0.2.3

use await-dev per default
update & tidy readme
2020-01-20 22:43:06 +01:00 · 2020-01-16 19:41:59 +01:00 · 2020-01-15 16:46:15 +01:00 · 2020-01-13 23:23:45 +01:00 · 2020-01-13 21:54:09 +01:00 · 2020-01-13 17:44:51 +01:00
13 changed files with 403 additions and 130 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -24,11 +24,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"

 [[package]]
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@@ -44,16 +44,16 @@ dependencies = [

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@@ -77,7 +77,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"

 [[package]]
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 [[package]]
@@ -87,7 +87,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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 "checksum vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
 "checksum winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,17 +1,26 @@
 [package]
 name = "fido2luks"
-version = "0.2.0"
+version = "0.2.3"
 authors = ["shimunn <shimun@shimun.net>"]
 edition = "2018"

+description = "Decrypt your LUKS partition using a FIDO2 compatible authenticator"
+documentation = "https://github.com/shimunn/fido2luks/blob/master/README.md"
+homepage = "https://github.com/shimunn/fido2luks"
+repository = "https://github.com/shimunn/fido2luks"
+readme = "README.md"
+keywords = ["luks", "fido2", "u2f"]
+categories = ["command-line-utilities"]
+license-file = "LICENSE"
+
 [dependencies]
-ctap = { git = "https://github.com/shimunn/ctap.git", branch = "hmac_ext" }
-#cryptsetup-rs = "0.2.0"
-cryptsetup-rs = { git = "https://github.com/shimunn/cryptsetup-rs.git", branch = "update_keyslot" }
-libcryptsetup-sys = { git = "https://github.com/shimunn/cryptsetup-rs.git", branch = "update_keyslot" }
+ctap_hmac = "0.2.1"
+cryptsetup-rs = "0.2.1"
+libcryptsetup-sys = "0.1.2"
+

 hex = "0.3.2"
-rust-crypto = "0.2.36"
+ring = "0.13.5"
 failure = "0.1.5"
 rpassword = "4.0.1"
 structopt = "0.3.2"
--- a/README.md
+++ b/README.md
@@ -1,8 +1,8 @@
-# fido2luks
+# fido2luks [![Crates.io Version](https://img.shields.io/crates/v/fido2luks.svg)](https://crates.io/crates/fido2luks)

-This will allow you to unlock your luks encrypted disk with an fido2 compatable key
+This will allow you to unlock your luks encrypted disk with an fido2 compatible key

-Note: This has only been tested under Fedora 30 using a Solo Key
+Note: This has only been tested under Fedora 31 using a Solo Key, Trezor Model T

 ## Setup

@@ -17,18 +17,22 @@ dnf install cargo cryptsetup-devel -y
 ```
 git clone https://github.com/shimunn/fido2luks.git && cd fido2luks

-#Alternativly cargo build --release && sudo cp target/release/fido2luks /usr/bin/
-CARGO_INSTALL_ROOT=/usr sudo -E cargo install -f --path .
+# Alternativly cargo build --release && sudo cp target/release/fido2luks /usr/bin/
+sudo -E cargo install -f --path . --root /usr

-echo FIDO2LUKS_CREDENTIAL_ID=$(fido2luks credential) >> fido2luks.conf
+# Copy template
+cp dracut/96luks-2fa/fido2luks.conf /etc/
+# Name is optional but useful if your authenticator has a display
+echo FIDO2LUKS_CREDENTIAL_ID=$(fido2luks credential [NAME]) >> /etc/fido2luks.conf

+# Load config into env
 set -a
-. fido2luks.conf
+. /etc/fido2luks.conf

-#Repeat for each luks volume
+# Repeat for each luks volume
 sudo -E fido2luks -i add-key /dev/disk/by-uuid/<DISK_UUID>

-#Test(only works if the luks container isn't active)
+# Test(only works if the luks container isn't active)
 sudo -E fido2luks -i open /dev/disk/by-uuid/<DISK_UUID> luks-<DISK_UUID>

 ```
@@ -43,21 +47,59 @@ sudo make install

 ### Grub

-Add `rd.luks.2fa=<CREDENTIAL_ID>:<DISK_UUID>` to `GRUB_CMDLINE_LINUX`
+Add `rd.luks.2fa=<CREDENTIAL_ID>:<DISK_UUID>` to `GRUB_CMDLINE_LINUX` in /etc/default/grub

-Note: This is only required for your root disk, systemd will try to unlock all other luks partions using the same key if you added it using `fido2luks addkey`
+Note: This is only required for your root disk, systemd will try to unlock all other LUKS partions using the same key if you added it using `fido2luks add-key`

 ```
 grub2-mkconfig > /boot/grub2/grub.cfg
 ```

+I'd also recommend to copy the executable onto /boot so that it is accessible in case you have to access your disk from a rescue system
+
+```
+mkdir /boot/fido2luks/
+cp /usr/bin/fido2luks /boot/fido2luks/
+cp /etc/fido2luks.conf /boot/fido2luks/
+```
+
 ## Test

-Just reboot and see if it works, if thats the case you should remove your old less secure password from your luks header:
+Just reboot and see if it works, if that's the case you should remove your old less secure password from your LUKS header:

 ```
-#Recommend in case you lose your authenticator, store this backupfile somewhere safe
+# Recommend in case you lose your authenticator, store this backupfile somewhere safe
 cryptsetup luksHeaderBackup /dev/disk/by-uuid/<DISK_UUID> --header-backup-file luks_backup_<DISK_UUID>
-#There is no turning back if you mess this up, make sure you made a backup
+# There is no turning back if you mess this up, make sure you made a backup
 fido2luks -i add-key --exclusive /dev/disk/by-uuid/<DISK_UUID>
 ```
+
+## Addtional settings
+
+### Password less
+
+Remove your previous secret as described in the next section, in case you've already added one.
+
+Open `/etc/fido2luks.conf` and replace `FIDO2LUKS_SALT=Ask` with `FIDO2LUKS_SALT=string:<YOUR_RANDOM_STRING>`
+but be warned that this password will be included to into your initramfs.
+
+Import the new config into env:
+
+```
+set -a
+. /etc/fido2luks.conf
+```
+
+Then add the new secret to each device and update dracut afterwards `dracut -f`
+
+## Removal
+
+Remove `rd.luks.2fa` from `GRUB_CMDLINE_LINUX` in /etc/default/grub
+
+```
+set -a
+. fido2luks.conf
+sudo -E fido2luks -i replace-key /dev/disk/by-uuid/<DISK_UUID>
+
+sudo rm -rf /usr/lib/dracut/modules.d/96luks-2fa /etc/dracut.conf.d/luks-2fa.conf /etc/fido2luks.conf
+```
--- a/dracut/96luks-2fa/fido2luks.conf
+++ b/dracut/96luks-2fa/fido2luks.conf
@@ -0,0 +1,3 @@
+FIDO2LUKS_SALT=Ask
+FIDO2LUKS_PASSWORD_HELPER=/usr/bin/systemd-ask-password Please enter second factor for LUKS disk encryption
+
--- a/dracut/96luks-2fa/luks-2fa-generator.sh
+++ b/dracut/96luks-2fa/luks-2fa-generator.sh
@@ -9,7 +9,7 @@ MOUNT=$(command -v mount)
 UMOUNT=$(command -v umount)

 TIMEOUT=120
-CON_MSG="Please connect your authenicator"
+CON_MSG="Please connect your authenticator"

 generate_service () {
        local credential_id=$1 target_uuid=$2 timeout=$3 sd_dir=${4:-$NORMAL_DIR}
@@ -19,6 +19,10 @@ generate_service () {

