From c99d7f562d06ebd740bae9bd8413ccdb42face33 Mon Sep 17 00:00:00 2001
From: shimun <shimun@shimun.net>
Date: Fri, 27 Mar 2020 20:08:54 +0100
Subject: [PATCH] support luks2

---
 Cargo.lock   | 547 ++++++++++++++++++++++++++++++++++++---------------
 Cargo.toml   |   5 +-
 src/cli.rs   | 127 ++++--------
 src/error.rs |  14 +-
 src/luks.rs  |  84 ++++++++
 src/main.rs  |  10 +-
 6 files changed, 519 insertions(+), 268 deletions(-)
 create mode 100644 src/luks.rs

diff --git a/Cargo.lock b/Cargo.lock
index b3ca86a..5652ed0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,13 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "aho-corasick"
+version = "0.7.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "memchr 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "ansi_term"
 version = "0.11.0"
@@ -10,55 +18,75 @@ dependencies = [
 
 [[package]]
 name = "atty"
-version = "0.2.13"
+version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hermit-abi 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "autocfg"
-version = "0.1.6"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "autocfg"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "backtrace"
-version = "0.3.38"
+version = "0.3.46"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace-sys 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace-sys 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "backtrace-sys"
-version = "0.1.31"
+version = "0.1.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.45 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "bindgen"
+version = "0.53.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cexpr 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clang-sys 0.29.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "env_logger 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazycell 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "peeking_take_while 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-hash 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "shlex 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "which 3.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "bitflags"
-version = "1.2.0"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "blkid-rs"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "uuid 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "byteorder"
-version = "1.3.2"
+version = "1.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -66,31 +94,49 @@ name = "cbor-codec"
 version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "cc"
-version = "1.0.45"
+version = "1.0.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "cexpr"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "nom 5.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "cfg-if"
 version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "clang-sys"
+version = "0.29.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "glob 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libloading 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "clap"
 version = "2.33.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "atty 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atty 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-width 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -99,28 +145,15 @@ name = "cloudabi"
 version = "0.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "cryptsetup-rs"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "blkid-rs 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "errno 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
- "libcryptsetup-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "uuid 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "csv-core"
-version = "0.1.6"
+version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -128,14 +161,14 @@ name = "ctap_hmac"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "cbor-codec 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "csv-core 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "hex 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "csv-core 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure_derive 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hex 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-derive 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "ring 0.13.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rust-crypto 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -143,56 +176,53 @@ dependencies = [
 ]
 
 [[package]]
-name = "errno"
-version = "0.2.4"
+name = "either"
+version = "1.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "errno-dragonfly 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
-name = "errno-dragonfly"
-version = "0.1.1"
+name = "env_logger"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "gcc 0.3.55 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atty 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "humantime 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "termcolor 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "failure"
-version = "0.1.5"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace 0.3.38 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace 0.3.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure_derive 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "failure_derive"
-version = "0.1.5"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)",
- "synstructure 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "synstructure 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "fido2luks"
-version = "0.2.3"
+version = "0.2.4"
 dependencies = [
- "cryptsetup-rs 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "ctap_hmac 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libcryptsetup-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libcryptsetup-rs 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ring 0.13.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "rpassword 4.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "structopt 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rpassword 4.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt 0.3.12 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -205,12 +235,25 @@ name = "gcc"
 version = "0.3.55"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "glob"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "heck"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "unicode-segmentation 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-segmentation 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "hermit-abi"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -220,7 +263,20 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "hex"
-version = "0.4.0"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "humantime"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "quick-error 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "itoa"
+version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -229,17 +285,45 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "libc"
-version = "0.2.62"
+name = "lazycell"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "libcryptsetup-sys"
-version = "0.1.2"
+name = "libc"
+version = "0.2.68"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "libcryptsetup-rs"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
- "pkg-config 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
+ "either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libcryptsetup-rs-sys 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.48 (registry+https://github.com/rust-lang/crates.io-index)",
+ "uuid 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "libcryptsetup-rs-sys"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bindgen 0.53.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.17 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "libloading"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -252,10 +336,16 @@ dependencies = [
 
