Examples of codec.pkcs1.DigestInfo

org.bouncycastle2.asn1.x509.DigestInfo
This class implements a DigestInfo data structure according to PKCS#1
```
 DigestInfo ::= SEQUENCE { digestAlgorithm AlgorithmIdentifier, -- identifies the digest algorithm digest OCTET STRING                  -- contains the DER-encoded digest value } 
```
@author Michele Boivin @version "$Id: DigestInfo.java,v 1.6 2002/08/28 21:40:35 jpeters Exp $"

            mac.update(data);


            byte[]      res = mac.doFinal();


            AlgorithmIdentifier     algId = new AlgorithmIdentifier(id_SHA1, new DERNull());
            DigestInfo              dInfo = new DigestInfo(algId, res);


            mData = new MacData(dInfo, mSalt, itCount);
        }
        catch (Exception e)
        {

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    }


    private byte[] derEncode(
        byte[] hash)
    {
        DigestInfo dInfo = new DigestInfo(algId, hash);


        return dInfo.getDEREncoded();
    }

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        boolean         wrongPKCS12Zero = false;


        if (bag.getMacData() != null)           // check the mac code
        {
            MacData                     mData = bag.getMacData();
            DigestInfo                  dInfo = mData.getMac();
            AlgorithmIdentifier         algId = dInfo.getAlgorithmId();
            byte[]                      salt = mData.getSalt();
            int                         itCount = mData.getIterationCount().intValue();


            byte[]  data = ((ASN1OctetString)info.getContent()).getOctets();


            try
            {
                byte[] res = calculatePbeMac(algId.getObjectId(), salt, itCount, password, false, data);
                byte[] dig = dInfo.getDigest();


                if (!Arrays.areEqual(res, dig))
                {
                    if (password.length > 0)
                    {

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        try
        {
            byte[] res = calculatePbeMac(id_SHA1, mSalt, itCount, password, false, data);


            AlgorithmIdentifier     algId = new AlgorithmIdentifier(id_SHA1, new DERNull());
            DigestInfo              dInfo = new DigestInfo(algId, res);


            mData = new MacData(dInfo, mSalt, itCount);
        }
        catch (Exception e)
        {

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            throw new IOException("not a digest info object");
        }
        
        ASN1InputStream         aIn = new ASN1InputStream(encoding);


        DigestInfo digInfo = new DigestInfo((ASN1Sequence)aIn.readObject());


        // length check to avoid Bleichenbacher vulnerability


        if (digInfo.getEncoded().length != encoding.length)
        {
            throw new CMSException("malformed RSA signature");
        }


        return digInfo;

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                    c = Cipher.getInstance("RSA/ECB/PKCS1Padding");
                }
                
                c.init(Cipher.DECRYPT_MODE, key);
                
                DigestInfo digInfo = derDecode(c.doFinal(signature));


                if (!digInfo.getAlgorithmId().getObjectId().equals(digestAlgorithm.getObjectId()))
                {
                    return false;
                }
             
                if (!isNull(digInfo.getAlgorithmId().getParameters()))
                {
                    return false;
                }


                byte[]  sigHash = digInfo.getDigest();


                return MessageDigest.isEqual(digest, sigHash);
            }
            else if (algorithm.equals("DSA"))
            {

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        if (bag.getMacData() != null)           // check the mac code
        {
            ByteArrayOutputStream       bOut = new ByteArrayOutputStream();
            BEROutputStream             berOut = new BEROutputStream(bOut);
            MacData                     mData = bag.getMacData();
            DigestInfo                  dInfo = mData.getMac();
            AlgorithmIdentifier         algId = dInfo.getAlgorithmId();
            byte[]                      salt = mData.getSalt();
            int                         itCount = mData.getIterationCount().intValue();
        
            berOut.writeObject(info);


            byte[]  data = ((ASN1OctetString)info.getContent()).getOctets();


            try
            {
                Mac                 mac = Mac.getInstance(algId.getObjectId().getId(), "BC");
                SecretKeyFactory    keyFact = SecretKeyFactory.getInstance(algId.getObjectId().getId(), "BC");
                PBEParameterSpec    defParams = new PBEParameterSpec(salt, itCount);
                PBEKeySpec          pbeSpec = new PBEKeySpec(password);


                mac.init(keyFact.generateSecret(pbeSpec), defParams);


                mac.update(data);


                byte[]  res = mac.doFinal();
                byte[]  dig = dInfo.getDigest();


                if (res.length != dInfo.getDigest().length)
                {
                    throw new IOException("PKCS12 key store mac invalid - wrong password or corrupted file.");
                }


                boolean okay = true;
                
                for (int i = 0; i != res.length; i++)
                {
                    if (res[i] != dig[i])
                    {
                        if (password.length != 0)  // may be dodgey zero password
                        {
                            throw new IOException("PKCS12 key store mac invalid - wrong password or corrupted file.");
                        }
                        else
                        {
                            okay = false;
                            break;
                        }
                    }
                }
                
                //
                // may be incorrect zero length password
                //
                if (!okay)
                {
                    SecretKey k = keyFact.generateSecret(pbeSpec);
                    
                    ((JCEPBEKey)k).setTryWrongPKCS12Zero(true);
                    
                    mac.init(k, defParams);
    
                    mac.update(data);
    
                    res = mac.doFinal();
                    dig = dInfo.getDigest();
                    
                    for (int i = 0; i != res.length; i++)
                    {
                        if (res[i] != dig[i])
                        {

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            mac.update(data);


            byte[]      res = mac.doFinal();


            AlgorithmIdentifier     algId = new AlgorithmIdentifier(id_SHA1, new DERNull());
            DigestInfo              dInfo = new DigestInfo(algId, res);


            mData = new MacData(dInfo, mSalt, itCount);
        }
        catch (Exception e)
        {

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    private byte[] derEncode(
        byte[]  hash)
        throws IOException
    {
        DigestInfo              dInfo = new DigestInfo(algId, hash);


        return dInfo.getEncoded(ASN1Encodable.DER);
    }

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        {
            // For raw RSA, the DigestInfo must be prepared externally
            return hash;
        }


        DigestInfo              dInfo = new DigestInfo(algId, hash);


        return dInfo.getEncoded(ASN1Encodable.DER);
    }

View Full Code Here

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Related Classes of codec.pkcs1.DigestInfo

codec.asn1.ASN1OctetString

codec.pkcs12.MacData

codec.x509.AlgorithmIdentifier

org.apache.geronimo.crypto.asn1.ASN1EncodableVector

org.apache.geronimo.crypto.asn1.DEROctetString

org.apache.geronimo.crypto.asn1.DERSequence

org.apache.geronimo.util.asn1.ASN1EncodableVector

org.apache.geronimo.util.asn1.DEROctetString

org.apache.geronimo.util.asn1.DERSequence

org.bouncycastle.asn1.ASN1EncodableVector

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