111 lines
6.8 KiB
Java
111 lines
6.8 KiB
Java
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package org.bouncycastle.crypto.util;
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import java.io.IOException;
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import java.io.InputStream;
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import java.math.BigInteger;
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import org.bouncycastle.asn1.ASN1Encodable;
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import org.bouncycastle.asn1.ASN1InputStream;
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import org.bouncycastle.asn1.ASN1Integer;
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import org.bouncycastle.asn1.ASN1ObjectIdentifier;
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import org.bouncycastle.asn1.ASN1Primitive;
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import org.bouncycastle.asn1.DEROctetString;
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import org.bouncycastle.asn1.oiw.ElGamalParameter;
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import org.bouncycastle.asn1.oiw.OIWObjectIdentifiers;
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import org.bouncycastle.asn1.pkcs.DHParameter;
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import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
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import org.bouncycastle.asn1.pkcs.RSAPublicKey;
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import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
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import org.bouncycastle.asn1.x509.DSAParameter;
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import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
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import org.bouncycastle.asn1.x509.X509ObjectIdentifiers;
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import org.bouncycastle.asn1.x9.DHPublicKey;
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import org.bouncycastle.asn1.x9.DomainParameters;
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import org.bouncycastle.asn1.x9.ECNamedCurveTable;
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import org.bouncycastle.asn1.x9.ValidationParams;
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import org.bouncycastle.asn1.x9.X962Parameters;
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import org.bouncycastle.asn1.x9.X9ECParameters;
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import org.bouncycastle.asn1.x9.X9ECPoint;
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import org.bouncycastle.asn1.x9.X9ObjectIdentifiers;
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import org.bouncycastle.crypto.ec.CustomNamedCurves;
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import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
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import org.bouncycastle.crypto.params.DHParameters;
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import org.bouncycastle.crypto.params.DHPublicKeyParameters;
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import org.bouncycastle.crypto.params.DHValidationParameters;
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import org.bouncycastle.crypto.params.DSAParameters;
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import org.bouncycastle.crypto.params.DSAPublicKeyParameters;
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import org.bouncycastle.crypto.params.ECDomainParameters;
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import org.bouncycastle.crypto.params.ECNamedDomainParameters;
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import org.bouncycastle.crypto.params.ECPublicKeyParameters;
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import org.bouncycastle.crypto.params.ElGamalParameters;
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import org.bouncycastle.crypto.params.ElGamalPublicKeyParameters;
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import org.bouncycastle.crypto.params.RSAKeyParameters;
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/* loaded from: classes6.dex */
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public class PublicKeyFactory {
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public static AsymmetricKeyParameter createKey(byte[] bArr) throws IOException {
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return createKey(SubjectPublicKeyInfo.getInstance(ASN1Primitive.fromByteArray(bArr)));
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}
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public static AsymmetricKeyParameter createKey(SubjectPublicKeyInfo subjectPublicKeyInfo) throws IOException {
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X9ECParameters x9ECParameters;
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ECDomainParameters eCDomainParameters;
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AlgorithmIdentifier algorithm = subjectPublicKeyInfo.getAlgorithm();
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if (algorithm.getAlgorithm().equals(PKCSObjectIdentifiers.rsaEncryption) || algorithm.getAlgorithm().equals(X509ObjectIdentifiers.id_ea_rsa)) {
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RSAPublicKey rSAPublicKey = RSAPublicKey.getInstance(subjectPublicKeyInfo.parsePublicKey());
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return new RSAKeyParameters(false, rSAPublicKey.getModulus(), rSAPublicKey.getPublicExponent());
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}
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DSAParameters dSAParameters = null;
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if (algorithm.getAlgorithm().equals(X9ObjectIdentifiers.dhpublicnumber)) {
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BigInteger y = DHPublicKey.getInstance(subjectPublicKeyInfo.parsePublicKey()).getY();