 [[package]]
 name = "memchr"
-version = "2.2.1"
+version = "2.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "nom"
+version = "5.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "version_check 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -270,25 +360,44 @@ dependencies = [
 
 [[package]]
 name = "num-traits"
-version = "0.2.8"
+version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "peeking_take_while"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "pkg-config"
-version = "0.3.16"
+version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "proc-macro-error"
-version = "0.2.6"
+version = "0.4.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-error-attr 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "version_check 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "proc-macro-error-attr"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn-mid 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "version_check 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -301,12 +410,17 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.5"
+version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "quick-error"
+version = "1.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "quote"
 version = "0.6.13"
@@ -317,10 +431,10 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "1.0.2"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -328,7 +442,7 @@ name = "rand"
 version = "0.3.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -338,7 +452,7 @@ version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -349,8 +463,8 @@ name = "rand"
 version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_chacha 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_hc 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -367,7 +481,7 @@ name = "rand_chacha"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -405,7 +519,7 @@ name = "rand_jitter"
 version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -417,7 +531,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -428,7 +542,7 @@ name = "rand_pcg"
 version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -453,23 +567,39 @@ name = "redox_syscall"
 version = "0.1.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "regex"
+version = "1.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "aho-corasick 0.7.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.6.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thread_local 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "ring"
 version = "0.13.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
  "untrusted 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rpassword"
-version = "4.0.1"
+version = "4.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -479,7 +609,7 @@ version = "0.2.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "gcc 0.3.55 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -490,11 +620,41 @@ name = "rustc-demangle"
 version = "0.1.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "rustc-hash"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "rustc-serialize"
 version = "0.3.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "ryu"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "serde"
+version = "1.0.105"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "serde_json"
+version = "1.0.48"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "itoa 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ryu 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.105 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "shlex"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "strsim"
 version = "0.8.0"
@@ -502,23 +662,24 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "structopt"
-version = "0.3.2"
+version = "0.3.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "structopt-derive 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt-derive 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "structopt-derive"
-version = "0.3.2"
+version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro-error 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-error 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -533,23 +694,41 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.5"
+version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "synstructure"
-version = "0.10.2"
+name = "syn-mid"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
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- "syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "synstructure"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "termcolor"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -557,7 +736,15 @@ name = "textwrap"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "unicode-width 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "thread_local"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -565,19 +752,19 @@ name = "time"
 version = "0.1.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "unicode-segmentation"
-version = "1.3.0"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "unicode-width"
-version = "0.1.6"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -608,6 +795,19 @@ name = "vec_map"
 version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "version_check"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "which"
+version = "3.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.68 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "winapi"
 version = "0.3.8"
@@ -622,50 +822,72 @@ name = "winapi-i686-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "winapi-util"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
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@@ -680,26 +902,39 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/Cargo.toml b/Cargo.toml
index be966b8..edd81da 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "fido2luks"
-version = "0.2.3"
+version = "0.2.4"
 authors = ["shimunn <shimun@shimun.net>"]
 edition = "2018"
 
@@ -15,8 +15,6 @@ license-file = "LICENSE"
 
 [dependencies]
 ctap_hmac = "0.2.1"
-cryptsetup-rs = "0.2.1"
-libcryptsetup-sys = "0.1.2"
 
 
 hex = "0.3.2"
@@ -24,6 +22,7 @@ ring = "0.13.5"
 failure = "0.1.5"
 rpassword = "4.0.1"
 structopt = "0.3.2"
+libcryptsetup-rs = "0.2.0"
 
 [profile.release]
 lto = true
diff --git a/src/cli.rs b/src/cli.rs
index f5bba4d..c467d08 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -1,11 +1,7 @@
 use crate::error::*;
+use crate::luks;
 use crate::*;
 
