add nix flake

* obvious password promt

* prompt interaction with FIDO device

.drone.yml

@@ -3,32 +3,27 @@ name: default
 
 steps:
  - name: fmt
-   image: rust:1.37.0
+   image: rust:1.43.0
    commands:
-     -  rustup component add rustfmt
+     - rustup component add rustfmt
-     -  cargo fmt --all -- --check
+     - cargo fmt --all -- --check
  - name: test
-   image: rust:1.37.0
+   image: ubuntu:focal
+   environment:
+    DEBIAN_FRONTEND: noninteractive
    commands:
-    - apt update && apt install -y libcryptsetup-dev libkeyutils-dev
+    - apt update && apt install -y cargo libkeyutils-dev libclang-dev clang pkg-config libcryptsetup-dev 
-    - cargo test
+    - cargo test --locked
-
+ - name: publish
- - name: build
+   image: ubuntu:focal
-   image: rust:1.37.0
+   environment:
+    DEBIAN_FRONTEND: noninteractive
+    CARGO_REGISTRY_TOKEN:
+     from_secret: cargo_tkn
    commands:
-    - apt update && apt install -y libcryptsetup-dev libkeyutils-dev
+    - grep -E 'version ?= ?"${DRONE_TAG}"' -i Cargo.toml || (printf "incorrect crate/tag version" && exit 1)
-    - cargo install -f --path . --root .
+    - apt update && apt install -y cargo libkeyutils-dev libclang-dev clang pkg-config libcryptsetup-dev 
+    - cargo package --all-features
+    - cargo publish --all-features
    when:
     event: tag
- - name: publish
-   image: plugins/github-release
-   settings:
-     api_key:
-      from_secret: github_release
-     files:
-      - bin/fido2luks
-     checksum:
-      - md5
-      - sha256
-   when:
-    event: tag    

.gitignore

@@ -2,3 +2,9 @@
 **/*.rs.bk
 .idea/
 *.iml
+fido2luks.bash
+fido2luks.elv
+fido2luks.fish
+fido2luks.zsh
+result
+result-*

Cargo.lock

@@ -1,10 +1,25 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
 [[package]]
-name = "aho-corasick"
+name = "addr2line"
-version = "0.7.10"
+version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8716408b8bc624ed7f65d223ddb9ac2d044c0547b6fa4b0d554f3a9540496ada"
+checksum = "1b6a2d3371669ab3ca9797670853d61402b03d0b4b9ebf33d677dfa720203072"
+dependencies = [
+ "gimli",
+]
+
+[[package]]
+name = "adler"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee2a4ec343196209d6594e19543ae87a39f96d5534d7174822a3ad825dd6ed7e"
+
+[[package]]
+name = "aho-corasick"
+version = "0.7.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "043164d8ba5c4c3035fec9bbee8647c0261d788f3474306f93bb65901cae0e86"
 dependencies = [
  "memchr",
 ]
@@ -37,37 +52,29 @@ checksum = "1d49d90015b3c36167a20fe2810c5cd875ad504b39cff3d4eae7977e6b7c1cb2"
 
 [[package]]
 name = "autocfg"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"
+checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
 
 [[package]]
 name = "backtrace"
-version = "0.3.46"
+version = "0.3.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1e692897359247cc6bb902933361652380af0f1b7651ae5c5013407f30e109e"
+checksum = "46254cf2fdcdf1badb5934448c1bcbe046a56537b3987d96c51a7afc5d03f293"
 dependencies = [
- "backtrace-sys",
+ "addr2line",
  "cfg-if",
  "libc",
+ "miniz_oxide",
+ "object",
  "rustc-demangle",
 ]
 
-[[package]]
-name = "backtrace-sys"
-version = "0.1.36"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78848718ee1255a2485d1309ad9cdecfc2e7d0362dd11c6829364c6b35ae1bc7"
-dependencies = [
- "cc",
- "libc",
-]
-
 [[package]]
 name = "bindgen"
-version = "0.53.2"
+version = "0.54.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6bb26d6a69a335b8cb0e7c7e9775cd5666611dc50a37177c3f2cedcfc040e8c8"
+checksum = "66c0bb6167449588ff70803f4127f0684f9063097eca5016f37eb52b92c2cf36"
 dependencies = [
  "bitflags",
  "cexpr",
@@ -79,8 +86,8 @@ dependencies = [
  "lazycell",
  "log",
  "peeking_take_while",
- "proc-macro2 1.0.10",
+ "proc-macro2 1.0.20",
- "quote 1.0.3",
+ "quote 1.0.7",
  "regex",
  "rustc-hash",
  "shlex",
@@ -111,9 +118,9 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.0.52"
+version = "1.0.59"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3d87b23d6a92cd03af510a5ade527033f6aa6fa92161e2d5863a907d4c5e31d"
+checksum = "66120af515773fb005778dc07c261bd201ec8ce50bd6e7144c927753fe013381"
 
 [[package]]
 name = "cexpr"
@@ -143,9 +150,9 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "2.33.0"
+version = "2.33.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5067f5bb2d80ef5d68b4c87db81601f0b75bca627bc2ef76b141d7b846a3c6d9"
+checksum = "37e58ac78573c40708d45522f0d80fa2f01cc4f9b4e2bf749807255454312002"
 dependencies = [
  "ansi_term",
  "atty",
@@ -181,9 +188,9 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-channel"
-version = "0.4.2"
+version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cced8691919c02aac3cb0a1bc2e9b73d89e832bf9a06fc579d4e71b68a2da061"
+checksum = "b153fe7cbef478c567df0f972e02e6d736db11affe43dfc9c56a9374d1adfb87"
 dependencies = [
  "crossbeam-utils",
  "maybe-uninit",
@@ -206,7 +213,7 @@ version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "058ed274caafc1f60c4997b5fc07bf7dc7cca454af7c6e81edffe5f33f70dace"
 dependencies = [
- "autocfg 1.0.0",
+ "autocfg 1.0.1",
  "cfg-if",
  "crossbeam-utils",
  "lazy_static",
@@ -217,12 +224,13 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-queue"
-version = "0.2.1"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c695eeca1e7173472a32221542ae469b3e9aac3a4fc81f7696bcad82029493db"
+checksum = "774ba60a54c213d409d5353bda12d49cd68d14e45036a285234c8d6f91f92570"
 dependencies = [
  "cfg-if",
  "crossbeam-utils",
+ "maybe-uninit",
 ]
 
 [[package]]
@@ -231,7 +239,7 @@ version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3c7c73a2d1e9fc0886a08b93e98eb643461230d5f1925e4036204d5f2e261a8"
 dependencies = [
- "autocfg 1.0.0",
+ "autocfg 1.0.1",
  "cfg-if",
  "lazy_static",
 ]
@@ -284,10 +292,10 @@ checksum = "f0c960ae2da4de88a91b2d920c2a7233b400bc33cb28453a2987822d8392519b"
 dependencies = [
  "fnv",
  "ident_case",
- "proc-macro2 1.0.10",
+ "proc-macro2 1.0.20",
- "quote 1.0.3",
+ "quote 1.0.7",
  "strsim 0.9.3",
- "syn 1.0.18",
+ "syn 1.0.40",
 ]
 
 [[package]]
@@ -297,8 +305,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d9b5a2f4ac4969822c62224815d069952656cadc7084fdca9751e6d959189b72"
 dependencies = [
  "darling_core",
- "quote 1.0.3",
+ "quote 1.0.7",
- "syn 1.0.18",
+ "syn 1.0.40",
 ]
 
 [[package]]
@@ -309,9 +317,9 @@ checksum = "a2658621297f2cf68762a6f7dc0bb7e1ff2cfd6583daef8ee0fed6f7ec468ec0"
 dependencies = [
  "darling",
  "derive_builder_core",
- "proc-macro2 1.0.10",
+ "proc-macro2 1.0.20",
- "quote 1.0.3",
+ "quote 1.0.7",
- "syn 1.0.18",
+ "syn 1.0.40",
 ]
 
 [[package]]
@@ -321,16 +329,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2791ea3e372c8495c0bc2033991d76b512cd799d07491fbd6890124db9458bef"
 dependencies = [
  "darling",
- "proc-macro2 1.0.10",
+ "proc-macro2 1.0.20",
- "quote 1.0.3",
+ "quote 1.0.7",
- "syn 1.0.18",
+ "syn 1.0.40",
 ]
 
 [[package]]
 name = "either"
-version = "1.5.3"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb1f6b1ce1c140482ea30ddd3335fc0024ac7ee112895426e0a629a6c20adfe3"
+checksum = "cd56b59865bce947ac5958779cfa508f6c3b9497cc762b7e24a12d11ccde2c4f"
 
 [[package]]
 name = "env_logger"
@@ -347,9 +355,9 @@ dependencies = [
 
 [[package]]
 name = "failure"
-version = "0.1.7"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b8529c2421efa3066a5cbd8063d2244603824daccb6936b079010bb2aa89464b"
+checksum = "d32e9bd16cc02eae7db7ef620b392808b89f6a5e16bb3497d159c6b92a0f4f86"
 dependencies = [
  "backtrace",
  "failure_derive",
@@ -357,19 +365,19 @@ dependencies = [
 
 [[package]]
 name = "failure_derive"
-version = "0.1.7"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "030a733c8287d6213886dd487564ff5c8f6aae10278b3588ed177f9d18f8d231"
+checksum = "aa4da3c766cd7a0db8242e326e9e4e081edd567072893ed320008189715366a4"
 dependencies = [
- "proc-macro2 1.0.10",
+ "proc-macro2 1.0.20",
- "quote 1.0.3",
+ "quote 1.0.7",
- "syn 1.0.18",
+ "syn 1.0.40",
  "synstructure",
 ]
 
 [[package]]
 name = "fido2luks"
-version = "0.2.8"
+version = "0.2.16"
 dependencies = [
  "ctap_hmac",
  "failure",
@@ -385,9 +393,9 @@ dependencies = [
 
 [[package]]
 name = "fnv"
-version = "1.0.6"
+version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2fad85553e09a6f881f739c29f0b00b0f01357c743266d478b68951ce23285f3"
+checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
 
 [[package]]
 name = "fuchsia-cprng"
@@ -401,6 +409,12 @@ version = "0.3.55"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f5f3913fa0bfe7ee1fd8248b6b9f42a5af4b9d65ec2dd2c3c26132b950ecfc2"
 
+[[package]]
+name = "gimli"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aaf91faf136cb47367fa430cd46e37a788775e7fa104f8b4bcb3861dc389b724"
+
 [[package]]
 name = "glob"
 version = "0.3.0"
@@ -418,9 +432,9 @@ dependencies = [
 
 [[package]]
 name = "hermit-abi"
-version = "0.1.12"
+version = "0.1.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "61565ff7aaace3525556587bd2dc31d4a07071957be715e63ce7b1eccf51a8f4"
+checksum = "3deed196b6e7f9e44a2ae8d94225d80302d81208b1bb673fd21fe634645c85a9"
 dependencies = [
  "libc",
 ]
@@ -448,9 +462,9 @@ checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
 
 [[package]]
 name = "itoa"
-version = "0.4.5"
+version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b8b7a7c0c47db5545ed3fef7468ee7bb5b74691498139e4b3f6a20685dc6dd8e"
+checksum = "dc6f3ad7b9d11a0c00842ff8de1b60ee58661048eb8049ed33c73594f359d7e6"
 
 [[package]]
 name = "lazy_static"
@@ -460,21 +474,21 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "lazycell"
-version = "1.2.1"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b294d6fa9ee409a054354afc4352b0b9ef7ca222c69b8812cbea9e7d2bf3783f"
+checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
 
 [[package]]
 name = "libc"
-version = "0.2.69"
+version = "0.2.76"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99e85c08494b21a9054e7fe1374a732aeadaff3980b6990b94bfd3a70f690005"
+checksum = "755456fae044e6fa1ebbbd1b3e902ae19e73097ed4ed87bb79934a867c007bc3"
 
 [[package]]
 name = "libcryptsetup-rs"
-version = "0.4.1"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "38cd24132ee0239515bc895782f65ab3e382a0f78e7cee30417159e5c6f81b6b"
+checksum = "b9042dbf4b7e4309494949696496e230c9052af64559d3441627d639898c172c"
 dependencies = [
  "either",
  "libc",
@@ -487,9 +501,9 @@ dependencies = [
 
 [[package]]
 name = "libcryptsetup-rs-sys"
-version = "0.1.2"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0c605998e81e2a99c1f4c5d0be45ea1df6f1dc45dc64f5ca2847b0dbebf49ae7"
+checksum = "4b75a2b946509fb39fdb4b232c973166da14be373d09a43eb36b82f775d8244e"
 dependencies = [
  "bindgen",
  "cc",
@@ -509,9 +523,9 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.8"
+version = "0.4.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
+checksum = "4fabed175da42fed1fa0746b0ea71f412aa9d35e76e95e59b192c64b9dc2bf8b"
 dependencies = [
  "cfg-if",
 ]
@@ -530,18 +544,27 @@ checksum = "3728d817d99e5ac407411fa471ff9800a778d88a24685968b36824eaf4bee400"
 
