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 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);
}