crypto/asn1/d2i_pr.c

   1 /* crypto/asn1/d2i_pr.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/bn.h>
  62 #include <openssl/evp.h>
  63 #include <openssl/objects.h>
  64 #include <openssl/asn1.h>
  65 #ifndef OPENSSL_NO_RSA
  66 #include <openssl/rsa.h>
  67 #endif
  68 #ifndef OPENSSL_NO_DSA
  69 #include <openssl/dsa.h>
  70 #endif
  71 #ifndef OPENSSL_NO_ECDSA
  72 #include <openssl/ecdsa.h>
  73 #endif
  74
  75 EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, unsigned char **pp,
  76              long length)
  77         {
  78         EVP_PKEY *ret;
  79
  80         if ((a == NULL) || (*a == NULL))
  81                 {
  82                 if ((ret=EVP_PKEY_new()) == NULL)
  83                         {
  84                         ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_EVP_LIB);
  85                         return(NULL);
  86                         }
  87                 }
  88         else    ret= *a;
  89
  90         ret->save_type=type;
  91         ret->type=EVP_PKEY_type(type);
  92         switch (ret->type)
  93                 {
  94 #ifndef OPENSSL_NO_RSA
  95         case EVP_PKEY_RSA:
  96                 if ((ret->pkey.rsa=d2i_RSAPrivateKey(NULL,
  97                         (const unsigned char **)pp,length)) == NULL) /* TMP UGLY CAST */
  98                         {
  99                         ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_ASN1_LIB);
 100                         goto err;
 101                         }
 102                 break;
 103 #endif
 104 #ifndef OPENSSL_NO_DSA
 105         case EVP_PKEY_DSA:
 106                 if ((ret->pkey.dsa=d2i_DSAPrivateKey(NULL,
 107                         (const unsigned char **)pp,length)) == NULL) /* TMP UGLY CAST */
 108                         {
 109                         ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_ASN1_LIB);
 110                         goto err;
 111                         }
 112                 break;
 113 #endif
 114 #ifndef OPENSSL_NO_ECDSA
 115         case EVP_PKEY_ECDSA:
 116                 if ((ret->pkey.ecdsa = d2i_ECDSAPrivateKey(NULL,
 117                         (const unsigned char **)pp, length)) == NULL)
 118                         {
 119                         ASN1err(ASN1_F_D2I_PRIVATEKEY, ERR_R_ASN1_LIB);
 120                         goto err;
 121                         }
 122                 break;
 123 #endif
 124         default:
 125                 ASN1err(ASN1_F_D2I_PRIVATEKEY,ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
 126                 goto err;
 127                 /* break; */
 128                 }
 129         if (a != NULL) (*a)=ret;
 130         return(ret);
 131 err:
 132         if ((ret != NULL) && ((a == NULL) || (*a != ret))) EVP_PKEY_free(ret);
 133         return(NULL);
 134         }
 135
 136 /* This works like d2i_PrivateKey() except it automatically works out the type */
 137
 138 EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, unsigned char **pp,
 139              long length)
 140 {
 141         STACK_OF(ASN1_TYPE) *inkey;
 142         unsigned char *p;
 143         int keytype;
 144         p = *pp;
 145         /* Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE):
 146          * by analyzing it we can determine the passed structure: this
 147          * assumes the input is surrounded by an ASN1 SEQUENCE.
 148          */
 149         inkey = d2i_ASN1_SET_OF_ASN1_TYPE(NULL, &p, length, d2i_ASN1_TYPE,
 150                         ASN1_TYPE_free, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL);
 151         /* Since we only need to discern "traditional format" RSA and DSA
 152          * keys we can just count the elements.
 153          */
 154         if(sk_ASN1_TYPE_num(inkey) == 6)
 155                 keytype = EVP_PKEY_DSA;
 156         else if (sk_ASN1_TYPE_num(inkey) == 4)
 157                 keytype = EVP_PKEY_ECDSA;
 158         else keytype = EVP_PKEY_RSA;
 159         sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
 160         return d2i_PrivateKey(keytype, a, pp, length);
 161 }