static void SHA256Final(ref SHA256_CTX ctx, byte[] hash)
{
uint i = 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;
}
SHA256Transform(ref ctx, ctx.data);
}
// Append to the padding the total message's length in bits and transform.
DBL_INT_ADD(ref ctx.bitlen[0], ref ctx.bitlen[1], ctx.datalen * 8);
ctx.data[63] = (byte)(ctx.bitlen[0]);
ctx.data[62] = (byte)(ctx.bitlen[0] >> 8);
ctx.data[61] = (byte)(ctx.bitlen[0] >> 16);
ctx.data[60] = (byte)(ctx.bitlen[0] >> 24);
ctx.data[59] = (byte)(ctx.bitlen[1]);
ctx.data[58] = (byte)(ctx.bitlen[1] >> 8);
ctx.data[57] = (byte)(ctx.bitlen[1] >> 16);
ctx.data[56] = (byte)(ctx.bitlen[1] >> 24);
SHA256Transform(ref 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] = (byte)(((ctx.state[0]) >> (int)(24 - i * 8)) & 0x000000ff);
hash[i + 4] = (byte)(((ctx.state[1]) >> (int)(24 - i * 8)) & 0x000000ff);
hash[i + 8] = (byte)(((ctx.state[2]) >> (int)(24 - i * 8)) & 0x000000ff);
hash[i + 12] = (byte)((ctx.state[3] >> (int)(24 - i * 8)) & 0x000000ff);
hash[i + 16] = (byte)((ctx.state[4] >> (int)(24 - i * 8)) & 0x000000ff);
hash[i + 20] = (byte)((ctx.state[5] >> (int)(24 - i * 8)) & 0x000000ff);
hash[i + 24] = (byte)((ctx.state[6] >> (int)(24 - i * 8)) & 0x000000ff);
hash[i + 28] = (byte)((ctx.state[7] >> (int)(24 - i * 8)) & 0x000000ff);
}
}
private static void SHA256Init(ref SHA256_CTX ctx)
{
ctx.datalen = 0u;
ctx.bitlen[0] = 0u;
ctx.bitlen[1] = 0u;
ctx.state[0] = 1779033703u;
ctx.state[1] = 3144134277u;
ctx.state[2] = 1013904242u;
ctx.state[3] = 2773480762u;
ctx.state[4] = 1359893119u;
ctx.state[5] = 2600822924u;
ctx.state[6] = 528734635u;
ctx.state[7] = 1541459225u;
}
//Initialize
static void SHA256Init(ref SHA256_CTX ctx)
{
ctx.datalen = 0;
ctx.bitlen[0] = 0;
ctx.bitlen[1] = 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;
}
private static void SHA256Update(ref SHA256_CTX ctx, byte[] data, uint len)
{
for (uint num = 0u; num < len; num++)
{
ctx.data[ctx.datalen] = data[num];
ctx.datalen++;
if (ctx.datalen == 64)
{
SHA256Transform(ref ctx, ctx.data);
DBL_INT_ADD(ref ctx.bitlen[0], ref ctx.bitlen[1], 512u);
ctx.datalen = 0u;
}
}
}
static void SHA256Init(ref SHA256_CTX ctx)
{
ctx.datalen = 0;
ctx.bitlen[0] = 0;
ctx.bitlen[1] = 0;
ctx.state[0] = initalHashValue[0];
ctx.state[1] = initalHashValue[1];
ctx.state[2] = initalHashValue[2];
ctx.state[3] = initalHashValue[3];
ctx.state[4] = initalHashValue[4];
ctx.state[5] = initalHashValue[5];
ctx.state[6] = initalHashValue[6];
ctx.state[7] = initalHashValue[7];
}
static void SHA256Update(ref SHA256_CTX ctx, byte[] data, uint len)
{
for (uint i = 0; i < len; ++i)
{
ctx.data[ctx.datalen] = data[i];
ctx.datalen++;
if (ctx.datalen == 64)
{
SHA256Transform(ref ctx, ctx.data);
DBL_INT_ADD(ref ctx.bitlen[0], ref ctx.bitlen[1], 512);
ctx.datalen = 0;
}
}
}
static void SHA256Transform(ref SHA256_CTX ctx, byte[] data)
{
uint a, b, c, d, e, f, g, h, i, j, t1, t2;
uint[] m = new uint[64];
for (i = 0, j = 0; i < 16; ++i, j += 4)
{
