1 /* $OpenBSD: hm_ameth.c,v 1.10 2015/09/10 15:56:25 jsing Exp $ */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2007 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
62 #include <openssl/evp.h>
64 #include "asn1_locl.h"
66 #define HMAC_TEST_PRIVATE_KEY_FORMAT
68 /* HMAC "ASN1" method. This is just here to indicate the
69 * maximum HMAC output length and to free up an HMAC
74 hmac_size(const EVP_PKEY *pkey)
76 return EVP_MAX_MD_SIZE;
80 hmac_key_free(EVP_PKEY *pkey)
82 ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr;
86 explicit_bzero(os->data, os->length);
87 ASN1_OCTET_STRING_free(os);
92 hmac_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
95 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
96 *(int *)arg2 = NID_sha1;
103 #ifdef HMAC_TEST_PRIVATE_KEY_FORMAT
104 /* A bogus private key format for test purposes. This is simply the
105 * HMAC key with "HMAC PRIVATE KEY" in the headers. When enabled the
106 * genpkey utility can be used to "generate" HMAC keys.
110 old_hmac_decode(EVP_PKEY *pkey, const unsigned char **pder, int derlen)
112 ASN1_OCTET_STRING *os;
114 os = ASN1_OCTET_STRING_new();
117 if (ASN1_OCTET_STRING_set(os, *pder, derlen) == 0)
119 if (EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, os) == 0)
124 ASN1_OCTET_STRING_free(os);
129 old_hmac_encode(const EVP_PKEY *pkey, unsigned char **pder)
132 ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr;
136 *pder = malloc(os->length);
143 memcpy(*pder, os->data, os->length);
154 const EVP_PKEY_ASN1_METHOD hmac_asn1_meth = {
155 .pkey_id = EVP_PKEY_HMAC,
156 .pkey_base_id = EVP_PKEY_HMAC,
159 .info = "OpenSSL HMAC method",
161 .pkey_size = hmac_size,
163 .pkey_free = hmac_key_free,
164 .pkey_ctrl = hmac_pkey_ctrl,
165 #ifdef HMAC_TEST_PRIVATE_KEY_FORMAT
166 .old_priv_decode = old_hmac_decode,
167 .old_priv_encode = old_hmac_encode