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 #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         const EVP_PKEY_ASN1_METHOD *meth;
  73         char obj_tmp[80];
  74
  75         if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8))
  76                 return NULL;
  77
  78         if (!(pkey = EVP_PKEY_new())) {
  79                 EVPerr(EVP_F_EVP_PKCS82PKEY,ERR_R_MALLOC_FAILURE);
  80                 return NULL;
  81         }
  82
  83         meth = EVP_PKEY_asn1_find(OBJ_obj2nid(algoid));
  84
  85         if (meth)
  86                 {
  87                 if (meth->priv_decode)
  88                         {
  89                         if (!meth->priv_decode(pkey, p8))
  90                                 {
  91                                 EVPerr(EVP_F_EVP_PKCS82PKEY,
  92                                         EVP_R_PRIVATE_KEY_DECODE_ERROR);
  93                                 goto error;
  94                                 }
  95                         }
  96                 else
  97                         {
  98                         EVPerr(EVP_F_EVP_PKCS82PKEY,
  99                                         EVP_R_METHOD_NOT_SUPPORTED);
 100                         goto error;
 101                         }
 102                 }
 103         else
 104                 {
 105                 EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
 106                 i2t_ASN1_OBJECT(obj_tmp, 80, algoid);
 107                 ERR_add_error_data(2, "TYPE=", obj_tmp);
 108                 goto error;
 109                 }
 110         return pkey;
 111
 112         error:
 113         EVP_PKEY_free (pkey);
 114         return NULL;
 115 }
 116
 117 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(EVP_PKEY *pkey)
 118 {
 119         return EVP_PKEY2PKCS8_broken(pkey, PKCS8_OK);
 120 }
 121
 122 /* Turn a private key into a PKCS8 structure */
 123
 124 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8_broken(EVP_PKEY *pkey, int broken)
 125 {
 126         PKCS8_PRIV_KEY_INFO *p8;
 127         const EVP_PKEY_ASN1_METHOD *meth;
 128
 129         if (!(p8 = PKCS8_PRIV_KEY_INFO_new())) {
 130                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,ERR_R_MALLOC_FAILURE);
 131                 return NULL;
 132         }
 133         p8->broken = broken;
 134
 135         meth = EVP_PKEY_asn1_find(pkey->type);
 136
 137         if (meth)
 138                 {
 139                 if (meth->priv_encode)
 140                         {
 141                         if (!meth->priv_encode(p8, pkey))
 142                                 {
 143                                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
 144                                         EVP_R_PRIVATE_KEY_ENCODE_ERROR);
 145                                 goto error;
 146                                 }
 147                         }
 148                 else
 149                         {
 150                         EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
 151                                         EVP_R_METHOD_NOT_SUPPORTED);
 152                         goto error;
 153                         }
 154                 }
 155         else
 156                 {
 157                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
 158                                 EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
 159                 goto error;
 160                 }
 161         RAND_add(p8->pkey->value.octet_string->data,
 162                  p8->pkey->value.octet_string->length, 0.0);
 163         return p8;
 164         error:
 165         PKCS8_PRIV_KEY_INFO_free(p8);
 166         return NULL;
 167 }
 168
 169 PKCS8_PRIV_KEY_INFO *PKCS8_set_broken(PKCS8_PRIV_KEY_INFO *p8, int broken)
 170 {
 171         switch (broken) {
 172
 173                 case PKCS8_OK:
 174                 p8->broken = PKCS8_OK;
 175                 return p8;
 176                 break;
 177
 178                 case PKCS8_NO_OCTET:
 179                 p8->broken = PKCS8_NO_OCTET;
 180                 p8->pkey->type = V_ASN1_SEQUENCE;
 181                 return p8;
 182                 break;
 183
 184                 default:
 185                 EVPerr(EVP_F_PKCS8_SET_BROKEN,EVP_R_PKCS8_UNKNOWN_BROKEN_TYPE);
 186                 return NULL;
 187         }
 188 }
 189
 190 /* EVP_PKEY attribute functions */
 191
 192 int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
 193 {
 194         return X509at_get_attr_count(key->attributes);
 195 }
 196
 197 int EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid,
 198                           int lastpos)
 199 {
 200         return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
 201 }
 202
 203 int EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, ASN1_OBJECT *obj,
 204                           int lastpos)
 205 {
 206         return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
 207 }
 208
 209 X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
 210 {
 211         return X509at_get_attr(key->attributes, loc);
 212 }
 213
 214 X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
 215 {
 216         return X509at_delete_attr(key->attributes, loc);
 217 }
 218
 219 int EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
 220 {
 221         if(X509at_add1_attr(&key->attributes, attr)) return 1;
 222         return 0;
 223 }
 224
 225 int EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key,
 226                         const ASN1_OBJECT *obj, int type,
 227                         const unsigned char *bytes, int len)
 228 {
 229         if(X509at_add1_attr_by_OBJ(&key->attributes, obj,
 230                                 type, bytes, len)) return 1;
 231         return 0;
 232 }
 233
 234 int EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key,
 235                         int nid, int type,
 236                         const unsigned char *bytes, int len)
 237 {
 238         if(X509at_add1_attr_by_NID(&key->attributes, nid,
 239                                 type, bytes, len)) return 1;
 240         return 0;
 241 }
 242
 243 int EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key,
 244                         const char *attrname, int type,
 245                         const unsigned char *bytes, int len)
 246 {
 247         if(X509at_add1_attr_by_txt(&key->attributes, attrname,
 248                                 type, bytes, len)) return 1;
 249         return 0;
 250 }