coffer-client adapted to new protocol

.gitignore

@@ -1,4 +1,228 @@
-**target/
+# Created by https://www.gitignore.io/api/vim,rust,linux,emacs,windows,intellij+all,visualstudiocode
+# Edit at https://www.gitignore.io/?templates=vim,rust,linux,emacs,windows,intellij+all,visualstudiocode
+
+### Emacs ###
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+*~
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+
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+# Gradle
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+cmake-build-*/
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+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+### Rust ###
+# Generated by Cargo
+# will have compiled files and executables
+/target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
 **/*.rs.bk
-*.cbor
-*.yaml
+
+### Vim ###
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+# Windows shortcuts
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+# End of https://www.gitignore.io/api/vim,rust,linux,emacs,windows,intellij+all,visualstudiocode

Cargo.lock

@@ -83,8 +83,10 @@ dependencies = [
 name = "coffer-client"
 version = "0.4.0"
 dependencies = [
+ "coffer-common 0.4.0",
  "env_logger 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "exec 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_cbor 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -104,6 +106,7 @@ dependencies = [
  "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_cbor 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "sodiumoxide 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 

coffer-client/Cargo.toml

@@ -17,3 +17,8 @@ serde_yaml = "0.8"
 serde_cbor = "0.10.2"
 # Executing subcommand
 exec = "0.3.1"
+# Lighter alternative to tokio for
+# driving shared frame creation
+futures = "0.3.1"
+
+coffer-common = { path = "../coffer-common" }

coffer-client/src/main.rs

@@ -1,17 +1,19 @@
 #[allow(unused_imports)]
 use log::{debug, error, info, trace, warn};
-
-use std::net::SocketAddr;
-
 use env_logger;
+
 use structopt::StructOpt;
-use std::fs::File;
-use std::error::Error;
-use std::net::TcpStream;
-use std::path::PathBuf;
-use std::io::BufRead;
-use std::io::BufReader;
-use std::io::Write;
+
+use std:: {
+    net::{SocketAddr, TcpStream},
+    error::Error,
+    path::PathBuf,
+    io::{Write, Read},
+    convert::{TryInto, TryFrom}
+};
+
+use coffer_common::certificate::Certificate;
+use coffer_common::coffer::{CofferShard, CofferValue};
 
 #[derive(StructOpt, Debug)]
 struct Args {
@@ -19,9 +21,8 @@ struct Args {
     #[structopt(short, long, parse(try_from_str), env = "COFFER_SERVER_ADDRESS", default_value = "127.0.0.1:9187")]
     server_address: SocketAddr,
 
-    /// Path to the request file sent to the server
-    #[structopt(parse(from_os_str), env = "COFFER_REQUEST", hide_env_values = true)]
-    secrets: PathBuf,
+    #[structopt(short, long, parse(from_os_str), env = "COFFER_CLIENT_CERTIFICATE", hide_env_values = true)]
+    certificate: PathBuf,
 
     /// The subcommand spawned by coffer-client
     cmd: String,
@@ -34,14 +35,39 @@ fn main() -> Result<(), Box<dyn Error>> {
     env_logger::init();
     let args = Args::from_args();
 
-    info!{"Connecting to coffer server"}
-    let stream: TcpStream = TcpStream::connect(args.server_address)?;
+    debug!{"Reading certificate"}
+    let cert = Certificate::new_from_cbor(&args.certificate)?;
 
-    info!{"Parsing key requests"}
-    let keys = parse_from_path(&args.secrets)?;
+    debug!{"Connecting to coffer server"}
+    let mut stream: TcpStream = TcpStream::connect(&args.server_address)?;
 
-    info!{"Reading secrets"}
-    retrieve_secrets(&keys, stream)?;
+    debug!{"Sending hello"}
+    let hello = framed(0x00, cert.public_key());
+    stream.write_all(&hello)?;
+
+    debug!{"Sending get"}
+    let get = framed(0x02, Vec::new());
+    stream.write_all(&get)?;
+
+    debug!{"Reading shard"}
+    let header = read_header(&mut stream).unwrap();
+    let shard = read_message(header.0, &mut stream).unwrap();
+    debug!{"Got encrypted shard {:?}", shard}
+
+    debug!{"Sending bye"}
+    let bye = framed(0x99, Vec::new());
+    stream.write_all(&bye)?;
+
+    debug!{"Decrypting shard"}
+    let shard_clear = cert.open(&shard).unwrap();
+    let shard_de = serde_cbor::from_slice::<CofferShard>(&shard_clear).unwrap();
+
+    debug!{"Setting environment"}
+    for (key, val) in shard_de.0 {
+        if let CofferValue::String(val_s) = val {
+            std::env::set_var(key.trim(), val_s.trim());
+        }
+    }
 
     info!{"Spawning coffer'ed command, reaping coffer"}
     reap_coffer(&args.cmd, &args.cmd_args);
@@ -49,27 +75,6 @@ fn main() -> Result<(), Box<dyn Error>> {
     Err("Could not spawn sub-command".into())
 }
 
