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ExportPriv.java
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96 lines (75 loc) · 2.96 KB
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// How to export the private key from keystore?
// Does keytool not have an option to do so?
// This example use the "testkeys" file that comes with JSSE 1.0.3
// Alexey Zilber: Ported to work with Base64Coder: http://www.source-code.biz/snippets/java/2.htm
// $Id$
// $URL$
import java.security.cert.Certificate;
import java.security.*;
import java.io.File;
import java.io.FileInputStream;
import java.util.Vector;
class ExportPriv {
public static void main(String args[]) throws Exception{
if (args.length < 2) {
//Yes I know this sucks (the password is visible to other users via ps
// but this was a quick-n-dirty fix to export from a keystore to pkcs12
// someday I may fix, but for now it'll have to do.
System.err.println("Usage: java ExportPriv <keystore> <alias> <password>");
System.exit(1);
}
ExportPriv myep = new ExportPriv();
// System.out.println("Args: " + args[0] + " " + args[1] + " " + args[2]);
myep.doit(args[0], args[1], args[2]);
}
public void doit(String fileName, String aliasName, String pass) throws Exception{
KeyStore ks = KeyStore.getInstance("JKS");
char[] passPhrase = pass.toCharArray();
//BASE64Encoder myB64 = new BASE64Encoder();
File certificateFile = new File(fileName);
// System.out.println("certificateFile: " + certificateFile);
ks.load(new FileInputStream(certificateFile), passPhrase);
// System.out.println("ks: " + ks);
// for(String a : ks.aliases()) {
// System.out.println("alias: " + a);
// }
KeyPair kp = getPrivateKey(ks, aliasName, passPhrase);
// System.out.println("kp: " + kp);
PrivateKey privKey = kp.getPrivate();
char[] b64 = Base64Coder.encode(privKey.getEncoded());
System.out.println("-----BEGIN PRIVATE KEY-----");
for (String subSeq : splitArray(b64, 64)) {
System.out.println(subSeq.toCharArray());
}
System.out.println("-----END PRIVATE KEY-----");
}
// From http://javaalmanac.com/egs/java.security/GetKeyFromKs.html
public KeyPair getPrivateKey(KeyStore keystore, String alias, char[] password) {
try {
// Get private key
Key key = keystore.getKey(alias, password);
if (key instanceof PrivateKey) {
// Get certificate of public key
Certificate cert = keystore.getCertificate(alias);
// Get public key
PublicKey publicKey = cert.getPublicKey();
// Return a key pair
return new KeyPair(publicKey, (PrivateKey)key);
}
} catch (UnrecoverableKeyException e) {
} catch (NoSuchAlgorithmException e) {
} catch (KeyStoreException e) {
}
return null;
}
private Vector<String> splitArray(char[] chry, int subarrLen) {
Vector<String> result = new Vector<String>();
String input = new String(chry);
int i = 0;
while (i < chry.length) {
result.add(input.substring(i, Math.min(input.length(), i + subarrLen)));
i = i + subarrLen;
}
return result;
}
}