secnamedcurves.java

内容:基于jdk1.4的加密算法的具体实现

     */
    // m = 283, k1 = 5, k2 = 7, k3 = 12
    static final int sect283r1m = 283;
    static final int sect283r1k1 = 5;
    static final int sect283r1k2 = 7;
    static final int sect283r1k3 = 12;

    // a = 1
    static final BigInteger sect283r1a = ECConstants.ONE; 

    // b = 27b680ac8b8596da5a4af8a19a0303fca97fd7645309fa2a581485af6263e313b79a2f5
    static final BigInteger sect283r1b = new BigInteger("27b680ac8b8596da5a4af8a19a0303fca97fd7645309fa2a581485af6263e313b79a2f5", 16); 
    
    static final ECCurve sect283r1Curve = new ECCurve.F2m(sect283r1m, sect283r1k1, sect283r1k2, sect283r1k3, sect283r1a, sect283r1b);

    // x = 5f939258db7dd90e1934f8c70b0dfec2eed25b8557eac9c80e2e198f8cdbecd86b12053
    static final ECFieldElement sect283r1x = new ECFieldElement.F2m(
        sect283r1m, sect283r1k1, sect283r1k2, sect283r1k3,
        new BigInteger("5f939258db7dd90e1934f8c70b0dfec2eed25b8557eac9c80e2e198f8cdbecd86b12053", 16));

    // y = 3676854fe24141cb98fe6d4b20d02b4516ff702350eddb0826779c813f0df45be8112f4
    static final ECFieldElement sect283r1y = new ECFieldElement.F2m(
        sect283r1m, sect283r1k1, sect283r1k2, sect283r1k3,
        new BigInteger("3676854fe24141cb98fe6d4b20d02b4516ff702350eddb0826779c813f0df45be8112f4", 16));

    static final ECPoint sect283r1BasePoint = new ECPoint.F2m(
            sect283r1Curve, sect283r1x, sect283r1y, false);

    static final BigInteger sect283r1n = new BigInteger("7770675568902916283677847627294075626569625924376904889109196526770044277787378692871");

    static final BigInteger sect283r1h = new BigInteger("2");

    static final byte[] sect283r1Seed = null;
    
    static final X9ECParameters sect283r1 = new X9ECParameters(
            sect283r1Curve,
            sect283r1BasePoint,
            sect283r1n,
            sect283r1h,
            sect283r1Seed);


    /*
     * sect409r1 (NIST - B-409)
     */
    // m = 409, k1 = 87, k2 = 0, k3 = 0
    static final int sect409r1m = 409;
    static final int sect409r1k1 = 87;
    static final int sect409r1k2 = 0;
    static final int sect409r1k3 = 0;

    // a = 1
    static final BigInteger sect409r1a = ECConstants.ONE; 

    // b = 21a5c2c8ee9feb5c4b9a753b7b476b7fd6422ef1f3dd674761fa99d6ac27c8a9a197b272822f6cd57a55aa4f50ae317b13545f
    static final BigInteger sect409r1b = new BigInteger("21a5c2c8ee9feb5c4b9a753b7b476b7fd6422ef1f3dd674761fa99d6ac27c8a9a197b272822f6cd57a55aa4f50ae317b13545f", 16); 

    static final ECCurve sect409r1Curve = new ECCurve.F2m(sect409r1m, sect409r1k1, sect409r1k2, sect409r1k3, sect409r1a, sect409r1b);

    // x = 15d4860d088ddb3496b0c6064756260441cde4af1771d4db01ffe5b34e59703dc255a868a1180515603aeab60794e54bb7996a7
    static final ECFieldElement sect409r1x = new ECFieldElement.F2m(
            sect409r1m, sect409r1k1, sect409r1k2, sect409r1k3,
        new BigInteger("15d4860d088ddb3496b0c6064756260441cde4af1771d4db01ffe5b34e59703dc255a868a1180515603aeab60794e54bb7996a7", 16));

