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Java Generate And Saving Keys



Java

  1. Java Generate And Saving Keys Free
  2. Java Generate And Saving Keys Free
  3. Java Generate And Saving Keys Download
  4. Java Generate And Saving Keys Lyrics
gistfile1.java

How to use keystore in Java to store private key? Private keys must be encrypted when you store them on disk. Do not use it as is. Java: How can I generate. Java, PKCS12, keystore, tutorial.PKCS12 is an active file format for storing cryptography objects as a single file. It can be used to store secret key, private key and certificate.It is a standardized format published by RSA LaboratoPixelstech, this page is to provide vistors information of the most updated technology information around the world.

Java Generate And Saving Keys Free

importjava.security.KeyPairGenerator;
importjava.security.KeyPair;
importjava.security.PrivateKey;
importjava.security.PublicKey;
importjava.security.KeyFactory;
importjava.security.spec.EncodedKeySpec;
importjava.security.spec.PKCS8EncodedKeySpec;
importjava.security.spec.X509EncodedKeySpec;
importjava.security.spec.InvalidKeySpecException;
importjava.security.NoSuchAlgorithmException;
importcom.sun.jersey.core.util.Base64;
publicclassGeneratePublicPrivateKeys {
privatestaticvoidgenerateKeys(StringkeyAlgorithm, intnumBits) {
try {
// Get the public/private key pair
KeyPairGenerator keyGen =KeyPairGenerator.getInstance(keyAlgorithm);
keyGen.initialize(numBits);
KeyPair keyPair = keyGen.genKeyPair();
PrivateKey privateKey = keyPair.getPrivate();
PublicKey publicKey = keyPair.getPublic();
System.out.println('n'+'Generating key/value pair using '+ privateKey.getAlgorithm() +' algorithm');
// Get the bytes of the public and private keys
byte[] privateKeyBytes = privateKey.getEncoded();
byte[] publicKeyBytes = publicKey.getEncoded();
// Get the formats of the encoded bytes
String formatPrivate = privateKey.getFormat(); // PKCS#8
String formatPublic = publicKey.getFormat(); // X.509
System.out.println('Private Key : '+Base64.encode(String.valueOf(privateKeyBytes)));
System.out.println('Public Key : '+Base64.encode(String.valueOf(publicKeyBytes)));
// The bytes can be converted back to public and private key objects
KeyFactory keyFactory =KeyFactory.getInstance(keyAlgorithm);
EncodedKeySpec privateKeySpec =newPKCS8EncodedKeySpec(privateKeyBytes);
PrivateKey privateKey2 = keyFactory.generatePrivate(privateKeySpec);
EncodedKeySpec publicKeySpec =newX509EncodedKeySpec(publicKeyBytes);
PublicKey publicKey2 = keyFactory.generatePublic(publicKeySpec);
// The original and new keys are the same
System.out.println(' Are both private keys equal? '+ privateKey.equals(privateKey2));
System.out.println(' Are both public keys equal? '+ publicKey.equals(publicKey2));
} catch (InvalidKeySpecException specException) {
System.out.println('Exception');
System.out.println('Invalid Key Spec Exception');
} catch (NoSuchAlgorithmException e) {
System.out.println('Exception');
System.out.println('No such algorithm: '+ keyAlgorithm);
}
}
publicstaticvoidmain(String[] args) {
// Generate a 1024-bit Digital Signature Algorithm (DSA) key pair
generateKeys('DSA', 1024);
// Generate a 576-bit DH key pair
generateKeys('DH', 576);
// Generate a 1024-bit RSA key pair
generateKeys('RSA', 1024);
}
}

commented Mar 14, 2018

Java Generate And Saving Keys Free

Java

Java Generate And Saving Keys Download

Hi

You post is interestnig , is there away I can create a privatre key instance via a signature given stiring?

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I have pub/private keys generated already

KeyPairGenerator keyPairGenerator is going to createa key pair, but in my case I alrady have it and then further want to use them for signign.

e.g

//ecdsaSign.initSign(keyPair.getPrivate());
byte[] pkInfo = '51114cac71a9575bc1b39104d176a39d81bd1a705b9a1ad32efd2222f13e59ad'.getBytes();
// PrivateKey pvtKey = DSAPrivateKey <<<<< create a private key here via above string. instead of keyPair created above.
ecdsaSign.initSign(pvtKey);
//byte[] publicKeyBytes = keyPair.getPublic().getEncoded();
byte[] publicKeyBytes = '025fe2d166a5a8ff005eb0c799a474174f5d061de266438c69d36c2032c6bff51a'.getBytes();

Java Generate And Saving Keys Lyrics

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