crypto/openssl-0.9.7e/crypto/evp/evp_pkey.c

   1 /* evp_pkey.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 1999.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999 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 <stdlib.h>
  61 #include "cryptlib.h"
  62 #include <openssl/x509.h>
  63 #include <openssl/rand.h>
  64
  65 #ifndef OPENSSL_NO_DSA
  66 static int dsa_pkey2pkcs8(PKCS8_PRIV_KEY_INFO *p8inf, EVP_PKEY *pkey);
  67 #endif
  68
  69 /* Extract a private key from a PKCS8 structure */
  70
  71 EVP_PKEY *EVP_PKCS82PKEY (PKCS8_PRIV_KEY_INFO *p8)
  72 {
  73         EVP_PKEY *pkey = NULL;
  74 #ifndef OPENSSL_NO_RSA
  75         RSA *rsa = NULL;
  76 #endif
  77 #ifndef OPENSSL_NO_DSA
  78         DSA *dsa = NULL;
  79         ASN1_INTEGER *privkey;
  80         ASN1_TYPE *t1, *t2, *param = NULL;
  81         STACK_OF(ASN1_TYPE) *ndsa = NULL;
  82         BN_CTX *ctx = NULL;
  83         int plen;
  84 #endif
  85         X509_ALGOR *a;
  86         unsigned char *p;
  87         const unsigned char *cp;
  88         int pkeylen;
  89         char obj_tmp[80];
  90
  91         if(p8->pkey->type == V_ASN1_OCTET_STRING) {
  92                 p8->broken = PKCS8_OK;
  93                 p = p8->pkey->value.octet_string->data;
  94                 pkeylen = p8->pkey->value.octet_string->length;
  95         } else {
  96                 p8->broken = PKCS8_NO_OCTET;
  97                 p = p8->pkey->value.sequence->data;
  98                 pkeylen = p8->pkey->value.sequence->length;
  99         }
 100         if (!(pkey = EVP_PKEY_new())) {
 101                 EVPerr(EVP_F_EVP_PKCS82PKEY,ERR_R_MALLOC_FAILURE);
 102                 return NULL;
 103         }
 104         a = p8->pkeyalg;
 105         switch (OBJ_obj2nid(a->algorithm))
 106         {
 107 #ifndef OPENSSL_NO_RSA
 108                 case NID_rsaEncryption:
 109                 cp = p;
 110                 if (!(rsa = d2i_RSAPrivateKey (NULL,&cp, pkeylen))) {
 111                         EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
 112                         return NULL;
 113                 }
 114                 EVP_PKEY_assign_RSA (pkey, rsa);
 115                 break;
 116 #endif
 117 #ifndef OPENSSL_NO_DSA
 118                 case NID_dsa:
 119                 /* PKCS#8 DSA is weird: you just get a private key integer
 120                  * and parameters in the AlgorithmIdentifier the pubkey must
 121                  * be recalculated.
 122                  */
 123
 124                 /* Check for broken DSA PKCS#8, UGH! */
 125                 if(*p == (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED)) {
 126                     if(!(ndsa = ASN1_seq_unpack_ASN1_TYPE(p, pkeylen,
 127                                                           d2i_ASN1_TYPE,
 128                                                           ASN1_TYPE_free))) {
 129                         EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
 130                         goto dsaerr;
 131                     }
 132                     if(sk_ASN1_TYPE_num(ndsa) != 2 ) {
 133                         EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
 134                         goto dsaerr;
 135                     }
 136                     /* Handle Two broken types:
 137                      * SEQUENCE {parameters, priv_key}
 138                      * SEQUENCE {pub_key, priv_key}
 139                      */
 140
 141                     t1 = sk_ASN1_TYPE_value(ndsa, 0);
 142                     t2 = sk_ASN1_TYPE_value(ndsa, 1);
 143                     if(t1->type == V_ASN1_SEQUENCE) {
 144                         p8->broken = PKCS8_EMBEDDED_PARAM;
 145                         param = t1;
 146                     } else if(a->parameter->type == V_ASN1_SEQUENCE) {
 147                         p8->broken = PKCS8_NS_DB;
 148                         param = a->parameter;
 149                     } else {
 150                         EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
 151                         goto dsaerr;
 152                     }
 153
 154                     if(t2->type != V_ASN1_INTEGER) {
 155                         EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
 156                         goto dsaerr;
 157                     }
 158                     privkey = t2->value.integer;
 159                 } else {
 160                         if (!(privkey=d2i_ASN1_INTEGER (NULL, &p, pkeylen))) {
 161                                 EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
 162                                 goto dsaerr;
 163                         }
 164                         param = p8->pkeyalg->parameter;
 165                 }
 166                 if (!param || (param->type != V_ASN1_SEQUENCE)) {
 167                         EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
 168                         goto dsaerr;
 169                 }
 170                 cp = p = param->value.sequence->data;
