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authormadmaxoft <github@xoft.cz>2014-01-22 22:26:40 +0100
committermadmaxoft <github@xoft.cz>2014-01-22 22:26:40 +0100
commit34f13d589a2ebbcae9230732c7a763b3cdd88b41 (patch)
tree4f7bad4f90ca8f7a896d83951804f0207082cafb /lib/cryptopp/oaep.cpp
parentReplacing CryptoPP with PolarSSL. (diff)
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Diffstat (limited to 'lib/cryptopp/oaep.cpp')
-rw-r--r--lib/cryptopp/oaep.cpp97
1 files changed, 0 insertions, 97 deletions
diff --git a/lib/cryptopp/oaep.cpp b/lib/cryptopp/oaep.cpp
deleted file mode 100644
index 1d474be52..000000000
--- a/lib/cryptopp/oaep.cpp
+++ /dev/null
@@ -1,97 +0,0 @@
-// oaep.cpp - written and placed in the public domain by Wei Dai
-
-#include "pch.h"
-
-#ifndef CRYPTOPP_IMPORTS
-
-#include "oaep.h"
-#include <functional>
-
-NAMESPACE_BEGIN(CryptoPP)
-
-// ********************************************************
-
-size_t OAEP_Base::MaxUnpaddedLength(size_t paddedLength) const
-{
- return SaturatingSubtract(paddedLength/8, 1+2*DigestSize());
-}
-
-void OAEP_Base::Pad(RandomNumberGenerator &rng, const byte *input, size_t inputLength, byte *oaepBlock, size_t oaepBlockLen, const NameValuePairs &parameters) const
-{
- assert (inputLength <= MaxUnpaddedLength(oaepBlockLen));
-
- // convert from bit length to byte length
- if (oaepBlockLen % 8 != 0)
- {
- oaepBlock[0] = 0;
- oaepBlock++;
- }
- oaepBlockLen /= 8;
-
- std::auto_ptr<HashTransformation> pHash(NewHash());
- const size_t hLen = pHash->DigestSize();
- const size_t seedLen = hLen, dbLen = oaepBlockLen-seedLen;
- byte *const maskedSeed = oaepBlock;
- byte *const maskedDB = oaepBlock+seedLen;
-
- ConstByteArrayParameter encodingParameters;
- parameters.GetValue(Name::EncodingParameters(), encodingParameters);
-
- // DB = pHash || 00 ... || 01 || M
- pHash->CalculateDigest(maskedDB, encodingParameters.begin(), encodingParameters.size());
- memset(maskedDB+hLen, 0, dbLen-hLen-inputLength-1);
- maskedDB[dbLen-inputLength-1] = 0x01;
- memcpy(maskedDB+dbLen-inputLength, input, inputLength);
-
- rng.GenerateBlock(maskedSeed, seedLen);
- std::auto_ptr<MaskGeneratingFunction> pMGF(NewMGF());
- pMGF->GenerateAndMask(*pHash, maskedDB, dbLen, maskedSeed, seedLen);
- pMGF->GenerateAndMask(*pHash, maskedSeed, seedLen, maskedDB, dbLen);
-}
-
-DecodingResult OAEP_Base::Unpad(const byte *oaepBlock, size_t oaepBlockLen, byte *output, const NameValuePairs &parameters) const
-{
- bool invalid = false;
-
- // convert from bit length to byte length
- if (oaepBlockLen % 8 != 0)
- {
- invalid = (oaepBlock[0] != 0) || invalid;
- oaepBlock++;
- }
- oaepBlockLen /= 8;
-
- std::auto_ptr<HashTransformation> pHash(NewHash());
- const size_t hLen = pHash->DigestSize();
- const size_t seedLen = hLen, dbLen = oaepBlockLen-seedLen;
-
- invalid = (oaepBlockLen < 2*hLen+1) || invalid;
-
- SecByteBlock t(oaepBlock, oaepBlockLen);
- byte *const maskedSeed = t;
- byte *const maskedDB = t+seedLen;
-
- std::auto_ptr<MaskGeneratingFunction> pMGF(NewMGF());
- pMGF->GenerateAndMask(*pHash, maskedSeed, seedLen, maskedDB, dbLen);
- pMGF->GenerateAndMask(*pHash, maskedDB, dbLen, maskedSeed, seedLen);
-
- ConstByteArrayParameter encodingParameters;
- parameters.GetValue(Name::EncodingParameters(), encodingParameters);
-
- // 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 = !pHash->VerifyDigest(maskedDB, encodingParameters.begin(), encodingParameters.size()) || invalid;
-
- if (invalid)
- return DecodingResult();
-
- M++;
- memcpy(output, M, maskedDB+dbLen-M);
- return DecodingResult(maskedDB+dbLen-M);
-}
-
-NAMESPACE_END
-
-#endif