| /* |
| * Copyright 2002-2004 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * imitations under the License. |
| */ |
| |
| /* |
| * XSEC |
| * |
| * OpenSSLCryptoHashHMAC := OpenSSL Implementation of HMAC |
| * |
| * Author(s): Berin Lautenbach |
| * |
| * $Id$ |
| * |
| */ |
| |
| #include <xsec/framework/XSECDefs.hpp> |
| #if defined (HAVE_OPENSSL) |
| |
| |
| #include <xsec/enc/OpenSSL/OpenSSLCryptoHashHMAC.hpp> |
| #include <xsec/enc/XSECCryptoException.hpp> |
| #include <xsec/enc/XSECCryptoKeyHMAC.hpp> |
| |
| #include <memory.h> |
| |
| // Constructors/Destructors |
| |
| OpenSSLCryptoHashHMAC::OpenSSLCryptoHashHMAC(HashType alg) { |
| |
| // Initialise the digest |
| |
| switch (alg) { |
| |
| case (XSECCryptoHash::HASH_SHA1) : |
| |
| mp_md = EVP_get_digestbyname("SHA1"); |
| break; |
| |
| case (XSECCryptoHash::HASH_MD5) : |
| |
| mp_md = EVP_get_digestbyname("MD5"); |
| break; |
| |
| default : |
| |
| mp_md = NULL; |
| |
| } |
| |
| if(!mp_md) { |
| |
| throw XSECCryptoException(XSECCryptoException::MDError, |
| "OpenSSL:HashHMAC - Error loading Message Digest"); |
| } |
| |
| m_initialised = false; |
| m_hashType = alg; |
| |
| } |
| |
| void OpenSSLCryptoHashHMAC::setKey(XSECCryptoKey *key) { |
| |
| // Use this to initialise the HMAC Context |
| |
| if (key->getKeyType() != XSECCryptoKey::KEY_HMAC) { |
| |
| throw XSECCryptoException(XSECCryptoException::MDError, |
| "OpenSSL:HashHMAC - Non HMAC Key passed to OpenSSLHashHMAC"); |
| |
| } |
| |
| m_keyLen = ((XSECCryptoKeyHMAC *) key)->getKey(m_keyBuf); |
| |
| |
| HMAC_Init(&m_hctx, |
| m_keyBuf.rawBuffer(), |
| m_keyLen, |
| mp_md); |
| |
| m_initialised = true; |
| |
| } |
| |
| OpenSSLCryptoHashHMAC::~OpenSSLCryptoHashHMAC() {} |
| |
| |
| |
| // Hashing Activities |
| |
| void OpenSSLCryptoHashHMAC::reset(void) { |
| |
| |
| if (m_initialised) |
| HMAC_Init(&m_hctx, |
| m_keyBuf.rawBuffer(), |
| m_keyLen, |
| mp_md); |
| |
| } |
| |
| void OpenSSLCryptoHashHMAC::hash(unsigned char * data, |
| unsigned int length) { |
| |
| if (!m_initialised) |
| throw XSECCryptoException(XSECCryptoException::MDError, |
| "OpenSSL:HashHMAC - hash called prior to setKey"); |
| |
| |
| HMAC_Update(&m_hctx, data, (int) length); |
| |
| } |
| |
| unsigned int OpenSSLCryptoHashHMAC::finish(unsigned char * hash, |
| unsigned int maxLength) { |
| |
| unsigned int retLen; |
| |
| // Finish up and copy out hash, returning the length |
| |
| HMAC_Final(&m_hctx, m_mdValue, &m_mdLen); |
| |
| // Copy to output buffer |
| |
| retLen = (maxLength > m_mdLen ? m_mdLen : maxLength); |
| memcpy(hash, m_mdValue, retLen); |
| |
| return retLen; |
| |
| } |
| |
| // Get information |
| |
| XSECCryptoHash::HashType OpenSSLCryptoHashHMAC::getHashType(void) { |
| |
| return m_hashType; // This could be any kind of hash |
| |
| } |
| |
| #endif /* HAVE_OPENSSL */ |