-use cryptsetup_rs as luks;
-use cryptsetup_rs::api::{CryptDeviceHandle, CryptDeviceOpenBuilder, Luks1Params};
-use cryptsetup_rs::{CryptDevice, Luks1CryptDevice};
-
-use libcryptsetup_sys::crypt_keyslot_info;
 use structopt::StructOpt;
 
 use failure::_core::fmt::{Error, Formatter};
@@ -17,65 +13,6 @@ use std::process::exit;
 use std::thread;
 
 use std::time::SystemTime;
-pub fn add_key_to_luks(
-    device: PathBuf,
-    secret: &[u8; 32],
-    old_secret: Box<dyn Fn() -> Fido2LuksResult<Vec<u8>>>,
-    exclusive: bool,
-) -> Fido2LuksResult<u8> {
-    fn offer_format(
-        _dev: CryptDeviceOpenBuilder,
-    ) -> Fido2LuksResult<CryptDeviceHandle<Luks1Params>> {
-        unimplemented!()
-    }
-    let dev =
-        || -> luks::device::Result<CryptDeviceOpenBuilder> { luks::open(&device.canonicalize()?) };
-
-    let prev_key = old_secret()?;
-
-    let mut handle = match dev()?.luks1() {
-        Ok(handle) => handle,
-        Err(luks::device::Error::BlkidError(_)) => offer_format(dev()?)?,
-        Err(luks::device::Error::CryptsetupError(errno)) => {
-            //if i32::from(errno) == 555
-            dbg!(errno);
-            offer_format(dev()?)?
-        } //TODO: find correct errorno and offer to format as luks
-        err => err?,
-    };
-    handle.set_iteration_time(50);
-    let slot = handle.add_keyslot(secret, Some(prev_key.as_slice()), None)?;
-    if exclusive {
-        for old_slot in 0..8u8 {
-            if old_slot != slot
-                && (handle.keyslot_status(old_slot.into()) == crypt_keyslot_info::CRYPT_SLOT_ACTIVE
-                    || handle.keyslot_status(old_slot.into())
-                        == crypt_keyslot_info::CRYPT_SLOT_ACTIVE_LAST)
-            {
-                handle.destroy_keyslot(old_slot)?;
-            }
-        }
-    }
-    Ok(slot)
-}
-
-pub fn add_password_to_luks(
-    device: PathBuf,
-    secret: &[u8; 32],
-    new_secret: Box<dyn Fn() -> Fido2LuksResult<Vec<u8>>>,
-    add_password: bool,
-) -> Fido2LuksResult<u8> {
-    let dev = luks::open(&device.canonicalize()?)?;
-    let mut handle = dev.luks1()?;
-    let prev_slot = if add_password {
-        Some(handle.add_keyslot(&secret[..], Some(&secret[..]), None)?)
-    } else {
-        None
-    };
-    let slot = handle.update_keyslot(&new_secret()?[..], &secret[..], prev_slot)?;
-    Ok(slot)
-}
-
 #[derive(Debug, Eq, PartialEq, Clone)]
 pub struct HexEncoded(Vec<u8>);
 
