Remove sha256 impl for now

src/coreclr/md/enc/sha256.cpp

@@ -9,175 +9,8 @@
 //
 //*****************************************************************************
 
-//*****************************************************************************
-// SHA256 IMPL: https://github.com/solokeys/solo1/blob/master/crypto/sha256/sha256.c
-// * Author:     Brad Conte (brad AT bradconte.com)
-// * Copyright:
-// * Disclaimer: This code is presented "as is" without any guarantees.
-// * Details:    Implementation of the SHA-256 hashing algorithm.
-//               SHA-256 is one of the three algorithms in the SHA2
-//               specification. The others, SHA-384 and SHA-512, are not
-//               offered in this implementation.
-//               Algorithm specification can be found here:
-//                * http://csrc.nist.gov/publications/fips/fips180-2/fips180-2withchangenotice.pdf
-//               This implementation uses little endian byte order.
-//*****************************************************************************
-#define SHA256_BLOCK_SIZE 32
-
-typedef struct {
-	BYTE data[64];
-	UINT datalen;
-	unsigned long long bitlen;
-	UINT state[8];
-} SHA256_CTX;
-
-#define ROTLEFT(a,b) (((a) << (b)) | ((a) >> (32-(b))))
-#define ROTRIGHT(a,b) (((a) >> (b)) | ((a) << (32-(b))))
-
-#define CH(x,y,z) (((x) & (y)) ^ (~(x) & (z)))
-#define MAJ(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
-#define EP0(x) (ROTRIGHT(x,2) ^ ROTRIGHT(x,13) ^ ROTRIGHT(x,22))
-#define EP1(x) (ROTRIGHT(x,6) ^ ROTRIGHT(x,11) ^ ROTRIGHT(x,25))
-#define SIG0(x) (ROTRIGHT(x,7) ^ ROTRIGHT(x,18) ^ ((x) >> 3))
-#define SIG1(x) (ROTRIGHT(x,17) ^ ROTRIGHT(x,19) ^ ((x) >> 10))
-
-static const unsigned int k[64] = {
-	0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,
-	0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,
-	0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,
-	0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,
-	0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,
-	0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,0xd192e819,0xd6990624,0xf40e3585,0x106aa070,
-	0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,
-	0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
-};
-
-void sha256_transform(SHA256_CTX *ctx, const BYTE data[])
-{
-	WORD a, b, c, d, e, f, g, h, i, j, t1, t2, m[64];
-
-	for (i = 0, j = 0; i < 16; ++i, j += 4)
-		m[i] = (data[j] << 24) | (data[j + 1] << 16) | (data[j + 2] << 8) | (data[j + 3]);
-	for ( ; i < 64; ++i)
-		m[i] = (WORD)SIG1((UINT)(m[i - 2])) + m[i - 7] + (WORD)SIG0((UINT)(m[i - 15])) + m[i - 16];
-
-	a = (WORD)ctx->state[0];
-	b = (WORD)ctx->state[1];
-	c = (WORD)ctx->state[2];
-	d = (WORD)ctx->state[3];
-	e = (WORD)ctx->state[4];
-	f = (WORD)ctx->state[5];
-	g = (WORD)ctx->state[6];
-	h = (WORD)ctx->state[7];
-
-	for (i = 0; i < 64; ++i) {
-		t1 = (WORD)(h + (WORD)EP1((UINT)e) + CH(e,f,g) + k[i] + m[i]);
