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POGenerating X509Certificate with BouncyCastle with Java
 

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  1. POGenerating X509Certificate with BouncyCastle with Java
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    <p>This is what I have right now to generate a digital certificate. And now I'm able to generate a digital certificate with password protected for private key.</p> <pre><code>public static void main(String[] args) throws Exception { Security.addProvider(new BouncyCastleProvider()); testKeyStore(); } public static void testKeyStore() throws Exception { try { String storeName = "d://suresh_test.cer"; java.security.KeyPairGenerator keyPairGenerator = KeyPairGenerator .getInstance("RSA"); keyPairGenerator.initialize(2048); KeyPair keyPair = keyPairGenerator.generateKeyPair(); PublicKey publicKey = keyPair.getPublic(); PrivateKey privateKey = keyPair.getPrivate(); X509Certificate trustCert = createCertificate("CN=CA", "CN=CA", publicKey, privateKey); java.security.cert.Certificate[] outChain = { createCertificate("CN=Client", "CN=CA", publicKey, privateKey), trustCert }; KeyStore outStore = KeyStore.getInstance("PKCS12"); outStore.load(null, "suresh_".toCharArray()); outStore.setKeyEntry("mykey", privateKey, "suresh_".toCharArray(), outChain); OutputStream outputStream = new FileOutputStream(storeName); outStore.store(outputStream, "suresh_".toCharArray()); outputStream.flush(); outputStream.close(); KeyStore inStore = KeyStore.getInstance("PKCS12"); inStore.load(new FileInputStream(storeName), "suresh_".toCharArray()); } catch (Exception e) { e.printStackTrace(); throw new AssertionError(e.getMessage()); } } private static X509Certificate createCertificate(String dn, String issuer, PublicKey publicKey, PrivateKey privateKey) throws Exception { X509V3CertificateGenerator certGenerator = new X509V3CertificateGenerator(); certGenerator.setSerialNumber(BigInteger.valueOf(Math.abs(new Random() .nextLong()))); certGenerator.setIssuerDN(new X509Name(dn)); certGenerator.setSubjectDN(new X509Name(dn)); certGenerator.setIssuerDN(new X509Name(issuer)); // Set issuer! certGenerator.setNotBefore(Calendar.getInstance().getTime()); certGenerator.setNotAfter(Calendar.getInstance().getTime()); certGenerator.setPublicKey(publicKey); certGenerator.setSignatureAlgorithm("SHA1WithRSAEncryption"); X509Certificate certificate = (X509Certificate) certGenerator.generate( privateKey, "BC"); return certificate; } </code></pre> <p>How to make it Self sign ?</p> <p>I have no clues.</p> <p>How can I proceed for that ?</p> <p>Thanks for any hints.</p>
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      1. POGenerating X509Certificate with BouncyCastle with Java
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    1. COYour question doesn't explain what you've done to try and solve the problem; it currently reads like a request for code. Please share your attempted implementation and explain how it fails to meet your requirements.
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      1. USDuncan Jones
    2. CO@DuncanJones Well, I generated the certificate. But don't know how to sign it using bouncy castle API, haven't found any thing in their website. Thanks for the help.
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