CODEWITHSUNDEEP
asp.net.net
Jonnymaboy
Jonnymaboy

Reputation: 543

custom base 64 not using .net FromBase64String

I need to encrypt decrypt a string. using base 64 with custom characters well one custom character chr(255) (-). I would like to use the built in ,net FromBase64String but it errors with invalid characters. If i use the below code (see link) and change the character / to - it works. Any ideas to make this work using .nets built in functions.

http://www.freevbcode.com/ShowCode.asp?ID=5248.

Thanks all

Upvotes: 0

Views: 106

Answers (1)

Jim Mischel
Jim Mischel

Reputation: 133995

This is normally done with a function that does a string.Replace, like this:

public string CustomToBase64String(byte[] data)
{
    var s = Convert.ToBase64String(data);
    return s.Replace('/', (char)255);
}

public byte[] CustomFromBase64String(string s)
{
    var changed = s.Replace((char)255, '/');
    return Convert.FromBase64String(s);
}

Upvotes: 1

Related Questions