Examples with Signature java.security.Signature used on opensource projects

Example 66 with Signature

use of java.security.Signature in project jdk8u_jdk by JetBrains.

the class SignatureTest method checkSignature.

private static void checkSignature(byte[] data, PublicKey pub, PrivateKey priv, String sigalg) throws NoSuchAlgorithmException, InvalidKeyException, SignatureException, NoSuchProviderException {
    Signature sig = Signature.getInstance(sigalg, PROVIDER);
    sig.initSign(priv);
    for (int i = 0; i < UPDATE_TIMES_HUNDRED; i++) {
        sig.update(data);
    }
    byte[] signedData = sig.sign();
    // Make sure signature verifies with original data
    sig.initVerify(pub);
    for (int i = 0; i < UPDATE_TIMES_HUNDRED; i++) {
        sig.update(data);
    }
    if (!sig.verify(signedData)) {
        throw new RuntimeException("Failed to verify " + sigalg + " signature");
    }
    // Make sure signature does NOT verify when the original data
    // has changed
    sig.initVerify(pub);
    for (int i = 0; i < UPDATE_TIMES_FIFTY; i++) {
        sig.update(data);
    }
    if (sig.verify(signedData)) {
        throw new RuntimeException("Failed to detect bad " + sigalg + " signature");
    }
}

Example 67 with Signature

use of java.security.Signature in project jdk8u_jdk by JetBrains.

the class Offsets method init.

static Offsets init(String provider, String algorithm) throws NoSuchAlgorithmException, NoSuchProviderException, InvalidKeyException, SignatureException {
    // fill the cleartext data with random bytes
    byte[] cleartext = new byte[100];
    RandomFactory.getRandom().nextBytes(cleartext);
    // NONEwith requires input to be of 20 bytes
    int size = algorithm.contains("NONEwith") ? 20 : 100;
    // create signature instance
    Signature signature = Signature.getInstance(algorithm, provider);
    String keyAlgo;
    if (algorithm.contains("RSA")) {
        keyAlgo = "RSA";
    } else if (algorithm.contains("ECDSA")) {
        keyAlgo = "EC";
    } else if (algorithm.contains("DSA")) {
        keyAlgo = "DSA";
    } else {
        throw new RuntimeException("Test doesn't support this signature " + "algorithm: " + algorithm);
    }
    KeyPairGenerator kpg = KeyPairGenerator.getInstance(keyAlgo, provider);
    KeyPair kp = kpg.generateKeyPair();
    PublicKey pubkey = kp.getPublic();
    PrivateKey privkey = kp.getPrivate();
    return new Offsets(signature, pubkey, privkey, size, cleartext);
}

Example 68 with Signature

use of java.security.Signature in project jdk8u_jdk by JetBrains.

the class VerifyRangeCheckOverflow method main.

public static void main(String[] args) throws Exception {
    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("DSA");
    keyPairGenerator.initialize(1024);
    KeyPair keys = keyPairGenerator.generateKeyPair();
    PublicKey publicKey = keys.getPublic();
    byte[] sigBytes = new byte[100];
    Signature signature = Signature.getInstance("SHA1withDSA");
    signature.initVerify(publicKey);
    try {
        signature.verify(sigBytes, Integer.MAX_VALUE, 1);
    } catch (IllegalArgumentException ex) {
    // Expected
    }
}

Example 69 with Signature

use of java.security.Signature in project jdk8u_jdk by JetBrains.

the class Chain method runTest.

