---
{
    "title": "Encrption and Masking Function ",
    "language": "en"
}
---

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Doris provides the following built-in encryption and masking functions. For detailed usage, please refer to the SQL manual.

## AES_ENCRYPT

An AES encryption function. 

This function behaves the same as the` AES_ENCRYPT` function in MySQL. It uses the AES_128_ECB algorithm by default, with PKCS7 padding mode. Encryption is performed using the OpenSSL library as the underlying mechanism. Reference: https://dev.mysql.com/doc/refman/8.0/en/encryption-functions.html#function_aes-decrypt

```sql
select to_base64(aes_encrypt('text','F3229A0B371ED2D9441B830D21A390C3'));

+--------------------------------+
| to_base64(aes_encrypt('text')) |
+--------------------------------+
| wr2JEDVXzL9+2XtRhgIloA==       |
+--------------------------------+
1 row in set (0.01 sec)
```

## AES_DECRYPT

An AES decryption function. This function behaves the same as the `AES_DECRYPT` function in MySQL. It uses the AES_128_ECB algorithm by default, with PKCS7 padding mode. Decryption is performed using the OpenSSL library as the underlying mechanism.

```sql
select aes_decrypt(from_base64('wr2JEDVXzL9+2XtRhgIloA=='),'F3229A0B371ED2D9441B830D21A390C3');
+------------------------------------------------------+
| aes_decrypt(from_base64('wr2JEDVXzL9+2XtRhgIloA==')) |
+------------------------------------------------------+
| text                                                 |
+------------------------------------------------------+
1 row in set (0.01 sec)
```

## MD5

Calculates the MD5 128-bit hash.

```sql
MySQL [(none)]> select md5("abc");
+----------------------------------+
| md5('abc')                       |
+----------------------------------+
| 900150983cd24fb0d6963f7d28e17f72 |
+----------------------------------+
1 row in set (0.013 sec)
```

## MD5SUM

Calculates the MD5 128-bit hash for multiple strings.

```sql
MySQL > select md5("abcd");
+----------------------------------+
| md5('abcd')                      |
+----------------------------------+
| e2fc714c4727ee9395f324cd2e7f331f |
+----------------------------------+
1 row in set (0.011 sec)

MySQL > select md5sum("ab","cd");
+----------------------------------+
| md5sum('ab', 'cd')               |
+----------------------------------+
| e2fc714c4727ee9395f324cd2e7f331f |
+----------------------------------+
1 row in set (0.008 sec)
```

## SM4_ENCRYPT

SM4 encryption function.

```sql
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)
```

## SM3

Calculates the SM3 256-bit hash for multiple strings.

```sql
MySQL > select sm3("abcd");
+------------------------------------------------------------------+
| sm3('abcd')                                                      |
+------------------------------------------------------------------+
| 82ec580fe6d36ae4f81cae3c73f4a5b3b5a09c943172dc9053c69fd8e18dca1e |
+------------------------------------------------------------------+
1 row in set (0.009 sec)
```

## SM3SUM

Calculates the SM3 256-bit hash for multiple strings.

```sql
MySQL > select sm3("abcd");
+------------------------------------------------------------------+
| sm3('abcd')                                                      |
+------------------------------------------------------------------+
| 82ec580fe6d36ae4f81cae3c73f4a5b3b5a09c943172dc9053c69fd8e18dca1e |
+------------------------------------------------------------------+
1 row in set (0.009 sec)

MySQL > select sm3sum("ab","cd");
+------------------------------------------------------------------+
| sm3sum('ab', 'cd')                                               |
+------------------------------------------------------------------+
| 82ec580fe6d36ae4f81cae3c73f4a5b3b5a09c943172dc9053c69fd8e18dca1e |
+------------------------------------------------------------------+
1 row in set (0.009 sec)
```

## SHA

Calculates the SHA1 hash using the SHA1 algorithm.

## SHA2

Calculates the SHA2 hash using SHA2 algorithm.

```sql
mysql> select sha2('abc', 224);
+----------------------------------------------------------+
| sha2('abc', 224)                                         |
+----------------------------------------------------------+
| 23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7 |
+----------------------------------------------------------+
1 row in set (0.13 sec)

mysql> select sha2('abc', 384);
+--------------------------------------------------------------------------------------------------+
| sha2('abc', 384)                                                                                 |
+--------------------------------------------------------------------------------------------------+
| cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed8086072ba1e7cc2358baeca134c825a7 |
+--------------------------------------------------------------------------------------------------+
1 row in set (0.13 sec)

mysql> select sha2(NULL, 512);
+-----------------+
| sha2(NULL, 512) |
+-----------------+
| NULL            |
+-----------------+
1 row in set (0.09 sec)
```

## DIGITAL_MASKING

An alias function with the original function being `CONCAT(LEFT(id,3),'****',RIGHT(id,4))`. Performs data masking on the input `digital_number` and returns the masked result. 

The `digital_number` is of type `BIGINT`.

```sql
mysql select digital_masking(13812345678);
+------------------------------+
| digital_masking(13812345678) |
+------------------------------+
| 138****5678                  |
+------------------------------+
```