1 files changed, 32 insertions, 0 deletions
diff --git a/cli/util/checksum.rs b/cli/util/checksum.rs
new file mode 100644
index 000000000..c0e41356d
--- /dev/null
+++ b/cli/util/checksum.rs
@@ -0,0 +1,32 @@
+// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
+
+use ring::digest::Context;
+use ring::digest::SHA256;
+
+pub fn gen(v: &[impl AsRef<[u8]>]) -> String {
+  let mut ctx = Context::new(&SHA256);
+  for src in v {
+    ctx.update(src.as_ref());
+  }
+  let digest = ctx.finish();
+  let out: Vec<String> = digest
+    .as_ref()
+    .iter()
+    .map(|byte| format!("{:02x}", byte))
+    .collect();
+  out.join("")
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  #[test]
+  fn test_gen() {
+    let actual = gen(&[b"hello world"]);
+    assert_eq!(
+      actual,
+      "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9"
+    );
+  }
+}