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Versions: 15
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Stored size: 1.11 KB
Contents
module Xmlenc
module Algorithms
class AESCBC
class << self
def [](size)
new(size)
end
end
def initialize(size)
@size = size
end
def setup(key = nil)
@cipher= nil
@iv = nil
@key = key || cipher.random_key
self
end
def decrypt(cipher_value, options = {})
cipher.decrypt
cipher.padding = 0
cipher.key = @key
cipher.iv = cipher_value[0...iv_len]
result = cipher.update(cipher_value[iv_len..-1]) << cipher.final
padding_size = result.last.unpack('c').first
result[0...-padding_size]
end
def encrypt(data, options = {})
cipher.encrypt
cipher.key = @key
cipher.iv = iv
iv << cipher.update(data) << cipher.final
end
def key
@key
end
private
def iv
@iv ||= cipher.random_iv
end
def iv_len
cipher.iv_len
end
def cipher
@cipher ||= OpenSSL::Cipher::Cipher.new("aes-#{@size}-cbc")
end
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems