fix(ext/node): handle KeyObject in `prepareAsymmetricKey` (#23026)

Fixes https://github.com/denoland/deno/issues/20938

1 files changed, 6 insertions, 0 deletions

diff --git a/ext/node/polyfills/internal/crypto/keys.ts b/ext/node/polyfills/internal/crypto/keys.ts
index 74379015b..4ab8cac4f 100644
--- a/ext/node/polyfills/internal/crypto/keys.ts
+++ b/ext/node/polyfills/internal/crypto/keys.ts
@@ -215,6 +215,12 @@ export interface JsonWebKeyInput {
 export function prepareAsymmetricKey(key) {
   if (isStringOrBuffer(key)) {
     return { format: "pem", data: getArrayBufferOrView(key, "key") };
+  } else if (isKeyObject(key)) {
+    return {
+      // Assumes that assymetric keys are stored as PEM.
+      format: "pem",
+      data: getKeyMaterial(key),
+    };
   } else if (typeof key == "object") {
     const { key: data, encoding, format, type } = key;
     if (!isStringOrBuffer(data)) {