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, 177 deletions

diff --git a/cryptopp562/square.cpp b/cryptopp562/square.cpp
deleted file mode 100644
index 00e6bdd..0000000
--- a/cryptopp562/square.cpp
+++ /dev/null
@@ -1,177 +0,0 @@
-// square.cpp - written and placed in the public domain by Wei Dai
-// Based on Paulo S.L.M. Barreto's public domain implementation
-
-#include "pch.h"
-#include "square.h"
-#include "misc.h"
-#include "gf256.h"
-
-NAMESPACE_BEGIN(CryptoPP)
-
-// apply theta to a roundkey
-static void SquareTransform (word32 in[4], word32 out[4])
-{
-	static const byte G[4][4] = 
-	{
-		0x02U, 0x01U, 0x01U, 0x03U, 
-		0x03U, 0x02U, 0x01U, 0x01U, 
-		0x01U, 0x03U, 0x02U, 0x01U, 
-		0x01U, 0x01U, 0x03U, 0x02U
-	};
-
-	GF256 gf256(0xf5);
-
-	for (int i = 0; i < 4; i++)
-	{
-		word32 temp = 0;
-		for (int j = 0; j < 4; j++)
-			for (int k = 0; k < 4; k++)
-				temp ^= (word32)gf256.Multiply(GETBYTE(in[i], 3-k), G[k][j]) << ((3-j)*8);
-		out[i] = temp;
-	}
-}
-
-#define roundkeys(i, j)		m_roundkeys[(i)*4+(j)]
-#define roundkeys4(i)		(m_roundkeys+(i)*4)
-
-void Square::Base::UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &)
-{
-	AssertValidKeyLength(length);
-
-	static const word32 offset[ROUNDS] = {
-	0x01000000UL, 0x02000000UL, 0x04000000UL, 0x08000000UL,
-	0x10000000UL, 0x20000000UL, 0x40000000UL, 0x80000000UL,
-	};
-
-	GetUserKey(BIG_ENDIAN_ORDER, m_roundkeys.data(), KEYLENGTH/4, userKey, KEYLENGTH);
-
-	/* apply the key evolution function */
-	for (int i = 1; i < ROUNDS+1; i++)
-	{
-		roundkeys(i, 0) = roundkeys(i-1, 0) ^ rotlFixed(roundkeys(i-1, 3), 8U) ^ offset[i-1];
-		roundkeys(i, 1) = roundkeys(i-1, 1) ^ roundkeys(i, 0);
-		roundkeys(i, 2) = roundkeys(i-1, 2) ^ roundkeys(i, 1);
-		roundkeys(i, 3) = roundkeys(i-1, 3) ^ roundkeys(i, 2);
-	}  
-
-	/* produce the round keys */
-	if (IsForwardTransformation())
-	{
-		for (int i = 0; i < ROUNDS; i++)
-			SquareTransform (roundkeys4(i), roundkeys4(i));
-	}
-	else
-	{
-		for (int i = 0; i < ROUNDS/2; i++)
-			for (int j = 0; j < 4; j++)
-				std::swap(roundkeys(i, j), roundkeys(ROUNDS-i, j));
-		SquareTransform (roundkeys4(ROUNDS), roundkeys4(ROUNDS));
-	}
-}
-
-#define MSB(x) (((x) >> 24) & 0xffU)	/* most  significant byte */
-#define SSB(x) (((x) >> 16) & 0xffU)	/* second in significance */
-#define TSB(x) (((x) >>  8) & 0xffU)	/* third  in significance */
-#define LSB(x) (((x)      ) & 0xffU)	/* least significant byte */
-
-#define squareRound(text, temp, T0, T1, T2, T3, roundkey) \
-{ \
-	temp[0] = T0[MSB (text[0])] \
-			^ T1[MSB (text[1])] \
-			^ T2[MSB (text[2])] \
-			^ T3[MSB (text[3])] \
-			^ roundkey[0]; \
-	temp[1] = T0[SSB (text[0])] \
-			^ T1[SSB (text[1])] \
-			^ T2[SSB (text[2])] \
-			^ T3[SSB (text[3])] \
-			^ roundkey[1]; \
-	temp[2] = T0[TSB (text[0])] \
