class PubnubCrypto
Public Class Methods
new(cipher_key)
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# File lib/pubnub_crypto.rb, line 4 def initialize(cipher_key) @alg = "AES-256-CBC" sha256_key = Digest::SHA256.hexdigest(cipher_key) @key = sha256_key.slice(0,32) #puts("\nraw sha cipher_key is: #{cipher_key}") #puts("raw sha cipher_key is: #{sha256_key}") #puts("padded cipher_key is: #{@key}\n") @iv = '0123456789012345' end
Public Instance Methods
decrypt(cipher_text)
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# File lib/pubnub_crypto.rb, line 33 def decrypt(cipher_text) decode_cipher = OpenSSL::Cipher::Cipher.new(@alg) decode_cipher.decrypt decode_cipher.key = @key decode_cipher.iv = @iv plain_text = "" begin undecoded_text = Base64.decode64(cipher_text) plain_text = decode_cipher.update(undecoded_text) plain_text << decode_cipher.final rescue => e return "DECRYPTION_ERROR" end return Yajl.load(plain_text) end
encrypt(message)
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# File lib/pubnub_crypto.rb, line 17 def encrypt(message) aes = OpenSSL::Cipher::Cipher.new(@alg) aes.encrypt aes.key = @key aes.iv = @iv json_message = Yajl.dump(message) cipher = aes.update(json_message) cipher << aes.final Base64.strict_encode64(cipher) end