1 /* $OpenBSD: p8_pkey.c,v 1.16 2015/07/16 18:21:57 miod 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 /* Minor tweak to operation: zero private key data */ 66 static int 67 pkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) 68 { 69 /* Since the structure must still be valid use ASN1_OP_FREE_PRE */ 70 if (operation == ASN1_OP_FREE_PRE) { 71 PKCS8_PRIV_KEY_INFO *key = (PKCS8_PRIV_KEY_INFO *)*pval; 72 if (key->pkey != NULL && 73 key->pkey->type == V_ASN1_OCTET_STRING && 74 key->pkey->value.octet_string != NULL) 75 explicit_bzero(key->pkey->value.octet_string->data, 76 key->pkey->value.octet_string->length); 77 } 78 return 1; 79 } 80 81 static const ASN1_AUX PKCS8_PRIV_KEY_INFO_aux = { 82 .asn1_cb = pkey_cb, 83 }; 84 static const ASN1_TEMPLATE PKCS8_PRIV_KEY_INFO_seq_tt[] = { 85 { 86 .offset = offsetof(PKCS8_PRIV_KEY_INFO, version), 87 .field_name = "version", 88 .item = &ASN1_INTEGER_it, 89 }, 90 { 91 .offset = offsetof(PKCS8_PRIV_KEY_INFO, pkeyalg), 92 .field_name = "pkeyalg", 93 .item = &X509_ALGOR_it, 94 }, 95 { 96 .offset = offsetof(PKCS8_PRIV_KEY_INFO, pkey), 97 .field_name = "pkey", 98 .item = &ASN1_ANY_it, 99 }, 100 { 101 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_SET_OF | ASN1_TFLG_OPTIONAL, 102 .offset = offsetof(PKCS8_PRIV_KEY_INFO, attributes), 103 .field_name = "attributes", 104 .item = &X509_ATTRIBUTE_it, 105 }, 106 }; 107 108 const ASN1_ITEM PKCS8_PRIV_KEY_INFO_it = { 109 .itype = ASN1_ITYPE_SEQUENCE, 110 .utype = V_ASN1_SEQUENCE, 111 .templates = PKCS8_PRIV_KEY_INFO_seq_tt, 112 .tcount = sizeof(PKCS8_PRIV_KEY_INFO_seq_tt) / sizeof(ASN1_TEMPLATE), 113 .funcs = &PKCS8_PRIV_KEY_INFO_aux, 114 .size = sizeof(PKCS8_PRIV_KEY_INFO), 115 .sname = "PKCS8_PRIV_KEY_INFO", 116 }; 117 118 119 PKCS8_PRIV_KEY_INFO * 120 d2i_PKCS8_PRIV_KEY_INFO(PKCS8_PRIV_KEY_INFO **a, const unsigned char **in, long len) 121 { 122 return (PKCS8_PRIV_KEY_INFO *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, 123 &PKCS8_PRIV_KEY_INFO_it); 124 } 125 126 int 127 i2d_PKCS8_PRIV_KEY_INFO(PKCS8_PRIV_KEY_INFO *a, unsigned char **out) 128 { 129 return ASN1_item_i2d((ASN1_VALUE *)a, out, &PKCS8_PRIV_KEY_INFO_it); 130 } 131 132 PKCS8_PRIV_KEY_INFO * 133 PKCS8_PRIV_KEY_INFO_new(void) 134 { 135 return (PKCS8_PRIV_KEY_INFO *)ASN1_item_new(&PKCS8_PRIV_KEY_INFO_it); 136 } 137 138 void 139 PKCS8_PRIV_KEY_INFO_free(PKCS8_PRIV_KEY_INFO *a) 140 { 141 ASN1_item_free((ASN1_VALUE *)a, &PKCS8_PRIV_KEY_INFO_it); 142 } 143 144 int 145 PKCS8_pkey_set0(PKCS8_PRIV_KEY_INFO *priv, ASN1_OBJECT *aobj, int version, 146 int ptype, void *pval, unsigned char *penc, int penclen) 147 { 148 unsigned char **ppenc = NULL; 149 150 if (version >= 0) { 151 if (!ASN1_INTEGER_set(priv->version, version)) 152 return 0; 153 } 154 if (penc) { 155 int pmtype; 156 ASN1_OCTET_STRING *oct; 157 oct = ASN1_OCTET_STRING_new(); 158 if (!oct) 159 return 0; 160 oct->data = penc; 161 ppenc = &oct->data; 162 oct->length = penclen; 163 if (priv->broken == PKCS8_NO_OCTET) 164 pmtype = V_ASN1_SEQUENCE; 165 else 166 pmtype = V_ASN1_OCTET_STRING; 167 ASN1_TYPE_set(priv->pkey, pmtype, oct); 168 } 169 if (!X509_ALGOR_set0(priv->pkeyalg, aobj, ptype, pval)) { 170 /* If call fails do not swallow 'enc' */ 171 if (ppenc) 172 *ppenc = NULL; 173 return 0; 174 } 175 return 1; 176 } 177 178 int 179 PKCS8_pkey_get0(ASN1_OBJECT **ppkalg, const unsigned char **pk, int *ppklen, 180 X509_ALGOR **pa, PKCS8_PRIV_KEY_INFO *p8) 181 { 182 if (ppkalg) 183 *ppkalg = p8->pkeyalg->algorithm; 184 if (p8->pkey->type == V_ASN1_OCTET_STRING) { 185 p8->broken = PKCS8_OK; 186 if (pk) { 187 *pk = p8->pkey->value.octet_string->data; 188 *ppklen = p8->pkey->value.octet_string->length; 189 } 190 } else if (p8->pkey->type == V_ASN1_SEQUENCE) { 191 p8->broken = PKCS8_NO_OCTET; 192 if (pk) { 193 *pk = p8->pkey->value.sequence->data; 194 *ppklen = p8->pkey->value.sequence->length; 195 } 196 } else 197 return 0; 198 if (pa) 199 *pa = p8->pkeyalg; 200 return 1; 201 } 202