1 /* $OpenBSD: evp_pkey.c,v 1.24 2021/12/12 21:30:13 tb Exp $ */ 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 3 * project 1999. 4 */ 5 /* ==================================================================== 6 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. All advertising materials mentioning features or use of this 21 * software must display the following acknowledgment: 22 * "This product includes software developed by the OpenSSL Project 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24 * 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26 * endorse or promote products derived from this software without 27 * prior written permission. For written permission, please contact 28 * licensing@OpenSSL.org. 29 * 30 * 5. Products derived from this software may not be called "OpenSSL" 31 * nor may "OpenSSL" appear in their names without prior written 32 * permission of the OpenSSL Project. 33 * 34 * 6. Redistributions of any form whatsoever must retain the following 35 * acknowledgment: 36 * "This product includes software developed by the OpenSSL Project 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50 * OF THE POSSIBILITY OF SUCH DAMAGE. 51 * ==================================================================== 52 * 53 * This product includes cryptographic software written by Eric Young 54 * (eay@cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh@cryptsoft.com). 56 * 57 */ 58 59 #include <stdio.h> 60 #include <stdlib.h> 61 62 #include <openssl/err.h> 63 #include <openssl/x509.h> 64 65 #include "asn1_locl.h" 66 #include "evp_locl.h" 67 68 /* Extract a private key from a PKCS8 structure */ 69 70 EVP_PKEY * 71 EVP_PKCS82PKEY(const PKCS8_PRIV_KEY_INFO *p8) 72 { 73 EVP_PKEY *pkey = NULL; 74 const ASN1_OBJECT *algoid; 75 char obj_tmp[80]; 76 77 if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8)) 78 return NULL; 79 80 if (!(pkey = EVP_PKEY_new())) { 81 EVPerror(ERR_R_MALLOC_FAILURE); 82 return NULL; 83 } 84 85 if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(algoid))) { 86 EVPerror(EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM); 87 i2t_ASN1_OBJECT(obj_tmp, 80, algoid); 88 ERR_asprintf_error_data("TYPE=%s", obj_tmp); 89 goto error; 90 } 91 92 if (pkey->ameth->priv_decode) { 93 if (!pkey->ameth->priv_decode(pkey, p8)) { 94 EVPerror(EVP_R_PRIVATE_KEY_DECODE_ERROR); 95 goto error; 96 } 97 } else { 98 EVPerror(EVP_R_METHOD_NOT_SUPPORTED); 99 goto error; 100 } 101 102 return pkey; 103 104 error: 105 EVP_PKEY_free(pkey); 106 return NULL; 107 } 108 109 /* Turn a private key into a PKCS8 structure */ 110 111 PKCS8_PRIV_KEY_INFO * 112 EVP_PKEY2PKCS8(EVP_PKEY *pkey) 113 { 114 PKCS8_PRIV_KEY_INFO *p8; 115 116 if (!(p8 = PKCS8_PRIV_KEY_INFO_new())) { 117 EVPerror(ERR_R_MALLOC_FAILURE); 118 return NULL; 119 } 120 121 if (pkey->ameth) { 122 if (pkey->ameth->priv_encode) { 123 if (!pkey->ameth->priv_encode(p8, pkey)) { 124 EVPerror(EVP_R_PRIVATE_KEY_ENCODE_ERROR); 125 goto error; 126 } 127 } else { 128 EVPerror(EVP_R_METHOD_NOT_SUPPORTED); 129 goto error; 130 } 131 } else { 132 EVPerror(EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM); 133 goto error; 134 } 135 return p8; 136 137 error: 138 PKCS8_PRIV_KEY_INFO_free(p8); 139 return NULL; 140 } 141 142 /* EVP_PKEY attribute functions */ 143 144 int 145 EVP_PKEY_get_attr_count(const EVP_PKEY *key) 146 { 147 return X509at_get_attr_count(key->attributes); 148 } 149 150 int 151 EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid, int lastpos) 152 { 153 return X509at_get_attr_by_NID(key->attributes, nid, lastpos); 154 } 155 156 int 157 EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, const ASN1_OBJECT *obj, 158 int lastpos) 159 { 160 return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos); 161 } 162 163 X509_ATTRIBUTE * 164 EVP_PKEY_get_attr(const EVP_PKEY *key, int loc) 165 { 166 return X509at_get_attr(key->attributes, loc); 167 } 168 169 X509_ATTRIBUTE * 170 EVP_PKEY_delete_attr(EVP_PKEY *key, int loc) 171 { 172 return X509at_delete_attr(key->attributes, loc); 173 } 174 175 int 176 EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr) 177 { 178 if (X509at_add1_attr(&key->attributes, attr)) 179 return 1; 180 return 0; 181 } 182 183 int 184 EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key, const ASN1_OBJECT *obj, int type, 185 const unsigned char *bytes, int len) 186 { 187 if (X509at_add1_attr_by_OBJ(&key->attributes, obj, type, bytes, len)) 188 return 1; 189 return 0; 190 } 191 192 int 193 EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key, int nid, int type, 194 const unsigned char *bytes, int len) 195 { 196 if (X509at_add1_attr_by_NID(&key->attributes, nid, type, bytes, len)) 197 return 1; 198 return 0; 199 } 200 201 int 202 EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key, const char *attrname, int type, 203 const unsigned char *bytes, int len) 204 { 205 if (X509at_add1_attr_by_txt(&key->attributes, attrname, type, 206 bytes, len)) 207 return 1; 208 return 0; 209 } 210