content: package local.org.bouncycastle.asn1.cryptopro;
  
  import java.math.BigInteger;
  import java.util.Enumeration;
  import java.util.Hashtable;
  
  import local.org.bouncycastle.asn1.ASN1ObjectIdentifier;
  import local.org.bouncycastle.crypto.params.ECDomainParameters;
  import local.org.bouncycastle.math.ec.ECCurve;
  import local.org.bouncycastle.math.ec.ECFieldElement;
  import local.org.bouncycastle.math.ec.ECPoint;
  
  
  /**
   * table of the available named parameters for GOST 3410-2001.
   */
  public class ECGOST3410NamedCurves
  {
      static final Hashtable objIds = new Hashtable();
      static final Hashtable params = new Hashtable();
      static final Hashtable names = new Hashtable();
  
      static
      {
          BigInteger mod_p = new BigInteger("115792089237316195423570985008687907853269984665640564039457584007913129639319");
          BigInteger mod_q = new BigInteger("115792089237316195423570985008687907853073762908499243225378155805079068850323");
          
          ECCurve.Fp curve = new ECCurve.Fp(
              mod_p, // p
              new BigInteger("115792089237316195423570985008687907853269984665640564039457584007913129639316"), // a
              new BigInteger("166")); // b
  
          ECDomainParameters ecParams = new ECDomainParameters(
              curve,
              new ECPoint.Fp(curve,
                      new ECFieldElement.Fp(curve.getQ(),new BigInteger("1")), // x
                      new ECFieldElement.Fp(curve.getQ(),new BigInteger("64033881142927202683649881450433473985931760268884941288852745803908878638612"))), // y
              mod_q);
          
          params.put(CryptoProObjectIdentifiers.gostR3410_2001_CryptoPro_A, ecParams);  
          
          mod_p = new BigInteger("115792089237316195423570985008687907853269984665640564039457584007913129639319");
          mod_q = new BigInteger("115792089237316195423570985008687907853073762908499243225378155805079068850323");
          
          curve = new ECCurve.Fp(
                  mod_p, // p
                  new BigInteger("115792089237316195423570985008687907853269984665640564039457584007913129639316"),
                  new BigInteger("166"));
  
          ecParams = new ECDomainParameters(
                  curve,
                  new ECPoint.Fp(curve,
                          new ECFieldElement.Fp(curve.getQ(),new BigInteger("1")), // x
                          new ECFieldElement.Fp(curve.getQ(),new BigInteger("64033881142927202683649881450433473985931760268884941288852745803908878638612"))), // y
                  mod_q);
  
          params.put(CryptoProObjectIdentifiers.gostR3410_2001_CryptoPro_XchA, ecParams); 
          
          mod_p = new BigInteger("57896044618658097711785492504343953926634992332820282019728792003956564823193"); //p
          mod_q = new BigInteger("57896044618658097711785492504343953927102133160255826820068844496087732066703"); //q
          
          curve = new ECCurve.Fp(
              mod_p, // p
              new BigInteger("57896044618658097711785492504343953926634992332820282019728792003956564823190"), // a
              new BigInteger("28091019353058090096996979000309560759124368558014865957655842872397301267595")); // b
  
          ecParams = new ECDomainParameters(
              curve,
              new ECPoint.Fp(curve,
                             new ECFieldElement.Fp(mod_p,new BigInteger("1")), // x
                             new ECFieldElement.Fp(mod_p,new BigInteger("28792665814854611296992347458380284135028636778229113005756334730996303888124"))), // y
              mod_q); // q
  
          params.put(CryptoProObjectIdentifiers.gostR3410_2001_CryptoPro_B, ecParams);  
          
          mod_p = new BigInteger("70390085352083305199547718019018437841079516630045180471284346843705633502619");
          mod_q = new BigInteger("70390085352083305199547718019018437840920882647164081035322601458352298396601");
          
          curve = new ECCurve.Fp(
                  mod_p, // p
                  new BigInteger("70390085352083305199547718019018437841079516630045180471284346843705633502616"),
                  new BigInteger("32858"));
  
