@Override public synchronized int read(byte[] b, int off, int len) throws IOException { if (len == 1) { int c = read(); if (c == -1) { return -1; } b[off] = (byte) c; return 1; } if (buffer.available() == 0) { int nb = this.in.read(b, off, len); if (nb == -1) { return nb; } buffer.putRawBytes(b, off, nb); } int nb = 0; for (int curPos = off; (nb < len) && (buffer.available() > 0); nb++, curPos++) { b[curPos] = (byte) read(); } return nb; }
@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; } }