crypto/asn1/d2i_pu.c

   1 /*
   2  * Copyright 1995-2020 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 /*
  11  * DSA low level APIs are deprecated for public use, but still ok for
  12  * internal use.
  13  */
  14 #include "internal/deprecated.h"
  15
  16 #include <stdio.h>
  17 #include "internal/cryptlib.h"
  18 #include <openssl/bn.h>
  19 #include <openssl/evp.h>
  20 #include <openssl/objects.h>
  21 #include <openssl/asn1.h>
  22 #include <openssl/rsa.h>
  23 #include <openssl/dsa.h>
  24 #include <openssl/ec.h>
  25
  26 #include "crypto/evp.h"
  27
  28 EVP_PKEY *d2i_PublicKey(int type, EVP_PKEY **a, const unsigned char **pp,
  29                         long length)
  30 {
  31     EVP_PKEY *ret;
  32
  33     if ((a == NULL) || (*a == NULL)) {
  34         if ((ret = EVP_PKEY_new()) == NULL) {
  35             ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
  36             return NULL;
  37         }
  38     } else
  39         ret = *a;
  40
  41     if (type != EVP_PKEY_get_id(ret) && !EVP_PKEY_set_type(ret, type)) {
  42         ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
  43         goto err;
  44     }
  45
  46     switch (EVP_PKEY_get_id(ret)) {
  47     case EVP_PKEY_RSA:
  48         if ((ret->pkey.rsa = d2i_RSAPublicKey(NULL, pp, length)) == NULL) {
  49             ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
  50             goto err;
  51         }
  52         break;
  53 #ifndef OPENSSL_NO_DSA
  54     case EVP_PKEY_DSA:
  55         /* TMP UGLY CAST */
  56         if (!d2i_DSAPublicKey(&ret->pkey.dsa, pp, length)) {
  57             ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
  58             goto err;
  59         }
  60         break;
  61 #endif
  62 #ifndef OPENSSL_NO_EC
  63     case EVP_PKEY_EC:
  64         if (!o2i_ECPublicKey(&ret->pkey.ec, pp, length)) {
  65             ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
  66             goto err;
  67         }
  68         break;
  69 #endif
  70     default:
  71         ERR_raise(ERR_LIB_ASN1, ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
  72         goto err;
  73     }
  74     if (a != NULL)
  75         (*a) = ret;
  76     return ret;
  77  err:
  78     if (a == NULL || *a != ret)
  79         EVP_PKEY_free(ret);
  80     return NULL;
  81 }