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) 1999-2005 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 #ifndef OPENSSL_NO_RSA
  65 #include <openssl/rsa.h>
  66 #endif
  67 #ifndef OPENSSL_NO_DSA
  68 #include <openssl/dsa.h>
  69 #endif
  70 #include <openssl/bn.h>
  71
  72 /* Extract a private key from a PKCS8 structure */
  73
  74 EVP_PKEY *EVP_PKCS82PKEY(PKCS8_PRIV_KEY_INFO *p8)
  75 {
  76         EVP_PKEY *pkey = NULL;
  77         ASN1_OBJECT *algoid;
  78         const EVP_PKEY_ASN1_METHOD *meth;
  79         char obj_tmp[80];
  80
  81         if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8))
  82                 return NULL;
  83
  84         if (!(pkey = EVP_PKEY_new())) {
  85                 EVPerr(EVP_F_EVP_PKCS82PKEY,ERR_R_MALLOC_FAILURE);
  86                 return NULL;
  87         }
  88
  89         meth = EVP_PKEY_ASN1_find(OBJ_obj2nid(algoid));
  90
  91         if (meth)
  92                 {
  93                 if (meth->priv_decode)
  94                         {
  95                         if (!meth->priv_decode(pkey, p8))
  96                                 {
  97                                 EVPerr(EVP_F_EVP_PKCS82PKEY,
  98                                         EVP_R_PRIVATE_KEY_DECODE_ERROR);
  99                                 goto error;
 100                                 }
 101                         }
 102                 else
 103                         {
 104                         EVPerr(EVP_F_EVP_PKCS82PKEY,
 105                                         EVP_R_METHOD_NOT_SUPPORTED);
 106                         goto error;
 107                         }
 108                 }
 109         else
 110                 {
 111                 EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
 112                 i2t_ASN1_OBJECT(obj_tmp, 80, algoid);
 113                 ERR_add_error_data(2, "TYPE=", obj_tmp);
 114                 goto error;
 115                 }
 116         return pkey;
 117
 118         error:
 119         EVP_PKEY_free (pkey);
 120         return NULL;
 121 }
 122
 123 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(EVP_PKEY *pkey)
 124 {
 125         return EVP_PKEY2PKCS8_broken(pkey, PKCS8_OK);
 126 }
 127
 128 /* Turn a private key into a PKCS8 structure */
 129
 130 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8_broken(EVP_PKEY *pkey, int broken)
 131 {
 132         PKCS8_PRIV_KEY_INFO *p8;
 133         const EVP_PKEY_ASN1_METHOD *meth;
 134
 135         if (!(p8 = PKCS8_PRIV_KEY_INFO_new())) {
 136                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,ERR_R_MALLOC_FAILURE);
 137                 return NULL;
 138         }
 139         p8->broken = broken;
 140
 141         meth = EVP_PKEY_ASN1_find(pkey->type);
 142
 143         if (meth)
 144                 {
 145                 if (meth->priv_encode)
 146                         {
 147                         if (!meth->priv_encode(p8, pkey))
 148                                 {
 149                                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
 150                                         EVP_R_PRIVATE_KEY_ENCODE_ERROR);
 151                                 goto error;
 152                                 }
 153                         }
 154                 else
 155                         {
 156                         EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
 157                                         EVP_R_METHOD_NOT_SUPPORTED);
 158                         goto error;
 159                         }
 160                 }
 161         else
 162                 {
 163                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
 164                                 EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
 165                 goto error;
 166                 }
 167         RAND_add(p8->pkey->value.octet_string->data,
 168                  p8->pkey->value.octet_string->length, 0.0);
 169         return p8;
 170         error:
 171         PKCS8_PRIV_KEY_INFO_free(p8);
 172         return NULL;
 173 }
 174
 175 PKCS8_PRIV_KEY_INFO *PKCS8_set_broken(PKCS8_PRIV_KEY_INFO *p8, int broken)
 176 {
 177         switch (broken) {
 178
 179                 case PKCS8_OK:
 180                 p8->broken = PKCS8_OK;
 181                 return p8;
 182                 break;
 183
 184                 case PKCS8_NO_OCTET:
 185                 p8->broken = PKCS8_NO_OCTET;
 186                 p8->pkey->type = V_ASN1_SEQUENCE;
 187                 return p8;
 188                 break;
 189
 190                 default:
 191                 EVPerr(EVP_F_PKCS8_SET_BROKEN,EVP_R_PKCS8_UNKNOWN_BROKEN_TYPE);
 192                 return NULL;
 193         }
 194 }
 195
 196 /* EVP_PKEY attribute functions */
 197
 198 int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
 199 {
 200         return X509at_get_attr_count(key->attributes);
 201 }
 202
 203 int EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid,
 204                           int lastpos)
 205 {
 206         return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
 207 }
 208
 209 int EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, ASN1_OBJECT *obj,
 210                           int lastpos)
 211 {
 212         return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
 213 }
 214
 215 X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
 216 {
 217         return X509at_get_attr(key->attributes, loc);
 218 }
 219
 220 X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
 221 {
 222         return X509at_delete_attr(key->attributes, loc);
 223 }
 224
 225 int EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
 226 {
 227         if(X509at_add1_attr(&key->attributes, attr)) return 1;
 228         return 0;
 229 }
 230
 231 int EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key,
 232                         const ASN1_OBJECT *obj, int type,
 233                         const unsigned char *bytes, int len)
 234 {
 235         if(X509at_add1_attr_by_OBJ(&key->attributes, obj,
 236                                 type, bytes, len)) return 1;
 237         return 0;
 238 }
 239
 240 int EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key,
 241                         int nid, int type,
 242                         const unsigned char *bytes, int len)
 243 {
 244         if(X509at_add1_attr_by_NID(&key->attributes, nid,
 245                                 type, bytes, len)) return 1;
 246         return 0;
 247 }
 248
 249 int EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key,
 250                         const char *attrname, int type,
 251                         const unsigned char *bytes, int len)
 252 {
 253         if(X509at_add1_attr_by_txt(&key->attributes, attrname,
 254                                 type, bytes, len)) return 1;
 255         return 0;
 256 }