 [[package]]
 name = "memoffset"
-version = "0.5.4"
+version = "0.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b4fc2c02a7e374099d4ee95a193111f72d2110197fe200272371758f6c3643d8"
+checksum = "c198b026e1bbf08a937e94c6c60f9ec4a2267f5b0d2eec9c1b21b061ce2be55f"
 dependencies = [
- "autocfg 1.0.0",
+ "autocfg 1.0.1",
+]
+
+[[package]]
+name = "miniz_oxide"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4d7559a8a40d0f97e1edea3220f698f78b1c5ab67532e49f68fde3910323b722"
+dependencies = [
+ "adler",
 ]
 
 [[package]]
 name = "nom"
-version = "5.1.1"
+version = "5.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b471253da97532da4b61552249c521e01e736071f71c1a4f7ebbfbf0a06aad6"
+checksum = "ffb4262d26ed83a1c0a33a38fe2bb15797329c85770da05e6b828ddb782627af"
 dependencies = [
  "memchr",
  "version_check",
@@ -560,13 +583,19 @@ dependencies = [
 
 [[package]]
 name = "num-traits"
-version = "0.2.11"
+version = "0.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c62be47e61d1842b9170f0fdeec8eba98e60e90e5446449a0545e5152acd7096"
+checksum = "ac267bcc07f48ee5f8935ab0d24f316fb722d7a1292e2913f0cc196b29ffd611"
 dependencies = [
- "autocfg 1.0.0",
+ "autocfg 1.0.1",
 ]
 
+[[package]]
+name = "object"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ab52be62400ca80aa00285d25253d7f7c437b7375c4de678f5405d3afe82ca5"
+
 [[package]]
 name = "peeking_take_while"
 version = "0.1.2"
@@ -575,33 +604,31 @@ checksum = "19b17cddbe7ec3f8bc800887bab5e717348c95ea2ca0b1bf0837fb964dc67099"
 
 [[package]]
 name = "pkg-config"
-version = "0.3.17"
+version = "0.3.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05da548ad6865900e60eaba7f589cc0783590a92e940c26953ff81ddbab2d677"
+checksum = "d36492546b6af1463394d46f0c834346f31548646f6ba10849802c9c9a27ac33"
 
 [[package]]
 name = "proc-macro-error"
-version = "1.0.2"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "98e9e4b82e0ef281812565ea4751049f1bdcdfccda7d3f459f2e138a40c08678"
+checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
 dependencies = [
  "proc-macro-error-attr",
- "proc-macro2 1.0.10",
+ "proc-macro2 1.0.20",
- "quote 1.0.3",
+ "quote 1.0.7",
- "syn 1.0.18",
+ "syn 1.0.40",
  "version_check",
 ]
 
 [[package]]
 name = "proc-macro-error-attr"
-version = "1.0.2"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4f5444ead4e9935abd7f27dc51f7e852a0569ac888096d5ec2499470794e2e53"
+checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
 dependencies = [
- "proc-macro2 1.0.10",
+ "proc-macro2 1.0.20",
- "quote 1.0.3",
+ "quote 1.0.7",
- "syn 1.0.18",
- "syn-mid",
  "version_check",
 ]
 
@@ -616,11 +643,11 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.10"
+version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "df246d292ff63439fea9bc8c0a270bed0e390d5ebd4db4ba15aba81111b5abe3"
+checksum = "175c513d55719db99da20232b06cda8bab6b83ec2d04e3283edf0213c37c1a29"
 dependencies = [
- "unicode-xid 0.2.0",
+ "unicode-xid 0.2.1",
 ]
 
 [[package]]
@@ -640,11 +667,11 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "1.0.3"
+version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2bdc6c187c65bca4260c9011c9e3132efe4909da44726bad24cf7572ae338d7f"
+checksum = "aa563d17ecb180e500da1cfd2b028310ac758de548efdd203e18f283af693f37"
 dependencies = [
- "proc-macro2 1.0.10",
+ "proc-macro2 1.0.20",
 ]
 
 [[package]]
@@ -787,9 +814,9 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.3.7"
+version = "1.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a6020f034922e3194c711b82a627453881bc4682166cabb07134a10c26ba7692"
+checksum = "9c3780fcf44b193bc4d09f36d2a3c87b251da4a046c87795a0d35f4f927ad8e6"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -799,9 +826,9 @@ dependencies = [
 
 [[package]]
 name = "regex-syntax"
-version = "0.6.17"
+version = "0.6.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fe5bd57d1d7414c6b5ed48563a2c855d995ff777729dcd91c369ec7fea395ae"
+checksum = "26412eb97c6b088a6997e05f69403a802a92d520de2f8e63c2b65f9e0f47c4e8"
 
 [[package]]
 name = "ring"
@@ -858,9 +885,9 @@ checksum = "dcf128d1287d2ea9d80910b5f1120d0b8eede3fbf1abe91c40d39ea7d51e6fda"
 
 [[package]]
 name = "ryu"
-version = "1.0.4"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed3d612bc64430efeb3f7ee6ef26d590dce0c43249217bddc62112540c7941e1"
+checksum = "71d301d4193d031abdd79ff7e3dd721168a9572ef3fe51a1517aba235bd8f86e"
 
 [[package]]
 name = "scopeguard"
@@ -885,26 +912,26 @@ checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
 [[package]]
 name = "serde"
-version = "1.0.106"
+version = "1.0.115"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "36df6ac6412072f67cf767ebbde4133a5b2e88e76dc6187fa7104cd16f783399"
+checksum = "e54c9a88f2da7238af84b5101443f0c0d0a3bbdc455e34a5c9497b1903ed55d5"
 
 [[package]]
 name = "serde_derive"
-version = "1.0.106"
+version = "1.0.115"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e549e3abf4fb8621bd1609f11dfc9f5e50320802273b12f3811a67e6716ea6c"
+checksum = "609feed1d0a73cc36a0182a840a9b37b4a82f0b1150369f0536a9e3f2a31dc48"
 dependencies = [
- "proc-macro2 1.0.10",
+ "proc-macro2 1.0.20",
- "quote 1.0.3",
+ "quote 1.0.7",
- "syn 1.0.18",
+ "syn 1.0.40",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.51"
+version = "1.0.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da07b57ee2623368351e9a0488bb0b261322a15a6e0ae53e243cbdc0f4208da9"
+checksum = "164eacbdb13512ec2745fb09d51fd5b22b0d65ed294a1dcf7285a360c80a675c"
 dependencies = [
  "itoa",
  "ryu",
@@ -931,9 +958,9 @@ checksum = "6446ced80d6c486436db5c078dde11a9f73d42b57fb273121e160b84f63d894c"
 
 [[package]]
 name = "structopt"
-version = "0.3.14"
+version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "863246aaf5ddd0d6928dfeb1a9ca65f505599e4e1b399935ef7e75107516b4ef"
+checksum = "6cc388d94ffabf39b5ed5fadddc40147cb21e605f53db6f8f36a625d27489ac5"
 dependencies = [
  "clap",
  "lazy_static",
@@ -942,15 +969,15 @@ dependencies = [
 
 [[package]]
 name = "structopt-derive"
-version = "0.4.7"
+version = "0.4.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d239ca4b13aee7a2142e6795cbd69e457665ff8037aed33b3effdc430d2f927a"
+checksum = "5e2513111825077552a6751dfad9e11ce0fba07d7276a3943a037d7e93e64c5f"
 dependencies = [
  "heck",
  "proc-macro-error",
- "proc-macro2 1.0.10",
+ "proc-macro2 1.0.20",
- "quote 1.0.3",
+ "quote 1.0.7",
- "syn 1.0.18",
+ "syn 1.0.40",
 ]
 
 [[package]]
@@ -966,36 +993,25 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.18"
+version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "410a7488c0a728c7ceb4ad59b9567eb4053d02e8cc7f5c0e0eeeb39518369213"
+checksum = "963f7d3cc59b59b9325165add223142bbf1df27655d07789f109896d353d8350"
 dependencies = [
- "proc-macro2 1.0.10",
+ "proc-macro2 1.0.20",
- "quote 1.0.3",
+ "quote 1.0.7",
- "unicode-xid 0.2.0",
+ "unicode-xid 0.2.1",
-]
-
-[[package]]
-name = "syn-mid"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7be3539f6c128a931cf19dcee741c1af532c7fd387baa739c03dd2e96479338a"
-dependencies = [
- "proc-macro2 1.0.10",
- "quote 1.0.3",
- "syn 1.0.18",
 ]
 
 [[package]]
 name = "synstructure"
-version = "0.12.3"
+version = "0.12.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "67656ea1dc1b41b1451851562ea232ec2e5a80242139f7e679ceccfb5d61f545"
+checksum = "b834f2d66f734cb897113e34aaff2f1ab4719ca946f9a7358dba8f8064148701"
 dependencies = [
- "proc-macro2 1.0.10",
+ "proc-macro2 1.0.20",
- "quote 1.0.3",
+ "quote 1.0.7",
- "syn 1.0.18",
+ "syn 1.0.40",
- "unicode-xid 0.2.0",
+ "unicode-xid 0.2.1",
 ]
 
 [[package]]
@@ -1027,11 +1043,12 @@ dependencies = [
 
 [[package]]
 name = "time"
-version = "0.1.43"
+version = "0.1.44"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca8a50ef2360fbd1eeb0ecd46795a87a19024eb4b53c5dc916ca1fd95fe62438"
+checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
 dependencies = [
  "libc",
+ "wasi",
  "winapi",
 ]
 
@@ -1043,9 +1060,9 @@ checksum = "e83e153d1053cbb5a118eeff7fd5be06ed99153f00dbcd8ae310c5fb2b22edc0"
 
 [[package]]
 name = "unicode-width"
-version = "0.1.7"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "caaa9d531767d1ff2150b9332433f32a24622147e5ebb1f26409d5da67afd479"
+checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
 
 [[package]]
 name = "unicode-xid"
@@ -1055,9 +1072,9 @@ checksum = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
 
 [[package]]
 name = "unicode-xid"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
+checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
 
 [[package]]
 name = "untrusted"
@@ -1076,15 +1093,21 @@ dependencies = [
 
 [[package]]
 name = "vec_map"
-version = "0.8.1"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
+checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
 
 [[package]]
 name = "version_check"
-version = "0.9.1"
+version = "0.9.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "078775d0255232fb988e6fccf26ddc9d1ac274299aaedcedce21c6f72cc533ce"
+checksum = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
+
+[[package]]
+name = "wasi"
+version = "0.10.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
 
 [[package]]
 name = "which"
@@ -1097,9 +1120,9 @@ dependencies = [
 
 [[package]]
 name = "winapi"
-version = "0.3.8"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
 dependencies = [
  "winapi-i686-pc-windows-gnu",
  "winapi-x86_64-pc-windows-gnu",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "fido2luks"
-version = "0.2.8"
+version = "0.2.16"
 authors = ["shimunn <shimun@shimun.net>"]
 edition = "2018"
 
@@ -11,7 +11,7 @@ repository = "https://github.com/shimunn/fido2luks"
 readme = "README.md"
 keywords = ["luks", "fido2", "u2f"]
 categories = ["command-line-utilities"]
-license-file = "LICENSE"
+license = "MPL-2.0"
 
 [dependencies]
 ctap_hmac = { version="0.4.2", features = ["request_multiple"] }
@@ -25,9 +25,32 @@ serde_json = "1.0.51"
 serde_derive = "1.0.106"
 serde = "1.0.106"
 
+[build-dependencies]
+ctap_hmac = { version="0.4.2", features = ["request_multiple"] }
+hex = "0.3.2"
+ring = "0.13.5"
+failure = "0.1.5"
+rpassword = "4.0.1"
+libcryptsetup-rs = "0.4.1"
+structopt = "0.3.2"
+
 [profile.release]
 lto = true
 opt-level = 'z'
 panic = 'abort'
 incremental = false
 overflow-checks = false
+
+[package.metadata.deb]
+depends = "$auto, cryptsetup"
+build-depends = "libclang-dev, libcryptsetup-dev"
+extended-description = "Decrypt your LUKS partition using a FIDO2 compatible authenticator"
+assets = [
+    ["target/release/fido2luks", "usr/bin/", "755"],
+    ["fido2luks.bash", "usr/share/bash-completion/completions/fido2luks", "644"],
+    ["pam_mount/fido2luksmounthelper.sh", "usr/bin/", "755"],
+    ["initramfs-tools/keyscript.sh", "/lib/cryptsetup/scripts/fido2luks", "755" ],
+    ["initramfs-tools/hook/fido2luks.sh", "etc/initramfs-tools/hooks/", "755" ],
+    ["initramfs-tools/fido2luks.conf", "etc/", "644"],
+]
+conf-files = ["/etc/fido2luks.conf"]

PKGBUILD

@@ -0,0 +1,26 @@
+# Maintainer: shimunn <shimun@shimun.net>
+pkgname=fido2luks
+pkgver=0.2.12
+pkgrel=1
+makedepends=('rust' 'cargo' 'cryptsetup' 'clang')
+depends=('cryptsetup')
+arch=('i686' 'x86_64' 'armv6h' 'armv7h')
+pkgdesc="Decrypt your LUKS partition using a FIDO2 compatible authenticator"
+url="https://github.com/shimunn/fido2luks"
+license=('MPL-2.0')
+
+pkgver() {
+	# Use tag version if possible otherwise concat project version and git ref
+	git describe --exact-match --tags HEAD 2> /dev/null || \
+		echo "$(cargo pkgid | cut -d'#' -f2).$(git describe --always)"
+}
+
+build() {
+    cargo build --release --locked --all-features --target-dir=target
+}
+
+package() {
+    install -Dm 755 target/release/${pkgname} -t "${pkgdir}/usr/bin"
+    install -Dm 755 ../pam_mount/fido2luksmounthelper.sh -t "${pkgdir}/usr/bin"
+    install -Dm 644 ../fido2luks.bash "${pkgdir}/usr/share/bash-completion/completions/fido2luks"
+}

README.md

@@ -1,8 +1,8 @@
 # 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
+This will allow you to unlock your LUKS encrypted disk with an FIDO2 compatible key.
 