 171                 plen = param->value.sequence->length;
 172                 if (!(dsa = d2i_DSAparams (NULL, &cp, plen))) {
 173                         EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
 174                         goto dsaerr;
 175                 }
 176                 /* We have parameters now set private key */
 177                 if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) {
 178                         EVPerr(EVP_F_EVP_PKCS82PKEY,EVP_R_BN_DECODE_ERROR);
 179                         goto dsaerr;
 180                 }
 181                 /* Calculate public key (ouch!) */
 182                 if (!(dsa->pub_key = BN_new())) {
 183                         EVPerr(EVP_F_EVP_PKCS82PKEY,ERR_R_MALLOC_FAILURE);
 184                         goto dsaerr;
 185                 }
 186                 if (!(ctx = BN_CTX_new())) {
 187                         EVPerr(EVP_F_EVP_PKCS82PKEY,ERR_R_MALLOC_FAILURE);
 188                         goto dsaerr;
 189                 }
 190
 191                 if (!BN_mod_exp(dsa->pub_key, dsa->g,
 192                                                  dsa->priv_key, dsa->p, ctx)) {
 193
 194                         EVPerr(EVP_F_EVP_PKCS82PKEY,EVP_R_BN_PUBKEY_ERROR);
 195                         goto dsaerr;
 196                 }
 197
 198                 EVP_PKEY_assign_DSA(pkey, dsa);
 199                 BN_CTX_free (ctx);
 200                 if(ndsa) sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 201                 else ASN1_INTEGER_free(privkey);
 202                 break;
 203                 dsaerr:
 204                 BN_CTX_free (ctx);
 205                 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 206                 DSA_free(dsa);
 207                 EVP_PKEY_free(pkey);
 208                 return NULL;
 209                 break;
 210 #endif
 211                 default:
 212                 EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
 213                 if (!a->algorithm) BUF_strlcpy (obj_tmp, "NULL", sizeof obj_tmp);
 214                 else i2t_ASN1_OBJECT(obj_tmp, 80, a->algorithm);
 215                 ERR_add_error_data(2, "TYPE=", obj_tmp);
 216                 EVP_PKEY_free (pkey);
 217                 return NULL;
 218         }
 219         return pkey;
 220 }
 221
 222 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(EVP_PKEY *pkey)
 223 {
 224         return EVP_PKEY2PKCS8_broken(pkey, PKCS8_OK);
 225 }
 226
 227 /* Turn a private key into a PKCS8 structure */
 228
 229 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8_broken(EVP_PKEY *pkey, int broken)
 230 {
 231         PKCS8_PRIV_KEY_INFO *p8;
 232
 233         if (!(p8 = PKCS8_PRIV_KEY_INFO_new())) {
 234                 EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 235                 return NULL;
 236         }
 237         p8->broken = broken;
 238         ASN1_INTEGER_set (p8->version, 0);
 239         if (!(p8->pkeyalg->parameter = ASN1_TYPE_new ())) {
 240                 EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 241                 PKCS8_PRIV_KEY_INFO_free (p8);
 242                 return NULL;
 243         }
 244         p8->pkey->type = V_ASN1_OCTET_STRING;
 245         switch (EVP_PKEY_type(pkey->type)) {
 246 #ifndef OPENSSL_NO_RSA
 247                 case EVP_PKEY_RSA:
 248
 249                 if(p8->broken == PKCS8_NO_OCTET) p8->pkey->type = V_ASN1_SEQUENCE;
 250
 251                 p8->pkeyalg->algorithm = OBJ_nid2obj(NID_rsaEncryption);
 252                 p8->pkeyalg->parameter->type = V_ASN1_NULL;
 253                 if (!ASN1_pack_string ((char *)pkey, i2d_PrivateKey,
 254                                          &p8->pkey->value.octet_string)) {
 255                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 256                         PKCS8_PRIV_KEY_INFO_free (p8);
 257                         return NULL;
 258                 }
 259                 break;
 260 #endif
 261 #ifndef OPENSSL_NO_DSA
 262                 case EVP_PKEY_DSA:
 263                 if(!dsa_pkey2pkcs8(p8, pkey)) {
 264                         PKCS8_PRIV_KEY_INFO_free (p8);
 265                         return NULL;
 266                 }
 267
 268                 break;
 269 #endif
 270                 default:
 271                 EVPerr(EVP_F_EVP_PKEY2PKCS8, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
 272                 PKCS8_PRIV_KEY_INFO_free (p8);
 273                 return NULL;
 274         }
 275         RAND_add(p8->pkey->value.octet_string->data,
 276                  p8->pkey->value.octet_string->length, 0);
 277         return p8;
 278 }
 279
 280 PKCS8_PRIV_KEY_INFO *PKCS8_set_broken(PKCS8_PRIV_KEY_INFO *p8, int broken)
 281 {
 282         switch (broken) {
 283
 284                 case PKCS8_OK:
 285                 p8->broken = PKCS8_OK;
 286                 return p8;
 287                 break;
 288
 289                 case PKCS8_NO_OCTET:
 290                 p8->broken = PKCS8_NO_OCTET;
