Refine plugin example with get_license_code

plugins/README.rst

@@ -9,54 +9,47 @@ There are 2 files in this plugin::
 
     extra_hdinfo.c
     check_multi_mac.py
-    
-First build dynamic library `extra_hdinfo.so` used to get all mac
-addresses::
-
-    gcc -shared -o extra_hdinfo.so -fPIC extra_hdinfo.c
 
 The dynamic library `extra_hdinfo.so` exports one function
 `get_multi_mac` which could get all the mac addresses.
 
-The script `check_multi_mac.py` will call `get_multi_mac` in the
-dynamic library `extra_hdinfo.so` by `ctypes`, and then check whether
-it's expected.
-
-Run the following command to get all mac addresses in target machine::
-
-    gcc -DAPP -o hdinfo extra_hdinfo.c
-    ./hdinfo
-
-Edit the file `check_multi_mac.py`, replace the value of
-`expected_mac_addresses` got above.
+The script `check_multi_mac.py` will get the multiple mac address by
+calling `get_multi_mac` in the dynamic library `extra_hdinfo.so`, then
+compare the expected mac address saved in the `license.lic` of the
+obfuscated scripts, check whether it's expected.
 
 It will also check the file `extra_hdinfo.so` to be sure it's not
 changed by someone else.
 
+First build dynamic library `extra_hdinfo.so` used to get all mac
+addresses::
+
+    gcc -shared -o extra_hdinfo.so -fPIC extra_hdinfo.c
+
 Get sha384 of `extra_hdinfo.so`::
 
     sha384sum extra_hdinfo.so
 
 Edit the file `check_multi_mac.py`, replace the value of
 `lib_hdinfo_checksum` got above.
 
-Now edit the entry script `foo.py`, insert two comment lines::
+Next edit the entry script `foo.py`, insert two comment lines::
 
     import logging
     import sys
-    
+
     # {PyArmor Plugins}
-    
+
     def main():
         # PyArmor Plugin: check_multi_mac()
         logging.info("Hello World!")
-    
-    
+
+
     if __name__ == '__main__':
         logging.basicConfig(level=logging.INFO)
         main()
-      
-Finally, obfuscate the script with this plugin::
+
+Now, obfuscate the script with this plugin::
 
     pyarmor obfuscate --plugin check_multi_mac foo.py
 
@@ -75,6 +68,18 @@ If the plugin file isn’t in the current path, use absolute path instead::
 
     pyarmor obfuscate --plugin /path/to/check_multi_mac foo.py
 
+The last step is to generate the license file for the obfuscated script.
+
+1. Run the following command to get all mac addresses in target machine::
+
+    gcc -DAPP -o hdinfo extra_hdinfo.c
+    ./hdinfo
+
+2. Generate the license file and copy it to dist path::
+
+    pyarmor licenses 70:f1:a1:23:f0:94.08:00:27:51:d9:fe
+    cp licenses/70:f1:a1:23:f0:94.08:00:27:51:d9:fe/license.lic ./dist
+
 Distributing the obfuscated scripts to target machine:
 
 * Copy all the files in the `dist` path to target machine

plugins/check_multi_mac.py

@@ -1,9 +1,10 @@
 from hashlib import sha384
 from ctypes import cdll, c_char
+from pytransform import get_license_code
 
 lib_hdinfo_filename = "/usr/lib/extra_hdinfo.so"
 lib_hdinfo_checksum = "7838938a424b273c1e9782a1f1aebe3b70421d83a73a091e2502a5206931f0a58c7dee1d4d2d0e313ae6b992f5fa865d"
-expected_mac_addresses = "00:16:3e:08:20:b4,70:f1:a1:23:f0:94"
+expected_mac_addresses = get_license_code()
 
 
 def _check_lib_hdinfo():

plugins/extra_hdinfo.c

@@ -28,7 +28,7 @@ query_interface_mac_address(int sock, char *buf, unsigned int size)
         return -1;
       }
 
-      snprintf(buf + j * 18, size, "%02x:%02x:%02x:%02x:%02x:%02x,",
+      snprintf(buf + j * 18, size, "%02x:%02x:%02x:%02x:%02x:%02x.",
                (unsigned char)req[0].ifr_hwaddr.sa_data[0],
                (unsigned char)req[0].ifr_hwaddr.sa_data[1],
                (unsigned char)req[0].ifr_hwaddr.sa_data[2],