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167 lines
4.8 KiB
167 lines
4.8 KiB
/* |
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* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project |
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* 2007. |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 2007 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* licensing@OpenSSL.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). |
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* |
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*/ |
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#include <stdio.h> |
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#include "cryptlib.h" |
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#include <openssl/evp.h> |
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#include "asn1_locl.h" |
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#define HMAC_TEST_PRIVATE_KEY_FORMAT |
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/* |
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* HMAC "ASN1" method. This is just here to indicate the maximum HMAC output |
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* length and to free up an HMAC key. |
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*/ |
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static int hmac_size(const EVP_PKEY *pkey) |
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{ |
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return EVP_MAX_MD_SIZE; |
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} |
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static void hmac_key_free(EVP_PKEY *pkey) |
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{ |
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ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr; |
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if (os) { |
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if (os->data) |
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OPENSSL_cleanse(os->data, os->length); |
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ASN1_OCTET_STRING_free(os); |
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} |
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} |
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static int hmac_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) |
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{ |
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switch (op) { |
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case ASN1_PKEY_CTRL_DEFAULT_MD_NID: |
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*(int *)arg2 = NID_sha1; |
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return 1; |
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default: |
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return -2; |
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} |
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} |
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#ifdef HMAC_TEST_PRIVATE_KEY_FORMAT |
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/* |
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* A bogus private key format for test purposes. This is simply the HMAC key |
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* with "HMAC PRIVATE KEY" in the headers. When enabled the genpkey utility |
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* can be used to "generate" HMAC keys. |
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*/ |
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static int old_hmac_decode(EVP_PKEY *pkey, |
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const unsigned char **pder, int derlen) |
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{ |
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ASN1_OCTET_STRING *os; |
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os = ASN1_OCTET_STRING_new(); |
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if (!os || !ASN1_OCTET_STRING_set(os, *pder, derlen)) |
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goto err; |
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if (!EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, os)) |
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goto err; |
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return 1; |
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err: |
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ASN1_OCTET_STRING_free(os); |
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return 0; |
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} |
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static int old_hmac_encode(const EVP_PKEY *pkey, unsigned char **pder) |
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{ |
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int inc; |
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ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr; |
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if (pder) { |
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if (!*pder) { |
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*pder = OPENSSL_malloc(os->length); |
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inc = 0; |
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} else |
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inc = 1; |
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memcpy(*pder, os->data, os->length); |
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if (inc) |
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*pder += os->length; |
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} |
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return os->length; |
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} |
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#endif |
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const EVP_PKEY_ASN1_METHOD hmac_asn1_meth = { |
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EVP_PKEY_HMAC, |
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EVP_PKEY_HMAC, |
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0, |
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"HMAC", |
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"OpenSSL HMAC method", |
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0, 0, 0, 0, |
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0, 0, 0, |
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hmac_size, |
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0, |
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0, 0, 0, 0, 0, 0, 0, |
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hmac_key_free, |
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hmac_pkey_ctrl, |
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#ifdef HMAC_TEST_PRIVATE_KEY_FORMAT |
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old_hmac_decode, |
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old_hmac_encode |
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#else |
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0, 0 |
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#endif |
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};
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