roEVPCipher : Setup working for blowfish, but not for aes

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1

I am trying to use roEVPCipher method to encrypt my data using aes-128-ecb cipher,
But Its failing in initial setup only, Setup returns error code as -1


cipher_obj = CreateObject("roEVPCipher")
ret = cipher_obj.Setup(true, "aes-128-ecb", "0123456789abcdef", "", 0)
if ret <> 0
       print "Setup Error" ; ret
end if

The similar code is working properly for blowfish cipher encryption


cipher_obj = CreateObject("roEVPCipher")
ret = cipher_obj.Setup(true, "bf", "7B1CB530521E7554D623E1412A2CF29F", "785BC65A9D7850FD", 0)
if ret <> 0
       print "Setup Error" ; ret
end if

Please suggest me, how to use aes-128-ecb cipher encryption

2

You may want to post this to the developer forum rather than here on the general user forum.

3

The problem is with the key you’re trying to use. When using aes-128, you need to use a 128 bit hex encoded key.

4

Thanks Guys, Now its working fine with 128 bit hex encoded key

5

I am unable to figure out how to use AES 128 encryption. Roku box keeps rebooting in most of the attempts. Otherwise, setup call returns -1. It is working perfectly fine if I use “bf”.

Appreciate your help.

here is my code snippet:

  
    alg = "aes-128-cbc"
    'alg = "bf"
    pad = 1 
    encryptKey = "10a58869d74be5a374cf867cfb473859"
    IV = "00000000000000000000000000000000"
    plainText = "00000000000000000000000000000000"

    encResult = crypto_encrypt(alg, encryptKey, IV, plainText, pad)
    

Function crypto_encrypt(alg as String, encryptKey As String, IV As String, text As String, pad as Integer) As String

   crypto = CreateObject("roEVPCipher")
   res = crypto.Setup(true, alg,encryptKey,IV,pad)
   print res
   
   ba = CreateObject("roByteArray")
   ba.FromAsciiString(text)

   enc = crypto.Process(ba)
   
   return (enc.ToHexString())
   
End function
6

“manuthepassion” wrote:
Thanks Guys, Now its working fine with 128 bit hex encoded key

How were you able to encode your ascii string to a 128-bit hex key? I’ve been creating a roByteArray from ascii and then outputting a hex string, but I’m not getting my roEVPCipher setup yet…