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());
}
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);
}