package org.bouncycastle.jce.spec;

import java.security.spec.AlgorithmParameterSpec;

import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.cryptopro.CryptoProObjectIdentifiers;
import org.bouncycastle.asn1.cryptopro.GOST3410NamedParameters;
import org.bouncycastle.asn1.cryptopro.GOST3410ParamSetParameters;
import org.bouncycastle.asn1.cryptopro.GOST3410PublicKeyAlgParameters;
import org.bouncycastle.jce.interfaces.GOST3410Params;

ParameterSpec for a GOST 3410-94 key.
/** * ParameterSpec for a GOST 3410-94 key. */
public class GOST3410ParameterSpec implements AlgorithmParameterSpec, GOST3410Params { private GOST3410PublicKeyParameterSetSpec keyParameters; private String keyParamSetOID; private String digestParamSetOID; private String encryptionParamSetOID; public GOST3410ParameterSpec( String keyParamSetID, String digestParamSetOID, String encryptionParamSetOID) { GOST3410ParamSetParameters ecP = null; try { ecP = GOST3410NamedParameters.getByOID(new DERObjectIdentifier(keyParamSetID)); } catch (IllegalArgumentException e) { DERObjectIdentifier oid = GOST3410NamedParameters.getOID(keyParamSetID); if (oid != null) { keyParamSetID = oid.getId(); ecP = GOST3410NamedParameters.getByOID(oid); } } if (ecP == null) { throw new IllegalArgumentException("no key parameter set for passed in name/OID."); } this.keyParameters = new GOST3410PublicKeyParameterSetSpec( ecP.getP(), ecP.getQ(), ecP.getA()); this.keyParamSetOID = keyParamSetID; this.digestParamSetOID = digestParamSetOID; this.encryptionParamSetOID = encryptionParamSetOID; } public GOST3410ParameterSpec( String keyParamSetID, String digestParamSetOID) { this(keyParamSetID, digestParamSetOID, null); } public GOST3410ParameterSpec( String keyParamSetID) { this(keyParamSetID, CryptoProObjectIdentifiers.gostR3411_94_CryptoProParamSet.getId(), null); } public GOST3410ParameterSpec( GOST3410PublicKeyParameterSetSpec spec) { this.keyParameters = spec; this.digestParamSetOID = CryptoProObjectIdentifiers.gostR3411_94_CryptoProParamSet.getId(); this.encryptionParamSetOID = null; } public String getPublicKeyParamSetOID() { return this.keyParamSetOID; } public GOST3410PublicKeyParameterSetSpec getPublicKeyParameters() { return keyParameters; } public String getDigestParamSetOID() { return this.digestParamSetOID; } public String getEncryptionParamSetOID() { return this.encryptionParamSetOID; } public boolean equals(Object o) { if (o instanceof GOST3410ParameterSpec) { GOST3410ParameterSpec other = (GOST3410ParameterSpec)o; return this.keyParameters.equals(other.keyParameters) && this.digestParamSetOID.equals(other.digestParamSetOID) && (this.encryptionParamSetOID == other.encryptionParamSetOID || (this.encryptionParamSetOID != null && this.encryptionParamSetOID.equals(other.encryptionParamSetOID))); } return false; } public int hashCode() { return this.keyParameters.hashCode() ^ this.digestParamSetOID.hashCode() ^ (this.encryptionParamSetOID != null ? this.encryptionParamSetOID.hashCode() : 0); } public static GOST3410ParameterSpec fromPublicKeyAlg( GOST3410PublicKeyAlgParameters params) { if (params.getEncryptionParamSet() != null) { return new GOST3410ParameterSpec(params.getPublicKeyParamSet().getId(), params.getDigestParamSet().getId(), params.getEncryptionParamSet().getId()); } else { return new GOST3410ParameterSpec(params.getPublicKeyParamSet().getId(), params.getDigestParamSet().getId()); } } }