4 files changed, 90 insertions, 0 deletions
diff --git a/op_crates/crypto/01_crypto.js b/op_crates/crypto/01_crypto.js
new file mode 100644
index 000000000..2f9424492
--- /dev/null
+++ b/op_crates/crypto/01_crypto.js
@@ -0,0 +1,25 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+((window) => {
+  const core = window.Deno.core;
+  function getRandomValues(typedArray) {
+    if (typedArray == null) throw new Error("Input must not be null");
+    if (typedArray.length > 65536) {
+      throw new Error("Input must not be longer than 65536");
+    }
+    const ui8 = new Uint8Array(
+      typedArray.buffer,
+      typedArray.byteOffset,
+      typedArray.byteLength,
+    );
+    core.jsonOpSync("op_get_random_values", {}, ui8);
+    return typedArray;
+  }
+  window.crypto = {
+    getRandomValues,
+  };
+  window.__bootstrap = window.__bootstrap || {};
+  window.__bootstrap.crypto = {
+    getRandomValues,
+  };
+})(this);
diff --git a/op_crates/crypto/Cargo.toml b/op_crates/crypto/Cargo.toml
new file mode 100644
index 000000000..3bcaf7490
--- /dev/null
+++ b/op_crates/crypto/Cargo.toml
@@ -0,0 +1,19 @@
+# Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+[package]
+name = "deno_crypto"
+version = "0.1.1"
+edition = "2018"
+description = "Collection of WebCrypto APIs"
+authors = ["the Deno authors"]
+license = "MIT"
+readme = "README.md"
+repository = "https://github.com/denoland/deno"
+
+[lib]
+path = "lib.rs"
+
+[dependencies]
+deno_core = { version = "0.67.0", path = "../../core" }
+rand = "0.7.3"
+
diff --git a/op_crates/crypto/README.md b/op_crates/crypto/README.md
new file mode 100644
index 000000000..0e1c248e6
--- /dev/null
+++ b/op_crates/crypto/README.md
@@ -0,0 +1,3 @@
+# deno crypto
+
+Op crate that implements crypto functions.
diff --git a/op_crates/crypto/lib.rs b/op_crates/crypto/lib.rs
new file mode 100644
index 000000000..a211a29b3
--- /dev/null
+++ b/op_crates/crypto/lib.rs
@@ -0,0 +1,43 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+#![deny(warnings)]
+
+use deno_core::error::AnyError;
+use deno_core::serde_json::json;
+use deno_core::serde_json::Value;
+use deno_core::JsRuntime;
+use deno_core::OpState;
+use deno_core::ZeroCopyBuf;
+use rand::rngs::StdRng;
+use rand::thread_rng;
+use rand::Rng;
+
+pub use rand; // Re-export rand
+
+/// Execute this crates' JS source files.
+pub fn init(isolate: &mut JsRuntime) {
+  let files = vec![(
+    "deno:op_crates/crypto/01_crypto.js",
+    include_str!("01_crypto.js"),
+  )];
+  for (url, source_code) in files {
+    isolate.execute(url, source_code).unwrap();
+  }
+}
+
+pub fn op_get_random_values(
+  state: &mut OpState,
+  _args: Value,
+  zero_copy: &mut [ZeroCopyBuf],
+) -> Result<Value, AnyError> {
+  assert_eq!(zero_copy.len(), 1);
+  let maybe_seeded_rng = state.try_borrow_mut::<StdRng>();
+  if let Some(seeded_rng) = maybe_seeded_rng {
+    seeded_rng.fill(&mut *zero_copy[0]);
+  } else {
+    let mut rng = thread_rng();
+    rng.fill(&mut *zero_copy[0]);
+  }
+
+  Ok(json!({}))
+}