这个是怎么加密的啊？厂家说是 DES 加密，试了半天没搞出来

2020-08-31 11:28:28 +08:00
 bwd1991
密文 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秘钥 lsl123456
2103 次点击
所在节点    问与答
8 条回复
wakzz
2020-08-31 11:42:31 +08:00
这年头还用 DES，这算法已经标记为不安全了。
只有秘钥没有初始向量的话，那估计是 DES-ECB 加密算法了。而且 DES 的合法秘钥长度是 8 字节，你这个 9 字节的秘钥肯定是不对的。
让厂家给个代码 demo，或者直接给个 OpenSSL 命令 demo 。怀疑厂家提供的密钥并不是真正的密钥，还需要其他算法例如 JDK 的 SecureRandom 把初始密钥计算成参与加密算法的真正 8 字节长度密钥。
bwd1991
2020-08-31 14:01:49 +08:00
@wakzz 我找了几个方法都不行 厂家就个实施让我自己试 我找了几个在线的都是生成带特殊符号的 他这个是怎么做的啊 原文就是个 json 有思路吗
javashell
2020-08-31 14:15:32 +08:00
{"prescription":[{"delnum":"","hospital_name":"兰溪市中医院","pspnum":"1001373570","name":"胡美珍","sex":2,"age":64,"phone":"15167972589","address":"浙江省兰溪市桥头大丰大报亭（大丰大边上）","department":"","inpatientarea":"","Ward":"","Sickbed":"","diagresult":"结缔组织病、无并发症","dose":7,"takenum":2,"getdrugtime":"dhySYSTEM","getdrugnum":0,"decscheme":21,"oncetime":"dhySYSTEM","twicetime":"dhySYSTEM","packagenum":200,"dotime":"dhySYSTEM","doperson":"X488","dtbcompany":"胡美珍","dtbaddress":"浙江省兰溪市桥头大丰大报亭（大丰大边上）","dtbphone":"15167972589","dtbtype":4,"soakwater":"dhySYSTEM","soaktime":30,"labelnum":0,"remark":"","doctor":"G014","footnote":"","ordertime":"dhySYSTEM","curstate":"","decmothed":"dhySYSTEM","takeway":"dhySYSTEM","takemethod":"内服","remarkA":"","remarkB":"","drug_count":"18","isDaijian":"dhySYSTEM","payment":"","Yizhu":"","money":"","outpatientNumber":"B25760375","outpatientIndex":"12448144","ptype":"dhySYSTEM"}],"drug":[{"drugnum":"44910","drugname":"郁金 1g","drugposition":"1g","drugallnum":10,"drugdescription":"","tienum":2,"drugweight":70,"description":"","retailprice":"0.0983","unit":"g"},{"drugnum":"43808","drugname":"炒白芍 1g","drugposition":"1g","drugallnum":10,"drugdescription":"","tienum":2,"drugweight":70,"description":"","retailprice":"0.1243","unit":"g"},{"drugnum":"45585","drugname":"熟地 1g","drugposition":"1g","drugallnum":10,"drugdescription":"","tienum":2,"drugweight":70,"description":"","retailprice":"0.085","unit":"g"},{"drugnum":"45344","drugname":"山药（复方） 1g","drugposition":"1g","drugallnum":12,"drugdescription":"","tienum":2,"drugweight":84,"description":"","retailprice":"0.061","unit":"g"},{"drugnum":"44854","drugname":"枸杞子（复方） 1g","drugposition":"1g","drugallnum":10,"drugdescription":"","tienum":2,"drugweight":70,"description":"","retailprice":"0.2204","unit":"g"},{"drugnum":"44806","drugname":"覆盆子 1g","drugposition":"1g","drugallnum":6,"drugdescription":"","tienum":2,"drugweight":42,"description":"","retailprice":"0.3591","unit":"g"},{"drugnum":"45547","drugname":"太子参 1g","drugposition":"1g","drugallnum":12,"drugdescription":"","tienum":2,"drugweight":84,"description":"","retailprice":"0.351","unit":"g"},{"drugnum":"45763","drugname":"蜜黄芪(复方) 1g","drugposition":"1g","drugallnum":12,"drugdescription":"","tienum":2,"drugweight":84,"description":"","retailprice":"0.1161","unit":"g"},{"drugnum":"45757","drugname":"蜜甘草(复方) 