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, 100 deletions

diff --git a/cryptopp562/xtr.cpp b/cryptopp562/xtr.cpp
deleted file mode 100644
index 6739070..0000000
--- a/cryptopp562/xtr.cpp
+++ /dev/null
@@ -1,100 +0,0 @@
-// cryptlib.cpp - written and placed in the public domain by Wei Dai
-
-#include "pch.h"
-#include "xtr.h"
-#include "nbtheory.h"
-
-#include "algebra.cpp"
-
-NAMESPACE_BEGIN(CryptoPP)
-
-const GFP2Element & GFP2Element::Zero()
-{
-	return Singleton<GFP2Element>().Ref();
-}
-
-void XTR_FindPrimesAndGenerator(RandomNumberGenerator &rng, Integer &p, Integer &q, GFP2Element &g, unsigned int pbits, unsigned int qbits)
-{
-	assert(qbits > 9);	// no primes exist for pbits = 10, qbits = 9
-	assert(pbits > qbits);
-
-	const Integer minQ = Integer::Power2(qbits - 1);
-	const Integer maxQ = Integer::Power2(qbits) - 1;
-	const Integer minP = Integer::Power2(pbits - 1);
-	const Integer maxP = Integer::Power2(pbits) - 1;
-
-	Integer r1, r2;
-	do
-	{
-		bool qFound = q.Randomize(rng, minQ, maxQ, Integer::PRIME, 7, 12);
-		assert(qFound);
-		bool solutionsExist = SolveModularQuadraticEquation(r1, r2, 1, -1, 1, q);
-		assert(solutionsExist);
-	} while (!p.Randomize(rng, minP, maxP, Integer::PRIME, CRT(rng.GenerateBit()?r1:r2, q, 2, 3, EuclideanMultiplicativeInverse(p, 3)), 3*q));
-	assert(((p.Squared() - p + 1) % q).IsZero());
-
-	GFP2_ONB<ModularArithmetic> gfp2(p);
-	GFP2Element three = gfp2.ConvertIn(3), t;
-
-	while (true)
-	{
-		g.c1.Randomize(rng, Integer::Zero(), p-1);
-		g.c2.Randomize(rng, Integer::Zero(), p-1);
-		t = XTR_Exponentiate(g, p+1, p);
-		if (t.c1 == t.c2)
-			continue;
-		g = XTR_Exponentiate(g, (p.Squared()-p+1)/q, p);
-		if (g != three)
-			break;
-	}
-	assert(XTR_Exponentiate(g, q, p) == three);
-}
-
-GFP2Element XTR_Exponentiate(const GFP2Element &b, const Integer &e, const Integer &p)
-{
-	unsigned int bitCount = e.BitCount();
-	if (bitCount == 0)
-		return GFP2Element(-3, -3);
-
-	// find the lowest bit of e that is 1
-	unsigned int lowest1bit;
-	for (lowest1bit=0; e.GetBit(lowest1bit) == 0; lowest1bit++) {}
-
-	GFP2_ONB<MontgomeryRepresentation> gfp2(p);
-	GFP2Element c = gfp2.ConvertIn(b);
-	GFP2Element cp = gfp2.PthPower(c);
-	GFP2Element S[5] = {gfp2.ConvertIn(3), c, gfp2.SpecialOperation1(c)};
-
-	// do all exponents bits except the lowest zeros starting from the top
-	unsigned int i;
-	for (i = e.BitCount() - 1; i>lowest1bit; i--)
-	{
-		if (e.GetBit(i))
-		{
-			gfp2.RaiseToPthPower(S[0]);
-			gfp2.Accumulate(S[0], gfp2.SpecialOperation2(S[2], c, S[1]));
-			S[1] = gfp2.SpecialOperation1(S[1]);
-			S[2] = gfp2.SpecialOperation1(S[2]);
-			S[0].swap(S[1]);
-		}
-		else
-		{
-			gfp2.RaiseToPthPower(S[2]);
-			gfp2.Accumulate(S[2], gfp2.SpecialOperation2(S[0], cp, S[1]));
-			S[1] = gfp2.SpecialOperation1(S[1]);
-			S[0] = gfp2.SpecialOperation1(S[0]);
-			S[2].swap(S[1]);
-		}
-	}
-
-	// now do the lowest zeros
-	while (i--)
-		S[1] = gfp2.SpecialOperation1(S[1]);
-
-	return gfp2.ConvertOut(S[1]);
-}
-
-template class AbstractRing<GFP2Element>;
-template class AbstractGroup<GFP2Element>;
-
-NAMESPACE_END