Add support for CPE digest authentication

test/auth.ts

@@ -0,0 +1,49 @@
+import ava from "ava";
+import { randomBytes } from "crypto";
+import * as auth from "../lib/auth";
+
+ava("digest", t => {
+  const username = "test";
+  const password = "test";
+  const uri = "/";
+  const method = "POST";
+  const realm = "GeniceACS";
+  const nonce = randomBytes(16).toString("hex");
+  const body = randomBytes(128).toString();
+
+  const challenges = [
+    `Digest realm="${realm}",nonce="${nonce}"`,
+    `Digest realm="${realm}",nonce="${nonce}",qop="auth"`,
+    `Digest realm="${realm}",nonce="${nonce}",qop="auth-int"`
+  ];
+
+  t.plan(challenges.length);
+
+  for (const challenge of challenges) {
+    const wwwAuthHeader = auth.parseWwwAuthenticateHeader(challenge);
+    const solution = auth.solveDigest(
+      username,
+      password,
+      uri,
+      method,
+      body,
+      wwwAuthHeader
+    );
+    const authHeader = auth.parseAuthorizationHeader(solution);
+    t.is(
+      authHeader["response"],
+      auth.digest(
+        username,
+        realm,
+        password,
+        nonce,
+        method,
+        uri,
+        authHeader["qop"],
+        body,
+        authHeader["cnonce"],
+        authHeader["nc"]
+      )
+    );
+  }
+});