crypto/evp/p_lib.c

   1 /* crypto/evp/p_lib.c */
   2 /* Copyright (C) 1995-1997 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_size(pkey)
  76 EVP_PKEY *pkey;
  77         {
  78 #ifndef NO_RSA
  79         if (pkey->type == EVP_PKEY_RSA)
  80                 return(RSA_size(pkey->pkey.rsa));
  81         else
  82 #endif
  83 #ifndef NO_DSA
  84                 if (pkey->type == EVP_PKEY_DSA)
  85                 return(DSA_size(pkey->pkey.dsa));
  86 #endif
  87         return(0);
  88         }
  89
  90 int EVP_PKEY_save_parameters(pkey,mode)
  91 EVP_PKEY *pkey;
  92 int mode;
  93         {
  94 #ifndef NO_DSA
  95         if (pkey->type == EVP_PKEY_DSA)
  96                 {
  97                 int ret=pkey->save_parameters=mode;
  98
  99                 if (mode >= 0)
 100                         pkey->save_parameters=mode;
 101                 return(ret);
 102                 }
 103 #endif
 104         return(0);
 105         }
 106
 107 int EVP_PKEY_copy_parameters(to,from)
 108 EVP_PKEY *to,*from;
 109         {
 110         if (to->type != from->type)
 111                 {
 112                 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_DIFFERENT_KEY_TYPES);
 113                 return(0);
 114                 }
 115
 116         if (EVP_PKEY_missing_parameters(from))
 117                 {
 118                 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_MISSING_PARMATERS);
 119                 return(0);
 120                 }
 121 #ifndef NO_DSA
 122         if (to->type == EVP_PKEY_DSA)
 123                 {
 124                 BIGNUM *a;
 125
 126                 if ((a=BN_dup(from->pkey.dsa->p)) == NULL) goto err;
 127                 if (to->pkey.dsa->p != NULL) BN_free(to->pkey.dsa->p);
 128                 to->pkey.dsa->p=a;
 129
 130                 if ((a=BN_dup(from->pkey.dsa->q)) == NULL) goto err;
 131                 if (to->pkey.dsa->q != NULL) BN_free(to->pkey.dsa->q);
 132                 to->pkey.dsa->q=a;
 133
 134                 if ((a=BN_dup(from->pkey.dsa->g)) == NULL) goto err;
 135                 if (to->pkey.dsa->g != NULL) BN_free(to->pkey.dsa->g);
 136                 to->pkey.dsa->g=a;
 137                 }
 138 #endif
 139         return(1);
 140 err:
 141         return(0);
 142         }
 143
 144 int EVP_PKEY_missing_parameters(pkey)
 145 EVP_PKEY *pkey;
 146         {
 147 #ifndef NO_DSA
 148         if (pkey->type == EVP_PKEY_DSA)
 149                 {
 150                 DSA *dsa;
 151
 152                 dsa=pkey->pkey.dsa;
 153                 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
 154                         return(1);
 155                 }
 156 #endif
 157         return(0);
 158         }
 159
 160 EVP_PKEY *EVP_PKEY_new()
 161         {
 162         EVP_PKEY *ret;
 163
 164         ret=(EVP_PKEY *)Malloc(sizeof(EVP_PKEY));
 165         if (ret == NULL)
 166                 {
 167                 EVPerr(EVP_F_EVP_PKEY_NEW,ERR_R_MALLOC_FAILURE);
 168                 return(NULL);
 169                 }
 170         ret->type=EVP_PKEY_NONE;
 171         ret->references=1;
 172         ret->pkey.ptr=NULL;
 173         ret->attributes=NULL;
 174         ret->save_parameters=1;
 175         return(ret);
 176         }
 177
 178 int EVP_PKEY_assign(pkey,type,key)
 179 EVP_PKEY *pkey;
 180 int type;
 181 char *key;
 182         {
 183         if (pkey == NULL) return(0);
 184         if (pkey->pkey.ptr != NULL)
 185                 EVP_PKEY_free_it(pkey);
 186         pkey->type=EVP_PKEY_type(type);
 187         pkey->save_type=type;
 188         pkey->pkey.ptr=key;
 189         return(1);
 190         }
 191
 192 int EVP_PKEY_type(type)
 193 int type;
 194         {
 195         switch (type)
 196                 {
 197         case EVP_PKEY_RSA:
 198         case EVP_PKEY_RSA2:
 199                 return(EVP_PKEY_RSA);
 200         case EVP_PKEY_DSA:
 201         case EVP_PKEY_DSA2:
 202         case EVP_PKEY_DSA3:
 203                 return(EVP_PKEY_DSA);
 204         case EVP_PKEY_DH:
 205                 return(EVP_PKEY_DH);
 206         default:
 207                 return(NID_undef);
 208                 }
 209         }
 210
 211 void EVP_PKEY_free(x)
 212 EVP_PKEY *x;
 213         {
 214         int i;
 215
 216         if (x == NULL) return;
 217
 218         i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY);
 219         if (i > 0) return;
 220 #ifdef REF_CHECK
 221         if (i < 0)
 222                 {
 223                 fprintf(stderr,"EVP_PKEY_free, bad reference count\n");
 224                 abort();
 225                 }
 226 #endif
 227         EVP_PKEY_free_it(x);
 228         Free((char *)x);
 229         }
 230
 231 static void EVP_PKEY_free_it(x)
 232 EVP_PKEY *x;
 233         {
 234         switch (x->type)
 235                 {
 236 #ifndef NO_RSA
 237         case EVP_PKEY_RSA:
 238         case EVP_PKEY_RSA2:
 239                 RSA_free(x->pkey.rsa);
 240                 break;
 241 #endif
 242 #ifndef NO_DSA
 243         case EVP_PKEY_DSA:
 244         case EVP_PKEY_DSA2:
 245         case EVP_PKEY_DSA3:
 246                 DSA_free(x->pkey.dsa);
 247                 break;
 248 #endif
 249 #ifndef NO_DH
 250         case EVP_PKEY_DH:
 251                 DH_free(x->pkey.dh);
 252                 break;
 253 #endif
 254                 }
 255         }
 256