remove oaep

2005-01-14 13:19:56 +00:00
parent 5c79ac4196
commit 87b65e5f8a
2 changed files with 0 additions and 132 deletions
@@ -1,107 +0,0 @@
-// oaep.cpp - written and placed in the public domain by Wei Dai
-
-#include "pch.h"
-#include "oaep.h"
-
-#include <functional>
-
-NAMESPACE_BEGIN(CryptoPP)
-
-// ********************************************************
-
-ANONYMOUS_NAMESPACE_BEGIN
-	template <class H, byte *P, unsigned int PLen>
-	struct PHashComputation
-	{
-		PHashComputation()	{H().CalculateDigest(pHash, P, PLen);}
-		byte pHash[H::DIGESTSIZE];
-	};
-
-	template <class H, byte *P, unsigned int PLen>
-	const byte *PHash()
-	{
-		static PHashComputation<H,P,PLen> pHash;
-		return pHash.pHash;
-	}
-NAMESPACE_END
-
-template <class H, class MGF, byte *P, unsigned int PLen>
-unsigned int OAEP<H,MGF,P,PLen>::MaxUnpaddedLength(unsigned int paddedLength) const
-{
-	return paddedLength/8 > 1+2*H::DIGESTSIZE ? paddedLength/8-1-2*H::DIGESTSIZE : 0;
-}
-
-template <class H, class MGF, byte *P, unsigned int PLen>
-void OAEP<H,MGF,P,PLen>::Pad(RandomNumberGenerator &rng, const byte *input, unsigned int inputLength, byte *oaepBlock, unsigned int oaepBlockLen) const
-{
-	assert (inputLength <= MaxUnpaddedLength(oaepBlockLen));
-
-	// convert from bit length to byte length
-	if (oaepBlockLen % 8 != 0)
-	{
-		oaepBlock[0] = 0;
-		oaepBlock++;
-	}
-	oaepBlockLen /= 8;
-
-	const unsigned int hLen = H::DIGESTSIZE;
-	const unsigned int seedLen = hLen, dbLen = oaepBlockLen-seedLen;
-	byte *const maskedSeed = oaepBlock;
-	byte *const maskedDB = oaepBlock+seedLen;
-
-	// DB = pHash || 00 ... || 01 || M
-	memcpy(maskedDB, PHash<H,P,PLen>(), hLen);
-	memset(maskedDB+hLen, 0, dbLen-hLen-inputLength-1);
-	maskedDB[dbLen-inputLength-1] = 0x01;
-	memcpy(maskedDB+dbLen-inputLength, input, inputLength);
-
-	rng.GenerateBlock(maskedSeed, seedLen);
-	H h;
-	MGF mgf;
-	mgf.GenerateAndMask(h, maskedDB, dbLen, maskedSeed, seedLen);
-	mgf.GenerateAndMask(h, maskedSeed, seedLen, maskedDB, dbLen);
-}
-
-template <class H, class MGF, byte *P, unsigned int PLen>
-DecodingResult OAEP<H,MGF,P,PLen>::Unpad(const byte *oaepBlock, unsigned int oaepBlockLen, byte *output) const
-{
-	bool invalid = false;
-
-	// convert from bit length to byte length
-	if (oaepBlockLen % 8 != 0)
-	{
-		invalid = (oaepBlock[0] != 0) || invalid;
-		oaepBlock++;
-	}
-	oaepBlockLen /= 8;
-
-	const unsigned int hLen = H::DIGESTSIZE;
-	const unsigned int seedLen = hLen, dbLen = oaepBlockLen-seedLen;
-
-	invalid = (oaepBlockLen < 2*hLen+1) || invalid;
-
-	SecByteBlock t(oaepBlock, oaepBlockLen);
-	byte *const maskedSeed = t;
-	byte *const maskedDB = t+seedLen;
-
-	H h;
-	MGF mgf;
-	mgf.GenerateAndMask(h, maskedSeed, seedLen, maskedDB, dbLen);
-	mgf.GenerateAndMask(h, maskedDB, dbLen, maskedSeed, seedLen);
-
-	// DB = pHash' || 00 ... || 01 || M
-
-	byte *M = std::find(maskedDB+hLen, maskedDB+dbLen, 0x01);
-	invalid = (M == maskedDB+dbLen) || invalid;
-	invalid = (std::find_if(maskedDB+hLen, M, std::bind2nd(std::not_equal_to<byte>(), 0)) != M) || invalid;
-	invalid = (memcmp(maskedDB, PHash<H,P,PLen>(), hLen) != 0) || invalid;
-
-	if (invalid)
-		return DecodingResult();
-
-	M++;
-	memcpy(output, M, maskedDB+dbLen-M);
-	return DecodingResult(maskedDB+dbLen-M);
-}
-
-NAMESPACE_END
@@ -1,25 +0,0 @@
-#ifndef CRYPTOPP_OAEP_H
-#define CRYPTOPP_OAEP_H
-
-#include "pubkey.h"
-
-NAMESPACE_BEGIN(CryptoPP)
-
-extern byte OAEP_P_DEFAULT[];	// defined in misc.cpp
-
-/// <a href="http://www.weidai.com/scan-mirror/ca.html#cem_OAEP-MGF1">EME-OAEP</a>, for use with RSAES
-template <class H, class MGF=P1363_MGF1, byte *P=OAEP_P_DEFAULT, unsigned int PLen=0>
-class OAEP : public PK_EncryptionMessageEncodingMethod, public EncryptionStandard
-{
-public:
-	static std::string StaticAlgorithmName() {return std::string("OAEP-") + MGF::StaticAlgorithmName() + "(" + H::StaticAlgorithmName() + ")";}
-	typedef OAEP<H, MGF, P, PLen> EncryptionMessageEncodingMethod;
-
-	unsigned int MaxUnpaddedLength(unsigned int paddedLength) const;
-	void Pad(RandomNumberGenerator &rng, const byte *raw, unsigned int inputLength, byte *padded, unsigned int paddedLength) const;
-	DecodingResult Unpad(const byte *padded, unsigned int paddedLength, byte *raw) const;
-};
-
-NAMESPACE_END
-
-#endif