Function whitespace_padding 

pub fn whitespace_padding(input: &str) -> String

Adds random whitespace padding to bypass simple filters.

Inserts 1-3 spaces after random alphanumeric characters with approximately 33% probability. This breaks up words and patterns while maintaining readability, useful for evading filters that match exact strings.

Use Cases

• WAF Bypass: Evade filters that match continuous patterns
• SQL Injection: Add spaces to bypass detection (SELECT * FROM → S E L E C T * F R O M)
• XSS Testing: Break up script tags (<script> → < s c r i p t >)
• Blue Team: Test whitespace normalization in parsers

Examples

use redstr::whitespace_padding;

let result = whitespace_padding("test");
// Example output: "t e s  t" or "te s t" or "t  e st" (varies each run)
assert!(result.len() >= 4);

// SQL injection with whitespace
let sql = whitespace_padding("SELECT * FROM users");
// Example: "S E L E C T  *  F R O M   u s e r s"

// XSS payload with whitespace
let xss = whitespace_padding("<script>alert(1)</script>");
// Example: "< s c r i p t > a l e r t ( 1 ) < / s c r i p t >"