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Diffstat (limited to 'embeddedcryptopp/strciphr.h')
| -rw-r--r-- | embeddedcryptopp/strciphr.h | 306 |
1 files changed, 0 insertions, 306 deletions
diff --git a/embeddedcryptopp/strciphr.h b/embeddedcryptopp/strciphr.h deleted file mode 100644 index d1d11a1..0000000 --- a/embeddedcryptopp/strciphr.h +++ /dev/null @@ -1,306 +0,0 @@ -/*! \file - This file contains helper classes for implementing stream ciphers. - - All this infrastructure may look very complex compared to what's in Crypto++ 4.x, - but stream ciphers implementations now support a lot of new functionality, - including better performance (minimizing copying), resetting of keys and IVs, and methods to - query which features are supported by a cipher. - - Here's an explanation of these classes. The word "policy" is used here to mean a class with a - set of methods that must be implemented by individual stream cipher implementations. - This is usually much simpler than the full stream cipher API, which is implemented by - either AdditiveCipherTemplate or CFB_CipherTemplate using the policy. So for example, an - implementation of SEAL only needs to implement the AdditiveCipherAbstractPolicy interface - (since it's an additive cipher, i.e., it xors a keystream into the plaintext). - See this line in seal.h: - - typedef SymmetricCipherFinal\<ConcretePolicyHolder\<SEAL_Policy\<B\>, AdditiveCipherTemplate\<\> \> \> Encryption; - - AdditiveCipherTemplate and CFB_CipherTemplate are designed so that they don't need - to take a policy class as a template parameter (although this is allowed), so that - their code is not duplicated for each new cipher. Instead they each - get a reference to an abstract policy interface by calling AccessPolicy() on itself, so - AccessPolicy() must be overriden to return the actual policy reference. This is done - by the ConceretePolicyHolder class. Finally, SymmetricCipherFinal implements the constructors and - other functions that must be implemented by the most derived class. -*/ - -#ifndef CRYPTOPP_STRCIPHR_H -#define CRYPTOPP_STRCIPHR_H - -#include "seckey.h" -#include "secblock.h" -#include "argnames.h" - -NAMESPACE_BEGIN(CryptoPP) - -template <class POLICY_INTERFACE, class BASE = Empty> -class CRYPTOPP_NO_VTABLE AbstractPolicyHolder : public BASE -{ -public: - typedef POLICY_INTERFACE PolicyInterface; - virtual ~AbstractPolicyHolder() {} - -protected: - virtual const POLICY_INTERFACE & GetPolicy() const =0; - virtual POLICY_INTERFACE & AccessPolicy() =0; -}; - -template <class POLICY, class BASE, class POLICY_INTERFACE = CPP_TYPENAME BASE::PolicyInterface> -class ConcretePolicyHolder : public BASE, protected POLICY -{ -protected: - const POLICY_INTERFACE & GetPolicy() const {return *this;} - POLICY_INTERFACE & AccessPolicy() {return *this;} -}; - -enum KeystreamOperationFlags {OUTPUT_ALIGNED=1, INPUT_ALIGNED=2, INPUT_NULL = 4}; -enum KeystreamOperation { - WRITE_KEYSTREAM = INPUT_NULL, - WRITE_KEYSTREAM_ALIGNED = INPUT_NULL | OUTPUT_ALIGNED, - XOR_KEYSTREAM = 0, - XOR_KEYSTREAM_INPUT_ALIGNED = INPUT_ALIGNED, - XOR_KEYSTREAM_OUTPUT_ALIGNED= OUTPUT_ALIGNED, - XOR_KEYSTREAM_BOTH_ALIGNED = OUTPUT_ALIGNED | INPUT_ALIGNED}; - -struct CRYPTOPP_DLL CRYPTOPP_NO_VTABLE AdditiveCipherAbstractPolicy -{ - virtual ~AdditiveCipherAbstractPolicy() {} - virtual unsigned int GetAlignment() const {return 1;} - virtual unsigned int GetBytesPerIteration() const =0; - virtual unsigned int GetOptimalBlockSize() const {return GetBytesPerIteration();} - virtual unsigned int GetIterationsToBuffer() const =0; - virtual void WriteKeystream(byte *keystream, size_t iterationCount) - {OperateKeystream(KeystreamOperation(INPUT_NULL | (KeystreamOperationFlags)IsAlignedOn(keystream, GetAlignment())), keystream, NULL, iterationCount);} - virtual bool CanOperateKeystream() const {return false;} - virtual void OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount) {assert(false);} - virtual void CipherSetKey(const NameValuePairs ¶ms, const byte *key, size_t length) =0; - virtual void CipherResynchronize(byte *keystreamBuffer, const byte *iv, size_t length) {throw NotImplemented("SimpleKeyingInterface: this object doesn't support resynchronization");} - virtual bool CipherIsRandomAccess() const =0; - virtual void SeekToIteration(lword iterationCount) {assert(!CipherIsRandomAccess()); throw NotImplemented("StreamTransformation: this object doesn't support random access");} -}; - -template <typename WT, unsigned int W, unsigned int X = 1, class BASE = AdditiveCipherAbstractPolicy> -struct CRYPTOPP_NO_VTABLE AdditiveCipherConcretePolicy : public BASE -{ - typedef WT WordType; - CRYPTOPP_CONSTANT(BYTES_PER_ITERATION = sizeof(WordType) * W) - -#if !(CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X64) - unsigned int GetAlignment() const {return GetAlignmentOf<WordType>();} -#endif - unsigned int GetBytesPerIteration() const {return BYTES_PER_ITERATION;} - unsigned int GetIterationsToBuffer() const {return X;} - bool CanOperateKeystream() const {return true;} - virtual void OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount) =0; -}; - -// use these to implement OperateKeystream -#define CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, b, i, a) \ - PutWord(bool(x & OUTPUT_ALIGNED), b, output+i*sizeof(WordType), (x & INPUT_NULL) ? a : a ^ GetWord<WordType>(bool(x & INPUT_ALIGNED), b, input+i*sizeof(WordType))); -#define CRYPTOPP_KEYSTREAM_OUTPUT_XMM(x, i, a) {\ - __m128i t = (x & INPUT_NULL) ? a : _mm_xor_si128(a, (x & INPUT_ALIGNED) ? _mm_load_si128((__m128i *)input+i) : _mm_loadu_si128((__m128i *)input+i));\ - if (x & OUTPUT_ALIGNED) _mm_store_si128((__m128i *)output+i, t);\ - else _mm_storeu_si128((__m128i *)output+i, t);} -#define CRYPTOPP_KEYSTREAM_OUTPUT_SWITCH(x, y) \ - switch (operation) \ - { \ - case WRITE_KEYSTREAM: \ - x(WRITE_KEYSTREAM) \ - break; \ - case XOR_KEYSTREAM: \ - x(XOR_KEYSTREAM) \ - input += y; \ - break; \ - case XOR_KEYSTREAM_INPUT_ALIGNED: \ - x(XOR_KEYSTREAM_INPUT_ALIGNED) \ - input += y; \ - break; \ - case XOR_KEYSTREAM_OUTPUT_ALIGNED: \ - x(XOR_KEYSTREAM_OUTPUT_ALIGNED) \ - input += y; \ - break; \ - case WRITE_KEYSTREAM_ALIGNED: \ - x(WRITE_KEYSTREAM_ALIGNED) \ - break; \ - case XOR_KEYSTREAM_BOTH_ALIGNED: \ - x(XOR_KEYSTREAM_BOTH_ALIGNED) \ - input += y; \ - break; \ - } \ - output += y; - -template <class BASE = AbstractPolicyHolder<AdditiveCipherAbstractPolicy, SymmetricCipher> > -class CRYPTOPP_NO_VTABLE AdditiveCipherTemplate : public BASE, public RandomNumberGenerator -{ -public: - void GenerateBlock(byte *output, size_t size); - void ProcessData(byte *outString, const byte *inString, size_t length); - void Resynchronize(const byte *iv, int length=-1); - unsigned int OptimalBlockSize() const {return this->GetPolicy().GetOptimalBlockSize();} - unsigned int GetOptimalNextBlockSize() const {return (unsigned int)this->m_leftOver;} - unsigned int OptimalDataAlignment() const {return this->GetPolicy().GetAlignment();} - bool IsSelfInverting() const {return true;} - bool IsForwardTransformation() const {return true;} - bool IsRandomAccess() const {return this->GetPolicy().CipherIsRandomAccess();} - void Seek(lword position); - - typedef typename BASE::PolicyInterface PolicyInterface; - -protected: - void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs ¶ms); - - unsigned int GetBufferByteSize(const PolicyInterface &policy) const {return policy.GetBytesPerIteration() * policy.GetIterationsToBuffer();} - - inline byte * KeystreamBufferBegin() {return this->m_buffer.data();} - inline byte * KeystreamBufferEnd() {return (this->m_buffer.data() + this->m_buffer.size());} - - SecByteBlock m_buffer; - size_t m_leftOver; -}; - -class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE CFB_CipherAbstractPolicy -{ -public: - virtual ~CFB_CipherAbstractPolicy() {} - virtual unsigned int GetAlignment() const =0; - virtual unsigned int GetBytesPerIteration() const =0; - virtual byte * GetRegisterBegin() =0; - virtual void TransformRegister() =0; - virtual bool CanIterate() const {return false;} - virtual void Iterate(byte *output, const byte *input, CipherDir dir, size_t iterationCount) {assert(false); throw 0;} - virtual void CipherSetKey(const NameValuePairs ¶ms, const byte *key, size_t length) =0; - virtual void CipherResynchronize(const byte *iv, size_t length) {throw NotImplemented("SimpleKeyingInterface: this object doesn't support resynchronization");} -}; - -template <typename WT, unsigned int W, class BASE = CFB_CipherAbstractPolicy> -struct CRYPTOPP_NO_VTABLE CFB_CipherConcretePolicy : public BASE -{ - typedef