m[i] = (uint)((data[j] << 24) | (data[j + 1] << 16) | (data[j + 2] << 8) | (data[j + 3]));
}
for (; i < 64; ++i)
{
m[i] = SIG1(m[i - 2]) + m[i - 7] + SIG0(m[i - 15]) + m[i - 16];
}
a = ctx.state[0];
b = ctx.state[1];
c = ctx.state[2];
d = ctx.state[3];
e = ctx.state[4];
f = ctx.state[5];
g = ctx.state[6];
h = ctx.state[7];
for (i = 0; i < 64; ++i)
{
t1 = h + EP1(e) + CH(e, f, g) + k[i] + m[i];
t2 = EP0(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;
}
static void SHA256Final(ref SHA256_CTX ctx, byte[] hash)
{
uint i = ctx.datalen;
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;
}
SHA256Transform(ref ctx, ctx.data);
}
DBL_INT_ADD(ref ctx.bitlen[0], ref ctx.bitlen[1], ctx.datalen * 8);
ctx.data[63] = (byte)(ctx.bitlen[0]);
ctx.data[62] = (byte)(ctx.bitlen[0] >> 8);
ctx.data[61] = (byte)(ctx.bitlen[0] >> 16);
ctx.data[60] = (byte)(ctx.bitlen[0] >> 24);
ctx.data[59] = (byte)(ctx.bitlen[1]);
ctx.data[58] = (byte)(ctx.bitlen[1] >> 8);
ctx.data[57] = (byte)(ctx.bitlen[1] >> 16);
ctx.data[56] = (byte)(ctx.bitlen[1] >> 24);
SHA256Transform(ref ctx, ctx.data);
for (i = 0; i < 4; ++i)
{
hash[i] = (byte)(((ctx.state[0]) >> (int)(24 - i * 8)) & 0x000000ff);
hash[i + 4] = (byte)(((ctx.state[1]) >> (int)(24 - i * 8)) & 0x000000ff);
hash[i + 8] = (byte)(((ctx.state[2]) >> (int)(24 - i * 8)) & 0x000000ff);
hash[i + 12] = (byte)((ctx.state[3] >> (int)(24 - i * 8)) & 0x000000ff);
hash[i + 16] = (byte)((ctx.state[4] >> (int)(24 - i * 8)) & 0x000000ff);
hash[i + 20] = (byte)((ctx.state[5] >> (int)(24 - i * 8)) & 0x000000ff);
hash[i + 24] = (byte)((ctx.state[6] >> (int)(24 - i * 8)) & 0x000000ff);
hash[i + 28] = (byte)((ctx.state[7] >> (int)(24 - i * 8)) & 0x000000ff);
}
}
private static void SHA256Transform(ref SHA256_CTX ctx, byte[] data)
{
uint[] array = new uint[64];
uint num = 0u;
uint num2 = 0u;
while (num < 16)
{
array[num] = (uint)((data[num2] << 24) | (data[num2 + 1] << 16) | (data[num2 + 2] << 8) | data[num2 + 3]);
num++;
num2 += 4;
}
for (; num < 64; num++)
{
array[num] = SIG1(array[num - 2]) + array[num - 7] + SIG0(array[num - 15]) + array[num - 16];
}
uint num3 = ctx.state[0];
uint num4 = ctx.state[1];
uint num5 = ctx.state[2];
uint num6 = ctx.state[3];
uint num7 = ctx.state[4];
uint num8 = ctx.state[5];
uint num9 = ctx.state[6];
uint num10 = ctx.state[7];
for (num = 0u; num < 64; num++)
{
uint num11 = num10 + EP1(num7) + CH(num7, num8, num9) + k[num] + array[num];
uint num12 = EP0(num3) + MAJ(num3, num4, num5);
num10 = num9;
num9 = num8;
num8 = num7;
num7 = num6 + num11;
num6 = num5;
num5 = num4;
num4 = num3;
num3 = num11 + num12;
}
ctx.state[0] += num3;
ctx.state[1] += num4;
ctx.state[2] += num5;
ctx.state[3] += num6;
ctx.state[4] += num7;
ctx.state[5] += num8;
ctx.state[6] += num9;
ctx.state[7] += num10;
}
public byte[] Crypt(byte[] input)
{
SHA256_CTX ctx = new SHA256_CTX();
ctx.data = new byte[64];
ctx.bitlen = new uint[2];
ctx.state = new uint[8];
byte[] hash = new byte[32];
string hashStr = string.Empty;
SHA256Init(ref ctx);
SHA256Update(ref ctx, input, (uint)input.Length);
