問題描述:
# abcdefgHabcdefgH => ["ec3f23575fea50b2ec3f23575fea50b29eda321f26b6909f"](7D8jV1/qULLsPyNXX+pQsp7aMh8mtpCf) key:`abcdefgH12345678` OK
# abcdefgHabcdefgH => ["ec3f23575fea50b2ec3f23575fea50b2"](7D8jV1/qULLsPyNXX+pQsg==) key:`abcdefgH12345678` OK
原因:
填充方法的使用問題
解決後的代碼:
明文的長度必須是8的整數倍,否則會報錯::in `final': data not multiple of block length (OpenSSL::Cipher::CipherError)
require 'openssl'
module Des3
# puts OpenSSL::Cipher.ciphers
def self.cipher(mode, key , data)
# cipher = OpenSSL::Cipher.new('DES-EDE3-CBC').send(mode)
# cipher = OpenSSL::Cipher.new('DES-EDE3').send(mode) # 192 bits KEY
cipher = OpenSSL::Cipher.new('DES-EDE').send(mode) # 128 bits key
# cipher = OpenSSL::Cipher.new('DES3').send(mode) # 192 bits KEY
cipher.key = key
cipher.padding =0 #!!! 0:加密後不會多出8bytes
# key:`abcdefgH12345678`, `abcdefgHabcdefgH`` => `["ec3f23575fea50b2ec3f23575fea50b2"]`(7D8jV1/qULLsPyNXX+pQsg==) OK
# key:`abcdefgH12345678`, `abcdefgHabcdefgH`` => `["ec3f23575fea50b2ec3f23575fea50b29eda321f26b6909f"]`(7D8jV1/qULLsPyNXX+pQsp7aMh8mtpCf) OK
encrypted = ''
encrypted << cipher.update(data)
encrypted << cipher.final
encrypted
end
def self.encrypt(key, data)
cipher(:encrypt, key, data)
end
def self.decrypt(key, data)
cipher(:decrypt, key, data)
end
end
def test_case(dat)
key, data, dataExpected = dat[:key], dat[:data], dat[:dataExpected].downcase.gsub(" ","")
dataEnrypted = Des3::encrypt(key ,data)
dataDecrypted = Des3::decrypt(key ,dataEnrypted)
print("key:`#{key}` `#{data}` => 0x:#{dataEnrypted.unpack("H*")[0]} #{dataDecrypted==data ? 'OK' : "FAIL"} #{dataExpected==dataEnrypted.unpack("H*")[0] ? 'OK' : "FAIL(Expected:#{dataExpected})"} \n")
puts " key0x:#{key.unpack("H*")[0]}, 0x:#{data.unpack("H*")[0]} => 0x:#{dataEnrypted.unpack("H*")[0]} #{dataDecrypted==data ? 'OK' : 'FAIL'} #{dataExpected==dataEnrypted.unpack("H*")[0] ? 'OK' : 'FAIL'} "
end
def unit_test
dat1=[
{key:"abcdefgH12345678", data:"abcdefgHabcdefgH", dataExpected:"ec3f23575fea50b2ec3f23575fea50b2"},
{key:"\x12\x34\x56\x78\x90\x12\x34\x56\xab\xcd\xef\x12\x34\x56\x78\x90",data:"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",dataExpected:"c4 fe a9 c5 6c 89 64 11 c4 fe a9 c5 6c 89 64 11"},
]
dat1.each do |dat| test_case(dat) end
end
unit_test
運行結果
key:`abcdefgH12345678` `abcdefgHabcdefgH` => 0x:ec3f23575fea50b2ec3f23575fea50b2 OK OK
key0x:61626364656667483132333435363738, 0x:61626364656667486162636465666748 => 0x:ec3f23575fea50b2ec3f23575fea50b2 OK OK
key:`4Vx�4V���4Vx�` ` ` => 0x:c4fea9c56c896411c4fea9c56c896411 OK OK
key0x:1234567890123456abcdef1234567890, 0x:00000000000000000000000000000000 => 0x:c4fea9c56c896411c4fea9c56c896411 OK OK