package org.bouncycastle.cms;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.DERTaggedObject;
import org.bouncycastle.asn1.cms.CMSObjectIdentifiers;
import org.bouncycastle.asn1.cms.OtherRevocationInfoFormat;
import org.bouncycastle.asn1.cryptopro.CryptoProObjectIdentifiers;
import org.bouncycastle.asn1.nist.NISTObjectIdentifiers;
import org.bouncycastle.asn1.oiw.OIWObjectIdentifiers;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.teletrust.TeleTrusTObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x9.X9ObjectIdentifiers;
import org.bouncycastle.cert.X509AttributeCertificateHolder;
import org.bouncycastle.cert.X509CRLHolder;
import org.bouncycastle.cert.X509CertificateHolder;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.Store;

public class CMSSignedGenerator
{
    /**
     * Default type for the signed data.
     */
    public static final String  DATA = CMSObjectIdentifiers.data.getId();
    
    public static final String  DIGEST_SHA1 = OIWObjectIdentifiers.idSHA1.getId();
    public static final String  DIGEST_SHA224 = NISTObjectIdentifiers.id_sha224.getId();
    public static final String  DIGEST_SHA256 = NISTObjectIdentifiers.id_sha256.getId();
    public static final String  DIGEST_SHA384 = NISTObjectIdentifiers.id_sha384.getId();
    public static final String  DIGEST_SHA512 = NISTObjectIdentifiers.id_sha512.getId();
    public static final String  DIGEST_MD5 = PKCSObjectIdentifiers.md5.getId();
    public static final String  DIGEST_GOST3411 = CryptoProObjectIdentifiers.gostR3411.getId();
    public static final String  DIGEST_RIPEMD128 = TeleTrusTObjectIdentifiers.ripemd128.getId();
    public static final String  DIGEST_RIPEMD160 = TeleTrusTObjectIdentifiers.ripemd160.getId();
    public static final String  DIGEST_RIPEMD256 = TeleTrusTObjectIdentifiers.ripemd256.getId();

    public static final String  ENCRYPTION_RSA = PKCSObjectIdentifiers.rsaEncryption.getId();
    public static final String  ENCRYPTION_DSA = X9ObjectIdentifiers.id_dsa_with_sha1.getId();
    public static final String  ENCRYPTION_ECDSA = X9ObjectIdentifiers.ecdsa_with_SHA1.getId();
    public static final String  ENCRYPTION_RSA_PSS = PKCSObjectIdentifiers.id_RSASSA_PSS.getId();
    public static final String  ENCRYPTION_GOST3410 = CryptoProObjectIdentifiers.gostR3410_94.getId();
    public static final String  ENCRYPTION_ECGOST3410 = CryptoProObjectIdentifiers.gostR3410_2001.getId();

    private static final String  ENCRYPTION_ECDSA_WITH_SHA1 = X9ObjectIdentifiers.ecdsa_with_SHA1.getId();
    private static final String  ENCRYPTION_ECDSA_WITH_SHA224 = X9ObjectIdentifiers.ecdsa_with_SHA224.getId();
    private static final String  ENCRYPTION_ECDSA_WITH_SHA256 = X9ObjectIdentifiers.ecdsa_with_SHA256.getId();
    private static final String  ENCRYPTION_ECDSA_WITH_SHA384 = X9ObjectIdentifiers.ecdsa_with_SHA384.getId();
    private static final String  ENCRYPTION_ECDSA_WITH_SHA512 = X9ObjectIdentifiers.ecdsa_with_SHA512.getId();

    private static final Set NO_PARAMS = new HashSet();
    private static final Map EC_ALGORITHMS = new HashMap();

    static
    {
        NO_PARAMS.add(ENCRYPTION_DSA);
        NO_PARAMS.add(ENCRYPTION_ECDSA);
        NO_PARAMS.add(ENCRYPTION_ECDSA_WITH_SHA1);
        NO_PARAMS.add(ENCRYPTION_ECDSA_WITH_SHA224);
        NO_PARAMS.add(ENCRYPTION_ECDSA_WITH_SHA256);
        NO_PARAMS.add(ENCRYPTION_ECDSA_WITH_SHA384);
        NO_PARAMS.add(ENCRYPTION_ECDSA_WITH_SHA512);

        EC_ALGORITHMS.put(DIGEST_SHA1, ENCRYPTION_ECDSA_WITH_SHA1);
        EC_ALGORITHMS.put(DIGEST_SHA224, ENCRYPTION_ECDSA_WITH_SHA224);
        EC_ALGORITHMS.put(DIGEST_SHA256, ENCRYPTION_ECDSA_WITH_SHA256);
        EC_ALGORITHMS.put(DIGEST_SHA384, ENCRYPTION_ECDSA_WITH_SHA384);
        EC_ALGORITHMS.put(DIGEST_SHA512, ENCRYPTION_ECDSA_WITH_SHA512);
    }

    protected List certs = new ArrayList();
    protected List crls = new ArrayList();
    protected List _signers = new ArrayList();
    protected List signerGens = new ArrayList();
    protected Map digests = new HashMap();

