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const UPPER_CASE: &str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const LOWER_CASE: &str = "abcdefghijklmnopqrstuvwxyz";
const NUMBERS: &str = "0123456789";
pub fn create(length: usize) -> String {
let mut payload: Vec<String> = Vec::new();
for c in UPPER_CASE.chars() {
for s in LOWER_CASE.chars() {
for n in NUMBERS.chars() {
if payload.len() < length {
payload.push(c.to_string());
}
if payload.len() < length {
payload.push(s.to_string());
}
if payload.len() < length {
payload.push(n.to_string());
}
}
}
}
payload.join("")
}
#[test]
fn test_create() {
let expected = "Aa0Aa1Aa2Aa3Aa4Aa5Aa6Aa7Aa8Aa9Ab0Ab1Ab2Ab3Ab4Ab5Ab";
let actual = create(50);
assert_eq!(expected, actual);
}
pub fn offset(value: &str, flag: bool) -> Option<usize> {
let payload = create(20280);
if let Some(i) = payload.find(value) {
return Some(i);
} else {
if let Ok(h) = u64::from_str_radix(value, 16) {
if let Some(i) = payload.find(&hex2ascii(h, flag)) {
return Some(i);
}
}
return None;
}
}
#[test]
fn test_offset() {
let expected = 26;
let actual = offset("8Aa9", false).unwrap();
assert_eq!(expected, actual);
let expected = 0;
let actual = offset("Aa0", false).unwrap();
assert_eq!(expected, actual);
let expected = 20277;
let actual = offset("Zz9", false).unwrap();
assert_eq!(expected, actual);
}
fn hex2ascii(hex: u64, bigendian_flag: bool) -> String {
let mut s: Vec<String> = Vec::new();
let mut h = hex;
while h != 0 {
s.push(
format!("{}", (h & 0xff) as u8 as char)
);
h >>= 8;
}
if bigendian_flag {
s.reverse();
}
s.join("")
}
#[test]
fn test_hex2ascii() {
let expected = String::from("AAAA");
let actual = hex2ascii(0x41414141, false);
assert_eq!(expected, actual);
let expected = String::from("ABCD");
let actual = hex2ascii(0x44434241, false);
assert_eq!(expected, actual);
let expected = String::from("ABCD");
let actual = hex2ascii(0x41424344, true);
assert_eq!(expected, actual);
}