Example usage for java.security.interfaces RSAPublicKey getModulus

Introduction

In this page you can find the example usage for java.security.interfaces RSAPublicKey getModulus.

Prototype

public BigInteger getModulus();

Source Link

Document

Returns the modulus.

Usage

From source file:org.excalibur.core.util.SecurityUtils2.java

public static String getFingerPrint(RSAPublicKey key) throws IOException {
    try (ByteArrayOutputStream buf = new ByteArrayOutputStream()) {
        write(key.getPublicExponent().toByteArray(), buf);
        write(key.getModulus().toByteArray(), buf);

        return getFingerPrint(buf.toByteArray());
    }/*w w  w . ja v a 2  s  .c o m*/
}

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From source file:org.xdi.oxauth.cert.fingerprint.FingerprintHelper.java

private static byte[] getDerEncoding(RSAPublicKey key) throws IOException {
    ByteArrayOutputStream buffer = new ByteArrayOutputStream();
    DataOutputStream dataOutput = new DataOutputStream(buffer);
    writeDataWithLength("ssh-rsa".getBytes(), dataOutput);
    writeDataWithLength(key.getPublicExponent().toByteArray(), dataOutput);
    writeDataWithLength(key.getModulus().toByteArray(), dataOutput);

    return buffer.toByteArray();
}

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From source file:com.axelor.apps.account.ebics.certificate.KeyUtil.java

/**
 * Returns the digest value of a given public key.
 * //from   ww w. j ava  2 s. c om
 * 
 * <p>In Version H003? of the EBICS protocol the ES of the financial:
 * 
 * <p>The SHA-256 hash values of the financial institution's public keys for X002 and E002 are
 * composed by concatenating the exponent with a blank character and the modulus in hexadecimal
 * representation (using lower case letters) without leading zero (as to the hexadecimal
 * representation). The resulting string has to be converted into a byte array based on US ASCII
 * code.
 * 
 * @param publicKey the public key
 * @return the digest value
 * @throws EbicsException
 */
public static byte[] getKeyDigest(RSAPublicKey publicKey) throws AxelorException {
    String modulus;
    String exponent;
    String hash;
    byte[] digest;

    exponent = Hex.encodeHexString(publicKey.getPublicExponent().toByteArray());
    modulus = Hex.encodeHexString(removeFirstByte(publicKey.getModulus().toByteArray()));
    hash = exponent + " " + modulus;

    if (hash.charAt(0) == '0') {
        hash = hash.substring(1);
    }

    try {
        digest = MessageDigest.getInstance("SHA-256", "BC").digest(hash.getBytes("US-ASCII"));
    } catch (GeneralSecurityException e) {
        throw new AxelorException(e.getMessage(), IException.CONFIGURATION_ERROR);
    } catch (UnsupportedEncodingException e) {
        throw new AxelorException(e.getMessage(), IException.CONFIGURATION_ERROR);
    }

    return new String(Hex.encodeHex(digest, false)).getBytes();
}

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From source file:org.kopi.ebics.certificate.KeyUtil.java

/**
 * Returns the digest value of a given public key.
 * /*from  w w  w.jav a  2  s .  co  m*/
 * 
 * <p>In Version H003? of the EBICS protocol the ES of the financial:
 * 
 * <p>The SHA-256 hash values of the financial institution's public keys for X002 and E002 are
 * composed by concatenating the exponent with a blank character and the modulus in hexadecimal
 * representation (using lower case letters) without leading zero (as to the hexadecimal
 * representation). The resulting string has to be converted into a byte array based on US ASCII
 * code.
 * 
 * @param publicKey the public key
 * @return the digest value
 * @throws EbicsException
 */
public static byte[] getKeyDigest(RSAPublicKey publicKey) throws EbicsException {
    String modulus;
    String exponent;
    String hash;
    byte[] digest;

    exponent = Hex.encodeHexString(publicKey.getPublicExponent().toByteArray());
    modulus = Hex.encodeHexString(removeFirstByte(publicKey.getModulus().toByteArray()));
    hash = exponent + " " + modulus;

    if (hash.charAt(0) == '0') {
        hash = hash.substring(1);
    }

    try {
        digest = MessageDigest.getInstance("SHA-256", "BC").digest(hash.getBytes("US-ASCII"));
    } catch (GeneralSecurityException e) {
        throw new EbicsException(e.getMessage());
    } catch (UnsupportedEncodingException e) {
        throw new EbicsException(e.getMessage());
    }

    return new String(Hex.encodeHex(digest, false)).getBytes();
}

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From source file:org.excalibur.core.util.SecurityUtils2.java

public static byte[] encode(RSAPublicKey key) throws IOException {
    try (ByteArrayOutputStream buf = new ByteArrayOutputStream()) {
        write(PUBLIC_KEY_SSH_RSA_NAME, buf);
        write(key.getPublicExponent().toByteArray(), buf);
        write(key.getModulus().toByteArray(), buf);

        return buf.toByteArray();
    }/*  w ww  .j  a v a2 s .  c om*/
}

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From source file:VerifyDescriptors.java

