65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
#ifndef __CIPHER_H__
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#define __CIPHER_H__
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#ifdef _IMPROVED_PACKET_ENCRYPTION_
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#pragma warning(push)
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#pragma warning(disable: 4100 4127 4189 4231 4512 4706)
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#include <cryptopp/cryptlib.h>
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#pragma warning(pop)
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// Forward declaration
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class KeyAgreement;
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//THEMIDA
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// Communication channel encryption handler.
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class Cipher {
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public:
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explicit Cipher();
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~Cipher();
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void CleanUp();
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// Returns agreed value length in bytes, or zero on failure.
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size_t Prepare(void* buffer, size_t* length);
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// Try to activate cipher algorithm with agreement data received from peer.
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bool Activate(bool polarity, size_t agreed_length,
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const void* buffer, size_t length);
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// Encrypts the given block of data. (no padding required)
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void Encrypt(void* buffer, size_t length) {
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assert(activated_);
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if (!activated_) {
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return;
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}
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encoder_->ProcessData((CryptoPP::byte*)buffer, (const CryptoPP::byte*)buffer, length);
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}
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// Decrypts the given block of data. (no padding required)
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void Decrypt(void* buffer, size_t length) {
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assert(activated_);
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if (!activated_) {
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return;
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}
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decoder_->ProcessData((CryptoPP::byte*)buffer, (const CryptoPP::byte*)buffer, length);
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}
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bool activated() const { return activated_; }
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void set_activated(bool value) { activated_ = value; }
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private:
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bool SetUp(bool polarity);
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bool activated_;
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CryptoPP::SymmetricCipher* encoder_;
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CryptoPP::SymmetricCipher* decoder_;
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KeyAgreement* key_agreement_;
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};
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#endif // _IMPROVED_PACKET_ENCRYPTION_
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#endif // __CIPHER_H__
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//martysama0134's 2e58d0b8baeb072acdf3afc4a5d1999f
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