1 files changed, 52 insertions, 0 deletions
diff --git a/std/uuid/v5.ts b/std/uuid/v5.ts
new file mode 100644
index 000000000..1216762dd
--- /dev/null
+++ b/std/uuid/v5.ts
@@ -0,0 +1,52 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+import {
+  bytesToUuid,
+  createBuffer,
+  stringToBytes,
+  uuidToBytes,
+} from "./_common.ts";
+import { Sha1 } from "../util/sha1.ts";
+import { isString } from "../node/util.ts";
+import { assert } from "../testing/asserts.ts";
+
+const UUID_RE = /^[0-9a-f]{8}-[0-9a-f]{4}-[5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
+
+export function validate(id: string): boolean {
+  return UUID_RE.test(id);
+}
+
+interface V5Options {
+  value: string | number[];
+  namespace: string | number[];
+}
+
+export function generate(
+  options: V5Options,
+  buf?: number[],
+  offset?: number
+): string | number[] {
+  const i = (buf && offset) || 0;
+
+  let { value, namespace } = options;
+  if (isString(value)) value = stringToBytes(value as string);
+  if (isString(namespace)) namespace = uuidToBytes(namespace as string);
+  assert(
+    namespace.length === 16,
+    "namespace must be uuid string or an Array of 16 byte values"
+  );
+
+  const content = (namespace as number[]).concat(value as number[]);
+  const bytes = new Sha1().update(createBuffer(content)).digest();
+
+  bytes[6] = (bytes[6] & 0x0f) | 0x50;
+  bytes[8] = (bytes[8] & 0x3f) | 0x80;
+
+  if (buf) {
+    for (let idx = 0; idx < 16; ++idx) {
+      buf[i + idx] = bytes[idx];
+    }
+  }
+
+  return buf || bytesToUuid(bytes);
+}