Android Question Encrypt Text with B4XCipher

[hanyelmehy]

i need to Encrypt Text with B4XCipher ,save it to sqlite (as string) ,then able to get it back
this code not work with me

Sub MakeText(text As String) As String
    Dim c As B4XCipher,CC() As Byte
    CC=c.Encrypt(text.GetBytes("utf8"),PPWW)
    Return BytesToString(CC,0,CC.Length, "utf8")
End Sub
Sub GetMyText(tx1 As String) As String
    Dim En1() As Byte =tx1.GetBytes("utf8")
   
    Dim c As B4XCipher
    Dim b() As Byte = c.Decrypt(En1,PPWW)
    Return BytesToString(b, 0, b.Length, "utf8")
End Sub

 

[hanyelmehy]

Solved ,this code work

Sub MakeText(text As String) As String
    Dim c As B4XCipher,CC() As Byte
    CC=c.Encrypt(text.GetBytes("UTF-8"),PPWW)
    Dim B64 As StringUtils
    Return B64.EncodeBase64(CC)
End Sub
Sub GetMyText(tx1 As String) As String
    Dim B64 As StringUtils
    Dim En1() As Byte =B64.DecodeBase64(tx1)
    Dim c As B4XCipher
    Dim b() As Byte = c.Decrypt(En1,PPWW)
    Return BytesToString(b, 0, b.Length, "UTF-8")
End Sub

 

[DonManfred]

You should not use BytesToString on the encrypted data. It is not a String.
Convert the encrypted data to base64 and save this base64 string to your Database.

When reading from Database you start with decoding the base64 to a bytearray. Then decrypt this bytearray.

 

[hanyelmehy]

Can you link the b4xcipher i cant find it in the search @-@

[B4X] B4XEncryption

This library allows you to encrypt or decrypt data using the AES encryption method. It is simple to use and it is compatible with B4J jB4XEncryption library and B4i Encryption library (Encrypt and Decrypt method) which means that you can encrypt the data on one platform and decrypt it on a...

www.b4x.com