-fn retrieve_secrets(keys: &Vec<String>, mut stream: TcpStream) -> Result<(), Box<dyn Error>>{
-    for k in keys {
-        let buf = serde_cbor::to_vec(&k)?;
-        info!{"Sending key request {} as {:?}", k, buf}
-        stream.write_all(&buf.len().to_be_bytes())?;
-        stream.write_all(&buf)?;
-
-        info!{"Reading response"}
-        let mut reader = BufReader::new(&stream); // get buffered reader for line-wise reading from stream
-
-        // read line
-        let mut resp = String::new();
-        reader.read_line(&mut resp)?;
-
-        info!{"Retrieved secret. Setting environment"}
-        std::env::set_var(k.trim(), resp.trim());
-    }
-
-    Ok(())
-}
-
 fn reap_coffer(cmd: &str, args: &Vec<String>) {
     let mut cmd = exec::Command::new(cmd);
 
@@ -80,8 +85,76 @@ fn reap_coffer(cmd: &str, args: &Vec<String>) {
     error!{"Could not execute sub-command {}", err};
 }
 
-fn parse_from_path(path: &PathBuf) -> Result<Vec<String>, Box<dyn Error>> {
-    let sec_file = File::open(path)?;
+pub fn read_header<T>(reader: &mut T) -> Option<(u64, u8)>
+where T: Read
+{
+    let mut header: [u8; 9] = [0u8;9]; // header buffer
+    match reader.read_exact(&mut header)
+    {
+        Ok(_) => debug!{"Read {} bytes for header", 9},
+        Err(err) => {
+            error!{"Error while reading header: {}", err}
+            return None;
+        }
+    }
 
-    Ok(serde_yaml::from_reader::<_, Vec<String>>(sec_file)?)
+    trace!{"Header buffer {:?}", header}
+
+    let msg_size: u64 = u64::from_be_bytes(
+        header[0..8]
+            .try_into()
+            .unwrap());
+
+    let msg_type: u8 = u8::from_be_bytes(
+        header[8..9]
+            .try_into()
+            .unwrap());
+
+    debug!{"Message size: {}, Message type: {}", msg_size, msg_type}
+    Some((msg_size, msg_type))
+}
+
+pub fn read_message<T>(msg_size: u64, reader: &mut T) -> Option<Vec<u8>>
+where T: Read
+{
+    // TODO: possible to use unallocated memory instead?
+    // -> https://doc.rust-lang.org/beta/std/mem/union.MaybeUninit.html
+    // TODO: 32 bit usize? Can't allocate a 64 bit length buffer anyway?
+    let mut message = Vec::with_capacity(msg_size.try_into().unwrap());
+    // need to set the size, because otherwise it is assumed to be 0, since
+    // the vec is allocated but uninitialized at this point, we don't want to
+    // pre-allocate a potentially huge buffer with 0x00, so unsafe set size.
+    unsafe {message.set_len(msg_size.try_into().unwrap());}
+
+    match reader.read_exact(&mut message)
+    {
+        Ok(_) => debug!{"Read {} bytes for message", msg_size},
+        Err(err) => {
+            error!{"Error while reading message: {}", err}
+            return None;
+        }
+    }
+    trace!{"Read message {:?}", message}
+
+    Some(message)
+}
+
+pub fn framed(msg_type: u8, data: Vec<u8>) -> Vec<u8>
+{
+    trace!{"Creating frame for type: {:?}, data: {:?}", msg_type, data}
+
+    // TODO magic number
+    let mut frame: Vec<u8> = Vec::with_capacity(data.len() + 72);
+    unsafe {frame.set_len(8);}
+
+    frame.splice(0..8, u64::try_from(data.len())
+                 .unwrap()
+                 .to_be_bytes()
+                 .iter()
+                 .cloned());
+
+    frame.push(msg_type);
+    frame.extend(&data);
+
+    frame
 }

coffer-common/Cargo.toml

@@ -24,3 +24,5 @@ base64 = "^0.11"
 # Key management/Cryptography
 sodiumoxide = "^0.2"
 seckey = "^0.9"
+#Communication
+tokio = { version="^0.2.9", features = ["full"]}

