CryptoImpl.h

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/*
* Copyright 2010-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
*  http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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 limitations under the License.
*/

#pragma once

#include <aws/core/utils/crypto/Hash.h>
#include <aws/core/utils/crypto/HMAC.h>
#include <aws/core/utils/crypto/SecureRandom.h>
#include <aws/core/utils/crypto/Cipher.h>

struct _CCCryptor;

namespace Aws
{
    namespace Utils
    {
        namespace Crypto
        {
            class SecureRandomBytes_CommonCrypto : public SecureRandomBytes
            {
             public:
                SecureRandomBytes_CommonCrypto();
                ~SecureRandomBytes_CommonCrypto();
                void GetBytes(unsigned char* buffer, size_t bufferSize) override;

            private:
                FILE* fp;
            };


            class MD5CommonCryptoImpl : public Hash
            {
            public:

                MD5CommonCryptoImpl() {}
                virtual ~MD5CommonCryptoImpl() {}

                virtual HashResult Calculate(const Aws::String& str) override;

                virtual HashResult Calculate(Aws::IStream& stream) override;

            };

            class Sha256CommonCryptoImpl : public Hash
            {
            public:

                Sha256CommonCryptoImpl() {}
                virtual ~Sha256CommonCryptoImpl() {}

                virtual HashResult Calculate(const Aws::String& str) override;

                virtual HashResult Calculate(Aws::IStream& stream) override;
            };

            class Sha256HMACCommonCryptoImpl : public HMAC
            {
            public:

                Sha256HMACCommonCryptoImpl() {}
                virtual ~Sha256HMACCommonCryptoImpl() {}

                virtual HashResult Calculate(const ByteBuffer& toSign, const ByteBuffer& secret) override;


            };

            class CommonCryptoCipher : public SymmetricCipher
            {
            public:
                CommonCryptoCipher(const CryptoBuffer& key, size_t ivSize, bool ctrMode = false);

                CommonCryptoCipher(CryptoBuffer&& key, CryptoBuffer&& initializationVector,
                              CryptoBuffer&& tag = CryptoBuffer(0));

                CommonCryptoCipher(const CryptoBuffer& key, const CryptoBuffer& initializationVector,
                              const CryptoBuffer& tag = CryptoBuffer(0));

                CommonCryptoCipher(const CommonCryptoCipher& other) = delete;

                CommonCryptoCipher& operator=(const CommonCryptoCipher& other) = delete;

                CommonCryptoCipher(CommonCryptoCipher&& toMove);

                CommonCryptoCipher& operator=(CommonCryptoCipher&& toMove) = default;


                virtual ~CommonCryptoCipher();

                CryptoBuffer EncryptBuffer(const CryptoBuffer& unEncryptedData) override;

                CryptoBuffer FinalizeEncryption() override;

                CryptoBuffer DecryptBuffer(const CryptoBuffer& encryptedData) override;

                CryptoBuffer FinalizeDecryption() override;

                void Reset() override;

            protected:
                virtual void InitEncryptor_Internal() = 0;

                virtual void InitDecryptor_Internal() = 0;

                virtual size_t GetBlockSizeBytes() const = 0;

                virtual size_t GetKeyLengthBits() const = 0;

                _CCCryptor* m_cryptoHandle;

            private:
                void Init();

                void CheckInitEncryptor();

                void CheckInitDecryptor();

                bool m_encDecInitialized;
                bool m_encryptionMode;
                bool m_decryptionMode;
            };

            class AES_CBC_Cipher_CommonCrypto : public CommonCryptoCipher
            {
            public:
                AES_CBC_Cipher_CommonCrypto(const CryptoBuffer& key);

                AES_CBC_Cipher_CommonCrypto(CryptoBuffer&& key, CryptoBuffer&& initializationVector);

                AES_CBC_Cipher_CommonCrypto(const CryptoBuffer& key, const CryptoBuffer& initializationVector);

                AES_CBC_Cipher_CommonCrypto(const AES_CBC_Cipher_CommonCrypto& other) = delete;

                AES_CBC_Cipher_CommonCrypto& operator=(const AES_CBC_Cipher_CommonCrypto& other) = delete;

                AES_CBC_Cipher_CommonCrypto(AES_CBC_Cipher_CommonCrypto&& toMove) = default;

            protected:
                void InitEncryptor_Internal() override;

                void InitDecryptor_Internal() override;

                size_t GetBlockSizeBytes() const override;

                size_t GetKeyLengthBits() const override;

            private:
                static size_t BlockSizeBytes;
                static size_t KeyLengthBits;
            };

            class AES_CTR_Cipher_CommonCrypto : public CommonCryptoCipher
            {
            public:
                AES_CTR_Cipher_CommonCrypto(const CryptoBuffer& key);

                AES_CTR_Cipher_CommonCrypto(CryptoBuffer&& key, CryptoBuffer&& initializationVector);

                AES_CTR_Cipher_CommonCrypto(const CryptoBuffer& key, const CryptoBuffer& initializationVector);

                AES_CTR_Cipher_CommonCrypto(const AES_CTR_Cipher_CommonCrypto& other) = delete;

                AES_CTR_Cipher_CommonCrypto& operator=(const AES_CTR_Cipher_CommonCrypto& other) = delete;

                AES_CTR_Cipher_CommonCrypto(AES_CTR_Cipher_CommonCrypto&& toMove) = default;

            protected:
                void InitEncryptor_Internal() override;

                void InitDecryptor_Internal() override;

                size_t GetBlockSizeBytes() const override;

                size_t GetKeyLengthBits() const override;

            private:
                static size_t BlockSizeBytes;
                static size_t KeyLengthBits;
            };

        } // namespace Crypto
    } // namespace Utils
} // namespace Aws