Example usage for org.bouncycastle.asn1 ASN1InputStream readObject

Introduction

In this page you can find the example usage for org.bouncycastle.asn1 ASN1InputStream readObject.

Prototype

public ASN1Primitive readObject() throws IOException 

Source Link

Usage

From source file:id.govca.detachedsignature.FileHelper.java

public static byte[] CMStoDER(CMSSignedData sigData) throws IOException {
    ByteArrayInputStream inStream = new ByteArrayInputStream(sigData.getEncoded());
    ASN1InputStream asnInputStream = new ASN1InputStream(inStream);

    ASN1Primitive asp = asnInputStream.readObject();
    byte[] result = asp.getEncoded("DER");

    return result;
}

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From source file:io.aos.crypto.spl05.ASN1DumpExample.java

License:Apache License

public static void main(String... args) throws Exception {
    byte[] baseData = new byte[5];
    Date created = new Date(0); // 1/1/1970

    MyStructure structure = new MyStructure(0, created, baseData, "hello", "world");

    System.out.println(ASN1Dump.dumpAsString(structure));

    structure = new MyStructure(1, created, baseData, "hello", "world");

    System.out.println(ASN1Dump.dumpAsString(structure));

    ASN1InputStream aIn = new ASN1InputStream(structure.getEncoded());

    System.out.println(ASN1Dump.dumpAsString(aIn.readObject()));
}

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From source file:io.aos.crypto.spl05.EncryptedPrivateKeyInfoExample.java

License:Apache License

public static void main(String[] args) throws Exception {
    // generate a key pair
    KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", "BC");
    kpg.initialize(128, Utils.createFixedRandom());

    KeyPair pair = kpg.generateKeyPair();

    // wrapping step
    char[] password = "hello".toCharArray();
    byte[] salt = new byte[20];
    int iCount = 100;
    String pbeAlgorithm = "PBEWithSHAAnd3-KeyTripleDES-CBC";
    PBEKeySpec pbeKeySpec = new PBEKeySpec(password, salt, iCount);
    SecretKeyFactory secretKeyFact = SecretKeyFactory.getInstance(pbeAlgorithm, "BC");
    Cipher cipher = Cipher.getInstance(pbeAlgorithm, "BC");

    cipher.init(Cipher.WRAP_MODE, secretKeyFact.generateSecret(pbeKeySpec));

    byte[] wrappedKey = cipher.wrap(pair.getPrivate());

    System.out.println(//from  www.  j av  a  2  s .  co  m
            ASN1Dump.dumpAsString(new ASN1InputStream(cipher.getParameters().getEncoded()).readObject()));

    // create carrier   
    EncryptedPrivateKeyInfo pInfo = new EncryptedPrivateKeyInfo(cipher.getParameters(), wrappedKey);

    // unwrapping step - note we only use the password
    pbeKeySpec = new PBEKeySpec(password);

    cipher = Cipher.getInstance(pInfo.getAlgName(), "BC");

    cipher.init(Cipher.DECRYPT_MODE, secretKeyFact.generateSecret(pbeKeySpec), pInfo.getAlgParameters());

    PKCS8EncodedKeySpec pkcs8Spec = pInfo.getKeySpec(cipher);
    KeyFactory keyFact = KeyFactory.getInstance("RSA", "BC");
    PrivateKey privKey = keyFact.generatePrivate(pkcs8Spec);

    ASN1InputStream aIn = new ASN1InputStream(pkcs8Spec.getEncoded());
    PrivateKeyInfo info = PrivateKeyInfo.getInstance(aIn.readObject());

    System.out.println(ASN1Dump.dumpAsString(info));
    System.out.println(ASN1Dump.dumpAsString(info.getPrivateKey()));

    if (privKey.equals(pair.getPrivate())) {
        System.out.println("key recovery successful");
    } else {
        System.out.println("key recovery failed");
    }
}

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From source file:io.aos.crypto.spl05.IVExample.java

License:Apache License

public static void main(String... args) throws Exception {
    // set up the parameters object
    AlgorithmParameters params = AlgorithmParameters.getInstance("AES", "BC");
    IvParameterSpec ivSpec = new IvParameterSpec(new byte[16]);

    params.init(ivSpec);/*from   w  ww . j a  v  a 2s .c  om*/

    // look at the ASN.1 encodng.
    ASN1InputStream aIn = new ASN1InputStream(params.getEncoded("ASN.1"));

    System.out.println(ASN1Dump.dumpAsString(aIn.readObject()));
}

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From source file:io.aos.crypto.spl05.PKCS1SigEncodingExample.java

