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Diffstat (limited to 'CryptoPP/cryptlib.h')
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diff --git a/CryptoPP/cryptlib.h b/CryptoPP/cryptlib.h deleted file mode 100644 index 406872232..000000000 --- a/CryptoPP/cryptlib.h +++ /dev/null @@ -1,1655 +0,0 @@ -// cryptlib.h - written and placed in the public domain by Wei Dai -/*! \file - This file contains the declarations for the abstract base - classes that provide a uniform interface to this library. -*/ - -/*! \mainpage Crypto++ Library 5.6.2 API Reference -<dl> -<dt>Abstract Base Classes<dd> - cryptlib.h -<dt>Authenticated Encryption<dd> - AuthenticatedSymmetricCipherDocumentation -<dt>Symmetric Ciphers<dd> - SymmetricCipherDocumentation -<dt>Hash Functions<dd> - SHA1, SHA224, SHA256, SHA384, SHA512, Tiger, Whirlpool, RIPEMD160, RIPEMD320, RIPEMD128, RIPEMD256, Weak1::MD2, Weak1::MD4, Weak1::MD5 -<dt>Non-Cryptographic Checksums<dd> - CRC32, Adler32 -<dt>Message Authentication Codes<dd> - VMAC, HMAC, CBC_MAC, CMAC, DMAC, TTMAC, GCM (GMAC) -<dt>Random Number Generators<dd> - NullRNG(), LC_RNG, RandomPool, BlockingRng, NonblockingRng, AutoSeededRandomPool, AutoSeededX917RNG, #DefaultAutoSeededRNG -<dt>Password-based Cryptography<dd> - PasswordBasedKeyDerivationFunction -<dt>Public Key Cryptosystems<dd> - DLIES, ECIES, LUCES, RSAES, RabinES, LUC_IES -<dt>Public Key Signature Schemes<dd> - DSA2, GDSA, ECDSA, NR, ECNR, LUCSS, RSASS, RSASS_ISO, RabinSS, RWSS, ESIGN -<dt>Key Agreement<dd> - #DH, DH2, #MQV, ECDH, ECMQV, XTR_DH -<dt>Algebraic Structures<dd> - Integer, PolynomialMod2, PolynomialOver, RingOfPolynomialsOver, - ModularArithmetic, MontgomeryRepresentation, GFP2_ONB, - GF2NP, GF256, GF2_32, EC2N, ECP -<dt>Secret Sharing and Information Dispersal<dd> - SecretSharing, SecretRecovery, InformationDispersal, InformationRecovery -<dt>Compression<dd> - Deflator, Inflator, Gzip, Gunzip, ZlibCompressor, ZlibDecompressor -<dt>Input Source Classes<dd> - StringSource, #ArraySource, FileSource, SocketSource, WindowsPipeSource, RandomNumberSource -<dt>Output Sink Classes<dd> - StringSinkTemplate, ArraySink, FileSink, SocketSink, WindowsPipeSink, RandomNumberSink -<dt>Filter Wrappers<dd> - StreamTransformationFilter, HashFilter, HashVerificationFilter, SignerFilter, SignatureVerificationFilter -<dt>Binary to Text Encoders and Decoders<dd> - HexEncoder, HexDecoder, Base64Encoder, Base64Decoder, Base32Encoder, Base32Decoder -<dt>Wrappers for OS features<dd> - Timer, Socket, WindowsHandle, ThreadLocalStorage, ThreadUserTimer -<dt>FIPS 140 related<dd> - fips140.h -</dl> - -In the DLL version of Crypto++, only the following implementation class are available. -<dl> -<dt>Block Ciphers<dd> - AES, DES_EDE2, DES_EDE3, SKIPJACK -<dt>Cipher Modes (replace template parameter BC with one of the block ciphers above)<dd> - ECB_Mode\<BC\>, CTR_Mode\<BC\>, CBC_Mode\<BC\>, CFB_FIPS_Mode\<BC\>, OFB_Mode\<BC\>, GCM\<AES\> -<dt>Hash Functions<dd> - SHA1, SHA224, SHA256, SHA384, SHA512 -<dt>Public Key Signature Schemes (replace template parameter H with one of the hash functions above)<dd> - RSASS\<PKCS1v15, H\>, RSASS\<PSS, H\>, RSASS_ISO\<H\>, RWSS\<P1363_EMSA2, H\>, DSA, ECDSA\<ECP, H\>, ECDSA\<EC2N, H\> -<dt>Message Authentication Codes (replace template parameter H with one of the hash functions above)<dd> - HMAC\<H\>, CBC_MAC\<DES_EDE2\>, CBC_MAC\<DES_EDE3\>, GCM\<AES\> -<dt>Random Number Generators<dd> - #DefaultAutoSeededRNG (AutoSeededX917RNG\<AES\>) -<dt>Key Agreement<dd> - #DH -<dt>Public Key Cryptosystems<dd> - RSAES\<OAEP\<SHA1\> \> -</dl> - -<p>This reference manual is a work in progress. Some classes are still lacking detailed descriptions. -<p>Click <a href="CryptoPPRef.zip">here</a> to download a zip archive containing this manual. -<p>Thanks to Ryan Phillips for providing the Doxygen configuration file -and getting me started with this manual. -*/ - -#ifndef CRYPTOPP_CRYPTLIB_H -#define CRYPTOPP_CRYPTLIB_H - -#include "config.h" -#include "stdcpp.h" - -NAMESPACE_BEGIN(CryptoPP) - -// forward declarations -class Integer; -class RandomNumberGenerator; -class BufferedTransformation; - -//! used to specify a direction for a cipher to operate in (encrypt or decrypt) -enum CipherDir {ENCRYPTION, DECRYPTION}; - -//! used to represent infinite time -const unsigned long INFINITE_TIME = ULONG_MAX; - -// VC60 workaround: using enums as template parameters causes problems -template <typename ENUM_TYPE, int VALUE> -struct EnumToType -{ - static ENUM_TYPE ToEnum() {return (ENUM_TYPE)VALUE;} -}; - -enum ByteOrder {LITTLE_ENDIAN_ORDER = 0, BIG_ENDIAN_ORDER = 1}; -typedef EnumToType<ByteOrder, LITTLE_ENDIAN_ORDER> LittleEndian; -typedef EnumToType<ByteOrder, BIG_ENDIAN_ORDER> BigEndian; - -//! base class for all exceptions thrown by Crypto++ -class CRYPTOPP_DLL Exception : public std::exception -{ -public: - //! error types - enum ErrorType { - //! a method is not implemented - NOT_IMPLEMENTED, - //! invalid function argument - INVALID_ARGUMENT, - //! BufferedTransformation received a Flush(true) signal but can't flush buffers - CANNOT_FLUSH, - //! data integerity check (such as CRC or MAC) failed - DATA_INTEGRITY_CHECK_FAILED, - //! received input data that doesn't conform to expected format - INVALID_DATA_FORMAT, - //! error reading from input device or writing to output device - IO_ERROR, - //! some error not belong to any of the above categories - OTHER_ERROR - }; - - explicit Exception(ErrorType errorType, const std::string &s) : m_errorType(errorType), m_what(s) {} - virtual ~Exception() throw() {} - const char *what() const throw() {return (m_what.c_str());} - const std::string &GetWhat() const {return m_what;} - void SetWhat(const std::string &s) {m_what = s;} - ErrorType GetErrorType() const {return m_errorType;} - void SetErrorType(ErrorType errorType) {m_errorType = errorType;} - -private: - ErrorType m_errorType; - std::string m_what; -}; - -//! exception thrown when an invalid argument is detected -class CRYPTOPP_DLL InvalidArgument : public Exception -{ -public: - explicit InvalidArgument(const std::string &s) : Exception(INVALID_ARGUMENT, s) {} -}; - -//! exception thrown when input data is received that doesn't conform to expected format -class CRYPTOPP_DLL InvalidDataFormat : public Exception -{ -public: - explicit InvalidDataFormat(const std::string &s) : Exception(INVALID_DATA_FORMAT, s) {} -}; - -//! exception thrown by decryption filters when trying to decrypt an invalid ciphertext -class CRYPTOPP_DLL InvalidCiphertext : public InvalidDataFormat -{ -public: - explicit InvalidCiphertext(const std::string &s) : InvalidDataFormat(s) {} -}; - -//! exception thrown by a class if a non-implemented method is called -class CRYPTOPP_DLL NotImplemented : public Exception -{ -public: - explicit NotImplemented(const std::string &s) : Exception(NOT_IMPLEMENTED, s) {} -}; - -//! exception thrown by a class when Flush(true) is called but it can't completely flush its buffers -class CRYPTOPP_DLL CannotFlush : public Exception -{ -public: - explicit CannotFlush(const std::string &s) : Exception(CANNOT_FLUSH, s) {} -}; - -//! error reported by the operating system -class CRYPTOPP_DLL OS_Error : public Exception -{ -public: - OS_Error(ErrorType errorType, const std::string &s, const std::string& operation, int errorCode) - : Exception(errorType, s), m_operation(operation), m_errorCode(errorCode) {} - ~OS_Error() throw() {} - - // the operating system API that reported the error - const std::string & GetOperation() const {return m_operation;} - // the error code return by the operating system - int GetErrorCode() const {return m_errorCode;} - -protected: - std::string m_operation; - int m_errorCode; -}; - -//! used to return decoding results -struct CRYPTOPP_DLL DecodingResult -{ - explicit DecodingResult() : isValidCoding(false), messageLength(0) {} - explicit DecodingResult(size_t len) : isValidCoding(true), messageLength(len) {} - - bool operator==(const DecodingResult &rhs) const {return isValidCoding == rhs.isValidCoding && messageLength == rhs.messageLength;} - bool operator!=(const DecodingResult &rhs) const {return !operator==(rhs);} - - bool isValidCoding; - size_t messageLength; - -#ifdef CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY - operator size_t() const {return isValidCoding ? messageLength : 0;} -#endif -}; - -//! interface for retrieving values given their names -/*! \note This class is used to safely pass a variable number of arbitrarily typed arguments to functions - and to read values from keys and crypto parameters. - \note To obtain an object that implements NameValuePairs for the purpose of parameter - passing, use the MakeParameters() function. - \note To get a value from NameValuePairs, you need to know the name and the type of the value. - Call GetValueNames() on a NameValuePairs object to obtain a list of value names that it supports. - Then look at the Name namespace documentation to see what the type of each value is, or - alternatively, call GetIntValue() with the value name, and if the type is not int, a - ValueTypeMismatch exception will be thrown and you can get the actual type from the exception object. -*/ -class CRYPTOPP_NO_VTABLE NameValuePairs -{ -public: - virtual ~NameValuePairs() {} - - //! exception thrown when trying to retrieve a value using a different type than expected - class CRYPTOPP_DLL ValueTypeMismatch : public InvalidArgument - { - public: - ValueTypeMismatch(const std::string &name, const std::type_info &stored, const std::type_info &retrieving) - : InvalidArgument("NameValuePairs: type mismatch for '" + name + "', stored '" + stored.name() + "', trying to retrieve '" + retrieving.name() + "'") - , m_stored(stored), m_retrieving(retrieving) {} - - const std::type_info & GetStoredTypeInfo() const {return m_stored;} - const std::type_info & GetRetrievingTypeInfo() const {return m_retrieving;} - - private: - const std::type_info &m_stored; - const std::type_info &m_retrieving; - }; - - //! get a copy of this object or a subobject of it - template <class T> - bool GetThisObject(T &object) const - { - return GetValue((std::string("ThisObject:")+typeid(T).name()).c_str(), object); - } - - //! get a pointer to this object, as a pointer to T - template <class T> - bool GetThisPointer(T *&p) const - { - return GetValue((std::string("ThisPointer:")+typeid(T).name()).c_str(), p); - } - - //! get a named value, returns true if the name exists - template <class T> - bool GetValue(const char *name, T &value) const - { - return GetVoidValue(name, typeid(T), &value); - } - - //! get a named value, returns the default if the name doesn't exist - template <class T> - T GetValueWithDefault(const char *name, T defaultValue) const - { - GetValue(name, defaultValue); - return defaultValue; - } - - //! get a list of value names that can be retrieved - CRYPTOPP_DLL std::string GetValueNames() const - {std::string result; GetValue("ValueNames", result); return result;} - - //! get a named value with type int - /*! used to ensure we don't accidentally try to get an unsigned int - or some other type when we mean int (which is the most common case) */ - CRYPTOPP_DLL bool GetIntValue(const char *name, int &value) const - {return GetValue(name, value);} - - //! get a named value with type int, with default - CRYPTOPP_DLL int GetIntValueWithDefault(const char *name, int defaultValue) const - {return GetValueWithDefault(name, defaultValue);} - - //! used by derived classes to check for type mismatch - CRYPTOPP_DLL static void CRYPTOPP_API ThrowIfTypeMismatch(const char *name, const std::type_info &stored, const std::type_info &retrieving) - {if (stored != retrieving) throw ValueTypeMismatch(name, stored, retrieving);} - - template <class T> - void GetRequiredParameter(const char *className, const char *name, T &value) const - { - if (!GetValue(name, value)) - throw InvalidArgument(std::string(className) + ": missing required parameter '" + name + "'"); - } - - CRYPTOPP_DLL void GetRequiredIntParameter(const char *className, const char *name, int &value) const - { - if (!GetIntValue(name, value)) - throw InvalidArgument(std::string(className) + ": missing required parameter '" + name + "'"); - } - - //! to be implemented by derived classes, users should use one of the above functions instead - CRYPTOPP_DLL virtual bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const =0; -}; - -//! namespace containing value name definitions -/*! value names, types and semantics: - - ThisObject:ClassName (ClassName, copy of this object or a subobject) - ThisPointer:ClassName (const ClassName *, pointer to this object or a subobject) -*/ -DOCUMENTED_NAMESPACE_BEGIN(Name) -// more names defined in argnames.h -DOCUMENTED_NAMESPACE_END - -//! empty set of name-value pairs -extern CRYPTOPP_DLL const NameValuePairs &g_nullNameValuePairs; - -// ******************************************************** - -//! interface for cloning objects, this is not implemented by most classes yet -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE Clonable -{ -public: - virtual ~Clonable() {} - //! this is not implemented by most classes yet - virtual Clonable* Clone() const {throw NotImplemented("Clone() is not implemented yet.");} // TODO: make this =0 -}; - -//! interface for all crypto algorithms - -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE Algorithm : public Clonable -{ -public: - /*! When FIPS 140-2 compliance is enabled and checkSelfTestStatus == true, - this constructor throws SelfTestFailure if the self test hasn't been run or fails. */ - Algorithm(bool checkSelfTestStatus = true); - //! returns name of this algorithm, not universally implemented yet - virtual std::string AlgorithmName() const {return "unknown";} -}; - -//! keying interface for crypto algorithms that take byte strings as keys -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE SimpleKeyingInterface -{ -public: - virtual ~SimpleKeyingInterface() {} - - //! returns smallest valid key length in bytes */ - virtual size_t MinKeyLength() const =0; - //! returns largest valid key length in bytes */ - virtual size_t MaxKeyLength() const =0; - //! returns default (recommended) key length in bytes */ - virtual size_t DefaultKeyLength() const =0; - - //! returns the smallest valid key length in bytes that is >= min(n, GetMaxKeyLength()) - virtual size_t GetValidKeyLength(size_t n) const =0; - - //! returns whether n is a valid key length - virtual bool IsValidKeyLength(size_t n) const - {return n == GetValidKeyLength(n);} - - //! set or reset the key of this object - /*! \param params is used to specify Rounds, BlockSize, etc. */ - virtual void SetKey(const byte *key, size_t length, const NameValuePairs ¶ms = g_nullNameValuePairs); - - //! calls SetKey() with an NameValuePairs object that just specifies "Rounds" - void SetKeyWithRounds(const byte *key, size_t length, int rounds); - - //! calls SetKey() with an NameValuePairs object that just specifies "IV" - void SetKeyWithIV(const byte *key, size_t length, const byte *iv, size_t ivLength); - - //! calls SetKey() with an NameValuePairs object that just specifies "IV" - void SetKeyWithIV(const byte *key, size_t length, const byte *iv) - {SetKeyWithIV(key, length, iv, IVSize());} - - enum IV_Requirement {UNIQUE_IV = 0, RANDOM_IV, UNPREDICTABLE_RANDOM_IV, INTERNALLY_GENERATED_IV, NOT_RESYNCHRONIZABLE}; - //! returns the minimal requirement for secure IVs - virtual IV_Requirement IVRequirement() const =0; - - //! returns whether this object can be resynchronized (i.e. supports initialization vectors) - /*! If this function returns true, and no IV is passed to SetKey() and CanUseStructuredIVs()==true, an IV of all 0's will be assumed. */ - bool IsResynchronizable() const {return IVRequirement() < NOT_RESYNCHRONIZABLE;} - //! returns whether this object can use random IVs (in addition to ones returned by GetNextIV) - bool CanUseRandomIVs() const {return IVRequirement() <= UNPREDICTABLE_RANDOM_IV;} - //! returns whether this object can use random but possibly predictable IVs (in addition to ones returned by GetNextIV) - bool CanUsePredictableIVs() const {return IVRequirement() <= RANDOM_IV;} - //! returns whether this object can use structured IVs, for example a counter (in addition to ones returned by GetNextIV) - bool CanUseStructuredIVs() const {return IVRequirement() <= UNIQUE_IV;} - - virtual unsigned int IVSize() const {throw NotImplemented(GetAlgorithm().AlgorithmName() + ": this object doesn't support resynchronization");} - //! returns default length of IVs accepted by this object - unsigned int DefaultIVLength() const {return IVSize();} - //! returns minimal length of IVs accepted by this object - virtual unsigned int MinIVLength() const {return IVSize();} - //! returns maximal length of IVs accepted by this object - virtual unsigned int MaxIVLength() const {return IVSize();} - //! resynchronize with an IV. ivLength=-1 means use IVSize() - virtual void Resynchronize(const byte *iv, int ivLength=-1) {throw NotImplemented(GetAlgorithm().AlgorithmName() + ": this object doesn't support resynchronization");} - //! get a secure IV for the next message - /*! This method should be called after you finish encrypting one message and are ready to start the next one. - After calling it, you must call SetKey() or Resynchronize() before using this object again. - This method is not implemented on decryption objects. */ - virtual void GetNextIV(RandomNumberGenerator &rng, byte *IV); - -protected: - virtual const Algorithm & GetAlgorithm() const =0; - virtual void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs ¶ms) =0; - - void ThrowIfInvalidKeyLength(size_t length); - void ThrowIfResynchronizable(); // to be called when no IV is passed - void ThrowIfInvalidIV(const byte *iv); // check for NULL IV if it can't be used - size_t ThrowIfInvalidIVLength(int size); - const byte * GetIVAndThrowIfInvalid(const NameValuePairs ¶ms, size_t &size); - inline void AssertValidKeyLength(size_t length) const - {assert(IsValidKeyLength(length));} -}; - -//! interface for the data processing part of block ciphers - -/*! Classes derived from BlockTransformation are block ciphers - in ECB mode (for example the DES::Encryption class), which are stateless. - These classes should not be used directly, but only in combination with - a mode class (see CipherModeDocumentation in modes.h). -*/ -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE BlockTransformation : public Algorithm -{ -public: - //! encrypt or decrypt inBlock, xor with xorBlock, and write to outBlock - virtual void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const =0; - - //! encrypt or decrypt one block - /*! \pre size of inBlock and outBlock == BlockSize() */ - void ProcessBlock(const byte *inBlock, byte *outBlock) const - {ProcessAndXorBlock(inBlock, NULL, outBlock);} - - //! encrypt or decrypt one block in place - void ProcessBlock(byte *inoutBlock) const - {ProcessAndXorBlock(inoutBlock, NULL, inoutBlock);} - - //! block size of the cipher in bytes - virtual unsigned int BlockSize() const =0; - - //! returns