coffer-companion/src/certificate.rs

@@ -17,6 +17,7 @@ pub fn generate_key(out: PathBuf) {
 
 pub fn info(out: PathBuf) {
     let cert = Certificate::new_from_cbor(out).unwrap();
+
     println!{"Public Key: {}", hex::encode_upper(cert.public_key())}
     println!{"Secret Key: {}", hex::encode_upper(cert.secret_key())}
 }

coffer-companion/src/client.rs

@@ -0,0 +1,110 @@
+#[allow(unused_imports)]
+use log::{debug, error, info, trace, warn};
+
+use std::path::PathBuf;
+use std::convert::{TryFrom, TryInto};
+use std::net::{TcpStream};
+use std::io::{Write, Read};
+
+use coffer_common::certificate::Certificate;
+use coffer_common::coffer::CofferShard;
+
+use serde_cbor;
+
+pub fn print_get(out: PathBuf) {
+    let cert = Certificate::new_from_cbor(out).unwrap();
+
+    let hello = framed(0x00, cert.public_key());
+    let get = framed(0x02, Vec::new());
+    let bye = framed(0x99, Vec::new());
+
+    let mut listener = TcpStream::connect("127.0.0.1:9187").unwrap();
+    listener.write_all(&hello).unwrap();
+
+    listener.write_all(&get).unwrap();
+
+    let header = read_header(&mut listener).unwrap();
+    let shard = read_message(header.0, &mut listener).unwrap();
+    debug!{"Got encrypted shard {:?}", shard}
+
+    listener.write_all(&bye).unwrap();
+
+    let shard_clear = cert.open(&shard).unwrap();
+    let shard_de = serde_cbor::from_slice::<CofferShard>(&shard_clear).unwrap();
+
+    println!{"{:?}", shard_de}
+}
+
+fn framed(msg_type: u8, data: Vec<u8>) -> Vec<u8>
+{
+    trace!{"Creating frame for type: {:?}, data: {:?}", msg_type, data}
+
+    // TODO magic number
+    let mut frame: Vec<u8> = Vec::with_capacity(data.len() + 72);
+    unsafe {frame.set_len(8);}
+
+    frame.splice(0..8, u64::try_from(data.len())
+                 .unwrap()
+                 .to_be_bytes()
+                 .iter()
+                 .cloned());
+
+    frame.push(msg_type);
+    frame.extend(&data);
+
+    frame
+}
+
+fn read_header<T>(reader: &mut T) -> Option<(u64, u8)>
+where T: Read
+{
+    let mut header: [u8; 9] = [0u8;9]; // header buffer
+    match reader.read_exact(&mut header)
+    {
+        Ok(_) => debug!{"Read {} bytes for header", 9},
+        Err(err) => {
+            error!{"Error while reading header: {}", err}
+            return None;
+        }
+    }
+
+    trace!{"Header buffer {:?}", header}
+
+    let msg_size: u64 = u64::from_be_bytes(
+        header[0..8]
+            .try_into()
+            .unwrap());
+
+    let msg_type: u8 = u8::from_be_bytes(
+        header[8..9]
+            .try_into()
+            .unwrap());
+
+    debug!{"Message size: {}, Message type: {}", msg_size, msg_type}
+    Some((msg_size, msg_type))
+}
+
+fn read_message<T>(msg_size: u64, reader: &mut T) -> Option<Vec<u8>>
+where T: Read
+{
+    // TODO: possible to use unallocated memory instead?
+    // -> https://doc.rust-lang.org/beta/std/mem/union.MaybeUninit.html
+    // TODO: 32 bit usize? Can't allocate a 64 bit length buffer anyway?
+    let mut message = Vec::with_capacity(msg_size.try_into().unwrap());
+    // need to set the size, because otherwise it is assumed to be 0, since
+    // the vec is allocated but uninitialized at this point, we don't want to
+    // pre-allocate a potentially huge buffer with 0x00, so unsafe set size.
+    unsafe {message.set_len(msg_size.try_into().unwrap());}
+
+    match reader.read_exact(&mut message)
+    {
+        Ok(_) => debug!{"Read {} bytes for message", msg_size},
+        Err(err) => {
+            error!{"Error while reading message: {}", err}
+            return None;
+        }
+    }
+    trace!{"Read message {:?}", message}
+
+    Some(message)
+}

coffer-companion/src/main.rs

@@ -3,6 +3,7 @@ use structopt::StructOpt;
 
 mod certificate;
 mod encrypt;
+mod client;
 
