Slink is an alphanumeric shellcode (x86) encoder that use simple math operations to reformat characters beyond 7f. The tool creation was inspired by the following sploit EDB-ID: 44455. Here's the list of current features:

• Encode using 01-7f characters set.
• Exclude common bad characters such as \x00\x10\x0a\x0d\x20 by default.
• Make sure shellcode is divisible by 4 by padding with \x90.
• Accept mutiple shellcode formats as input.
• Specify shellcode variable name.
• Output encoded shellcode.
• Output shellcode final size.

The following demo shows Slink in action.

Chanelog:
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Version 1.1 (June 2018)
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- Add the ability to specify shellcode variable. 
- Add final shellcode size.
- Bug fixes.
- Code optimazation.

Version 1.0 (April 2018)
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Initial release!