mgomes / blake2b Goto Github PK
View Code? Open in Web Editor NEWA cryptographic hash function faster than MD5, SHA-1, SHA-2, and SHA-3
License: GNU General Public License v3.0
A cryptographic hash function faster than MD5, SHA-1, SHA-2, and SHA-3
License: GNU General Public License v3.0
Other hashes like SHA512 or MD5 support creating a hash from an IO stream.
This allows you to take input at a remote network location, and create a hash for it reading it a chunk at a time, without having to write it to disk first, or ever have to keep it in it's entirety in memory, and creating the digest as you go.
For instance, with stdlib:
secret = Digest::SHA256.new
source.each { |chunk| secret.update(chunk) }
secret.digest
(I think I understand that this will not actually hold the whole source in memory, although correct me if I'm wrong!)
Is this possible with the blake2b algorithm? Could it be made possible with this gem?
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