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, 108 deletions

diff --git a/cryptopp562/xtrcrypt.cpp b/cryptopp562/xtrcrypt.cpp
deleted file mode 100644
index 20e78e7..0000000
--- a/cryptopp562/xtrcrypt.cpp
+++ /dev/null
@@ -1,108 +0,0 @@
-// xtrcrypt.cpp - written and placed in the public domain by Wei Dai
-
-#include "pch.h"
-#include "xtrcrypt.h"
-#include "nbtheory.h"
-#include "asn.h"
-#include "argnames.h"
-
-NAMESPACE_BEGIN(CryptoPP)
-
-XTR_DH::XTR_DH(const Integer &p, const Integer &q, const GFP2Element &g)
-	: m_p(p), m_q(q), m_g(g)
-{
-}
-
-XTR_DH::XTR_DH(RandomNumberGenerator &rng, unsigned int pbits, unsigned int qbits)
-{
-	XTR_FindPrimesAndGenerator(rng, m_p, m_q, m_g, pbits, qbits);
-}
-
-XTR_DH::XTR_DH(BufferedTransformation &bt)
-{
-	BERSequenceDecoder seq(bt);
-	m_p.BERDecode(seq);
-	m_q.BERDecode(seq);
-	m_g.c1.BERDecode(seq);
-	m_g.c2.BERDecode(seq);
-	seq.MessageEnd();
-}
-
-void XTR_DH::DEREncode(BufferedTransformation &bt) const
-{
-	DERSequenceEncoder seq(bt);
-	m_p.DEREncode(seq);
-	m_q.DEREncode(seq);
-	m_g.c1.DEREncode(seq);
-	m_g.c2.DEREncode(seq);
-	seq.MessageEnd();
-}
-
-bool XTR_DH::Validate(RandomNumberGenerator &rng, unsigned int level) const
-{
-	bool pass = true;
-	pass = pass && m_p > Integer::One() && m_p.IsOdd();
-	pass = pass && m_q > Integer::One() && m_q.IsOdd();
-	GFP2Element three = GFP2_ONB<ModularArithmetic>(m_p).ConvertIn(3);
-	pass = pass && !(m_g.c1.IsNegative() || m_g.c2.IsNegative() || m_g.c1 >= m_p || m_g.c2 >= m_p || m_g == three);
-	if (level >= 1)
-		pass = pass && ((m_p.Squared()-m_p+1)%m_q).IsZero();
-	if (level >= 2)
-	{
-		pass = pass && VerifyPrime(rng, m_p, level-2) && VerifyPrime(rng, m_q, level-2);
-		pass = pass && XTR_Exponentiate(m_g, (m_p.Squared()-m_p+1)/m_q, m_p) != three;
-		pass = pass && XTR_Exponentiate(m_g, m_q, m_p) == three;
-	}
-	return pass;
-}
-
-bool XTR_DH::GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const
-{
-	return GetValueHelper(this, name, valueType, pValue).Assignable()
-		CRYPTOPP_GET_FUNCTION_ENTRY(Modulus)
-		CRYPTOPP_GET_FUNCTION_ENTRY(SubgroupOrder)
-		CRYPTOPP_GET_FUNCTION_ENTRY(SubgroupGenerator)
-		;
-}
-
-void XTR_DH::AssignFrom(const NameValuePairs &source)
-{
-	AssignFromHelper(this, source)
-		CRYPTOPP_SET_FUNCTION_ENTRY(Modulus)
-		CRYPTOPP_SET_FUNCTION_ENTRY(SubgroupOrder)
-		CRYPTOPP_SET_FUNCTION_ENTRY(SubgroupGenerator)
-		;
-}
-
-void XTR_DH::GeneratePrivateKey(RandomNumberGenerator &rng, byte *privateKey) const
-{
-	Integer x(rng, Integer::Zero(), m_q-1);
-	x.Encode(privateKey, PrivateKeyLength());
-}
-
-void XTR_DH::GeneratePublicKey(RandomNumberGenerator &rng, const byte *privateKey, byte *publicKey) const
-{
-	Integer x(privateKey, PrivateKeyLength());
-	GFP2Element y = XTR_Exponentiate(m_g, x, m_p);
-	y.Encode(publicKey, PublicKeyLength());
-}
-
-bool XTR_DH::Agree(byte *agreedValue, const byte *privateKey, const byte *otherPublicKey, bool validateOtherPublicKey) const
-{
-	GFP2Element w(otherPublicKey, PublicKeyLength());
-	if (validateOtherPublicKey)
-	{
-		GFP2_ONB<ModularArithmetic> gfp2(m_p);
-		GFP2Element three = gfp2.ConvertIn(3);
-		if (w.c1.IsNegative() || w.c2.IsNegative() || w.c1 >= m_p || w.c2 >= m_p || w == three)
-			return false;
-		if (XTR_Exponentiate(w, m_q, m_p) != three)
-			return false;
-	}
-	Integer s(privateKey, PrivateKeyLength());
-	GFP2Element z = XTR_Exponentiate(w, s, m_p);
-	z.Encode(agreedValue, AgreedValueLength());
-	return true;
-}
-
-NAMESPACE_END