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