-Note: This has only been tested under Fedora 31 using a Solo Key, Trezor Model T
+Note: This has only been tested under Fedora 31, [Ubuntu 20.04](initramfs-tools/), [NixOS](https://nixos.org/nixos/manual/#sec-luks-file-systems-fido2) using a Solo Key, Trezor Model T, YubiKey(fw >= [5.2.3](https://support.yubico.com/hc/en-us/articles/360016649319-YubiKey-5-2-3-Enhancements-to-FIDO-2-Support))
 
 ## Setup
 
@@ -30,6 +30,8 @@ set -a
 . /etc/fido2luks.conf
 
 # Repeat for each luks volume
+# You can also use the `--token` flag when using LUKS2 which will then store the credential in the LUKS header,
+# enabling you to use `fido2luks open-token` without passing a credential as parameter
 sudo -E fido2luks -i add-key /dev/disk/by-uuid/<DISK_UUID>
 
 # Test(only works if the luks container isn't active)
@@ -63,7 +65,7 @@ cp /usr/bin/fido2luks /boot/fido2luks/
 cp /etc/fido2luks.conf /boot/fido2luks/
 ```
 
-## Test
+## Testing
 
 Just reboot and see if it works, if that's the case you should remove your old less secure password from your LUKS header:
 
@@ -71,6 +73,8 @@ Just reboot and see if it works, if that's the case you should remove your old l
 # 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
+# You can also pass `--token` if you're using LUKS2 which will then store the credential in the LUKS header,
+# which will enable you to use `fido2luks open-token` without passing a credential as parameter
 fido2luks -i add-key --exclusive /dev/disk/by-uuid/<DISK_UUID>
 ```
 
@@ -92,6 +96,13 @@ set -a
 
 Then add the new secret to each device and update dracut afterwards `dracut -f`
 
+### Multiple keys
+
+Additional/backup keys are supported, Multiple fido2luks credentials can be added to your /etc/fido2luks.conf file. Credential tokens are comma separated.
+```
+FIDO2LUKS_CREDENTIAL_ID=<CREDENTIAL1>,<CREDENTIAL2>,<CREDENTIAL3>
+```
+
 ## Removal
 
