crypto/asn1/d2i_pu.c

   1 /*
   2  * Copyright 1995-2016 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 "internal/cryptlib.h"
  12 #include <openssl/bn.h>
  13 #include <openssl/evp.h>
  14 #include <openssl/objects.h>
  15 #include <openssl/asn1.h>
  16 #include <openssl/rsa.h>
  17 #include <openssl/dsa.h>
  18 #include <openssl/ec.h>
  19
  20 #include "internal/evp_int.h"
  21
  22 EVP_PKEY *d2i_PublicKey(int type, EVP_PKEY **a, const unsigned char **pp,
  23                         long length)
  24 {
  25     EVP_PKEY *ret;
  26
  27     if ((a == NULL) || (*a == NULL)) {
  28         if ((ret = EVP_PKEY_new()) == NULL) {
  29             ASN1err(ASN1_F_D2I_PUBLICKEY, ERR_R_EVP_LIB);
  30             return NULL;
  31         }
  32     } else
  33         ret = *a;
  34
  35     if (!EVP_PKEY_set_type(ret, type)) {
  36         ASN1err(ASN1_F_D2I_PUBLICKEY, ERR_R_EVP_LIB);
  37         goto err;
  38     }
  39
  40     switch (EVP_PKEY_id(ret)) {
  41 #ifndef OPENSSL_NO_RSA
  42     case EVP_PKEY_RSA:
  43         if ((ret->pkey.rsa = d2i_RSAPublicKey(NULL, pp, length)) == NULL) {
  44             ASN1err(ASN1_F_D2I_PUBLICKEY, ERR_R_ASN1_LIB);
  45             goto err;
  46         }
  47         break;
  48 #endif
  49 #ifndef OPENSSL_NO_DSA
  50     case EVP_PKEY_DSA:
  51         /* TMP UGLY CAST */
  52         if (!d2i_DSAPublicKey(&ret->pkey.dsa, pp, length)) {
  53             ASN1err(ASN1_F_D2I_PUBLICKEY, ERR_R_ASN1_LIB);
  54             goto err;
  55         }
  56         break;
  57 #endif
  58 #ifndef OPENSSL_NO_EC
  59     case EVP_PKEY_EC:
  60         if (!o2i_ECPublicKey(&ret->pkey.ec, pp, length)) {
  61             ASN1err(ASN1_F_D2I_PUBLICKEY, ERR_R_ASN1_LIB);
  62             goto err;
  63         }
  64         break;
  65 #endif
  66     default:
  67         ASN1err(ASN1_F_D2I_PUBLICKEY, ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
  68         goto err;
  69     }
  70     if (a != NULL)
  71         (*a) = ret;
  72     return ret;
  73  err:
  74     if (a == NULL || *a != ret)
  75         EVP_PKEY_free(ret);
  76     return NULL;
  77 }