WT WordType; - - unsigned int GetAlignment() const {return sizeof(WordType);} - unsigned int GetBytesPerIteration() const {return sizeof(WordType) * W;} - bool CanIterate() const {return true;} - void TransformRegister() {this->Iterate(NULL, NULL, ENCRYPTION, 1);} - - template <class B> - struct RegisterOutput - { - RegisterOutput(byte *output, const byte *input, CipherDir dir) - : m_output(output), m_input(input), m_dir(dir) {} - - inline RegisterOutput& operator()(WordType ®isterWord) - { - assert(IsAligned<WordType>(m_output)); - assert(IsAligned<WordType>(m_input)); - - if (!NativeByteOrderIs(B::ToEnum())) - registerWord = ByteReverse(registerWord); - - if (m_dir == ENCRYPTION) - { - if (m_input == NULL) - assert(m_output == NULL); - else - { - WordType ct = *(const WordType *)m_input ^ registerWord; - registerWord = ct; - *(WordType*)m_output = ct; - m_input += sizeof(WordType); - m_output += sizeof(WordType); - } - } - else - { - WordType ct = *(const WordType *)m_input; - *(WordType*)m_output = registerWord ^ ct; - registerWord = ct; - m_input += sizeof(WordType); - m_output += sizeof(WordType); - } - - // registerWord is left unreversed so it can be xor-ed with further input - - return *this; - } - - byte *m_output; - const byte *m_input; - CipherDir m_dir; - }; -}; - -template <class BASE> -class CRYPTOPP_NO_VTABLE CFB_CipherTemplate : public BASE -{ -public: - void ProcessData(byte *outString, const byte *inString, size_t length); - void Resynchronize(const byte *iv, int length=-1); - unsigned int OptimalBlockSize() const {return this->GetPolicy().GetBytesPerIteration();} - unsigned int GetOptimalNextBlockSize() const {return (unsigned int)m_leftOver;} - unsigned int OptimalDataAlignment() const {return this->GetPolicy().GetAlignment();} - bool IsRandomAccess() const {return false;} - bool IsSelfInverting() const {return false;} - - typedef typename BASE::PolicyInterface PolicyInterface; - -protected: - virtual void CombineMessageAndShiftRegister(byte *output, byte *reg, const byte *message, size_t length) =0; - - void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs ¶ms); - - size_t m_leftOver; -}; - -template <class BASE = AbstractPolicyHolder<CFB_CipherAbstractPolicy, SymmetricCipher> > -class CRYPTOPP_NO_VTABLE CFB_EncryptionTemplate : public CFB_CipherTemplate<BASE> -{ - bool IsForwardTransformation() const {return true;} - void CombineMessageAndShiftRegister(byte *output, byte *reg, const byte *message, size_t length); -}; - -template <class BASE = AbstractPolicyHolder<CFB_CipherAbstractPolicy, SymmetricCipher> > -class CRYPTOPP_NO_VTABLE CFB_DecryptionTemplate : public CFB_CipherTemplate<BASE> -{ - bool IsForwardTransformation() const {return false;} - void CombineMessageAndShiftRegister(byte *output, byte *reg, const byte *message, size_t length); -}; - -template <class BASE> -class CFB_RequireFullDataBlocks : public BASE -{ -public: - unsigned int MandatoryBlockSize() const {return this->OptimalBlockSize();} -}; - -//! _ -template <class BASE, class INFO = BASE> -class SymmetricCipherFinal : public AlgorithmImpl<SimpleKeyingInterfaceImpl<BASE, INFO>, INFO> -{ -public: - SymmetricCipherFinal() {} - SymmetricCipherFinal(const byte *key) - {this->SetKey(key, this->DEFAULT_KEYLENGTH);} - SymmetricCipherFinal(const byte *key, size_t length) - {this->SetKey(key, length);} - SymmetricCipherFinal(const byte *key, size_t length, const byte *iv) - {this->SetKeyWithIV(key, length, iv);} - - Clonable * Clone() const {return static_cast<SymmetricCipher *>(new SymmetricCipherFinal<BASE, INFO>(*this));} -}; - -NAMESPACE_END - -#ifdef CRYPTOPP_MANUALLY_INSTANTIATE_TEMPLATES -#include "strciphr.cpp" -#endif - -NAMESPACE_BEGIN(CryptoPP) -CRYPTOPP_DLL_TEMPLATE_CLASS AbstractPolicyHolder<AdditiveCipherAbstractPolicy, SymmetricCipher>; -CRYPTOPP_DLL_TEMPLATE_CLASS AdditiveCipherTemplate<AbstractPolicyHolder<AdditiveCipherAbstractPolicy, SymmetricCipher> >; -CRYPTOPP_DLL_TEMPLATE_CLASS CFB_CipherTemplate<AbstractPolicyHolder<CFB_CipherAbstractPolicy, SymmetricCipher> >; -CRYPTOPP_DLL_TEMPLATE_CLASS CFB_EncryptionTemplate<AbstractPolicyHolder<CFB_CipherAbstractPolicy, SymmetricCipher> >; -CRYPTOPP_DLL_TEMPLATE_CLASS CFB_DecryptionTemplate<AbstractPolicyHolder<CFB_CipherAbstractPolicy, SymmetricCipher> >; -NAMESPACE_END - -#endif |