/usr/include/crypto++/salsa.h is in libcrypto++-dev 5.6.1-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 | // salsa.h - written and placed in the public domain by Wei Dai
#ifndef CRYPTOPP_SALSA_H
#define CRYPTOPP_SALSA_H
#include "strciphr.h"
NAMESPACE_BEGIN(CryptoPP)
//! _
struct Salsa20_Info : public VariableKeyLength<32, 16, 32, 16, SimpleKeyingInterface::UNIQUE_IV, 8>
{
static const char *StaticAlgorithmName() {return "Salsa20";}
};
class CRYPTOPP_NO_VTABLE Salsa20_Policy : public AdditiveCipherConcretePolicy<word32, 16>
{
protected:
void CipherSetKey(const NameValuePairs ¶ms, const byte *key, size_t length);
void OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount);
void CipherResynchronize(byte *keystreamBuffer, const byte *IV, size_t length);
bool CipherIsRandomAccess() const {return true;}
void SeekToIteration(lword iterationCount);
#if CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X64
unsigned int GetAlignment() const;
unsigned int GetOptimalBlockSize() const;
#endif
FixedSizeAlignedSecBlock<word32, 16> m_state;
int m_rounds;
};
/// <a href="http://www.cryptolounge.org/wiki/Salsa20">Salsa20</a>, variable rounds: 8, 12 or 20 (default 20)
struct Salsa20 : public Salsa20_Info, public SymmetricCipherDocumentation
{
typedef SymmetricCipherFinal<ConcretePolicyHolder<Salsa20_Policy, AdditiveCipherTemplate<> >, Salsa20_Info> Encryption;
typedef Encryption Decryption;
};
//! _
struct XSalsa20_Info : public FixedKeyLength<32, SimpleKeyingInterface::UNIQUE_IV, 24>
{
static const char *StaticAlgorithmName() {return "XSalsa20";}
};
class CRYPTOPP_NO_VTABLE XSalsa20_Policy : public Salsa20_Policy
{
public:
void CipherSetKey(const NameValuePairs ¶ms, const byte *key, size_t length);
void CipherResynchronize(byte *keystreamBuffer, const byte *IV, size_t length);
protected:
FixedSizeSecBlock<word32, 8> m_key;
};
/// <a href="http://www.cryptolounge.org/wiki/XSalsa20">XSalsa20</a>, variable rounds: 8, 12 or 20 (default 20)
struct XSalsa20 : public XSalsa20_Info, public SymmetricCipherDocumentation
{
typedef SymmetricCipherFinal<ConcretePolicyHolder<XSalsa20_Policy, AdditiveCipherTemplate<> >, XSalsa20_Info> Encryption;
typedef Encryption Decryption;
};
NAMESPACE_END
#endif
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