-			^ T1[TSB (text[1])] \
-			^ T2[TSB (text[2])] \
-			^ T3[TSB (text[3])] \
-			^ roundkey[2]; \
-	temp[3] = T0[LSB (text[0])] \
-			^ T1[LSB (text[1])] \
-			^ T2[LSB (text[2])] \
-			^ T3[LSB (text[3])] \
-			^ roundkey[3]; \
-} /* squareRound */
-
-#define squareFinal(text, temp, S, roundkey) \
-{ \
-	text[0] = ((word32) (S[MSB (temp[0])]) << 24) \
-			^ ((word32) (S[MSB (temp[1])]) << 16) \
-			^ ((word32) (S[MSB (temp[2])]) <<  8) \
-			^  (word32) (S[MSB (temp[3])]) \
-			^ roundkey[0]; \
-	text[1] = ((word32) (S[SSB (temp[0])]) << 24) \
-			^ ((word32) (S[SSB (temp[1])]) << 16) \
-			^ ((word32) (S[SSB (temp[2])]) <<  8) \
-			^  (word32) (S[SSB (temp[3])]) \
-			^ roundkey[1]; \
-	text[2] = ((word32) (S[TSB (temp[0])]) << 24) \
-			^ ((word32) (S[TSB (temp[1])]) << 16) \
-			^ ((word32) (S[TSB (temp[2])]) <<  8) \
-			^  (word32) (S[TSB (temp[3])]) \
-			^ roundkey[2]; \
-	text[3] = ((word32) (S[LSB (temp[0])]) << 24) \
-			^ ((word32) (S[LSB (temp[1])]) << 16) \
-			^ ((word32) (S[LSB (temp[2])]) <<  8) \
-			^  (word32) (S[LSB (temp[3])]) \
-			^ roundkey[3]; \
-} /* squareFinal */
-
-typedef BlockGetAndPut<word32, BigEndian> Block;
-
-void Square::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
-{
-	word32 text[4], temp[4];
-	Block::Get(inBlock)(text[0])(text[1])(text[2])(text[3]);
-   
-	/* initial key addition */
-	text[0] ^= roundkeys(0, 0);
-	text[1] ^= roundkeys(0, 1);
-	text[2] ^= roundkeys(0, 2);
-	text[3] ^= roundkeys(0, 3);
- 
-	/* ROUNDS - 1 full rounds */
-	for (int i=1; i+1<ROUNDS; i+=2)
-	{
-		squareRound (text, temp, Te[0], Te[1], Te[2], Te[3], roundkeys4(i));
-		squareRound (temp, text, Te[0], Te[1], Te[2], Te[3], roundkeys4(i+1));
-	}
-	squareRound (text, temp, Te[0], Te[1], Te[2], Te[3], roundkeys4(ROUNDS-1));
-
-	/* last round (diffusion becomes only transposition) */
-	squareFinal (text, temp, Se, roundkeys4(ROUNDS));
-
-	Block::Put(xorBlock, outBlock)(text[0])(text[1])(text[2])(text[3]);
-}
-
-void Square::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
-{
-	word32 text[4], temp[4];
-	Block::Get(inBlock)(text[0])(text[1])(text[2])(text[3]);
-   
-	/* initial key addition */
-	text[0] ^= roundkeys(0, 0);
-	text[1] ^= roundkeys(0, 1);
-	text[2] ^= roundkeys(0, 2);
-	text[3] ^= roundkeys(0, 3);
- 
-	/* ROUNDS - 1 full rounds */
-	for (int i=1; i+1<ROUNDS; i+=2)
-	{
-		squareRound (text, temp, Td[0], Td[1], Td[2], Td[3], roundkeys4(i));
-		squareRound (temp, text, Td[0], Td[1], Td[2], Td[3], roundkeys4(i+1));
-	}
-	squareRound (text, temp, Td[0], Td[1], Td[2], Td[3], roundkeys4(ROUNDS-1));
-
-	/* last round (diffusion becomes only transposition) */
-	squareFinal (text, temp, Sd, roundkeys4(ROUNDS));
-
-	Block::Put(xorBlock, outBlock)(text[0])(text[1])(text[2])(text[3]);
-}
-
-NAMESPACE_END