        local crypto_target_service="systemd-cryptsetup@luks\x2d${sd_target_uuid}.service"
        local sd_service="${sd_dir}/luks-2fa@luks\x2d${sd_target_uuid}.service"
+        local fido2luks_args="--bin"
+        if [ ! -z "$timeout" ]; then
+          fido2luks_args="$fido2luks_args --await-dev ${timeout}"
+        fi
        {
                printf -- "[Unit]"
                printf -- "\nDescription=%s" "2fa for luks"
@@ -27,19 +31,15 @@ generate_service () {
                printf -- "\nBefore=%s umount.target luks-2fa.target" "$crypto_target_service"
                printf -- "\nConflicts=umount.target"
                printf -- "\nDefaultDependencies=no"
-                printf -- "\nJobTimeoutSec=%s" "$timeout"
-
+                [ ! -z "$timeout" ] && printf -- "\nJobTimeoutSec=%s" "$timeout"
                printf -- "\n\n[Service]"
                printf -- "\nType=oneshot"
                printf -- "\nRemainAfterExit=yes"
-                printf -- "\nEnvironment=FIDO2LUKS_CREDENTIAL_ID='%s'" "$credential_id"
-                printf -- "\nEnvironment=FIDO2LUKS_SALT='%s'" "Ask"
-                printf -- "\nEnvironment=FIDO2LUKS_PASSWORD_HELPER='%s'" "/usr/bin/systemd-ask-password Disk 2fa password"
+                printf -- "\nEnvironmentFile=%s" "/etc/fido2luks.conf"
+                [ ! -z "$credential_id" ] && printf -- "\nEnvironment=FIDO2LUKS_CREDENTIAL_ID='%s'" "$credential_id"
                printf -- "\nKeyringMode=%s" "shared"
 		            printf -- "\nExecStartPre=-/usr/bin/plymouth display-message --text \"${CON_MSG}\""
-		printf -- "\nExecStartPre=-/bin/bash -c \"while ! ${FIDO2LUKS} connected; do /usr/bin/sleep 1; done\""
-		printf -- "\nExecStartPre=-/usr/bin/plymouth hide-message --text \"${CON_MSG}\""
-                printf -- "\nExecStart=/bin/bash -c \"${FIDO2LUKS} print-secret --bin | ${CRYPTSETUP} attach 'luks-%s' '/dev/disk/by-uuid/%s' '/dev/stdin'\"" "$target_uuid" "$target_uuid"
+                printf -- "\nExecStart=/bin/bash -c \"${FIDO2LUKS} print-secret $fido2luks_args | ${CRYPTSETUP} attach 'luks-%s' '/dev/disk/by-uuid/%s' '/dev/stdin'\"" "$target_uuid" "$target_uuid"
                printf -- "\nExecStop=${CRYPTSETUP} detach 'luks-%s'" "$target_uuid"
        } > "$sd_service"

--- a/dracut/96luks-2fa/module-setup.sh
+++ b/dracut/96luks-2fa/module-setup.sh
@@ -18,6 +18,7 @@ depends () {
 install () {
        inst "$moddir/luks-2fa-generator.sh" "/etc/systemd/system-generators/luks-2fa-generator.sh"
        inst_simple "/usr/bin/fido2luks" "/usr/bin/fido2luks"
+        inst_simple "/etc/fido2luks.conf" "/etc/fido2luks.conf"
        inst "$systemdutildir/systemd-cryptsetup"
        mkdir -p "$initdir/luks-2fa"

--- a/dracut/Makefile
+++ b/dracut/Makefile
@@ -15,6 +15,7 @@ help:
 install:
 	cp ${MODULE_CONF_D}/${MODULE_CONF} ${DRACUT_CONF_D}/
 	cp -r ${MODULE_DIR} ${DRACUT_MODULES_D}/
+	cp ${MODULE_DIR}/fido2luks.conf /etc/fido2luks.conf
 	dracut -fv
 clean:
 	rm ${DRACUT_CONF_D}/${MODULE_CONF}
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -8,9 +8,15 @@ use cryptsetup_rs::{CryptDevice, Luks1CryptDevice};
 use libcryptsetup_sys::crypt_keyslot_info;
 use structopt::StructOpt;

+use failure::_core::fmt::{Error, Formatter};
+use failure::_core::str::FromStr;
+use failure::_core::time::Duration;
 use std::io::Write;
-use std::process::exit;

+use std::process::exit;
+use std::thread;
+
+use std::time::SystemTime;
 pub fn add_key_to_luks(
    device: PathBuf,
    secret: &[u8; 32],
@@ -70,8 +76,21 @@ pub fn add_password_to_luks(
    Ok(slot)
 }

-pub fn authenticator_connected() -> Fido2LuksResult<bool> {
-    Ok(!device::get_devices()?.is_empty())
+#[derive(Debug, Eq, PartialEq, Clone)]
+pub struct HexEncoded(Vec<u8>);
+
+impl std::fmt::Display for HexEncoded {
+    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error> {
+        f.write_str(&hex::encode(&self.0))
+    }
+}
+
+impl FromStr for HexEncoded {
+    type Err = hex::FromHexError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(HexEncoded(hex::decode(s)?))
+    }
 }

