Initial revision

1 files changed, 104 insertions, 0 deletions

diff --git a/default.h b/default.h
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+++ b/default.h
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+#ifndef CRYPTOPP_DEFAULT_H
+#define CRYPTOPP_DEFAULT_H
+
+#include "sha.h"
+#include "hmac.h"
+#include "des.h"
+#include "filters.h"
+#include "modes.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+typedef DES_EDE2 Default_BlockCipher;
+typedef SHA DefaultHashModule;
+typedef HMAC<DefaultHashModule> DefaultMAC;
+
+//! Password-Based Encryptor using DES-EDE2
+class DefaultEncryptor : public ProxyFilter
+{
+public:
+	DefaultEncryptor(const char *passphrase, BufferedTransformation *attachment = NULL);
+	DefaultEncryptor(const byte *passphrase, unsigned int passphraseLength, BufferedTransformation *attachment = NULL);
+
+protected:
+	void FirstPut(const byte *);
+	void LastPut(const byte *inString, unsigned int length);
+
+private:
+	SecByteBlock m_passphrase;
+	CBC_Mode<Default_BlockCipher>::Encryption m_cipher;
+};
+
+//! Password-Based Decryptor using DES-EDE2
+class DefaultDecryptor : public ProxyFilter
+{
+public:
+	DefaultDecryptor(const char *passphrase, BufferedTransformation *attachment = NULL, bool throwException=true);
+	DefaultDecryptor(const byte *passphrase, unsigned int passphraseLength, BufferedTransformation *attachment = NULL, bool throwException=true);
+
+	class Err : public Exception
+	{
+	public:
+		Err(const std::string &s) 
+			: Exception(DATA_INTEGRITY_CHECK_FAILED, s) {}
+	};
+	class KeyBadErr : public Err {public: KeyBadErr() : Err("DefaultDecryptor: cannot decrypt message with this passphrase") {}};
+
+	enum State {WAITING_FOR_KEYCHECK, KEY_GOOD, KEY_BAD};
+	State CurrentState() const {return m_state;}
+
+protected:
+	void FirstPut(const byte *inString);
+	void LastPut(const byte *inString, unsigned int length);
+
+	State m_state;
+
+private:
+	void CheckKey(const byte *salt, const byte *keyCheck);
+
+	SecByteBlock m_passphrase;
+	CBC_Mode<Default_BlockCipher>::Decryption m_cipher;
+	member_ptr<FilterWithBufferedInput> m_decryptor;
+	bool m_throwException;
+};
+
+//! Password-Based Encryptor using DES-EDE2 and HMAC/SHA-1
+class DefaultEncryptorWithMAC : public ProxyFilter
+{
+public:
+	DefaultEncryptorWithMAC(const char *passphrase, BufferedTransformation *attachment = NULL);
+	DefaultEncryptorWithMAC(const byte *passphrase, unsigned int passphraseLength, BufferedTransformation *attachment = NULL);
+
+protected:
+	void FirstPut(const byte *inString) {}
+	void LastPut(const byte *inString, unsigned int length);
+
+private:
+	member_ptr<DefaultMAC> m_mac;
+};
+
+//! Password-Based Decryptor using DES-EDE2 and HMAC/SHA-1
+class DefaultDecryptorWithMAC : public ProxyFilter
+{
+public:
+	class MACBadErr : public DefaultDecryptor::Err {public: MACBadErr() : DefaultDecryptor::Err("DefaultDecryptorWithMAC: MAC check failed") {}};
+
+	DefaultDecryptorWithMAC(const char *passphrase, BufferedTransformation *attachment = NULL, bool throwException=true);
+	DefaultDecryptorWithMAC(const byte *passphrase, unsigned int passphraseLength, BufferedTransformation *attachment = NULL, bool throwException=true);
+
+	DefaultDecryptor::State CurrentState() const;
+	bool CheckLastMAC() const;
+
+protected:
+	void FirstPut(const byte *inString) {}
+	void LastPut(const byte *inString, unsigned int length);
+
+private:
+	member_ptr<DefaultMAC> m_mac;
+	HashVerifier *m_hashVerifier;
+	bool m_throwException;
+};
+
+NAMESPACE_END
+
+#endif