AES_DECRYPT

Decrypt data using AES. This function decrypts a string that was encrypted using the Advanced Encryption Standard (AES) algorithm.

Syntax

Current

AES_ENCRYPT(crypt_str, key_str, [, iv [, mode]])

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Description

This function allows decryption of data using the official AES (Advanced Encryption Standard) algorithm. For more information, see the description of AES_ENCRYPT().

Current

The function supports an initialization vector, and control of the block encryption mode. The default mode is specified by the block_encryption_mode system variable, which can be changed when calling the function with a mode. mode is aes-{128,192,256}-{ecb,cbc,ctr} for example: "AES-128-cbc".

For modes that require it, the initialization_vector iv should be 16 bytes (it can be longer, but the extra bytes are ignored). A shorter iv, where one is required, results in the function returning NULL. Calling RANDOM_BYTES(16) will generate a random series of bytes that can be used for the iv.

Examples

SELECT HEX(AES_ENCRYPT('foo', 'bar', '0123456789abcdef', 'aes-128-ctr')) AS x; 
+--------+
| x      |
+--------+
| C57C4B |
+--------+


SELECT AES_DECRYPT(x'C57C4B', 'bar', '0123456789abcdef', 'aes-128-ctr'); 
+------------------------------------------------------------------+
| AES_DECRYPT(x'C57C4B', 'bar', '0123456789abcdef', 'aes-128-ctr') |
+------------------------------------------------------------------+
| foo                                                              |
+------------------------------------------------------------------+

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