feat(std/hash): reimplement all hashes in WASM (#6292)

1 files changed, 51 insertions, 0 deletions

diff --git a/std/hash/_wasm/src/lib.rs b/std/hash/_wasm/src/lib.rs
new file mode 100644
index 000000000..5ada7e68a
--- /dev/null
+++ b/std/hash/_wasm/src/lib.rs
@@ -0,0 +1,51 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+use digest::{Digest, DynDigest};
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+pub struct DenoHash {
+  inner: Box<dyn DynDigest>,
+}
+
+#[wasm_bindgen]
+pub fn create_hash(algorithm: &str) -> Result<DenoHash, JsValue> {
+  let hash: Option<Box<dyn DynDigest>> = match algorithm {
+    "md2" => Some(Box::new(md2::Md2::new())),
+    "md4" => Some(Box::new(md4::Md4::new())),
+    "md5" => Some(Box::new(md5::Md5::new())),
+    "ripemd160" => Some(Box::new(ripemd160::Ripemd160::new())),
+    "ripemd320" => Some(Box::new(ripemd320::Ripemd320::new())),
+    "sha1" => Some(Box::new(sha1::Sha1::new())),
+    "sha224" => Some(Box::new(sha2::Sha224::new())),
+    "sha256" => Some(Box::new(sha2::Sha256::new())),
+    "sha384" => Some(Box::new(sha2::Sha384::new())),
+    "sha512" => Some(Box::new(sha2::Sha512::new())),
+    "sha3-224" => Some(Box::new(sha3::Sha3_224::new())),
+    "sha3-256" => Some(Box::new(sha3::Sha3_256::new())),
+    "sha3-384" => Some(Box::new(sha3::Sha3_384::new())),
+    "sha3-512" => Some(Box::new(sha3::Sha3_512::new())),
+    "keccak224" => Some(Box::new(sha3::Keccak224::new())),
+    "keccak256" => Some(Box::new(sha3::Keccak256::new())),
+    "keccak384" => Some(Box::new(sha3::Keccak384::new())),
+    "keccak512" => Some(Box::new(sha3::Keccak512::new())),
+    _ => None,
+  };
+
+  if let Some(h) = hash {
+    Ok(DenoHash { inner: h })
+  } else {
+    let err_msg = format!("unsupported hash algorithm: {}", algorithm);
+    Err(JsValue::from_str(&err_msg))
+  }
+}
+
+#[wasm_bindgen]
+pub fn update_hash(hash: &mut DenoHash, data: &[u8]) {
+  hash.inner.input(data)
+}
+
+#[wasm_bindgen]
+pub fn digest_hash(hash: &mut DenoHash) -> Box<[u8]> {
+  hash.inner.result_reset()
+}