crypto/evp/evp_pkey.c

   1 /*
   2  * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 "crypto/asn1.h"
  16 #include "crypto/evp.h"
  17 #include "crypto/x509.h"
  18
  19 /* Extract a private key from a PKCS8 structure */
  20
  21 EVP_PKEY *EVP_PKCS82PKEY(const PKCS8_PRIV_KEY_INFO *p8)
  22 {
  23     EVP_PKEY *pkey = NULL;
  24     const 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(const 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     return p8;
  84  error:
  85     PKCS8_PRIV_KEY_INFO_free(p8);
  86     return NULL;
  87 }
  88
  89 /* EVP_PKEY attribute functions */
  90
  91 int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
  92 {
  93     return X509at_get_attr_count(key->attributes);
  94 }
  95
  96 int EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid, int lastpos)
  97 {
  98     return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
  99 }
 100
 101 int EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, const ASN1_OBJECT *obj,
 102                              int lastpos)
 103 {
 104     return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
 105 }
 106
 107 X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
 108 {
 109     return X509at_get_attr(key->attributes, loc);
 110 }
 111
 112 X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
 113 {
 114     return X509at_delete_attr(key->attributes, loc);
 115 }
 116
 117 int EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
 118 {
 119     if (X509at_add1_attr(&key->attributes, attr))
 120         return 1;
 121     return 0;
 122 }
 123
 124 int EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key,
 125                               const ASN1_OBJECT *obj, int type,
 126                               const unsigned char *bytes, int len)
 127 {
 128     if (X509at_add1_attr_by_OBJ(&key->attributes, obj, type, bytes, len))
 129         return 1;
 130     return 0;
 131 }
 132
 133 int EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key,
 134                               int nid, int type,
 135                               const unsigned char *bytes, int len)
 136 {
 137     if (X509at_add1_attr_by_NID(&key->attributes, nid, type, bytes, len))
 138         return 1;
 139     return 0;
 140 }
 141
 142 int EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key,
 143                               const char *attrname, int type,
 144                               const unsigned char *bytes, int len)
 145 {
 146     if (X509at_add1_attr_by_txt(&key->attributes, attrname, type, bytes, len))
 147         return 1;
 148     return 0;
 149 }