fix(ext/node): support x509 certificates in createPublicKey (#25731)

Fixes https://github.com/denoland/deno/issues/25681

ext/node/ops/crypto/keys.rs

@@ -752,7 +752,15 @@ impl KeyObjectHandle {
               | KeyObjectHandle::Secret(_) => unreachable!(),
             }
           }
-          // TODO: handle x509 certificates as public keys
+          "CERTIFICATE" => {
+            let (_, pem) = x509_parser::pem::parse_x509_pem(pem.as_bytes())
+              .map_err(|_| type_error("invalid x509 certificate"))?;
+
+            let cert = pem.parse_x509()?;
+            let public_key = cert.tbs_certificate.subject_pki;
+
+            return KeyObjectHandle::new_x509_public_key(&public_key);
+          }
           _ => {
             return Err(type_error(format!("unsupported PEM label: {}", label)))
           }

tests/unit_node/crypto/crypto_key_test.ts

@@ -631,3 +631,28 @@ xjwfpTZOdWW36U3GRuXn12QyITRg6el7ro6CajhCVNg9nJIxvZzp0jyE
 
   assertEquals(privatePkcs8, pkcs8Expected);
 });
+
+Deno.test("createPublicKey x509", function () {
+  const certificate = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`;
+
+  const publicKey = createPublicKey(certificate);
+  assertEquals(publicKey.type, "public");
+  assertEquals(publicKey.asymmetricKeyType, "rsa");
+});