org.bouncycastle.asn1.pkcs.RSAPublicKey Java Examples

The following examples show how to use org.bouncycastle.asn1.pkcs.RSAPublicKey. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: BouncyCastleV1CryptoProvider.java    From paseto with MIT License 6 votes vote down vote up 
@Override
public KeyPair rsaGenerate() {
	RSAKeyPairGenerator keyGen = new RSAKeyPairGenerator();
	keyGen.init(new RSAKeyGenerationParameters(E, new SecureRandom(), RSA_KEY_SIZE,
			PrimeCertaintyCalculator.getDefaultCertainty(RSA_KEY_SIZE)));
	AsymmetricCipherKeyPair pair = keyGen.generateKeyPair();

	RSAKeyParameters pub = (RSAKeyParameters) pair.getPublic();
	RSAPrivateCrtKeyParameters priv = (RSAPrivateCrtKeyParameters) pair.getPrivate();

	// As in BCRSAPrivateKey / BCRSAPublicKey
	AlgorithmIdentifier algo = new AlgorithmIdentifier(PKCSObjectIdentifiers.rsaEncryption, DERNull.INSTANCE);
	byte[] publicKey = KeyUtil.getEncodedSubjectPublicKeyInfo(algo, new RSAPublicKey(pub.getModulus(),
			pub.getExponent()));
	byte[] privateKey = KeyUtil.getEncodedPrivateKeyInfo(algo, new RSAPrivateKey(priv.getModulus(),
			priv.getPublicExponent(), priv.getExponent(), priv.getP(), priv.getQ(), priv.getDP(), priv.getDQ(),
			priv.getQInv()));

	return new KeyPair(privateKey, publicKey);
}
Example #2
Source File: TlsHelper.java    From nifi with Apache License 2.0 6 votes vote down vote up 
/**
 * Returns a {@link PEMKeyPair} object with direct access to the public and private keys given a PKCS #8 private key.
 *
 * @param privateKeyInfo the PKCS #8 private key info
 * @return the PKCS #1 public and private key pair
 * @throws IOException if there is an error converting the key pair
 */
private static PEMKeyPair convertPrivateKeyFromPKCS8ToPKCS1(PrivateKeyInfo privateKeyInfo) throws IOException {
    // Parse the key wrapping to determine the internal key structure
    ASN1Encodable asn1PrivateKey = privateKeyInfo.parsePrivateKey();

    // Convert the parsed key to an RSA private key
    RSAPrivateKey keyStruct = RSAPrivateKey.getInstance(asn1PrivateKey);

    // Create the RSA public key from the modulus and exponent
    RSAPublicKey pubSpec = new RSAPublicKey(
        keyStruct.getModulus(), keyStruct.getPublicExponent());

    // Create an algorithm identifier for forming the key pair
    AlgorithmIdentifier algId = new AlgorithmIdentifier(PKCSObjectIdentifiers.rsaEncryption, DERNull.INSTANCE);
    if (isVerbose()) {
        logger.info("Converted private key from PKCS #8 to PKCS #1 RSA private key");
    }

    // Create the key pair container
    return new PEMKeyPair(new SubjectPublicKeyInfo(algId, pubSpec), new PrivateKeyInfo(algId, keyStruct));
}
Example #3
Source File: KeyCodec.java    From UAF with Apache License 2.0 5 votes vote down vote up 
public static PublicKey getRSAPublicKey(byte[] encodedPubKey) throws IOException, NoSuchAlgorithmException, InvalidKeySpecException {
	RSAPublicKey pubKey8 = RSAPublicKey.getInstance(encodedPubKey);
	SubjectPublicKeyInfo info = SubjectPublicKeyInfoFactory.createSubjectPublicKeyInfo(new RSAKeyParameters(false, pubKey8.getModulus(), pubKey8.getPublicExponent()));
	X509EncodedKeySpec spec = new X509EncodedKeySpec(info.getEncoded());
	KeyFactory keyFactory = KeyFactory.getInstance("RSA");
	return keyFactory.generatePublic(spec);
}
Example #4
Source File: P12KeyGenerator.java    From xipki with Apache License 2.0 5 votes vote down vote up 
private KeyPairWithSubjectPublicKeyInfo genRSAKeypair(int keysize,
    BigInteger publicExponent, SecureRandom random) throws Exception {
  KeyPair kp = KeyUtil.generateRSAKeypair(keysize, publicExponent, random);
  java.security.interfaces.RSAPublicKey rsaPubKey =
      (java.security.interfaces.RSAPublicKey) kp.getPublic();

  SubjectPublicKeyInfo spki = new SubjectPublicKeyInfo(
      new AlgorithmIdentifier(PKCSObjectIdentifiers.rsaEncryption, DERNull.INSTANCE),
      new RSAPublicKey(rsaPubKey.getModulus(), rsaPubKey.getPublicExponent()));
  return new KeyPairWithSubjectPublicKeyInfo(kp, spki);
}
Example #5
Source File: MyUtil.java    From xipki with Apache License 2.0 5 votes vote down vote up 
public static SubjectPublicKeyInfo createSubjectPublicKeyInfo(PublicKey publicKey)
    throws IOException {
  Args.notNull(publicKey, "publicKey");
  if (publicKey instanceof java.security.interfaces.RSAPublicKey) {
    java.security.interfaces.RSAPublicKey rsaPubKey =
        (java.security.interfaces.RSAPublicKey) publicKey;
    return new SubjectPublicKeyInfo(ALGID_RSA,
        new RSAPublicKey(rsaPubKey.getModulus(), rsaPubKey.getPublicExponent()));
  } else {
    throw new IllegalArgumentException("unsupported public key " + publicKey);
  }
}