 #[derive(StructOpt, Debug)]
 enum Args {
@@ -10,7 +11,7 @@ enum Args {
         #[structopt(short, long, parse(from_os_str))]
         out: PathBuf,
         #[structopt(short, long)]
-        info: bool
+        info: bool,
     },
     Encrypt {
         #[structopt(short, long, parse(from_os_str))]
@@ -19,6 +20,10 @@ enum Args {
         yaml: PathBuf,
         #[structopt(short, long, parse(from_os_str))]
         out: PathBuf
+    },
+    Client {
+        #[structopt(short, long, parse(from_os_str))]
+        certificate: PathBuf,
     }
 }
 
@@ -30,6 +35,11 @@ fn main() {
             if info {  certificate::info(out) }
             else { certificate::generate_key(out) }
         }
-        _ => unimplemented![]
+        Args::Encrypt {certificate, yaml, out} => {
+            encrypt::encrypt_yaml(yaml, out, certificate)
+        }
+        Args::Client {certificate} => {
+            client::print_get(certificate)
+        }
     }
 }

coffer-server/src/coffer_map.rs

@@ -74,8 +74,10 @@ impl Coffer for CofferMap {
     {
         let lock = self.read();
 
+        debug!{"Coffer {:?}", *lock}
+
         let coffer_shard = lock.get(shard.as_ref())
-            .ok_or(CofferError::Msg("Shard {} not found"))?;
+            .ok_or(CofferError::Msg("Shard not found"))?;
 
         let mut res = CofferShard(Vec::new());
 

coffer-server/src/main.rs

@@ -33,6 +33,9 @@ struct Args {
     /// Address, the coffer server should bind to
     #[structopt(short, long, parse(try_from_str), env = "COFFER_SERVER_ADDRESS", default_value = "127.0.0.1:9187")]
     address: SocketAddr,
+
+    #[structopt(long, parse(from_os_str))]
+    client: PathBuf
 }
 
 #[tokio::main]
@@ -42,7 +45,12 @@ async fn main() {
 
     _print_banner();
 
-    let keyring = Keyring::new_from_path(&args.certificate);
+    let mut keyring = Keyring::new_from_path(&args.certificate);
+
+    // read in client key
+    let mut client_key = Vec::new();
+    File::open(&args.client).unwrap().read_to_end(&mut client_key).unwrap();
+    keyring.add_known_key(&client_key).unwrap();
 
     // decrypt secrets file and put into coffer
     let mut secrets_file = File::open(&args.secrets).unwrap();

coffer-server/src/protocol.rs

@@ -2,12 +2,9 @@
 use log::{debug, error, info, trace, warn};
 
 use std::sync::Arc;
-use std::convert::{TryFrom, TryInto};
 use std::net::Shutdown;
 
-use tokio::io::{AsyncRead,
-                AsyncReadExt,
-                AsyncWriteExt};
+use tokio::io::AsyncWriteExt;
 use tokio::net::TcpStream;
 
 use serde_cbor;
@@ -16,6 +13,7 @@ use quick_error::quick_error;
 
 use coffer_common::coffer::Coffer;
 use coffer_common::keyring::Keyring;
+
 use hex;
 
 quick_error! {
@@ -84,13 +82,13 @@ where C: Coffer
 
         // TODO restrict msg_size more, otherwise bad client could bring server
         //      to allocate vast amounts of memory
-        let (msg_size, msg_type) = Self::read_header(&mut reader).await
+        let (msg_size, msg_type) = frame::read_header(&mut reader).await
             .unwrap();
 
         // TODO only read message if message expected by message type
         //      currently relies on client sending good message
         //      (0x00 message size)
-        let message = Self::read_message(msg_size, &mut reader).await
+        let message = frame::read_message(msg_size, &mut reader).await
             .unwrap();
 