how inputs and outputs should be aligned for optimal performance - virtual unsigned int OptimalDataAlignment() const; - - //! returns true if this is a permutation (i.e. there is an inverse transformation) - virtual bool IsPermutation() const {return true;} - - //! returns true if this is an encryption object - virtual bool IsForwardTransformation() const =0; - - //! return number of blocks that can be processed in parallel, for bit-slicing implementations - virtual unsigned int OptimalNumberOfParallelBlocks() const {return 1;} - - enum {BT_InBlockIsCounter=1, BT_DontIncrementInOutPointers=2, BT_XorInput=4, BT_ReverseDirection=8, BT_AllowParallel=16} FlagsForAdvancedProcessBlocks; - - //! encrypt and xor blocks according to flags (see FlagsForAdvancedProcessBlocks) - /*! /note If BT_InBlockIsCounter is set, last byte of inBlocks may be modified. */ - virtual size_t AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const; - - inline CipherDir GetCipherDirection() const {return IsForwardTransformation() ? ENCRYPTION : DECRYPTION;} -}; - -//! interface for the data processing part of stream ciphers - -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE StreamTransformation : public Algorithm -{ -public: - //! return a reference to this object, useful for passing a temporary object to a function that takes a non-const reference - StreamTransformation& Ref() {return *this;} - - //! returns block size, if input must be processed in blocks, otherwise 1 - virtual unsigned int MandatoryBlockSize() const {return 1;} - - //! returns the input block size that is most efficient for this cipher - /*! \note optimal input length is n * OptimalBlockSize() - GetOptimalBlockSizeUsed() for any n > 0 */ - virtual unsigned int OptimalBlockSize() const {return MandatoryBlockSize();} - //! returns how much of the current block is used up - virtual unsigned int GetOptimalBlockSizeUsed() const {return 0;} - - //! returns how input should be aligned for optimal performance - virtual unsigned int OptimalDataAlignment() const; - - //! encrypt or decrypt an array of bytes of specified length - /*! \note either inString == outString, or they don't overlap */ - virtual void ProcessData(byte *outString, const byte *inString, size_t length) =0; - - //! for ciphers where the last block of data is special, encrypt or decrypt the last block of data - /*! For now the only use of this function is for CBC-CTS mode. */ - virtual void ProcessLastBlock(byte *outString, const byte *inString, size_t length); - //! returns the minimum size of the last block, 0 indicating the last block is not special - virtual unsigned int MinLastBlockSize() const {return 0;} - - //! same as ProcessData(inoutString, inoutString, length) - inline void ProcessString(byte *inoutString, size_t length) - {ProcessData(inoutString, inoutString, length);} - //! same as ProcessData(outString, inString, length) - inline void ProcessString(byte *outString, const byte *inString, size_t length) - {ProcessData(outString, inString, length);} - //! implemented as {ProcessData(&input, &input, 1); return input;} - inline byte ProcessByte(byte input) - {ProcessData(&input, &input, 1); return input;} - - //! returns whether this cipher supports random access - virtual bool IsRandomAccess() const =0; - //! for random access ciphers, seek to an absolute position - virtual void Seek(lword n) - { - assert(!IsRandomAccess()); - throw NotImplemented("StreamTransformation: this object doesn't support random access"); - } - - //! returns whether this transformation is self-inverting (e.g. xor with a keystream) - virtual bool IsSelfInverting() const =0; - //! returns whether this is an encryption object - virtual bool IsForwardTransformation() const =0; -}; - -//! interface for hash functions and data processing part of MACs - -/*! HashTransformation objects are stateful. They are created in an initial state, - change state as Update() is called, and return to the initial - state when Final() is called. This interface allows a large message to - be hashed in pieces by calling Update() on each piece followed by - calling Final(). -*/ -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE HashTransformation : public Algorithm -{ -public: - //! return a reference to this object, useful for passing a temporary object to a function that takes a non-const reference - HashTransformation& Ref() {return *this;} - - //! process more input - virtual void Update(const byte *input, size_t length) =0; - - //! request space to write input into - virtual byte * CreateUpdateSpace(size_t &size) {size=0; return NULL;} - - //! compute hash for current message, then restart for a new message - /*! \pre size of digest == DigestSize(). */ - virtual void Final(byte *digest) - {TruncatedFinal(digest, DigestSize());} - - //! discard the current state, and restart with a new message - virtual void Restart() - {TruncatedFinal(NULL, 0);} - - //! size of the hash/digest/MAC returned by Final() - virtual unsigned int DigestSize() const =0; - - //! same as DigestSize() - unsigned int TagSize() const {return DigestSize();} - - - //! block size of underlying compression function, or 0 if not block based - virtual unsigned int BlockSize() const {return 0;} - - //! input to Update() should have length a multiple of this for optimal speed - virtual unsigned int OptimalBlockSize() const {return 1;} - - //! returns how input should be aligned for optimal performance - virtual unsigned int OptimalDataAlignment() const; - - //! use this if your input is in one piece and you don't want to call Update() and Final() separately - virtual void CalculateDigest(byte *digest, const byte *input, size_t length) - {Update(input, length); Final(digest);} - - //! verify that digest is a valid digest for the current message, then reinitialize the object - /*! Default implementation is to call Final() and do a bitwise comparison - between its output and digest. */ - virtual bool Verify(const byte *digest) - {return TruncatedVerify(digest, DigestSize());} - - //! use this if your input is in one piece and you don't want to call Update() and Verify() separately - virtual bool VerifyDigest(const byte *digest, const byte *input, size_t length) - {Update(input, length); return Verify(digest);} - - //! truncated version of Final() - virtual void TruncatedFinal(byte *digest, size_t digestSize) =0; - - //! truncated version of CalculateDigest() - virtual void CalculateTruncatedDigest(byte *digest, size_t digestSize, const byte *input, size_t length) - {Update(input, length); TruncatedFinal(digest, digestSize);} - - //! truncated version of Verify() - virtual bool TruncatedVerify(const byte *digest, size_t digestLength); - - //! truncated version of VerifyDigest() - virtual bool VerifyTruncatedDigest(const byte *digest, size_t digestLength, const byte *input, size_t length) - {Update(input, length); return TruncatedVerify(digest, digestLength);} - -protected: - void ThrowIfInvalidTruncatedSize(size_t size) const; -}; - -typedef HashTransformation HashFunction; - -//! interface for one direction (encryption or decryption) of a block cipher -/*! \note These objects usually should not be used directly. See BlockTransformation for more details. */ -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE BlockCipher : public SimpleKeyingInterface, public BlockTransformation -{ -protected: - const Algorithm & GetAlgorithm() const {return *this;} -}; - -//! interface for one direction (encryption or decryption) of a stream cipher or cipher mode -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE SymmetricCipher : public SimpleKeyingInterface, public StreamTransformation -{ -protected: - const Algorithm & GetAlgorithm() const {return *this;} -}; - -//! interface for message authentication codes -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE MessageAuthenticationCode : public SimpleKeyingInterface, public HashTransformation -{ -protected: - const Algorithm & GetAlgorithm() const {return *this;} -}; - -//! interface for for one direction (encryption or decryption) of a stream cipher or block cipher mode with authentication -/*! The StreamTransformation part of this interface is used to encrypt/decrypt the data, and the MessageAuthenticationCode part of this - interface is used to input additional authenticated data (AAD, which is MAC'ed but not encrypted), and to generate/verify the MAC. */ -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE AuthenticatedSymmetricCipher : public MessageAuthenticationCode, public StreamTransformation -{ -public: - //! this indicates that a member function was called in the wrong state, for example trying to encrypt a message before having set the key or IV - class BadState : public Exception - { - public: - explicit BadState(const std::string &name, const char *message) : Exception(OTHER_ERROR, name + ": " + message) {} - explicit BadState(const std::string &name, const char *function, const char *state) : Exception(OTHER_ERROR, name + ": " + function + " was called before " + state) {} - }; - - //! the maximum length of AAD that can be input before the encrypted data - virtual lword MaxHeaderLength() const =0; - //! the maximum length of encrypted data - virtual lword MaxMessageLength() const =0; - //! the maximum length of AAD that can be input after the encrypted data - virtual lword MaxFooterLength() const {return 0;} - //! if this function returns true, SpecifyDataLengths() must be called before attempting to input data - /*! This is the case for some schemes, such as CCM. */ - virtual