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, 213 deletions

diff --git a/cryptopp562/seal.cpp b/cryptopp562/seal.cpp
deleted file mode 100644
index f49b522..0000000
--- a/cryptopp562/seal.cpp
+++ /dev/null
@@ -1,213 +0,0 @@
-// seal.cpp - written and placed in the public domain by Wei Dai
-// updated to SEAL 3.0 by Leonard Janke
-
-#include "pch.h"
-
-#include "seal.h"
-#include "sha.h"
-#include "misc.h"
-
-NAMESPACE_BEGIN(CryptoPP)
-
-void SEAL_TestInstantiations()
-{
-	SEAL<>::Encryption x;
-}
-
-struct SEAL_Gamma
-{
-	SEAL_Gamma(const byte *key)
-		: H(5), Z(5), D(16), lastIndex(0xffffffff)
-	{
-		GetUserKey(BIG_ENDIAN_ORDER, H.begin(), 5, key, 20);
-		memset(D, 0, 64);
-	}
-
-	word32 Apply(word32 i);
-
-	SecBlock<word32> H, Z, D;
-	word32 lastIndex;
-};
-
-word32 SEAL_Gamma::Apply(word32 i)
-{
-	word32 shaIndex = i/5;
-	if (shaIndex != lastIndex)
-	{
-		memcpy(Z, H, 20);
-		D[0] = shaIndex;
-		SHA::Transform(Z, D);
-		lastIndex = shaIndex;
-	}
-	return Z[i%5];
-}
-
-template <class B>
-void SEAL_Policy<B>::CipherSetKey(const NameValuePairs &params, const byte *key, size_t length)
-{
-	m_insideCounter = m_outsideCounter = m_startCount = 0;
-
-	unsigned int L = params.GetIntValueWithDefault("NumberOfOutputBitsPerPositionIndex", 32*1024);
-	m_iterationsPerCount = L / 8192;
-
-	SEAL_Gamma gamma(key);
-	unsigned int i;
-
-	for (i=0; i<512; i++)
-		m_T[i] = gamma.Apply(i);
-
-	for (i=0; i<256; i++)
-		m_S[i] = gamma.Apply(0x1000+i);
-
-	m_R.New(4*(L/8192));
-
-	for (i=0; i<m_R.size(); i++)
-		m_R[i] = gamma.Apply(0x2000+i);
-}
-
-template <class B>
-void SEAL_Policy<B>::CipherResynchronize(byte *keystreamBuffer, const byte *IV, size_t length)
-{
-	assert(length==4);
-	m_outsideCounter = IV ? GetWord<word32>(false, BIG_ENDIAN_ORDER, IV) : 0;
-	m_startCount = m_outsideCounter;
-	m_insideCounter = 0;
-}
-
-template <class B>
-void SEAL_Policy<B>::SeekToIteration(lword iterationCount)
-{
-	m_outsideCounter = m_startCount + (unsigned int)(iterationCount / m_iterationsPerCount);
-	m_insideCounter = (unsigned int)(iterationCount % m_iterationsPerCount);
-}
-
-template <class B>
-void SEAL_Policy<B>::OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount)
-{
-	word32 a, b, c, d, n1, n2, n3, n4;
-	unsigned int p, q;
-
-	for (size_t iteration = 0; iteration < iterationCount; ++iteration)
-	{
-#define Ttab(x) *(word32 *)((byte *)m_T.begin()+x)
-
-		a = m_outsideCounter ^ m_R[4*m_insideCounter];
-		b = rotrFixed(m_outsideCounter, 8U) ^ m_R[4*m_insideCounter+1];
-		c = rotrFixed(m_outsideCounter, 16U) ^ m_R[4*m_insideCounter+2];
-		d = rotrFixed(m_outsideCounter, 24U) ^ m_R[4*m_insideCounter+3];
-
-		for (unsigned int j=0; j<2; j++)
-		{
-			p = a & 0x7fc;
-			b += Ttab(p);
-			a = rotrFixed(a, 9U);
-
-			p = b & 0x7fc;
-			c += Ttab(p);
-			b = rotrFixed(b, 9U);
-
-			p = c & 0x7fc;
-			d += Ttab(p);
-			c = rotrFixed(c, 9U);
-
-			p = d & 0x7fc;
-			a += Ttab(p);
-			d = rotrFixed(d, 9U);
-		}
-
-		n1 = d, n2 = b, n3 = a, n4 = c;
-
-		p = a & 0x7fc;
-		b += Ttab(p);
-		a = rotrFixed(a, 9U);
-
-		p = b & 0x7fc;
-		c += Ttab(p);
-		b = rotrFixed(b, 9U);
-
-		p = c & 0x7fc;
-		d += Ttab(p);
-		c = rotrFixed(c, 9U);
-
-		p = d & 0x7fc;
-		a += Ttab(p);
-		d = rotrFixed(d, 9U);
-		
-		// generate 8192 bits
-		for (unsigned int i=0; i<64; i++)
-		{
-			p = a & 0x7fc;
-			a = rotrFixed(a, 9U);
-			b += Ttab(p);
-			b ^= a;
-
-			q = b & 0x7fc;
-			b = rotrFixed(b, 9U);
-			c ^= Ttab(q);
-			c += b;
-
-			p = (p+c) & 0x7fc;
-			c = rotrFixed(c, 9U);
-			d += Ttab(p);
-			d ^= c;
-
-			q = (q+d) & 0x7fc;
-			d = rotrFixed(d, 9U);
-			a ^= Ttab(q);
-			a += d;
-
-			p = (p+a) & 0x7fc;
-			b ^= Ttab(p);
-			a = rotrFixed(a, 9U);
-
-			q = (q+b) & 0x7fc;
-			c += Ttab(q);
-			b = rotrFixed(b, 9U);
-
-			p = (p+c) & 0x7fc;
-			d ^= Ttab(p);
-			c = rotrFixed(c, 9U);
-
-			q = (q+d) & 0x7fc;
-			d = rotrFixed(d, 9U);
-			a += Ttab(q);
-
-#define SEAL_OUTPUT(x)	\
-	CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, B::ToEnum(), 0, b + m_S[4*i+0]);\
-	CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, B::ToEnum(), 1, c ^ m_S[4*i+1]);\
-	CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, B::ToEnum(), 2, d + m_S[4*i+2]);\
-	CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, B::ToEnum(), 3, a ^ m_S[4*i+3]);
-
-			CRYPTOPP_KEYSTREAM_OUTPUT_SWITCH(SEAL_OUTPUT, 4*4);
-
-			if (i & 1)
-			{
-				a += n3;
-				b += n4;
-				c ^= n3;
-				d ^= n4;
-			}
-			else
-			{
-				a += n1;
-				b += n2;        
-				c ^= n1;
-				d ^= n2;
-			}
-		}
-
-		if (++m_insideCounter == m_iterationsPerCount)
-		{
-			++m_outsideCounter;
-			m_insideCounter = 0;
-		}
-	}
-
-	a = b = c = d = n1 = n2 = n3 = n4 = 0;
-	p = q = 0;
-}
-
-template class SEAL_Policy<BigEndian>;
-template class SEAL_Policy<LittleEndian>;
-
-NAMESPACE_END