private static String determineKeyHash(String key) throws Exception {
    PEMReader pemReader = new PEMReader(new StringReader(key));
    RSAPublicKey dirIdentityKey = (RSAPublicKey) pemReader.readObject();
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    new ASN1OutputStream(baos)
            .writeObject(new org.bouncycastle.asn1.pkcs.RSAPublicKey(dirIdentityKey.getModulus(),
                    dirIdentityKey.getPublicExponent()).toASN1Primitive());
    byte[] pkcs = baos.toByteArray();
    byte[] dirIdentityKeyHashBytes = new byte[20];
    SHA1Digest sha1 = new SHA1Digest();
    sha1.update(pkcs, 0, pkcs.length);/* w w  w  . j  ava 2  s.  c o m*/
    sha1.doFinal(dirIdentityKeyHashBytes, 0);
    String keyHash = Hex.encodeHexString(dirIdentityKeyHashBytes);
    return keyHash;
}

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From source file:org.kaaproject.kaa.common.endpoint.security.KeyUtil.java

/**
 * Validates RSA public and private key.
 *
 * @param keyPair the keypair//ww w .  ja v a 2 s  . co  m
 * @return true if keys matches
 */
public static boolean validateKeyPair(KeyPair keyPair) {
    RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
    RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();

    if (publicKey.getModulus().bitLength() != privateKey.getModulus().bitLength()) {
        LOG.error("Keypair length matching error");
        return false;
    }

    byte[] rawPayload = new byte[64];
    new Random().nextBytes(rawPayload);

    MessageEncoderDecoder encDec = new MessageEncoderDecoder(privateKey, publicKey);
    byte[] encodedPayload;
    byte[] decodedPayload;
    try {
        encodedPayload = encDec.encodeData(rawPayload);
        decodedPayload = encDec.decodeData(encodedPayload);
    } catch (GeneralSecurityException ex) {
        LOG.error("Validation keypair error ", ex);
        return false;
    }
    return Arrays.equals(rawPayload, decodedPayload);
}

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From source file:de.pawlidi.openaletheia.generator.KeyGenerator.java

public static boolean flushPublicKeySpec(final String directory, RSAPublicKey publicKey) {
    if (StringUtils.isBlank(directory) || !new File(directory).isDirectory() || publicKey == null) {
        return false;
    }/*  w  ww  .jav  a 2 s. c  om*/
    return writeKeySpec(new File(directory, PUBLIC_KEYSPEC_FILE), publicKey.getModulus(),
            publicKey.getPublicExponent());

}

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From source file:com.github.aynu.mosir.core.standard.util.SecurityHelper.java

/**
 * RSA???/*from   w  ww  .j a  v  a  2  s.  co m*/
 * <dl>
 * <dt>?
 * <dd>RSA??????2048??????
 * </dl>
 * @return RSA?
 */
public static KeyPair createKeyPair() {
    try {
        final KeyPairGenerator generator = KeyPairGenerator.getInstance(ALGO_KEY);
        generator.initialize(2048);
        final KeyPair pair = generator.generateKeyPair();
        if (LOG.isDebugEnabled()) {
            final RSAPublicKey publicKey = (RSAPublicKey) pair.getPublic();
            final RSAPrivateKey privateKey = (RSAPrivateKey) pair.getPrivate();
            LOG.debug("public-modulus={}", Base64.encodeBase64String(publicKey.getModulus().toByteArray()));
            LOG.debug("public-exponent={}",
                    Base64.encodeBase64String(publicKey.getPublicExponent().toByteArray()));
            LOG.debug("private-modulus={}", Base64.encodeBase64String(privateKey.getModulus().toByteArray()));
            LOG.debug("private-exponent={}",
                    Base64.encodeBase64String(privateKey.getPrivateExponent().toByteArray()));
        }
        return pair;
    } catch (final NoSuchAlgorithmException e) {
        throw new StandardRuntimeException(e);
    }
}

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From source file:com.github.aynu.yukar.framework.util.SecurityHelper.java

/**
 * RSA???/*  w  ww.j  ava2s  .  c o  m*/
 * <dl>
 * <dt>?
 * <dd>RSA??????2048??????
 * </dl>
 * @return RSA?
 */
public static KeyPair createKeyPair() {
    try {
        final KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");
        generator.initialize(2048);
        final KeyPair pair = generator.generateKeyPair();
        if (LOG.isDebugEnabled()) {
            final RSAPublicKey publicKey = (RSAPublicKey) pair.getPublic();
            final RSAPrivateKey privateKey = (RSAPrivateKey) pair.getPrivate();
            LOG.debug("public-modulus={}", Base64.encodeBase64String(publicKey.getModulus().toByteArray()));
            LOG.debug("public-exponent={}",
                    Base64.encodeBase64String(publicKey.getPublicExponent().toByteArray()));
            LOG.debug("private-modulus={}", Base64.encodeBase64String(privateKey.getModulus().toByteArray()));
            LOG.debug("private-exponent={}",
                    Base64.encodeBase64String(privateKey.getPrivateExponent().toByteArray()));
        }
        return pair;
    } catch (final NoSuchAlgorithmException e) {
        throw new StandardRuntimeException(e);
    }
}

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