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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, |
| 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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