Encrypted Settings Field

This module adds the "encrypted settings" field through Field API, which has the following two features:

• The field can be encrypted before saving to the database
• The field can be validated to follow INI format

This module is ideal to save credential settings information, such as a "Credit Card" field to add to users' profile. For example, the following credit card info:

card_number=123456789
card_holder_name="John Wayne"
card_holder_address="123 South St., Ann Arbor, MI"

would be save to the database as:

kjmtcS84UQl0vCAiongqh82M1m6Q8FebA8IW2EGm
Ojl7IwZSx3B3mufKBx0LBq12HND1Q8TIf8lLq6sZ2BOGh5CGGoLdM
rUiyV8gZxTuEACI1WvIbXlJ+yz8o+GmItsbsFBxNgezKdg=

Note that this field is intended to work with plain text. It doesn't go through any input filters. See #1139994: Rename module to Encrypted Field?. In addition, this module is best to encrypt INI-style settings. To encrypt existing field (could be any type), please see http://drupal.org/sandbox/tedbow/1208762.

You need to install the PHP mcrypt library in order to use the encryption feature. Also, you need to add $mcrypt_secret_key="..." in settings.php file. Otherwise, the first 6 characters of $drupal_hash_salt in settings.php would be used as the secret key for encryption purpose.

Note: The encryption method used in this module has limitation on the lenghth of secret key. For higher level of security, please see #1136440: Integration with "AES" or "Encryption" module. For even higher level of security, please enable https: http://drupal.org/https-information

This module is developed by Daniel Zhou from Michiza Computing