diff options
Diffstat (limited to 'core/src/main/java/org/spongycastle/asn1/cryptopro/ECGOST3410NamedCurves.java')
-rw-r--r-- | core/src/main/java/org/spongycastle/asn1/cryptopro/ECGOST3410NamedCurves.java | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/asn1/cryptopro/ECGOST3410NamedCurves.java b/core/src/main/java/org/spongycastle/asn1/cryptopro/ECGOST3410NamedCurves.java new file mode 100644 index 00000000..db64c138 --- /dev/null +++ b/core/src/main/java/org/spongycastle/asn1/cryptopro/ECGOST3410NamedCurves.java @@ -0,0 +1,177 @@ +package org.spongycastle.asn1.cryptopro; + +import java.math.BigInteger; +import java.util.Enumeration; +import java.util.Hashtable; + +import org.spongycastle.asn1.ASN1ObjectIdentifier; +import org.spongycastle.crypto.params.ECDomainParameters; +import org.spongycastle.math.ec.ECConstants; +import org.spongycastle.math.ec.ECCurve; + +/** + * 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 + mod_q, + ECConstants.ONE); + + ECDomainParameters ecParams = new ECDomainParameters( + curve, + curve.createPoint( + new BigInteger("1"), // x + 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"), + mod_q, + ECConstants.ONE); + + ecParams = new ECDomainParameters( + curve, + curve.createPoint( + new BigInteger("1"), // x + 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 + mod_q, + ECConstants.ONE); + + ecParams = new ECDomainParameters( + curve, + curve.createPoint( + new BigInteger("1"), // x + 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"), + mod_q, + ECConstants.ONE); + + ecParams = new ECDomainParameters( + curve, + curve.createPoint( + new BigInteger("0"), + 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 + mod_q, + ECConstants.ONE); + + ecParams = new ECDomainParameters( + curve, + curve.createPoint( + new BigInteger("0"), // x + 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); + } +} |