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DomainParameters domainParameters = DomainParameters.getInstance(algorithm.getParameters());
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BigInteger p = domainParameters.getP();
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BigInteger g = domainParameters.getG();
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BigInteger q = domainParameters.getQ();
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BigInteger j = domainParameters.getJ() != null ? domainParameters.getJ() : null;
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ValidationParams validationParams = domainParameters.getValidationParams();
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return new DHPublicKeyParameters(y, new DHParameters(p, g, q, j, validationParams != null ? new DHValidationParameters(validationParams.getSeed(), validationParams.getPgenCounter().intValue()) : null));
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}
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if (algorithm.getAlgorithm().equals(PKCSObjectIdentifiers.dhKeyAgreement)) {
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DHParameter dHParameter = DHParameter.getInstance(algorithm.getParameters());
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ASN1Integer aSN1Integer = (ASN1Integer) subjectPublicKeyInfo.parsePublicKey();
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BigInteger l = dHParameter.getL();
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return new DHPublicKeyParameters(aSN1Integer.getValue(), new DHParameters(dHParameter.getP(), dHParameter.getG(), null, l != null ? l.intValue() : 0));
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}
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if (algorithm.getAlgorithm().equals(OIWObjectIdentifiers.elGamalAlgorithm)) {
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ElGamalParameter elGamalParameter = ElGamalParameter.getInstance(algorithm.getParameters());
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return new ElGamalPublicKeyParameters(((ASN1Integer) subjectPublicKeyInfo.parsePublicKey()).getValue(), new ElGamalParameters(elGamalParameter.getP(), elGamalParameter.getG()));
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}
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if (algorithm.getAlgorithm().equals(X9ObjectIdentifiers.id_dsa) || algorithm.getAlgorithm().equals(OIWObjectIdentifiers.dsaWithSHA1)) {
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ASN1Integer aSN1Integer2 = (ASN1Integer) subjectPublicKeyInfo.parsePublicKey();
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ASN1Encodable parameters = algorithm.getParameters();
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if (parameters != null) {
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DSAParameter dSAParameter = DSAParameter.getInstance(parameters.toASN1Primitive());
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dSAParameters = new DSAParameters(dSAParameter.getP(), dSAParameter.getQ(), dSAParameter.getG());
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}
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return new DSAPublicKeyParameters(aSN1Integer2.getValue(), dSAParameters);
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}
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if (!algorithm.getAlgorithm().equals(X9ObjectIdentifiers.id_ecPublicKey)) {
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throw new RuntimeException("algorithm identifier in key not recognised");
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}
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X962Parameters x962Parameters = X962Parameters.getInstance(algorithm.getParameters());
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boolean isNamedCurve = x962Parameters.isNamedCurve();
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ASN1Primitive parameters2 = x962Parameters.getParameters();
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if (isNamedCurve) {
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ASN1ObjectIdentifier aSN1ObjectIdentifier = (ASN1ObjectIdentifier) parameters2;
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x9ECParameters = CustomNamedCurves.getByOID(aSN1ObjectIdentifier);
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if (x9ECParameters == null) {
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x9ECParameters = ECNamedCurveTable.getByOID(aSN1ObjectIdentifier);
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}
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eCDomainParameters = new ECNamedDomainParameters(aSN1ObjectIdentifier, x9ECParameters.getCurve(), x9ECParameters.getG(), x9ECParameters.getN(), x9ECParameters.getH(), x9ECParameters.getSeed());
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} else {
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x9ECParameters = X9ECParameters.getInstance(parameters2);
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eCDomainParameters = new ECDomainParameters(x9ECParameters.getCurve(), x9ECParameters.getG(), x9ECParameters.getN(), x9ECParameters.getH(), x9ECParameters.getSeed());
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}
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return new ECPublicKeyParameters(new X9ECPoint(x9ECParameters.getCurve(), new DEROctetString(subjectPublicKeyInfo.getPublicKeyData().getBytes())).getPoint(), eCDomainParameters);
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}
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public static AsymmetricKeyParameter createKey(InputStream inputStream) throws IOException {
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return createKey(SubjectPublicKeyInfo.getInstance(new ASN1InputStream(inputStream).readObject()));
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}
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}
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