/usr/include/crypto++/lubyrack.h is in libcrypto++-dev 5.6.1-5build1.
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 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 | // lubyrack.h - written and placed in the public domain by Wei Dai
#ifndef CRYPTOPP_LUBYRACK_H
#define CRYPTOPP_LUBYRACK_H
/** \file */
#include "simple.h"
#include "secblock.h"
NAMESPACE_BEGIN(CryptoPP)
template <class T> struct DigestSizeDoubleWorkaround // VC60 workaround
{
CRYPTOPP_CONSTANT(RESULT = 2*T::DIGESTSIZE)
};
//! algorithm info
template <class T>
struct LR_Info : public VariableKeyLength<16, 0, 2*(INT_MAX/2), 2>, public FixedBlockSize<DigestSizeDoubleWorkaround<T>::RESULT>
{
static std::string StaticAlgorithmName() {return std::string("LR/")+T::StaticAlgorithmName();}
};
//! Luby-Rackoff
template <class T>
class LR : public LR_Info<T>, public BlockCipherDocumentation
{
class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<LR_Info<T> >
{
public:
// VC60 workaround: have to define these functions within class definition
void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms)
{
this->AssertValidKeyLength(length);
L = length/2;
buffer.New(2*S);
digest.New(S);
key.Assign(userKey, 2*L);
}
protected:
CRYPTOPP_CONSTANT(S=T::DIGESTSIZE)
unsigned int L; // key length / 2
SecByteBlock key;
mutable T hm;
mutable SecByteBlock buffer, digest;
};
class CRYPTOPP_NO_VTABLE Enc : public Base
{
public:
#define KL this->key
#define KR this->key+this->L
#define BL this->buffer
#define BR this->buffer+this->S
#define IL inBlock
#define IR inBlock+this->S
#define OL outBlock
#define OR outBlock+this->S
void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
{
this->hm.Update(KL, this->L);
this->hm.Update(IL, this->S);
this->hm.Final(BR);
xorbuf(BR, IR, this->S);
this->hm.Update(KR, this->L);
this->hm.Update(BR, this->S);
this->hm.Final(BL);
xorbuf(BL, IL, this->S);
this->hm.Update(KL, this->L);
this->hm.Update(BL, this->S);
this->hm.Final(this->digest);
xorbuf(BR, this->digest, this->S);
this->hm.Update(KR, this->L);
this->hm.Update(OR, this->S);
this->hm.Final(this->digest);
xorbuf(BL, this->digest, this->S);
if (xorBlock)
xorbuf(outBlock, xorBlock, this->buffer, 2*this->S);
else
memcpy_s(outBlock, 2*this->S, this->buffer, 2*this->S);
}
};
class CRYPTOPP_NO_VTABLE Dec : public Base
{
public:
void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
{
this->hm.Update(KR, this->L);
this->hm.Update(IR, this->S);
this->hm.Final(BL);
xorbuf(BL, IL, this->S);
this->hm.Update(KL, this->L);
this->hm.Update(BL, this->S);
this->hm.Final(BR);
xorbuf(BR, IR, this->S);
this->hm.Update(KR, this->L);
this->hm.Update(BR, this->S);
this->hm.Final(this->digest);
xorbuf(BL, this->digest, this->S);
this->hm.Update(KL, this->L);
this->hm.Update(OL, this->S);
this->hm.Final(this->digest);
xorbuf(BR, this->digest, this->S);
if (xorBlock)
xorbuf(outBlock, xorBlock, this->buffer, 2*this->S);
else
memcpy(outBlock, this->buffer, 2*this->S);
}
#undef KL
#undef KR
#undef BL
#undef BR
#undef IL
#undef IR
#undef OL
#undef OR
};
public:
typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
};
NAMESPACE_END
#endif
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