- Defined in:
This encryption method is reversible if you have the supplied key. So in order to use this encryption method you must supply it with a key first. In an initializer, or before your application initializes, you should do the following:
Authlogic::CryptoProviders::AES256.key = "my really long and unique key, preferrable a bunch of random characters"
My final comment is that this is a strong encryption method, but its main weakness is that its reversible. If you do not need to reverse the hash then you should consider Sha512 or BCrypt instead.
Keep your key in a safe place, some even say the key should be stored on a separate server. This won't hurt performance because the only time it will try and access the key on the separate server is during initialization, which only happens once. The reasoning behind this is if someone does compromise your server they won't have the key also. Basically, you don't want to store the key with the lock.
Class Attribute Summary collapse
.key ⇒ Object
Sets the attribute key.
Class Method Summary collapse
Class Attribute Details
.key=(value) ⇒ Object (writeonly)
Sets the attribute key
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# File 'lib/authlogic/crypto_providers/aes256.rb', line 21 def key=(value) @key = value end
Class Method Details
.encrypt(*tokens) ⇒ Object
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# File 'lib/authlogic/crypto_providers/aes256.rb', line 23 def encrypt(*tokens) aes.encrypt aes.key = @key [aes.update(tokens.join) + aes.final].pack("m").chomp end
.matches?(crypted, *tokens) ⇒ Boolean
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# File 'lib/authlogic/crypto_providers/aes256.rb', line 29 def matches?(crypted, *tokens) aes.decrypt aes.key = @key (aes.update(crypted.unpack("m").first) + aes.final) == tokens.join rescue OpenSSL::CipherError false end