fix(ext/node): compute pem length (upper bound) for key exports (#26231)

Fixes https://github.com/denoland/deno/issues/26188

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/unit_node/crypto/crypto_key_test.ts b/tests/unit_node/crypto/crypto_key_test.ts
index 7995ce5d3..3c7ad4423 100644
--- a/tests/unit_node/crypto/crypto_key_test.ts
+++ b/tests/unit_node/crypto/crypto_key_test.ts
@@ -656,3 +656,24 @@ z6TExWlQMjt66nV7R8cRAkzmABrG+NW3e8Zpac7Lkuv+zu0S+K7c
   assertEquals(publicKey.type, "public");
   assertEquals(publicKey.asymmetricKeyType, "rsa");
 });
+
+// https://github.com/denoland/deno/issues/26188
+Deno.test("generateKeyPair large pem", function () {
+  const passphrase = "mypassphrase";
+  const cipher = "aes-256-cbc";
+  const modulusLength = 4096;
+
+  generateKeyPairSync("rsa", {
+    modulusLength,
+    publicKeyEncoding: {
+      type: "spki",
+      format: "pem",
+    },
+    privateKeyEncoding: {
+      type: "pkcs8",
+      format: "pem",
+      cipher,
+      passphrase,
+    },
+  });
+});