bool NeedsPrespecifiedDataLengths() const {return false;} - //! this function only needs to be called if NeedsPrespecifiedDataLengths() returns true - void SpecifyDataLengths(lword headerLength, lword messageLength, lword footerLength=0); - //! encrypt and generate MAC in one call. will truncate MAC if macSize < TagSize() - virtual void EncryptAndAuthenticate(byte *ciphertext, byte *mac, size_t macSize, const byte *iv, int ivLength, const byte *header, size_t headerLength, const byte *message, size_t messageLength); - //! decrypt and verify MAC in one call, returning true iff MAC is valid. will assume MAC is truncated if macLength < TagSize() - virtual bool DecryptAndVerify(byte *message, const byte *mac, size_t macLength, const byte *iv, int ivLength, const byte *header, size_t headerLength, const byte *ciphertext, size_t ciphertextLength); - - // redeclare this to avoid compiler ambiguity errors - virtual std::string AlgorithmName() const =0; - -protected: - const Algorithm & GetAlgorithm() const {return *static_cast<const MessageAuthenticationCode *>(this);} - virtual void UncheckedSpecifyDataLengths(lword headerLength, lword messageLength, lword footerLength) {} -}; - -#ifdef CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY -typedef SymmetricCipher StreamCipher; -#endif - -//! interface for random number generators -/*! All return values are uniformly distributed over the range specified. -*/ -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE RandomNumberGenerator : public Algorithm -{ -public: - //! update RNG state with additional unpredictable values - virtual void IncorporateEntropy(const byte *input, size_t length) {throw NotImplemented("RandomNumberGenerator: IncorporateEntropy not implemented");} - - //! returns true if IncorporateEntropy is implemented - virtual bool CanIncorporateEntropy() const {return false;} - - //! generate new random byte and return it - virtual byte GenerateByte(); - - //! generate new random bit and return it - /*! Default implementation is to call GenerateByte() and return its lowest bit. */ - virtual unsigned int GenerateBit(); - - //! generate a random 32 bit word in the range min to max, inclusive - virtual word32 GenerateWord32(word32 a=0, word32 b=0xffffffffL); - - //! generate random array of bytes - virtual void GenerateBlock(byte *output, size_t size); - - //! generate and discard n bytes - virtual void DiscardBytes(size_t n); - - //! generate random bytes as input to a BufferedTransformation - virtual void GenerateIntoBufferedTransformation(BufferedTransformation &target, const std::string &channel, lword length); - - //! randomly shuffle the specified array, resulting permutation is uniformly distributed - template <class IT> void Shuffle(IT begin, IT end) - { - for (; begin != end; ++begin) - std::iter_swap(begin, begin + GenerateWord32(0, end-begin-1)); - } - -#ifdef CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY - byte GetByte() {return GenerateByte();} - unsigned int GetBit() {return GenerateBit();} - word32 GetLong(word32 a=0, word32 b=0xffffffffL) {return GenerateWord32(a, b);} - word16 GetShort(word16 a=0, word16 b=0xffff) {return (word16)GenerateWord32(a, b);} - void GetBlock(byte *output, size_t size) {GenerateBlock(output, size);} -#endif -}; - -//! returns a reference that can be passed to functions that ask for a RNG but doesn't actually use it -CRYPTOPP_DLL RandomNumberGenerator & CRYPTOPP_API NullRNG(); - -class WaitObjectContainer; -class CallStack; - -//! interface for objects that you can wait for - -class CRYPTOPP_NO_VTABLE Waitable -{ -public: - virtual ~Waitable() {} - - //! maximum number of wait objects that this object can return - virtual unsigned int GetMaxWaitObjectCount() const =0; - //! put wait objects into container - /*! \param callStack is used for tracing no wait loops, example: - something.GetWaitObjects(c, CallStack("my func after X", 0)); - - or in an outer GetWaitObjects() method that itself takes a callStack parameter: - innerThing.GetWaitObjects(c, CallStack("MyClass::GetWaitObjects at X", &callStack)); */ - virtual void GetWaitObjects(WaitObjectContainer &container, CallStack const& callStack) =0; - //! wait on this object - /*! same as creating an empty container, calling GetWaitObjects(), and calling Wait() on the container */ - bool Wait(unsigned long milliseconds, CallStack const& callStack); -}; - -//! the default channel for BufferedTransformation, equal to the empty string -extern CRYPTOPP_DLL const std::string DEFAULT_CHANNEL; - -//! channel for additional authenticated data, equal to "AAD" -extern CRYPTOPP_DLL const std::string AAD_CHANNEL; - -//! interface for buffered transformations - -/*! BufferedTransformation is a generalization of BlockTransformation, - StreamTransformation, and HashTransformation. - - A buffered transformation is an object that takes a stream of bytes - as input (this may be done in stages), does some computation on them, and - then places the result into an internal buffer for later retrieval. Any - partial result already in the output buffer is not modified by further - input. - - If a method takes a "blocking" parameter, and you - pass "false" for it, the method will return before all input has been processed if - the input cannot be processed without waiting (for network buffers to become available, for example). - In this case the method will return true - or a non-zero integer value. When this happens you must continue to call the method with the same - parameters until it returns false or zero, before calling any other method on it or - attached BufferedTransformation. The integer return value in this case is approximately - the number of bytes left to be processed, and can be used to implement a progress bar. - - For functions that take a "propagation" parameter, propagation != 0 means pass on the signal to attached - BufferedTransformation objects, with propagation decremented at each step until it reaches 0. - -1 means unlimited propagation. - - \nosubgrouping -*/ -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE BufferedTransformation : public Algorithm, public Waitable -{ -public: - // placed up here for CW8 - static const std::string &NULL_CHANNEL; // same as DEFAULT_CHANNEL, for backwards compatibility - - BufferedTransformation() : Algorithm(false) {} - - //! return a reference to this object, useful for passing a temporary object to a function that takes a non-const reference - BufferedTransformation& Ref() {return *this;} - - //! \name INPUT - //@{ - //! input a byte for processing - size_t Put(byte inByte, bool blocking=true) - {return Put(&inByte, 1, blocking);} - //! input multiple bytes - size_t Put(const byte *inString, size_t length, bool blocking=true) - {return Put2(inString, length, 0, blocking);} - - //! input a 16-bit word - size_t PutWord16(word16 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true); - //! input a 32-bit word - size_t PutWord32(word32 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true); - - //! request space which can be written into by the caller, and then used as input to Put() - /*! \param size is requested size (as a hint) for input, and size of the returned space for output */ - /*! \note The purpose of this method is to help avoid doing extra memory allocations. */ - virtual byte * CreatePutSpace(size_t &size) {size=0; return NULL;} - - virtual bool CanModifyInput() const {return false;} - - //! input multiple bytes that may be modified by callee - size_t PutModifiable(byte *inString, size_t length, bool blocking=true) - {return PutModifiable2(inString, length, 0, blocking);} - - bool MessageEnd(int propagation=-1, bool blocking=true) - {return !!Put2(NULL, 0, propagation < 0 ? -1 : propagation+1, blocking);} - size_t PutMessageEnd(const byte *inString, size_t length, int propagation=-1, bool blocking=true) - {return Put2(inString, length, propagation < 0 ? -1 : propagation+1, blocking);} - - //! input multiple bytes for blocking or non-blocking processing - /*! \param messageEnd means how many filters to signal MessageEnd to, including this one */ - virtual size_t Put2(const byte *inString, size_t length, int messageEnd, bool blocking) =0; - //! input multiple bytes that may be modified by callee for blocking or non-blocking processing - /*! \param messageEnd means how many filters to signal MessageEnd to, including this one */ - virtual size_t PutModifiable2(byte *inString, size_t length, int messageEnd, bool blocking) - {return Put2(inString, length, messageEnd, blocking);} - - //! thrown by objects that have not implemented nonblocking input processing - struct BlockingInputOnly : public NotImplemented - {BlockingInputOnly(const std::string &s) : NotImplemented(s + ": Nonblocking input is not implemented by this object.") {}}; - //@} - - //! \name WAITING - //@{ - unsigned int GetMaxWaitObjectCount() const; - void GetWaitObjects(WaitObjectContainer &container, CallStack const& callStack); - //@} - - //! \name SIGNALS - //@{ - virtual void IsolatedInitialize(const NameValuePairs ¶meters) {throw NotImplemented("BufferedTransformation: this object can't be reinitialized");} - virtual bool IsolatedFlush(bool hardFlush, bool blocking) =0; - virtual bool IsolatedMessageSeriesEnd(bool blocking) {return false;} - - //! initialize or reinitialize this object - virtual void Initialize(const NameValuePairs ¶meters=g_nullNameValuePairs, int propagation=-1); - //! flush buffered input and/or output - /*! \param hardFlush is used to indicate whether all data should be flushed - \note