Add streaming API

Cargo.toml

@@ -16,6 +16,8 @@ chacha20poly1305 = { version = "0.10", default-features = false, features = ["he
 serde = { version = "1.0.160", default-features = false, features = ["derive"] }
 rand_core = { version = "0.6.4", default-features = false }
 delog = "0.1.6"
+littlefs2 = "0.4.0"
+serde-byte-array = "0.1.2"
 
 [dev-dependencies]
 trussed = { version = "0.1.0", default-features = false, features = ["serde-extensions", "virt"] }
@@ -24,6 +26,8 @@ trussed = { version = "0.1.0", default-features = false, features = ["serde-exte
 default = []
 
 wrap-key-to-file = ["chacha20poly1305"]
+chunked = []
+encrypted-chunked = ["chunked", "chacha20poly1305/stream"]
 
 virt = ["std", "trussed/virt"]
 std = []

Makefile

@@ -9,7 +9,7 @@ check:
 lint:
 	cargo clippy --all-features --all-targets -- --deny warnings
 	cargo fmt -- --check
-	RUSTDOCFLAGS='-Dwarnings' cargo doc --no-deps
+	RUSTDOCFLAGS='-Dwarnings' cargo doc --no-deps --all-features
 	reuse lint
 
 .PHONY: test

src/lib.rs

@@ -2,14 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0 or MIT
 
 #![cfg_attr(not(any(test, feature = "std")), no_std)]
-#![warn(
-    missing_debug_implementations,
-    // missing_docs,
-    non_ascii_idents,
-    trivial_casts,
-    unused,
-    unused_qualifications
-)]
+#![warn(non_ascii_idents, trivial_casts, unused, unused_qualifications)]
 #![deny(unsafe_code)]
 
 delog::generate_macros!();
@@ -22,6 +15,9 @@ pub mod virt;
 #[cfg(feature = "wrap-key-to-file")]
 pub mod wrap_key_to_file;
 
+#[cfg(feature = "chunked")]
+pub mod streaming;
+
 #[derive(Clone, Debug, Default)]
 #[non_exhaustive]
 pub struct StagingBackend {}
@@ -32,9 +28,12 @@ impl StagingBackend {
     }
 }
 
-#[derive(Default, Debug)]
+#[derive(Default)]
 #[non_exhaustive]
-pub struct StagingContext {}
+pub struct StagingContext {
+    #[cfg(feature = "chunked")]
+    chunked_io_state: Option<streaming::ChunkedIoState>,
+}
 
 impl Backend for StagingBackend {
     type Context = StagingContext;