Initial commit

.gitignore

@@ -0,0 +1 @@
+/target

Cargo.toml

@@ -0,0 +1,2 @@
+[workspace]
+members=["defangify", "refangify"]

README.md

@@ -0,0 +1,11 @@
+# Defangify
+
+Defangify IOCs (ips, emails, urls, etc)
+
+## Usage
+
+```defangify something@somewhere.com```
+
+## Notes
+
+Still a work in progress...

defangify/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "defangify"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+regex = "1"
+lazy_static = "1"

defangify/src/main.rs

@@ -0,0 +1,63 @@
+use lazy_static::lazy_static;
+use regex::Regex;
+use std::env;
+
+lazy_static! {
+    // Replacers
+    static ref DOTS_REGEX: Regex = Regex::new(r"\.").unwrap();
+    static ref COLONS_REGEX: Regex = Regex::new(r":").unwrap();
+    static ref AT_REGEX: Regex = Regex::new(r"@").unwrap();
+    static ref HTTP_REGEX: Regex = Regex::new(r"(?i)http").unwrap();
+    static ref SLASHES_REGEX: Regex = Regex::new(r"://").unwrap();
+
+    // Matchers
+    static ref EMAIL_REGEX: Regex = Regex::new(r"(?i)([A-Za-z0-9!#$%&'*+/=?^_{|.}~-]+@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?)").unwrap();
+    static ref IPV4_REGEX: Regex = Regex::new(r"(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)").unwrap();
+    static ref IPV6_REGEX: Regex = Regex::new(r"(?:(?:(?:[0-9A-Fa-f]{1,4}:){7}(?:[0-9A-Fa-f]{1,4}|:))|(?:(?:[0-9A-Fa-f]{1,4}:){6}(?::[0-9A-Fa-f]{1,4}|(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(?:(?:[0-9A-Fa-f]{1,4}:){5}(?:(?:(?::[0-9A-Fa-f]{1,4}){1,2})|:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(?:(?:[0-9A-Fa-f]{1,4}:){4}(?:(?:(?::[0-9A-Fa-f]{1,4}){1,3})|(?:(?::[0-9A-Fa-f]{1,4})?:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(?:(?:[0-9A-Fa-f]{1,4}:){3}(?:(?:(?::[0-9A-Fa-f]{1,4}){1,4})|(?:(?::[0-9A-Fa-f]{1,4}){0,2}:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(?:(?:[0-9A-Fa-f]{1,4}:){2}(?:(?:(?::[0-9A-Fa-f]{1,4}){1,5})|(?:(?::[0-9A-Fa-f]{1,4}){0,3}:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(?:(?:[0-9A-Fa-f]{1,4}:){1}(?:(?:(?::[0-9A-Fa-f]{1,4}){1,6})|(?:(?::[0-9A-Fa-f]{1,4}){0,4}:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(?::(?:(?:(?::[0-9A-Fa-f]{1,4}){1,7})|(?:(?::[0-9A-Fa-f]{1,4}){0,5}:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:)))(?:%.+)?\s*").unwrap();
+}
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    let first_email = &args[1];
+    let defangged = defangify(first_email);
+    println!("{}", defangged);
+}
+
+fn defangify(input: &str) -> String {
+    if IPV4_REGEX.is_match(input) {
+        return defang_ipv4(input);
+    } else if IPV6_REGEX.is_match(input) {
+        return defang_ipv6(input);
+    } else if EMAIL_REGEX.is_match(input) {
+        return defangify_email(input)
+    } else {
+        return defangify_url(input);
+    }
+}
+
+fn defangify_url(input: &str) -> String {
+    let no_dots = DOTS_REGEX.replace_all(input, "[.]");
+    let no_http = HTTP_REGEX.replace_all(&no_dots, "hxxp");
+    let no_slashes = SLASHES_REGEX.replace_all(&no_http, "[://]");
+
+    return no_slashes.to_string();
+}
+
+fn defang_ipv4(input: &str) -> String {
+    let no_dots = DOTS_REGEX.replace_all(input, "[.]");
+
+    return no_dots.to_string();
+}
+
+fn defang_ipv6(input: &str) -> String {
+    let no_colons = COLONS_REGEX.replace_all(input, "[:]");
+
+    return no_colons.to_string();
+}
+
+fn defangify_email(input: &str) -> String {
+    let no_dots = DOTS_REGEX.replace_all(input, "[.]");
+    let no_at = AT_REGEX.replace_all(&no_dots, "[@]");
+
+    return no_at.to_string();
+}

refangify/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "refangify"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

refangify/src/main.rs

@@ -0,0 +1,4 @@
+fn main() {
+    // (?:[a-zA-Z]+:\/\/)?[\w]+?(?:\[\.\]|\.)[\w]+?(?:\[\.\]|\.)[\w]+
+    println!("all the fangs!");
+}

src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}