Hard flushes must be used with care. It means try to process and output everything, even if - there may not be enough data to complete the action. For example, hard flushing a HexDecoder would - cause an error if you do it after inputing an odd number of hex encoded characters. - For some types of filters, for example ZlibDecompressor, hard flushes can only - be done at "synchronization points". These synchronization points are positions in the data - stream that are created by hard flushes on the corresponding reverse filters, in this - example ZlibCompressor. This is useful when zlib compressed data is moved across a - network in packets and compression state is preserved across packets, as in the ssh2 protocol. - */ - virtual bool Flush(bool hardFlush, int propagation=-1, bool blocking=true); - //! mark end of a series of messages - /*! There should be a MessageEnd immediately before MessageSeriesEnd. */ - virtual bool MessageSeriesEnd(int propagation=-1, bool blocking=true); - - //! set propagation of automatically generated and transferred signals - /*! propagation == 0 means do not automaticly generate signals */ - virtual void SetAutoSignalPropagation(int propagation) {} - - //! - virtual int GetAutoSignalPropagation() const {return 0;} -public: - -#ifdef CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY - void Close() {MessageEnd();} -#endif - //@} - - //! \name RETRIEVAL OF ONE MESSAGE - //@{ - //! returns number of bytes that is currently ready for retrieval - /*! All retrieval functions return the actual number of bytes - retrieved, which is the lesser of the request number and - MaxRetrievable(). */ - virtual lword MaxRetrievable() const; - - //! returns whether any bytes are currently ready for retrieval - virtual bool AnyRetrievable() const; - - //! try to retrieve a single byte - virtual size_t Get(byte &outByte); - //! try to retrieve multiple bytes - virtual size_t Get(byte *outString, size_t getMax); - - //! peek at the next byte without removing it from the output buffer - virtual size_t Peek(byte &outByte) const; - //! peek at multiple bytes without removing them from the output buffer - virtual size_t Peek(byte *outString, size_t peekMax) const; - - //! try to retrieve a 16-bit word - size_t GetWord16(word16 &value, ByteOrder order=BIG_ENDIAN_ORDER); - //! try to retrieve a 32-bit word - size_t GetWord32(word32 &value, ByteOrder order=BIG_ENDIAN_ORDER); - - //! try to peek at a 16-bit word - size_t PeekWord16(word16 &value, ByteOrder order=BIG_ENDIAN_ORDER) const; - //! try to peek at a 32-bit word - size_t PeekWord32(word32 &value, ByteOrder order=BIG_ENDIAN_ORDER) const; - - //! move transferMax bytes of the buffered output to target as input - lword TransferTo(BufferedTransformation &target, lword transferMax=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL) - {TransferTo2(target, transferMax, channel); return transferMax;} - - //! discard skipMax bytes from the output buffer - virtual lword Skip(lword skipMax=LWORD_MAX); - - //! copy copyMax bytes of the buffered output to target as input - lword CopyTo(BufferedTransformation &target, lword copyMax=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL) const - {return CopyRangeTo(target, 0, copyMax, channel);} - - //! copy copyMax bytes of the buffered output, starting at position (relative to current position), to target as input - lword CopyRangeTo(BufferedTransformation &target, lword position, lword copyMax=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL) const - {lword i = position; CopyRangeTo2(target, i, i+copyMax, channel); return i-position;} - -#ifdef CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY - unsigned long MaxRetrieveable() const {return MaxRetrievable();} -#endif - //@} - - //! \name RETRIEVAL OF MULTIPLE MESSAGES - //@{ - //! - virtual lword TotalBytesRetrievable() const; - //! number of times MessageEnd() has been received minus messages retrieved or skipped - virtual unsigned int NumberOfMessages() const; - //! returns true if NumberOfMessages() > 0 - virtual bool AnyMessages() const; - //! start retrieving the next message - /*! - Returns false if no more messages exist or this message - is not completely retrieved. - */ - virtual bool GetNextMessage(); - //! skip count number of messages - virtual unsigned int SkipMessages(unsigned int count=UINT_MAX); - //! - unsigned int TransferMessagesTo(BufferedTransformation &target, unsigned int count=UINT_MAX, const std::string &channel=DEFAULT_CHANNEL) - {TransferMessagesTo2(target, count, channel); return count;} - //! - unsigned int CopyMessagesTo(BufferedTransformation &target, unsigned int count=UINT_MAX, const std::string &channel=DEFAULT_CHANNEL) const; - - //! - virtual void SkipAll(); - //! - void TransferAllTo(BufferedTransformation &target, const std::string &channel=DEFAULT_CHANNEL) - {TransferAllTo2(target, channel);} - //! - void CopyAllTo(BufferedTransformation &target, const std::string &channel=DEFAULT_CHANNEL) const; - - virtual bool GetNextMessageSeries() {return false;} - virtual unsigned int NumberOfMessagesInThisSeries() const {return NumberOfMessages();} - virtual unsigned int NumberOfMessageSeries() const {return 0;} - //@} - - //! \name NON-BLOCKING TRANSFER OF OUTPUT - //@{ - //! upon return, byteCount contains number of bytes that have finished being transfered, and returns the number of bytes left in the current transfer block - virtual size_t TransferTo2(BufferedTransformation &target, lword &byteCount, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) =0; - //! upon return, begin contains the start position of data yet to be finished copying, and returns the number of bytes left in the current transfer block - virtual size_t CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const =0; - //! upon return, messageCount contains number of messages that have finished being transfered, and returns the number of bytes left in the current transfer block - size_t TransferMessagesTo2(BufferedTransformation &target, unsigned int &messageCount, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true); - //! returns the number of bytes left in the current transfer block - size_t TransferAllTo2(BufferedTransformation &target, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true); - //@} - - //! \name CHANNELS - //@{ - struct NoChannelSupport : public NotImplemented - {NoChannelSupport(const std::string &name) : NotImplemented(name + ": this object doesn't support multiple channels") {}}; - struct InvalidChannelName : public InvalidArgument - {InvalidChannelName(const std::string &name, const std::string &channel) : InvalidArgument(name + ": unexpected channel name \"" + channel + "\"") {}}; - - size_t ChannelPut(const std::string &channel, byte inByte, bool blocking=true) - {return ChannelPut(channel, &inByte, 1, blocking);} - size_t ChannelPut(const std::string &channel, const byte *inString, size_t length, bool blocking=true) - {return ChannelPut2(channel, inString, length, 0, blocking);} - - size_t ChannelPutModifiable(const std::string &channel, byte *inString, size_t length, bool blocking=true) - {return ChannelPutModifiable2(channel, inString, length, 0, blocking);} - - size_t ChannelPutWord16(const std::string &channel, word16 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true); - size_t ChannelPutWord32(const std::string &channel, word32 value, ByteOrder order=BIG_ENDIAN_ORDER, bool blocking=true); - - bool ChannelMessageEnd(const std::string &channel, int propagation=-1, bool blocking=true) - {return !!ChannelPut2(channel, NULL, 0, propagation < 0 ? -1 : propagation+1, blocking);} - size_t ChannelPutMessageEnd(const std::string &channel, const byte *inString, size_t length, int propagation=-1, bool blocking=true) - {return ChannelPut2(channel, inString, length, propagation < 0 ? -1 : propagation+1, blocking);} - - virtual byte * ChannelCreatePutSpace(const std::string &channel, size_t &size); - - virtual size_t ChannelPut2(const std::string &channel, const byte *begin, size_t length, int messageEnd, bool blocking); - virtual size_t ChannelPutModifiable2(const std::string &channel, byte *begin, size_t length, int messageEnd, bool blocking); - - virtual bool ChannelFlush(const std::string &channel, bool hardFlush, int propagation=-1, bool blocking=true); - virtual bool ChannelMessageSeriesEnd(const std::string &channel, int propagation=-1, bool blocking=true); - - virtual void SetRetrievalChannel(const std::string &channel); - //@} - - //! \name ATTACHMENT - /*! Some BufferedTransformation objects (e.g. Filter objects) - allow other BufferedTransformation objects to be attached. When - this is done, the first object instead of buffering its output, - sents that output to the attached object as input. The entire - attachment chain is deleted when the anchor object is destructed. - */ - //@{ - //! returns whether this object allows attachment - virtual bool Attachable() {return false;} - //! returns the object immediately attached to this object or NULL for no attachment - virtual BufferedTransformation *AttachedTransformation() {assert(!Attachable()); return 0;} - //! - virtual const BufferedTransformation *AttachedTransformation() const - {return const_cast<BufferedTransformation *>(this)->AttachedTransformation();} - //! delete the current attachment chain and replace it with newAttachment - virtual void Detach(BufferedTransformation *newAttachment = 0) - {assert(!Attachable()); throw NotImplemented("BufferedTransformation: this object is not attachable");} - //! add newAttachment