YP4kg6dH

1require 'openssl'
2require 'Base64'
3
4SECRET_KEY = "EY6P1jNkoNSEsvowzlDjZ41HwQfC7abc"
5SECRET_IV = "sP0ZIJ45Ee3aAm7D独弦琴"
6
7MAX_CIPHER_KEY_SIZE = 32
8MAX_CIPHER_IV_SIZE  = 16
9
10def encrypt_uuid(uuid)
11  secretKey = truncate_large_value(SECRET_KEY, MAX_CIPHER_KEY_SIZE)
12  print "truncated secret key >>>> " + secretKey + "\n"
13  secretIv = truncate_large_value(SECRET_IV, MAX_CIPHER_IV_SIZE)
14  print "truncated secret iv >>>> " + secretIv + "\n"
15  cipher = OpenSSL::Cipher.new('aes-256-cbc')
16  cipher.encrypt
17  cipher.key = secretKey
18  cipher.iv = secretIv
19  cipher.padding = 1
20  encrypted      = cipher.update(uuid)
21  encrypted << cipher.final
22  print "encrypted data >>>>> "
23  print encrypted
24  print "\n"
25  euuid = Base64.urlsafe_encode64(encrypted).encode('utf-8')
26  print euuid + + "\n"
27  return euuid
28end
29
30def decrypt_uuid(euuid)
31  print "euuid >>>> " + euuid + "\n"
32  secretKey = truncate_large_value(SECRET_KEY, MAX_CIPHER_KEY_SIZE)
33  print "truncated secret key >>>> " + secretKey + "\n"
34  secretIv = truncate_large_value(SECRET_IV, MAX_CIPHER_IV_SIZE)
35  print "truncated secret iv >>>> " + secretIv + "\n"
36  cipher = OpenSSL::Cipher.new 'aes-256-cbc'
37  cipher.decrypt
38  cipher.padding = 1
39  cipher.key = secretKey
40  cipher.iv = secretIv
41  decrypted = cipher.update(Base64.urlsafe_decode64(euuid))
42  decrypted << cipher.final
43  print decrypted + + "\n"
44  return decrypted
45end
46
47def truncate_large_value(value, max_length)
48  print "before val size >>> " + value.bytesize.to_s + "\n"
49  print "before val >>>>> " + value + "\n"
50  value = value.force_encoding('ASCII')
51  print "after val >>>>> " + value + "\n"
52  print "after val size >>> " + value.bytesize.to_s + "\n"
53  return value if value.bytesize == max_length
54
55  value[0..max_length - 1]
56end
57
58euuid = encrypt_uuid("eec84e94-6408-4850-98ff-ceb3a86f230c")
59decrypt_uuid(euuid)