Syntax

DES_DECRYPT(crypt_str[,key_str])

Description

Decrypts a string encrypted with DES_ENCRYPT(). If an error occurs, this function returns NULL.

This function works only if MariaDB has been configured with TLS support.

If no key_str argument is given, DES_DECRYPT() examines the first byte of the encrypted string to determine the DES key number that was used to encrypt the original string, and then reads the key from the DES key file to decrypt the message. For this to work, the user must have the SUPER privilege. The key file can be specified with the --des-key-file server option.

If you pass this function a key_str argument, that string is used as the key for decrypting the message.

If the crypt_str argument does not appear to be an encrypted string, MariaDB returns the given crypt_str.