1g","drugposition":"1g","drugallnum":6,"drugdescription":"","tienum":2,"drugweight":42,"description":"","retailprice":"0.1215","unit":"g"},{"drugnum":"45805","drugname":"桑椹（复方) 1g","drugposition":"1g","drugallnum":10,"drugdescription":"","tienum":2,"drugweight":70,"description":"","retailprice":"0.223","unit":"g"},{"drugnum":"44980","drugname":"盐杜仲 1g","drugposition":"1g","drugallnum":10,"drugdescription":"","tienum":2,"drugweight":70,"description":"","retailprice":"0.072","unit":"g"},{"drugnum":"45677","drugname":"路路通 1g","drugposition":"1g","drugallnum":10,"drugdescription":"","tienum":2,"drugweight":70,"description":"","retailprice":"0.0361","unit":"g"},{"drugnum":"45665","drugname":"鹿角片 1g","drugposition":"1g","drugallnum":6,"drugdescription":"","tienum":2,"drugweight":42,"description":"","retailprice":"1.08","unit":"g"},{"drugnum":"45405","drugname":"仙灵脾 1g","drugposition":"1g","drugallnum":10,"drugdescription":"","tienum":2,"drugweight":70,"description":"","retailprice":"0.1307","unit":"g"},{"drugnum":"45735","drugname":"玫瑰花 1g","drugposition":"1g","drugallnum":10,"drugdescription":"","tienum":2,"drugweight":70,"description":"","retailprice":"0.1978","unit":"g"},{"drugnum":"45793","drugname":"砂仁（复方） 1g","drugposition":"1g","drugallnum":4,"drugdescription":"后下","tienum":2,"drugweight":28,"description":"","retailprice":"1.215","unit":"g"},{"drugnum":"45437","drugname":"五味子 1g","drugposition":"1g","drugallnum":8,"drugdescription":"","tienum":2,"drugweight":56,"description":"","retailprice":"0.7493","unit":"g"},{"drugnum":"43834","drugname":"车前子（包） 1g","drugposition":"1g","drugallnum":12,"drugdescription":"包煎","tienum":2,"drugweight":84,"description":"","retailprice":"0.182","unit":"g"}]}
bwd1991
2020-08-31 16:03:23 +08:00
@javashell 这个是怎么加密的啊 能给段代码吗？
javashell
2020-08-31 16:10:31 +08:00
@bwd1991 des 的 cbc 模式，密钥和向量都是同一个，http://tool.chacuo.net/cryptdes 就可以解
bwd1991
2020-08-31 16:27:40 +08:00
@javashell 我试了下只出现一个 j 啊 还需要配置什么吗 ？ DES 加密模式: CBC
填充: zeropadding
密码: lsl123456
偏移量: lsl123456
输出: base64 字符集：gb2312
javashell
2020-08-31 16:53:20 +08:00
先把密文 hex 转成 strings 然后我填充选的是 pkcs5
aurthur
2020-09-01 09:53:35 +08:00
理论解释：
- 密码：确认加密模式是 DES-CBC 的话，那么你的密钥长度肯定不对，只需要 8 位，尝试去掉最后一位好了（很多加密算法实现时密钥长度超出默认只用前 8 位，并不报错），所以 **密码 = lsl12345**
- 偏移量：这里厂家未告知你偏移量，默认就用密码（这也是算法实现时的毛病），所以 **偏移量 = lsl12345**
- 再来确认密文组：对于 DES-CBC 加密模式来说，数据加密后模式是多组 64 位长度的密文块，这时候你的密文要存在数据库里一般会把它转成字符串存进去。
- 这时候 密文块 到 字符串 一般使用两种方式，要么 toHex，要么 toBase64
- 这里看密文是 hex 模式，我尝试了一下，直接反解是失败的
- 根据上面老哥提示，我将密文先从 hexToString 尝试了一下，得到一串字符串，一看就是 Base64 自符
- 故知：**厂家是将密文组 先 toBase64，再 toHex，这时候我们依次先 hexToString 一下，再将 Base64ToByte 一下得到密文组**
- 填充模式：这里选 **pkcs5**，其实用的是标准算法是无所谓的
- 解密即可得到你要的数据了

代码实战（我这里是 Golang ），你自己根据上面理论套一下就可以了

![Imgur]( )

你也可以使用在线工具试一下： https://www.ssleye.com/des_cipher.html

![Imgur]( )

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