static Word64[] CreateMessageScheduleSha512(Block1024 block)
{
// The message schedule.
Word64[] W = new Word64[80];
// Prepare the message schedule W.
// The first 16 words in W are the same as the words of the block.
// The remaining 80-16 =64 words in W are functions of the previously defined words.
for (int t = 0; t < 80; t++)
{
if (t < 16)
{
W[t] = block.words[t];
}
else
{
W[t] = sigma1_512(W[t - 2]) + W[t - 7] + sigma0_512(W[t - 15]) + W[t - 16];
}
}
return(W);
}
static Block1024[] ConvertPaddedMessageToBlock1024Array(byte[] M)
{
// We are assuming M is padded, so the number of bits in M is divisible by 1024
int numberBlocks = (M.Length * 8) / 1024; // same as: M.Length / 128
Block1024[] blocks = new Block1024[numberBlocks];
for (int i = 0; i < numberBlocks; i++)
{
// First extract the relavant subarray from M
byte[] B = new byte[128]; // 128 * 8 = 1024
for (int j = 0; j < 128; j++)
{
B[j] = M[i * 128 + j];
}
Word64[] words = ShaUtilities.ByteArrayToWord64Array(B);
blocks[i] = new Block1024(words);
}
return(blocks);
}