scrypt.h

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// scrypt.h - written and placed in public domain by Jeffrey Walton.
//            Based on reference source code by Colin Percival.
 
 
#ifndef CRYPTOPP_SCRYPT_H
#define CRYPTOPP_SCRYPT_H
 
#include "cryptlib.h"
#include "secblock.h"
 
NAMESPACE_BEGIN(CryptoPP)
 
 
class Scrypt : public KeyDerivationFunction
{
public:
    virtual ~Scrypt() {}
 
    static std::string StaticAlgorithmName () {
        return "scrypt";
    }
 
    // KeyDerivationFunction interface
    std::string AlgorithmName() const {
        return StaticAlgorithmName();
    }
 
    // KeyDerivationFunction interface
    size_t MaxDerivedKeyLength() const {
        return static_cast<size_t>(0)-1;
    }
 
    // KeyDerivationFunction interface
    size_t GetValidDerivedLength(size_t keylength) const;
 
    // KeyDerivationFunction interface
    size_t DeriveKey(byte *derived, size_t derivedLen, const byte *secret, size_t secretLen,
        const NameValuePairs& params) const;
 
    size_t DeriveKey(byte *derived, size_t derivedLen, const byte *secret, size_t secretLen,
        const byte *salt, size_t saltLen, word64 cost=2, word64 blockSize=8, word64 parallelization=1) const;
 
protected:
    enum {defaultCost=2, defaultBlockSize=8, defaultParallelization=1};
 
    // KeyDerivationFunction interface
    const Algorithm & GetAlgorithm() const {
        return *this;
    }
 
    inline void ValidateParameters(size_t derivedlen, word64 cost, word64 blockSize, word64 parallelization) const;
};
 
NAMESPACE_END
 
#endif // CRYPTOPP_SCRYPT_H