public static void writeRSAPrivateKey(
Writer _out, RSAPrivateCrtKey obj, CipherSpec cipher, char[] passwd) throws IOException {
assert (obj != null);
BufferedWriter out = makeBuffered(_out);
RSAPrivateKeyStructure keyStruct =
new RSAPrivateKeyStructure(
obj.getModulus(),
obj.getPublicExponent(),
obj.getPrivateExponent(),
obj.getPrimeP(),
obj.getPrimeQ(),
obj.getPrimeExponentP(),
obj.getPrimeExponentQ(),
obj.getCrtCoefficient());
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
ASN1OutputStream aOut = new ASN1OutputStream(bOut);
aOut.writeObject(keyStruct);
aOut.close();
byte[] encoding = bOut.toByteArray();
if (cipher != null && passwd != null) {
writePemEncrypted(out, PEM_STRING_RSA, encoding, cipher, passwd);
} else {
writePemPlain(out, PEM_STRING_RSA, encoding);
}
}
public static void writeDSAPrivateKey(
Writer _out, DSAPrivateKey obj, CipherSpec cipher, char[] passwd) throws IOException {
BufferedWriter out = makeBuffered(_out);
PrivateKeyInfo info =
new PrivateKeyInfo((ASN1Sequence) new ASN1InputStream(getEncoded(obj)).readObject());
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
ASN1OutputStream aOut = new ASN1OutputStream(bOut);
DSAParameter p = DSAParameter.getInstance(info.getAlgorithmId().getParameters());
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(new DERInteger(0));
v.add(new DERInteger(p.getP()));
v.add(new DERInteger(p.getQ()));
v.add(new DERInteger(p.getG()));
BigInteger x = obj.getX();
BigInteger y = p.getG().modPow(x, p.getP());
v.add(new DERInteger(y));
v.add(new DERInteger(x));
aOut.writeObject(new DERSequence(v));
byte[] encoding = bOut.toByteArray();
if (cipher != null && passwd != null) {
writePemEncrypted(out, PEM_STRING_DSA, encoding, cipher, passwd);
} else {
writePemPlain(out, PEM_STRING_DSA, encoding);
}
}