\u5982\u679c\u4f60\u6b63\u5728\u8fd0\u884c\u4f7f\u7528MySQL\u7684Web\u5e94\u7528\u7a0b\u5e8f\uff0c\u90a3\u4e48\u4f60\u628a\u5bc6\u7801\u6216\u8005\u5176\u4ed6\u654f\u611f\u4fe1\u606f\u4fdd\u5b58\u5728\u5e94\u7528\u7a0b\u5e8f\u91cc\u7684\u673a\u4f1a\u5c31\u5f88\u5927\u3002\u4fdd\u62a4\u8fd9\u4e9b\u6570\u636e\u514d\u53d7\u9ed1\u5ba2\u6216\u8005\u7aa5\u63a2\u8005\u7684\u83b7\u53d6 \u662f\u4e00\u4e2a\u4ee4\u4eba\u5173\u6ce8\u7684\u91cd\u8981\u95ee\u9898\uff0c\u56e0\u4e3a\u60a8\u65e2\u4e0d\u80fd\u8ba9\u672a\u7ecf\u6388\u6743\u7684\u4eba\u5458\u4f7f\u7528\u6216\u8005\u7834\u574f\u5e94\u7528\u7a0b\u5e8f\uff0c\u540c\u65f6\u8fd8\u8981\u4fdd\u8bc1\u60a8\u7684\u7ade\u4e89\u4f18\u52bf\u3002\u5e78\u8fd0\u7684\u662f\uff0cMySQL\u5e26\u6709\u5f88\u591a\u8bbe\u8ba1\u7528\u6765\u63d0\u4f9b\u8fd9 \u79cd\u7c7b\u578b\u5b89\u5168\u7684\u52a0\u5bc6\u51fd\u6570\u3002\u672c\u6587\u6982\u8ff0\u4e86\u5176\u4e2d\u7684\u4e00\u4e9b\u51fd\u6570\uff0c\u5e76\u8bf4\u660e\u4e86\u5982\u4f55\u4f7f\u7528\u5b83\u4eec\uff0c\u4ee5\u53ca\u5b83\u4eec\u80fd\u591f\u63d0\u4f9b\u7684\u4e0d\u540c\u7ea7\u522b\u7684\u5b89\u5168\u3002
\u53cc\u5411\u52a0\u5bc6
\u5c31\u8ba9\u6211\u4eec\u4ece\u6700\u7b80\u5355\u7684\u52a0\u5bc6\u5f00\u59cb\uff1a\u53cc\u5411\u52a0\u5bc6\u3002\u5728\u8fd9\u91cc\uff0c\u4e00\u6bb5\u6570\u636e\u901a\u8fc7\u4e00\u4e2a\u5bc6\u94a5\u88ab\u52a0\u5bc6\uff0c\u53ea\u80fd\u591f\u7531\u77e5\u9053\u8fd9\u4e2a\u5bc6\u94a5\u7684\u4eba\u6765\u89e3\u5bc6\u3002MySQL\u6709\u4e24\u4e2a\u51fd\u6570\u6765\u652f\u6301\u8fd9\u79cd\u7c7b\u578b\u7684\u52a0\u5bc6\uff0c\u5206\u522b\u53eb\u505aENCODE()\u548cDECODE()\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u5b9e\u4f8b\uff1a
mysql> Insert INTO users (username, password)
VALUES (‘joe’, ENCODE(‘guessme’, ‘abracadabra’));
Query OK, 1 row affected (0.14 sec)
\u5176\u4e2d\uff0cJoe\u7684\u5bc6\u7801\u662fguessme\uff0c\u5b83\u901a\u8fc7\u5bc6\u94a5abracadabra\u88ab\u52a0\u5bc6\u3002\u8981\u6ce8\u610f\u7684\u662f\uff0c\u52a0\u5bc6\u5b8c\u7684\u7ed3\u679c\u662f\u4e00\u4e2a\u4e8c\u8fdb\u5236\u5b57\u7b26\u4e32\uff0c\u5982\u4e0b\u6240\u793a\uff1a
mysql> Select * FROM users Where username=’joe’;
+———-+———-+
| username | password |
+———-+———-+
| joe | ??i??!? |
+———-+———-+
1 row in set (0.02 sec)
abracadabra\u8fd9\u4e2a\u5bc6\u94a5\u5bf9\u4e8e\u6062\u590d\u5230\u539f\u59cb\u7684\u5b57\u7b26\u4e32\u81f3\u5173\u91cd\u8981\u3002\u8fd9\u4e2a\u5bc6\u94a5\u5fc5\u987b\u88ab\u4f20\u9012\u7ed9DECODE()\u51fd\u6570\uff0c\u4ee5\u83b7\u5f97\u539f\u59cb\u7684\u3001\u672a\u52a0\u5bc6\u7684\u5bc6\u7801\u3002\u4e0b\u9762\u5c31\u662f\u5b83\u7684\u4f7f\u7528\u65b9\u6cd5\uff1a
mysql> Select DECODE(password, ‘abracadabra’)
FROM users Where username=’joe’;
+———————————+
| DECODE(password, ‘abracadabra’) |
+———————————+
| guessme |
+———————————+
1 row in set (0.00 sec)
\u5e94\u8be5\u5f88\u5bb9\u6613\u5c31\u770b\u5230\u5b83\u5728Web\u5e94\u7528\u7a0b\u5e8f\u91cc\u662f\u5982\u4f55\u8fd0\u884c\u7684\u2014\u2014\u5728\u9a8c\u8bc1\u7528\u6237\u767b\u5f55\u7684\u65f6\u5019\uff0cDECODE()\u4f1a\u7528\u7f51\u7ad9\u4e13\u7528\u7684\u5bc6\u94a5\u89e3\u5f00\u4fdd\u5b58\u5728\u6570\u636e\u5e93\u91cc\u7684\u5bc6\u7801\uff0c\u5e76\u548c\u7528\u6237\u8f93\u5165\u7684\u5185\u5bb9\u8fdb\u884c\u5bf9\u6bd4\u3002\u5047\u8bbe\u60a8\u628aPHP\u7528\u4f5c\u81ea\u5df1\u7684\u811a\u672c\u8bed\u8a00\uff0c\u90a3\u4e48\u53ef\u4ee5\u50cf\u4e0b\u9762\u8fd9\u6837\u8fdb\u884c\u67e5\u8be2\uff1a
undefined undefined
$query = “Select COUNT(*) FROM users Where
username=’$inputUser’ AND DECODE(password,
‘abracadabra’) = ‘$inputPass'”;?>
\u6ce8\u610f\uff1a\u867d\u7136ENCODE()\u548cDECODE()\u8fd9\u4e24\u4e2a\u51fd\u6570\u80fd\u591f\u6ee1\u8db3\u5927\u591a\u6570\u7684\u8981\u6c42\uff0c\u4f46\u662f\u6709\u7684\u65f6\u5019\u60a8\u5e0c\u671b\u4f7f\u7528\u5f3a\u5ea6\u66f4\u9ad8\u7684\u52a0\u5bc6\u624b\u6bb5\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528AES_ENCRYPT()\u548cAES_DECRYPT()\u51fd\u6570\uff0c\u5b83\u4eec\u7684\u5de5\u4f5c\u65b9\u5f0f\u662f\u76f8\u540c\u7684\uff0c\u4f46\u662f\u52a0\u5bc6\u5f3a\u5ea6\u66f4\u9ad8\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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