Example usage for org.bouncycastle.asn1 ASN1InputStream ASN1InputStream

Introduction

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

Prototype

public ASN1InputStream(byte[] input) 

Source Link

Document

Create an ASN1InputStream based on the input byte array.

Usage

From source file:fi.laverca.Pkcs7.java

License:Apache License

/**
 * Convert a byte array to a PKCS7 SignedData object
 * @param bytes byte array/*from   w  w  w .  jav a  2 s  .c om*/
 * @return PKCS7 SignedData object
 */
public static SignedData bytesToPkcs7SignedData(byte[] bytes) {

    if (bytes == null) {
        throw new IllegalArgumentException("null bytes");
    }

    ASN1InputStream ais = new ASN1InputStream(bytes);
    ASN1Object asn1 = null;
    try {
        asn1 = ais.readObject();
    } catch (IOException ioe) {
        throw new IllegalArgumentException("not a pkcs7 signature");
    } finally {
        try {
            ais.close();
        } catch (IOException e) {
            // Ignore
        }
    }

    ContentInfo ci = ContentInfo.getInstance(asn1);

    DERObjectIdentifier typeId = ci.getContentType();
    if (!typeId.equals(PKCSObjectIdentifiers.signedData)) {
        throw new IllegalArgumentException("not a pkcs7 signature");
    }

    return SignedData.getInstance(ci.getContent());
}

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From source file:fr.insalyon.creatis.vip.core.server.business.proxy.ProxyClient.java

License:Open Source License

private void printKey(PrivateKey key, PrintStream out) throws IOException {
    out.println("-----BEGIN RSA PRIVATE KEY-----");
    ByteArrayInputStream inStream = new ByteArrayInputStream(key.getEncoded());
    ASN1InputStream derInputStream = new ASN1InputStream(inStream);
    ASN1Primitive keyInfo = derInputStream.readObject();
    PrivateKeyInfo pki;/*from   ww  w .  j  a  v a2s  .  c  om*/
    pki = PrivateKeyInfo.getInstance(keyInfo);
    ASN1Primitive innerType = pki.parsePrivateKey().toASN1Primitive();
    // build and return the actual key
    ASN1Sequence privKey = (ASN1Sequence) innerType;
    ByteArrayOutputStream bout = new ByteArrayOutputStream();
    DEROutputStream der = new DEROutputStream(bout);
    der.writeObject(privKey);
    printB64(bout.toByteArray(), out);
    out.println("-----END RSA PRIVATE KEY-----");
}

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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()));
}

---

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 w ww .j a va  2  s . c o  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  w  w .j a v  a 2  s. 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);/*from ww  w  . j  a va  2 s. co  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 {/*from  ww  w. j a va  2 s .c o m*/
        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 w w. j  av  a2s. c o m
        System.out.println("key recovery failed");
    }
}

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