本篇讲解如何使用CmAct私钥来解析RAU和DYN文件
本来，我也想用RAU文件作为例子的，但是RAU文件对应的wbc文件还差一个系统特征没有对上，导致我没有办法获得CmAct证书的私钥，也就没有办法去解析RAU文件。
实际的机器也不在我手上，没有办法通过调试来查找原因，所以先用DYN文件作为例子，这个问题有空再解决。
DYN文件最容易获得，所以本文将以DYN文件为例。
DYN文件在每次导入LIC文件时都会产生一份新的，所以可以在虚拟机环境下也可以获取。
DYN文件和RAU文件的结构类似，所以解析DYN文件的过程同样能用于RAU文件。
本节从头演示在虚拟机中导入LIF、生成wbc和DYN文件、获取私钥的过程：
当前环境一览：
如果在虚拟机里导入LIF，则最好清除一遍中间文件，这样不会把新生成的中间文件和之前的弄混。
注意，如果在实体机上操作，不要清除中间文件，否则你的之前授权将无法正常工作。
备份好wbc文件后，就可以尝试获取私钥。
在test.py中填入wbc路径，然后运行即可，完整代码见github。
wbc.py将尝试获取系统特征并与item节匹配，一旦wbc文件里的所有item节匹配成功，则可以输出私钥。
CmAct证书的私钥可以通过Q=dG来验证其有效性，其中Q为公钥，G为基点。
验证可以使用wibu_asn1.py的check_CmAct_key函数，但使用check_CmAct_key函数之前，需要调用解析rac_proc函数来处理RAC文件，rac_proc会解析RAC文件中的所有证书并添加到证书链中。
以下代码首先解析了RAC文件并将结果打印出来，接着调用check_CmAct_key函数来验证私钥是否与CmAct证书对应。
现在已经获得CmAct密钥并且验证了其正确性。
DYN文件是一段envelope数据，满足PKCS#7的标准。
其中contentEncryptionAlgorithm为2.16.840.1.101.3.4.1.2，这表示接下来的encryptedContent是一段aes128-CBC加密的数据。
而aes的密钥则使用CmAct证书的公钥加密并存放于encryptedKey中，解密需要用到CmAct证书的私钥。
更加具体的过程见wibu_asn1.py的dyn_proc函数。
实际上，直接调用dyn_proc函数并传入私钥即可解密DYN文件（RAU文件同理），效果如下：
实际上，DYN文件并不大，所以解析后感兴趣的数据并不是特别多。
也许RAU文件中的有用的数据会更多，存在条件的读者可以尝试解析一下RAU文件，本人也很好奇RAU文件的内容是怎么样的？
> uname -a
Linux ubuntu 5.4.0-132-generic
> cmu -v
cmu - CodeMeter Universal Support Tool.
Version 6.60 of 2017-Dec-18 (Build 2869) for Linux
Copyright (C) 2007-2017 by WIBU-SYSTEMS AG. All rights reserved.
Operating System:
Name: Ubuntu 18.04.6 LTS (Kernel 5.4.0-132-generic)
Architecture: x86_64
Current system user:
username: mjs
domain:
RunTime version information:
cmu: 6.60.2869.500 2017-12-18
CodeMeter-Service: 6.60.2869.500 2017-12-18
CodeMeterAct: 6.60.2869.500 2017-12-18
Library: 6.60.2869.500 2017-12-18
Installed file version information:
CodeMeter-Service: 6.60.2869.500 2017-12-18 (64bit)
CodeMeterCC: 6.60.2869.500 2017-12-18 (64bit)
codemeter-info: 6.60.2869.500 2017-12-18 (64bit)
cmu: 6.60.2869.500 2017-12-18 (64bit)
CM Lib (/usr/lib/i386-linux-gnu): 6.60.2869.500 2017-12-18 (32bit)
CM Lib (/usr/lib/x86_64-linux-gnu): 6.60.2869.500 2017-12-18 (64bit)
Note on libusb program library used on Linux-operating systems by
CodeMeter License Server:
The programming library serves to read and write USB devices. The code is
licensed under the GNU Lesser General Public License (LGPL) Version 2.1.
Call cmu --licensing-terms to view it.
The code of the programming library libusb can be downloaded at the project
website http://www.libusb.org/. On request the source can also be electronically
obtained free of charge contacting Wibu-Systems (support@wibu.com).
> uname -a
Linux ubuntu 5.4.0-132-generic
> cmu -v
cmu - CodeMeter Universal Support Tool.
Version 6.60 of 2017-Dec-18 (Build 2869) for Linux
Copyright (C) 2007-2017 by WIBU-SYSTEMS AG. All rights reserved.