to the end of attachment chain - virtual void Attach(BufferedTransformation *newAttachment); - //@} - -protected: - static int DecrementPropagation(int propagation) - {return propagation != 0 ? propagation - 1 : 0;} - -private: - byte m_buf[4]; // for ChannelPutWord16 and ChannelPutWord32, to ensure buffer isn't deallocated before non-blocking operation completes -}; - -//! returns a reference to a BufferedTransformation object that discards all input -BufferedTransformation & TheBitBucket(); - -//! interface for crypto material, such as public and private keys, and crypto parameters - -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE CryptoMaterial : public NameValuePairs -{ -public: - //! exception thrown when invalid crypto material is detected - class CRYPTOPP_DLL InvalidMaterial : public InvalidDataFormat - { - public: - explicit InvalidMaterial(const std::string &s) : InvalidDataFormat(s) {} - }; - - //! assign values from source to this object - /*! \note This function can be used to create a public key from a private key. */ - virtual void AssignFrom(const NameValuePairs &source) =0; - - //! check this object for errors - /*! \param level denotes the level of thoroughness: - 0 - using this object won't cause a crash or exception (rng is ignored) - 1 - this object will probably function (encrypt, sign, etc.) correctly (but may not check for weak keys and such) - 2 - make sure this object will function correctly, and do reasonable security checks - 3 - do checks that may take a long time - \return true if the tests pass */ - virtual bool Validate(RandomNumberGenerator &rng, unsigned int level) const =0; - - //! throws InvalidMaterial if this object fails Validate() test - virtual void ThrowIfInvalid(RandomNumberGenerator &rng, unsigned int level) const - {if (!Validate(rng, level)) throw InvalidMaterial("CryptoMaterial: this object contains invalid values");} - -// virtual std::vector<std::string> GetSupportedFormats(bool includeSaveOnly=false, bool includeLoadOnly=false); - - //! save key into a BufferedTransformation - virtual void Save(BufferedTransformation &bt) const - {throw NotImplemented("CryptoMaterial: this object does not support saving");} - - //! load key from a BufferedTransformation - /*! \throws KeyingErr if decode fails - \note Generally does not check that the key is valid. - Call ValidateKey() or ThrowIfInvalidKey() to check that. */ - virtual void Load(BufferedTransformation &bt) - {throw NotImplemented("CryptoMaterial: this object does not support loading");} - - //! \return whether this object supports precomputation - virtual bool SupportsPrecomputation() const {return false;} - //! do precomputation - /*! The exact semantics of Precompute() is varies, but - typically it means calculate a table of n objects - that can be used later to speed up computation. */ - virtual void Precompute(unsigned int n) - {assert(!SupportsPrecomputation()); throw NotImplemented("CryptoMaterial: this object does not support precomputation");} - //! retrieve previously saved precomputation - virtual void LoadPrecomputation(BufferedTransformation &storedPrecomputation) - {assert(!SupportsPrecomputation()); throw NotImplemented("CryptoMaterial: this object does not support precomputation");} - //! save precomputation for later use - virtual void SavePrecomputation(BufferedTransformation &storedPrecomputation) const - {assert(!SupportsPrecomputation()); throw NotImplemented("CryptoMaterial: this object does not support precomputation");} - - // for internal library use - void DoQuickSanityCheck() const {ThrowIfInvalid(NullRNG(), 0);} - -#if (defined(__SUNPRO_CC) && __SUNPRO_CC < 0x590) - // Sun Studio 11/CC 5.8 workaround: it generates incorrect code when casting to an empty virtual base class - char m_sunCCworkaround; -#endif -}; - -//! interface for generatable crypto material, such as private keys and crypto parameters - -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE GeneratableCryptoMaterial : virtual public CryptoMaterial -{ -public: - //! generate a random key or crypto parameters - /*! \throws KeyingErr if algorithm parameters are invalid, or if a key can't be generated - (e.g., if this is a public key object) */ - virtual void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs ¶ms = g_nullNameValuePairs) - {throw NotImplemented("GeneratableCryptoMaterial: this object does not support key/parameter generation");} - - //! calls the above function with a NameValuePairs object that just specifies "KeySize" - void GenerateRandomWithKeySize(RandomNumberGenerator &rng, unsigned int keySize); -}; - -//! interface for public keys - -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE PublicKey : virtual public CryptoMaterial -{ -}; - -//! interface for private keys - -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE PrivateKey : public GeneratableCryptoMaterial -{ -}; - -//! interface for crypto prameters - -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE CryptoParameters : public GeneratableCryptoMaterial -{ -}; - -//! interface for asymmetric algorithms - -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE AsymmetricAlgorithm : public Algorithm -{ -public: - //! returns a reference to the crypto material used by this object - virtual CryptoMaterial & AccessMaterial() =0; - //! returns a const reference to the crypto material used by this object - virtual const CryptoMaterial & GetMaterial() const =0; - - //! for backwards compatibility, calls AccessMaterial().Load(bt) - void BERDecode(BufferedTransformation &bt) - {AccessMaterial().Load(bt);} - //! for backwards compatibility, calls GetMaterial().Save(bt) - void DEREncode(BufferedTransformation &bt) const - {GetMaterial().Save(bt);} -}; - -//! interface for asymmetric algorithms using public keys - -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE PublicKeyAlgorithm : public AsymmetricAlgorithm -{ -public: - // VC60 workaround: no co-variant return type - CryptoMaterial & AccessMaterial() {return AccessPublicKey();} - const CryptoMaterial & GetMaterial() const {return GetPublicKey();} - - virtual PublicKey & AccessPublicKey() =0; - virtual const PublicKey & GetPublicKey() const {return const_cast<PublicKeyAlgorithm *>(this)->AccessPublicKey();} -}; - -//! interface for asymmetric algorithms using private keys - -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE PrivateKeyAlgorithm : public AsymmetricAlgorithm -{ -public: - CryptoMaterial & AccessMaterial() {return AccessPrivateKey();} - const CryptoMaterial & GetMaterial() const {return GetPrivateKey();} - - virtual PrivateKey & AccessPrivateKey() =0; - virtual const PrivateKey & GetPrivateKey() const {return const_cast<PrivateKeyAlgorithm *>(this)->AccessPrivateKey();} -}; - -//! interface for key agreement algorithms - -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE KeyAgreementAlgorithm : public AsymmetricAlgorithm -{ -public: - CryptoMaterial & AccessMaterial() {return AccessCryptoParameters();} - const CryptoMaterial & GetMaterial() const {return GetCryptoParameters();} - - virtual CryptoParameters & AccessCryptoParameters() =0; - virtual const CryptoParameters & GetCryptoParameters() const {return const_cast<KeyAgreementAlgorithm *>(this)->AccessCryptoParameters();} -}; - -//! interface for public-key encryptors and decryptors - -/*! This class provides an interface common to encryptors and decryptors - for querying their plaintext and ciphertext lengths. -*/ -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE PK_CryptoSystem -{ -public: - virtual ~PK_CryptoSystem() {} - - //! maximum length of plaintext for a given ciphertext length - /*! \note This function returns 0 if ciphertextLength is not valid (too long or too short). */ - virtual size_t MaxPlaintextLength(size_t ciphertextLength) const =0; - - //! calculate length of ciphertext given length of plaintext - /*! \note This function returns 0 if plaintextLength is not valid (too long). */ - virtual size_t CiphertextLength(size_t plaintextLength) const =0; - - //! this object supports the use of the parameter with the given name - /*! some possible parameter names: EncodingParameters, KeyDerivationParameters */ - virtual bool ParameterSupported(const char *name) const =0; - - //! return fixed ciphertext length, if one exists, otherwise return 0 - /*! \note "Fixed" here means length of ciphertext does not depend on length of plaintext. - It usually does depend on the key length. */ - virtual size_t FixedCiphertextLength() const {return 0;} - - //! return maximum plaintext length given the fixed ciphertext length, if one exists, otherwise return 0 - virtual size_t FixedMaxPlaintextLength() const {return 0;} - -#ifdef CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY - size_t MaxPlainTextLength(size_t cipherTextLength) const {return MaxPlaintextLength(cipherTextLength);} - size_t CipherTextLength(size_t plainTextLength) const {return CiphertextLength(plainTextLength);} -#endif -}; - -//! interface for public-key encryptors -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE PK_Encryptor : public PK_CryptoSystem, public PublicKeyAlgorithm -{ -public: - //! exception thrown when trying to encrypt plaintext of invalid length - class CRYPTOPP_DLL InvalidPlaintextLength : public Exception - { - public: - InvalidPlaintextLength() : Exception(OTHER_ERROR, "PK_Encryptor: invalid plaintext length") {} - }; - - //! encrypt a byte string - /*! \pre CiphertextLength(plaintextLength) != 0 (i.e., plaintext isn't too long) - \pre size of ciphertext == CiphertextLength(plaintextLength) - */ - virtual void Encrypt(RandomNumberGenerator &rng, - const byte *plaintext, size_t plaintextLength, - byte *ciphertext, const NameValuePairs ¶meters = g_nullNameValuePairs) const =0; - - //! create a new encryption filter - /*! \note The caller is responsible for deleting the returned pointer. - \note Encoding parameters should be passed in the "EP" channel. - */ - virtual BufferedTransformation * CreateEncryptionFilter(RandomNumberGenerator &rng, - BufferedTransformation *attachment=NULL, const NameValuePairs ¶meters = g_nullNameValuePairs) const; -}; - -//! interface for public-key decryptors - -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE PK_Decryptor : public PK_CryptoSystem, public PrivateKeyAlgorithm -{ -public: - //! decrypt a byte string, and return the length of plaintext - /*! \pre size of plaintext == MaxPlaintextLength(ciphertextLength) bytes. - \return the actual length of the plaintext, indication that decryption failed. - */ - virtual DecodingResult Decrypt(RandomNumberGenerator &rng, - const byte *ciphertext, size_t ciphertextLength, - byte *plaintext, const NameValuePairs ¶meters = g_nullNameValuePairs) const =0; - - //! create a new decryption filter - /*! \note caller is responsible for deleting the returned pointer - */ - virtual BufferedTransformation * CreateDecryptionFilter(RandomNumberGenerator &rng, - BufferedTransformation *attachment=NULL, const NameValuePairs ¶meters = g_nullNameValuePairs) const; - - //! decrypt a fixed size ciphertext - DecodingResult FixedLengthDecrypt(RandomNumberGenerator &rng, const byte *ciphertext, byte *plaintext, const NameValuePairs ¶meters = g_nullNameValuePairs) const - {return Decrypt(rng, ciphertext, FixedCiphertextLength(), plaintext, parameters);} -}; - -#ifdef CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY -typedef PK_CryptoSystem PK_FixedLengthCryptoSystem; -typedef PK_Encryptor PK_FixedLengthEncryptor; -typedef PK_Decryptor PK_FixedLengthDecryptor; -#endif - -//! interface for public-key signers and verifiers - -/*! This class provides an interface common to signers and verifiers - for querying scheme properties. -*/ -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE PK_SignatureScheme -{ -public: - //! invalid key exception, may be thrown by any function in this class if the private or public key has a length that can't be used - class CRYPTOPP_DLL InvalidKeyLength : public Exception - { - public: - InvalidKeyLength(const std::string &message) : Exception(OTHER_ERROR, message) {} - }; - - //! key too short exception, may be thrown by any function in this class if the private or public key is too short to sign or verify anything - class CRYPTOPP_DLL KeyTooShort : public InvalidKeyLength - { - public: - KeyTooShort() : InvalidKeyLength("PK_Signer: key too short for this signature scheme") {} - }; - - virtual ~PK_SignatureScheme() {} - - //! signature length if it only depends on the key, otherwise 0 - virtual size_t SignatureLength() const =0; - - //! maximum signature length produced for a given length of recoverable message part - virtual size_t MaxSignatureLength(size_t recoverablePartLength = 0) const {return SignatureLength();} - - //! length of longest message that can be recovered, or 0 if this signature scheme does not support message recovery - virtual size_t MaxRecoverableLength() const =0; - - //! length of longest message that can be recovered from a signature of given length, or 0 if this signature scheme does not support message recovery - virtual size_t MaxRecoverableLengthFromSignatureLength(size_t signatureLength) const =0; - - //! requires a random number generator to sign - /*! if this returns false, NullRNG() can be passed to functions that take RandomNumberGenerator & */ - virtual bool IsProbabilistic() const =0; - - //! whether or not a non-recoverable message part can be signed - virtual bool AllowNonrecoverablePart() const =0; - - //! if this function returns true, during verification you must input the signature before the message, otherwise you can input it at anytime */ - virtual bool SignatureUpfront() const {return false;} - - //! whether you must input the recoverable part before the non-recoverable part during signing - virtual bool RecoverablePartFirst() const =0; -}; - -//! interface for accumulating messages to be signed or verified -/*! Only Update() should be called - on this class. No other functions inherited from HashTransformation should be called. -*/ -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE PK_MessageAccumulator : public HashTransformation -{ -public: - //! should not be called on PK_MessageAccumulator - unsigned int DigestSize() const - {throw NotImplemented("PK_MessageAccumulator: DigestSize() should not be called");} - //! should not be called on PK_MessageAccumulator - void TruncatedFinal(byte *digest, size_t digestSize) - {throw NotImplemented("PK_MessageAccumulator: TruncatedFinal() should not be called");} -}; - -//! interface for public-key signers - -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE PK_Signer : public PK_SignatureScheme, public PrivateKeyAlgorithm -{ -public: - //! create a new HashTransformation to accumulate the message to be signed - virtual PK_MessageAccumulator * NewSignatureAccumulator(RandomNumberGenerator &rng) const =0; - - virtual void InputRecoverableMessage(PK_MessageAccumulator &messageAccumulator, const byte *recoverableMessage, size_t recoverableMessageLength) const =0; - - //! sign and delete messageAccumulator (even in case of exception thrown) - /*! \pre size of signature == MaxSignatureLength() - \return actual signature length - */ - virtual size_t Sign(RandomNumberGenerator &rng, PK_MessageAccumulator *messageAccumulator, byte *signature) const; - - //! sign and restart messageAccumulator - /*! \pre size of signature == MaxSignatureLength() - \return actual signature length - */ - virtual size_t SignAndRestart(RandomNumberGenerator &rng, PK_MessageAccumulator &messageAccumulator, byte *signature, bool restart=true) const =0; - - //! sign a message - /*! \pre size of signature == MaxSignatureLength() - \return actual signature length - */ - virtual size_t SignMessage(RandomNumberGenerator &rng, const byte *message, size_t messageLen, byte *signature) const; - - //! sign a recoverable message - /*! \pre size of signature == MaxSignatureLength(recoverableMessageLength) - \return actual signature length - */ - virtual size_t SignMessageWithRecovery(RandomNumberGenerator &rng, const byte *recoverableMessage, size_t recoverableMessageLength, - const byte *nonrecoverableMessage, size_t nonrecoverableMessageLength, byte *signature) const; -}; - -//! interface for public-key signature verifiers -/*! The Recover* functions throw NotImplemented if the signature scheme does not support - message recovery. - The Verify* functions throw InvalidDataFormat if the scheme does support message - recovery and the signature contains a non-empty recoverable message part. The - Recovery* functions should be used in that case. -*/ -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE PK_Verifier : public PK_SignatureScheme, public PublicKeyAlgorithm -{ -public: - //! create a new HashTransformation to accumulate the message to be verified - virtual PK_MessageAccumulator * NewVerificationAccumulator() const =0; - - //! input signature into a message accumulator - virtual void InputSignature(PK_MessageAccumulator &messageAccumulator, const byte *signature, size_t signatureLength) const =0; - - //! check whether messageAccumulator contains a valid signature and message, and delete messageAccumulator (even in case of exception thrown) - virtual bool Verify(PK_MessageAccumulator *messageAccumulator) const; - - //! check whether messageAccumulator contains a valid signature and message, and restart messageAccumulator - virtual bool VerifyAndRestart(PK_MessageAccumulator &messageAccumulator) const =0; - - //! check whether input signature is a valid signature for input message - virtual bool VerifyMessage(const byte *message, size_t messageLen, - const byte *signature, size_t signatureLength) const; - - //! recover a message from its signature - /*! \pre size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength) - */ - virtual DecodingResult Recover(byte *recoveredMessage, PK_MessageAccumulator *messageAccumulator) const; - - //! recover a message from its signature - /*! \pre size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength) - */ - virtual DecodingResult RecoverAndRestart(byte *recoveredMessage, PK_MessageAccumulator &messageAccumulator) const =0; - - //! recover a message from its signature - /*! \pre size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength) - */ - virtual DecodingResult RecoverMessage(byte *recoveredMessage, - const byte *nonrecoverableMessage, size_t nonrecoverableMessageLength, - const byte *signature, size_t signatureLength) const; -}; - -//! interface for domains of simple key agreement protocols - -/*! A key agreement domain is a set of parameters that must be shared - by two parties in a key agreement protocol, along with the algorithms - for generating key pairs and deriving agreed values. -*/ -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE SimpleKeyAgreementDomain : public KeyAgreementAlgorithm -{ -public: - //! return length of agreed value produced - virtual unsigned int AgreedValueLength() const =0; - //! return length of private keys in this domain - virtual unsigned int PrivateKeyLength() const =0; - //! return length of public