1 /* crypto/asn1/d2i_pr.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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_EC 72 #include <openssl/ec.h> 73 #endif 74 75 EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const 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_EC 115 case EVP_PKEY_EC: 116 if ((ret->pkey.ec = d2i_ECPrivateKey(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, const unsigned char **pp, 139 long length) 140 { 141 STACK_OF(ASN1_TYPE) *inkey; 142 const 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_EC; 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 } 162
