Merge branch 'mbedtls'

Replace Crypto++ 5.6.2 with Mbed TLS 3.6.0

Newer compilers are starting to show the age of the crypto library we've
been using, as it is sometimes a pain to recompile compass lately.  So,
the tracked version of Crypto++ was at least due for an upgrade.

However, I plan to soon begin reimplementing compass in C.  So, I'm
taking this opportunity to first just migrate the cryptography library
to a newer C alternative.  This branch does so, and integrates its use
into the current C++ version of compass.

* mbedtls:
  Remove unnecessary exception handler catch block
  Refactor random password generation to use mbedtls entropy source
  Refactor SHA256 function to use mbedtls
  Refactor AES functions to use mbedtls
  Add Mbedtls library
  Remove Crypto++ library

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 &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