Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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, |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 156 | 0,0,0,0,0,0, |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 | |