SHA2
description
使用SHA2对信息进行摘要处理。
Syntax
SHA2(str, digest_length)
Arguments
str: 待加密的内容digest_length: 摘要长度，支持 224, 256, 384, 512
example
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)keywords
SHA2, SHA224, SHA256, SHAA384, SHA512