 #[derive(Debug, StructOpt)]
@@ -87,17 +106,36 @@ pub struct Args {
 pub struct SecretGeneration {
    /// FIDO credential id, generate using fido2luks credential
    #[structopt(name = "credential-id", env = "FIDO2LUKS_CREDENTIAL_ID")]
-    pub credential_id: String,
-    /// Salt for secret generation, defaults to Password
-    #[structopt(name = "salt", env = "FIDO2LUKS_SALT", default_value = "Ask")]
+    pub credential_id: HexEncoded,
+    /// Salt for secret generation, defaults to 'ask'
+    ///
+    /// Options:{n}
+    ///  - ask              : Prompt user using password helper{n}
+    ///  - file:<PATH>      : Will read <FILE>{n}
+    ///  - string:<STRING>  : Will use <STRING>, which will be handled like a password provided to the 'ask' option{n}
+    #[structopt(
+        name = "salt",
+        long = "salt",
+        env = "FIDO2LUKS_SALT",
+        default_value = "ask"
+    )]
    pub salt: InputSalt,
    /// Script used to obtain passwords, overridden by --interactive flag
    #[structopt(
        name = "password-helper",
        env = "FIDO2LUKS_PASSWORD_HELPER",
-        default_value = "/usr/bin/systemd-ask-password 'Please enter second factor for LUKS disk encryption!'"
+        default_value = "/usr/bin/env systemd-ask-password 'Please enter second factor for LUKS disk encryption!'"
    )]
    pub password_helper: PasswordHelper,
+
+    /// Await for an authenticator to be connected, timeout after n seconds
+    #[structopt(
+        long = "await-dev",
+        name = "await-dev",
+        env = "FIDO2LUKS_DEVICE_AWAIT",
+        default_value = "15"
+    )]
+    pub await_authenticator: u64,
 }

 impl SecretGeneration {
@@ -111,8 +149,23 @@ impl SecretGeneration {

    pub fn obtain_secret(&self) -> Fido2LuksResult<[u8; 32]> {
        let salt = self.salt.obtain(&self.password_helper)?;
+        let timeout = Duration::from_secs(self.await_authenticator);
+        let start = SystemTime::now();
+
+        while let Ok(el) = start.elapsed() {
+            if el > timeout {
+                Err(error::Fido2LuksError::NoAuthenticatorError)?;
+            }
+            if get_devices()
+                .map(|devices| !devices.is_empty())
+                .unwrap_or(false)
+            {
+                break;
+            }
+            thread::sleep(Duration::from_millis(500));
+        }
        Ok(assemble_secret(
-            &perform_challenge(&self.credential_id, &salt)?,
+            &perform_challenge(&self.credential_id.0, &salt)?,
            &salt,
        ))
    }
@@ -136,13 +189,12 @@ pub enum Command {
        /// Will wipe all other keys
        #[structopt(short = "e", long = "exclusive")]
        exclusive: bool,
-        /// Use a keyfile instead of a password
+        /// Use a keyfile instead of typing a previous password
        #[structopt(short = "d", long = "keyfile")]
        keyfile: Option<PathBuf>,
        #[structopt(flatten)]
        secret_gen: SecretGeneration,
    },
-
    /// Replace a previously added key with a password
    #[structopt(name = "replace-key")]
    ReplaceKey {
@@ -151,7 +203,7 @@ pub enum Command {
        /// Add the password and keep the key
        #[structopt(short = "a", long = "add-password")]
        add_password: bool,
-        /// Use a keyfile instead of a password
+        /// Use a keyfile instead of typing a previous password
        #[structopt(short = "d", long = "keyfile")]
        keyfile: Option<PathBuf>,
        #[structopt(flatten)]
@@ -164,12 +216,18 @@ pub enum Command {
        device: PathBuf,
        #[structopt(env = "FIDO2LUKS_MAPPER_NAME")]
        name: String,
+        #[structopt(short = "r", long = "max-retries", default_value = "0")]
+        retries: i32,
        #[structopt(flatten)]
        secret_gen: SecretGeneration,
    },
    /// Generate a new FIDO credential
    #[structopt(name = "credential")]
-    Credential,
+    Credential {
+        /// Name to be displayed on the authenticator if it has a display
+        #[structopt(env = "FIDO2LUKS_CREDENTIAL_NAME")]
+        name: Option<String>,
+    },
    /// Check if an authenticator is connected
    #[structopt(name = "connected")]
    Connected,
@@ -183,8 +241,8 @@ pub fn run_cli() -> Fido2LuksResult<()> {
    let mut stdout = io::stdout();
    let args = parse_cmdline();
    match &args.command {
-        Command::Credential => {
-            let cred = make_credential_id()?;
+        Command::Credential { name } => {
+            let cred = make_credential_id(name.as_ref().map(|n| n.as_ref()))?;
            println!("{}", hex::encode(&cred.id));
            Ok(())
        }
@@ -255,10 +313,24 @@ pub fn run_cli() -> Fido2LuksResult<()> {
        Command::Open {
            device,
            name,
+            retries,
            ref secret_gen,
        } => {
+            let mut retries = *retries;
+            loop {
                let secret = secret_gen.patch(&args).obtain_secret()?;
-            open_container(&device, &name, &secret)
+                match open_container(&device, &name, &secret) {
+                    Err(e) => match e {
+                        Fido2LuksError::WrongSecret if retries > 0 => {
+                            retries -= 1;
+                            eprintln!("{}", e);
+                            continue;
+                        }
+                        e => Err(e)?,
+                    },
+                    res => break res,
+                }
+            }
        }
        Command::Connected => match get_devices() {
            Ok(ref devs) if !devs.is_empty() => {
--- a/src/config.rs
+++ b/src/config.rs
@@ -1,7 +1,6 @@
 use crate::error::*;
 use crate::*;
-use crypto::digest::Digest;
-use crypto::sha2::Sha256;
+use ring::digest;

