diff --git a/Cargo.lock b/Cargo.lock
index 31a0ce8..841e351 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -515,6 +515,7 @@ dependencies = [
  "mysql",
  "percent-encoding",
  "serde",
+ "sha1",
  "yaml-rust",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index 5ee8e40..76595ec 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,4 +15,5 @@ serde = "1.0.110"
 futures = "0.3.5"
 encoding_rs = "0.8.23"
 percent-encoding = "2.1.0"
-mailchecker = "3.3.6"
\ No newline at end of file
+mailchecker = "3.3.6"
+sha1 = "0.6.0"
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
index 0b18cbf..b0092f8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,5 +2,6 @@ pub mod data;
 pub mod helpers;
 pub mod controllers;
 pub mod api_data;
+pub mod utils;
 
 pub mod database_structure;
\ No newline at end of file
diff --git a/src/utils/crypt_utils.rs b/src/utils/crypt_utils.rs
new file mode 100644
index 0000000..021c5f7
--- /dev/null
+++ b/src/utils/crypt_utils.rs
@@ -0,0 +1,47 @@
+//! # Cryptographic utilities
+//!
+//! Author: Pierre Hubert
+
+extern crate sha1;
+
+use crate::data::error::{ResultBoxError, ExecError};
+
+/// Generate a new sha1 string
+///
+/// ```
+/// use comunic_server::utils::crypt_utils::sha1_str;
+///
+/// let res = sha1_str("secret");
+/// assert_eq!(res, "e5e9fa1ba31ecd1ae84f75caaa474f3a663f05f4");
+/// ```
+pub fn sha1_str(input: &str) -> String {
+    sha1::Sha1::from(input).digest().to_string()
+}
+
+/// One-way user password crypt
+///
+/// This method will have to be replaced by a stronger algorithm once this implementation is
+/// completely built.
+///
+/// It currently depends on PHP
+///
+/// ```
+/// use comunic_server::utils::crypt_utils::crypt_pass;
+///
+/// let res = crypt_pass("secret").unwrap();
+/// assert_eq!(res, "e5GUe5kdeUMGs");
+/// ```
+pub fn crypt_pass(pass: &str) -> ResultBoxError<String> {
+    let hash = sha1_str(pass);
+
+    let result = std::process::Command::new("/usr/bin/php")
+        .arg("-r")
+        .arg(format!("echo crypt('{}', '{}');", hash, hash))
+        .output()?;
+
+    if !result.status.success() {
+        return Err(ExecError::boxed_new("Failed to crypt password!"));
+    }
+
+    Ok(String::from_utf8(result.stdout)?)
+}
\ No newline at end of file
diff --git a/src/utils/mod.rs b/src/utils/mod.rs
new file mode 100644
index 0000000..632812e
--- /dev/null
+++ b/src/utils/mod.rs
@@ -0,0 +1,5 @@
+//! # Utilities
+//!
+//! This module contains utilities that can be used anywhere in the code
+
+pub mod crypt_utils;
\ No newline at end of file