/src/libressl/crypto/cmac/cm_ameth.c
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1 | | /* $OpenBSD: cm_ameth.c,v 1.11 2024/01/04 17:01:26 tb Exp $ */ |
2 | | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
3 | | * project 2010. |
4 | | */ |
5 | | /* ==================================================================== |
6 | | * Copyright (c) 2010 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 | | |
54 | | #include <stdio.h> |
55 | | |
56 | | #include <openssl/cmac.h> |
57 | | #include <openssl/evp.h> |
58 | | |
59 | | #include "asn1_local.h" |
60 | | #include "evp_local.h" |
61 | | |
62 | | /* CMAC "ASN1" method. This is just here to indicate the |
63 | | * maximum CMAC output length and to free up a CMAC |
64 | | * key. |
65 | | */ |
66 | | |
67 | | static int |
68 | | cmac_size(const EVP_PKEY *pkey) |
69 | 0 | { |
70 | 0 | return EVP_MAX_BLOCK_LENGTH; |
71 | 0 | } |
72 | | |
73 | | static void |
74 | | cmac_key_free(EVP_PKEY *pkey) |
75 | 0 | { |
76 | 0 | CMAC_CTX_free(pkey->pkey.ptr); |
77 | 0 | } |
78 | | |
79 | | const EVP_PKEY_ASN1_METHOD cmac_asn1_meth = { |
80 | | .base_method = &cmac_asn1_meth, |
81 | | .pkey_id = EVP_PKEY_CMAC, |
82 | | |
83 | | .pem_str = "CMAC", |
84 | | .info = "OpenSSL CMAC method", |
85 | | |
86 | | .pkey_size = cmac_size, |
87 | | .pkey_free = cmac_key_free |
88 | | }; |