@@ -265,23 +202,27 @@ pub fn run_cli() -> Fido2LuksResult<()> {
             ref secret_gen,
         } => {
             let secret = secret_gen.patch(&args).obtain_secret()?;
-            let slot = add_key_to_luks(
-                device.clone(),
-                &secret,
-                if let Some(keyfile) = keyfile.clone() {
-                    Box::new(move || util::read_keyfile(keyfile.clone()))
-                } else {
-                    Box::new(|| {
-                        util::read_password("Old password", true).map(|p| p.as_bytes().to_vec())
-                    })
-                },
-                *exclusive,
-            )?;
-            println!(
-                "Added to key to device {}, slot: {}",
-                device.display(),
-                slot
-            );
+            let old_secret = if let Some(keyfile) = keyfile.clone() {
+                util::read_keyfile(keyfile.clone())
+            } else {
+                util::read_password("Old password", false).map(|p| p.as_bytes().to_vec())
+            }?;
+            let added_slot = luks::add_key(device.clone(), &secret, &old_secret[..], Some(10))?;
+            if *exclusive {
+                let destroyed = luks::remove_keyslots(&device, &[added_slot])?;
+                println!(
+                    "Added to key to device {}, slot: {}\nRemoved {} old keys",
+                    device.display(),
+                    added_slot,
+                    destroyed
+                );
+            } else {
+                println!(
+                    "Added to key to device {}, slot: {}",
+                    device.display(),
+                    added_slot
+                );
+            }
             Ok(())
         }
         Command::ReplaceKey {
@@ -291,18 +232,16 @@ pub fn run_cli() -> Fido2LuksResult<()> {
             ref secret_gen,
         } => {
             let secret = secret_gen.patch(&args).obtain_secret()?;
-            let slot = add_password_to_luks(
-                device.clone(),
-                &secret,
-                if let Some(keyfile) = keyfile.clone() {
-                    Box::new(move || util::read_keyfile(keyfile.clone()))
-                } else {
-                    Box::new(|| {
-                        util::read_password("Password to add", true).map(|p| p.as_bytes().to_vec())
-                    })
-                },
-                *add_password,
-            )?;
+            let new_secret = if let Some(keyfile) = keyfile.clone() {
+                util::read_keyfile(keyfile.clone())
+            } else {
+                util::read_password("Password to add", *add_password).map(|p| p.as_bytes().to_vec())
+            }?;
+            let slot = if *add_password {
+                luks::add_key(device, &new_secret[..], &secret, None)
+            } else {
+                luks::replace_key(device, &new_secret[..], &secret, Some(5))
+            }?;
             println!(
                 "Added to password to device {}, slot: {}",
                 device.display(),
@@ -319,7 +258,7 @@ pub fn run_cli() -> Fido2LuksResult<()> {
             let mut retries = *retries;
             loop {
                 let secret = secret_gen.patch(&args).obtain_secret()?;
-                match open_container(&device, &name, &secret) {
+                match luks::open_container(&device, &name, &secret) {
                     Err(e) => match e {
                         Fido2LuksError::WrongSecret if retries > 0 => {
                             retries -= 1;
diff --git a/src/error.rs b/src/error.rs
index dc80014..3af80c3 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -14,7 +14,9 @@ pub enum Fido2LuksError {
     #[fail(display = "no authenticator found, please ensure your device is plugged in")]
     NoAuthenticatorError,
     #[fail(display = "luks err")]
-    LuksError { cause: cryptsetup_rs::device::Error },
+    LuksError {
+        cause: libcryptsetup_rs::LibcryptErr,
+    },
     #[fail(display = "no authenticator found, please ensure your device is plugged in")]
     IoError { cause: io::Error },
     #[fail(display = "supplied secret isn't valid for this device")]
@@ -44,6 +46,7 @@ pub enum AskPassError {
     Mismatch,
 }
 
+use libcryptsetup_rs::LibcryptErr;
 use std::string::FromUtf8Error;
 use Fido2LuksError::*;
 