Operating System:
Name: Ubuntu 18.04.6 LTS (Kernel 5.4.0-132-generic)
Architecture: x86_64
Current system user:
username: mjs
domain:
RunTime version information:
cmu: 6.60.2869.500 2017-12-18
CodeMeter-Service: 6.60.2869.500 2017-12-18
CodeMeterAct: 6.60.2869.500 2017-12-18
Library: 6.60.2869.500 2017-12-18
Installed file version information:
CodeMeter-Service: 6.60.2869.500 2017-12-18 (64bit)
CodeMeterCC: 6.60.2869.500 2017-12-18 (64bit)
codemeter-info: 6.60.2869.500 2017-12-18 (64bit)
cmu: 6.60.2869.500 2017-12-18 (64bit)
CM Lib (/usr/lib/i386-linux-gnu): 6.60.2869.500 2017-12-18 (32bit)
CM Lib (/usr/lib/x86_64-linux-gnu): 6.60.2869.500 2017-12-18 (64bit)
Note on libusb program library used on Linux-operating systems by
CodeMeter License Server:
The programming library serves to read and write USB devices. The code is
licensed under the GNU Lesser General Public License (LGPL) Version 2.1.
Call cmu --licensing-terms to view it.
The code of the programming library libusb can be downloaded at the project
website http://www.libusb.org/. On request the source can also be electronically
obtained free of charge contacting Wibu-Systems (support@wibu.com).
> sudo rm /var/lib/CodeMeter/CmAct/* -f
> cmu -i -f dji_aeroscope_pro.WibuCmLIF
cmu - CodeMeter Universal Support Tool.
Version 6.60 of 2017-Dec-18 (Build 2869) for Linux
Copyright (C) 2007-2017 by WIBU-SYSTEMS AG. All rights reserved.
The file contains 1 Update:
CmActLtLicense binding information: FirmCode 6000316
Execute Update ...
The file contains 1 Update:
CmActLtLicense update: Serial number 130-1021612743, FirmCode 6000316.
--> successful
1 successful update done
> cmu -c 6000316 -s130-1021612743 -f update-130-1021612743.WibuCmRaC
cmu - CodeMeter Universal Support Tool.
Version 6.60 of 2017-Dec-18 (Build 2869) for Linux
Copyright (C) 2007-2017 by WIBU-SYSTEMS AG. All rights reserved.
Write CmFAS for 130-1021612743 for FirmItem 6000316
> cp /var/lib/CodeMeter/CmAct . -r
> sudo rm /var/lib/CodeMeter/CmAct/* -f
> cmu -i -f dji_aeroscope_pro.WibuCmLIF
cmu - CodeMeter Universal Support Tool.
Version 6.60 of 2017-Dec-18 (Build 2869) for Linux
Copyright (C) 2007-2017 by WIBU-SYSTEMS AG. All rights reserved.
The file contains 1 Update:
CmActLtLicense binding information: FirmCode 6000316
Execute Update ...
The file contains 1 Update:
CmActLtLicense update: Serial number 130-1021612743, FirmCode 6000316.
--> successful
1 successful update done
> cmu -c 6000316 -s130-1021612743 -f update-130-1021612743.WibuCmRaC
cmu - CodeMeter Universal Support Tool.
Version 6.60 of 2017-Dec-18 (Build 2869) for Linux
Copyright (C) 2007-2017 by WIBU-SYSTEMS AG. All rights reserved.
Write CmFAS for 130-1021612743 for FirmItem 6000316
> cp /var/lib/CodeMeter/CmAct . -r
> python test.py
code_5001 check ok, match item_10
code_5003 check ok, match item_9
code_6001 check ok, match item_0
code_6101 check ok, match item_2
code_6103 check ok, match item_7
code_6104 check faild, not match any item
code_6105 check ok, match item_4
code_6106 check ok, match item_5
code_6107 check ok, match item_6
code_6108 check ok, match item_3
code_6109 check ok, match item_8
code_6110 check ok, match item_1
code_8001 check ok, match item_11
code_200001 check faild, not match any item
code_200002 check faild, not match any item
code_200003 check faild, not match any item
wbc id count: 12
system featue count: 16
system featue ok: 12
all wbc item check ok
part1: 2295bf3c4cdbb01a457c2955d514637074c771d7b638dbadb22a1b4a3d1a9782e661e8819f3c98945e91d7022254fc447689be8c833f732b338498e5351b32
part2: 64742897b75b86aa15e282b0b2585b7c33a11c5fc8749601d864adad327db4
part3: None
private_key: d9352ca798fde876a6c093e60bb39870ddb10e722276ab78eea3cc40
> python test.py
code_5001 check ok, match item_10
code_5003 check ok, match item_9
code_6001 check ok, match item_0
code_6101 check ok, match item_2
code_6103 check ok, match item_7
code_6104 check faild, not match any item
code_6105 check ok, match item_4
code_6106 check ok, match item_5
code_6107 check ok, match item_6
code_6108 check ok, match item_3
code_6109 check ok, match item_8
code_6110 check ok, match item_1
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