1 files changed, 19 insertions, 0 deletions
diff --git a/src/lib/pgp/trust.ts b/src/lib/pgp/trust.ts
new file mode 100644
index 0000000..cf022b4
--- /dev/null
+++ b/src/lib/pgp/trust.ts
@@ -0,0 +1,19 @@
+import type { Key } from "npm:openpgp@^6.1.1";
+import { TRUSTED_KEYS_DIR } from "../../consts.ts";
+import { createKeysFromDir } from "./create.ts";
+import type { AsyncYieldType } from "../../utils/iterator.ts";
+import { equal, getCall } from "../../utils/anonymous.ts";
+
+let trusted:
+  | Iterable<AsyncYieldType<ReturnType<typeof createKeysFromDir>>>
+  | undefined = undefined;
+
+const fingerprints = () =>
+  Iterator.from(trusted ?? []).map(getCall("getFingerprint"));
+
+export async function keyTrust(key: Key): Promise<number> {
+  if (trusted === undefined) {
+    trusted = await Array.fromAsync(createKeysFromDir(TRUSTED_KEYS_DIR));
+  }
+  return fingerprints().some(equal(key.getFingerprint())) ? 255 : 0;
+}