@Override
public Boolean doAuth(Buffer buffer, boolean init) throws Exception {
ValidateUtils.checkTrue(init, "Instance not initialized");
boolean hasSig = buffer.getBoolean();
String alg = buffer.getString();
int oldLim = buffer.wpos();
int oldPos = buffer.rpos();
int len = buffer.getInt();
buffer.wpos(buffer.rpos() + len);
PublicKey key = buffer.getRawPublicKey();
ServerFactoryManager manager = session.getFactoryManager();
Signature verif =
ValidateUtils.checkNotNull(
NamedFactory.Utils.create(manager.getSignatureFactories(), alg),
"No verifier located for algorithm=%s",
alg);
verif.initVerifier(key);
buffer.wpos(oldLim);
byte[] sig = hasSig ? buffer.getBytes() : null;
PublickeyAuthenticator authenticator =
ValidateUtils.checkNotNull(
manager.getPublickeyAuthenticator(), "No PublickeyAuthenticator configured");
if (!authenticator.authenticate(username, key, session)) {
return Boolean.FALSE;
}
if (!hasSig) {
Buffer buf = session.createBuffer(SshConstants.SSH_MSG_USERAUTH_PK_OK);
buf.putString(alg);
buf.putRawBytes(buffer.array(), oldPos, 4 + len);
session.writePacket(buf);
return null;
} else {
Buffer buf = new ByteArrayBuffer();
buf.putBytes(session.getKex().getH());
buf.putByte(SshConstants.SSH_MSG_USERAUTH_REQUEST);
buf.putString(username);
buf.putString(service);
buf.putString(UserAuthPublicKeyFactory.NAME);
buf.putBoolean(true);
buf.putString(alg);
buffer.rpos(oldPos);
buffer.wpos(oldPos + 4 + len);
buf.putBuffer(buffer);
verif.update(buf.array(), buf.rpos(), buf.available());
if (!verif.verify(sig)) {
throw new Exception("Key verification failed");
}
return Boolean.TRUE;
}
}
protected Pair<String, Collection<byte[]>> doGetHash(
Object target, Collection<String> algorithms, long offset, long length, int blockSize)
throws IOException {
Buffer buffer = getCommandBuffer(target, Byte.MAX_VALUE);
putTarget(buffer, target);
buffer.putString(GenericUtils.join(algorithms, ','));
buffer.putLong(offset);
buffer.putLong(length);
buffer.putInt(blockSize);
if (log.isDebugEnabled()) {
log.debug(
"doGetHash({})[{}] - offset={}, length={}, block-size={}",
getName(),
(target instanceof CharSequence)
? target
: BufferUtils.toHex(BufferUtils.EMPTY_HEX_SEPARATOR, (byte[]) target),
offset,
length,
blockSize);
}
buffer = checkExtendedReplyBuffer(receive(sendExtendedCommand(buffer)));
if (buffer == null) {
throw new StreamCorruptedException("Missing extended reply data");
}
String targetType = buffer.getString();
if (String.CASE_INSENSITIVE_ORDER.compare(targetType, SftpConstants.EXT_CHECK_FILE) != 0) {
throw new StreamCorruptedException(
"Mismatched reply type: expected="
+ SftpConstants.EXT_CHECK_FILE
+ ", actual="
+ targetType);
}
String algo = buffer.getString();
Collection<byte[]> hashes = new LinkedList<>();
while (buffer.available() > 0) {
byte[] hashValue = buffer.getBytes();
hashes.add(hashValue);
}
return new Pair<String, Collection<byte[]>>(algo, hashes);
}