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