_DSA4:
 286                 DSA_free(x->pkey.dsa);
 287                 break;
 288 #endif
 289 #ifndef NO_DH
 290         case EVP_PKEY_DH:
 291                 DH_free(x->pkey.dh);
 292                 break;
 293 #endif
 294                 }
 295         }
 296