From 98fd0e14ead529e416f327a2a40a2f95f9e1a164 Mon Sep 17 00:00:00 2001
From: stuebinm
Date: Thu, 1 Apr 2021 17:44:06 +0200
Subject: proof of concept: age in wasm in a browser

---
 .gitignore   |    5 +
 Cargo.lock   | 1260 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml   |   49 +++
 src/lib.rs   |   47 +++
 src/utils.rs |   10 +
 tests/web.rs |   13 +
 6 files changed, 1384 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/lib.rs
 create mode 100644 src/utils.rs
 create mode 100644 tests/web.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1711838
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+/target
+**/*.rs.bk
+bin/
+pkg/
+wasm-pack.log
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..5284451
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,1260 @@
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+ "cfg-if 0.1.10",
+ "libc",
+ "memory_units",
+ "winapi",
+]
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+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
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+ "curve25519-dalek",
+ "rand_core",
+ "zeroize",
+]
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+ "zeroize_derive",
+]
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+name = "zeroize_derive"
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..0afb436
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,49 @@
+[package]
+name = "rage-wasm"
+version = "0.1.0"
+authors = ["stuebinm"]
+edition = "2018"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[features]
+default = ["console_error_panic_hook"]
+
+[dependencies]
+
+chrono = { version = "0.4", features = ["wasmbind"] }
+getrandom = { version = "0.1", features = ["wasm-bindgen"] }
+wasm-bindgen = "0.2.63"
+age = "0.5.1"
+
+
+# The `console_error_panic_hook` crate provides better debugging of panics by
+# logging them with `console.error`. This is great for development, but requires
+# all the `std::fmt` and `std::panicking` infrastructure, so isn't great for
+# code size when deploying.
+console_error_panic_hook = { version = "0.1.6", optional = true }
+
+# `wee_alloc` is a tiny allocator for wasm that is only ~1K in code size
+# compared to the default allocator's ~10K. It is slower than the default
+# allocator, however.
+#
+# Unfortunately, `wee_alloc` requires nightly Rust when targeting wasm for now.
+wee_alloc = { version = "0.4.5", optional = true }
+
+[dependencies.web-sys]
+version = "0.3"
+features = [
+    "Blob",
+    "BlobPropertyBag",
+    "File",
+    "ReadableStream",
+    "console",
+]
+
+[dev-dependencies]
+wasm-bindgen-test = "0.3.13"
+
+[profile.release]
+# Tell `rustc` to optimize for small code size.
+opt-level = "s"
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..c422e2b
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,47 @@
+mod utils;
+
+use wasm_bindgen::prelude::*;
+
+use std::io::{Read, Write};
+use std::iter;
+
+
+use age::x25519::Recipient;
+
+//use rand::{rngs::OsRng, RngCore};
+
+// When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
+// allocator.
+#[cfg(feature = "wee_alloc")]
+#[global_allocator]
+static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
+
+#[wasm_bindgen]
+extern {
+    fn alert(s: &str);
+}
+
+#[wasm_bindgen]
+pub fn greet() {
+    alert("Hello, {{project-name}}!");
+}
+
+
+#[wasm_bindgen]
+pub fn lalala(plaintext : String) -> Option<Vec<u8>> {
+
+    utils::set_panic_hook();
+
+    let pubkey = "age1m6k5wqnrk63wxhlwtl7s244ngmacn6xph3lxjd3x735f6wm8z4lsysfzg5".parse::<Recipient>().ok()?;
+
+    let encryptor = age::Encryptor::with_recipients(vec![Box::new(pubkey)]);
+
+    let mut encrypted = vec![];
+
+    let mut writer = encryptor.wrap_output(&mut encrypted).ok()?;
+
+    writer.write_all(&plaintext.as_bytes()).ok()?;
+    writer.finish().ok()?;
+
+    Some(encrypted)
+}
diff --git a/src/utils.rs b/src/utils.rs
new file mode 100644
index 0000000..b1d7929
--- /dev/null
+++ b/src/utils.rs
@@ -0,0 +1,10 @@
+pub fn set_panic_hook() {
+    // When the `console_error_panic_hook` feature is enabled, we can call the
+    // `set_panic_hook` function at least once during initialization, and then
+    // we will get better error messages if our code ever panics.
+    //
+    // For more details see
+    // https://github.com/rustwasm/console_error_panic_hook#readme
+    #[cfg(feature = "console_error_panic_hook")]
+    console_error_panic_hook::set_once();
+}
diff --git a/tests/web.rs b/tests/web.rs
new file mode 100644
index 0000000..de5c1da
--- /dev/null
+++ b/tests/web.rs
@@ -0,0 +1,13 @@
+//! Test suite for the Web and headless browsers.
+
+#![cfg(target_arch = "wasm32")]
+
+extern crate wasm_bindgen_test;
+use wasm_bindgen_test::*;
+
+wasm_bindgen_test_configure!(run_in_browser);
+
+#[wasm_bindgen_test]
+fn pass() {
+    assert_eq!(1 + 1, 2);
+}
-- 
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