How can I use MD5 hashing for passwords in Laravel?

I'm porting over a legacy app into Laravel. The old app used MD5 to hash the passwords without a salt, so I need to replicate that within Laravel. For the record, we are changing the passwords to bcrypt with a salt, but it's not a simple process and requires a user login to do so - for the meantime I just need to get logins working with the legacy hashes.

I have followed this guide to convert Auth::hash to MD5: How to use SHA1 encryption instead of BCrypt in Laravel 4?

When I print out the password in plain text and the generated hash in my make method when registering an account:

public function make($value, array $options = array()) {
    echo $value.'<br>'.hash('md5', $value);
    exit;
    return hash('md5', $value);
}

I get the following:

123456
e10adc3949ba59abbe56e057f20f883e

Great, that's what I need. However, when that is saved to the database I get a different hash entirely. My guess is that Laravel is salting the password elsewhere, but I can't find where and how to override this.

My MD5Hasher.php file inside app/libraries:

<?php
class MD5Hasher implements Illuminate\Contracts\Hashing\Hasher {

    /**
     * Hash the given value.
     *
     * @param  string  $value
     * @return array   $options
     * @return string
     */
    public function make($value, array $options = array()) {
        return hash('md5', $value);
    }

    /**
     * Check the given plain value against a hash.
     *
     * @param  string  $value
     * @param  string  $hashedValue
     * @param  array   $options
     * @return bool
     */
    public function check($value, $hashedValue, array $options = array()) {
        return $this->make($value) === $hashedValue;
    }

    /**
     * Check if the given hash has been hashed using the given options.
     *
     * @param  string  $hashedValue
     * @param  array   $options
     * @return bool
     */
    public function needsRehash($hashedValue, array $options = array()) {
        return false;
    }

}

My MD5HashServiceProvider.php:

<?php
class MD5HashServiceProvider extends Illuminate\Support\ServiceProvider {

    /**
     * Register the service provider.
     *
     * @return void
     */
    public function register() {
        $this->app['hash'] = $this->app->share(function () {
            return new MD5Hasher();
        });

    }

    /**
     * Get the services provided by the provider.
     *
     * @return array
     */
    public function provides() {
        return array('hash');
    }

}

via Chebli Mohamed