From cd894c27e0b0d5746b95b9c2933da3ba6e9a3f5b Mon Sep 17 00:00:00 2001
From: Jesse Luehrs <doy@tozt.net>
Date: Sun, 5 Apr 2020 02:17:25 -0400
Subject: basic implementation of the cryptographic stuff

---
 src/identity.rs | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 src/identity.rs

(limited to 'src/identity.rs')

diff --git a/src/identity.rs b/src/identity.rs
new file mode 100644
index 0000000..85b4853
--- /dev/null
+++ b/src/identity.rs
@@ -0,0 +1,44 @@
+use crate::prelude::*;
+
+pub struct Identity {
+    pub email: String,
+    pub enc_key: Vec<u8>,
+    pub mac_key: Vec<u8>,
+    pub master_password_hash: Vec<u8>,
+}
+
+impl Identity {
+    pub fn new(email: &str, password: &str, iterations: u32) -> Result<Self> {
+        let mut key = vec![0u8; 32];
+        pbkdf2::pbkdf2::<hmac::Hmac<sha2::Sha256>>(
+            password.as_bytes(),
+            email.as_bytes(),
+            iterations as usize,
+            &mut key,
+        );
+
+        let mut hash = vec![0u8; 32];
+        pbkdf2::pbkdf2::<hmac::Hmac<sha2::Sha256>>(
+            &key,
+            password.as_bytes(),
+            1,
+            &mut hash,
+        );
+
+        let hkdf = hkdf::Hkdf::<sha2::Sha256>::from_prk(&key)
+            .map_err(|_| Error::HkdfFromPrk)?;
+        hkdf.expand(b"enc", &mut key)
+            .map_err(|_| Error::HkdfExpand)?;
+
+        let mut mac_key = vec![0u8; 32];
+        hkdf.expand(b"mac", &mut mac_key)
+            .map_err(|_| Error::HkdfExpand)?;
+
+        Ok(Self {
+            email: email.to_string(),
+            enc_key: key,
+            mac_key,
+            master_password_hash: hash,
+        })
+    }
+}
-- 
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