          ecParams = new ECDomainParameters(
                  curve,
                  new ECPoint.Fp(curve,
                                 new ECFieldElement.Fp(mod_p,new BigInteger("0")),
                                 new ECFieldElement.Fp(mod_p,new BigInteger("29818893917731240733471273240314769927240550812383695689146495261604565990247"))),
              mod_q);
          
          params.put(CryptoProObjectIdentifiers.gostR3410_2001_CryptoPro_XchB, ecParams);  
                                  
          mod_p = new BigInteger("70390085352083305199547718019018437841079516630045180471284346843705633502619"); //p
          mod_q = new BigInteger("70390085352083305199547718019018437840920882647164081035322601458352298396601"); //q
          curve = new ECCurve.Fp(
              mod_p, // p
              new BigInteger("70390085352083305199547718019018437841079516630045180471284346843705633502616"), // a
              new BigInteger("32858")); // b
  
          ecParams = new ECDomainParameters(
              curve,
              new ECPoint.Fp(curve,
                             new ECFieldElement.Fp(mod_p,new BigInteger("0")), // x
                             new ECFieldElement.Fp(mod_p,new BigInteger("29818893917731240733471273240314769927240550812383695689146495261604565990247"))), // y
              mod_q); // q
  
          params.put(CryptoProObjectIdentifiers.gostR3410_2001_CryptoPro_C, ecParams); 
              
          objIds.put("GostR3410-2001-CryptoPro-A", CryptoProObjectIdentifiers.gostR3410_2001_CryptoPro_A);
          objIds.put("GostR3410-2001-CryptoPro-B", CryptoProObjectIdentifiers.gostR3410_2001_CryptoPro_B);
          objIds.put("GostR3410-2001-CryptoPro-C", CryptoProObjectIdentifiers.gostR3410_2001_CryptoPro_C);
          objIds.put("GostR3410-2001-CryptoPro-XchA", CryptoProObjectIdentifiers.gostR3410_2001_CryptoPro_XchA);
          objIds.put("GostR3410-2001-CryptoPro-XchB", CryptoProObjectIdentifiers.gostR3410_2001_CryptoPro_XchB);
          
          names.put(CryptoProObjectIdentifiers.gostR3410_2001_CryptoPro_A, "GostR3410-2001-CryptoPro-A");
          names.put(CryptoProObjectIdentifiers.gostR3410_2001_CryptoPro_B, "GostR3410-2001-CryptoPro-B");
          names.put(CryptoProObjectIdentifiers.gostR3410_2001_CryptoPro_C, "GostR3410-2001-CryptoPro-C");
          names.put(CryptoProObjectIdentifiers.gostR3410_2001_CryptoPro_XchA, "GostR3410-2001-CryptoPro-XchA");
          names.put(CryptoProObjectIdentifiers.gostR3410_2001_CryptoPro_XchB, "GostR3410-2001-CryptoPro-XchB");
      }
  
      /**
       * return the ECDomainParameters object for the given OID, null if it 
       * isn't present.
       *
       * @param oid an object identifier representing a named parameters, if present.
       */
      public static ECDomainParameters getByOID(
          ASN1ObjectIdentifier  oid)
      {
          return (ECDomainParameters)params.get(oid);
      }
  
      /**
       * returns an enumeration containing the name strings for parameters
       * contained in this structure.
       */
      public static Enumeration getNames()
      {
          return objIds.keys();
      }
  
      public static ECDomainParameters getByName(
          String  name)
      {
          ASN1ObjectIdentifier oid = (ASN1ObjectIdentifier)objIds.get(name);
  
          if (oid != null)
          {
              return (ECDomainParameters)params.get(oid);
          }
  
          return null;
      }
  
      /**
       * return the named curve name represented by the given object identifier.
       */
      public static String getName(
          ASN1ObjectIdentifier  oid)
      {
          return (String)names.get(oid);
      }
      
      public static ASN1ObjectIdentifier getOID(String name)
      {
          return (ASN1ObjectIdentifier)objIds.get(name);
      }
  }
  