SERVER-47188 Return appropriate error messages from saslStart

1 files changed, 47 insertions, 0 deletions

diff --git a/jstests/auth/sasl-unknown-mech.js b/jstests/auth/sasl-unknown-mech.js
new file mode 100644
index 00000000000..43b793fb20f
--- /dev/null
+++ b/jstests/auth/sasl-unknown-mech.js
@@ -0,0 +1,47 @@
+// Test for saslStart invoked with invalid/missing mechanism.
+
+(function() {
+'use strict';
+
+const mongod = MongoRunner.runMongod({auth: ''});
+const admin = mongod.getDB('admin');
+
+admin.createUser(
+    {user: 'admin', pwd: 'pwd', roles: ['root'], mechanisms: ['SCRAM-SHA-1', 'SCRAM-SHA-256']});
+admin.auth('admin', 'pwd');
+
+// base64 encoded: 'n,,n=admin,r=deadbeefcafeba11';
+const client1Payload = 'biwsbj1hZG1pbixyPWRlYWRiZWVmY2FmZWJhMTE=';
+
+function saslStart(mechanism) {
+    let cmd = {saslStart: 1};
+    if (mechanism !== undefined) {
+        cmd.mechanism = mechanism;
+        cmd.payload = client1Payload;
+    }
+    jsTest.log(tojson(cmd));
+    const result = admin.runCommand(cmd);
+    printjson(result);
+    return result;
+}
+
+function saslStartSuccess(mechanism) {
+    const response = assert.commandWorked(saslStart(mechanism));
+    assert.gt(response.payload.length, client1Payload.length);
+    assert.eq(response.done, false);
+    assert.gte(response.conversationId, 0);
+}
+saslStartSuccess('SCRAM-SHA-1');
+saslStartSuccess('SCRAM-SHA-256');
+
+function saslStartFailure(mechanism) {
+    const response = assert.commandFailed(saslStart(mechanism));
+    assert.gt(response.errmsg.length, 0);
+    assert.neq(response.code, 0);
+}
+saslStartFailure('scram-sha-1');
+saslStartFailure('MONGODB-CR');
+saslStartFailure(undefined);
+
+MongoRunner.stopMongod(mongod);
+})();