@@ -53,17 +56,16 @@ impl From<FidoError> for Fido2LuksError {
     }
 }
 
-impl From<cryptsetup_rs::device::Error> for Fido2LuksError {
-    fn from(e: cryptsetup_rs::device::Error) -> Self {
+impl From<LibcryptErr> for Fido2LuksError {
+    fn from(e: LibcryptErr) -> Self {
         match e {
-            cryptsetup_rs::device::Error::CryptsetupError(error_no) if error_no.0 == 1i32 => {
+            LibcryptErr::IOError(e) if e.raw_os_error().iter().any(|code| code == &1i32) => {
                 WrongSecret
             }
-            e => LuksError { cause: e },
+            _ => LuksError { cause: e },
         }
     }
 }
-
 impl From<io::Error> for Fido2LuksError {
     fn from(e: io::Error) -> Self {
         IoError { cause: e }
diff --git a/src/luks.rs b/src/luks.rs
new file mode 100644
index 0000000..a052077
--- /dev/null
+++ b/src/luks.rs
@@ -0,0 +1,84 @@
+use crate::error::*;
+
+use libcryptsetup_rs::{CryptActivateFlags, CryptDevice, CryptInit, EncryptionFormat, KeyslotInfo};
+use std::path::Path;
+
+fn load_device_handle<P: AsRef<Path>>(path: P) -> Fido2LuksResult<CryptDevice> {
+    let mut device = CryptInit::init(path.as_ref())?;
+    //TODO: determine luks version some way other way than just trying
+    let mut load = |format| device.context_handle().load::<()>(format, None).map(|_| ());
+    vec![EncryptionFormat::Luks2, EncryptionFormat::Luks1]
+        .into_iter()
+        .fold(None, |res, format| match res {
+            Some(Ok(())) => res,
+            Some(e) => Some(e.or(load(format))),
+            None => Some(load(format)),
+        })
+        .unwrap()?;
+    Ok(device)
+}
+
+pub fn open_container<P: AsRef<Path>>(path: P, name: &str, secret: &[u8]) -> Fido2LuksResult<()> {
+    let mut device = load_device_handle(path)?;
+    device
+        .activate_handle()
+        .activate_by_passphrase(Some(name), None, secret, CryptActivateFlags::empty())
+        .map(|_slot| ())
+        .map_err(|_e| Fido2LuksError::WrongSecret)
+}
+
+pub fn add_key<P: AsRef<Path>>(
+    path: P,
+    secret: &[u8],
+    old_secret: &[u8],
+    iteration_time: Option<u64>,
+) -> 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(None)
+        .add_by_passphrase(old_secret, secret)?;
+    Ok(slot)
+}
+
+pub fn remove_keyslots<P: AsRef<Path>>(path: P, exclude: &[u32]) -> Fido2LuksResult<u32> {
+    let mut device = load_device_handle(path)?;
+    let mut handle;
+    let mut destroyed = 0;
+    //TODO: detect how many keyslots there are instead of trying within a given range
+    for slot in 0..1024 {
+        handle = device.keyslot_handle(Some(slot));
+        match handle.status()? {
+            KeyslotInfo::Inactive => continue,
+            KeyslotInfo::Active if !exclude.contains(&slot) => {
+                handle.destroy()?;
+                destroyed += 1;
+            }
+            _ => (),
+        }
+        match handle.status()? {
+            KeyslotInfo::ActiveLast => break,
+            _ => (),
+        }
+    }
+    Ok(destroyed)
+}
+
+pub fn replace_key<P: AsRef<Path>>(
+    path: P,
+    secret: &[u8],
+    old_secret: &[u8],
+    iteration_time: Option<u64>,
+) -> 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)
+    }
+    Ok(device
+        .keyslot_handle(None)
+        .change_by_passphrase(None, None, old_secret, secret)? as u32)
+}
diff --git a/src/main.rs b/src/main.rs
index 050fc8f..e0c701c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,9 +5,6 @@ use crate::cli::*;
 use crate::config::*;
 use crate::device::*;
 use crate::error::*;
-use cryptsetup_rs as luks;
-use cryptsetup_rs::Luks1CryptDevice;
-
 use std::io;
 use std::path::PathBuf;
 use std::process::exit;
@@ -16,14 +13,9 @@ mod cli;
 mod config;
 mod device;
 mod error;
+mod luks;
 mod util;
 
-fn open_container(device: &PathBuf, name: &str, secret: &[u8; 32]) -> Fido2LuksResult<()> {
-    let mut handle = luks::open(device.canonicalize()?)?.luks1()?;
-    let _slot = handle.activate(name, &secret[..])?;
-    Ok(())
-}
-
 fn assemble_secret(hmac_result: &[u8], salt: &[u8]) -> [u8; 32] {
     util::sha256(&[salt, hmac_result])
 }