 Remove `rd.luks.2fa` from `GRUB_CMDLINE_LINUX` in /etc/default/grub
@@ -103,3 +114,17 @@ 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
 ```
+
+## License
+
+Licensed under
+
+ * Mozilla Public License 2.0, ([LICENSE-MPL](LICENSE-MPL) or https://www.mozilla.org/en-US/MPL/2.0/)
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally
+submitted for inclusion in the work by you, as defined in the MPL 2.0
+license, shall be licensed as above, without any additional terms or
+conditions.
+

build.rs

@@ -0,0 +1,24 @@
+#![allow(warnings)]
+#[macro_use]
+extern crate failure;
+extern crate ctap_hmac as ctap;
+
+#[path = "src/cli_args/mod.rs"]
+mod cli_args;
+#[path = "src/error.rs"]
+mod error;
+#[path = "src/util.rs"]
+mod util;
+
+use cli_args::Args;
+use std::env;
+use std::str::FromStr;
+use structopt::clap::Shell;
+use structopt::StructOpt;
+
+fn main() {
+    // generate completion scripts, zsh does panic for some reason
+    for shell in Shell::variants().iter().filter(|shell| **shell != "zsh") {
+        Args::clap().gen_completions(env!("CARGO_PKG_NAME"), Shell::from_str(shell).unwrap(), ".");
+    }
+}

flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "naersk": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1612192764,
+        "narHash": "sha256-7EnLtZQWP6511G1ZPA7FmJlqAr3hWsAYb24tvTvJ/ec=",
+        "owner": "nmattia",
+        "repo": "naersk",
+        "rev": "6e149bfd726a8ebefa415f2d713ba6d942435abd",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nmattia",
+        "repo": "naersk",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1611910458,
+        "narHash": "sha256-//j54S14v9lp3YKizS1WZW3WKwLjGTzvwhHfUAaRBPQ=",
+        "path": "/nix/store/z5g10k571cc5q9yvr0bafzswp0ggawjw-source",
+        "rev": "6e7f25001fe6874f7ae271891f709bbf50a22c45",
+        "type": "path"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "naersk": "naersk",
+        "nixpkgs": "nixpkgs",
+        "utils": "utils"
+      }
+    },
+    "utils": {
+      "locked": {
+        "lastModified": 1610051610,
+        "narHash": "sha256-U9rPz/usA1/Aohhk7Cmc2gBrEEKRzcW4nwPWMPwja4Y=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "3982c9903e93927c2164caa727cd3f6a0e6d14cc",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,61 @@
+{
+  description = "Decrypt your LUKS partition using a FIDO2 compatible authenticator";
+
+  inputs = {
+    utils.url = "github:numtide/flake-utils";
+    naersk = {
+      url = "github:nmattia/naersk";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, utils, naersk }:
+    let
+      root = ./.;
+      pname = (builtins.fromTOML (builtins.readFile ./Cargo.toml)).package.name;
+      forPkgs = pkgs:
+        let
+          naersk-lib = naersk.lib."${pkgs.system}";
+          buildInputs = with pkgs; [ cryptsetup ];
+          LIBCLANG_PATH = "${pkgs.clang.cc.lib}/lib";
+          nativeBuildInputs = with pkgs; [
+            pkgconfig
+            clang
+          ];
+        in
+        rec {
+          # `nix build`
+          packages.${pname} = naersk-lib.buildPackage {
+            inherit pname root buildInputs nativeBuildInputs LIBCLANG_PATH;
+          };
+          defaultPackage = packages.${pname};
+
+          # `nix run`
+          apps.${pname} = utils.lib.mkApp {
+            drv = packages.${pname};
+          };
+          defaultApp = apps.${pname};
+
+          # `nix flake check`
+          checks = {
+            fmt = with pkgs; runCommandLocal "${pname}-fmt" { buildInputs = [ cargo rustfmt nixpkgs-fmt ]; } ''
+              cd ${root}
+              cargo fmt -- --check
+              nixpkgs-fmt --check *.nix
+              touch $out
+            '';
+          };
+
+          # `nix develop`
+          devShell = pkgs.mkShell {
+            nativeBuildInputs = with pkgs; [ rustc cargo rustfmt nixpkgs-fmt ] ++ nativeBuildInputs;
+            inherit buildInputs LIBCLANG_PATH;
+          };
+        };
+      forSystem = system: forPkgs nixpkgs.legacyPackages."${system}";
+    in
+    (utils.lib.eachSystem [ "aarch64-linux" "i686-linux" "x86_64-linux" ] forSystem) // {
+      overlay = final: prev: (forPkgs final).packages;
+    };
+
+}

initramfs-tools/Makefile

@@ -0,0 +1,11 @@
+.PHONY: install
+install:
+	chmod +x hook/fido2luks.sh keyscript.sh
+	cp -f hook/fido2luks.sh /etc/initramfs-tools/hooks/
+	mkdir -p /usr/share/fido2luks
+	cp -f keyscript.sh /lib/cryptsetup/scripts/fido2luks
+	update-initramfs -u
+remove:
+	sh -c "grep 'keyscript=fido2luks' -i /etc/crypttab && ( echo 'ERROR: your system is still setup to use fido2luks during boot' && exit 1) || exit 0"
+	rm /etc/initramfs-tools/hooks/fido2luks.sh /lib/cryptsetup/scripts/fido2luks
+	update-initramfs -u

initramfs-tools/README.md

@@ -0,0 +1,34 @@
+## Initramfs-tools based systems(Ubuntu and derivatives)
+
+For easiest installation [download and install the precompiled deb from releases.](https://github.com/shimunn/fido2luks/releases). However it is possible to build from source via the instructions on the main readme.
+
+```
+sudo -s
+
+# Insert FIDO key.
+fido2luks credential
+# Tap FIDO key
+# Copy returned string <CREDENTIAL>
+
+nano /etc/fido2luks.conf
+# Insert <CREDENTIAL> 
+# FIDO2LUKS_CREDENTIAL_ID=<CREDENTIAL> 
+
+set -a
+. /etc/fido2luks.conf
+fido2luks -i add-key /dev/<LUKS PARTITION>
+# Current password: <Any current LUKS password>
+# Password: <Password used as FIDO challange>
+# Tap FIDO key
+
+nano /etc/crypttab
+# Append to end ",discard,initramfs,keyscript=fido2luks"
+# E.g. sda6_crypt UUID=XXXXXXXXXX none luks,discard,initramfs,keyscript=fido2luks
+
+update-initramfs -u
+
+
+```
+
+[Recording showing part of the setup](https://shimun.net/fido2luks/setup.svg)
+

initramfs-tools/fido2luks.conf

@@ -0,0 +1,3 @@
+FIDO2LUKS_SALT=Ask
+#FIDO2LUKS_PASSWORD_HELPER="/usr/bin/plymouth ask-for-password --prompt 'FIDO2 password salt'"
+FIDO2LUKS_CREDENTIAL_ID=

initramfs-tools/hook/fido2luks.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+case "$1" in
+prereqs)
+	echo ""
+	exit 0
+	;;
+
+esac
+
+. /usr/share/initramfs-tools/hook-functions
+copy_file config /etc/fido2luks.conf /etc/fido2luks.conf
+copy_exec /usr/bin/fido2luks
+exit 0

initramfs-tools/keyscript.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+set -a
+. /etc/fido2luks.conf
+
+if [ -z "$FIDO2LUKS_PASSWORD_HELPER" ]; then
+	MSG="FIDO2 password salt for $CRYPTTAB_NAME"
+	export FIDO2LUKS_PASSWORD_HELPER="plymouth ask-for-password --prompt '$MSG'"
+fi
+
+if [ "$FIDO2LUKS_USE_TOKEN" -eq 1 ]; then
+	export FIDO2LUKS_CREDENTIAL_ID="$FIDO2LUKS_CREDENTIAL_ID,$(fido2luks token list --csv $CRYPTTAB_SOURCE)"
+fi
+
+fido2luks print-secret --bin

pam_mount/fido2luksmounthelper.sh

@@ -0,0 +1,220 @@
+#!/bin/bash
+#
+# This is a rather minimal example Argbash potential
+# Example taken from http://argbash.readthedocs.io/en/stable/example.html
+#
+# ARG_POSITIONAL_SINGLE([operation],[Operation to perform (mount|umount)],[])
+# ARG_OPTIONAL_SINGLE([credentials-type],[c],[Type of the credentials to use (external|embedded)])
+# ARG_OPTIONAL_SINGLE([device],[d],[Name of the device to create])
+# ARG_OPTIONAL_SINGLE([mount-point],[m],[Path of the mount point to use])
+# ARG_OPTIONAL_BOOLEAN([ask-pin],[a],[Ask for a pin],[off])
+# ARG_OPTIONAL_SINGLE([salt],[s],[Salt to use],[""])
+# ARG_HELP([Unlocks/Locks a LUKS volume and mount/unmount it in the given mount point.])
+# ARGBASH_GO()
+# needed because of Argbash --> m4_ignore([
+### START OF CODE GENERATED BY Argbash v2.9.0 one line above ###
+# Argbash is a bash code generator used to get arguments parsing right.
+# Argbash is FREE SOFTWARE, see https://argbash.io for more info
+# Generated online by https://argbash.io/generate
+
+
+die()
+{
+	local _ret="${2:-1}"
+	test "${_PRINT_HELP:-no}" = yes && print_help >&2
+	echo "$1" >&2
+	exit "${_ret}"
+}
+
+
+begins_with_short_option()
+{
+	local first_option all_short_options='cdmash'
+	first_option="${1:0:1}"
+	test "$all_short_options" = "${all_short_options/$first_option/}" && return 1 || return 0
+}
+
+# THE DEFAULTS INITIALIZATION - POSITIONALS
+_positionals=()
+# THE DEFAULTS INITIALIZATION - OPTIONALS
+_arg_credentials_type=
+_arg_device=
+_arg_mount_point=
+_arg_ask_pin="off"
+_arg_salt=""
+
+
+print_help()
+{
+	printf '%s\n' "Unlocks/Locks a LUKS volume and mount/unmount it in the given mount point."
+	printf 'Usage: %s [-c|--credentials-type <arg>] [-d|--device <arg>] [-m|--mount-point <arg>] [-a|--(no-)ask-pin] [-s|--salt <arg>] [-h|--help] <operation>\n' "$0"
+	printf '\t%s\n' "<operation>: Operation to perform (mount|umount)"
+	printf '\t%s\n' "-c, --credentials-type: Type of the credentials to use (external|embedded) (no default)"
+	printf '\t%s\n' "-d, --device: Name of the device to create (no default)"
+	printf '\t%s\n' "-m, --mount-point: Path of the mount point to use (no default)"
+	printf '\t%s\n' "-a, --ask-pin, --no-ask-pin: Ask for a pin (off by default)"
+	printf '\t%s\n' "-s, --salt: Salt to use (default: '""')"
+	printf '\t%s\n' "-h, --help: Prints help"
+}
+
+
+parse_commandline()
+{
+	_positionals_count=0
+	while test $# -gt 0
+	do
+		_key="$1"
+		case "$_key" in
+			-c|--credentials-type)
+				test $# -lt 2 && die "Missing value for the optional argument '$_key'." 1
+				_arg_credentials_type="$2"
+				shift
+				;;
+			--credentials-type=*)
+				_arg_credentials_type="${_key##--credentials-type=}"
+				;;
+			-c*)
+				_arg_credentials_type="${_key##-c}"
+				;;
+			-d|--device)
+				test $# -lt 2 && die "Missing value for the optional argument '$_key'." 1
+				_arg_device="$2"
+				shift
+				;;
+			--device=*)
+				_arg_device="${_key##--device=}"
+				;;
+			-d*)
+				_arg_device="${_key##-d}"
+				;;
+			-m|--mount-point)
+				test $# -lt 2 && die "Missing value for the optional argument '$_key'." 1
+				_arg_mount_point="$2"
+				shift
+				;;
+			--mount-point=*)
+				_arg_mount_point="${_key##--mount-point=}"
+				;;
+			-m*)
+				_arg_mount_point="${_key##-m}"
+				;;
+			-a|--no-ask-pin|--ask-pin)
+				_arg_ask_pin="on"
+				test "${1:0:5}" = "--no-" && _arg_ask_pin="off"
+				;;
+			-a*)
+				_arg_ask_pin="on"
+				_next="${_key##-a}"
+				if test -n "$_next" -a "$_next" != "$_key"
+				then
+					{ begins_with_short_option "$_next" && shift && set -- "-a" "-${_next}" "$@"; } || die "The short option '$_key' can't be decomposed to ${_key:0:2} and -${_key:2}, because ${_key:0:2} doesn't accept value and '-${_key:2:1}' doesn't correspond to a short option."
+				fi
+				;;
+			-s|--salt)
+				test $# -lt 2 && die "Missing value for the optional argument '$_key'." 1
+				_arg_salt="$2"
+				shift
+				;;
+			--salt=*)
+				_arg_salt="${_key##--salt=}"
+				;;
+			-s*)
+				_arg_salt="${_key##-s}"
+				;;
+			-h|--help)
+				print_help
+				exit 0
+				;;
+			-h*)
+				print_help
+				exit 0
+				;;
+			*)
+				_last_positional="$1"
+				_positionals+=("$_last_positional")
+				_positionals_count=$((_positionals_count + 1))
+				;;
+		esac
+		shift
+	done
+}
+
+
+handle_passed_args_count()
+{
+	local _required_args_string="'operation'"
+	test "${_positionals_count}" -ge 1 || _PRINT_HELP=yes die "FATAL ERROR: Not enough positional arguments - we require exactly 1 (namely: $_required_args_string), but got only ${_positionals_count}." 1
+	test "${_positionals_count}" -le 1 || _PRINT_HELP=yes die "FATAL ERROR: There were spurious positional arguments --- we expect exactly 1 (namely: $_required_args_string), but got ${_positionals_count} (the last one was: '${_last_positional}')." 1
+}
+
+
+assign_positional_args()
+{
+	local _positional_name _shift_for=$1
+	_positional_names="_arg_operation "
+
+	shift "$_shift_for"
+	for _positional_name in ${_positional_names}
+	do
+		test $# -gt 0 || break
+		eval "$_positional_name=\${1}" || die "Error during argument parsing, possibly an Argbash bug." 1
+		shift
+	done
+}
+
+parse_commandline "$@"
+handle_passed_args_count
+assign_positional_args 1 "${_positionals[@]}"
+
+# OTHER STUFF GENERATED BY Argbash
+
+### END OF CODE GENERATED BY Argbash (sortof) ### ])
+# [ <-- needed because of Argbash
+
+if [ -z ${_arg_mount_point} ]; then
+  die "Missing '--mount-point' argument"
+fi
+
+if [ -z ${_arg_device} ]; then
+  die "Missing '--device' argument"
+fi
+
+ASK_PIN=${_arg_ask_pin}
+OPERATION=${_arg_operation}
+DEVICE=${_arg_device}
+DEVICE_NAME=$(sed "s|/|_|g" <<< ${DEVICE})
+MOUNT_POINT=${_arg_mount_point}
+CREDENTIALS_TYPE=${_arg_credentials_type}
+SALT=${_arg_salt}
+CONF_FILE_PATH="/etc/fido2luksmounthelper.conf"
+
+if [ "${OPERATION}" == "mount" ]; then
+	if [ "${CREDENTIALS_TYPE}" == "external" ]; then
+    if  [ -f ${CONF_FILE_PATH} ]; then
+			if [ "${ASK_PIN}" == "on" ]; then
+				read PASSWORD
+			fi
+			CREDENTIALS=$(<${CONF_FILE_PATH})
+		else
+			die "The configuration file '${CONF_FILE_PATH}' is missing. Please create it or use embedded credentials."
+		fi
+		printf ${PASSWORD} | fido2luks open --salt string:${SALT} --pin --pin-source /dev/stdin ${DEVICE} ${DEVICE_NAME} ${CREDENTIALS}
+	elif [ "${CREDENTIALS_TYPE}" == "embedded" ]; then
+		if [ "${ASK_PIN}" == "on" ]; then
+			read PASSWORD
+		fi
+		printf ${PASSWORD} | fido2luks open-token --salt string:${SALT} --pin --pin-source /dev/stdin ${DEVICE} ${DEVICE_NAME}
+	else
+		die "Given credential-type '${CREDENTIALS_TYPE}' is invalid. It must be 'external' or 'embedded'"
+	fi 
+	mount /dev/mapper/${DEVICE_NAME} ${MOUNT_POINT}
+elif [ "${OPERATION}" == "umount" ]; then
+  umount ${MOUNT_POINT}
+  cryptsetup luksClose ${DEVICE_NAME}
+else
+  die "Given operation '${OPERATION}' is invalid. It must be 'mount' or 'unmount'"
+fi
+
+exit 0
+
+# ] <-- needed because of Argbash

src/cli.rs

@@ -1,127 +1,36 @@
 use crate::error::*;
-use crate::luks;
+use crate::luks::{Fido2LuksToken, LuksDevice};
+use crate::util::sha256;
 use crate::*;
+use cli_args::*;
 
+use structopt::clap::Shell;
 use structopt::StructOpt;
 
 use ctap::{FidoCredential, FidoErrorKind};
-use failure::_core::fmt::{Display, Error, Formatter};
-use failure::_core::str::FromStr;
-use failure::_core::time::Duration;
-use std::io::Write;
-use std::process::exit;
-use std::thread;
 
-use crate::util::sha256;
+use std::io::{Read, Write};
+use std::str::FromStr;
+use std::thread;
+use std::time::Duration;
+
