Question

I can’t seem to find documentation on authentication into mongodb from the C driver. The C driver API has no information on it as far as I can tell. However, this link makes me think that it’s possible. A link or a code snippet would be great. Thanks!

Answer 1

Here’s the function to call.

MONGO_EXPORT int mongo_cmd_authenticate     (
        mongo *         conn,
        const char *    db,
        const char *    user,
        const char *    pass
    )

Authenticate a user.

Parameters:
        conn    a mongo object.
        db      the database to authenticate against.
        user    the user name to authenticate.
        pass    the user's password.

Returns:
    MONGO_OK on sucess and MONGO_ERROR on failure.

Here’s an excerpt from the test code as an example – mongo-c-driver/test/auth_test.c

if ( mongo_connect( conn , TEST_SERVER, 27017 ) ) {
    printf( "failed to connect\n" );
    exit( 1 );
}

ASSERT( mongo_cmd_authenticate( conn, db, "user", "password" ) == MONGO_OK );

...

Hope that this helps. Here are some links for futher information.

References:

MongoDB C Language Center – http://www.mongodb.org/display/DOCS/C+Language+Center

MongoDB C Driver Documentation – http://api.mongodb.org/c/current/

MongoDB C Driver API Docs – http://api.mongodb.org/c/current/api/index.html

mongo.h File Referenc – http://api.mongodb.org/c/current/api/mongo_8h.html

mongo_cmd_authenticate – http://api.mongodb.org/c/current/api/mongo_8h.html#a715aaa6b82e23486e6caad2b544f2ebf

MongoDB C Driver source code – https://github.com/mongodb/mongo-c-driver

test/auth_test.c – https://github.com/mongodb/mongo-c-driver/blob/master/test/auth_test.c