1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
2 * project 2007.
3 */
4 /* ====================================================================
5 * Copyright (c) 2007 The OpenSSL Project. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * 3. All advertising materials mentioning features or use of this
20 * software must display the following acknowledgment:
21 * "This product includes software developed by the OpenSSL Project
22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
23 *
24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
25 * endorse or promote products derived from this software without
26 * prior written permission. For written permission, please contact
27 * licensing@OpenSSL.org.
28 *
29 * 5. Products derived from this software may not be called "OpenSSL"
30 * nor may "OpenSSL" appear in their names without prior written
31 * permission of the OpenSSL Project.
32 *
33 * 6. Redistributions of any form whatsoever must retain the following
34 * acknowledgment:
35 * "This product includes software developed by the OpenSSL Project
36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
37 *
38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
49 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * ====================================================================
51 *
52 * This product includes cryptographic software written by Eric Young
53 * (eay@cryptsoft.com). This product includes software written by Tim
54 * Hudson (tjh@cryptsoft.com). */
55
56 #include <openssl/evp.h>
57
58 #include <openssl/asn1.h>
59 #include <openssl/digest.h>
60 #include <openssl/mem.h>
61 #include <openssl/obj.h>
62
63 #include "internal.h"
64
65
hmac_size(const EVP_PKEY * pkey)66 static int hmac_size(const EVP_PKEY *pkey) { return EVP_MAX_MD_SIZE; }
67
hmac_key_free(EVP_PKEY * pkey)68 static void hmac_key_free(EVP_PKEY *pkey) {
69 ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr;
70 if (os) {
71 if (os->data) {
72 OPENSSL_cleanse(os->data, os->length);
73 }
74 ASN1_OCTET_STRING_free(os);
75 }
76 }
77
78 const EVP_PKEY_ASN1_METHOD hmac_asn1_meth = {
79 EVP_PKEY_HMAC, EVP_PKEY_HMAC, 0 /* flags */,
80 "HMAC", "OpenSSL HMAC method", 0 /* pub_decode */,
81 0 /* pub_encode */, 0 /* pub_cmp */, 0 /* pub_print */,
82 0 /*priv_decode */, 0 /* priv_encode */, 0 /* priv_print */,
83 0 /* pkey_opaque */, 0 /* pkey_supports_digest */,
84 hmac_size, 0 /* pkey_bits */, 0 /* param_decode */,
85 0 /* param_encode*/, 0 /* param_missing*/, 0 /* param_copy*/,
86 0 /* param_cmp*/, 0 /* param_print*/, 0 /* sig_print*/,
87 hmac_key_free, 0 /* old_priv_decode */,
88 0 /* old_priv_encode */
89 };
90