 use std::fmt;
 use std::fs::File;
@@ -10,11 +9,11 @@ use std::path::PathBuf;
 use std::process::Command;
 use std::str::FromStr;

-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub enum InputSalt {
    AskPassword,
+    String(String),
    File { path: PathBuf },
-    Both { path: PathBuf },
 }

 impl Default for InputSalt {
@@ -25,10 +24,14 @@ impl Default for InputSalt {

 impl From<&str> for InputSalt {
    fn from(s: &str) -> Self {
-        if PathBuf::from(s).exists() && s != "Ask" {
-            InputSalt::File { path: s.into() }
-        } else {
-            InputSalt::AskPassword
+        let mut parts = s.split(":").into_iter();
+        match parts.next() {
+            Some("ask") | Some("Ask") => InputSalt::AskPassword,
+            Some("file") => InputSalt::File {
+                path: parts.collect::<Vec<_>>().join(":").into(),
+            },
+            Some("string") => InputSalt::String(parts.collect::<Vec<_>>().join(":")),
+            _ => Self::default(),
        }
    }
 }
@@ -45,15 +48,15 @@ impl fmt::Display for InputSalt {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
        f.write_str(&match self {
            InputSalt::AskPassword => "ask".to_string(),
-            InputSalt::File { path } => path.display().to_string(),
-            InputSalt::Both { path } => ["ask", path.display().to_string().as_str()].join(" + "),
+            InputSalt::String(s) => ["string", s].join(":"),
+            InputSalt::File { path } => ["file", path.display().to_string().as_str()].join(":"),
        })
    }
 }

 impl InputSalt {
    pub fn obtain(&self, password_helper: &PasswordHelper) -> Fido2LuksResult<[u8; 32]> {
-        let mut digest = Sha256::new();
+        let mut digest = digest::Context::new(&digest::SHA256);
        match self {
            InputSalt::File { path } => {
                let mut do_io = || {
@@ -61,7 +64,7 @@ impl InputSalt {
                    let mut buf = [0u8; 512];
                    loop {
                        let red = reader.read(&mut buf)?;
-                        digest.input(&buf[0..red]);
+                        digest.update(&buf[0..red]);
                        if red == 0 {
                            break;
                        }
@@ -71,15 +74,12 @@ impl InputSalt {
                do_io().map_err(|cause| Fido2LuksError::KeyfileError { cause })?;
            }
            InputSalt::AskPassword => {
-                digest.input(password_helper.obtain()?.as_bytes());
-            }
-            InputSalt::Both { path } => {
-                digest.input(&InputSalt::AskPassword.obtain(password_helper)?);
-                digest.input(&InputSalt::File { path: path.clone() }.obtain(password_helper)?)
+                digest.update(password_helper.obtain()?.as_bytes());
            }
+            InputSalt::String(s) => digest.update(s.as_bytes()),
        }
        let mut salt = [0u8; 32];
-        digest.result(&mut salt);
+        salt.as_mut().copy_from_slice(digest.finish().as_ref());
        Ok(salt)
    }
 }
@@ -94,7 +94,7 @@ pub enum PasswordHelper {
 impl Default for PasswordHelper {
    fn default() -> Self {
        PasswordHelper::Script(
-            "/usr/bin/systemd-ask-password 'Please enter second factor for LUKS disk encryption!'"
+            "/usr/bin/env systemd-ask-password 'Please enter second factor for LUKS disk encryption!'"
                .into(),
        )
    }
@@ -148,3 +148,38 @@ impl PasswordHelper {
        }
    }
 }
+
+#[cfg(test)]
+mod test {
+
+    use super::*;
+
+    #[test]
+    fn input_salt_from_str() {
+        assert_eq!(
+            "file:/tmp/abc".parse::<InputSalt>().unwrap(),
+            InputSalt::File {
+                path: "/tmp/abc".into()
+            }
+        );
+        assert_eq!(
+            "string:abc".parse::<InputSalt>().unwrap(),
+            InputSalt::String("abc".into())
+        );
+        assert_eq!("ask".parse::<InputSalt>().unwrap(), InputSalt::AskPassword);
+        assert_eq!("lol".parse::<InputSalt>().unwrap(), InputSalt::default());
+    }
+
+    #[test]
+    fn input_salt_obtain() {
+        assert_eq!(
+            InputSalt::String("abc".into())
+                .obtain(&PasswordHelper::Stdin)
+                .unwrap(),
+            [
+                186, 120, 22, 191, 143, 1, 207, 234, 65, 65, 64, 222, 93, 174, 34, 35, 176, 3, 97,
+                163, 150, 23, 122, 156, 180, 16, 255, 97, 242, 0, 21, 173
+            ]
+        )
+    }
+}
--- a/src/device.rs
+++ b/src/device.rs
@@ -1,16 +1,56 @@
 use crate::error::*;
+use crate::util::sha256;