 use std::borrow::Cow;
+use std::collections::HashSet;
+use std::fs::File;
 use std::time::SystemTime;
 
-#[derive(Debug, Eq, PartialEq, Clone)]
+pub use cli_args::Args;
-pub struct HexEncoded(pub Vec<u8>);
 
-impl Display for HexEncoded {
+fn read_pin(ap: &AuthenticatorParameters) -> Fido2LuksResult<String> {
-    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error> {
+    if let Some(src) = ap.pin_source.as_ref() {
-        f.write_str(&hex::encode(&self.0))
+        let mut pin = String::new();
+        File::open(src)?.read_to_string(&mut pin)?;
+        Ok(pin.trim_end_matches("\n").to_string()) //remove trailing newline
+    } else {
+        util::read_password("Authenticator PIN", false)
     }
 }
 
-impl FromStr for HexEncoded {
-    type Err = hex::FromHexError;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        Ok(HexEncoded(hex::decode(s)?))
-    }
-}
-
-#[derive(Debug, Eq, PartialEq, Clone)]
-pub struct CommaSeparated<T: FromStr + Display>(pub Vec<T>);
-
-impl<T: Display + FromStr> Display for CommaSeparated<T> {
-    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error> {
-        for i in &self.0 {
-            f.write_str(&i.to_string())?;
-            f.write_str(",")?;
-        }
-        Ok(())
-    }
-}
-
-impl<T: Display + FromStr> FromStr for CommaSeparated<T> {
-    type Err = <T as FromStr>::Err;
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        Ok(CommaSeparated(
-            s.split(',')
-                .map(|part| <T as FromStr>::from_str(part))
-                .collect::<Result<Vec<_>, _>>()?,
-        ))
-    }
-}
-
-#[derive(Debug, StructOpt)]
-pub struct Credentials {
-    /// FIDO credential ids, seperated by ',' generate using fido2luks credential
-    #[structopt(name = "credential-id", env = "FIDO2LUKS_CREDENTIAL_ID")]
-    pub ids: CommaSeparated<HexEncoded>,
-}
-
-#[derive(Debug, StructOpt)]
-pub struct AuthenticatorParameters {
-    /// Request a PIN to unlock the authenticator
-    #[structopt(short = "P", long = "pin")]
-    pub pin: bool,
-
-    /// 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_time: u64,
-}
-
-#[derive(Debug, StructOpt)]
-pub struct LuksParameters {
-    #[structopt(env = "FIDO2LUKS_DEVICE")]
-    device: PathBuf,
-
-    /// Try to unlock the device using a specifc keyslot, ignore all other slots
-    #[structopt(long = "slot", env = "FIDO2LUKS_DEVICE_SLOT")]
-    slot: Option<u32>,
-}
-
-#[derive(Debug, StructOpt, Clone)]
-pub struct LuksModParameters {
-    /// Number of milliseconds required to derive the volume decryption key
-    /// Defaults to 10ms when using an authenticator or the default by cryptsetup when using a password
-    #[structopt(long = "kdf-time", name = "kdf-time")]
-    kdf_time: Option<u64>,
-}
-
-#[derive(Debug, StructOpt)]
-pub struct SecretParameters {
-    /// 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/env systemd-ask-password 'Please enter second factor for LUKS disk encryption!'"
-    )]
-    pub password_helper: PasswordHelper,
-}
-
 fn derive_secret(
     credentials: &[HexEncoded],
     salt: &[u8; 32],
@@ -158,136 +67,16 @@ fn derive_secret(
     Ok((sha256(&[salt, &unsalted[..]]), cred.clone()))
 }
 
-fn read_pin() -> Fido2LuksResult<String> {
-    util::read_password("Authenticator PIN", false)
-}
-
-#[derive(Debug, StructOpt)]
-pub struct Args {
-    /// Request passwords via Stdin instead of using the password helper
-    #[structopt(short = "i", long = "interactive")]
-    pub interactive: bool,
-    #[structopt(subcommand)]
-    pub command: Command,
-}
-
-#[derive(Debug, StructOpt, Clone)]
-pub struct OtherSecret {
-    /// Use a keyfile instead of a password
-    #[structopt(short = "d", long = "keyfile", conflicts_with = "fido_device")]
-    keyfile: Option<PathBuf>,
-    /// Use another fido device instead of a password
-    /// Note: this requires for the credential fot the other device to be passed as argument as well
-    #[structopt(short = "f", long = "fido-device", conflicts_with = "keyfile")]
-    fido_device: bool,
-}
-
-#[derive(Debug, StructOpt)]
-pub enum Command {
-    #[structopt(name = "print-secret")]
-    PrintSecret {
-        /// Prints the secret as binary instead of hex encoded
-        #[structopt(short = "b", long = "bin")]
-        binary: bool,
-        #[structopt(flatten)]
-        credentials: Credentials,
-        #[structopt(flatten)]
-        authenticator: AuthenticatorParameters,
-        #[structopt(flatten)]
-        secret: SecretParameters,
-    },
-    /// Adds a generated key to the specified LUKS device
-    #[structopt(name = "add-key")]
-    AddKey {
-        #[structopt(flatten)]
-        luks: LuksParameters,
-        #[structopt(flatten)]
-        credentials: Credentials,
-        #[structopt(flatten)]
-        authenticator: AuthenticatorParameters,
-        #[structopt(flatten)]
-        secret: SecretParameters,
-        /// Will wipe all other keys
-        #[structopt(short = "e", long = "exclusive")]
-        exclusive: bool,
-        /// Will add an token to your LUKS 2 header, including the credential id
-        #[structopt(short = "t", long = "token")]
-        token: bool,
-        #[structopt(flatten)]
-        existing_secret: OtherSecret,
-        #[structopt(flatten)]
-        luks_mod: LuksModParameters,
-    },
-    /// Replace a previously added key with a password
-    #[structopt(name = "replace-key")]
-    ReplaceKey {
-        #[structopt(flatten)]
-        luks: LuksParameters,
-        #[structopt(flatten)]
-        credentials: Credentials,
-        #[structopt(flatten)]
-        authenticator: AuthenticatorParameters,
-        #[structopt(flatten)]
-        secret: SecretParameters,
-        /// Add the password and keep the key
-        #[structopt(short = "a", long = "add-password")]
-        add_password: bool,
-        /// Will add an token to your LUKS 2 header, including the credential id
-        #[structopt(short = "t", long = "token")]
-        token: bool,
-        #[structopt(flatten)]
-        replacement: OtherSecret,
-        #[structopt(flatten)]
-        luks_mod: LuksModParameters,
-    },
-    /// Open the LUKS device
-    #[structopt(name = "open")]
-    Open {
-        #[structopt(flatten)]
-        luks: LuksParameters,
-        #[structopt(env = "FIDO2LUKS_MAPPER_NAME")]
-        name: String,
-        #[structopt(flatten)]
-        credentials: Credentials,
-        #[structopt(flatten)]
-        authenticator: AuthenticatorParameters,
-        #[structopt(flatten)]
-        secret: SecretParameters,
-        #[structopt(short = "r", long = "max-retries", default_value = "0")]
-        retries: i32,
-    },
-    /// Open the LUKS device using credentials embedded in the LUKS 2 header
-    #[structopt(name = "open-token")]
-    OpenToken {
-        #[structopt(flatten)]
-        luks: LuksParameters,
-        #[structopt(env = "FIDO2LUKS_MAPPER_NAME")]
-        name: String,
-        #[structopt(flatten)]
-        authenticator: AuthenticatorParameters,
-        #[structopt(flatten)]
-        secret: SecretParameters,
-        #[structopt(short = "r", long = "max-retries", default_value = "0")]
-        retries: i32,
-    },
-    /// Generate a new FIDO credential
-    #[structopt(name = "credential")]
-    Credential {
-        #[structopt(flatten)]
-        authenticator: AuthenticatorParameters,
-        /// 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,
-}
-
 pub fn parse_cmdline() -> Args {
     Args::from_args()
 }
 
+pub fn prompt_interaction(interactive: bool) {
+    if interactive {
+        println!("Authorize using your FIDO device");
+    }
+}
+
 pub fn run_cli() -> Fido2LuksResult<()> {
     let mut stdout = io::stdout();
     let args = parse_cmdline();
@@ -299,7 +88,7 @@ pub fn run_cli() -> Fido2LuksResult<()> {
         } => {
             let pin_string;
             let pin = if authenticator.pin {
-                pin_string = read_pin()?;
+                pin_string = read_pin(authenticator)?;
                 Some(pin_string.as_ref())
             } else {
                 None
@@ -316,7 +105,7 @@ pub fn run_cli() -> Fido2LuksResult<()> {
         } => {
             let pin_string;
             let pin = if authenticator.pin {
-                pin_string = read_pin()?;
+                pin_string = read_pin(authenticator)?;
                 Some(pin_string.as_ref())
             } else {
                 None
@@ -324,8 +113,9 @@ pub fn run_cli() -> Fido2LuksResult<()> {
             let salt = if interactive || secret.password_helper == PasswordHelper::Stdin {
                 util::read_password_hashed("Password", false)
             } else {
-                secret.salt.obtain(&secret.password_helper)
+                secret.salt.obtain_sha256(&secret.password_helper)
             }?;
+            prompt_interaction(interactive);
             let (secret, _cred) = derive_secret(
                 credentials.ids.0.as_slice(),
                 &salt,
@@ -360,7 +150,7 @@ pub fn run_cli() -> Fido2LuksResult<()> {
             ..
         } => {
             let pin = if authenticator.pin {
-                Some(read_pin()?)
+                Some(read_pin(authenticator)?)
             } else {
                 None
             };
@@ -368,10 +158,12 @@ pub fn run_cli() -> Fido2LuksResult<()> {
                 if interactive || secret.password_helper == PasswordHelper::Stdin {
                     util::read_password_hashed(q, verify)
                 } else {
-                    secret.salt.obtain(&secret.password_helper)
+                    secret.salt.obtain_sha256(&secret.password_helper)
                 }
             };
-            let other_secret = |salt_q: &str, verify: bool| -> Fido2LuksResult<(Vec<u8>, Option<FidoCredential>)> {
+            let other_secret = |salt_q: &str,
+                                verify: bool|
+             -> Fido2LuksResult<(Vec<u8>, Option<FidoCredential>)> {
                 match other_secret {
                     OtherSecret {
                         keyfile: Some(file),
@@ -379,40 +171,45 @@ pub fn run_cli() -> Fido2LuksResult<()> {
                     } => Ok((util::read_keyfile(file)?, None)),
                     OtherSecret {
                         fido_device: true, ..
-                    } => Ok(derive_secret(
+                    } => {
-                        &credentials.ids.0,
+                        prompt_interaction(interactive);
-                        &salt(salt_q, verify)?,
+                        Ok(derive_secret(
-                        authenticator.await_time,
+                            &credentials.ids.0,
-                        pin.as_deref(),
+                            &salt(salt_q, verify)?,
-                    )
+                            authenticator.await_time,
-                    .map(|(secret, cred)| (secret[..].to_vec(), Some(cred)))?),
+                            pin.as_deref(),
-                    _ => Ok((util::read_password(salt_q, verify)?.as_bytes().to_vec(), None)),
+                        )
+                        .map(|(secret, cred)| (secret[..].to_vec(), Some(cred)))?)
+                    }
+                    _ => Ok((
+                        util::read_password(salt_q, verify)?.as_bytes().to_vec(),
+                        None,
+                    )),
                 }
             };
-            let secret = |verify: bool| -> Fido2LuksResult<([u8; 32], FidoCredential)> {
+            let secret = |q: &str, verify: bool| -> Fido2LuksResult<([u8; 32], FidoCredential)> {
+                prompt_interaction(interactive);
                 derive_secret(
                     &credentials.ids.0,
-                    &salt("Password", verify)?,
+                    &salt(q, verify)?,
                     authenticator.await_time,
                     pin.as_deref(),
                 )
             };
+            let mut luks_dev = LuksDevice::load(&luks.device)?;
             // Non overlap
             match &args.command {
-                Command::AddKey {
+                Command::AddKey { exclusive, .. } => {
-                    exclusive,  ..
-                } => {
                     let (existing_secret, _) = other_secret("Current password", false)?;
-                    let (new_secret, cred) = secret(true)?;
+                    let (new_secret, cred) = secret("Password to be added", true)?;
-                    let added_slot = luks::add_key(
+                    let added_slot = luks_dev.add_key(
-                        &luks.device,
                         &new_secret,
                         &existing_secret[..],
                         luks_mod.kdf_time.or(Some(10)),
                         Some(&cred.id[..]).filter(|_| *token),
                     )?;
                     if *exclusive {
-                        let destroyed = luks::remove_keyslots(&luks.device, &[added_slot])?;
+                        let destroyed = luks_dev.remove_keyslots(&[added_slot])?;
                         println!(
                             "Added to key to device {}, slot: {}\nRemoved {} old keys",
                             luks.device.display(),
@@ -429,19 +226,17 @@ pub fn run_cli() -> Fido2LuksResult<()> {
                     Ok(())
                 }
                 Command::ReplaceKey { add_password, .. } => {
-                    let (existing_secret, _) = secret(false)?;
+                    let (existing_secret, _) = secret("Current password", false)?;
                     let (replacement_secret, cred) = other_secret("Replacement password", true)?;
                     let slot = if *add_password {
-                        luks::add_key(
+                        luks_dev.add_key(
-                            &luks.device,
                             &replacement_secret[..],
                             &existing_secret,
                             luks_mod.kdf_time,
                             cred.as_ref().filter(|_| *token).map(|cred| &cred.id[..]),
                         )
                     } else {
-                        luks::replace_key(
+                        luks_dev.replace_key(
-                            &luks.device,
