feat: rewrite key.rs

- Introduce `KeyHandle` and `Passphrase` types

- Refactor the functions into associated functions

- Add `zeroizing` crate to handle passphrase memory safely

Signed-off-by: Thomas Mühlbacher <tmuehlbacher@posteo.net>

1 files changed, 21 insertions, 0 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 61e55c83..11b3bd5f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -90,6 +90,7 @@ dependencies = [
  "strum_macros",
  "udev",
  "uuid",
+ "zeroize",
 ]
 
 [[package]]
@@ -773,3 +774,23 @@ name = "windows_x86_64_msvc"
 version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dff9641d1cd4be8d1a070daf9e3773c5f67e78b4d9d42263020c057706765c04"
+
+[[package]]
+name = "zeroize"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde"
+dependencies = [
+ "zeroize_derive",
+]
+
+[[package]]
+name = "zeroize_derive"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]