         match msg_type {
@@ -101,7 +99,54 @@ where C: Coffer
         }
     }
 
-    async fn read_header<T>(reader: &mut T) -> Option<(u64, u8)>
+    async fn transit(&mut self, event: Request)
+    {
+        match (&self.state, event) {
+            (State::Start, Request::Hello(pk)) => {
+                debug!{"Reading public key"}
+                self.client = Some(pk);
+                self.state = State::Link;
+            }
+
+            (State::Link, Request::Get) => {
+                debug!{"Writing response"}
+                let shard_id = hex::encode_upper(self.client.as_ref().unwrap());
+
+                let res = self.coffer
+                    .get_shard(shard_id)
+                    .unwrap();
+
+                let response = self.keyring.seal(
+                        &self.client.as_ref().unwrap(),
+                        &serde_cbor::to_vec(&res).unwrap()
+                    ).unwrap();
+
+                // TODO magic number
+                let frame = frame::framed(0x05u8, response).await;
+                trace!{"OkGet Frame: {:?}", frame}
+                // TODO Proper result handling
+                self.stream.write_all(&frame).await.unwrap();
+                self.stream.flush().await.unwrap();
+
+                self.state = State::Bye;
+            }
+
+            (State::Link, Request::Bye) => self.state = State::End,
+            (State::Bye, Request::Bye) => self.state = State::End,
+
+            _ => self.state = State::End
+        }
+    }
+}
+
+mod frame {
+    #[allow(unused_imports)]
+    use log::{debug, error, info, trace, warn};
+
+    use std::convert::{TryFrom, TryInto};
+    use tokio::io::{AsyncRead, AsyncReadExt};
+
+    pub async fn read_header<T>(reader: &mut T) -> Option<(u64, u8)>
     where T: AsyncRead + Unpin
     {
         let mut header: [u8; 9] = [0u8;9]; // header buffer
@@ -130,7 +175,7 @@ where C: Coffer
         Some((msg_size, msg_type))
     }
 
-    async fn read_message<T>(msg_size: u64, reader: &mut T) -> Option<Vec<u8>>
+    pub async fn read_message<T>(msg_size: u64, reader: &mut T) -> Option<Vec<u8>>
     where T: AsyncRead + Unpin
     {
         // TODO: possible to use unallocated memory instead?
@@ -155,45 +200,7 @@ where C: Coffer
         Some(message)
     }
 
-    async fn transit(&mut self, event: Request)
-    {
-        match (&self.state, event) {
-            (State::Start, Request::Hello(pk)) => {
-                debug!{"Reading public key"}
-                self.client = Some(pk);
-                self.state = State::Link;
-            }
-
-            (State::Link, Request::Get) => {
-                debug!{"Writing response"}
-                let shard_id = hex::encode(self.client.as_ref().unwrap());
-
-                let res = self.coffer
-                    .get_shard(shard_id)
-                    .unwrap();
-
-                let response = self.keyring.seal(
-                        &self.client.as_ref().unwrap(),
-                        &serde_cbor::to_vec(&res).unwrap()
-                    ).unwrap();
-
-                // TODO magic number
-                let frame = Self::framed(0x05u8, response).await;
-                trace!{"OkGet Frame: {:?}", frame}
-                // TODO Proper result handling
-                self.stream.write_all(&frame).await.unwrap();
-
-                self.state = State::Bye;
-            }
-
-            (State::Link, Request::Bye) => self.state = State::End,
-            (State::Bye, Request::Bye) => self.state = State::End,
-
-            _ => self.state = State::End
-        }
-    }
-
-    async fn framed(msg_type: u8, data: Vec<u8>) -> Vec<u8>
+    pub async fn framed(msg_type: u8, data: Vec<u8>) -> Vec<u8>
     {
         trace!{"Creating frame for type: {:?}, data: {:?}", msg_type, data}
 
@@ -212,4 +219,5 @@ where C: Coffer
 
         frame
     }
+
 }

testcoffer/client.cert

@@ -0,0 +1 @@
+¢jpublic_keyX ñ†Õ*p—}†o<E280A0>9¼sÛL¸¬@$<24>öhG[þH­Akprivate_keyX ÃÏÕÏ«øÿÉÑrÄñâhÔïD–I<E28093>„Ä\J<>p

testcoffer/coffer.enc

@@ -0,0 +1 @@
+э┘ш┬s÷В█╢;ДAбG8ЁLeэоh╩zVПхB├&VеLГf╨~ЬН┤B.╧5▓ЛЭK*XЫ·▐~╘П╕╫B`@к,J\Ь}GC2▐K░ПЛd0ф┤v"чЛIAZ6O╩R	⌡KдWБj╡xohНv{╨и╡║c╛CЯшЁКD]░Зу┤?b░Ъ/h▓И┘	≈$Щ7╕p|9²╛°AТЫ$?

testcoffer/coffer.yaml

@@ -0,0 +1,4 @@
+[test]
+id = "F11C86D52A70977D866F813903BC73DB4CB8AC40249DF668475B1BFE48AD1E41"
+key1 = "secret1"
+key2 = "secret2"

testcoffer/server.cert

@@ -0,0 +1 @@
+¢jpublic_keyX 
øûN%ý[#{<7B>‘Pú¤²-®j–fP<66>dx	4Ê[kprivate_keyX M†‚€»ÐÙ™‘â<E28098>ëgkÚ{ú³ÛCMÀ¸>;¿ô~
3d+