-		t2 = (WORD)EP0((UINT)a) + MAJ(a,b,c);
-		h = g;
-		g = f;
-		f = e;
-		e = d + t1;
-		d = c;
-		c = b;
-		b = a;
-		a = t1 + t2;
-	}
-
-	ctx->state[0] += a;
-	ctx->state[1] += b;
-	ctx->state[2] += c;
-	ctx->state[3] += d;
-	ctx->state[4] += e;
-	ctx->state[5] += f;
-	ctx->state[6] += g;
-	ctx->state[7] += h;
-}
-
-void sha256_init(SHA256_CTX *ctx)
-{
-	ctx->datalen = 0;
-	ctx->bitlen = 0;
-	ctx->state[0] = 0x6a09e667;
-	ctx->state[1] = 0xbb67ae85;
-	ctx->state[2] = 0x3c6ef372;
-	ctx->state[3] = 0xa54ff53a;
-	ctx->state[4] = 0x510e527f;
-	ctx->state[5] = 0x9b05688c;
-	ctx->state[6] = 0x1f83d9ab;
-	ctx->state[7] = 0x5be0cd19;
-}
-
-void sha256_update(SHA256_CTX *ctx, const BYTE data[], size_t len)
-{
-	WORD i;
-
-	for (i = 0; i < len; ++i) {
-		ctx->data[ctx->datalen] = data[i];
-		ctx->datalen++;
-		if (ctx->datalen == 64) {
-			sha256_transform(ctx, ctx->data);
-			ctx->bitlen += 512;
-			ctx->datalen = 0;
-		}
-	}
-}
-
-void sha256_final(SHA256_CTX *ctx, BYTE hash[])
-{
-	WORD i;
-
-	i = (WORD)ctx->datalen;
-
-	// Pad whatever data is left in the buffer.
-	if (ctx->datalen < 56) {
-		ctx->data[i++] = 0x80;
-		while (i < 56)
-			ctx->data[i++] = 0x00;
-	}
-	else {
-		ctx->data[i++] = 0x80;
-		while (i < 64)
-			ctx->data[i++] = 0x00;
-		sha256_transform(ctx, ctx->data);
-		memset(ctx->data, 0, 56);
-	}
-
-	// Append to the padding the total message's length in bits and transform.
-	ctx->bitlen += ctx->datalen * 8;
-	ctx->data[63] = (BYTE)ctx->bitlen;
-	ctx->data[62] = (BYTE)(ctx->bitlen >> 8);
-	ctx->data[61] = (BYTE)(ctx->bitlen >> 16);
-	ctx->data[60] = (BYTE)(ctx->bitlen >> 24);
-	ctx->data[59] = (BYTE)(ctx->bitlen >> 32);
-	ctx->data[58] = (BYTE)(ctx->bitlen >> 40);
-	ctx->data[57] = (BYTE)(ctx->bitlen >> 48);
-	ctx->data[56] = (BYTE)(ctx->bitlen >> 56);
-	sha256_transform(ctx, ctx->data);
-
-	// Since this implementation uses little endian byte ordering and SHA uses big endian,
-	// reverse all the bytes when copying the final state to the output hash.
-	for (i = 0; i < 4; ++i) {
-		hash[i]      = (ctx->state[0] >> (24 - i * 8)) & 0x000000ff;
-		hash[i + 4]  = (ctx->state[1] >> (24 - i * 8)) & 0x000000ff;
-		hash[i + 8]  = (ctx->state[2] >> (24 - i * 8)) & 0x000000ff;
-		hash[i + 12] = (ctx->state[3] >> (24 - i * 8)) & 0x000000ff;
-		hash[i + 16] = (ctx->state[4] >> (24 - i * 8)) & 0x000000ff;
-		hash[i + 20] = (ctx->state[5] >> (24 - i * 8)) & 0x000000ff;
-		hash[i + 24] = (ctx->state[6] >> (24 - i * 8)) & 0x000000ff;
-		hash[i + 28] = (ctx->state[7] >> (24 - i * 8)) & 0x000000ff;
-	}
-}
-
 HRESULT Sha256Hash(BYTE* pSrc, DWORD srcSize, BYTE* pDst, DWORD dstSize)
 {
-    BYTE hash[SHA256_BLOCK_SIZE];
-	SHA256_CTX ctx;
-
-	sha256_init(&ctx);
-	sha256_update(&ctx, pSrc, srcSize);
-	sha256_final(&ctx, hash);
-
-    memcpy(pDst, hash, std::min((DWORD)SHA256_BLOCK_SIZE, dstSize));
-
+    // TODO:
     return S_OK;
-}
+}