    /**
     * base constructor
     */
    protected CMSSignedGenerator()
    {
    }

    protected Map getBaseParameters(ASN1ObjectIdentifier contentType, AlgorithmIdentifier digAlgId, byte[] hash)
    {
        Map param = new HashMap();
        param.put(CMSAttributeTableGenerator.CONTENT_TYPE, contentType);
        param.put(CMSAttributeTableGenerator.DIGEST_ALGORITHM_IDENTIFIER, digAlgId);
        param.put(CMSAttributeTableGenerator.DIGEST, Arrays.clone(hash));
        return param;
    }

    /**
     * Add a certificate to the certificate set to be included with the generated SignedData message.
     *
     * @param certificate the certificate to be included.
     * @throws CMSException if the certificate cannot be encoded for adding.
     */
    public void addCertificate(
        X509CertificateHolder certificate)
        throws CMSException
    {
        certs.add(certificate.toASN1Structure());
    }

    /**
     * Add the certificates in certStore to the certificate set to be included with the generated SignedData message.
     *
     * @param certStore the store containing the certificates to be included.
     * @throws CMSException if the certificates cannot be encoded for adding.
     */
    public void addCertificates(
        Store certStore)
        throws CMSException
    {
        certs.addAll(CMSUtils.getCertificatesFromStore(certStore));
    }

    /**
     * Add a CRL to the CRL set to be included with the generated SignedData message.
     *
     * @param crl the CRL to be included.
     */
    public void addCRL(X509CRLHolder crl)
    {
        crls.add(crl.toASN1Structure());
    }

    /**
     * Add the CRLs in crlStore to the CRL set to be included with the generated SignedData message.
     *
     * @param crlStore the store containing the CRLs to be included.
     * @throws CMSException if the CRLs cannot be encoded for adding.
     */
    public void addCRLs(
        Store crlStore)
        throws CMSException
    {
        crls.addAll(CMSUtils.getCRLsFromStore(crlStore));
    }

    /**
     * Add the attribute certificates in attrStore to the certificate set to be included with the generated SignedData message.
     *
     * @param attrCert the store containing the certificates to be included.
     * @throws CMSException if the attribute certificate cannot be encoded for adding.
     */
    public void addAttributeCertificate(
        X509AttributeCertificateHolder attrCert)
        throws CMSException
    {
        certs.add(new DERTaggedObject(false, 2, attrCert.toASN1Structure()));
    }

    /**
     * Add the attribute certificates in attrStore to the certificate set to be included with the generated SignedData message.
     *
     * @param attrStore the store containing the certificates to be included.
     * @throws CMSException if the attribute certificate cannot be encoded for adding.
     */
    public void addAttributeCertificates(
        Store attrStore)
        throws CMSException
    {
        certs.addAll(CMSUtils.getAttributeCertificatesFromStore(attrStore));
    }

    /**
     * Add a single instance of otherRevocationData to the CRL set to be included with the generated SignedData message.
     *
     * @param otherRevocationInfoFormat the OID specifying the format of the otherRevocationInfo data.
     * @param otherRevocationInfo the otherRevocationInfo ASN.1 structure.
     */
    public void addOtherRevocationInfo(
        ASN1ObjectIdentifier   otherRevocationInfoFormat,
        ASN1Encodable          otherRevocationInfo)
    {
        crls.add(new DERTaggedObject(false, 1, new OtherRevocationInfoFormat(otherRevocationInfoFormat, otherRevocationInfo)));
    }

    /**
     * Add a Store of otherRevocationData to the CRL set to be included with the generated SignedData message.
     *
     * @param otherRevocationInfoFormat the OID specifying the format of the otherRevocationInfo data.
     * @param otherRevocationInfos a Store of otherRevocationInfo data to add.
     */
    public void addOtherRevocationInfo(
        ASN1ObjectIdentifier   otherRevocationInfoFormat,
        Store                  otherRevocationInfos)
    {
        crls.addAll(CMSUtils.getOthersFromStore(otherRevocationInfoFormat, otherRevocationInfos));
    }

    /**
     * Add a store of pre-calculated signers to the generator.
     *
     * @param signerStore store of signers
     */
    public void addSigners(
        SignerInformationStore    signerStore)
    {
        Iterator    it = signerStore.getSigners().iterator();

        while (it.hasNext())
        {
            _signers.add(it.next());
        }
    }

    /**
     * Add a generator for a particular signer to this CMS SignedData generator.
     *
     * @param infoGen the generator representing the particular signer.
     */
    public void addSignerInfoGenerator(SignerInfoGenerator infoGen)
    {
         signerGens.add(infoGen);
    }

    /**
     * Return a map of oids and byte arrays representing the digests calculated on the content during
     * the last generate.
     *
     * @return a map of oids (as String objects) and byte[] representing digests.
     */
    public Map getGeneratedDigests()
    {
        return new HashMap(digests);
    }
}