Utility classes to sign pdf files width PAdES (PDF Advanced Electronic Signature) using iText or Apache PDFBox libraries.
Before use carefully read the licenses of third-party libraries.
The library provides the following classes:
org.dew.pades.PAdESSignerIText- PAdES Signer based on iTextorg.dew.pades.PAdESSignerBox- PAdES Signer based on Apache PDFBox
PAdESSignerIText pades = new PAdESSignerIText("keystore.jks", "password", "selfsigned");
pades.sign(pdfFilePath, signedFilePath, "creator", "contact@dew.org", "reason", "location");
byte[] out = pades.sign((byte[]) in, "creator", "contact@dew.org", "reason", "location");PAdESSignerBox pades = new PAdESSignerBox("keystore.jks", "password", "selfsigned");
pades.sign(pdfFilePath, signedFilePath, "creator", "contact@dew.org", "reason", "location");
byte[] out = pades.sign((byte[]) in, "creator", "contact@dew.org", "reason", "location");public static byte[] pades(byte[] docContent) throws Exception {
String signerFolder = "C:\\prj\\dew\\pades";
String signerTarget = "C:\\prj\\dew\\pades\\target\\";
String signerLibs = "C:\\prj\\dew\\pades\\target\\dependency";
if(docContent == null) {
System.out.println("pades(null) -> null");
return null;
}
if(docContent.length == 0) {
System.out.println("pades([]) -> []");
return docContent;
}
System.out.println("pades([" + docContent.length + "])...");
String osName = System.getProperty("os.name");
if(osName == null || osName.length() == 0) osName = "Linux";
boolean windows = osName.charAt(0) == 'W' || osName.charAt(0) == 'w';
String javaHome = System.getProperty("java.home");
if(javaHome == null || javaHome.length() == 0) {
System.out.println(" Undefined java.home in properties.");
System.out.println("pades([" + docContent.length + "]) -> [" + docContent.length + "] (no signature)");
return docContent;
}
File folder = new File(signerFolder);
if(!folder.exists()) {
System.out.println(" Folder " + folder.getAbsolutePath() + " does not exist.");
System.out.println("pades([" + docContent.length + "]) -> [" + docContent.length + "] (no signature)");
return docContent;
}
File libFolder = new File(signerLibs);
if(!libFolder.exists()) {
System.out.println(" Folder " + libFolder.getAbsolutePath() + " does not exist.");
System.out.println("pades([" + docContent.length + "]) -> [" + docContent.length + "] (no signature)");
return docContent;
}
File keystore = new File(signerFolder + File.separator + "keystore.jks");
if(!keystore.exists()) {
System.out.println(" Keystore " + keystore.getAbsolutePath() + " does not exist.");
System.out.println("pades([" + docContent.length + "]) -> [" + docContent.length + "] (no signature)");
return docContent;
}
String fileName = "tmp_" + WUtil.formatDateTime(Calendar.getInstance(), "#", true);
String fileToSign = signerFolder + File.separator + fileName + ".pdf";
String fileSigned = signerFolder + File.separator + fileName + "_signed.pdf";
saveContent(docContent, fileToSign);
List<String> libraries = new ArrayList<String>();
libraries.add("commons-7.2.5.jar");
libraries.add("commons-logging-1.2.jar");
libraries.add("slf4j-api-1.7.36.jar");
libraries.add("slf4j-simple-1.7.36.jar");
libraries.add("bcpkix-jdk15on-1.70.jar");
libraries.add("bcprov-jdk15on-1.70.jar");
libraries.add("bcutil-jdk15on-1.70.jar");
libraries.add("fontbox-2.0.28.jar");
libraries.add("forms-7.2.5.jar");
libraries.add("io-7.2.5.jar");
libraries.add("kernel-7.2.5.jar");
libraries.add("layout-7.2.5.jar");
libraries.add("pdfa-7.2.5.jar");
libraries.add("pdfbox-2.0.28.jar");
libraries.add("sign-7.2.5.jar");
String appJar = signerTarget + File.separator + "pades-1.0.0.jar";
String classPath = "";
for(int i = 0; i < libraries.size(); i++) {
classPath += signerFolder + File.separator + "lib" + File.separator + libraries.get(i);
if(i < libraries.size() - 1) classPath += File.pathSeparator;
}
if(classPath.length() > 0) classPath += File.pathSeparator;
classPath += appJar;
List<String> command = new ArrayList<String>();
command.add(javaHome + File.separator + "bin" + File.separator + "java" + (windows ? ".exe" : ""));
command.add("-cp");
command.add(classPath);
command.add("org.dew.pades.PAdESSignerTools");
List<String> arguments = new ArrayList<String>();
arguments.add(fileToSign);
arguments.add(signerFolder + File.separator + "keystore.jks");
arguments.add("password");
arguments.add("key");
arguments.add("password");
arguments.add("creator");
arguments.add("test@test.com");
arguments.add("reason");
arguments.add("location");
arguments.add(fileSigned);
int p = 0;
String[] cmdarray = new String[command.size() + arguments.size()];
for(int i = 0; i < command.size(); i++) {
cmdarray[p++] = command.get(i);
}
for(int i = 0; i < arguments.size(); i++) {
cmdarray[p++] = arguments.get(i);
}
BufferedReader brI = null;
BufferedReader brE = null;
Process process = null;
try {
Runtime runtime = Runtime.getRuntime();
process = runtime.exec(cmdarray, null, folder);
brI = new BufferedReader(new InputStreamReader(process.getInputStream()));
String sLine = null;
while((sLine = brI.readLine()) != null) {
System.out.println(" " + sLine);
}
brE = new BufferedReader(new InputStreamReader(process.getErrorStream()));
while((sLine = brE.readLine()) != null) {
System.out.println(" " + sLine);
}
}
catch(Exception ex) {
ex.printStackTrace();
System.out.println("pades([" + docContent.length + "]) -> [" + docContent.length + "] (no signature)");
return docContent;
}
finally {
if(brE != null) try{ brE.close(); } catch(Exception ex) {}
if(brI != null) try{ brI.close(); } catch(Exception ex) {}
if(process != null) {
try{
process.destroy();
}
catch(Exception ex) {
}
}
}
File inpFile = new File(fileToSign);
if(inpFile.exists()) {
System.out.println(" Delete " + inpFile.getAbsolutePath() + "...");
inpFile.delete();
}
File outFile = new File(fileSigned);
if(!outFile.exists()) {
System.out.println(" File " + fileSigned + " does not exist.");
System.out.println("pades([" + docContent.length + "]) -> [" + docContent.length + "] (no signature)");
return docContent;
}
byte[] result = readFile(outFile);
System.out.println(" Delete " + outFile.getAbsolutePath() + "...");
outFile.delete();
if(result == null || result.length == 0) {
System.out.println(" readFile(" + outFile.getAbsolutePath() + ") -> empty");
System.out.println("pades([" + docContent.length + "]) -> [" + docContent.length + "] (no signature)");
return docContent;
}
System.out.println("pades([" + docContent.length + "]) -> [" + result.length + "]");
return result;
}git clone https://github.com/giosil/pades.gitmvn clean installmvn dependency:copy-dependencies