在应用程序中使用证书 [英] Using a certificate in an app

问题描述

大家好;

我在我的智能手机中安装了globalsign的数字证书。我想用它来签署PDF文件，但我不知道如何在我的Android应用程序中利用它做我的目的。有人知道怎么做，谢谢。

Hello everybody;
I installs a digital certificate from globalsign in my smartphone.I wants to use it for signing a PDF documents but i don't know how to exploit it in my android application to do my purpose .There is someone who know how to do it and thanks.

推荐答案

我努力解决问题，我找到了这个代码，但他们是一个失踪我不知道如何获取证书目录的事情。

I tried hard to solve the problem ,i found this code but they are a missing thing that i don't know how to get the directory of my certificate.

public static final boolean signPdf()
			throws IOException, DocumentException, Exception
	{
		
		String fileKey          = "???" ;
			String fileKeyPassword  = "MyPassword" ;
 
		try {
			// Creationof KeyStore
			KeyStore ks = KeyStore.getInstance("pkcs12");
			
			ks.load(new FileInputStream(fileKey), fileKeyPassword.toCharArray());
			String alias = (String)ks.aliases().nextElement();
			
			PrivateKey key = (PrivateKey)ks.getKey(alias, fileKeyPassword.toCharArray());
			
			Certificate[] chain = ks.getCertificateChain(alias);
 
			
			PdfReader pdfReader = new PdfReader((new File(fname)).getAbsolutePath());
			File outputFile = new File(fnameS);
			
			PdfStamper pdfStamper;
			pdfStamper = PdfStamper.createSignature(pdfReader, null, '\0', outputFile);
			PdfSignatureAppearance sap = pdfStamper.getSignatureAppearance();
			sap.setCrypto(key, chain, null, PdfSignatureAppearance.SELF_SIGNED);
			sap.setReason("Test SignPDF berthou.mc");
			sap.setLocation("");
			// Position du tampon sur la page (ici en bas a gauche page 1)
			sap.setVisibleSignature(new Rectangle(10, 10, 50, 30), 1, "sign_rbl");
 
			pdfStamper.setFormFlattening(true);
			pdfStamper.close();
 
			return true;
		}
		catch (Exception key) {
			throw new Exception(key);
		}
	}

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