Added hash decoder

Cargo.toml

@@ -26,6 +26,10 @@ lemmeknow = { version = "0.5", default-features = false }
 include_dir = "0.7.2"
 once_cell = "1.13.0"
 text_io = "0.1.10"
+reqwest = { version = "0.11", features = ["blocking", "json"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+syn = "1.0.40"
 
 [profile.release]
 lto = "fat"

src/decoders/hash_decoder.rs

@@ -0,0 +1,132 @@
+use log::{debug, trace};
+
+use std::collections::HashMap;
+
+use super::interface::Crack;
+use super::interface::Decoder;
+
+use serde::Deserialize;
+
+pub struct HashDecoder;
+
+impl Crack for Decoder<HashDecoder> {
+    fn new() -> Decoder<HashDecoder> {
+        Decoder {
+            name: "hash",
+            description: "A cryptographic hash function is a hash function which takes an input (or 'message') and returns a fixed-size string of bytes. The string is called the 'hash value', 'message digest', 'digital fingerprint', 'digest' or 'checksum'.",
+            link: "https://en.wikipedia.org/wiki/Hash_function",
+            tags: vec!["hash", "decoder"],
+            expected_runtime: 0.8,
+            expected_success: 0.8,
+            failure_runtime: 0.8,
+            normalised_entropy: vec![1.0, 10.0],
+            popularity: 0.4,
+            phantom: std::marker::PhantomData,
+        }
+    }
+
+    fn crack(&self, text: &str) -> Option<String> {
+        trace!("Trying hash with text {:?}", text);
+
+        let decoded_text = decode_hash_no_error_handling(text);
+
+        if decoded_text.is_none() {
+            debug!("Failed to decode hash because HashDecoder::decode_hash_no_error_handling returned None");
+            return None;
+        }
+
+        println!("{}", decoded_text.as_ref().unwrap());
+
+        decoded_text
+    }
+}
+
+fn decode_hash_no_error_handling(text: &str) -> Option<String> {
+    // Runs the code to decode hash
+    // Doesn't perform error handling
+
+    #[derive(Deserialize)]
+    #[serde(rename_all = "camelCase")]
+    struct Data {
+        body: std::collections::HashMap<String, Body>,
+    }
+
+    #[derive(Deserialize)]
+    #[serde(rename_all = "PascalCase")]
+    struct Body {
+        plaintext: String,
+    }
+
+    let mut data = HashMap::new();
+    data.insert("Hash", [&text]);
+
+    let client = reqwest::blocking::Client::new();
+    let resp = client
+        .get("https://av5b81zg3k.execute-api.us-east-2.amazonaws.com/prod/lookup")
+        .json(&data)
+        .send()
+        .unwrap();
+
+    println!("{resp:?}");
+
+    match resp.status() {
+        reqwest::StatusCode::OK => {
+            let mut hash_out: Data = resp.json().ok()?;
+
+            if let Some(result) = hash_out.body.remove(text) {
+                Some(result.plaintext)
+            } else {
+                None
+            }
+        }
+        _ => None,
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::HashDecoder;
+    use crate::decoders::interface::{Crack, Decoder};
+
+    #[test]
+    fn successful_decoding() {
+        let hash_decoder = Decoder::<HashDecoder>::new();
+        let result = hash_decoder
+            .crack("098f6bcd4621d373cade4e832627b4f6")
+            .unwrap();
+
+        assert_eq!(result, "test");
+    }
+
+    #[test]
+    fn hash_decode_handles_panics() {
+        let hash_decoder = Decoder::<HashDecoder>::new();
+        let result = hash_decoder.crack("hello my name is panicky mc panic face!");
+        if result.is_some() {
+            panic!("Decode_base64 did not return an option with Some<t>.")
+        } else {
+            // If we get here, the test passed
+            // Because the base64_decoder.crack function returned None
+            // as it should do for the input
+            assert_eq!(true, true);
+        }
+    }
+
+    #[test]
+    fn hash_handle_panic_if_empty_string() {
+        let hash_decoder = Decoder::<HashDecoder>::new();
+        let result = hash_decoder.crack("");
+        if result.is_some() {
+            assert_eq!(true, true);
+        }
+    }
+
+    #[test]
+    fn hash_handle_panic_if_emoji() {
+        let hash_decoder = Decoder::<HashDecoder>::new();
+        let result = hash_decoder.crack("😂");
+        if result.is_some() {
+            assert_eq!(true, true);
+        }
+    }
+}

src/decoders/mod.rs

@@ -6,5 +6,6 @@
 //! you will also need to make it a public module in this file.
 
 pub mod base64_decoder;
+pub mod hash_decoder;
 pub mod interface;
 pub mod reverse_decoder;

src/lib.rs

@@ -1,7 +1,7 @@
 //! Ares is an automatic decoding and cracking tool.
 
 mod checkers;
-mod decoders;
+pub mod decoders;
 mod filtration_system;
 mod searchers;
 mod storage;