private static byte[] GetHash(byte[] input) { if (input == null) { throw new ArgumentNullException(nameof(input), "Unable to calculate hash over null input data"); } AbcdStruct abcdValue = new AbcdStruct { A = 0x67452301, B = 0xefcdab89, C = 0x98badcfe, D = 0x10325476 }; int ibStart = 0; while (ibStart <= (input.Length - 0x40)) { GetHashBlock(input, ref abcdValue, ibStart); ibStart += 0x40; } return(GetHashFinalBlock(input, ibStart, input.Length - ibStart, abcdValue, input.Length * 8L)); }
internal static void GetHashBlock(byte[] input, ref AbcdStruct abcdValue, int ibStart) { uint[] numArray = Converter(input, ibStart); uint a = abcdValue.A; uint b = abcdValue.B; uint c = abcdValue.C; uint d = abcdValue.D; a = R1(a, b, c, d, numArray[0], 7, 0xd76aa478); d = R1(d, a, b, c, numArray[1], 12, 0xe8c7b756); c = R1(c, d, a, b, numArray[2], 0x11, 0x242070db); b = R1(b, c, d, a, numArray[3], 0x16, 0xc1bdceee); a = R1(a, b, c, d, numArray[4], 7, 0xf57c0faf); d = R1(d, a, b, c, numArray[5], 12, 0x4787c62a); c = R1(c, d, a, b, numArray[6], 0x11, 0xa8304613); b = R1(b, c, d, a, numArray[7], 0x16, 0xfd469501); a = R1(a, b, c, d, numArray[8], 7, 0x698098d8); d = R1(d, a, b, c, numArray[9], 12, 0x8b44f7af); c = R1(c, d, a, b, numArray[10], 0x11, 0xffff5bb1); b = R1(b, c, d, a, numArray[11], 0x16, 0x895cd7be); a = R1(a, b, c, d, numArray[12], 7, 0x6b901122); d = R1(d, a, b, c, numArray[13], 12, 0xfd987193); c = R1(c, d, a, b, numArray[14], 0x11, 0xa679438e); b = R1(b, c, d, a, numArray[15], 0x16, 0x49b40821); a = R2(a, b, c, d, numArray[1], 5, 0xf61e2562); d = R2(d, a, b, c, numArray[6], 9, 0xc040b340); c = R2(c, d, a, b, numArray[11], 14, 0x265e5a51); b = R2(b, c, d, a, numArray[0], 20, 0xe9b6c7aa); a = R2(a, b, c, d, numArray[5], 5, 0xd62f105d); d = R2(d, a, b, c, numArray[10], 9, 0x2441453); c = R2(c, d, a, b, numArray[15], 14, 0xd8a1e681); b = R2(b, c, d, a, numArray[4], 20, 0xe7d3fbc8); a = R2(a, b, c, d, numArray[9], 5, 0x21e1cde6); d = R2(d, a, b, c, numArray[14], 9, 0xc33707d6); c = R2(c, d, a, b, numArray[3], 14, 0xf4d50d87); b = R2(b, c, d, a, numArray[8], 20, 0x455a14ed); a = R2(a, b, c, d, numArray[13], 5, 0xa9e3e905); d = R2(d, a, b, c, numArray[2], 9, 0xfcefa3f8); c = R2(c, d, a, b, numArray[7], 14, 0x676f02d9); b = R2(b, c, d, a, numArray[12], 20, 0x8d2a4c8a); a = R3(a, b, c, d, numArray[5], 4, 0xfffa3942); d = R3(d, a, b, c, numArray[8], 11, 0x8771f681); c = R3(c, d, a, b, numArray[11], 0x10, 0x6d9d6122); b = R3(b, c, d, a, numArray[14], 0x17, 0xfde5380c); a = R3(a, b, c, d, numArray[1], 4, 0xa4beea44); d = R3(d, a, b, c, numArray[4], 11, 0x4bdecfa9); c = R3(c, d, a, b, numArray[7], 0x10, 0xf6bb4b60); b = R3(b, c, d, a, numArray[10], 0x17, 0xbebfbc70); a = R3(a, b, c, d, numArray[13], 4, 0x289b7ec6); d = R3(d, a, b, c, numArray[0], 11, 0xeaa127fa); c = R3(c, d, a, b, numArray[3], 0x10, 0xd4ef3085); b = R3(b, c, d, a, numArray[6], 0x17, 0x4881d05); a = R3(a, b, c, d, numArray[9], 4, 0xd9d4d039); d = R3(d, a, b, c, numArray[12], 11, 0xe6db99e5); c = R3(c, d, a, b, numArray[15], 0x10, 0x1fa27cf8); b = R3(b, c, d, a, numArray[2], 0x17, 0xc4ac5665); a = R4(a, b, c, d, numArray[0], 6, 