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0f113f3e MC |
1 | /* |
2 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project | |
3 | * 2007. | |
74633553 DSH |
4 | */ |
5 | /* ==================================================================== | |
6 | * Copyright (c) 2007 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 | |
0f113f3e | 13 | * notice, this list of conditions and the following disclaimer. |
74633553 DSH |
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> | |
b39fc560 | 60 | #include "internal/cryptlib.h" |
74633553 | 61 | #include <openssl/evp.h> |
5fe736e5 | 62 | #include "internal/asn1_int.h" |
74633553 DSH |
63 | |
64 | #define HMAC_TEST_PRIVATE_KEY_FORMAT | |
65 | ||
0f113f3e MC |
66 | /* |
67 | * HMAC "ASN1" method. This is just here to indicate the maximum HMAC output | |
68 | * length and to free up an HMAC key. | |
74633553 DSH |
69 | */ |
70 | ||
71 | static int hmac_size(const EVP_PKEY *pkey) | |
0f113f3e MC |
72 | { |
73 | return EVP_MAX_MD_SIZE; | |
74 | } | |
74633553 DSH |
75 | |
76 | static void hmac_key_free(EVP_PKEY *pkey) | |
0f113f3e MC |
77 | { |
78 | ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr; | |
79 | if (os) { | |
80 | if (os->data) | |
81 | OPENSSL_cleanse(os->data, os->length); | |
82 | ASN1_OCTET_STRING_free(os); | |
83 | } | |
84 | } | |
74633553 | 85 | |
e69adea5 | 86 | static int hmac_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) |
0f113f3e MC |
87 | { |
88 | switch (op) { | |
89 | case ASN1_PKEY_CTRL_DEFAULT_MD_NID: | |
90 | *(int *)arg2 = NID_sha256; | |
91 | return 1; | |
92 | ||
93 | default: | |
94 | return -2; | |
95 | } | |
96 | } | |
e69adea5 | 97 | |
74633553 | 98 | #ifdef HMAC_TEST_PRIVATE_KEY_FORMAT |
0f113f3e MC |
99 | /* |
100 | * A bogus private key format for test purposes. This is simply the HMAC key | |
101 | * with "HMAC PRIVATE KEY" in the headers. When enabled the genpkey utility | |
102 | * can be used to "generate" HMAC keys. | |
74633553 DSH |
103 | */ |
104 | ||
105 | static int old_hmac_decode(EVP_PKEY *pkey, | |
0f113f3e MC |
106 | const unsigned char **pder, int derlen) |
107 | { | |
108 | ASN1_OCTET_STRING *os; | |
109 | os = ASN1_OCTET_STRING_new(); | |
110 | if (!os || !ASN1_OCTET_STRING_set(os, *pder, derlen)) | |
3f6c7691 AG |
111 | goto err; |
112 | if (!EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, os)) | |
113 | goto err; | |
0f113f3e | 114 | return 1; |
3f6c7691 AG |
115 | |
116 | err: | |
117 | ASN1_OCTET_STRING_free(os); | |
118 | return 0; | |
0f113f3e | 119 | } |
74633553 DSH |
120 | |
121 | static int old_hmac_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
122 | { |
123 | int inc; | |
124 | ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr; | |
125 | if (pder) { | |
126 | if (!*pder) { | |
127 | *pder = OPENSSL_malloc(os->length); | |
128 | if (*pder == NULL) | |
129 | return -1; | |
130 | inc = 0; | |
131 | } else | |
132 | inc = 1; | |
133 | ||
134 | memcpy(*pder, os->data, os->length); | |
135 | ||
136 | if (inc) | |
137 | *pder += os->length; | |
138 | } | |
139 | ||
140 | return os->length; | |
141 | } | |
74633553 DSH |
142 | |
143 | #endif | |
144 | ||
0f113f3e MC |
145 | const EVP_PKEY_ASN1_METHOD hmac_asn1_meth = { |
146 | EVP_PKEY_HMAC, | |
147 | EVP_PKEY_HMAC, | |
148 | 0, | |
74633553 | 149 | |
0f113f3e MC |
150 | "HMAC", |
151 | "OpenSSL HMAC method", | |
74633553 | 152 | |
0f113f3e | 153 | 0, 0, 0, 0, |
74633553 | 154 | |
0f113f3e | 155 | 0, 0, 0, |
74633553 | 156 | |
0f113f3e MC |
157 | hmac_size, |
158 | 0, 0, | |
159 | 0, 0, 0, 0, 0, 0, 0, | |
74633553 | 160 | |
0f113f3e MC |
161 | hmac_key_free, |
162 | hmac_pkey_ctrl, | |
74633553 | 163 | #ifdef HMAC_TEST_PRIVATE_KEY_FORMAT |
0f113f3e MC |
164 | old_hmac_decode, |
165 | old_hmac_encode | |
74633553 | 166 | #else |
0f113f3e | 167 | 0, 0 |
74633553 | 168 | #endif |
0f113f3e | 169 | }; |