import org.bouncycastle.crypto.params.GOST3410ValidationParameters; //导入依赖的package包/类
/**
 * which generates the p , q and a values from the given parameters,
 * returning the GOST3410Parameters object.
 */
public GOST3410Parameters generateParameters()
{
    BigInteger [] pq = new BigInteger[2];
    BigInteger    q = null, p = null, a = null;

    int  x0, c;
    long  x0L, cL;

    if (typeproc==1)
    {
        x0 = init_random.nextInt();
        c  = init_random.nextInt();

        switch(size)
        {
        case 512:  
            procedure_A(x0, c, pq, 512); 
            break;
        case 1024: 
            procedure_B(x0, c, pq); 
            break;
        default: 
            throw new IllegalArgumentException("Ooops! key size 512 or 1024 bit.");
        }
        p = pq[0];  q = pq[1];
        a = procedure_C(p, q);
        //System.out.println("p:"+p.toString(16)+"\n"+"q:"+q.toString(16)+"\n"+"a:"+a.toString(16));
        //System.out.println("p:"+p+"\n"+"q:"+q+"\n"+"a:"+a);
        return new GOST3410Parameters(p, q, a, new GOST3410ValidationParameters(x0, c));
    }
    else
    {
        x0L = init_random.nextLong();
        cL  = init_random.nextLong();

        switch(size)
        {
        case 512:  
            procedure_Aa(x0L, cL, pq, 512); 
            break;
        case 1024: 
            procedure_Bb(x0L, cL, pq); 
            break;
        default: 
            throw new IllegalStateException("Ooops! key size 512 or 1024 bit.");
        }
        p = pq[0];  q = pq[1];
        a = procedure_C(p, q);
        //System.out.println("p:"+p.toString(16)+"\n"+"q:"+q.toString(16)+"\n"+"a:"+a.toString(16));
        //System.out.println("p:"+p+"\n"+"q:"+q+"\n"+"a:"+a);
        return new GOST3410Parameters(p, q, a, new GOST3410ValidationParameters(x0L, cL));
    }
}