public byte[] getEncoded() {
SubjectPublicKeyInfo info =
new SubjectPublicKeyInfo(
new AlgorithmIdentifier(
OIWObjectIdentifiers.elGamalAlgorithm,
new ElGamalParameter(elSpec.getP(), elSpec.getG()).getDERObject()),
new DERInteger(y));
return info.getDEREncoded();
}
JCEElGamalPublicKey(SubjectPublicKeyInfo info) {
ElGamalParameter params =
new ElGamalParameter((ASN1Sequence) info.getAlgorithmId().getParameters());
DERInteger derY = null;
try {
derY = (DERInteger) info.getPublicKey();
} catch (IOException e) {
throw new IllegalArgumentException("invalid info structure in DSA public key");
}
this.y = derY.getValue();
this.elSpec = new ElGamalParameterSpec(params.getP(), params.getG());
}
public byte[] getEncoded() {
SubjectPublicKeyInfo info;
byte[] keyEnc = this.getY().toByteArray();
byte[] keyBytes;
if (keyEnc[0] == 0) {
keyBytes = new byte[keyEnc.length - 1];
} else {
keyBytes = new byte[keyEnc.length];
}
for (int i = 0; i != keyBytes.length; i++) {
keyBytes[i] = keyEnc[keyEnc.length - 1 - i]; // must be little endian
}
if (gost3410Spec instanceof GOST3410ParameterSpec) {
if (gost3410Spec.getEncryptionParamSetOID() != null) {
info =
new SubjectPublicKeyInfo(
new AlgorithmIdentifier(
CryptoProObjectIdentifiers.gostR3410_94,
new GOST3410PublicKeyAlgParameters(
new DERObjectIdentifier(gost3410Spec.getPublicKeyParamSetOID()),
new DERObjectIdentifier(gost3410Spec.getDigestParamSetOID()),
new DERObjectIdentifier(gost3410Spec.getEncryptionParamSetOID()))
.getDERObject()),
new DEROctetString(keyBytes));
} else {
info =
new SubjectPublicKeyInfo(
new AlgorithmIdentifier(
CryptoProObjectIdentifiers.gostR3410_94,
new GOST3410PublicKeyAlgParameters(
new DERObjectIdentifier(gost3410Spec.getPublicKeyParamSetOID()),
new DERObjectIdentifier(gost3410Spec.getDigestParamSetOID()))
.getDERObject()),
new DEROctetString(keyBytes));
}
} else {
info =
new SubjectPublicKeyInfo(
new AlgorithmIdentifier(CryptoProObjectIdentifiers.gostR3410_94),
new DEROctetString(keyBytes));
}
return info.getDEREncoded();
}
JDKGOST3410PublicKey(SubjectPublicKeyInfo info) {
GOST3410PublicKeyAlgParameters params =
new GOST3410PublicKeyAlgParameters((ASN1Sequence) info.getAlgorithmId().getParameters());
DEROctetString derY;
try {
derY = (DEROctetString) info.getPublicKey();
byte[] keyEnc = derY.getOctets();
byte[] keyBytes = new byte[keyEnc.length];
for (int i = 0; i != keyEnc.length; i++) {
keyBytes[i] = keyEnc[keyEnc.length - 1 - i]; // was little endian
}
this.y = new BigInteger(1, keyBytes);
} catch (IOException e) {
throw new IllegalArgumentException("invalid info structure in GOST3410 public key");
}
this.gost3410Spec = GOST3410ParameterSpec.fromPublicKeyAlg(params);
}
