How to encrypt the data in MySQL database? Mysql8.0 comes with new features

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Encryption function is mainly used to encrypt data and process interface , To ensure that some important data are not obtained by others .

Encryption function MD5(str)

md5(str) String calculate one md5 128 Bit checksum .

The value is expressed in 32 Returns... As a binary string of hexadecimal digits , If the parameter is null, Then the returned value is null;

mysql> select md5('yunweijia'), length(md5('yunweijia'));
+----------------------------------+--------------------------+
| md5('yunweijia')                 | length(md5('yunweijia')) |
+----------------------------------+--------------------------+
| e1c2c47c0b1d8ca6076030bf8e8ea42a |                       32 |
+----------------------------------+--------------------------+
1 row in set (0.00 sec)

mysql>

You can see that it is indeed a 32 String of hexadecimal digits with bit length .

Encryption function SHA(str)

SHA(str) From the original plaintext password str Calculate and return the encrypted password string , When the parameter is null When , The returned value is null.

SHA Encryption algorithm relative to MD5 encryption algorithm , It will be safer .

mysql> select sha('yunweijia');
+------------------------------------------+
| sha('yunweijia')                         |
+------------------------------------------+
| 683501978a90d76d420b893cd7e00c8efde8e8f3 |
+------------------------------------------+
1 row in set (0.00 sec)

mysql>

Encryption function SHA2(str, hash_length)

SHA2(str, hash_length)： Use hash_length As length , Encrypted string str;

hash_length The value of support is ：224、256、384、512 and 0, Why is there 0 Well , If it is 0 Words , It's the equivalent of 256 了 .

mysql> select sha2('yunweijia', 256) as A, sha2('yunweijia', 0) as B\G;
*************************** 1. row ***************************
A: 1c60cca8fb0ef62bbf751245f72bbb7c308d59d773214133dc6051cd4acd0b64
B: 1c60cca8fb0ef62bbf751245f72bbb7c308d59d773214133dc6051cd4acd0b64
1 row in set (0.00 sec)

ERROR:
No query specified

mysql>

From the above running results, we can see ha , When our hash_length The value of is 256 and 0 when , Their results are consistent .

thus , In this paper, the end .

For more information, go to VX official account “ Operation and maintenance home ” , Get the latest article .

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