                             &replacement_secret[..],
                             &existing_secret,
                             luks_mod.kdf_time,
@@ -475,7 +270,7 @@ pub fn run_cli() -> Fido2LuksResult<()> {
         } => {
             let pin_string;
             let pin = if authenticator.pin {
-                pin_string = read_pin()?;
+                pin_string = read_pin(authenticator)?;
                 Some(pin_string.as_ref())
             } else {
                 None
@@ -484,12 +279,13 @@ pub fn run_cli() -> Fido2LuksResult<()> {
                 if interactive || secret.password_helper == PasswordHelper::Stdin {
                     util::read_password_hashed(q, verify)
                 } else {
-                    secret.salt.obtain(&secret.password_helper)
+                    secret.salt.obtain_sha256(&secret.password_helper)
                 }
             };
 
             // Cow shouldn't be necessary
             let secret = |credentials: Cow<'_, Vec<HexEncoded>>| {
+                prompt_interaction(interactive);
                 derive_secret(
                     credentials.as_ref(),
                     &salt("Password", false)?,
@@ -499,14 +295,12 @@ pub fn run_cli() -> Fido2LuksResult<()> {
             };
 
             let mut retries = *retries;
+            let mut luks_dev = LuksDevice::load(&luks.device)?;
             loop {
                 let secret = match &args.command {
                     Command::Open { credentials, .. } => secret(Cow::Borrowed(&credentials.ids.0))
-                        .and_then(|(secret, _cred)| {
+                        .and_then(|(secret, _cred)| luks_dev.activate(&name, &secret, luks.slot)),
-                            luks::open_container(&luks.device, &name, &secret, luks.slot)
+                    Command::OpenToken { .. } => luks_dev.activate_token(
-                        }),
-                    Command::OpenToken { .. } => luks::open_container_token(
-                        &luks.device,
                         &name,
                         Box::new(|credentials: Vec<String>| {
                             let creds = credentials
@@ -516,6 +310,7 @@ pub fn run_cli() -> Fido2LuksResult<()> {
                             secret(Cow::Owned(creds))
                                 .map(|(secret, cred)| (secret, hex::encode(&cred.id)))
                         }),
+                        luks.slot,
                     ),
                     _ => unreachable!(),
                 };
@@ -531,7 +326,7 @@ pub fn run_cli() -> Fido2LuksResult<()> {
                         retries -= 1;
                         eprintln!("{}", e);
                     }
-                    res => break res,
+                    res => break res.map(|_| ()),
                 }
             }
         }
@@ -542,5 +337,141 @@ pub fn run_cli() -> Fido2LuksResult<()> {
             }
             _ => exit(1),
         },
+        Command::Token(cmd) => match cmd {
+            TokenCommand::List {
+                device,
+                csv: dump_credentials,
+            } => {
+                let mut dev = LuksDevice::load(device)?;
+                let mut creds = Vec::new();
+                for token in dev.tokens()? {
+                    let (id, token) = token?;
+                    for cred in token.credential.iter() {
+                        if !creds.contains(cred) {
+                            creds.push(cred.clone());
+                            if *dump_credentials {
+                                print!("{}{}", if creds.len() == 1 { "" } else { "," }, cred);
+                            }
+                        }
+                    }
+                    if *dump_credentials {
+                        continue;
+                    }
+                    println!(
+                        "{}:\n\tSlots: {}\n\tCredentials: {}",
+                        id,
+                        if token.keyslots.is_empty() {
+                            "None".into()
+                        } else {
+                            token.keyslots.iter().cloned().collect::<Vec<_>>().join(",")
+                        },
+                        token
+                            .credential
+                            .iter()
+                            .map(|cred| format!(
+                                "{} ({})",
+                                cred,
+                                creds.iter().position(|c| c == cred).unwrap().to_string()
+                            ))
+                            .collect::<Vec<_>>()
+                            .join(",")
+                    );
+                }
+                if *dump_credentials {
+                    println!();
+                }
+                Ok(())
+            }
+            TokenCommand::Add {
+                device,
+                credentials,
+                slot,
+            } => {
+                let mut dev = LuksDevice::load(device)?;
+                let mut tokens = Vec::new();
+                for token in dev.tokens()? {
+                    let (id, token) = token?;
+                    if token.keyslots.contains(&slot.to_string()) {
+                        tokens.push((id, token));
+                    }
+                }
+                let count = if tokens.is_empty() {
+                    dev.add_token(&Fido2LuksToken::with_credentials(&credentials.ids.0, *slot))?;
+                    1
+                } else {
+                    tokens.len()
+                };
+                for (id, mut token) in tokens {
+                    token
+                        .credential
+                        .extend(credentials.ids.0.iter().map(|h| h.to_string()));
+                    dev.update_token(id, &token)?;
+                }
+                println!("Updated {} tokens", count);
+                Ok(())
+            }
+            TokenCommand::Remove {
+                device,
+                credentials,
+                token_id,
+            } => {
+                let mut dev = LuksDevice::load(device)?;
+                let mut tokens = Vec::new();
+                for token in dev.tokens()? {
+                    let (id, token) = token?;
+                    if let Some(token_id) = token_id {
+                        if id == *token_id {
+                            tokens.push((id, token));
+                        }
+                    } else {
+                        tokens.push((id, token));
+                    }
+                }
+                let count = tokens.len();
+                for (id, mut token) in tokens {
+                    token.credential = token
+                        .credential
+                        .into_iter()
+                        .filter(|cred| !credentials.ids.0.iter().any(|h| &h.to_string() == cred))
+                        .collect();
+                    dev.update_token(id, &token)?;
+                }
+                println!("Updated {} tokens", count);
+                Ok(())
+            }
+            TokenCommand::GC { device } => {
+                let mut dev = LuksDevice::load(device)?;
+                let mut creds: HashSet<String> = HashSet::new();
+                let mut remove = Vec::new();
+                for token in dev.tokens()? {
+                    let (id, token) = token?;
+                    if token.keyslots.is_empty() || token.credential.is_empty() {
+                        creds.extend(token.credential);
+                        remove.push(id);
+                    }
+                }
+                for id in remove.iter().rev() {
+                    dev.remove_token(*id)?;
+                }
+                println!(
+                    "Removed {} tokens, affected credentials: {}",
+                    remove.len(),
+                    creds.into_iter().collect::<Vec<_>>().join(",")
+                );
+                Ok(())
+            }
+        },
+        Command::GenerateCompletions { shell, out_dir } => {
+            Args::clap().gen_completions(
+                env!("CARGO_PKG_NAME"),
+                match shell.as_ref() {
+                    "bash" => Shell::Bash,
+                    "fish" => Shell::Fish,
+                    _ => unreachable!("structopt shouldn't allow us to reach this point"),
+                },
+                &out_dir,
+            );
+            Ok(())
+        }
     }
 }

src/cli_args/config.rs

@@ -10,33 +10,33 @@ use std::process::Command;
 use std::str::FromStr;
 
 #[derive(Debug, Clone, PartialEq)]
-pub enum InputSalt {
+pub enum SecretInput {
     AskPassword,
     String(String),
     File { path: PathBuf },
 }
 
-impl Default for InputSalt {
+impl Default for SecretInput {
     fn default() -> Self {
-        InputSalt::AskPassword
+        SecretInput::AskPassword
     }
 }
 
-impl From<&str> for InputSalt {
+impl From<&str> for SecretInput {
     fn from(s: &str) -> Self {
         let mut parts = s.split(':');
         match parts.next() {
-            Some("ask") | Some("Ask") => InputSalt::AskPassword,
+            Some("ask") | Some("Ask") => SecretInput::AskPassword,
-            Some("file") => InputSalt::File {
+            Some("file") => SecretInput::File {
                 path: parts.collect::<Vec<_>>().join(":").into(),
             },
-            Some("string") => InputSalt::String(parts.collect::<Vec<_>>().join(":")),
+            Some("string") => SecretInput::String(parts.collect::<Vec<_>>().join(":")),
             _ => Self::default(),
         }
     }
 }
 
-impl FromStr for InputSalt {
+impl FromStr for SecretInput {
     type Err = Fido2LuksError;
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
@@ -44,21 +44,42 @@ impl FromStr for InputSalt {
     }
 }
 
-impl fmt::Display for InputSalt {
+impl fmt::Display for SecretInput {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
         f.write_str(&match self {
-            InputSalt::AskPassword => "ask".to_string(),
+            SecretInput::AskPassword => "ask".to_string(),
-            InputSalt::String(s) => ["string", s].join(":"),
+            SecretInput::String(s) => ["string", s].join(":"),
-            InputSalt::File { path } => ["file", path.display().to_string().as_str()].join(":"),
+            SecretInput::File { path } => ["file", path.display().to_string().as_str()].join(":"),
         })
     }
 }
 
-impl InputSalt {
+impl SecretInput {
-    pub fn obtain(&self, password_helper: &PasswordHelper) -> Fido2LuksResult<[u8; 32]> {
+    pub fn obtain_string(&self, password_helper: &PasswordHelper) -> Fido2LuksResult<String> {
+        Ok(String::from_utf8(self.obtain(password_helper)?)?)
+    }
+
+    pub fn obtain(&self, password_helper: &PasswordHelper) -> Fido2LuksResult<Vec<u8>> {
+        let mut secret = Vec::new();
+        match self {
+            SecretInput::File { path } => {
+                //TODO: replace with try_blocks
+                let mut do_io = || File::open(path)?.read_to_end(&mut secret);
+                do_io().map_err(|cause| Fido2LuksError::KeyfileError { cause })?;
+            }
+            SecretInput::AskPassword => {
+                secret.extend_from_slice(password_helper.obtain()?.as_bytes())
+            }
+
+            SecretInput::String(s) => secret.extend_from_slice(s.as_bytes()),
+        }
+        Ok(secret)
+    }
+
+    pub fn obtain_sha256(&self, password_helper: &PasswordHelper) -> Fido2LuksResult<[u8; 32]> {
         let mut digest = digest::Context::new(&digest::SHA256);
         match self {
-            InputSalt::File { path } => {
+            SecretInput::File { path } => {
                 let mut do_io = || {
                     let mut reader = File::open(path)?;
                     let mut buf = [0u8; 512];
@@ -73,10 +94,7 @@ impl InputSalt {
                 };
                 do_io().map_err(|cause| Fido2LuksError::KeyfileError { cause })?;
             }
-            InputSalt::AskPassword => {
+            _ => digest.update(self.obtain(password_helper)?.as_slice()),
-                digest.update(password_helper.obtain()?.as_bytes());
-            }
-            InputSalt::String(s) => digest.update(s.as_bytes()),
         }
         let mut salt = [0u8; 32];
         salt.as_mut().copy_from_slice(digest.finish().as_ref());
@@ -135,10 +153,9 @@ impl PasswordHelper {
             Systemd => unimplemented!(),
             Stdin => Ok(util::read_password("Password", true)?),
             Script(password_helper) => {
-                let mut helper_parts = password_helper.split(' ');
+                let password = Command::new("sh")
-
+                    .arg("-c")
-                let password = Command::new((&mut helper_parts).next().unwrap())
+                    .arg(&password_helper)
-                    .args(helper_parts)
                     .output()
                     .map_err(|e| Fido2LuksError::AskPassError {
                         cause: error::AskPassError::IO(e),
@@ -158,24 +175,30 @@ mod test {
     #[test]
     fn input_salt_from_str() {
         assert_eq!(
-            "file:/tmp/abc".parse::<InputSalt>().unwrap(),
+            "file:/tmp/abc".parse::<SecretInput>().unwrap(),
-            InputSalt::File {
+            SecretInput::File {
                 path: "/tmp/abc".into()
             }
         );
         assert_eq!(
-            "string:abc".parse::<InputSalt>().unwrap(),
+            "string:abc".parse::<SecretInput>().unwrap(),
-            InputSalt::String("abc".into())
+            SecretInput::String("abc".into())
+        );
+        assert_eq!(
+            "ask".parse::<SecretInput>().unwrap(),
+            SecretInput::AskPassword
+        );
+        assert_eq!(
+            "lol".parse::<SecretInput>().unwrap(),
+            SecretInput::default()
         );
-        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())
+            SecretInput::String("abc".into())
-                .obtain(&PasswordHelper::Stdin)
+                .obtain_sha256(&PasswordHelper::Stdin)
                 .unwrap(),
             [
                 186, 120, 22, 191, 143, 1, 207, 234, 65, 65, 64, 222, 93, 174, 34, 35, 176, 3, 97,

src/cli_args/mod.rs

@@ -0,0 +1,293 @@
+use std::fmt::{Display, Error, Formatter};
