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author | Malfurious <m@lfurio.us> | 2024-10-21 11:09:00 -0400 |
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committer | Malfurious <m@lfurio.us> | 2024-10-24 06:41:41 -0400 |
commit | 5494fc310acf0aabb9d828451331e44483eb21c7 (patch) | |
tree | 77280a586d52470fca89b9ed73f5f1faaf7907c6 /cryptopp562/oaep.cpp | |
parent | 428471d39fb8c205a9fad899c88c30a2cb7df685 (diff) | |
download | compass-5494fc310acf0aabb9d828451331e44483eb21c7.tar.gz compass-5494fc310acf0aabb9d828451331e44483eb21c7.zip |
Remove Crypto++ library
The tracked version of Crypto++ is going on 10 years old and doesn't
always compile properly on modern tooling.
This removes the entire subdirectory as well as references to files in
the build script. Due to the number of files touched by this commit, I
opt to add its replacement in the next commit.
Signed-off-by: Malfurious <m@lfurio.us>
Diffstat (limited to '')
-rw-r--r-- | cryptopp562/oaep.cpp | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/cryptopp562/oaep.cpp b/cryptopp562/oaep.cpp deleted file mode 100644 index 1d474be..0000000 --- a/cryptopp562/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 ¶meters) 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 ¶meters) 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 |