Add "export private key" feature

include/libgourou.h

@@ -164,6 +164,8 @@ namespace gourou
 	 */
 	std::string serializeRSAPrivateKey(void* rsa);
 
+	void exportPrivateLicenseKey(std::string path);
+	
 	/**
 	 * @brief Get current user
 	 */

src/libgourou.cpp

@@ -899,6 +899,19 @@ namespace gourou
 	return res.toBase64();
     }
 
+    void DRMProcessor::exportPrivateLicenseKey(std::string path)
+    {
+	int fd = open(path.c_str(), O_CREAT|O_TRUNC|O_WRONLY, S_IRWXU);
+	if (fd <= 0)
+	    EXCEPTION(GOUROU_FILE_ERROR, "Unable to open " << path);
+
+	ByteArray privateLicenseKey = ByteArray::fromBase64(user->getPrivateLicenseKey());
+	/* In adobekey.py, we get base64 decoded data [26:] */
+	write(fd, privateLicenseKey.data()+26, privateLicenseKey.length()-1-26);
+	
+	close(fd);
+    }
+
     int DRMProcessor::getLogLevel() {return (int)gourou::logLevel;}
     void DRMProcessor::setLogLevel(int logLevel) {gourou::logLevel = (GOUROU_LOG_LEVEL)logLevel;}
 }

utils/acsmdownloader.cpp

@@ -46,6 +46,7 @@ static const char* deviceFile     = "device.xml";
 static const char* activationFile = "activation.xml";
 static const char* devicekeyFile  = "devicesalt";
 static const char* acsmFile       = 0;
+static       bool  exportPrivateKey = false;
 static const char* outputFile     = 0;
 static const char* outputDir      = 0;
 static const char* defaultDirs[]  = {
@@ -71,7 +72,29 @@ public:
 	{
 	    DRMProcessorClientImpl client;
 	    gourou::DRMProcessor processor(&client, deviceFile, activationFile, devicekeyFile);
+	    gourou::User* user = processor.getUser();
 	    
+	    if (exportPrivateKey)
+	    {
+		std::string filename;
+		if (!outputFile)
+		    filename = std::string("Adobe_PrivateLicenseKey--") + user->getUsername() + ".der";
+	    
+		if (outputDir)
+		{
+		    QDir dir(outputDir);
+		    if (!dir.exists(outputDir))
+			dir.mkpath(outputDir);
+		    
+		    filename = std::string(outputDir) + "/" + filename;
+		}
+
+		processor.exportPrivateLicenseKey(filename);
+
+		std::cout << "Private license key exported to " << filename << std::endl;
+	    }
+	    else
+	    {
 		gourou::FulfillmentItem* item = processor.fulfill(acsmFile);
 
 		std::string filename;
@@ -107,6 +130,7 @@ public:
 		    filename = finalName;
 		}
 		std::cout << "Created " << filename << std::endl;
+	    }
 	} catch(std::exception& e)
 	{
 	    std::cout << e.what() << std::endl;
@@ -149,14 +173,15 @@ static void usage(const char* cmd)
 {
     std::cout << "Download EPUB file from ACSM request file" << std::endl;
     
-    std::cout << "Usage: " << cmd << " [(-d|--device-file) device.xml] [(-a|--activation-file) activation.xml] [(-s|--device-key-file) devicesalt] [(-O|--output-dir) dir] [(-o|--output-file) output.epub] [(-v|--verbose)] [(-h|--help)] (-f|--acsm-file) file.acsm" << std::endl << std::endl;
+    std::cout << "Usage: " << cmd << " [(-d|--device-file) device.xml] [(-a|--activation-file) activation.xml] [(-s|--device-key-file) devicesalt] [(-O|--output-dir) dir] [(-o|--output-file) output(.epub|.pdf|.der)] [(-v|--verbose)] [(-h|--help)] (-f|--acsm-file) file.acsm|(-e|--export-private-key)" << std::endl << std::endl;
     
     std::cout << "  " << "-d|--device-file"     << "\t"   << "device.xml file from eReader" << std::endl;
     std::cout << "  " << "-a|--activation-file" << "\t"   << "activation.xml file from eReader" << std::endl;
     std::cout << "  " << "-k|--device-key-file" << "\t"   << "private device key file (eg devicesalt/devkey.bin) from eReader" << std::endl;
     std::cout << "  " << "-O|--output-dir"      << "\t"   << "Optional output directory were to put result (default ./)" << std::endl;
-    std::cout << "  " << "-o|--output-file"     << "\t"   << "Optional output epub filename (default <title.epub>)" << std::endl;
+    std::cout << "  " << "-o|--output-file"     << "\t"   << "Optional output filename (default <title.(epub|pdf|der)>)" << std::endl;
     std::cout << "  " << "-f|--acsm-file"       << "\t"   << "ACSM request file for epub download" << std::endl;
+    std::cout << "  " << "-e|--export-private-key"<< "\t" << "Export private key in DER format" << std::endl;
     std::cout << "  " << "-v|--verbose"         << "\t\t" << "Increase verbosity, can be set multiple times" << std::endl;
     std::cout << "  " << "-V|--version"         << "\t\t" << "Display libgourou version" << std::endl;
     std::cout << "  " << "-h|--help"            << "\t\t" << "This help" << std::endl;
@@ -185,13 +210,14 @@ int main(int argc, char** argv)
 	    {"output-dir",       required_argument, 0,  'O' },
 	    {"output-file",      required_argument, 0,  'o' },
 	    {"acsm-file",        required_argument, 0,  'f' },
+	    {"export-private-key",no_argument,      0,  'e' },
 	    {"verbose",          no_argument,       0,  'v' },
 	    {"version",          no_argument,       0,  'V' },
 	    {"help",             no_argument,       0,  'h' },
 	    {0,                  0,                 0,  0 }
 	};
 
-	c = getopt_long(argc, argv, "d:a:k:O:o:f:vVh",
+	c = getopt_long(argc, argv, "d:a:k:O:o:f:evVh",
                         long_options, &option_index);
 	if (c == -1)
 	    break;
@@ -215,6 +241,9 @@ int main(int argc, char** argv)
 	case 'o':
 	    outputFile = optarg;
 	    break;
+	case 'e':
+	    exportPrivateKey = true;
+	    break;
 	case 'v':
 	    verbose++;
 	    break;
@@ -232,7 +261,7 @@ int main(int argc, char** argv)
    
     gourou::DRMProcessor::setLogLevel(verbose);
 
-    if (!acsmFile || (outputDir && !outputDir[0]) ||
+    if ((!acsmFile && !exportPrivateKey) || (outputDir && !outputDir[0]) ||
 	(outputFile && !outputFile[0]))
     {
 	usage(argv[0]);
@@ -254,6 +283,16 @@ int main(int argc, char** argv)
 	}
     }
 
+    if (exportPrivateKey)
+    {
+	if (acsmFile)
+	{
+	    usage(argv[0]);
+	    return -1;
+	}
+    }
+    else
+    {
 	QFile file(acsmFile);
 	if (!file.exists())
 	{
@@ -261,6 +300,7 @@ int main(int argc, char** argv)
 	    ret = -1;
 	    goto end;
 	}
+    }
     
     QThreadPool::globalInstance()->start(&downloader);