userapps/opensource/openssl/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         if (!ASN1_INTEGER_set(p8->version, 0)) {
 239                 EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 240                 PKCS8_PRIV_KEY_INFO_free (p8);
 241                 return NULL;
 242         }
 243         if (!(p8->pkeyalg->parameter = ASN1_TYPE_new ())) {
 244                 EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 245                 PKCS8_PRIV_KEY_INFO_free (p8);
 246                 return NULL;
 247         }
 248         p8->pkey->type = V_ASN1_OCTET_STRING;
 249         switch (EVP_PKEY_type(pkey->type)) {
 250 #ifndef OPENSSL_NO_RSA
 251                 case EVP_PKEY_RSA:
 252
 253                 if(p8->broken == PKCS8_NO_OCTET) p8->pkey->type = V_ASN1_SEQUENCE;
 254
 255                 p8->pkeyalg->algorithm = OBJ_nid2obj(NID_rsaEncryption);
 256                 p8->pkeyalg->parameter->type = V_ASN1_NULL;
 257                 if (!ASN1_pack_string ((char *)pkey, i2d_PrivateKey,
 258                                          &p8->pkey->value.octet_string)) {
 259                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 260                         PKCS8_PRIV_KEY_INFO_free (p8);
 261                         return NULL;
 262                 }
 263                 break;
 264 #endif
 265 #ifndef OPENSSL_NO_DSA
 266                 case EVP_PKEY_DSA:
 267                 if(!dsa_pkey2pkcs8(p8, pkey)) {
 268                         PKCS8_PRIV_KEY_INFO_free (p8);
 269                         return NULL;
 270                 }
 271
 272                 break;
 273 #endif
 274                 default:
 275                 EVPerr(EVP_F_EVP_PKEY2PKCS8, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
 276                 PKCS8_PRIV_KEY_INFO_free (p8);
 277                 return NULL;
 278         }
 279         RAND_add(p8->pkey->value.octet_string->data,
 280                  p8->pkey->value.octet_string->length, 0);
 281         return p8;
 282 }
 283
 284 PKCS8_PRIV_KEY_INFO *PKCS8_set_broken(PKCS8_PRIV_KEY_INFO *p8, int broken)
 285 {
 286         switch (broken) {
 287
 288                 case PKCS8_OK:
 289                 p8->broken = PKCS8_OK;
 290                 return p8;
 291                 break;
 292
 293                 case PKCS8_NO_OCTET:
 294                 p8->broken = PKCS8_NO_OCTET;
 295                 p8->pkey->type = V_ASN1_SEQUENCE;
 296                 return p8;
 297                 break;
 298
 299                 default:
 300                 EVPerr(EVP_F_EVP_PKCS8_SET_BROKEN,EVP_R_PKCS8_UNKNOWN_BROKEN_TYPE);
 301                 return NULL;
 302                 break;
 303
 304         }
 305 }
 306
 307 #ifndef OPENSSL_NO_DSA
 308 static int dsa_pkey2pkcs8(PKCS8_PRIV_KEY_INFO *p8, EVP_PKEY *pkey)
 309 {
 310         ASN1_STRING *params = NULL;
 311         ASN1_INTEGER *prkey = NULL;
 312         ASN1_TYPE *ttmp = NULL;
 313         STACK_OF(ASN1_TYPE) *ndsa = NULL;
 314         unsigned char *p = NULL, *q;
 315         int len;
 316
 317         p8->pkeyalg->algorithm = OBJ_nid2obj(NID_dsa);
 318         len = i2d_DSAparams (pkey->pkey.dsa, NULL);
 319         if (!(p = OPENSSL_malloc(len))) {
 320                 EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 321                 goto err;
 322         }
 323         q = p;
 324         i2d_DSAparams (pkey->pkey.dsa, &q);
 325         if (!(params = ASN1_STRING_new())) {
 326                 EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 327                 goto err;
 328         }
 329         if (!ASN1_STRING_set(params, p, len)) {
 330                 EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 331                 goto err;
 332         }
 333         OPENSSL_free(p);
 334         p = NULL;
 335         /* Get private key into integer */
 336         if (!(prkey = BN_to_ASN1_INTEGER (pkey->pkey.dsa->priv_key, NULL))) {
 337                 EVPerr(EVP_F_EVP_PKEY2PKCS8,EVP_R_ENCODE_ERROR);
 338                 goto err;
 339         }
 340
 341         switch(p8->broken) {
 342
 343                 case PKCS8_OK:
 344                 case PKCS8_NO_OCTET:
 345
 346                 if (!ASN1_pack_string((char *)prkey, i2d_ASN1_INTEGER,
 347                                          &p8->pkey->value.octet_string)) {
 348                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 349                         goto err;
 350                 }
 351
 352                 M_ASN1_INTEGER_free (prkey);
 353                 prkey = NULL;
 354                 p8->pkeyalg->parameter->value.sequence = params;
 355                 params = NULL;
 356                 p8->pkeyalg->parameter->type = V_ASN1_SEQUENCE;
 357
 358                 break;
 359
 360                 case PKCS8_NS_DB:
 361
