hash.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
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 * License, v. 2.0. If a copy of the MPL was not distributed with this
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 */

#ifndef INCLUDED_COMPHELPER_HASH_HXX
#define INCLUDED_COMPHELPER_HASH_HXX

#include <comphelper/comphelperdllapi.h>
#include <rtl/digest.h>

#include <memory>
#include <vector>

namespace rtl {
    class OUString;
}

namespace comphelper {

enum class HashType
{
    MD5,
    SHA1,
    SHA256,
    SHA512
};

const sal_uInt32 MD5_HASH_LENGTH = RTL_DIGEST_LENGTH_MD5;
const sal_uInt32 SHA1_HASH_LENGTH = RTL_DIGEST_LENGTH_SHA1;
const sal_uInt32 SHA256_HASH_LENGTH = 32;
const sal_uInt32 SHA512_HASH_LENGTH = 64;

struct HashImpl;

class COMPHELPER_DLLPUBLIC Hash
{
private:
    std::unique_ptr<HashImpl> mpImpl;

public:

    enum class IterCount
    {
        NONE,       
        PREPEND,    
        APPEND      
    };

    Hash(HashType eType);
    ~Hash();

    void update(const unsigned char* pInput, size_t length);

    std::vector<unsigned char> finalize();

    static std::vector<unsigned char> calculateHash(const unsigned char* pInput, size_t length, HashType eType);

    static std::vector<unsigned char> calculateHash(
            const unsigned char* pInput, size_t nLength,
            const unsigned char* pSalt, size_t nSaltLen,
            sal_uInt32 nSpinCount,
            IterCount eIterCount,
            HashType eType);

    static std::vector<unsigned char> calculateHash(
            const rtl::OUString& rPassword,
            const std::vector<unsigned char>& rSaltValue,
            sal_uInt32 nSpinCount,
            IterCount eIterCount,
            HashType eType);

    size_t getLength() const;
};

}

#endif // INCLUDED_COMPHELPER_HASH_HXX

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