crypto/evp/evp_pkey.c

   1 /* evp_pkey.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   4  * 1999.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59
  60 #include <stdio.h>
  61 #include <stdlib.h>
  62 #include "cryptlib.h"
  63 #include <openssl/x509.h>
  64 #include <openssl/rand.h>
  65 #include "internal/asn1_int.h"
  66
  67 /* Extract a private key from a PKCS8 structure */
  68
  69 EVP_PKEY *EVP_PKCS82PKEY(PKCS8_PRIV_KEY_INFO *p8)
  70 {
  71     EVP_PKEY *pkey = NULL;
  72     ASN1_OBJECT *algoid;
  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()) == NULL) {
  79         EVPerr(EVP_F_EVP_PKCS82PKEY, ERR_R_MALLOC_FAILURE);
  80         return NULL;
  81     }
  82
  83     if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(algoid))) {
  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         if (!pkey->ameth->priv_decode(pkey, p8)) {
  92             EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_PRIVATE_KEY_DECODE_ERROR);
  93             goto error;
  94         }
  95     } else {
  96         EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_METHOD_NOT_SUPPORTED);
  97         goto error;
  98     }
  99
 100     return pkey;
 101
 102  error:
 103     EVP_PKEY_free(pkey);
 104     return NULL;
 105 }
 106
 107 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(EVP_PKEY *pkey)
 108 {
 109     return EVP_PKEY2PKCS8_broken(pkey, PKCS8_OK);
 110 }
 111
 112 /* Turn a private key into a PKCS8 structure */
 113
 114 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8_broken(EVP_PKEY *pkey, int broken)
 115 {
 116     PKCS8_PRIV_KEY_INFO *p8;
 117
 118     if ((p8 = PKCS8_PRIV_KEY_INFO_new()) == NULL) {
 119         EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN, ERR_R_MALLOC_FAILURE);
 120         return NULL;
 121     }
 122     p8->broken = broken;
 123
 124     if (pkey->ameth) {
 125         if (pkey->ameth->priv_encode) {
 126             if (!pkey->ameth->priv_encode(p8, pkey)) {
 127                 EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
 128                        EVP_R_PRIVATE_KEY_ENCODE_ERROR);
 129                 goto error;
 130             }
 131         } else {
 132             EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN, EVP_R_METHOD_NOT_SUPPORTED);
 133             goto error;
 134         }
 135     } else {
 136         EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
 137                EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
 138         goto error;
 139     }
 140     RAND_add(p8->pkey->value.octet_string->data,
 141              p8->pkey->value.octet_string->length, 0.0);
 142     return p8;
 143  error:
 144     PKCS8_PRIV_KEY_INFO_free(p8);
 145     return NULL;
 146 }
 147
 148 PKCS8_PRIV_KEY_INFO *PKCS8_set_broken(PKCS8_PRIV_KEY_INFO *p8, int broken)
 149 {
 150     switch (broken) {
 151
 152     case PKCS8_OK:
 153         p8->broken = PKCS8_OK;
 154         return p8;
 155
 156     case PKCS8_NO_OCTET:
 157         p8->broken = PKCS8_NO_OCTET;
 158         p8->pkey->type = V_ASN1_SEQUENCE;
 159         return p8;
 160
 161     default:
 162         EVPerr(EVP_F_PKCS8_SET_BROKEN, EVP_R_PKCS8_UNKNOWN_BROKEN_TYPE);
 163         return NULL;
 164     }
 165 }
 166
 167 /* EVP_PKEY attribute functions */
 168
 169 int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
 170 {
 171     return X509at_get_attr_count(key->attributes);
 172 }
 173
 174 int EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid, int lastpos)
 175 {
 176     return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
 177 }
 178
 179 int EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, ASN1_OBJECT *obj,
 180                              int lastpos)
 181 {
 182     return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
 183 }
 184
 185 X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
 186 {
 187     return X509at_get_attr(key->attributes, loc);
 188 }
 189
 190 X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
 191 {
 192     return X509at_delete_attr(key->attributes, loc);
 193 }
 194
 195 int EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
 196 {
 197     if (X509at_add1_attr(&key->attributes, attr))
 198         return 1;
 199     return 0;
 200 }
 201
 202 int EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key,
 203                               const ASN1_OBJECT *obj, int type,
 204                               const unsigned char *bytes, int len)
 205 {
 206     if (X509at_add1_attr_by_OBJ(&key->attributes, obj, type, bytes, len))
 207         return 1;
 208     return 0;
 209 }
 210
 211 int EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key,
 212                               int nid, int type,
 213                               const unsigned char *bytes, int len)
 214 {
 215     if (X509at_add1_attr_by_NID(&key->attributes, nid, type, bytes, len))
 216         return 1;
 217     return 0;
 218 }
 219
 220 int EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key,
 221                               const char *attrname, int type,
 222                               const unsigned char *bytes, int len)
 223 {
 224     if (X509at_add1_attr_by_txt(&key->attributes, attrname, type, bytes, len))
 225         return 1;
 226     return 0;
 227 }