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Diffstat (limited to 'SoftHSMv2/src/lib/crypto/OSSLEVPSymmetricAlgorithm.h')
| -rw-r--r-- | SoftHSMv2/src/lib/crypto/OSSLEVPSymmetricAlgorithm.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/SoftHSMv2/src/lib/crypto/OSSLEVPSymmetricAlgorithm.h b/SoftHSMv2/src/lib/crypto/OSSLEVPSymmetricAlgorithm.h new file mode 100644 index 0000000..66bbeef --- /dev/null +++ b/SoftHSMv2/src/lib/crypto/OSSLEVPSymmetricAlgorithm.h @@ -0,0 +1,81 @@ +/* + * Copyright (c) 2010 SURFnet bv + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER + * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN + * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/***************************************************************************** + OSSLEVPSymmetricAlgorithm.h + + OpenSSL symmetric algorithm implementation + *****************************************************************************/ + +#ifndef _SOFTHSM_V2_OSSLEVPSYMMETRICALGORITHM_H +#define _SOFTHSM_V2_OSSLEVPSYMMETRICALGORITHM_H + +#include <openssl/evp.h> +#include <string> +#include "config.h" +#include "SymmetricKey.h" +#include "SymmetricAlgorithm.h" + +class OSSLEVPSymmetricAlgorithm : public SymmetricAlgorithm +{ +public: + // Constructor + OSSLEVPSymmetricAlgorithm(); + + // Destructor + virtual ~OSSLEVPSymmetricAlgorithm(); + + // Encryption functions + virtual bool encryptInit(const SymmetricKey* key, const SymMode::Type mode = SymMode::CBC, const ByteString& IV = ByteString(), bool padding = true, size_t counterBits = 0, const ByteString& aad = ByteString(), size_t tagBytes = 0); + virtual bool encryptUpdate(const ByteString& data, ByteString& encryptedData); + virtual bool encryptFinal(ByteString& encryptedData); + + // Decryption functions + virtual bool decryptInit(const SymmetricKey* key, const SymMode::Type mode = SymMode::CBC, const ByteString& IV = ByteString(), bool padding = true, size_t counterBits = 0, const ByteString& aad = ByteString(), size_t tagBytes = 0); + virtual bool decryptUpdate(const ByteString& encryptedData, ByteString& data); + virtual bool decryptFinal(ByteString& data); + + // Return the block size + virtual size_t getBlockSize() const = 0; + + // Check if more bytes of data can be encrypted + virtual bool checkMaximumBytes(unsigned long bytes); + +protected: + // Return the right EVP cipher for the operation + virtual const EVP_CIPHER* getCipher() const = 0; + +private: + // The current EVP context + EVP_CIPHER_CTX* pCurCTX; + + // The maximum bytes to encrypt/decrypt + BIGNUM* maximumBytes; + BIGNUM* counterBytes; +}; + +#endif // !_SOFTHSM_V2_OSSLEVPSYMMETRICALGORITHM_H + |