crypto/evp/evp_pkey.c

   1 /*
   2  * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include "internal/cryptlib.h"
  13 #include <openssl/x509.h>
  14 #include <openssl/rand.h>
  15 #include "internal/asn1_int.h"
  16 #include "internal/evp_int.h"
  17 #include "internal/x509_int.h"
  18
  19 /* Extract a private key from a PKCS8 structure */
  20
  21 EVP_PKEY *EVP_PKCS82PKEY(PKCS8_PRIV_KEY_INFO *p8)
  22 {
  23     EVP_PKEY *pkey = NULL;
  24     ASN1_OBJECT *algoid;
  25     char obj_tmp[80];
  26
  27     if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8))
  28         return NULL;
  29
  30     if ((pkey = EVP_PKEY_new()) == NULL) {
  31         EVPerr(EVP_F_EVP_PKCS82PKEY, ERR_R_MALLOC_FAILURE);
  32         return NULL;
  33     }
  34
  35     if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(algoid))) {
  36         EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
  37         i2t_ASN1_OBJECT(obj_tmp, 80, algoid);
  38         ERR_add_error_data(2, "TYPE=", obj_tmp);
  39         goto error;
  40     }
  41
  42     if (pkey->ameth->priv_decode) {
  43         if (!pkey->ameth->priv_decode(pkey, p8)) {
  44             EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_PRIVATE_KEY_DECODE_ERROR);
  45             goto error;
  46         }
  47     } else {
  48         EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_METHOD_NOT_SUPPORTED);
  49         goto error;
  50     }
  51
  52     return pkey;
  53
  54  error:
  55     EVP_PKEY_free(pkey);
  56     return NULL;
  57 }
  58
  59 /* Turn a private key into a PKCS8 structure */
  60
  61 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(EVP_PKEY *pkey)
  62 {
  63     PKCS8_PRIV_KEY_INFO *p8 = PKCS8_PRIV_KEY_INFO_new();
  64     if (p8  == NULL) {
  65         EVPerr(EVP_F_EVP_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
  66         return NULL;
  67     }
  68
  69     if (pkey->ameth) {
  70         if (pkey->ameth->priv_encode) {
  71             if (!pkey->ameth->priv_encode(p8, pkey)) {
  72                 EVPerr(EVP_F_EVP_PKEY2PKCS8, EVP_R_PRIVATE_KEY_ENCODE_ERROR);
  73                 goto error;
  74             }
  75         } else {
  76             EVPerr(EVP_F_EVP_PKEY2PKCS8, EVP_R_METHOD_NOT_SUPPORTED);
  77             goto error;
  78         }
  79     } else {
  80         EVPerr(EVP_F_EVP_PKEY2PKCS8, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
  81         goto error;
  82     }
  83     RAND_add(p8->pkey->data, p8->pkey->length, 0.0);
  84     return p8;
  85  error:
  86     PKCS8_PRIV_KEY_INFO_free(p8);
  87     return NULL;
  88 }
  89
  90 /* EVP_PKEY attribute functions */
  91
  92 int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
  93 {
  94     return X509at_get_attr_count(key->attributes);
  95 }
  96
  97 int EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid, int lastpos)
  98 {
  99     return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
 100 }
 101
 102 int EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, ASN1_OBJECT *obj,
 103                              int lastpos)
 104 {
 105     return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
 106 }
 107
 108 X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
 109 {
 110     return X509at_get_attr(key->attributes, loc);
 111 }
 112
 113 X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
 114 {
 115     return X509at_delete_attr(key->attributes, loc);
 116 }
 117
 118 int EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
 119 {
 120     if (X509at_add1_attr(&key->attributes, attr))
 121         return 1;
 122     return 0;
 123 }
 124
 125 int EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key,
 126                               const ASN1_OBJECT *obj, int type,
 127                               const unsigned char *bytes, int len)
 128 {
 129     if (X509at_add1_attr_by_OBJ(&key->attributes, obj, type, bytes, len))
 130         return 1;
 131     return 0;
 132 }
 133
 134 int EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key,
 135                               int nid, int type,
 136                               const unsigned char *bytes, int len)
 137 {
 138     if (X509at_add1_attr_by_NID(&key->attributes, nid, type, bytes, len))
 139         return 1;
 140     return 0;
 141 }
 142
 143 int EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key,
 144                               const char *attrname, int type,
 145                               const unsigned char *bytes, int len)
 146 {
 147     if (X509at_add1_attr_by_txt(&key->attributes, attrname, type, bytes, len))
 148         return 1;
 149     return 0;
 150 }