1 files changed, 0 insertions, 212 deletions
diff --git a/src/client.rs b/src/client.rs
deleted file mode 100644
index 4348f4f..0000000
--- a/src/client.rs
+++ /dev/null
@@ -1,212 +0,0 @@
-//! SRP client implementation.
-//! 
-//! # Usage
-//! First create SRP client struct by passing to it SRP parameters (shared
-//! between client and server) and randomly generated `a`:
-//! 
-//! ```ignore
-//! use srp::groups::G_2048;
-//! use sha2::Sha256;
-//!
-//! let a = rng.gen_iter::<u8>().take(64).collect::<Vec<u8>>();
-//! let client = SrpClient::<Sha256>::new(&a, &G_2048);
-//! ```
-//! 
-//! Next send handshake data (username and `a_pub`) to the server and receive
-//! `salt` and `b_pub`:
-//! 
-//! ```ignore
-//! let a_pub = client.get_a_pub();
-//! let (salt, b_pub) = conn.send_handshake(username, a_pub);
-//! ```
-//! 
-//! Compute private key using `salt` with any password hashing function.
-//! You can use method from SRP-6a, but it's recommended to use specialized
-//! password hashing algorithm instead (e.g. PBKDF2, argon2 or scrypt).
-//! Next create verifier instance, note that `get_verifier` consumes client and
-//! can return error in case of malicious `b_pub`.
-//! 
-//! ```ignore
-//! let private_key = srp_private_key::<Sha256>(username, password, salt);
-//! let verifier = client.get_verifier(&private_key, &b_pub)?;
-//! ```
-//!
-//! Finally verify the server: first generate user proof,
-//! send it to the server and verify server proof in the reply. Note that
-//! `verify_server` method will return error in case of incorrect server reply.
-//! 
-//! ```ignore
-//! let user_proof = verifier.get_proof();
-//! let server_proof = conn.send_proof(user_proof);
-//! let key = verifier.verify_server(server_proof)?;
-//! ```
-//! 
-//! `key` contains shared secret key between user and the server. Alternatively
-//! you can directly extract shared secret key using `get_key()` method and
-//! handle authentification through different (secure!) means (e.g. by using
-//! authentificated cipher mode).
-//! 
-//! For user registration on the server first generate salt (e.g. 32 bytes long)
-//! and get password verifier which depends on private key. Send useranme, salt
-//! and password verifier over protected channel to protect against MitM for
-//! registration.
-//! 
-//! ```ignore
-//! let pwd_verifier = client.get_password_verifier(&private_key);
-//! conn.send_registration_data(username, salt, pwd_verifier);
-//! ```
-
-//let buf = rng.gen_iter::<u8>().take(l).collect::<Vec<u8>>();
-use std::marker::PhantomData;
-
-use num::{BigUint, Zero};
-use digest::Digest;
-use generic_array::GenericArray;
-
-use tools::powm;
-use types::{SrpAuthError, SrpGroup};
-
-/// SRP client state before handshake with the server.
-pub struct SrpClient<'a, D: Digest> {
-    params: &'a SrpGroup,
-
-    a: BigUint,
-    a_pub: BigUint,
-
-    d: PhantomData<D>
-}
-
-/// SRP client state after handshake with the server.
-pub struct SrpClientVerifier<D: Digest> {
-    proof: GenericArray<u8, D::OutputSize>,
-    server_proof: GenericArray<u8, D::OutputSize>,
-    key: GenericArray<u8, D::OutputSize>,
-}
-
-/// Compute user private key as described in the RFC 5054. Consider using proper
-/// password hashing algorithm instead.
-pub fn srp_private_key<D: Digest>(username: &[u8], password: &[u8], salt: &[u8])
-    -> GenericArray<u8, D::OutputSize>
-{
-    let p = {
-        let mut d = D::new();
-        d.input(username);
-        d.input(b":");
-        d.input(password);
-        d.result()
-    };
-    let mut d = D::new();
-    d.input(salt);
-    d.input(&p);
-    d.result()
-}
-
-impl<'a, D: Digest> SrpClient<'a, D> {
-    /// Create new SRP client instance.