0xf4292244); d = R4(d, a, b, c, numArray[7], 10, 0x432aff97); c = R4(c, d, a, b, numArray[14], 15, 0xab9423a7); b = R4(b, c, d, a, numArray[5], 0x15, 0xfc93a039); a = R4(a, b, c, d, numArray[12], 6, 0x655b59c3); d = R4(d, a, b, c, numArray[3], 10, 0x8f0ccc92); c = R4(c, d, a, b, numArray[10], 15, 0xffeff47d); b = R4(b, c, d, a, numArray[1], 0x15, 0x85845dd1); a = R4(a, b, c, d, numArray[8], 6, 0x6fa87e4f); d = R4(d, a, b, c, numArray[15], 10, 0xfe2ce6e0); c = R4(c, d, a, b, numArray[6], 15, 0xa3014314); b = R4(b, c, d, a, numArray[13], 0x15, 0x4e0811a1); a = R4(a, b, c, d, numArray[4], 6, 0xf7537e82); d = R4(d, a, b, c, numArray[11], 10, 0xbd3af235); c = R4(c, d, a, b, numArray[2], 15, 0x2ad7d2bb); b = R4(b, c, d, a, numArray[9], 0x15, 0xeb86d391); abcdValue.A = a + abcdValue.A; abcdValue.B = b + abcdValue.B; abcdValue.C = c + abcdValue.C; abcdValue.D = d + abcdValue.D; }
internal static byte[] GetHashFinalBlock(byte[] input, int ibStart, int cbSize, AbcdStruct abcd, long len) { byte[] destinationArray = new byte[0x40]; byte[] bytes = BitConverter.GetBytes(len); Array.Copy(input, ibStart, destinationArray, 0, cbSize); destinationArray[cbSize] = 0x80; if (cbSize <= 0x38) { Array.Copy(bytes, 0, destinationArray, 0x38, 8); GetHashBlock(destinationArray, ref abcd, 0); } else { GetHashBlock(destinationArray, ref abcd, 0); destinationArray = new byte[0x40]; Array.Copy(bytes, 0, destinationArray, 0x38, 8); GetHashBlock(destinationArray, ref abcd, 0); } byte[] buffer3 = new byte[0x10]; Array.Copy(BitConverter.GetBytes(abcd.A), 0, buffer3, 0, 4); Array.Copy(BitConverter.GetBytes(abcd.B), 0, buffer3, 4, 4); Array.Copy(BitConverter.GetBytes(abcd.C), 0, buffer3, 8, 4); Array.Copy(BitConverter.GetBytes(abcd.D), 0, buffer3, 12, 4); return buffer3; }
private static byte[] GetHash(byte[] input) { if (input == null) { throw new ArgumentNullException(nameof(input), "Unable to calculate hash over null input data"); } AbcdStruct abcdValue = new AbcdStruct { A = 0x67452301, B = 0xefcdab89, C = 0x98badcfe, D = 0x10325476 }; int ibStart = 0; while (ibStart <= (input.Length - 0x40)) { GetHashBlock(input, ref abcdValue, ibStart); ibStart += 0x40; } return GetHashFinalBlock(input, ibStart, input.Length - ibStart, abcdValue, input.Length * 8L); }
internal static byte[] GetHashFinalBlock(byte[] input, int ibStart, int cbSize, AbcdStruct abcd, long len) { byte[] destinationArray = new byte[0x40]; byte[] bytes = BitConverter.GetBytes(len); Array.Copy(input, ibStart, destinationArray, 0, cbSize); destinationArray[cbSize] = 0x80; if (cbSize <= 0x38) { Array.Copy(bytes, 0, destinationArray, 0x38, 8); GetHashBlock(destinationArray, ref abcd, 0); } else { GetHashBlock(destinationArray, ref abcd, 0); destinationArray = new byte[0x40]; Array.Copy(bytes, 0, destinationArray, 0x38, 8); GetHashBlock(destinationArray, ref abcd, 0); } byte[] buffer3 = new byte[0x10]; Array.Copy(BitConverter.GetBytes(abcd.A), 0, buffer3, 0, 4); Array.Copy(BitConverter.GetBytes(abcd.B), 0, buffer3, 4, 4); Array.Copy(BitConverter.GetBytes(abcd.C), 0, buffer3, 8, 4); Array.Copy(BitConverter.GetBytes(abcd.D), 0, buffer3, 12, 4); return(buffer3); }