+use std::path::PathBuf;
+use std::str::FromStr;
+use structopt::clap::AppSettings;
+use structopt::StructOpt;
+
+mod config;
+
+pub use config::*;
+
+#[derive(Debug, Eq, PartialEq, Clone)]
+pub struct HexEncoded(pub Vec<u8>);
+
+impl Display for HexEncoded {
+    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error> {
+        f.write_str(&hex::encode(&self.0))
+    }
+}
+
+impl AsRef<[u8]> for HexEncoded {
+    fn as_ref(&self) -> &[u8] {
+        &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, Eq, PartialEq, Clone)]
+pub struct CommaSeparated<T: FromStr + Display>(pub Vec<T>);
+
+impl<T: Display + FromStr> Display for CommaSeparated<T> {
+    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error> {
+        for i in &self.0 {
+            f.write_str(&i.to_string())?;
+            f.write_str(",")?;
+        }
+        Ok(())
+    }
+}
+
+impl<T: Display + FromStr> FromStr for CommaSeparated<T> {
+    type Err = <T as FromStr>::Err;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(CommaSeparated(
+            s.split(',')
+                .map(|part| <T as FromStr>::from_str(part))
+                .collect::<Result<Vec<_>, _>>()?,
+        ))
+    }
+}
+
+#[derive(Debug, StructOpt)]
+pub struct Credentials {
+    /// FIDO credential ids, separated by ',' generate using fido2luks credential
+    #[structopt(name = "credential-id", env = "FIDO2LUKS_CREDENTIAL_ID")]
+    pub ids: CommaSeparated<HexEncoded>,
+}
+
+#[derive(Debug, StructOpt)]
+pub struct AuthenticatorParameters {
+    /// Request a PIN to unlock the authenticator
+    #[structopt(short = "P", long = "pin")]
+    pub pin: bool,
+
+    /// Location to read PIN from
+    #[structopt(long = "pin-source", env = "FIDO2LUKS_PIN_SOURCE")]
+    pub pin_source: Option<PathBuf>,
+
+    /// 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_time: u64,
+}
+
+#[derive(Debug, StructOpt)]
+pub struct LuksParameters {
+    #[structopt(env = "FIDO2LUKS_DEVICE")]
+    pub device: PathBuf,
+
+    /// Try to unlock the device using a specifc keyslot, ignore all other slots
+    #[structopt(long = "slot", env = "FIDO2LUKS_DEVICE_SLOT")]
+    pub slot: Option<u32>,
+}
+
+#[derive(Debug, StructOpt, Clone)]
+pub struct LuksModParameters {
+    /// Number of milliseconds required to derive the volume decryption key
+    /// Defaults to 10ms when using an authenticator or the default by cryptsetup when using a password
+    #[structopt(long = "kdf-time", name = "kdf-time")]
+    pub kdf_time: Option<u64>,
+}
+
+#[derive(Debug, StructOpt)]
+pub struct SecretParameters {
+    /// 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: SecretInput,
+    /// Script used to obtain passwords, overridden by --interactive flag
+    #[structopt(
+        name = "password-helper",
+        env = "FIDO2LUKS_PASSWORD_HELPER",
+        default_value = "/usr/bin/env systemd-ask-password 'Please enter second factor for LUKS disk encryption!'"
+    )]
+    pub password_helper: PasswordHelper,
+}
+#[derive(Debug, StructOpt)]
+pub struct Args {
+    /// Request passwords via Stdin instead of using the password helper
+    #[structopt(short = "i", long = "interactive")]
+    pub interactive: bool,
+    #[structopt(subcommand)]
+    pub command: Command,
+}
+
+#[derive(Debug, StructOpt, Clone)]
+pub struct OtherSecret {
+    /// Use a keyfile instead of a password
+    #[structopt(short = "d", long = "keyfile", conflicts_with = "fido_device")]
+    pub keyfile: Option<PathBuf>,
+    /// Use another fido device instead of a password
+    /// Note: this requires for the credential fot the other device to be passed as argument as well
+    #[structopt(short = "f", long = "fido-device", conflicts_with = "keyfile")]
+    pub fido_device: bool,
+}
+
+#[derive(Debug, StructOpt)]
+pub enum Command {
+    #[structopt(name = "print-secret")]
+    PrintSecret {
+        /// Prints the secret as binary instead of hex encoded
+        #[structopt(short = "b", long = "bin")]
+        binary: bool,
+        #[structopt(flatten)]
+        credentials: Credentials,
+        #[structopt(flatten)]
+        authenticator: AuthenticatorParameters,
+        #[structopt(flatten)]
+        secret: SecretParameters,
+    },
+    /// Adds a generated key to the specified LUKS device
+    #[structopt(name = "add-key")]
+    AddKey {
+        #[structopt(flatten)]
+        luks: LuksParameters,
+        #[structopt(flatten)]
+        credentials: Credentials,
+        #[structopt(flatten)]
+        authenticator: AuthenticatorParameters,
+        #[structopt(flatten)]
+        secret: SecretParameters,
+        /// Will wipe all other keys
+        #[structopt(short = "e", long = "exclusive")]
+        exclusive: bool,
+        /// Will add an token to your LUKS 2 header, including the credential id
+        #[structopt(short = "t", long = "token")]
+        token: bool,
+        #[structopt(flatten)]
+        existing_secret: OtherSecret,
+        #[structopt(flatten)]
+        luks_mod: LuksModParameters,
+    },
+    /// Replace a previously added key with a password
+    #[structopt(name = "replace-key")]
+    ReplaceKey {
+        #[structopt(flatten)]
+        luks: LuksParameters,
+        #[structopt(flatten)]
+        credentials: Credentials,
+        #[structopt(flatten)]
+        authenticator: AuthenticatorParameters,
+        #[structopt(flatten)]
+        secret: SecretParameters,
+        /// Add the password and keep the key
+        #[structopt(short = "a", long = "add-password")]
+        add_password: bool,
+        /// Will add an token to your LUKS 2 header, including the credential id
+        #[structopt(short = "t", long = "token")]
+        token: bool,
+        #[structopt(flatten)]
+        replacement: OtherSecret,
+        #[structopt(flatten)]
+        luks_mod: LuksModParameters,
+    },
+    /// Open the LUKS device
+    #[structopt(name = "open")]
+    Open {
+        #[structopt(flatten)]
+        luks: LuksParameters,
+        #[structopt(env = "FIDO2LUKS_MAPPER_NAME")]
+        name: String,
+        #[structopt(flatten)]
+        credentials: Credentials,
+        #[structopt(flatten)]
+        authenticator: AuthenticatorParameters,
+        #[structopt(flatten)]
+        secret: SecretParameters,
+        #[structopt(short = "r", long = "max-retries", default_value = "0")]
+        retries: i32,
+    },
+    /// Open the LUKS device using credentials embedded in the LUKS 2 header
+    #[structopt(name = "open-token")]
+    OpenToken {
+        #[structopt(flatten)]
+        luks: LuksParameters,
+        #[structopt(env = "FIDO2LUKS_MAPPER_NAME")]
+        name: String,
+        #[structopt(flatten)]
+        authenticator: AuthenticatorParameters,
+        #[structopt(flatten)]
+        secret: SecretParameters,
+        #[structopt(short = "r", long = "max-retries", default_value = "0")]
+        retries: i32,
+    },
+    /// Generate a new FIDO credential
+    #[structopt(name = "credential")]
+    Credential {
+        #[structopt(flatten)]
+        authenticator: AuthenticatorParameters,
+        /// 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,
+    Token(TokenCommand),
+    /// Generate bash completion scripts
+    #[structopt(name = "completions", setting = AppSettings::Hidden)]
+    GenerateCompletions {
+        /// Shell to generate completions for: bash, fish
+        #[structopt(possible_values = &["bash", "fish"])]
+        shell: String,
+        out_dir: PathBuf,
+    },
+}
+
+///LUKS2 token related operations
+#[derive(Debug, StructOpt)]
+pub enum TokenCommand {
+    /// List all tokens associated with the specified device
+    List {
+        #[structopt(env = "FIDO2LUKS_DEVICE")]
+        device: PathBuf,
+        /// Dump all credentials as CSV
+        #[structopt(long = "csv")]
+        csv: bool,
+    },
+    /// Add credential to a keyslot
+    Add {
+        #[structopt(env = "FIDO2LUKS_DEVICE")]
+        device: PathBuf,
+        #[structopt(flatten)]
+        credentials: Credentials,
+        /// Slot to which the credentials will be added
+        #[structopt(long = "slot", env = "FIDO2LUKS_DEVICE_SLOT")]
+        slot: u32,
+    },
+    /// Remove credentials from token(s)
+    Remove {
+        #[structopt(env = "FIDO2LUKS_DEVICE")]
+        device: PathBuf,
+        #[structopt(flatten)]
+        credentials: Credentials,
+        /// Token from which the credentials will be removed
+        #[structopt(long = "token")]
+        token_id: Option<u32>,
+    },
+    /// Remove all unassigned tokens
+    GC {
+        #[structopt(env = "FIDO2LUKS_DEVICE")]
+        device: PathBuf,
+    },
+}

src/error.rs

@@ -1,5 +1,9 @@
 use ctap::FidoError;
+use libcryptsetup_rs::LibcryptErr;
 use std::io;
+use std::io::ErrorKind;
+use std::string::FromUtf8Error;
+use Fido2LuksError::*;
 
 pub type Fido2LuksResult<T> = Result<T, Fido2LuksError>;
 
@@ -75,10 +79,11 @@ impl LuksError {
     }
 }
 
-use libcryptsetup_rs::LibcryptErr;
+impl From<LuksError> for Fido2LuksError {
-use std::io::ErrorKind;
+    fn from(e: LuksError) -> Self {
-use std::string::FromUtf8Error;
+        Fido2LuksError::LuksError { cause: e }
-use Fido2LuksError::*;
+    }
+}
 
 impl From<FidoError> for Fido2LuksError {
     fn from(e: FidoError) -> Self {

src/luks.rs

@@ -7,235 +7,321 @@ use libcryptsetup_rs::{
 use std::collections::{HashMap, HashSet};
 use std::path::Path;
 
-fn load_device_handle<P: AsRef<Path>>(path: P) -> Fido2LuksResult<CryptDevice> {
+pub struct LuksDevice {
-    let mut device = CryptInit::init(path.as_ref())?;
+    device: CryptDevice,
-    device.context_handle().load::<()>(None, None)?;
+    luks2: Option<bool>,
-    Ok(device)
 }
 
-fn check_luks2(device: &mut CryptDevice) -> Fido2LuksResult<()> {
+impl LuksDevice {
-    match device.format_handle().get_type()? {
+    pub fn load<P: AsRef<Path>>(path: P) -> Fido2LuksResult<LuksDevice> {
-        EncryptionFormat::Luks2 => Ok(()),
+        let mut device = CryptInit::init(path.as_ref())?;
-        _ => Err(Fido2LuksError::LuksError {
+        device.context_handle().load::<()>(None, None)?;
-            cause: LuksError::Luks2Required,
+        Ok(Self {
-        }),
+            device,
+            luks2: None,
+        })
+    }
+
+    pub fn is_luks2(&mut self) -> Fido2LuksResult<bool> {
+        if let Some(luks2) = self.luks2 {
+            Ok(luks2)
+        } else {
+            self.luks2 = Some(match self.device.format_handle().get_type()? {
+                EncryptionFormat::Luks2 => true,
+                _ => false,
+            });
+            self.is_luks2()
+        }
+    }
+
+    fn require_luks2(&mut self) -> Fido2LuksResult<()> {
+        if !self.is_luks2()? {
+            return Err(LuksError::Luks2Required.into());
+        }
+        Ok(())
+    }
+
+    pub fn tokens<'a>(
+        &'a mut self,
+    ) -> Fido2LuksResult<Box<dyn Iterator<Item = Fido2LuksResult<(u32, Fido2LuksToken)>> + 'a>>
+    {
+        self.require_luks2()?;
+        Ok(Box::new(
+            (0..32)
+                .map(move |i| {
+                    let status = match self.device.token_handle().status(i) {
+                        Ok(status) => status,
+                        Err(err) => return Some(Err(Fido2LuksError::from(err))),
+                    };
+                    match status {
+                        CryptTokenInfo::Inactive => return None,
+                        CryptTokenInfo::Internal(s)
+                        | CryptTokenInfo::InternalUnknown(s)
+                        | CryptTokenInfo::ExternalUnknown(s)
+                        | CryptTokenInfo::External(s)
+                            if &s != Fido2LuksToken::default_type() =>
+                        {
+                            return None
+                        }
+                        _ => (),
+                    };
+                    let json = match self.device.token_handle().json_get(i) {
+                        Ok(json) => json,
+                        Err(err) => return Some(Err(Fido2LuksError::from(err))),
+                    };
+                    let info: Fido2LuksToken =
+                        match serde_json::from_value(json.clone()).map_err(|_| {
+                            Fido2LuksError::LuksError {
+                                cause: LuksError::InvalidToken(json.to_string()),
+                            }
+                        }) {
+                            Ok(info) => info,
+                            Err(err) => return Some(Err(Fido2LuksError::from(err))),
+                        };
+                    Some(Ok((i, info)))
+                })
+                .filter_map(|o| o),
+        ))
+    }
+
+    pub fn find_token(&mut self, slot: u32) -> Fido2LuksResult<Option<(u32, Fido2LuksToken)>> {
+        let slot_str = slot.to_string();
+        for token in self.tokens()? {
+            let (id, token) = token?;
+            if token.keyslots.contains(&slot_str) {
+                return Ok(Some((id, token)));
+            }
+        }
+        Ok(None)
+    }
+
+    pub fn add_token(&mut self, data: &Fido2LuksToken) -> Fido2LuksResult<()> {
+        self.require_luks2()?;
+        self.device
+            .token_handle()
+            .json_set(TokenInput::AddToken(&serde_json::to_value(&data).unwrap()))?;
+        Ok(())
+    }
+
+    pub fn remove_token(&mut self, token: u32) -> Fido2LuksResult<()> {
+        self.require_luks2()?;
+        self.device
+            .token_handle()
+            .json_set(TokenInput::RemoveToken(token))?;
+        Ok(())
+    }
+
+    pub fn update_token(&mut self, token: u32, data: &Fido2LuksToken) -> Fido2LuksResult<()> {
+        self.require_luks2()?;
+        self.device
+            .token_handle()
+            .json_set(TokenInput::ReplaceToken(
+                token,
+                &serde_json::to_value(&data).unwrap(),
+            ))?;
+        Ok(())
+    }
+
+    pub fn add_key(
+        &mut self,
+        secret: &[u8],
+        old_secret: &[u8],
+        iteration_time: Option<u64>,
+        credential_id: Option<&[u8]>,
+    ) -> Fido2LuksResult<u32> {
+        if let Some(millis) = iteration_time {
+            self.device.settings_handle().set_iteration_time(millis)
