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 #include "../asn1/asn1_locl.h"
  73
  74 /* Extract a private key from a PKCS8 structure */
  75
  76 EVP_PKEY *EVP_PKCS82PKEY(PKCS8_PRIV_KEY_INFO *p8)
  77 {
  78         EVP_PKEY *pkey = NULL;
  79         ASN1_OBJECT *algoid;
  80         const EVP_PKEY_ASN1_METHOD *meth;
  81         char obj_tmp[80];
  82
  83         if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8))
  84                 return NULL;
  85
  86         if (!(pkey = EVP_PKEY_new())) {
  87                 EVPerr(EVP_F_EVP_PKCS82PKEY,ERR_R_MALLOC_FAILURE);
  88                 return NULL;
  89         }
  90
  91         meth = EVP_PKEY_ASN1_find(OBJ_obj2nid(algoid));
  92
  93         if (meth)
  94                 {
  95                 if (meth->priv_decode)
  96                         {
  97                         if (!meth->priv_decode(pkey, p8))
  98                                 {
  99                                 EVPerr(EVP_F_EVP_PKCS82PKEY,
 100                                         EVP_R_PRIVATE_KEY_DECODE_ERROR);
 101                                 goto error;
 102                                 }
 103                         }
 104                 else
 105                         {
 106                         EVPerr(EVP_F_EVP_PKCS82PKEY,
 107                                         EVP_R_METHOD_NOT_SUPPORTED);
 108                         goto error;
 109                         }
 110                 }
 111         else
 112                 {
 113                 EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
 114                 i2t_ASN1_OBJECT(obj_tmp, 80, algoid);
 115                 ERR_add_error_data(2, "TYPE=", obj_tmp);
 116                 goto error;
 117                 }
 118         return pkey;
 119
 120         error:
 121         EVP_PKEY_free (pkey);
 122         return NULL;
 123 }
 124
 125 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(EVP_PKEY *pkey)
 126 {
 127         return EVP_PKEY2PKCS8_broken(pkey, PKCS8_OK);
 128 }
 129
 130 /* Turn a private key into a PKCS8 structure */
 131
 132 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8_broken(EVP_PKEY *pkey, int broken)
 133 {
 134         PKCS8_PRIV_KEY_INFO *p8;
 135         const EVP_PKEY_ASN1_METHOD *meth;
 136
 137         if (!(p8 = PKCS8_PRIV_KEY_INFO_new())) {
 138                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,ERR_R_MALLOC_FAILURE);
 139                 return NULL;
 140         }
 141         p8->broken = broken;
 142
 143         meth = EVP_PKEY_ASN1_find(pkey->type);
 144
 145         if (meth)
 146                 {
 147                 if (meth->priv_encode)
 148                         {
 149                         if (!meth->priv_encode(p8, pkey))
 150                                 {
 151                                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
 152                                         EVP_R_PRIVATE_KEY_ENCODE_ERROR);
 153                                 goto error;
 154                                 }
 155                         }
 156                 else
 157                         {
 158                         EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
 159                                         EVP_R_METHOD_NOT_SUPPORTED);
 160                         goto error;
 161                         }
 162                 }
 163         else
 164                 {
 165                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
 166                                 EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
 167                 goto error;
 168                 }
 169         RAND_add(p8->pkey->value.octet_string->data,
 170                  p8->pkey->value.octet_string->length, 0.0);
 171         return p8;
 172         error:
 173         PKCS8_PRIV_KEY_INFO_free(p8);
 174         return NULL;
 175 }
 176
 177 PKCS8_PRIV_KEY_INFO *PKCS8_set_broken(PKCS8_PRIV_KEY_INFO *p8, int broken)
 178 {
 179         switch (broken) {
 180
 181                 case PKCS8_OK:
 182                 p8->broken = PKCS8_OK;
 183                 return p8;
 184                 break;
 185
 186                 case PKCS8_NO_OCTET:
 187                 p8->broken = PKCS8_NO_OCTET;
 188                 p8->pkey->type = V_ASN1_SEQUENCE;
 189                 return p8;
 190                 break;
 191
 192                 default:
 193                 EVPerr(EVP_F_PKCS8_SET_BROKEN,EVP_R_PKCS8_UNKNOWN_BROKEN_TYPE);
 194                 return NULL;
 195         }
 196 }
 197
 198 /* EVP_PKEY attribute functions */
 199
 200 int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
 201 {
 202         return X509at_get_attr_count(key->attributes);
 203 }
 204
 205 int EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid,
 206                           int lastpos)
 207 {
 208         return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
 209 }
 210
 211 int EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, ASN1_OBJECT *obj,
 212                           int lastpos)
 213 {
 214         return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
 215 }
 216
 217 X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
 218 {
 219         return X509at_get_attr(key->attributes, loc);
 220 }
 221
 222 X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
 223 {
 224         return X509at_delete_attr(key->attributes, loc);
 225 }
 226
 227 int EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
 228 {
 229         if(X509at_add1_attr(&key->attributes, attr)) return 1;
 230         return 0;
 231 }
 232
 233 int EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key,
 234                         const ASN1_OBJECT *obj, int type,
 235                         const unsigned char *bytes, int len)
 236 {
 237         if(X509at_add1_attr_by_OBJ(&key->attributes, obj,
 238                                 type, bytes, len)) return 1;
 239         return 0;
 240 }
 241
 242 int EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key,
 243                         int nid, int type,
 244                         const unsigned char *bytes, int len)
 245 {
 246         if(X509at_add1_attr_by_NID(&key->attributes, nid,
 247                                 type, bytes, len)) return 1;
 248         return 0;
 249 }
 250
 251 int EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key,
 252                         const char *attrname, int type,
 253                         const unsigned char *bytes, int len)
 254 {
 255         if(X509at_add1_attr_by_txt(&key->attributes, attrname,
 256                                 type, bytes, len)) return 1;
 257         return 0;
 258 }