-use ctap;
-use ctap::extensions::hmac::{FidoHmacCredential, HmacExtension};
-use ctap::{FidoDevice, FidoError, FidoErrorKind};
+use ctap::{
+    self,
+    extensions::hmac::{FidoHmacCredential, HmacExtension},
+    AuthenticatorOptions, FidoDevice, FidoError, FidoErrorKind, PublicKeyCredentialRpEntity,
+    PublicKeyCredentialUserEntity,
+};

-pub fn make_credential_id() -> Fido2LuksResult<FidoHmacCredential> {
+const RP_ID: &'static str = "fido2luks";
+
+fn authenticator_options() -> Option<AuthenticatorOptions> {
+    Some(AuthenticatorOptions {
+        uv: false, //TODO: should get this from config
+        rk: true,
+    })
+}
+
+fn authenticator_rp() -> PublicKeyCredentialRpEntity<'static> {
+    PublicKeyCredentialRpEntity {
+        id: RP_ID,
+        name: None,
+        icon: None,
+    }
+}
+
+fn authenticator_user(name: Option<&str>) -> PublicKeyCredentialUserEntity {
+    PublicKeyCredentialUserEntity {
+        id: &[0u8],
+        name: name.unwrap_or(""),
+        icon: None,
+        display_name: name,
+    }
+}
+
+pub fn make_credential_id(name: Option<&str>) -> Fido2LuksResult<FidoHmacCredential> {
    let mut errs = Vec::new();
    match get_devices()? {
        ref devs if devs.is_empty() => Err(Fido2LuksError::NoAuthenticatorError)?,
        devs => {
            for mut dev in devs.into_iter() {
-                match dev.make_hmac_credential() {
+                match dev
+                    .make_hmac_credential_full(
+                        authenticator_rp(),
+                        authenticator_user(name),
+                        &[0u8; 32],
+                        &[],
+                        authenticator_options(),
+                    )
+                    .map(|cred| cred.into())
+                {
+                    //TODO: make credentials device specific
                    Ok(cred) => {
                        return Ok(cred);
                    }
@@ -24,19 +64,19 @@ pub fn make_credential_id() -> Fido2LuksResult<FidoHmacCredential> {
    Err(errs.pop().ok_or(Fido2LuksError::NoAuthenticatorError)?)?
 }

