1 /* $OpenBSD: p8_pkey.c,v 1.20 2021/11/01 20:53:08 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 <string.h> 61 62 #include <openssl/asn1t.h> 63 #include <openssl/x509.h> 64 65 #include "x509_lcl.h" 66 67 /* Minor tweak to operation: zero private key data */ 68 static int 69 pkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) 70 { 71 /* Since the structure must still be valid use ASN1_OP_FREE_PRE */ 72 if (operation == ASN1_OP_FREE_PRE) { 73 PKCS8_PRIV_KEY_INFO *key = (PKCS8_PRIV_KEY_INFO *)*pval; 74 if (key->pkey != NULL) 75 explicit_bzero(key->pkey->data, key->pkey->length); 76 } 77 return 1; 78 } 79 80 static const ASN1_AUX PKCS8_PRIV_KEY_INFO_aux = { 81 .asn1_cb = pkey_cb, 82 }; 83 static const ASN1_TEMPLATE PKCS8_PRIV_KEY_INFO_seq_tt[] = { 84 { 85 .offset = offsetof(PKCS8_PRIV_KEY_INFO, version), 86 .field_name = "version", 87 .item = &ASN1_INTEGER_it, 88 }, 89 { 90 .offset = offsetof(PKCS8_PRIV_KEY_INFO, pkeyalg), 91 .field_name = "pkeyalg", 92 .item = &X509_ALGOR_it, 93 }, 94 { 95 .offset = offsetof(PKCS8_PRIV_KEY_INFO, pkey), 96 .field_name = "pkey", 97 .item = &ASN1_OCTET_STRING_it, 98 }, 99 { 100 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_SET_OF | ASN1_TFLG_OPTIONAL, 101 .offset = offsetof(PKCS8_PRIV_KEY_INFO, attributes), 102 .field_name = "attributes", 103 .item = &X509_ATTRIBUTE_it, 104 }, 105 }; 106 107 const ASN1_ITEM PKCS8_PRIV_KEY_INFO_it = { 108 .itype = ASN1_ITYPE_SEQUENCE, 109 .utype = V_ASN1_SEQUENCE, 110 .templates = PKCS8_PRIV_KEY_INFO_seq_tt, 111 .tcount = sizeof(PKCS8_PRIV_KEY_INFO_seq_tt) / sizeof(ASN1_TEMPLATE), 112 .funcs = &PKCS8_PRIV_KEY_INFO_aux, 113 .size = sizeof(PKCS8_PRIV_KEY_INFO), 114 .sname = "PKCS8_PRIV_KEY_INFO", 115 }; 116 117 118 PKCS8_PRIV_KEY_INFO * 119 d2i_PKCS8_PRIV_KEY_INFO(PKCS8_PRIV_KEY_INFO **a, const unsigned char **in, long len) 120 { 121 return (PKCS8_PRIV_KEY_INFO *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 122 &PKCS8_PRIV_KEY_INFO_it); 123 } 124 125 int 126 i2d_PKCS8_PRIV_KEY_INFO(PKCS8_PRIV_KEY_INFO *a, unsigned char **out) 127 { 128 return ASN1_item_i2d((ASN1_VALUE *)a, out, &PKCS8_PRIV_KEY_INFO_it); 129 } 130 131 PKCS8_PRIV_KEY_INFO * 132 PKCS8_PRIV_KEY_INFO_new(void) 133 { 134 return (PKCS8_PRIV_KEY_INFO *)ASN1_item_new(&PKCS8_PRIV_KEY_INFO_it); 135 } 136 137 void 138 PKCS8_PRIV_KEY_INFO_free(PKCS8_PRIV_KEY_INFO *a) 139 { 140 ASN1_item_free((ASN1_VALUE *)a, &PKCS8_PRIV_KEY_INFO_it); 141 } 142 143 int 144 PKCS8_pkey_set0(PKCS8_PRIV_KEY_INFO *priv, ASN1_OBJECT *aobj, int version, 145 int ptype, void *pval, unsigned char *penc, int penclen) 146 { 147 if (version >= 0) { 148 if (!ASN1_INTEGER_set(priv->version, version)) 149 return 0; 150 } 151 if (!X509_ALGOR_set0(priv->pkeyalg, aobj, ptype, pval)) 152 return 0; 153 if (penc != NULL) 154 ASN1_STRING_set0(priv->pkey, penc, penclen); 155 return 1; 156 } 157 158 int 159 PKCS8_pkey_get0(const ASN1_OBJECT **ppkalg, const unsigned char **pk, 160 int *ppklen, const X509_ALGOR **pa, const PKCS8_PRIV_KEY_INFO *p8) 161 { 162 if (ppkalg != NULL) 163 *ppkalg = p8->pkeyalg->algorithm; 164 if (pk != NULL) { 165 *pk = ASN1_STRING_data(p8->pkey); 166 *ppklen = ASN1_STRING_length(p8->pkey); 167 } 168 if (pa != NULL) 169 *pa = p8->pkeyalg; 170 return 1; 171 } 172 173 const STACK_OF(X509_ATTRIBUTE) * 174 PKCS8_pkey_get0_attrs(const PKCS8_PRIV_KEY_INFO *p8) 175 { 176 return p8->attributes; 177 } 178 179 int 180 PKCS8_pkey_add1_attr_by_NID(PKCS8_PRIV_KEY_INFO *p8, int nid, int type, 181 const unsigned char *bytes, int len) 182 { 183 if (X509at_add1_attr_by_NID(&p8->attributes, nid, type, bytes, 184 len) != NULL) 185 return 1; 186 return 0; 187 } 188 189