    // y = 61b1cfab6be5f32bbfa78324ed106a7636b9c5a7bd198d0158aa4f5488d08f38514f1fdf4b4f40d2181b3681c364ba0273c706
    static final ECFieldElement sect409r1y = new ECFieldElement.F2m(
            sect409r1m, sect409r1k1, sect409r1k2, sect409r1k3,
        new BigInteger("61b1cfab6be5f32bbfa78324ed106a7636b9c5a7bd198d0158aa4f5488d08f38514f1fdf4b4f40d2181b3681c364ba0273c706", 16));

    static final ECPoint sect409r1BasePoint = new ECPoint.F2m(
            sect409r1Curve, sect409r1x, sect409r1y, false);

    static final BigInteger sect409r1n = new BigInteger("661055968790248598951915308032771039828404682964281219284648798304157774827374805208143723762179110965979867288366567526771");

    static final BigInteger sect409r1h = new BigInteger("2");

    static final byte[] sect409r1Seed = null;
    
    static final X9ECParameters sect409r1 = new X9ECParameters(
            sect409r1Curve,
            sect409r1BasePoint,
            sect409r1n,
            sect409r1h,
            sect409r1Seed);


    /*
     * sect571r1 (NIST - B-571)
     */
    // m = 571, k1 = 2, k2 = 5, k3 = 10
    static final int sect571r1m = 571;
    static final int sect571r1k1 = 2;
    static final int sect571r1k2 = 5;
    static final int sect571r1k3 = 10;

    // a = 1
    static final BigInteger sect571r1a = ECConstants.ONE; 

    // b = 2f40e7e2221f295de297117b7f3d62f5c6a97ffcb8ceff1cd6ba8ce4a9a18ad84ffabbd8efa59332be7ad6756a66e294afd185a78ff12aa520e4de739baca0c7ffeff7f2955727a
    static final BigInteger sect571r1b = new BigInteger("2f40e7e2221f295de297117b7f3d62f5c6a97ffcb8ceff1cd6ba8ce4a9a18ad84ffabbd8efa59332be7ad6756a66e294afd185a78ff12aa520e4de739baca0c7ffeff7f2955727a", 16); 

    static final ECCurve sect571r1Curve = new ECCurve.F2m(sect571r1m, sect571r1k1, sect571r1k2, sect571r1k3, sect571r1a, sect571r1b);

    // x = 303001d34b856296c16c0d40d3cd7750a93d1d2955fa80aa5f40fc8db7b2abdbde53950f4c0d293cdd711a35b67fb1499ae60038614f1394abfa3b4c850d927e1e7769c8eec2d19
    static final ECFieldElement sect571r1x = new ECFieldElement.F2m(
            sect571r1m, sect571r1k1, sect571r1k2, sect571r1k3,
        new BigInteger("303001d34b856296c16c0d40d3cd7750a93d1d2955fa80aa5f40fc8db7b2abdbde53950f4c0d293cdd711a35b67fb1499ae60038614f1394abfa3b4c850d927e1e7769c8eec2d19", 16));

    // y = 37bf27342da639b6dccfffeb73d69d78c6c27a6009cbbca1980f8533921e8a684423e43bab08a576291af8f461bb2a8b3531d2f0485c19b16e2f1516e23dd3c1a4827af1b8ac15b
    static final ECFieldElement sect571r1y = new ECFieldElement.F2m(
            sect571r1m, sect571r1k1, sect571r1k2, sect571r1k3,
        new BigInteger("37bf27342da639b6dccfffeb73d69d78c6c27a6009cbbca1980f8533921e8a684423e43bab08a576291af8f461bb2a8b3531d2f0485c19b16e2f1516e23dd3c1a4827af1b8ac15b", 16));

    static final ECPoint sect571r1BasePoint = new ECPoint.F2m(
            sect571r1Curve, sect571r1x, sect571r1y, false);