-pub fn perform_challenge(credential_id: &str, salt: &[u8; 32]) -> Fido2LuksResult<[u8; 32]> {
+pub fn perform_challenge(credential_id: &[u8], salt: &[u8; 32]) -> Fido2LuksResult<[u8; 32]> {
    let cred = FidoHmacCredential {
-        id: hex::decode(credential_id).unwrap(),
-        rp_id: "hmac".to_string(),
+        id: credential_id.to_vec(),
+        rp_id: RP_ID.to_string(),
    };
    let mut errs = Vec::new();
    match get_devices()? {
        ref devs if devs.is_empty() => Err(Fido2LuksError::NoAuthenticatorError)?,
        devs => {
            for mut dev in devs.into_iter() {
-                match dev.hmac_challange(&cred, &salt[..]) {
+                match dev.get_hmac_assertion(&cred, &sha256(&[&salt[..]]), None, None) {
                    Ok(secret) => {
-                        return Ok(secret);
+                        return Ok(secret.0);
                    }
                    Err(e) => {
                        errs.push(e);
--- a/src/error.rs
+++ b/src/error.rs
@@ -11,11 +11,11 @@ pub enum Fido2LuksError {
    KeyfileError { cause: io::Error },
    #[fail(display = "authenticator error: {}", cause)]
    AuthenticatorError { cause: ctap::FidoError },
-    #[fail(display = "no authenticator found, please ensure you device is plugged in")]
+    #[fail(display = "no authenticator found, please ensure your device is plugged in")]
    NoAuthenticatorError,
    #[fail(display = "luks err")]
    LuksError { cause: cryptsetup_rs::device::Error },
-    #[fail(display = "no authenticator found, please ensure you device is plugged in")]
+    #[fail(display = "no authenticator found, please ensure your device is plugged in")]
    IoError { cause: io::Error },
    #[fail(display = "supplied secret isn't valid for this device")]
    WrongSecret,
@@ -23,6 +23,19 @@ pub enum Fido2LuksError {
    StringEncodingError { cause: FromUtf8Error },
 }

+impl Fido2LuksError {
+    pub fn exit_code(&self) -> i32 {
+        use Fido2LuksError::*;
+        match self {
+            AskPassError { .. } | KeyfileError { .. } => 2,
+            AuthenticatorError { .. } => 3,
+            NoAuthenticatorError => 4,
+            WrongSecret => 5,
+            _ => 1,
+        }
+    }
+}
+
 #[derive(Debug, Fail)]
 pub enum AskPassError {
    #[fail(display = "unable to retrieve password: {}", _0)]
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,16 +1,16 @@
 #[macro_use]
 extern crate failure;
+extern crate ctap_hmac as ctap;
 use crate::cli::*;
 use crate::config::*;
 use crate::device::*;
 use crate::error::*;
-use crypto::digest::Digest;
-use crypto::sha2::Sha256;
 use cryptsetup_rs as luks;
 use cryptsetup_rs::Luks1CryptDevice;

-use std::io::{self};
+use std::io;
 use std::path::PathBuf;
+use std::process::exit;

 mod cli;
 mod config;
@@ -25,14 +25,35 @@ fn open_container(device: &PathBuf, name: &str, secret: &[u8; 32]) -> Fido2LuksR
 }

 fn assemble_secret(hmac_result: &[u8], salt: &[u8]) -> [u8; 32] {
-    let mut digest = Sha256::new();
-    digest.input(salt);
-    digest.input(hmac_result);
-    let mut secret = [0u8; 32];
-    digest.result(&mut secret);
-    secret
+    util::sha256(&[salt, hmac_result])
 }

 fn main() -> Fido2LuksResult<()> {
-    run_cli()
+    match run_cli() {
+        Err(e) => {
+            #[cfg(debug_assertions)]
+            eprintln!("{:?}", e);
+            #[cfg(not(debug_assertions))]
+            eprintln!("{}", e);
+            exit(e.exit_code())
+        }
+        _ => exit(0),
+    }
+}
+
+#[cfg(test)]
+mod test {
+
+    use super::*;
+
+    #[test]
+    fn test_assemble_secret() {
+        assert_eq!(
+            assemble_secret(b"abc", b"def"),
+            [
+                46, 82, 82, 140, 142, 159, 249, 196, 227, 160, 142, 72, 151, 77, 59, 62, 180, 36,
+                33, 47, 241, 94, 17, 232, 133, 103, 247, 32, 152, 253, 43, 19
+            ]
+        )
+    }
 }
--- a/src/util.rs
+++ b/src/util.rs
@@ -1,8 +1,19 @@
 use crate::error::*;
+use ring::digest;
 use std::fs::File;
 use std::io::Read;
 use std::path::PathBuf;

