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OpenSSLCryptoHashHMAC.hpp

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00001 /*
00002  * The Apache Software License, Version 1.1
00003  *
00004  * Copyright (c) 2002 Berin Lautenbach.  All rights reserved.
00005  *
00006  * Redistribution and use in source and binary forms, with or without
00007  * modification, are permitted provided that the following conditions
00008  * are met:
00009  *
00010  * 1. Redistributions of source code must retain the above copyright
00011  *    notice, this list of conditions and the following disclaimer.
00012  *
00013  * 2. Redistributions in binary form must reproduce the above copyright
00014  *    notice, this list of conditions and the following disclaimer in
00015  *    the documentation and/or other materials provided with the
00016  *    distribution.
00017  *
00018  * 3. The end-user documentation included with the redistribution,
00019  *    if any, must include the following acknowledgment:
00020  *       "This product includes software developed by
00021  *                   Berin Lautenbach"
00022  *    Alternately, this acknowledgment may appear in the software itself,
00023  *    if and wherever such third-party acknowledgments normally appear.
00024  *
00025  * 4. The names "XSEC", "xml-security-c" and Berin Lautenbach must
00026  *    not be used to endorse or promote products derived from this
00027  *    software without prior written permission. For written
00028  *    permission, please contact berin@users.sourceforge.net.
00029  *
00030  * 5. Products derived from this software may not be called "xml-security-c",
00031  *    nor may "xml-security-c" appear in their name, without prior written
00032  *    permission of Berin Lautenbach.
00033  *
00034  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
00035  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00036  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00037  * DISCLAIMED.  IN NO EVENT SHALL BERIN LAUTENBACH OR OTHER
00038  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00039  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00040  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
00041  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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00044  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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00046  * ====================================================================
00047  */
00048 
00049 /*
00050  * XSEC
00051  *
00052  * OpenSSLCryptoHashHMAC := OpenSSL Implementation of HMAC
00053  *
00054  */
00055 
00056 #ifndef OPENSSLCRYPTOHASHHMAC_INCLUDE
00057 #define OPENSSLCRYPTOHASHHMAC_INCLUDE
00058 
00059 #include <xsec/framework/XSECDefs.hpp>
00060 #include <xsec/enc/XSECCryptoHash.hpp>
00061 #include <xsec/utils/XSECSafeBuffer.hpp>
00062 
00063 // OpenSSL Includes
00064 
00065 #include <openssl/evp.h>
00066 #include <openssl/hmac.h>
00067 
00068 class DSIG_EXPORT OpenSSLCryptoHashHMAC : public XSECCryptoHash {
00069 
00070 
00071 public :
00072 
00073     // Constructors/Destructors
00074     
00075     OpenSSLCryptoHashHMAC(XSECCryptoHash::HashType alg);
00076     virtual ~OpenSSLCryptoHashHMAC();
00077 
00078     // Key activities
00079     virtual void        setKey(XSECCryptoKey * key);
00080 
00081     // Hashing Activities
00082     virtual void        reset(void);                    // Reset the hash
00083     virtual void        hash(unsigned char * data, 
00084                              unsigned int length);      // Hash some data
00085     virtual unsigned int finish(unsigned char * hash,
00086                                 unsigned int maxLength);// Finish and get hash
00087 
00088     // Get information
00089     virtual HashType getHashType(void);
00090 
00091 private:
00092 
00093     // Not implemented constructors
00094     OpenSSLCryptoHashHMAC();
00095 
00096     const EVP_MD        * mp_md;                        // Digest instance
00097     unsigned char       m_mdValue[EVP_MAX_MD_SIZE];     // Final output
00098     unsigned int        m_mdLen;                        // Length of digest
00099     HashType            m_hashType;                     // What type of hash is this?
00100     HMAC_CTX            m_hctx;                         // Context for HMAC
00101     safeBuffer          m_keyBuf;                       // The loaded key
00102     unsigned int        m_keyLen;                       // The loaded key length
00103     bool                m_initialised;
00104 
00105 };
00106 
00107 #endif /* OPENSSLCRYPTOHASHHMAC_INCLUDE */

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