fix(ext/crypto): support EC p256 private key material in exportKey (#13547)

Co-authored-by: Luca Casonato <hello@lcas.dev>

1 files changed, 16 insertions, 0 deletions

diff --git a/cli/tests/unit/webcrypto_test.ts b/cli/tests/unit/webcrypto_test.ts
index ba6aaa327..0e7e2829a 100644
--- a/cli/tests/unit/webcrypto_test.ts
+++ b/cli/tests/unit/webcrypto_test.ts
@@ -1668,3 +1668,19 @@ Deno.test(async function testAesGcmTagLength() {
     );
   });
 });
+
+Deno.test(async function ecPrivateKeyMaterialExportSpki() {
+  // `generateKey` generates a key pair internally stored as "private" key.
+  const keys = await crypto.subtle.generateKey(
+    { name: "ECDSA", namedCurve: "P-256" },
+    true,
+    ["sign", "verify"],
+  );
+
+  assert(keys.privateKey instanceof CryptoKey);
+  assert(keys.publicKey instanceof CryptoKey);
+
+  // `exportKey` should be able to perform necessary conversion to export spki.
+  const spki = await crypto.subtle.exportKey("spki", keys.publicKey);
+  assert(spki instanceof ArrayBuffer);
+});