Commit Inicial

node_modules/jose/dist/webapi/util/decode_protected_header.js

@@ -0,0 +1,34 @@
+import { decode as b64u } from './base64url.js';
+import { decoder } from '../lib/buffer_utils.js';
+import { isObject } from '../lib/type_checks.js';
+export function decodeProtectedHeader(token) {
+    let protectedB64u;
+    if (typeof token === 'string') {
+        const parts = token.split('.');
+        if (parts.length === 3 || parts.length === 5) {
+            ;
+            [protectedB64u] = parts;
+        }
+    }
+    else if (typeof token === 'object' && token) {
+        if ('protected' in token) {
+            protectedB64u = token.protected;
+        }
+        else {
+            throw new TypeError('Token does not contain a Protected Header');
+        }
+    }
+    try {
+        if (typeof protectedB64u !== 'string' || !protectedB64u) {
+            throw new Error();
+        }
+        const result = JSON.parse(decoder.decode(b64u(protectedB64u)));
+        if (!isObject(result)) {
+            throw new Error();
+        }
+        return result;
+    }
+    catch {
+        throw new TypeError('Invalid Token or Protected Header formatting');
+    }
+}