Add support for Basic authentication

src/index.ts

@@ -72,6 +72,39 @@ interface LoginCredentials {
   password: string;
 }
 
+enum ChallengeType {
+  Basic,
+  Digest,
+  Unknown
+};
+
+function getAuthType(
+  challenge: string,
+): ChallengeType {
+  const parts = challenge.split(' ');
+  let challengeType = ChallengeType.Unknown;
+
+  if (parts) {
+    if (parts[0] === 'Basic') {
+      challengeType = ChallengeType.Basic;
+    } else if (parts[0] === 'Digest') {
+      challengeType = ChallengeType.Digest;
+    }
+  }
+
+  return challengeType;
+}
+
+function getBasicAuthHeader(
+  credentials: LoginCredentials,
+): string {
+  const auth = Buffer.from(`${credentials.username}:${credentials.password}`).toString('base64');
+  return [
+    'Basic',
+    auth,
+  ].join(' ');
+}
+
 function getAuthHeader(
   credentials: LoginCredentials,
   method: string,
@@ -144,15 +177,25 @@ async function sendCommand(
         request,
         response,
       } = err;
-      const challengeHeader = response.headers['www-authenticate'];
-      if (response.status === 401 && challengeHeader) {
+      const challengeHeader = response?.headers['www-authenticate'];
+      if (response?.status === 401) {
         if (failCount >= 3) {
           throw new Error('Authentication failed. Check credentials');
         }
 
         const { username, password } = config;
         const credentials = { username, password };
-        const authHeader = getAuthHeader(credentials, request.method, requestURI, challengeHeader);
+
+        const authType = getAuthType(challengeHeader);
+        let authHeader;
+        if (authType === ChallengeType.Digest) {
+          authHeader = getAuthHeader(credentials, request.method, requestURI, challengeHeader);
+        } else if (authType === ChallengeType.Basic) {
+          authHeader = getBasicAuthHeader(credentials);
+        } else {
+          throw new Error('Authentication failed and the challenge type is unknown.');
+        }
+
         return sendCommand(
           config,
           command,