keys in this domain - virtual unsigned int PublicKeyLength() const =0; - //! generate private key - /*! \pre size of privateKey == PrivateKeyLength() */ - virtual void GeneratePrivateKey(RandomNumberGenerator &rng, byte *privateKey) const =0; - //! generate public key - /*! \pre size of publicKey == PublicKeyLength() */ - virtual void GeneratePublicKey(RandomNumberGenerator &rng, const byte *privateKey, byte *publicKey) const =0; - //! generate private/public key pair - /*! \note equivalent to calling GeneratePrivateKey() and then GeneratePublicKey() */ - virtual void GenerateKeyPair(RandomNumberGenerator &rng, byte *privateKey, byte *publicKey) const; - //! derive agreed value from your private key and couterparty's public key, return false in case of failure - /*! \note If you have previously validated the public key, use validateOtherPublicKey=false to save time. - \pre size of agreedValue == AgreedValueLength() - \pre length of privateKey == PrivateKeyLength() - \pre length of otherPublicKey == PublicKeyLength() - */ - virtual bool Agree(byte *agreedValue, const byte *privateKey, const byte *otherPublicKey, bool validateOtherPublicKey=true) const =0; - -#ifdef CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY - bool ValidateDomainParameters(RandomNumberGenerator &rng) const - {return GetCryptoParameters().Validate(rng, 2);} -#endif -}; - -//! interface for domains of authenticated key agreement protocols - -/*! In an authenticated key agreement protocol, each party has two - key pairs. The long-lived key pair is called the static key pair, - and the short-lived key pair is called the ephemeral key pair. -*/ -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE AuthenticatedKeyAgreementDomain : public KeyAgreementAlgorithm -{ -public: - //! return length of agreed value produced - virtual unsigned int AgreedValueLength() const =0; - - //! return length of static private keys in this domain - virtual unsigned int StaticPrivateKeyLength() const =0; - //! return length of static public keys in this domain - virtual unsigned int StaticPublicKeyLength() const =0; - //! generate static private key - /*! \pre size of privateKey == PrivateStaticKeyLength() */ - virtual void GenerateStaticPrivateKey(RandomNumberGenerator &rng, byte *privateKey) const =0; - //! generate static public key - /*! \pre size of publicKey == PublicStaticKeyLength() */ - virtual void GenerateStaticPublicKey(RandomNumberGenerator &rng, const byte *privateKey, byte *publicKey) const =0; - //! generate private/public key pair - /*! \note equivalent to calling GenerateStaticPrivateKey() and then GenerateStaticPublicKey() */ - virtual void GenerateStaticKeyPair(RandomNumberGenerator &rng, byte *privateKey, byte *publicKey) const; - - //! return length of ephemeral private keys in this domain - virtual unsigned int EphemeralPrivateKeyLength() const =0; - //! return length of ephemeral public keys in this domain - virtual unsigned int EphemeralPublicKeyLength() const =0; - //! generate ephemeral private key - /*! \pre size of privateKey == PrivateEphemeralKeyLength() */ - virtual void GenerateEphemeralPrivateKey(RandomNumberGenerator &rng, byte *privateKey) const =0; - //! generate ephemeral public key - /*! \pre size of publicKey == PublicEphemeralKeyLength() */ - virtual void GenerateEphemeralPublicKey(RandomNumberGenerator &rng, const byte *privateKey, byte *publicKey) const =0; - //! generate private/public key pair - /*! \note equivalent to calling GenerateEphemeralPrivateKey() and then GenerateEphemeralPublicKey() */ - virtual void GenerateEphemeralKeyPair(RandomNumberGenerator &rng, byte *privateKey, byte *publicKey) const; - - //! derive agreed value from your private keys and couterparty's public keys, return false in case of failure - /*! \note The ephemeral public key will always be validated. - If you have previously validated the static public key, use validateStaticOtherPublicKey=false to save time. - \pre size of agreedValue == AgreedValueLength() - \pre length of staticPrivateKey == StaticPrivateKeyLength() - \pre length of ephemeralPrivateKey == EphemeralPrivateKeyLength() - \pre length of staticOtherPublicKey == StaticPublicKeyLength() - \pre length of ephemeralOtherPublicKey == EphemeralPublicKeyLength() - */ - virtual bool Agree(byte *agreedValue, - const byte *staticPrivateKey, const byte *ephemeralPrivateKey, - const byte *staticOtherPublicKey, const byte *ephemeralOtherPublicKey, - bool validateStaticOtherPublicKey=true) const =0; - -#ifdef CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY - bool ValidateDomainParameters(RandomNumberGenerator &rng) const - {return GetCryptoParameters().Validate(rng, 2);} -#endif -}; - -// interface for password authenticated key agreement protocols, not implemented yet -#if 0 -//! interface for protocol sessions -/*! The methods should be called in the following order: - - InitializeSession(rng, parameters); // or call initialize method in derived class - while (true) - { - if (OutgoingMessageAvailable()) - { - length = GetOutgoingMessageLength(); - GetOutgoingMessage(message); - ; // send outgoing message - } - - if (LastMessageProcessed()) - break; - - ; // receive incoming message - ProcessIncomingMessage(message); - } - ; // call methods in derived class to obtain result of protocol session -*/ -class ProtocolSession -{ -public: - //! exception thrown when an invalid protocol message is processed - class ProtocolError : public Exception - { - public: - ProtocolError(ErrorType errorType, const std::string &s) : Exception(errorType, s) {} - }; - - //! exception thrown when a function is called unexpectedly - /*! for example calling ProcessIncomingMessage() when ProcessedLastMessage() == true */ - class UnexpectedMethodCall : public Exception - { - public: - UnexpectedMethodCall(const std::string &s) : Exception(OTHER_ERROR, s) {} - }; - - ProtocolSession() : m_rng(NULL), m_throwOnProtocolError(true), m_validState(false) {} - virtual ~ProtocolSession() {} - - virtual void InitializeSession(RandomNumberGenerator &rng, const NameValuePairs ¶meters) =0; - - bool GetThrowOnProtocolError() const {return m_throwOnProtocolError;} - void SetThrowOnProtocolError(bool throwOnProtocolError) {m_throwOnProtocolError = throwOnProtocolError;} - - bool HasValidState() const {return m_validState;} - - virtual bool OutgoingMessageAvailable() const =0; - virtual unsigned int GetOutgoingMessageLength() const =0; - virtual void GetOutgoingMessage(byte *message) =0; - - virtual bool LastMessageProcessed() const =0; - virtual void ProcessIncomingMessage(const byte *message, unsigned int messageLength) =0; - -protected: - void HandleProtocolError(Exception::ErrorType errorType, const std::string &s) const; - void CheckAndHandleInvalidState() const; - void SetValidState(bool valid) {m_validState = valid;} - - RandomNumberGenerator *m_rng; - -private: - bool m_throwOnProtocolError, m_validState; -}; - -class KeyAgreementSession : public ProtocolSession -{ -public: - virtual unsigned int GetAgreedValueLength() const =0; - virtual void GetAgreedValue(byte *agreedValue) const =0; -}; - -class PasswordAuthenticatedKeyAgreementSession : public KeyAgreementSession -{ -public: - void InitializePasswordAuthenticatedKeyAgreementSession(RandomNumberGenerator &rng, - const byte *myId, unsigned int myIdLength, - const byte *counterPartyId, unsigned int counterPartyIdLength, - const byte *passwordOrVerifier, unsigned int passwordOrVerifierLength); -}; - -class PasswordAuthenticatedKeyAgreementDomain : public KeyAgreementAlgorithm -{ -public: - //! return whether the domain parameters stored in this object are valid - virtual bool ValidateDomainParameters(RandomNumberGenerator &rng) const - {return GetCryptoParameters().Validate(rng, 2);} - - virtual unsigned int GetPasswordVerifierLength(const byte *password, unsigned int passwordLength) const =0; - virtual void GeneratePasswordVerifier(RandomNumberGenerator &rng, const byte *userId, unsigned int userIdLength, const byte *password, unsigned int passwordLength, byte *verifier) const =0; - - enum RoleFlags {CLIENT=1, SERVER=2, INITIATOR=4, RESPONDER=8}; - - virtual bool IsValidRole(unsigned int role) =0; - virtual PasswordAuthenticatedKeyAgreementSession * CreateProtocolSession(unsigned int role) const =0; -}; -#endif - -//! BER Decode Exception Class, may be thrown during an ASN1 BER decode operation -class CRYPTOPP_DLL BERDecodeErr : public InvalidArgument -{ -public: - BERDecodeErr() : InvalidArgument("BER decode error") {} - BERDecodeErr(const std::string &s) : InvalidArgument(s) {} -}; - -//! interface for encoding and decoding ASN1 objects -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE ASN1Object -{ -public: - virtual ~ASN1Object() {} - //! decode this object from a BufferedTransformation, using BER (Basic Encoding Rules) - virtual void BERDecode(BufferedTransformation &bt) =0; - //! encode this object into a BufferedTransformation, using DER (Distinguished Encoding Rules) - virtual void DEREncode(BufferedTransformation &bt) const =0; - //! encode this object into a BufferedTransformation, using BER - /*! this may be useful if DEREncode() would be too inefficient */ - virtual void BEREncode(BufferedTransformation &bt) const {DEREncode(bt);} -}; - -#ifdef CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY -typedef PK_SignatureScheme PK_SignatureSystem; -typedef SimpleKeyAgreementDomain PK_SimpleKeyAgreementDomain; -typedef AuthenticatedKeyAgreementDomain PK_AuthenticatedKeyAgreementDomain; -#endif - -NAMESPACE_END - -#endif |