use of org.bouncycastle.asn1.x9.DHDomainParameters in project robovm by robovm.
the class PublicKeyFactory method createKey.
/**
* Create a public key from the passed in SubjectPublicKeyInfo
*
* @param keyInfo the SubjectPublicKeyInfo containing the key data
* @return the appropriate key parameter
* @throws IOException on an error decoding the key
*/
public static AsymmetricKeyParameter createKey(SubjectPublicKeyInfo keyInfo) throws IOException {
AlgorithmIdentifier algId = keyInfo.getAlgorithm();
if (algId.getAlgorithm().equals(PKCSObjectIdentifiers.rsaEncryption) || algId.getAlgorithm().equals(X509ObjectIdentifiers.id_ea_rsa)) {
RSAPublicKey pubKey = RSAPublicKey.getInstance(keyInfo.parsePublicKey());
return new RSAKeyParameters(false, pubKey.getModulus(), pubKey.getPublicExponent());
} else if (algId.getAlgorithm().equals(X9ObjectIdentifiers.dhpublicnumber)) {
DHPublicKey dhPublicKey = DHPublicKey.getInstance(keyInfo.parsePublicKey());
BigInteger y = dhPublicKey.getY().getValue();
DHDomainParameters dhParams = DHDomainParameters.getInstance(algId.getParameters());
BigInteger p = dhParams.getP().getValue();
BigInteger g = dhParams.getG().getValue();
BigInteger q = dhParams.getQ().getValue();
BigInteger j = null;
if (dhParams.getJ() != null) {
j = dhParams.getJ().getValue();
}
DHValidationParameters validation = null;
DHValidationParms dhValidationParms = dhParams.getValidationParms();
if (dhValidationParms != null) {
byte[] seed = dhValidationParms.getSeed().getBytes();
BigInteger pgenCounter = dhValidationParms.getPgenCounter().getValue();
// TODO Check pgenCounter size?
validation = new DHValidationParameters(seed, pgenCounter.intValue());
}
return new DHPublicKeyParameters(y, new DHParameters(p, g, q, j, validation));
} else if (algId.getAlgorithm().equals(PKCSObjectIdentifiers.dhKeyAgreement)) {
DHParameter params = DHParameter.getInstance(algId.getParameters());
ASN1Integer derY = (ASN1Integer) keyInfo.parsePublicKey();
BigInteger lVal = params.getL();
int l = lVal == null ? 0 : lVal.intValue();
DHParameters dhParams = new DHParameters(params.getP(), params.getG(), null, l);
return new DHPublicKeyParameters(derY.getValue(), dhParams);
} else // END android-removed
if (algId.getAlgorithm().equals(X9ObjectIdentifiers.id_dsa) || algId.getAlgorithm().equals(OIWObjectIdentifiers.dsaWithSHA1)) {
ASN1Integer derY = (ASN1Integer) keyInfo.parsePublicKey();
ASN1Encodable de = algId.getParameters();
DSAParameters parameters = null;
if (de != null) {
DSAParameter params = DSAParameter.getInstance(de.toASN1Primitive());
parameters = new DSAParameters(params.getP(), params.getQ(), params.getG());
}
return new DSAPublicKeyParameters(derY.getValue(), parameters);
} else if (algId.getAlgorithm().equals(X9ObjectIdentifiers.id_ecPublicKey)) {
X962Parameters params = new X962Parameters((ASN1Primitive) algId.getParameters());
X9ECParameters x9;
if (params.isNamedCurve()) {
ASN1ObjectIdentifier oid = (ASN1ObjectIdentifier) params.getParameters();
x9 = X962NamedCurves.getByOID(oid);
if (x9 == null) {
x9 = SECNamedCurves.getByOID(oid);
if (x9 == null) {
x9 = NISTNamedCurves.getByOID(oid);
// BEGIN android-removed
// if (x9 == null)
// {
// x9 = TeleTrusTNamedCurves.getByOID(oid);
// }
// END android-removed
}
}
} else {
x9 = X9ECParameters.getInstance(params.getParameters());
}
ASN1OctetString key = new DEROctetString(keyInfo.getPublicKeyData().getBytes());
X9ECPoint derQ = new X9ECPoint(x9.getCurve(), key);
// TODO We lose any named parameters here
ECDomainParameters dParams = new ECDomainParameters(x9.getCurve(), x9.getG(), x9.getN(), x9.getH(), x9.getSeed());
return new ECPublicKeyParameters(derQ.getPoint(), dParams);
} else {
throw new RuntimeException("algorithm identifier in key not recognised");
}
}
use of org.bouncycastle.asn1.x9.DHDomainParameters in project XobotOS by xamarin.
the class PublicKeyFactory method createKey.
