p7bparser.java

进行与数字证书相关开发必须的java源码

// Decompiled by Jad v1.5.7g. Copyright 2000 Pavel Kouznetsov.
// Jad home page: http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi 
// Source File Name:   P7BParser.java

package jit.asn1parser.pkcs.pkcs7;

import java.io.*;
import java.util.Enumeration;
import java.util.Vector;
import jit.asn1.*;
import jit.asn1.pkcs.PKCSObjectIdentifiers;
import jit.asn1.pkcs.pkcs7.ContentInfo;
import jit.asn1.pkcs.pkcs7.SignedData;
import jit.asn1.x509.X509CertificateStructure;
import jit.asn1parser.x509.X509Cert;

public class P7BParser
{

    public P7BParser()
    {
    }

    public X509Cert[] parseP7b(ContentInfo contentInfo)
        throws Exception
    {
        if(!contentInfo.getContentType().equals(PKCSObjectIdentifiers.signedData))
            throw new Exception("not support p7b file typ, contentType:".concat(String.valueOf(String.valueOf(contentInfo.getContentType().getId()))));
        SignedData signedData = SignedData.getInstance(contentInfo.getContent());
        ASN1Set certSet = signedData.getCertificates();
        Enumeration enum = certSet.getObjects();
        Vector v = new Vector();
        X509Cert cert = null;
        for(; enum.hasMoreElements(); v.add(cert))
        {
            X509CertificateStructure certStruc = X509CertificateStructure.getInstance(enum.nextElement());
            cert = new X509Cert(certStruc);
        }

        X509Cert certs[] = new X509Cert[v.size()];
        v.toArray(certs);
        return certs;
    }

    public X509Cert[] parseP7b(String fileName)
        throws Exception
    {
        FileInputStream fin = new FileInputStream(fileName);
        ASN1InputStream ais = new ASN1InputStream(fin);
        ContentInfo contentInfo = ContentInfo.getInstance(ais.readObject());
        ais.close();
        fin.close();
        return parseP7b(contentInfo);
    }

    public X509Cert[] parseP7b(InputStream ins)
        throws Exception
    {
        ASN1InputStream ais = new ASN1InputStream(ins);
        ContentInfo contentInfo = ContentInfo.getInstance(ais.readObject());
        ins.close();
        ais.close();
        return parseP7b(contentInfo);
    }

    public ContentInfo generateP7b(X509Cert certs[])
        throws Exception
    {
        ASN1EncodableVector v = new ASN1EncodableVector();
        for(int i = 0; i < certs.length; i++)
        {
            X509CertificateStructure certStruc = certs[i].getCertStructure();
            v.add(certStruc);
        }

        DERSet certSet = new DERSet(v);
        DERSet algs = new DERSet();
        DERSet signerInfos = new DERSet();
        ContentInfo ci = new ContentInfo(PKCSObjectIdentifiers.data, null);
        SignedData signedData = new SignedData(new DERInteger(1), algs, ci, certSet, null, signerInfos);
        ContentInfo contentInfo = new ContentInfo(PKCSObjectIdentifiers.signedData, signedData);
        return contentInfo;
    }

    public void generateP7bFile(X509Cert certs[], String fileName)
        throws Exception
    {
        ContentInfo contentInfo = generateP7b(certs);
        FileOutputStream fos = new FileOutputStream(fileName);
        DEROutputStream dos = new DEROutputStream(fos);
        dos.writeObject(contentInfo.getDERObject());
        dos.close();
        fos.close();
    }
}