SHA256Final(ref ctx, hash);
return(hash);
}
public static string SHA256(string data)
{
SHA256_CTX ctx = default(SHA256_CTX);
ctx.data = new byte[64];
ctx.bitlen = new uint[2];
ctx.state = new uint[8];
byte[] array = new byte[32];
string text = string.Empty;
SHA256Init(ref ctx);
SHA256Update(ref ctx, Encoding.Default.GetBytes(data), (uint)data.Length);
SHA256Final(ref ctx, array);
for (int i = 0; i < 32; i++)
{
text += $"{array[i]:X2}";
}
return(text);
}
private static void SHA256Final(ref SHA256_CTX ctx, byte[] hash)
{
uint num = ctx.datalen;
if (ctx.datalen < 56)
{
ctx.data[num++] = 128;
while (num < 56)
{
ctx.data[num++] = 0;
}
}
else
{
ctx.data[num++] = 128;
while (num < 64)
{
ctx.data[num++] = 0;
}
SHA256Transform(ref ctx, ctx.data);
}
DBL_INT_ADD(ref ctx.bitlen[0], ref ctx.bitlen[1], ctx.datalen * 8);
ctx.data[63] = (byte)ctx.bitlen[0];
ctx.data[62] = (byte)(ctx.bitlen[0] >> 8);
ctx.data[61] = (byte)(ctx.bitlen[0] >> 16);
ctx.data[60] = (byte)(ctx.bitlen[0] >> 24);
ctx.data[59] = (byte)ctx.bitlen[1];
ctx.data[58] = (byte)(ctx.bitlen[1] >> 8);
ctx.data[57] = (byte)(ctx.bitlen[1] >> 16);
ctx.data[56] = (byte)(ctx.bitlen[1] >> 24);
SHA256Transform(ref ctx, ctx.data);
for (num = 0u; num < 4; num++)
{
hash[num] = (byte)((ctx.state[0] >> (int)(24 - num * 8)) & 0xFF);
hash[num + 4] = (byte)((ctx.state[1] >> (int)(24 - num * 8)) & 0xFF);
hash[num + 8] = (byte)((ctx.state[2] >> (int)(24 - num * 8)) & 0xFF);
hash[num + 12] = (byte)((ctx.state[3] >> (int)(24 - num * 8)) & 0xFF);
hash[num + 16] = (byte)((ctx.state[4] >> (int)(24 - num * 8)) & 0xFF);
hash[num + 20] = (byte)((ctx.state[5] >> (int)(24 - num * 8)) & 0xFF);
hash[num + 24] = (byte)((ctx.state[6] >> (int)(24 - num * 8)) & 0xFF);
hash[num + 28] = (byte)((ctx.state[7] >> (int)(24 - num * 8)) & 0xFF);
}
}
public static string HashSha256(string data)
{
SHA256_CTX ctx = new SHA256_CTX();
ctx.data = new byte[64];
ctx.bitlen = new uint[2];
ctx.state = new uint[8];
byte[] hash = new byte[32];
string hashStr = string.Empty;
SHA256Init(ref ctx);
SHA256Update(ref ctx, Encoding.Default.GetBytes(data), (uint)data.Length);
SHA256Final(ref ctx, hash);
for (int i = 0; i < 32; i++)
{
hashStr += string.Format("{0:X2}", hash[i]);
}
return(hashStr);
}
public string Compute(string filename)
{
string data = File.ReadAllText(filename);
SHA256_CTX ctx = new SHA256_CTX();
ctx.data = new byte[64];
ctx.bitlen = new uint[2];
ctx.state = new uint[8];
byte[] hash = new byte[32];
string hashStr = string.Empty;
SHA256Init(ref ctx);
SHA256Update(ref ctx, File.ReadAllBytes(filename), File.ReadAllBytes(filename).Length);
SHA256Final(ref ctx, hash);
for (int i = 0; i < 32; i++)
{
hashStr += string.Format("{0:x2}", hash[i]);
}
return(hashStr);
}
/*********************** FUNCTION DEFINITIONS ***********************/
public void sha256_transform(SHA256_CTX ctx, ReadOnlySpan <byte> data)
{
uint a, b, c, d, e, f, g, h, t1, t2;
Span <uint> w = stackalloc uint[64];
ref byte wRef = ref Unsafe.As <uint, byte>(ref MemoryMarshal.GetReference(w));
