Unable to AES_DECRYPT after AES_ENCRYPT in mysql

According to the Manual:

AES_ENCRYPT() encrypts a string and returns a binary string. AES_DECRYPT() decrypts the encrypted string and returns the original string.

  • MySQL 5.1 Doc: AES_ENCRYPT() / AES_DECRYPT()

I don't know why it is still returning a binary string in your case. Anyway, try this:

SELECT *, 
       CAST(AES_DECRYPT(first_name, 'usa2010') AS CHAR(50)) first_name_decrypt 
FROM   user

And use first_name_decrypt instead of first_name.


From mysql command line client there is no need to use CAST:

mysql> SELECT AES_DECRYPT(AES_ENCRYPT('admin','abc'),'abc');

+-----------------------------------------------+
| AES_DECRYPT(AES_ENCRYPT('admin','abc'),'abc') |
+-----------------------------------------------+
| admin                                         |
+-----------------------------------------------+
1 row in set (0.00 sec)

mysql> SELECT CAST(AES_DECRYPT(AES_ENCRYPT('admin','abc'),'abc') AS CHAR (50));

+------------------------------------------------------------------+
| CAST(AES_DECRYPT(AES_ENCRYPT('admin','abc'),'abc') AS CHAR (50)) |
+------------------------------------------------------------------+
| admin                                                            |
+------------------------------------------------------------------+
1 row in set (0.02 sec)

As you can see using cast in command line is little bit slower. But I have noticed that if you use some tools like phpmyadmin, then you need to use CAST, otherwise result will be wrong.

Tags:

Mysql

Encryption

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