    static final BigInteger sect571r1n = new BigInteger("3864537523017258344695351890931987344298927329706434998657235251451519142289560424536143999389415773083133881121926944486246872462816813070234528288303332411393191105285703");

    static final BigInteger sect571r1h = new BigInteger("2");

    static final byte[] sect571r1Seed = null;
    
    static final X9ECParameters sect571r1 = new X9ECParameters(
            sect571r1Curve,
            sect571r1BasePoint,
            sect571r1n,
            sect571r1h,
            sect571r1Seed);


    static final Hashtable objIds = new Hashtable();
    static final Hashtable curves = new Hashtable();
    static final Hashtable names = new Hashtable();

    static
    {
        objIds.put("sect571r1", SECObjectIdentifiers.sect571r1);
        objIds.put("sect409r1", SECObjectIdentifiers.sect409r1);       
        objIds.put("sect283r1", SECObjectIdentifiers.sect283r1);
        objIds.put("sect233r1", SECObjectIdentifiers.sect233r1);
        objIds.put("sect163r2", SECObjectIdentifiers.sect163r2);       
        objIds.put("secp521r1", SECObjectIdentifiers.secp521r1);       
        objIds.put("secp256r1", SECObjectIdentifiers.secp256r1);   
        objIds.put("secp224r1", SECObjectIdentifiers.secp224r1); 

        names.put(SECObjectIdentifiers.sect571r1, "sect571r1");
        names.put(SECObjectIdentifiers.sect409r1, "sect409r1");       
        names.put(SECObjectIdentifiers.sect283r1, "sect283r1");
        names.put(SECObjectIdentifiers.sect233r1, "sect233r1");
        names.put(SECObjectIdentifiers.sect163r2, "sect163r2");       
        names.put(SECObjectIdentifiers.secp521r1, "secp521r1");       
        names.put(SECObjectIdentifiers.secp256r1, "secp256r1"); 
        names.put(SECObjectIdentifiers.secp224r1, "secp224r1");

        curves.put(SECObjectIdentifiers.sect571r1, sect571r1);
        curves.put(SECObjectIdentifiers.sect409r1, sect409r1);       
        curves.put(SECObjectIdentifiers.sect283r1, sect283r1);
        curves.put(SECObjectIdentifiers.sect233r1, sect233r1);
        curves.put(SECObjectIdentifiers.sect163r2, sect163r2);       
        curves.put(SECObjectIdentifiers.secp521r1, secp521r1); 
        curves.put(SECObjectIdentifiers.secp256r1, secp256r1);
        curves.put(SECObjectIdentifiers.secp224r1, secp224r1);             
    }
    
    public static X9ECParameters getByName(
        String  name)
    {
        DERObjectIdentifier oid = (DERObjectIdentifier)objIds.get(name.toLowerCase());

        if (oid != null)
        {
            return (X9ECParameters)curves.get(oid);
        }

        return null;
    }

    /**
     * return the X9ECParameters object for the named curve represented by
     * the passed in object identifier. Null if the curve isn't present.
     *
     * @param oid an object identifier representing a named curve, if present.
     */
    public static X9ECParameters getByOID(
        DERObjectIdentifier  oid)
    {
        return (X9ECParameters)curves.get(oid);
    }

    /**
     * return the object identifier signified by the passed in name. Null
     * if there is no object identifier associated with name.
     *
     * @return the object identifier associated with name, if present.
     */
    public static DERObjectIdentifier getOID(
        String  name)
    {
        return (DERObjectIdentifier)objIds.get(name);
    }

    /**
     * return the named curve name represented by the given object identifier.
     */
    public static String getName(
        DERObjectIdentifier  oid)
    {
        return (String)names.get(oid);
    }

    /**
     * returns an enumeration containing the name strings for curves
     * contained in this structure.
     */
    public static Enumeration getNames()
    {
        return objIds.keys();
    }
}