* @throws NoSuchAlgorithmException
* @throws InvalidKeySpecException
*/
public static final Map<PublicKey, AuthorizedKey> parseAuthorizedKeys(InputStream is) throws IOException, NoSuchAlgorithmException, InvalidKeySpecException {
try {
Base64 decoder = new Base64();
KeyFactory rsaKeyGen = KeyFactory.getInstance("RSA");
KeyFactory dsaKeyGen = KeyFactory.getInstance("DSA");
LineNumberReader reader = new LineNumberReader(new InputStreamReader(is, "UTF-8"));
Map<PublicKey, AuthorizedKey> ret = new TreeMap<PublicKey, AuthorizedKey>(new PublicKeyComparator());
String line;
while ((line = reader.readLine()) != null) {
if (line.startsWith("#")) {
continue; //skip # lines might be comment
}
String[] tokens = line.split("[ \\t]+", 3);
if (tokens.length != 3) {
throw new IOException("Authorized keys file line " + reader.getLineNumber() + " does not contain 3 tokens.");
}
byte[] rawKey = decoder.decode(tokens[1].getBytes("UTF-8"));
if (getInt(rawKey, 0) != 7 || !new String(rawKey, 4, 7, "UTF-8").equals(tokens[0])) {
throw new IOException("Authorized keys file line " + reader.getLineNumber() + " contains a key with a format that does not match the first token.");
}
PublicKey pk;
if (tokens[0].equals("ssh-dss")) {