 291                 p8->pkey->type = V_ASN1_SEQUENCE;
 292                 return p8;
 293                 break;
 294
 295                 default:
 296                 EVPerr(EVP_F_EVP_PKCS8_SET_BROKEN,EVP_R_PKCS8_UNKNOWN_BROKEN_TYPE);
 297                 return NULL;
 298                 break;
 299
 300         }
 301 }
 302
 303 #ifndef OPENSSL_NO_DSA
 304 static int dsa_pkey2pkcs8(PKCS8_PRIV_KEY_INFO *p8, EVP_PKEY *pkey)
 305 {
 306         ASN1_STRING *params;
 307         ASN1_INTEGER *prkey;
 308         ASN1_TYPE *ttmp;
 309         STACK_OF(ASN1_TYPE) *ndsa;
 310         unsigned char *p, *q;
 311         int len;
 312
 313         p8->pkeyalg->algorithm = OBJ_nid2obj(NID_dsa);
 314         len = i2d_DSAparams (pkey->pkey.dsa, NULL);
 315         if (!(p = OPENSSL_malloc(len))) {
 316                 EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 317                 PKCS8_PRIV_KEY_INFO_free (p8);
 318                 return 0;
 319         }
 320         q = p;
 321         i2d_DSAparams (pkey->pkey.dsa, &q);
 322         params = ASN1_STRING_new();
 323         ASN1_STRING_set(params, p, len);
 324         OPENSSL_free(p);
 325         /* Get private key into integer */
 326         if (!(prkey = BN_to_ASN1_INTEGER (pkey->pkey.dsa->priv_key, NULL))) {
 327                 EVPerr(EVP_F_EVP_PKEY2PKCS8,EVP_R_ENCODE_ERROR);
 328                 return 0;
 329         }
 330
 331         switch(p8->broken) {
 332
 333                 case PKCS8_OK:
 334                 case PKCS8_NO_OCTET:
 335
 336                 if (!ASN1_pack_string((char *)prkey, i2d_ASN1_INTEGER,
 337                                          &p8->pkey->value.octet_string)) {
 338                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 339                         M_ASN1_INTEGER_free (prkey);
 340                         return 0;
 341                 }
 342
 343                 M_ASN1_INTEGER_free (prkey);
 344                 p8->pkeyalg->parameter->value.sequence = params;
 345                 p8->pkeyalg->parameter->type = V_ASN1_SEQUENCE;
 346
 347                 break;
 348
 349                 case PKCS8_NS_DB:
 350
 351                 p8->pkeyalg->parameter->value.sequence = params;
 352                 p8->pkeyalg->parameter->type = V_ASN1_SEQUENCE;
 353                 ndsa = sk_ASN1_TYPE_new_null();
 354                 ttmp = ASN1_TYPE_new();
 355                 if (!(ttmp->value.integer = BN_to_ASN1_INTEGER (pkey->pkey.dsa->pub_key, NULL))) {
 356                         EVPerr(EVP_F_EVP_PKEY2PKCS8,EVP_R_ENCODE_ERROR);
 357                         PKCS8_PRIV_KEY_INFO_free(p8);
 358                         return 0;
 359                 }
 360                 ttmp->type = V_ASN1_INTEGER;
 361                 sk_ASN1_TYPE_push(ndsa, ttmp);
 362
 363                 ttmp = ASN1_TYPE_new();
 364                 ttmp->value.integer = prkey;
 365                 ttmp->type = V_ASN1_INTEGER;
 366                 sk_ASN1_TYPE_push(ndsa, ttmp);
 367
 368                 p8->pkey->value.octet_string = ASN1_OCTET_STRING_new();
 369
 370                 if (!ASN1_seq_pack_ASN1_TYPE(ndsa, i2d_ASN1_TYPE,
 371                                          &p8->pkey->value.octet_string->data,
 372                                          &p8->pkey->value.octet_string->length)) {
 373
 374                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 375                         sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 376                         M_ASN1_INTEGER_free(prkey);
 377                         return 0;
 378                 }
 379                 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 380                 break;
 381
 382                 case PKCS8_EMBEDDED_PARAM:
 383
 384                 p8->pkeyalg->parameter->type = V_ASN1_NULL;
 385                 ndsa = sk_ASN1_TYPE_new_null();
 386                 ttmp = ASN1_TYPE_new();
 387                 ttmp->value.sequence = params;
 388                 ttmp->type = V_ASN1_SEQUENCE;
 389                 sk_ASN1_TYPE_push(ndsa, ttmp);
 390
 391                 ttmp = ASN1_TYPE_new();
 392                 ttmp->value.integer = prkey;
 393                 ttmp->type = V_ASN1_INTEGER;
 394                 sk_ASN1_TYPE_push(ndsa, ttmp);
 395
 396                 p8->pkey->value.octet_string = ASN1_OCTET_STRING_new();
 397
 398                 if (!ASN1_seq_pack_ASN1_TYPE(ndsa, i2d_ASN1_TYPE,
 399                                          &p8->pkey->value.octet_string->data,
 400                                          &p8->pkey->value.octet_string->length)) {
 401
 402                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 403                         sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 404                         M_ASN1_INTEGER_free (prkey);
 405                         return 0;
 406                 }
 407                 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 408                 break;
 409         }
 410         return 1;
 411 }
 412 #endif