feat(ext/crypto): initial support for p521 in `generateKey` and `importKey` (#21815)

Part 1 of a potential 3 part series. Ref #13449 

The current implementation passes key material back and forth RustCrypto
group of crates and ring. ring does not implement p521 yet.

This PR adds support for P521 named curve in `generateKey` and
`importKey` where we use RustCrypto. Other parts should be moved over to
the RustGroup group of crates for consistency.

1 files changed, 39 insertions, 0 deletions

diff --git a/cli/tests/unit/webcrypto_test.ts b/cli/tests/unit/webcrypto_test.ts
index 4e1a31eaa..829330eba 100644
--- a/cli/tests/unit/webcrypto_test.ts
+++ b/cli/tests/unit/webcrypto_test.ts
@@ -2006,3 +2006,42 @@ Deno.test(async function testHmacJwkImport() {
     ["sign", "verify"],
   );
 });
+
+Deno.test(async function p521Import() {
+  const jwk = {
+    "crv": "P-521",
+    "ext": true,
+    "key_ops": [
+      "verify",
+    ],
+    "kty": "EC",
+    "x":
+      "AXkSI8nfkc6bu3fifXGuKKbu08g5LKPfxUNQJJYzzPgmN8XLDzx0C9Sdeejl1XoWGrheKPHl0k4tUmHw0cdInpfj",
+    "y":
+      "AT4vjsO0bzVRlN3Wthv9DewncDXS2tlTob5QojV8WX1GzOAikRfWFEP3nspoSv88U447acZAsk5IvgGJuVjgMDlx",
+  };
+  const algorithm = { name: "ECDSA", namedCurve: "P-521" };
+
+  const key = await crypto.subtle.importKey(
+    "jwk",
+    jwk,
+    algorithm,
+    true,
+    ["verify"],
+  );
+
+  assert(key instanceof CryptoKey);
+});
+
+Deno.test(async function p521Generate() {
+  const algorithm = { name: "ECDSA", namedCurve: "P-521" };
+
+  const key = await crypto.subtle.generateKey(
+    algorithm,
+    true,
+    ["sign", "verify"],
+  );
+
+  assert(key.privateKey instanceof CryptoKey);
+  assert(key.publicKey instanceof CryptoKey);
+});