It has been. Since SHA-256 calculates the hash value by dividing the input for each 512 bits, it is necessary to pad the size of the bit string calculated in 'message.rb' to be a multiple of 512.

It is possible to find part of a string by using a subString (a bit, or part, of a string) method. Remember that the first character in the string starts at reference 0. For example, select a ...