Sha256: b28c034a9236b69fbecb72e1c7b4fd912e973ae0ac9e4f3be8b9e3f266e6c71e
Contents?: true
Size: 1.39 KB
Versions: 6
Compression:
Stored size: 1.39 KB
Contents
require 'openssl'
require 'digest'
require 'base64'
module Keen
class AESHelperOld
BLOCK_SIZE = 32
class << self
def aes256_decrypt(key, iv_plus_encrypted)
padded_key = pad(key)
unhexed_iv_plus_encrypted = unhexlify(iv_plus_encrypted)
iv = unhexed_iv_plus_encrypted[0, 16]
encrypted = unhexed_iv_plus_encrypted[16, unhexed_iv_plus_encrypted.length]
aes = OpenSSL::Cipher::AES.new(256, :CBC)
aes.decrypt
aes.key = padded_key
aes.iv = iv
aes.update(encrypted) + aes.final
end
def aes256_encrypt(key, plaintext, iv = nil)
raise OpenSSL::Cipher::CipherError.new("iv must be 16 bytes") if !iv.nil? && iv.length != 16
padded_key = pad(key)
aes = OpenSSL::Cipher::AES.new(256, :CBC)
aes.encrypt
aes.key = padded_key
aes.iv = iv unless iv.nil?
iv ||= aes.random_iv
encrypted = aes.update(plaintext) + aes.final
hexlify(iv) + hexlify(encrypted)
end
def hexlify(msg)
msg.unpack('H*')[0]
end
def unhexlify(msg)
[msg].pack('H*')
end
def pad(msg)
missing_chars = msg.length % BLOCK_SIZE
return msg if missing_chars == 0
pad_len = BLOCK_SIZE - missing_chars
padding = pad_len.chr * pad_len
padded = msg + padding
padded
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems