1 files changed, 29 insertions, 0 deletions
diff --git a/extensions/crypto/lib.rs b/extensions/crypto/lib.rs
index 0ec7f4717..9d71cc761 100644
--- a/extensions/crypto/lib.rs
+++ b/extensions/crypto/lib.rs
@@ -1,7 +1,9 @@
 // Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
 
+use deno_core::error::null_opbuf;
 use deno_core::error::AnyError;
 use deno_core::include_js_files;
+use deno_core::op_async;
 use deno_core::op_sync;
 use deno_core::Extension;
 use deno_core::OpState;
@@ -10,7 +12,10 @@ use rand::rngs::StdRng;
 use rand::thread_rng;
 use rand::Rng;
 use rand::SeedableRng;
+use ring::digest;
+use std::cell::RefCell;
 use std::path::PathBuf;
+use std::rc::Rc;
 
 pub use rand; // Re-export rand
 
@@ -18,6 +23,7 @@ pub fn init(maybe_seed: Option<u64>) -> Extension {
   Extension::builder()
     .js(include_js_files!(
       prefix "deno:extensions/crypto",
+      "00_webidl.js",
       "01_crypto.js",
     ))
     .ops(vec![
@@ -25,6 +31,7 @@ pub fn init(maybe_seed: Option<u64>) -> Extension {
         "op_crypto_get_random_values",
         op_sync(op_crypto_get_random_values),
       ),
+      ("op_crypto_subtle_digest", op_async(op_crypto_subtle_digest)),
       ("op_crypto_random_uuid", op_sync(op_crypto_random_uuid)),
     ])
     .state(move |state| {
@@ -78,6 +85,28 @@ pub fn op_crypto_random_uuid(
   Ok(uuid.to_string())
 }
 
+pub async fn op_crypto_subtle_digest(
+  _state: Rc<RefCell<OpState>>,
+  algorithm_id: i8,
+  data: Option<ZeroCopyBuf>,
+) -> Result<ZeroCopyBuf, AnyError> {
+  let algorithm = match algorithm_id {
+    0 => &digest::SHA1_FOR_LEGACY_USE_ONLY,
+    1 => &digest::SHA256,
+    2 => &digest::SHA384,
+    3 => &digest::SHA512,
+    _ => panic!("Invalid algorithm id"),
+  };
+
+  let input = data.ok_or_else(null_opbuf)?;
+  let output = tokio::task::spawn_blocking(move || {
+    digest::digest(algorithm, &input).as_ref().to_vec().into()
+  })
+  .await?;
+
+  Ok(output)
+}
+
 pub fn get_declaration() -> PathBuf {
   PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("lib.deno_crypto.d.ts")
 }