mongodb/jstests/ssl/ssl_cn_with_san.js

// Test that a certificate with a valid CN, but invalid SAN
// does not permit connection, but provides a useful error.

(function() {
'use strict';
load('jstests/ssl/libs/ssl_helpers.js');

// server-intermediate-ca was signed by ca.pem, not trusted-ca.pem
const CA = 'jstests/libs/ca.pem';
const SERVER = 'jstests/ssl/libs/localhost-cn-with-san.pem';

const mongod = MongoRunner.runMongod({
    sslMode: 'requireSSL',
    sslPEMKeyFile: SERVER,
    sslCAFile: CA,
});
assert(mongod);

// Try with `tlsAllowInvalidHostnames` to look for the warning.
clearRawMongoProgramOutput();
const mongo = runMongoProgram('mongo',
                              '--tls',
                              '--tlsCAFile',
                              CA,
                              'localhost:' + mongod.port,
                              '--eval',
                              ';',
                              '--tlsAllowInvalidHostnames');
assert.neq(mongo, 0, "Shell connected when it should have failed");
assert(rawMongoProgramOutput().includes(' would have matched, but was overridden by SAN'),
       'Expected detail warning not seen');

// On OpenSSL only, start without `tlsAllowInvalidHostnames`
// Windowds/Mac will bail out too early to show this message.
if (determineSSLProvider() === 'openssl') {
    clearRawMongoProgramOutput();
    const mongo = runMongoProgram(
        'mongo', '--tls', '--tlsCAFile', CA, 'localhost:' + mongod.port, '--eval', ';');
    assert.neq(mongo, 0, "Shell connected when it should have failed");
    assert(rawMongoProgramOutput().includes(
               'CN: localhost would have matched, but was overridden by SAN'),
           'Expected detail warning not seen');
}

MongoRunner.stopMongod(mongod);
})();