+pub fn sha256<'a>(messages: &[&[u8]]) -> [u8; 32] {
+    let mut digest = digest::Context::new(&digest::SHA256);
+    for m in messages.iter() {
+        digest.update(m);
+    }
+    let mut secret = [0u8; 32];
+    secret.as_mut().copy_from_slice(digest.finish().as_ref());
+    secret
+}
+
 pub fn read_password(q: &str, verify: bool) -> Fido2LuksResult<String> {
    match rpassword::read_password_from_tty(Some(&[q, ": "].join("")))? {
        ref pass
Author	SHA1	Message	Date
shimun	03e34ec790	0.2.3 Some checks failed continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is failing Details	2020-01-20 22:43:06 +01:00
shimun	a437106fcb	use await-dev per default All checks were successful continuous-integration/drone/push Build is passing Details	2020-01-16 19:41:59 +01:00
shimun	7ed948d53b	update & tidy readme All checks were successful continuous-integration/drone/push Build is passing Details	2020-01-15 16:46:15 +01:00
shimun	c4e08413c0	Added --await-dev flag All checks were successful continuous-integration/drone/push Build is passing Details	2020-01-13 23:23:45 +01:00
shimunn	7429706920	Merge pull request #7 from mmahut/patch-1 All checks were successful continuous-integration/drone/push Build is passing Details error.rs: typo	2020-01-13 21:54:09 +01:00
Marek Mahut	a5fd5fa9f6	error.rs: typo	2020-01-13 17:44:51 +01:00
shimun	659fafdfb4	update to 0.2.2 Some checks failed continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is failing Details	2020-01-10 21:44:33 +01:00
shimun	7f2668eded	allow for named credentials	2020-01-10 21:32:39 +01:00
shimunn	ae714cdef3	Merge pull request #6 from mmahut/fixid All checks were successful continuous-integration/drone/push Build is passing Details match rp_id to fido2luks	2020-01-10 19:47:31 +01:00
shimunn	ae802e5e71	Merge pull request #5 from mmahut/env use password helper in modified environments	2020-01-10 19:47:01 +01:00
Marek Mahut	a5f0444d24	match rp_id to fido2luks	2020-01-10 17:13:56 +01:00
Marek Mahut	a307d87d88	use password helper in modified environments	2020-01-10 16:52:22 +01:00
shimun	721dded6d2	WIP: 0.2.2 All checks were successful continuous-integration/drone/push Build is passing Details Warning: This release cointains changes to way credentials are generated, which may cause your authenticator to reject the old credential.	2020-01-09 22:22:54 +01:00
Shimun	e7049a281a	Use fido2luks as rp_id instead if default hmac, consider making All checks were successful continuous-integration/drone/push Build is passing Details credenials device specific	2020-01-02 15:35:32 +01:00
shimun	5d1c7beb4d	added flag to retry open command All checks were successful continuous-integration/drone/push Build is passing Details	2019-10-12 22:46:54 +02:00
shimun	2bac911b32	assigned exit codes to error cases	2019-10-12 22:46:20 +02:00
shimun	9a8ea993b5	fmt All checks were successful continuous-integration/drone/push Build is passing Details	2019-10-12 13:40:24 +02:00
shimunn	7eb9dcc928	Merge pull request #2 from jannic/add-test-cases Some checks failed continuous-integration/drone/push Build is failing Details Add test case for hash calculations	2019-10-12 13:24:33 +02:00
shimunn	509e300a8f	Merge pull request #1 from jannic/port-to-ring Use ring for sha256 calculation	2019-10-12 13:24:18 +02:00
Jan Niehusmann	42945956a6	Add test case for hash calculations While replacing the implementation of sha256, I noticed that there is no test case actually calling the hash calculations. Added two such test cases. Please note that I didn't verify that the result is correct, but just took the value the existing implementation returned. So those tests will only catch future regressions.	2019-10-11 22:15:21 +00:00
Jan Niehusmann	3cf5ccf2a0	Use ring for sha256 calculation According to https://rustsec.org/advisories/RUSTSEC-2016-0005.html, rust-crypto is unmaintained. Crates depending on rust-crypto should be ported to other crates. This port replaces rust-crypto with the sha2 implementation of ring, as fido2luks already depends on it via ctap_hmac. Note that it uses an old version of ring, so I used the same version, here.	2019-10-11 22:06:00 +00:00
shimun	79e9a37806	use cratesio deps only All checks were successful continuous-integration/drone/push Build is passing Details	2019-10-10 13:41:02 +02:00
shimun	d16118e695	Readme All checks were successful continuous-integration/drone/push Build is passing Details	2019-10-08 15:13:15 +02:00
shimunn	6e53449ff6	move config into etc All checks were successful continuous-integration/drone/push Build is passing Details	2019-10-08 14:50:31 +02:00
shimunn	fbcfdea96b	make salt cli option	2019-10-06 22:16:12 +02:00
shimunn	99e408cc8d	replaced InputSalt::Both with String option All checks were successful continuous-integration/drone/push Build is passing Details	2019-10-06 22:15:29 +02:00
Shimun	8fc9e0dcce	extended readme All checks were successful continuous-integration/drone/push Build is passing Details	2019-09-27 01:03:33 +02:00