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#include <openssl/evp.h> 57 58#include <openssl/asn1.h> 59#include <openssl/digest.h> 60#include <openssl/mem.h> 61#include <openssl/obj.h> 62 63#include "internal.h" 64 65 66static int hmac_size(const EVP_PKEY *pkey) { return EVP_MAX_MD_SIZE; } 67 68static void hmac_key_free(EVP_PKEY *pkey) { 69 ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr; 70 if (os) { 71 if (os->data) { 72 OPENSSL_cleanse(os->data, os->length); 73 } 74 ASN1_OCTET_STRING_free(os); 75 } 76} 77 78static int hmac_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) { 79 switch (op) { 80 case ASN1_PKEY_CTRL_DEFAULT_MD_NID: 81 *(int *)arg2 = NID_sha1; 82 return 1; 83 84 default: 85 return -2; 86 } 87} 88 89const EVP_PKEY_ASN1_METHOD hmac_asn1_meth = { 90 EVP_PKEY_HMAC, EVP_PKEY_HMAC, 0 /* flags */, 91 "HMAC", "OpenSSL HMAC method", 0 /* pub_decode */, 92 0 /* pub_encode */, 0 /* pub_cmp */, 0 /* pub_print */, 93 0 /*priv_decode */, 0 /* priv_encode */, 0 /* priv_print */, 94 0 /* pkey_opaque */, 95 hmac_size, 0 /* pkey_bits */, 0 /* param_decode */, 96 0 /* param_encode*/, 0 /* param_missing*/, 0 /* param_copy*/, 97 0 /* param_cmp*/, 0 /* param_print*/, 0 /* sig_print*/, 98 hmac_key_free, hmac_pkey_ctrl, 0 /* old_priv_decode */, 99 0 /* old_priv_encode */ 100}; 101