#52 argon2 parameters

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cas-lib"
-version = "0.2.67"
+version = "0.2.68"
 edition = "2021"
 description = "A function wrapper layer for RustCrypto and Dalek-Cryptography. Intended to be used in FFI situations with a global heap deallactor at the top level project."
 license = "Apache-2.0"

src/password_hashers/argon2.rs

@@ -1,6 +1,6 @@
 use argon2::{
     password_hash::{rand_core::OsRng, SaltString},
-    Argon2, PasswordHash, PasswordHasher, PasswordVerifier,
+    Argon2, PasswordHash, PasswordHasher, PasswordVerifier, Params
 };
 use rand::RngCore;
 
@@ -9,6 +9,20 @@ pub struct CASArgon;
 
 impl CASArgon {
 
+    /// Hashes a password using Argon2 with custom parameters.
+    /// Returns the hashed password as a string.
+    /// Parameters:
+    /// - memory_cost: Memory cost in kibibytes.
+    /// - iterations: Number of iterations.
+    /// - parallelism: Degree of parallelism.
+    /// - password_to_hash: The password to be hashed.
+    pub fn hash_password_parameters(memory_cost: u32, iterations: u32, parallelism: u32, password_to_hash: String) -> String {
+        let params = Params::new(memory_cost * 1024, iterations, parallelism, None).unwrap();
+        let argon2 = Argon2::new(argon2::Algorithm::Argon2id, argon2::Version::V0x13, params);
+        let salt = SaltString::generate(&mut OsRng);
+        let hash = argon2.hash_password(password_to_hash.as_bytes(), &salt).unwrap();
+        hash.to_string()
+    }
     /// Derives a 128-bit AES key from a password using Argon2.
     /// Returns the derived key as a vector of bytes.
     pub fn derive_aes_128_key(password: Vec<u8>) -> Vec<u8> {

tests/password_hashers.rs

@@ -3,6 +3,14 @@ mod password_hashers {
     use std::path::Path;
     use cas_lib::{password_hashers::{argon2::CASArgon, bcrypt::CASBCrypt, cas_password_hasher::CASPasswordHasher, scrypt::CASScrypt}, symmetric::{aes::{CASAES128, CASAES256}, cas_symmetric_encryption::{CASAES128Encryption, CASAES256Encryption}}};
 
+    #[test]
+    pub fn argon2_hash_with_parameters() {
+        let password = "BadPassword".to_string();
+        let hash = CASArgon::hash_password_parameters(1024, 5, 5, password.clone());
+        let verification = CASArgon::verify_password(hash, password);
+        assert_eq!(true, verification);
+    }
+
     #[test]
     pub fn argon2_derive_aes_128_and_encrypt() {
         let password = b"BadPassword".to_vec(); // do not use this as a password.