License:Apache License

public static void main(String[] args) throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA", "BC");

    keyGen.initialize(512, new SecureRandom());

    KeyPair keyPair = keyGen.generateKeyPair();
    Signature signature = Signature.getInstance("SHA256withRSA", "BC");

    // generate a signature
    signature.initSign(keyPair.getPrivate());

    byte[] message = new byte[] { (byte) 'a', (byte) 'b', (byte) 'c' };

    signature.update(message);/*  www  .j  a v  a2 s .c o  m*/

    byte[] sigBytes = signature.sign();

    // open the signature
    Cipher cipher = Cipher.getInstance("RSA/None/PKCS1Padding", "BC");

    cipher.init(Cipher.DECRYPT_MODE, keyPair.getPublic());

    byte[] decSig = cipher.doFinal(sigBytes);

    // parse the signature
    ASN1InputStream aIn = new ASN1InputStream(decSig);
    ASN1Sequence seq = (ASN1Sequence) aIn.readObject();

    System.out.println(ASN1Dump.dumpAsString(seq));

    // grab a digest of the correct type
    MessageDigest hash = MessageDigest.getInstance("SHA-256", "BC");

    hash.update(message);

    ASN1OctetString sigHash = (ASN1OctetString) seq.getObjectAt(1);
    if (MessageDigest.isEqual(hash.digest(), sigHash.getOctets())) {
        System.out.println("hash verification succeeded");
    } else {
        System.out.println("hash verification failed");
    }
}

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From source file:io.aos.crypto.spl05.PKCS8EncodedKeySpecExample.java

License:Apache License

public static void main(String[] args) throws Exception {
    // create the keys
    KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA", "BC");

    generator.initialize(128, Utils.createFixedRandom());

    KeyPair pair = generator.generateKeyPair();

    // dump private key
    ASN1InputStream aIn = new ASN1InputStream(pair.getPrivate().getEncoded());
    PrivateKeyInfo info = PrivateKeyInfo.getInstance(aIn.readObject());

    System.out.println(ASN1Dump.dumpAsString(info));
    System.out.println(ASN1Dump.dumpAsString(info.getPrivateKey()));

    // create from specification
    PKCS8EncodedKeySpec pkcs8Spec = new PKCS8EncodedKeySpec(pair.getPrivate().getEncoded());
    KeyFactory keyFact = KeyFactory.getInstance("RSA", "BC");
    PrivateKey privKey = keyFact.generatePrivate(pkcs8Spec);

    if (privKey.equals(pair.getPrivate())) {
        System.out.println("key recovery successful");
    } else {/* w  w w . ja  v a2  s  . c om*/
        System.out.println("key recovery failed");
    }
}

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From source file:io.aos.crypto.spl05.PSSParamExample.java

License:Apache License

public static void main(String... args) throws Exception {
    Signature signature = Signature.getInstance("SHA1withRSAandMGF1", "BC");

    // set the default parameters
    signature.setParameter(PSSParameterSpec.DEFAULT);

    // get the default parameters
    AlgorithmParameters params = signature.getParameters();

    // look at the ASN.1 encodng.
    ASN1InputStream aIn = new ASN1InputStream(params.getEncoded("ASN.1"));

    System.out.println(ASN1Dump.dumpAsString(aIn.readObject()));
}

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From source file:io.aos.crypto.spl05.X509EncodedKeySpecExample.java

License:Apache License

public static void main(String[] args) throws Exception {
    // create the keys
    KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA", "BC");

    generator.initialize(128, Utils.createFixedRandom());

    KeyPair pair = generator.generateKeyPair();

    // dump public key
    ASN1InputStream aIn = new ASN1InputStream(pair.getPublic().getEncoded());
    SubjectPublicKeyInfo info = SubjectPublicKeyInfo.getInstance(aIn.readObject());

    System.out.println(ASN1Dump.dumpAsString(info));
    System.out.println(ASN1Dump.dumpAsString(info.getPublicKey()));

    // create from specification
    X509EncodedKeySpec x509Spec = new X509EncodedKeySpec(pair.getPublic().getEncoded());
    KeyFactory keyFact = KeyFactory.getInstance("RSA", "BC");
    PublicKey pubKey = keyFact.generatePublic(x509Spec);

    if (pubKey.equals(pair.getPublic())) {
        System.out.println("key recovery successful");
    } else {/*from   w  ww .ja  v  a2s .  c  om*/
        System.out.println("key recovery failed");
    }
}

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From source file:io.apigee.trireme.crypto.algorithms.DsaKeyPairProvider.java

