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#ifndef OPENSSL_NO_ENGINE 65#include <openssl/engine.h> 66#endif 67#include <openssl/x509.h> 68#include <openssl/asn1.h> 69#include "asn1_locl.h" 70 71EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp, 72 long length) 73 { 74 EVP_PKEY *ret; 75 76 if ((a == NULL) || (*a == NULL)) 77 { 78 if ((ret=EVP_PKEY_new()) == NULL) 79 { 80 ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_EVP_LIB); 81 return(NULL); 82 } 83 } 84 else 85 { 86 ret= *a; 87#ifndef OPENSSL_NO_ENGINE 88 if (ret->engine) 89 { 90 ENGINE_finish(ret->engine); 91 ret->engine = NULL; 92 } 93#endif 94 } 95 96 if (!EVP_PKEY_set_type(ret, type)) 97 { 98 ASN1err(ASN1_F_D2I_PRIVATEKEY,ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE); 99 goto err; 100 } 101 102 if (!ret->ameth->old_priv_decode || 103 !ret->ameth->old_priv_decode(ret, pp, length)) 104 { 105 if (ret->ameth->priv_decode) 106 { 107 PKCS8_PRIV_KEY_INFO *p8=NULL; 108 p8=d2i_PKCS8_PRIV_KEY_INFO(NULL,pp,length); 109 if (!p8) goto err; 110 EVP_PKEY_free(ret); 111 ret = EVP_PKCS82PKEY(p8); 112 PKCS8_PRIV_KEY_INFO_free(p8); 113 114 } 115 else 116 { 117 ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_ASN1_LIB); 118 goto err; 119 } 120 } 121 if (a != NULL) (*a)=ret; 122 return(ret); 123err: 124 if ((ret != NULL) && ((a == NULL) || (*a != ret))) EVP_PKEY_free(ret); 125 return(NULL); 126 } 127 128/* This works like d2i_PrivateKey() except it automatically works out the type */ 129 130EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp, 131 long length) 132{ 133 STACK_OF(ASN1_TYPE) *inkey; 134 const unsigned char *p; 135 int keytype; 136 p = *pp; 137 /* Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE): 138 * by analyzing it we can determine the passed structure: this 139 * assumes the input is surrounded by an ASN1 SEQUENCE. 140 */ 141 inkey = d2i_ASN1_SEQUENCE_ANY(NULL, &p, length); 142 /* Since we only need to discern "traditional format" RSA and DSA 143 * keys we can just count the elements. 144 */ 145 if(sk_ASN1_TYPE_num(inkey) == 6) 146 keytype = EVP_PKEY_DSA; 147 else if (sk_ASN1_TYPE_num(inkey) == 4) 148 keytype = EVP_PKEY_EC; 149 else if (sk_ASN1_TYPE_num(inkey) == 3) 150 { /* This seems to be PKCS8, not traditional format */ 151 PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL,pp,length); 152 EVP_PKEY *ret; 153 154 sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free); 155 if (!p8) 156 { 157 ASN1err(ASN1_F_D2I_AUTOPRIVATEKEY,ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE); 158 return NULL; 159 } 160 ret = EVP_PKCS82PKEY(p8); 161 PKCS8_PRIV_KEY_INFO_free(p8); 162 if (a) { 163 *a = ret; 164 } 165 return ret; 166 } 167 else keytype = EVP_PKEY_RSA; 168 sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free); 169 return d2i_PrivateKey(keytype, a, pp, length); 170} 171