+        }
+        let slot = self
+            .device
+            .keyslot_handle()
+            .add_by_passphrase(None, old_secret, secret)?;
+        if let Some(id) = credential_id {
+            self.device.token_handle().json_set(TokenInput::AddToken(
+                &serde_json::to_value(&Fido2LuksToken::new(id, slot)).unwrap(),
+            ))?;
+        }
+
+        Ok(slot)
+    }
+
+    pub fn remove_keyslots(&mut self, exclude: &[u32]) -> Fido2LuksResult<u32> {
+        let mut destroyed = 0;
+        let mut tokens = Vec::new();
+        for slot in 0..256 {
+            match self.device.keyslot_handle().status(slot)? {
+                KeyslotInfo::Inactive => continue,
+                KeyslotInfo::Active | KeyslotInfo::ActiveLast if !exclude.contains(&slot) => {
+                    if self.is_luks2()? {
+                        if let Some((id, _token)) = self.find_token(slot)? {
+                            tokens.push(id);
+                        }
+                    }
+                    self.device.keyslot_handle().destroy(slot)?;
+                    destroyed += 1;
+                }
+                KeyslotInfo::ActiveLast => break,
+                _ => (),
+            }
+            if self.device.keyslot_handle().status(slot)? == KeyslotInfo::ActiveLast {
+                break;
+            }
+        }
+        // Ensure indices stay valid
+        tokens.sort();
+        for token in tokens.iter().rev() {
+            self.remove_token(*token)?;
+        }
+        Ok(destroyed)
+    }
+
+    pub fn replace_key(
+        &mut self,
+        secret: &[u8],
+        old_secret: &[u8],
+        iteration_time: Option<u64>,
+        credential_id: Option<&[u8]>,
+    ) -> Fido2LuksResult<u32> {
+        if let Some(millis) = iteration_time {
+            self.device.settings_handle().set_iteration_time(millis)
+        }
+        // Use activate dry-run to locate keyslot
+        let slot = self.device.activate_handle().activate_by_passphrase(
+            None,
+            None,
+            old_secret,
+            CryptActivateFlags::empty(),
+        )?;
+        self.device.keyslot_handle().change_by_passphrase(
+            Some(slot),
+            Some(slot),
+            old_secret,
+            secret,
+        )? as u32;
+        if let Some(id) = credential_id {
+            if self.is_luks2()? {
+                let token = self.find_token(slot)?.map(|(t, _)| t);
+                let json = serde_json::to_value(&Fido2LuksToken::new(id, slot)).unwrap();
+                if let Some(token) = token {
+                    self.device
+                        .token_handle()
+                        .json_set(TokenInput::ReplaceToken(token, &json))?;
+                } else {
+                    self.device
+                        .token_handle()
+                        .json_set(TokenInput::AddToken(&json))?;
+                }
+            }
+        }
+        Ok(slot)
+    }
+
+    pub fn activate(
+        &mut self,
+        name: &str,
+        secret: &[u8],
+        slot_hint: Option<u32>,
+    ) -> Fido2LuksResult<u32> {
+        self.device
+            .activate_handle()
+            .activate_by_passphrase(Some(name), slot_hint, secret, CryptActivateFlags::empty())
+            .map_err(LuksError::activate)
+    }
+
+    pub fn activate_token(
+        &mut self,
+        name: &str,
+        secret: impl Fn(Vec<String>) -> Fido2LuksResult<([u8; 32], String)>,
+        slot_hint: Option<u32>,
+    ) -> Fido2LuksResult<u32> {
+        if !self.is_luks2()? {
+            return Err(LuksError::Luks2Required.into());
+        }
+        let mut creds: HashMap<String, HashSet<u32>> = HashMap::new();
+        for token in self.tokens()? {
+            let token = match token {
+                Ok((_id, t)) => t,
+                _ => continue, // An corrupted token should't lock the user out
+            };
+            let slots = || {
+                token
+                    .keyslots
+                    .iter()
+                    .filter_map(|slot| slot.parse::<u32>().ok())
+            };
+            for cred in token.credential.iter() {
+                creds
+                    .entry(cred.clone())
+                    .or_insert_with(|| slots().collect::<HashSet<u32>>())
+                    .extend(slots());
+            }
+        }
+        if creds.is_empty() {
+            return Err(Fido2LuksError::LuksError {
+                cause: LuksError::NoToken,
+            });
+        }
+        let (secret, credential) = secret(creds.keys().cloned().collect())?;
+        let empty;
+        let slots = if let Some(slots) = creds.get(&credential) {
+            slots
+        } else {
+            empty = HashSet::new();
+            &empty
+        };
+        //Try slots associated with the credential used
+        let slots = slots.iter().cloned().map(Option::Some).chain(
+            std::iter::once(slot_hint) // Try slot hint if there is one
+                .take(slot_hint.is_some() as usize)
+                .chain(std::iter::once(None).take(slots.is_empty() as usize)), // Try all slots as last resort
+        );
+        for slot in slots {
+            match self.activate(name, &secret, slot) {
+                Err(Fido2LuksError::WrongSecret) => (),
+                res => return res,
+            }
+        }
+        Err(Fido2LuksError::WrongSecret)
     }
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
-struct Fido2LuksToken {
+pub struct Fido2LuksToken {
     #[serde(rename = "type")]
-    type_: String,
+    pub type_: String,
-    credential: Vec<String>,
+    pub credential: HashSet<String>,
-    keyslots: Vec<String>,
+    pub keyslots: HashSet<String>,
 }
 
 impl Fido2LuksToken {
-    fn new(credential_id: impl AsRef<[u8]>, slot: u32) -> Self {
+    pub fn new(credential_id: impl AsRef<[u8]>, slot: u32) -> Self {
+        Self::with_credentials(std::iter::once(credential_id), slot)
+    }
+
+    pub fn with_credentials<I: IntoIterator<Item = B>, B: AsRef<[u8]>>(
+        credentials: I,
+        slot: u32,
+    ) -> Self {
         Self {
-            type_: "fido2luks\0".into(), // Doubles as c style string
+            credential: credentials
-            credential: vec![hex::encode(credential_id)],
+                .into_iter()
-            keyslots: vec![slot.to_string()],
+                .map(|cred| hex::encode(cred.as_ref()))
+                .collect(),
+            keyslots: vec![slot.to_string()].into_iter().collect(),
+            ..Default::default()
         }
     }
+    pub fn default_type() -> &'static str {
+        "fido2luks"
+    }
 }
 
-pub fn open_container<P: AsRef<Path>>(
+impl Default for Fido2LuksToken {
-    path: P,
+    fn default() -> Self {
-    name: &str,
+        Self {
-    secret: &[u8],
+            type_: Self::default_type().into(),
-    slot_hint: Option<u32>,
+            credential: HashSet::new(),
-) -> Fido2LuksResult<()> {
+            keyslots: HashSet::new(),
-    let mut device = load_device_handle(path)?;
-    device
-        .activate_handle()
-        .activate_by_passphrase(Some(name), slot_hint, secret, CryptActivateFlags::empty())
-        .map(|_slot| ())
-        .map_err(|_e| Fido2LuksError::WrongSecret)
-}
-
-pub fn open_container_token<P: AsRef<Path>>(
-    path: P,
-    name: &str,
-    secret: impl Fn(Vec<String>) -> Fido2LuksResult<([u8; 32], String)>,
-) -> Fido2LuksResult<()> {
-    let mut device = load_device_handle(path)?;
-    check_luks2(&mut device)?;
-
-    let mut creds = HashMap::new();
-    for i in 0..256 {
-        let status = device.token_handle().status(i)?;
-        match status {
-            CryptTokenInfo::Inactive => break,
-            CryptTokenInfo::Internal(s)
-            | CryptTokenInfo::InternalUnknown(s)
-            | CryptTokenInfo::ExternalUnknown(s)
-            | CryptTokenInfo::External(s)
-                if &s != "fido2luks" =>
-            {
-                continue
-            }
-            _ => (),
-        };
-        let json = device.token_handle().json_get(i)?;
-        let info: Fido2LuksToken =
-            serde_json::from_value(json.clone()).map_err(|_| Fido2LuksError::LuksError {
-                cause: LuksError::InvalidToken(json.to_string()),
-            })?;
-        let slots = || {
-            info.keyslots
-                .iter()
-                .filter_map(|slot| slot.parse::<u32>().ok())
-        };
-        for cred in info.credential.iter().cloned() {
-            creds
-                .entry(cred)
-                .or_insert_with(|| slots().collect::<HashSet<u32>>())
-                .extend(slots());
         }
     }
-    if creds.is_empty() {
-        return Err(Fido2LuksError::LuksError {
-            cause: LuksError::NoToken,
-        });
-    }
-    let (secret, credential) = secret(creds.keys().cloned().collect())?;
-    let slots = creds.get(&credential).unwrap();
-    let slots = slots
-        .iter()
-        .cloned()
-        .map(Option::Some)
-        .chain(std::iter::once(None).take(slots.is_empty() as usize));
-    for slot in slots {
-        match device
-            .activate_handle()
-            .activate_by_passphrase(Some(name), slot, &secret, CryptActivateFlags::empty())
-            .map(|_slot| ())
-            .map_err(LuksError::activate)
-        {
-            Err(Fido2LuksError::WrongSecret) => (),
-            res => return res,
-        }
-    }
-    Err(Fido2LuksError::WrongSecret)
-}
-
-pub fn add_key<P: AsRef<Path>>(
-    path: P,
-    secret: &[u8],
-    old_secret: &[u8],
-    iteration_time: Option<u64>,
-    credential_id: Option<&[u8]>,
-) -> Fido2LuksResult<u32> {
-    let mut device = load_device_handle(path)?;
-    if let Some(millis) = iteration_time {
-        device.settings_handle().set_iteration_time(millis)
-    }
-    let slot = device
-        .keyslot_handle()
-        .add_by_passphrase(None, old_secret, secret)?;
-    if let Some(id) = credential_id {
-        /*  if let e @ Err(_) = check_luks2(&mut device) {
-            //rollback
-            device.keyslot_handle(Some(slot)).destroy()?;
-            return e.map(|_| 0u32);
-        }*/
-        device.token_handle().json_set(TokenInput::AddToken(
-            &serde_json::to_value(&Fido2LuksToken::new(id, slot)).unwrap(),
-        ))?;
-    }
-
-    Ok(slot)
-}
-
-fn find_token(
-    device: &mut CryptDevice,
-    slot: u32,
-) -> Fido2LuksResult<Option<(u32, Fido2LuksToken)>> {
-    for i in 0..256 {
-        let status = device.token_handle().status(i)?;
-        match status {
-            CryptTokenInfo::Inactive => break,
-            CryptTokenInfo::Internal(s)
-            | CryptTokenInfo::InternalUnknown(s)
-            | CryptTokenInfo::ExternalUnknown(s)
-            | CryptTokenInfo::External(s)
-                if &s != "fido2luks" =>
-            {
-                continue
-            }
-            _ => (),
-        };
-        let json = device.token_handle().json_get(i)?;
-        let info: Fido2LuksToken =
-            serde_json::from_value(json.clone()).map_err(|_| Fido2LuksError::LuksError {
-                cause: LuksError::InvalidToken(json.to_string()),
-            })?;
-        if info.keyslots.contains(&slot.to_string()) {
-            return Ok(Some((i, info)));
-        }
-    }
-    Ok(None)
-}
-
-pub fn remove_keyslots<P: AsRef<Path>>(path: P, exclude: &[u32]) -> Fido2LuksResult<u32> {
-    let mut device = load_device_handle(path)?;
-    let mut destroyed = 0;
-    let mut tokens = Vec::new();
-    for slot in 0..256 {
-        match device.keyslot_handle().status(slot)? {
-            KeyslotInfo::Inactive => continue,
-            KeyslotInfo::Active | KeyslotInfo::ActiveLast if !exclude.contains(&slot) => {
-                if let Ok(_) = check_luks2(&mut device) {
-                    if let Some((token, _)) = find_token(&mut device, slot)? {
-                        tokens.push(token);
-                    }
-                }
-                device.keyslot_handle().destroy(slot)?;
-                destroyed += 1;
-            }
-            KeyslotInfo::ActiveLast => break,
-            _ => (),
-        }
-        if device.keyslot_handle().status(slot)? == KeyslotInfo::ActiveLast {
-            break;
-        }
-    }
-    // Ensure indices stay valid
-    tokens.sort();
-    for token in tokens.iter().rev() {
-        device
-            .token_handle()
-            .json_set(TokenInput::RemoveToken(*token))?;
-    }
-    Ok(destroyed)
-}
-
-pub fn replace_key<P: AsRef<Path>>(
-    path: P,
-    secret: &[u8],
-    old_secret: &[u8],
-    iteration_time: Option<u64>,
-    credential_id: Option<&[u8]>,
-) -> Fido2LuksResult<u32> {
-    let mut device = load_device_handle(path)?;
-    // Set iteration time not sure wether this applies to luks2 as well
-    if let Some(millis) = iteration_time {
-        device.settings_handle().set_iteration_time(millis)
-    }
-    let slot = device
-        .keyslot_handle()
-        .change_by_passphrase(None, None, old_secret, secret)? as u32;
-    if let Some(id) = credential_id {
-        if check_luks2(&mut device).is_ok() {
-            let token = find_token(&mut device, slot)?.map(|(t, _)| t);
-            if let Some(token) = token {
-                device.token_handle().json_set(TokenInput::ReplaceToken(
-                    token,
-                    &serde_json::to_value(&Fido2LuksToken::new(id, slot)).unwrap(),
-                ))?;
-            }
-        }
-    }
-    Ok(slot)
 }

src/main.rs

@@ -4,15 +4,13 @@ extern crate ctap_hmac as ctap;
 #[macro_use]
 extern crate serde_derive;
 use crate::cli::*;
-use crate::config::*;
 use crate::device::*;
 use crate::error::*;
 use std::io;
-use std::path::PathBuf;
 use std::process::exit;
 
 mod cli;
-mod config;
+pub mod cli_args;
 mod device;
 mod error;
 mod luks;
@@ -21,10 +19,7 @@ mod util;
 fn main() -> Fido2LuksResult<()> {
     match run_cli() {
         Err(e) => {
-            #[cfg(debug_assertions)]
             eprintln!("{:?}", e);
-            #[cfg(not(debug_assertions))]
-            eprintln!("{}", e);
             exit(e.exit_code())
         }
         _ => exit(0),