class Digest::SHA2

(256 bits) in size.
For example, digests produced by Digest::SHA256 will always be 32 bytes

# => 512
Digest::SHA512.new.digest_length * 8
# => 384
Digest::SHA384.new.digest_length * 8
# => 256
Digest::SHA256.new.digest_length * 8

Return the length of the hash value (the digest) in bytes.

digest_obj.digest_length -> Integer
call-seq:

def digest_length
  @sha2.digest_length
end