License:Open Source License

/**
 * DSA Key Pair format -- the PEM file contains an ASN.1 sequence containing six integers:
 * p, q, g, y, and x. We construct the appropriate Java data structures after parsing those.
 *///from   w  w w. ja  va 2 s.  com
@Override
public KeyPair readKeyPair(String algorithm, Reader rdr, char[] passphrase)
        throws CryptoException, IOException {
    PemReader reader = new PemReader(rdr);

    PemObject pemObj = reader.readPemObject();
    if (pemObj == null) {
        throw new CryptoException("Not a valid PEM file");
    }

    if (!DSA_TYPE.equals(pemObj.getType())) {
        throw new CryptoException("PEM file does not contain a DSA private key");
    }

    ASN1InputStream asnIn = new ASN1InputStream(pemObj.getContent());
    ASN1Primitive ao = asnIn.readObject();
    if (ao == null) {
        throw new CryptoException("PEM file does not contain an ASN.1 object");
    }
    if (!(ao instanceof ASN1Sequence)) {
        throw new CryptoException("PEM file does not contain a sequence");
    }

    ASN1Sequence seq = (ASN1Sequence) ao;
    if (seq.size() != 6) {
        throw new CryptoException("ASN.1 sequence is the wrong length for a DSA key");
    }

    DERInteger p = (DERInteger) seq.getObjectAt(1);
    DERInteger q = (DERInteger) seq.getObjectAt(2);
    DERInteger g = (DERInteger) seq.getObjectAt(3);
    DERInteger y = (DERInteger) seq.getObjectAt(4);
    DERInteger x = (DERInteger) seq.getObjectAt(5);

    try {
        KeyFactory factory = KeyFactory.getInstance("DSA");

        DSAPublicKeySpec pubSpec = new DSAPublicKeySpec(y.getValue(), p.getValue(), q.getValue(), g.getValue());
        PublicKey pub = factory.generatePublic(pubSpec);

        DSAPrivateKeySpec keySpec = new DSAPrivateKeySpec(x.getValue(), p.getValue(), q.getValue(),
                g.getValue());
        PrivateKey key = factory.generatePrivate(keySpec);

        return new KeyPair(pub, key);

    } catch (GeneralSecurityException gse) {
        throw new CryptoException(gse);
    }
}

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From source file:it.scoppelletti.spaceship.security.FakeCertificateFactory.java

License:Apache License

@SuppressWarnings({ "deprecation", "TryFinallyCanBeTryWithResources" })
public static X509Certificate create(PublicKey publicKey, FakeKeyPairGeneratorSpec spec)
        throws IOException, CertificateParsingException {
    ASN1ObjectIdentifier sigAlgOid;//from w w w  . jav a 2  s . c o m
    AlgorithmIdentifier sigAlgId;
    org.bouncycastle.jce.X509Principal subject;
    ASN1EncodableVector result;
    Certificate cert;
    org.bouncycastle.jce.provider.X509CertificateObject x509Cert;
    TBSCertificate tbsCertificate;
    ASN1InputStream publicKeyInfoIn = null;
    V3TBSCertificateGenerator tbsGenerator;
    byte[] signature;

    sigAlgOid = PKCSObjectIdentifiers.sha256WithRSAEncryption;
    sigAlgId = new AlgorithmIdentifier(sigAlgOid, DERNull.INSTANCE);
    signature = new byte[1];

    tbsGenerator = new V3TBSCertificateGenerator();
    try {
        publicKeyInfoIn = new ASN1InputStream(publicKey.getEncoded());
        tbsGenerator.setSubjectPublicKeyInfo(SubjectPublicKeyInfo.getInstance(publicKeyInfoIn.readObject()));
    } finally {
        if (publicKeyInfoIn != null) {
            publicKeyInfoIn.close();
        }
    }

    subject = new org.bouncycastle.jce.X509Principal(spec.getSubject().getEncoded());

    tbsGenerator.setSerialNumber(new ASN1Integer(spec.getSerialNumber()));
    tbsGenerator.setSubject(subject);
    tbsGenerator.setIssuer(subject);
    tbsGenerator.setStartDate(new Time(spec.getStartDate()));
    tbsGenerator.setEndDate(new Time(spec.getEndDate()));
    tbsGenerator.setSignature(sigAlgId);

    tbsCertificate = tbsGenerator.generateTBSCertificate();

    result = new ASN1EncodableVector();
    result.add(tbsCertificate);
    result.add(sigAlgId);
    result.add(new DERBitString(signature));

    cert = Certificate.getInstance(new DERSequence(result));
    x509Cert = new org.bouncycastle.jce.provider.X509CertificateObject(cert);
    return x509Cert;
}

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