这是一个创建于 1543 天前的主题，其中的信息可能已经有所发展或是发生改变。
密文 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秘钥 lsl123456
秘钥 lsl123456
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1
wakzz 2020-08-31 11:42:31 +08:00  1
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。 |
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2
bwd1991 OP @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
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javashell 2020-08-31 14:15:32 +08:00 via Android 1
{"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"}]}
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javashell 2020-08-31 16:10:31 +08:00 via Android
@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
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6
bwd1991 OP @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 |
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javashell 2020-08-31 16:53:20 +08:00 via Android
先把密文 hex 转成 strings 然后我填充选的是 pkcs5
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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  )你也可以使用在线工具试一下： https://www.ssleye.com/des_cipher.html  ) |
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