/**
* Create a public key from the passed in SubjectPublicKeyInfo
*
* @param keyInfo the SubjectPublicKeyInfo containing the key data
* @return the appropriate key parameter
* @throws IOException on an error decoding the key
*/
public static AsymmetricKeyParameter createKey(SubjectPublicKeyInfo keyInfo) throws IOException {
AlgorithmIdentifier algId = keyInfo.getAlgorithmId();
if (algId.getObjectId().equals(PKCSObjectIdentifiers.rsaEncryption) || algId.getObjectId().equals(X509ObjectIdentifiers.id_ea_rsa)) {
RSAPublicKeyStructure pubKey = new RSAPublicKeyStructure((ASN1Sequence) keyInfo.getPublicKey());
return new RSAKeyParameters(false, pubKey.getModulus(), pubKey.getPublicExponent());
} else if (algId.getObjectId().equals(X9ObjectIdentifiers.dhpublicnumber)) {
DHPublicKey dhPublicKey = DHPublicKey.getInstance(keyInfo.getPublicKey());
BigInteger y = dhPublicKey.getY().getValue();
DHDomainParameters dhParams = DHDomainParameters.getInstance(keyInfo.getAlgorithmId().getParameters());
BigInteger p = dhParams.getP().getValue();
BigInteger g = dhParams.getG().getValue();
BigInteger q = dhParams.getQ().getValue();
BigInteger j = null;
if (dhParams.getJ() != null) {
j = dhParams.getJ().getValue();
}
DHValidationParameters validation = null;
DHValidationParms dhValidationParms = dhParams.getValidationParms();
if (dhValidationParms != null) {
byte[] seed = dhValidationParms.getSeed().getBytes();
BigInteger pgenCounter = dhValidationParms.getPgenCounter().getValue();
// TODO Check pgenCounter size?
validation = new DHValidationParameters(seed, pgenCounter.intValue());
}
return new DHPublicKeyParameters(y, new DHParameters(p, g, q, j, validation));
} else if (algId.getObjectId().equals(PKCSObjectIdentifiers.dhKeyAgreement)) {
DHParameter params = new DHParameter((ASN1Sequence) keyInfo.getAlgorithmId().getParameters());
DERInteger derY = (DERInteger) keyInfo.getPublicKey();
BigInteger lVal = params.getL();
int l = lVal == null ? 0 : lVal.intValue();
DHParameters dhParams = new DHParameters(params.getP(), params.getG(), null, l);
return new DHPublicKeyParameters(derY.getValue(), dhParams);
} else // END android-removed
if (algId.getObjectId().equals(X9ObjectIdentifiers.id_dsa) || algId.getObjectId().equals(OIWObjectIdentifiers.dsaWithSHA1)) {
DERInteger derY = (DERInteger) keyInfo.getPublicKey();
DEREncodable de = keyInfo.getAlgorithmId().getParameters();
DSAParameters parameters = null;
if (de != null) {
DSAParameter params = DSAParameter.getInstance(de.getDERObject());
parameters = new DSAParameters(params.getP(), params.getQ(), params.getG());
}
return new DSAPublicKeyParameters(derY.getValue(), parameters);
} else if (algId.getObjectId().equals(X9ObjectIdentifiers.id_ecPublicKey)) {
X962Parameters params = new X962Parameters((DERObject) keyInfo.getAlgorithmId().getParameters());
ECDomainParameters dParams = null;
if (params.isNamedCurve()) {
DERObjectIdentifier oid = (DERObjectIdentifier) params.getParameters();
X9ECParameters ecP = X962NamedCurves.getByOID(oid);
if (ecP == null) {
ecP = SECNamedCurves.getByOID(oid);
if (ecP == null) {
ecP = NISTNamedCurves.getByOID(oid);
// BEGIN android-removed
// if (ecP == null)
// {
// ecP = TeleTrusTNamedCurves.getByOID(oid);
// }
// END android-removed
}
}
dParams = new ECDomainParameters(ecP.getCurve(), ecP.getG(), ecP.getN(), ecP.getH(), ecP.getSeed());
} else {
X9ECParameters ecP = new X9ECParameters((ASN1Sequence) params.getParameters());
dParams = new ECDomainParameters(ecP.getCurve(), ecP.getG(), ecP.getN(), ecP.getH(), ecP.getSeed());
}
DERBitString bits = keyInfo.getPublicKeyData();
byte[] data = bits.getBytes();
ASN1OctetString key = new DEROctetString(data);
X9ECPoint derQ = new X9ECPoint(dParams.getCurve(), key);
return new ECPublicKeyParameters(derQ.getPoint(), dParams);
} else {
throw new RuntimeException("algorithm identifier in key not recognised");
}
}
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