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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 */ | |
57 | |
58 #include <stdio.h> | |
59 #include "cryptlib.h" | |
60 #include <openssl/evp.h> | |
61 #include "asn1_locl.h" | |
62 | |
63 #define HMAC_TEST_PRIVATE_KEY_FORMAT | |
64 | |
65 /* HMAC "ASN1" method. This is just here to indicate the | |
66 * maximum HMAC output length and to free up an HMAC | |
67 * key. | |
68 */ | |
69 | |
70 static int hmac_size(const EVP_PKEY *pkey) | |
71 { | |
72 return EVP_MAX_MD_SIZE; | |
73 } | |
74 | |
75 static void hmac_key_free(EVP_PKEY *pkey) | |
76 { | |
77 ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr; | |
78 if (os) | |
79 { | |
80 if (os->data) | |
81 OPENSSL_cleanse(os->data, os->length); | |
82 ASN1_OCTET_STRING_free(os); | |
83 } | |
84 } | |
85 | |
86 | |
87 static int hmac_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
88 { | |
89 switch (op) | |
90 { | |
91 case ASN1_PKEY_CTRL_DEFAULT_MD_NID: | |
92 *(int *)arg2 = NID_sha1; | |
93 return 1; | |
94 | |
95 default: | |
96 return -2; | |
97 } | |
98 } | |
99 | |
100 #ifdef HMAC_TEST_PRIVATE_KEY_FORMAT | |
101 /* A bogus private key format for test purposes. This is simply the | |
102 * HMAC key with "HMAC PRIVATE KEY" in the headers. When enabled the | |
103 * genpkey utility can be used to "generate" HMAC keys. | |
104 */ | |
105 | |
106 static int old_hmac_decode(EVP_PKEY *pkey, | |
107 const unsigned char **pder, int derlen) | |
108 { | |
109 ASN1_OCTET_STRING *os; | |
110 os = ASN1_OCTET_STRING_new(); | |
111 if (!os || !ASN1_OCTET_STRING_set(os, *pder, derlen)) | |
112 return 0; | |
113 EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, os); | |
114 return 1; | |
115 } | |
116 | |
117 static int old_hmac_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
118 { | |
119 int inc; | |
120 ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr; | |
121 if (pder) | |
122 { | |
123 if (!*pder) | |
124 { | |
125 *pder = OPENSSL_malloc(os->length); | |
126 inc = 0; | |
127 } | |
128 else inc = 1; | |
129 | |
130 memcpy(*pder, os->data, os->length); | |
131 | |
132 if (inc) | |
133 *pder += os->length; | |
134 } | |
135 | |
136 return os->length; | |
137 } | |
138 | |
139 #endif | |
140 | |
141 const EVP_PKEY_ASN1_METHOD hmac_asn1_meth = | |
142 { | |
143 EVP_PKEY_HMAC, | |
144 EVP_PKEY_HMAC, | |
145 0, | |
146 | |
147 "HMAC", | |
148 "OpenSSL HMAC method", | |
149 | |
150 0,0,0,0, | |
151 | |
152 0,0,0, | |
153 | |
154 hmac_size, | |
155 0, | |
156 0,0,0,0,0,0,0, | |
157 | |
158 hmac_key_free, | |
159 hmac_pkey_ctrl, | |
160 #ifdef HMAC_TEST_PRIVATE_KEY_FORMAT | |
161 old_hmac_decode, | |
162 old_hmac_encode | |
163 #else | |
164 0,0 | |
165 #endif | |
166 }; | |
167 | |
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