-    pub fn new(a: &[u8], params: &'a SrpGroup) -> Self {
-        let a = BigUint::from_bytes_be(a);
-        let a_pub = params.powm(&a);
-
-        Self { params, a, a_pub, d: Default::default() }
-    }
-
-    /// Get password verfier for user registration on the server
-    pub fn get_password_verifier(&self, private_key: &[u8]) -> Vec<u8> {
-        let x = BigUint::from_bytes_be(&private_key);
-        let v = self.params.powm(&x);
-        v.to_bytes_be()
-    }
-
-    fn calc_key(&self, b_pub: &BigUint, x: &BigUint, u: &BigUint)
-        -> GenericArray<u8, D::OutputSize>
-    {
-        let n = &self.params.n;
-        let k = self.params.compute_k::<D>();
-        let interm = (k * self.params.powm(x)) % n;
-        // Because we do operation in modulo N we can get: (kv + g^b) < kv
-        let v = if b_pub > &interm {
-            (b_pub - &interm) % n
-        } else {
-            (n + b_pub - &interm) % n
-        };
-        // S = |B - kg^x| ^ (a + ux)
-        let s = powm(&v, &(&self.a + (u*x) % n ), n);
-        D::digest(&s.to_bytes_be())
-    }
-
-    /// Process server reply to the handshake.
-    pub fn process_reply(self, private_key: &[u8], b_pub: &[u8])
-        -> Result<SrpClientVerifier<D>, SrpAuthError>
-    {
-        let u = {
-            let mut d = D::new();
-            d.input(&self.a_pub.to_bytes_be());
-            d.input(b_pub);
-            BigUint::from_bytes_be(&d.result())
-        };
-
-        let b_pub = BigUint::from_bytes_be(b_pub);
-
-        // Safeguard against malicious B
-        if &b_pub % &self.params.n == BigUint::zero() {
-            return Err(SrpAuthError{ description: "Malicious b_pub value" })
-        }
-
-        let x = BigUint::from_bytes_be(&private_key);
-        let key = self.calc_key(&b_pub, &x, &u);
-        // M1 = H(A, B, K)
-        let proof = {
-            let mut d = D::new();
-            d.input(&self.a_pub.to_bytes_be());
-            d.input(&b_pub.to_bytes_be());
-            d.input(&key);
-            d.result()
-        };
-
-        // M2 = H(A, M1, K)
-        let server_proof = {
-            let mut d = D::new();
-            d.input(&self.a_pub.to_bytes_be());
-            d.input(&proof);
-            d.input(&key);
-            d.result()
-        };
-
-        Ok(SrpClientVerifier {
-            proof: proof,
-            server_proof: server_proof,
-            key: key,
-        })
-    }
-
-    /// Get public ephemeral value for handshaking with the server.
-    pub fn get_a_pub(&self) -> Vec<u8> {
-        self.a_pub.to_bytes_be()
-    }
-}
-
-impl<D: Digest> SrpClientVerifier<D> {
-    /// Get shared secret key without authenticating server, e.g. for using with
-    /// authenticated encryption modes. DO NOT USE this method without
-    /// some kind of secure authentification.
-    pub fn get_key(self) -> GenericArray<u8, D::OutputSize> {
-        self.key
-    }
-
-    /// Verification data for sending to the server.
-    pub fn get_proof(&self) -> GenericArray<u8, D::OutputSize> {
-        self.proof.clone()
-    }
-
-    /// Verify server reply to verification data. It will return shared secret
-    /// key in case of success.
-    pub fn verify_server(self, reply: &[u8])
-        -> Result<GenericArray<u8, D::OutputSize>, SrpAuthError>
-    {
-        if self.server_proof.as_slice() != reply {
-            Err(SrpAuthError{ description: "Incorrect server proof" })
-        } else {
-            Ok(self.key)
-        }
-    }
-}