 362                 p8->pkeyalg->parameter->value.sequence = params;
 363                 params = NULL;
 364                 p8->pkeyalg->parameter->type = V_ASN1_SEQUENCE;
 365                 if (!(ndsa = sk_ASN1_TYPE_new_null())) {
 366                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 367                         goto err;
 368                 }
 369                 if (!(ttmp = ASN1_TYPE_new())) {
 370                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 371                         goto err;
 372                 }
 373                 if (!(ttmp->value.integer =
 374                         BN_to_ASN1_INTEGER(pkey->pkey.dsa->pub_key, NULL))) {
 375                         EVPerr(EVP_F_EVP_PKEY2PKCS8,EVP_R_ENCODE_ERROR);
 376                         goto err;
 377                 }
 378                 ttmp->type = V_ASN1_INTEGER;
 379                 if (!sk_ASN1_TYPE_push(ndsa, ttmp)) {
 380                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 381                         goto err;
 382                 }
 383
 384                 if (!(ttmp = ASN1_TYPE_new())) {
 385                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 386                         goto err;
 387                 }
 388                 ttmp->value.integer = prkey;
 389                 prkey = NULL;
 390                 ttmp->type = V_ASN1_INTEGER;
 391                 if (!sk_ASN1_TYPE_push(ndsa, ttmp)) {
 392                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 393                         goto err;
 394                 }
 395                 ttmp = NULL;
 396
 397                 if (!(p8->pkey->value.octet_string = ASN1_OCTET_STRING_new())) {
 398                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 399                         goto err;
 400                 }
 401
 402                 if (!ASN1_seq_pack_ASN1_TYPE(ndsa, i2d_ASN1_TYPE,
 403                                          &p8->pkey->value.octet_string->data,
 404                                          &p8->pkey->value.octet_string->length)) {
 405
 406                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 407                         goto err;
 408                 }
 409                 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 410                 break;
 411
 412                 case PKCS8_EMBEDDED_PARAM:
 413
 414                 p8->pkeyalg->parameter->type = V_ASN1_NULL;
 415                 if (!(ndsa = sk_ASN1_TYPE_new_null())) {
 416                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 417                         goto err;
 418                 }
 419                 if (!(ttmp = ASN1_TYPE_new())) {
 420                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 421                         goto err;
 422                 }
 423                 ttmp->value.sequence = params;
 424                 params = NULL;
 425                 ttmp->type = V_ASN1_SEQUENCE;
 426                 if (!sk_ASN1_TYPE_push(ndsa, ttmp)) {
 427                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 428                         goto err;
 429                 }
 430
 431                 if (!(ttmp = ASN1_TYPE_new())) {
 432                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 433                         goto err;
 434                 }
 435                 ttmp->value.integer = prkey;
 436                 prkey = NULL;
 437                 ttmp->type = V_ASN1_INTEGER;
 438                 if (!sk_ASN1_TYPE_push(ndsa, ttmp)) {
 439                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 440                         goto err;
 441                 }
 442                 ttmp = NULL;
 443
 444                 if (!(p8->pkey->value.octet_string = ASN1_OCTET_STRING_new())) {
 445                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 446                         goto err;
 447                 }
 448
 449                 if (!ASN1_seq_pack_ASN1_TYPE(ndsa, i2d_ASN1_TYPE,
 450                                          &p8->pkey->value.octet_string->data,
 451                                          &p8->pkey->value.octet_string->length)) {
 452
 453                         EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
 454                         goto err;
 455                 }
 456                 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 457                 break;
 458         }
 459         return 1;
 460 err:
 461         if (p != NULL) OPENSSL_free(p);
 462         if (params != NULL) ASN1_STRING_free(params);
 463         if (prkey != NULL) M_ASN1_INTEGER_free(prkey);
 464         if (ttmp != NULL) ASN1_TYPE_free(ttmp);
 465         if (ndsa != NULL) sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
 466         return 0;
 467 }
 468 #endif