crypto/evp/evp_pkey.c

   1 /* evp_pkey.c */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project 1999.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999-2005 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 #include "asn1_locl.h"
  65
  66 /* Extract a private key from a PKCS8 structure */
  67
  68 EVP_PKEY *EVP_PKCS82PKEY(PKCS8_PRIV_KEY_INFO *p8)
  69 {
  70         EVP_PKEY *pkey = NULL;
  71         ASN1_OBJECT *algoid;
  72         char obj_tmp[80];
  73
  74         if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8))
  75                 return NULL;
  76
  77         if (!(pkey = EVP_PKEY_new())) {
  78                 EVPerr(EVP_F_EVP_PKCS82PKEY,ERR_R_MALLOC_FAILURE);
  79                 return NULL;
  80         }
  81
  82         if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(algoid)))
  83                 {
  84                 EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
  85                 i2t_ASN1_OBJECT(obj_tmp, 80, algoid);
  86                 ERR_add_error_data(2, "TYPE=", obj_tmp);
  87                 goto error;
  88                 }
  89
  90         if (pkey->ameth->priv_decode)
  91                 {
  92                 if (!pkey->ameth->priv_decode(pkey, p8))
  93                         {
  94                         EVPerr(EVP_F_EVP_PKCS82PKEY,
  95                                         EVP_R_PRIVATE_KEY_DECODE_ERROR);
  96                         goto error;
  97                         }
  98                 }
  99         else
 100                 {
 101                 EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_METHOD_NOT_SUPPORTED);
 102                 goto error;
 103                 }
 104
 105         return pkey;
 106
 107         error:
 108         EVP_PKEY_free (pkey);
 109         return NULL;
 110 }
 111
 112 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(EVP_PKEY *pkey)
 113 {
 114         return EVP_PKEY2PKCS8_broken(pkey, PKCS8_OK);
 115 }
 116
 117 /* Turn a private key into a PKCS8 structure */
 118
 119 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8_broken(EVP_PKEY *pkey, int broken)
 120 {
 121         PKCS8_PRIV_KEY_INFO *p8;
 122
 123         if (!(p8 = PKCS8_PRIV_KEY_INFO_new())) {
 124                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,ERR_R_MALLOC_FAILURE);
 125                 return NULL;
 126         }
 127         p8->broken = broken;
 128
 129         if (pkey->ameth)
 130                 {
 131                 if (pkey->ameth->priv_encode)
 132                         {
 133                         if (!pkey->ameth->priv_encode(p8, pkey))
 134                                 {
 135                                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
 136                                         EVP_R_PRIVATE_KEY_ENCODE_ERROR);
 137                                 goto error;
 138                                 }
 139                         }
 140                 else
 141                         {
 142                         EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
 143                                         EVP_R_METHOD_NOT_SUPPORTED);
 144                         goto error;
 145                         }
 146                 }
 147         else
 148                 {
 149                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
 150                                 EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
 151                 goto error;
 152                 }
 153         RAND_add(p8->pkey->value.octet_string->data,
 154                  p8->pkey->value.octet_string->length, 0.0);
 155         return p8;
 156         error:
 157         PKCS8_PRIV_KEY_INFO_free(p8);
 158         return NULL;
 159 }
 160
 161 PKCS8_PRIV_KEY_INFO *PKCS8_set_broken(PKCS8_PRIV_KEY_INFO *p8, int broken)
 162 {
 163         switch (broken) {
 164
 165                 case PKCS8_OK:
 166                 p8->broken = PKCS8_OK;
 167                 return p8;
 168                 break;
 169
 170                 case PKCS8_NO_OCTET:
 171                 p8->broken = PKCS8_NO_OCTET;
 172                 p8->pkey->type = V_ASN1_SEQUENCE;
 173                 return p8;
 174                 break;
 175
 176                 default:
 177                 EVPerr(EVP_F_PKCS8_SET_BROKEN,EVP_R_PKCS8_UNKNOWN_BROKEN_TYPE);
 178                 return NULL;
 179         }
 180 }
 181
 182 /* EVP_PKEY attribute functions */
 183
 184 int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
 185 {
 186         return X509at_get_attr_count(key->attributes);
 187 }
 188
 189 int EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid,
 190                           int lastpos)
 191 {
 192         return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
 193 }
 194
 195 int EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, ASN1_OBJECT *obj,
 196                           int lastpos)
 197 {
 198         return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
 199 }
 200
 201 X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
 202 {
 203         return X509at_get_attr(key->attributes, loc);
 204 }
 205
 206 X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
 207 {
 208         return X509at_delete_attr(key->attributes, loc);
 209 }
 210
 211 int EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
 212 {
 213         if(X509at_add1_attr(&key->attributes, attr)) return 1;
 214         return 0;
 215 }
 216
 217 int EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key,
 218                         const ASN1_OBJECT *obj, int type,
 219                         const unsigned char *bytes, int len)
 220 {
 221         if(X509at_add1_attr_by_OBJ(&key->attributes, obj,
 222                                 type, bytes, len)) return 1;
 223         return 0;
 224 }
 225
 226 int EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key,
 227                         int nid, int type,
 228                         const unsigned char *bytes, int len)
 229 {
 230         if(X509at_add1_attr_by_NID(&key->attributes, nid,
 231                                 type, bytes, len)) return 1;
 232         return 0;
 233 }
 234
 235 int EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key,
 236                         const char *attrname, int type,
 237                         const unsigned char *bytes, int len)
 238 {
 239         if(X509at_add1_attr_by_txt(&key->attributes, attrname,
 240                                 type, bytes, len)) return 1;
 241         return 0;
 242 }