create extension pgcrypto;
定义--encrypt(bytea, bytea, text)--
text加密方式
AES
DES/3DES/CAST5
Blowfish
查询表时一定符合类型
select nm, encrypt(cast(tb1.nm as bytea) ,'aa','aes') from tb1
select nm,test,
encrypt(cast(test as bytea) ,'aa','aes') as 加密,
convert_from(decrypt(encrypt(cast(test as bytea),'aa','aes'),'aa','aes'),'SQL_ASCII') as 解密
from tb1
---------------------------------------------------------
select encrypt('123456年a','aa','aes');
--\000\003AXv\327\370\351\363\006\242\267A\245yX
select convert_from(decrypt('\000\003AXv\327\370\351\363\006\242\267A\245yX','aa','aes'),'SQL_ASCII');
--123456年a
select convert_from(decrypt(encrypt('123456年a','aa','aes'),'aa','aes'),'SQL_ASCII');
--123456年a