public void saveToFile(String fileName, BigInteger mod, BigInteger exp)
throws IOException {
ObjectOutputStream oout = new ObjectOutputStream(
new BufferedOutputStream(new FileOutputStream(fileName)));
try {
oout.writeObject(mod);
oout.writeObject(exp);
} catch (Exception e) {
throw new IOException("Unexpected error", e);
} finally {
oout.close();
}
}
PublicKey ReadPublicKeyFromFile(String keyFileName) throws IOException {
InputStream in = RSACrypt.class.getClassLoader().getResourceAsStream(keyFileName);
ObjectInputStream oin = new ObjectInputStream(new BufferedInputStream(
in));
try {
BigInteger m = (BigInteger) oin.readObject();
BigInteger e = (BigInteger) oin.readObject();
RSAPublicKeySpec keySpec = new RSAPublicKeySpec(m, e);
KeyFactory fact = KeyFactory.getInstance("RSA");
PublicKey pubKey = fact.generatePublic(keySpec);
return pubKey;
} catch (Exception e) {
throw new RuntimeException("Spurious serialisation error", e);
} finally {
oin.close();
}
}
от http://www.developpez.net/forums/d1001867/java/developpement-web-java/besoin-daide-rsa/