static boolean runTest(Test test) {
    System.out.format("Test: provider = %s, signature algorithm = %s, " + "key algorithm = %s\n", test.provider, test.sigAlg, test.keyAlg);
    try {
        // Generate all private/public key pairs
        PrivateKey[] privKeys = new PrivateKey[N];
        PublicKey[] pubKeys = new PublicKey[N];
        PublicKey[] anotherPubKeys = new PublicKey[N];
        KeyPairGenerator kpg = KeyPairGenerator.getInstance(test.keyAlg.name);
        for (int j = 0; j < N; j++) {
            KeyPair kp = kpg.genKeyPair();
            KeyPair anotherKp = kpg.genKeyPair();
            privKeys[j] = kp.getPrivate();
            pubKeys[j] = kp.getPublic();
            anotherPubKeys[j] = anotherKp.getPublic();
            if (Arrays.equals(pubKeys[j].getEncoded(), anotherPubKeys[j].getEncoded())) {
                System.out.println("Failed: it should not get " + "the same pair of public key");
                return false;
            }
        }
        Signature signature;
        if (test.provider != Provider.Default) {
            signature = Signature.getInstance(test.sigAlg.name, test.provider.name);
        } else {
            signature = Signature.getInstance(test.sigAlg.name);
        }
        // Create a chain of signed objects
        SignedObject[] objects = new SignedObject[N];
        objects[0] = new SignedObject(str, privKeys[0], signature);
        for (int j = 1; j < N; j++) {
            objects[j] = new SignedObject(objects[j - 1], privKeys[j], signature);
        }
        // Verify the chain
        int n = objects.length - 1;
        SignedObject object = objects[n];
        do {
            if (!object.verify(pubKeys[n], signature)) {
                System.out.println("Failed: verification failed, n = " + n);
                return false;
            }
            if (object.verify(anotherPubKeys[n], signature)) {
                System.out.println("Failed: verification should not " + "succeed with wrong public key, n = " + n);
                return false;
            }
            object = (SignedObject) object.getObject();
            n--;
        } while (n > 0);
        System.out.println("signed data: " + object.getObject());
        if (!str.equals(object.getObject())) {
            System.out.println("Failed: signed data is not equal to " + "original one");
            return false;
        }
        System.out.println("Test passed");
        return true;
    } catch (NoSuchProviderException nspe) {
        if (test.provider == Provider.SunMSCAPI && !System.getProperty("os.name").startsWith("Windows")) {
            System.out.println("SunMSCAPI is available only on Windows: " + nspe);
            return true;
        }
        System.out.println("Unexpected exception: " + nspe);
        return false;
    } catch (Exception e) {
        System.out.println("Unexpected exception: " + e);
        e.printStackTrace(System.out);
        return false;
    }
}

Example 70 with Signature

use of java.security.Signature in project jdk8u_jdk by JetBrains.

the class Copy method main.

public static void main(String[] args) throws Exception {
    KeyPairGenerator kg = KeyPairGenerator.getInstance(DSA);
    kg.initialize(KEY_SIZE);
    KeyPair kp = kg.genKeyPair();
    Signature signature = Signature.getInstance(DSA);
    Test original = new Test();
    SignedObject so = new SignedObject(original, kp.getPrivate(), signature);
    System.out.println("Signature algorithm: " + so.getAlgorithm());
    signature = Signature.getInstance(DSA, "SUN");
    if (!so.verify(kp.getPublic(), signature)) {
        throw new RuntimeException("Verification failed");
    }
    kg = KeyPairGenerator.getInstance(DSA);
    kg.initialize(KEY_SIZE);
    kp = kg.genKeyPair();
    if (so.verify(kp.getPublic(), signature)) {
        throw new RuntimeException("Unexpected success");
    }
    Object copy = so.getObject();
    if (!original.equals(copy)) {
        throw new RuntimeException("Signed object is not equal " + "to original one: " + copy);
    }
    /*
         * The signed object is a copy of an original one.
         * Once the copy is made, further manipulation
         * of the original object shouldn't has any effect on the copy.
         */
    original.set(MAGIC - 1);
    copy = so.getObject();
    if (original.equals(copy)) {
        throw new RuntimeException("Signed object is not a copy " + "of original one: " + copy);
    }
    System.out.println("Test passed");
}