1 /* $OpenBSD: a_pkey.c,v 1.8 2024/04/09 13:52:41 beck Exp $ */ 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 61 #include <openssl/opensslconf.h> 62 63 #include <openssl/asn1.h> 64 #include <openssl/bn.h> 65 #include <openssl/err.h> 66 #include <openssl/evp.h> 67 #include <openssl/objects.h> 68 #include <openssl/x509.h> 69 70 #include "asn1_local.h" 71 #include "evp_local.h" 72 73 EVP_PKEY * 74 d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp, long length) 75 { 76 const unsigned char *p = *pp; 77 EVP_PKEY *ret; 78 79 if ((a == NULL) || (*a == NULL)) { 80 if ((ret = EVP_PKEY_new()) == NULL) { 81 ASN1error(ERR_R_EVP_LIB); 82 return (NULL); 83 } 84 } else { 85 ret = *a; 86 } 87 88 if (!EVP_PKEY_set_type(ret, type)) { 89 ASN1error(ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE); 90 goto err; 91 } 92 93 if (!ret->ameth->old_priv_decode || 94 !ret->ameth->old_priv_decode(ret, pp, length)) { 95 if (ret->ameth->priv_decode) { 96 PKCS8_PRIV_KEY_INFO *p8 = NULL; 97 *pp = p; /* XXX */ 98 p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, pp, length); 99 if (!p8) 100 goto err; 101 EVP_PKEY_free(ret); 102 ret = EVP_PKCS82PKEY(p8); 103 PKCS8_PRIV_KEY_INFO_free(p8); 104 } else { 105 ASN1error(ERR_R_ASN1_LIB); 106 goto err; 107 } 108 } 109 if (a != NULL) 110 (*a) = ret; 111 return (ret); 112 113 err: 114 if (a == NULL || *a != ret) 115 EVP_PKEY_free(ret); 116 return (NULL); 117 } 118 LCRYPTO_ALIAS(d2i_PrivateKey); 119 120 int 121 i2d_PrivateKey(EVP_PKEY *a, unsigned char **pp) 122 { 123 if (a->ameth && a->ameth->old_priv_encode) { 124 return a->ameth->old_priv_encode(a, pp); 125 } 126 if (a->ameth && a->ameth->priv_encode) { 127 PKCS8_PRIV_KEY_INFO *p8 = EVP_PKEY2PKCS8(a); 128 int ret = i2d_PKCS8_PRIV_KEY_INFO(p8, pp); 129 PKCS8_PRIV_KEY_INFO_free(p8); 130 return ret; 131 } 132 ASN1error(ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE); 133 return (-1); 134 } 135 LCRYPTO_ALIAS(i2d_PrivateKey); 136 137 /* This works like d2i_PrivateKey() except it automatically works out the type */ 138 139 EVP_PKEY * 140 d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp, long length) 141 { 142 STACK_OF(ASN1_TYPE) *inkey; 143 const unsigned char *p; 144 int keytype; 145 146 p = *pp; 147 /* Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE): 148 * by analyzing it we can determine the passed structure: this 149 * assumes the input is surrounded by an ASN1 SEQUENCE. 150 */ 151 inkey = d2i_ASN1_SEQUENCE_ANY(NULL, &p, length); 152 /* Since we only need to discern "traditional format" RSA and DSA 153 * keys we can just count the elements. 154 */ 155 if (sk_ASN1_TYPE_num(inkey) == 6) 156 keytype = EVP_PKEY_DSA; 157 else if (sk_ASN1_TYPE_num(inkey) == 4) 158 keytype = EVP_PKEY_EC; 159 else if (sk_ASN1_TYPE_num(inkey) == 3) { 160 /* This seems to be PKCS8, not traditional format */ 161 PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO( 162 NULL, pp, length); 163 EVP_PKEY *ret; 164 165 sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free); 166 if (!p8) { 167 ASN1error(ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE); 168 return NULL; 169 } 170 ret = EVP_PKCS82PKEY(p8); 171 PKCS8_PRIV_KEY_INFO_free(p8); 172 if (a) { 173 *a = ret; 174 } 175 return ret; 176 } else 177 keytype = EVP_PKEY_RSA; 178 sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free); 179 return d2i_PrivateKey(keytype, a, pp, length); 180 } 181 LCRYPTO_ALIAS(d2i_AutoPrivateKey); 182