Created
April 27, 2015 10:51
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public static void main( | |
String args[]) | |
throws Exception | |
{ | |
if (args.length != 2) | |
{ | |
System.err.println("usage: CreateEncryptedMail pkcs12Keystore password"); | |
System.exit(0); | |
} | |
// | |
// Open the key store | |
// | |
KeyStore ks = KeyStore.getInstance("PKCS12", "BC"); | |
ks.load(new FileInputStream(args[0]), args[1].toCharArray()); | |
Enumeration e = ks.aliases(); | |
String keyAlias = null; | |
while (e.hasMoreElements()) | |
{ | |
String alias = (String)e.nextElement(); | |
if (ks.isKeyEntry(alias)) | |
{ | |
keyAlias = alias; | |
} | |
} | |
if (keyAlias == null) | |
{ | |
System.err.println("can't find a private key!"); | |
System.exit(0); | |
} | |
Certificate[] chain = ks.getCertificateChain(keyAlias); | |
// | |
// create the generator for creating an smime/encrypted message | |
// | |
SMIMEEnvelopedGenerator gen = new SMIMEEnvelopedGenerator(); | |
gen.addKeyTransRecipient((X509Certificate)chain[0]); | |
// | |
// create a subject key id - this has to be done the same way as | |
// it is done in the certificate associated with the private key | |
// version 3 only. | |
// | |
/* | |
MessageDigest dig = MessageDigest.getInstance("SHA1", "BC"); | |
dig.update(cert.getPublicKey().getEncoded()); | |
gen.addKeyTransRecipient(cert.getPublicKey(), dig.digest()); | |
*/ | |
// | |
// create the base for our message | |
// | |
MimeBodyPart msg = new MimeBodyPart(); | |
msg.setText("Hello world!"); | |
MimeBodyPart mp = gen.generate(msg, SMIMEEnvelopedGenerator.RC2_CBC, "BC"); | |
// | |
// Get a Session object and create the mail message | |
// | |
Properties props = System.getProperties(); | |
Session session = Session.getDefaultInstance(props, null); | |
Address fromUser = new InternetAddress("\"Eric H. Echidna\"<eric@bouncycastle.org>"); | |
Address toUser = new InternetAddress("example@bouncycastle.org"); | |
MimeMessage body = new MimeMessage(session); | |
body.setFrom(fromUser); | |
body.setRecipient(Message.RecipientType.TO, toUser); | |
body.setSubject("example encrypted message"); | |
body.setContent(mp.getContent(), mp.getContentType()); | |
body.saveChanges(); | |
body.writeTo(new FileOutputStream("encrypted.message")); | |
} |
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