---
{
"title": "SM4",
"language": "en"
}
---

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# SM4_ENCRYPT

## description
SM4 加密函数
### Syntax

`VARCHAR SM4_ENCRYPT(str,key_str[,init_vector])`

返回加密后的结果

## example

```
MySQL > select TO_BASE64(SM4_ENCRYPT('text','F3229A0B371ED2D9441B830D21A390C3'));
+--------------------------------+
| to_base64(sm4_encrypt('text')) |
+--------------------------------+
| aDjwRflBrDjhBZIOFNw3Tg==       |
+--------------------------------+
1 row in set (0.010 sec)

MySQL > set block_encryption_mode="SM4_128_CBC";
Query OK, 0 rows affected (0.001 sec)

MySQL > select to_base64(SM4_ENCRYPT('text','F3229A0B371ED2D9441B830D21A390C3', '0123456789'));
+----------------------------------------------------------------------------------+
| to_base64(sm4_encrypt('text', 'F3229A0B371ED2D9441B830D21A390C3', '0123456789')) |
+----------------------------------------------------------------------------------+
| G7yqOKfEyxdagboz6Qf01A==                                                         |
+----------------------------------------------------------------------------------+
1 row in set (0.014 sec)
```

# SM4_DECRYPT

## description
Aes 解密函数
### Syntax

`VARCHAR AES_DECRYPT(str,key_str[,init_vector])`

返回解密后的结果

## example

```
MySQL [(none)]> select SM4_DECRYPT(FROM_BASE64('aDjwRflBrDjhBZIOFNw3Tg=='),'F3229A0B371ED2D9441B830D21A390C3');
+------------------------------------------------------+
| sm4_decrypt(from_base64('aDjwRflBrDjhBZIOFNw3Tg==')) |
+------------------------------------------------------+
| text                                                 |
+------------------------------------------------------+
1 row in set (0.009 sec)

MySQL> set block_encryption_mode="SM4_128_CBC";
Query OK, 0 rows affected (0.006 sec)

MySQL > select SM4_DECRYPT(FROM_BASE64('G7yqOKfEyxdagboz6Qf01A=='),'F3229A0B371ED2D9441B830D21A390C3', '0123456789');
+--------------------------------------------------------------------------------------------------------+
| sm4_decrypt(from_base64('G7yqOKfEyxdagboz6Qf01A=='), 'F3229A0B371ED2D9441B830D21A390C3', '0123456789') |
+--------------------------------------------------------------------------------------------------------+
| text                                                                                                   |
+--------------------------------------------------------------------------------------------------------+
1 row in set (0.012 sec)
```

## keyword

    SM4_ENCRYPT, SM4_DECRYPT