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17 Commits
isalt ... 0.2.2

Author SHA1 Message Date
659fafdfb4 update to 0.2.2
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2020-01-10 21:44:33 +01:00
7f2668eded allow for named credentials 2020-01-10 21:32:39 +01:00
shimunn
ae714cdef3 Merge pull request #6 from mmahut/fixid
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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
721dded6d2 WIP: 0.2.2
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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
e7049a281a Use fido2luks as rp_id instead if default hmac, consider making
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credenials device specific
2020-01-02 15:35:32 +01:00
5d1c7beb4d added flag to retry open command
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2019-10-12 22:46:54 +02:00
2bac911b32 assigned exit codes to error cases 2019-10-12 22:46:20 +02:00
9a8ea993b5 fmt
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2019-10-12 13:40:24 +02:00
shimunn
7eb9dcc928 Merge pull request #2 from jannic/add-test-cases
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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
79e9a37806 use cratesio deps only
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2019-10-10 13:41:02 +02:00
d16118e695 Readme
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2019-10-08 15:13:15 +02:00
9 changed files with 252 additions and 87 deletions

111
Cargo.lock generated
View File

@@ -24,11 +24,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "backtrace"
version = "0.3.37"
version = "0.3.38"
source = "registry+https://github.com/rust-lang/crates.io-index"
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@@ -44,16 +44,16 @@ dependencies = [
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[[package]]
@@ -77,7 +77,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "cfg-if"
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source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
@@ -87,7 +87,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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@@ -156,7 +166,7 @@ name = "failure"
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@@ -173,15 +183,15 @@ dependencies = [
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@@ -208,6 +218,11 @@ name = "hex"
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[[package]]
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[[package]]
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@@ -220,8 +235,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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@@ -232,7 +247,15 @@ name = "log"
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"checksum proc-macro-error 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "aeccfe4d5d8ea175d5f0e4a2ad0637e0f4121d63bd99d356fb1f39ab2e7c6097"
"checksum proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)" = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
"checksum proc-macro2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "e98a83a9f9b331f54b924e68a66acb1bb35cb01fb0a23645139967abefb697e8"
"checksum proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "90cf5f418035b98e655e9cdb225047638296b862b42411c4e45bb88d700f7fc0"
"checksum quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)" = "6ce23b6b870e8f94f81fb0a363d65d86675884b34a09043c81e5562f11c1f8e1"
"checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
"checksum rand 0.3.23 (registry+https://github.com/rust-lang/crates.io-index)" = "64ac302d8f83c0c1974bf758f6b041c6c8ada916fbb44a609158ca8b064cc76c"
@@ -673,7 +698,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
"checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
"checksum untrusted 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "55cd1f4b4e96b46aeb8d4855db4a7a9bd96eeeb5c6a1ab54593328761642ce2f"
"checksum uuid 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)" = "e1436e58182935dcd9ce0add9ea0b558e8a87befe01c1a301e6020aeb0876363"
"checksum uuid 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)" = "90dbc611eb48397705a6b0f6e917da23ae517e4d127123d2cf7674206627d32a"
"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"

View File

@@ -1,17 +1,27 @@
[package]
name = "fido2luks"
version = "0.2.0"
version = "0.2.2"
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 = "0.1.0"
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"

View File

@@ -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 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
@@ -70,6 +70,23 @@ cryptsetup luksHeaderBackup /dev/disk/by-uuid/<DISK_UUID> --header-backup-file l
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, incase you already added one.
Open `/etc/fido2luks.conf` and replace `FIDO2LUKS_SALT=Ask` with `FIDO2LUKS_SALT=string:<YOUR_RANDOM_STRING>`
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

View File

@@ -70,10 +70,6 @@ pub fn add_password_to_luks(
Ok(slot)
}
pub fn authenticator_connected() -> Fido2LuksResult<bool> {
Ok(!device::get_devices()?.is_empty())
}
#[derive(Debug, StructOpt)]
pub struct Args {
/// Request passwords via Stdin instead of using the password helper
@@ -105,7 +101,7 @@ pub struct SecretGeneration {
#[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,
}
@@ -174,12 +170,18 @@ 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,
@@ -193,8 +195,8 @@ 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(())
}
@@ -265,10 +267,24 @@ 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() => {

View File

@@ -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;
@@ -57,7 +56,7 @@ impl fmt::Display for InputSalt {
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 = || {
@@ -65,7 +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;
}
@@ -75,12 +74,12 @@ impl InputSalt {
do_io().map_err(|cause| Fido2LuksError::KeyfileError { cause })?;
}
InputSalt::AskPassword => {
digest.input(password_helper.obtain()?.as_bytes());
digest.update(password_helper.obtain()?.as_bytes());
}
InputSalt::String(s) => digest.input(s.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)
}
}
@@ -95,7 +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(),
)
}
@@ -170,4 +169,17 @@ mod test {
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
]
)
}
}

View File

@@ -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);
}
@@ -27,16 +67,16 @@ pub fn make_credential_id() -> Fido2LuksResult<FidoHmacCredential> {
pub fn perform_challenge(credential_id: &str, salt: &[u8; 32]) -> Fido2LuksResult<[u8; 32]> {
let cred = FidoHmacCredential {
id: hex::decode(credential_id).unwrap(),
rp_id: "hmac".to_string(),
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);

View File

@@ -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)]

View File

@@ -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
]
)
}
}

View File

@@ -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