B4J Question B4JEncryption lilbrary error

[victormedranop]

Hi I'm traying to use this library but I got this error using the same sample functions.
the release of this library is 1.0

   Dim encryptedData() As Byte = EncryptText(root.Get("DATA"),"xx1100")
   Log(DecryptText(encryptedData,"xx1100"))

Sub EncryptText(ff As String, XPASSWORD As String) As Byte()
 Dim c As B4XCipher
 Return c.Encrypt(ff.GetBytes("utf8"), XPASSWORD)
End Sub
Sub DecryptText(EncryptedData() As Byte, XPASSWORD As String) As String
 Dim c As B4XCipher
 Dim b() As Byte = c.Decrypt(EncryptedData, XPASSWORD)
 Return BytesToString(b, 0, b.Length, "utf8")
End Sub

B4J Version: 6.51
Parsing code. (0.03s)
Building folders structure. (0.03s)
Compiling code. (0.17s)
Compiling layouts code. (0.00s)
Organizing libraries. (0.00s)
Compiling generated Java code. Error
B4J line: 1182
Dim b() As Byte = c.Decrypt(EncryptedData, XPASSW
javac 1.8.0_171
src\net\nowyouseeme\pmultiples\clientconnect.java:1640: error: cannot access DataLengthException
_b = _c.Decrypt(_encrypteddata,_xpassword);
^
class file for org.bouncycastle.crypto.DataLengthException not found

 

[victormedranop]

Found it.
These two methods depend on an encryption library named Bouncy Castle. Android includes this library as part of the OS.
In B4J you need to download the jar file: https://www.bouncycastle.org/download/bcprov-jdk15on-154.jar and copy it to the additional libraries folder.

 

[Erel]

See the library very short documentation: https://www.b4x.com/android/forum/threads/jb4xencryption.48178/