private byte[] encrypt(byte[] plain, byte[][] _iv) { if (passphrase == null) { return(plain); } if (cipher == null) { cipher = genCipher(); } byte[] iv = _iv[0] = new byte[cipher.getIVSize()]; if (random == null) { random = genRandom(); } random.fill(iv, 0, iv.Length); byte[] key = genKey(passphrase, iv); byte[] encoded = plain; // PKCS#5Padding { //int bsize=cipher.getBlockSize(); int bsize = cipher.getIVSize(); byte[] foo = new byte[(encoded.Length / bsize + 1) * bsize]; Array.Copy(encoded, 0, foo, 0, encoded.Length); int padding = bsize - encoded.Length % bsize; for (int i = foo.Length - 1; (foo.Length - padding) <= i; i--) { foo[i] = (byte)padding; } encoded = foo; } try { cipher.init(Cipher.ENCRYPT_MODE, key, iv); cipher.update(encoded, 0, encoded.Length, encoded, 0); } catch //(Exception e) { //Console.Error.WriteLine(e); } Util.bzero(key); return(encoded); }
private void updateKeys(KeyExchange kex) { byte[] K = kex.getK(); byte[] H = kex.getH(); HASH hash = kex.getHash(); // string[] guess=kex.guess; if (session_id == null) { session_id = new byte[H.Length]; Array.Copy(H, 0, session_id, 0, H.Length); } /* Initial IV client to server: HASH (K || H || "A" || session_id) Initial IV server to client: HASH (K || H || "B" || session_id) Encryption key client to server: HASH (K || H || "C" || session_id) Encryption key server to client: HASH (K || H || "D" || session_id) Integrity key client to server: HASH (K || H || "E" || session_id) Integrity key server to client: HASH (K || H || "F" || session_id) */ buf.reset(); buf.putMPInt(K); buf.putByte(H); buf.putByte((byte)0x41); buf.putByte(session_id); hash.update(buf.buffer, 0, buf.index); IVc2s = hash.digest(); int j = buf.index - session_id.Length - 1; buf.buffer[j]++; hash.update(buf.buffer, 0, buf.index); IVs2c = hash.digest(); buf.buffer[j]++; hash.update(buf.buffer, 0, buf.index); Ec2s = hash.digest(); buf.buffer[j]++; hash.update(buf.buffer, 0, buf.index); Es2c = hash.digest(); buf.buffer[j]++; hash.update(buf.buffer, 0, buf.index); MACc2s = hash.digest(); buf.buffer[j]++; hash.update(buf.buffer, 0, buf.index); MACs2c = hash.digest(); try { Type c; string method; method = guess[KeyExchange.PROPOSAL_ENC_ALGS_STOC]; c = Type.GetType(getConfig(method)); s2ccipher = (Cipher)(c.newInstance()); while (s2ccipher.getBlockSize() > Es2c.Length) { buf.reset(); buf.putMPInt(K); buf.putByte(H); buf.putByte(Es2c); hash.update(buf.buffer, 0, buf.index); byte[] foo = hash.digest(); byte[] bar = new byte[Es2c.Length + foo.Length]; Array.Copy(Es2c, 0, bar, 0, Es2c.Length); Array.Copy(foo, 0, bar, Es2c.Length, foo.Length); Es2c = bar; } s2ccipher.init(Cipher.DECRYPT_MODE, Es2c, IVs2c); s2ccipher_size = s2ccipher.getIVSize(); method = guess[KeyExchange.PROPOSAL_MAC_ALGS_STOC]; c = Type.GetType(getConfig(method)); s2cmac = (MAC)(c.newInstance()); s2cmac.init(MACs2c); //mac_buf=new byte[s2cmac.getBlockSize()]; s2cmac_result1 = new byte[s2cmac.getBlockSize()]; s2cmac_result2 = new byte[s2cmac.getBlockSize()]; method = guess[KeyExchange.PROPOSAL_ENC_ALGS_CTOS]; c = Type.GetType(getConfig(method)); c2scipher = (Cipher)(c.newInstance()); while (c2scipher.getBlockSize() > Ec2s.Length) { buf.reset(); buf.putMPInt(K); buf.putByte(H); buf.putByte(Ec2s); hash.update(buf.buffer, 0, buf.index); byte[] foo = hash.digest(); byte[] bar = new byte[Ec2s.Length + foo.Length]; Array.Copy(Ec2s, 0, bar, 0, Ec2s.Length); Array.Copy(foo, 0, bar, Ec2s.Length, foo.Length); Ec2s = bar; } c2scipher.init(Cipher.ENCRYPT_MODE, Ec2s, IVc2s); c2scipher_size = c2scipher.getIVSize(); method = guess[KeyExchange.PROPOSAL_MAC_ALGS_CTOS]; c = Type.GetType(getConfig(method)); c2smac = (MAC)(c.newInstance()); c2smac.init(MACc2s); method = guess[KeyExchange.PROPOSAL_COMP_ALGS_CTOS]; initDeflater(method); method = guess[KeyExchange.PROPOSAL_COMP_ALGS_STOC]; initInflater(method); } catch (Exception e) { if (e is JSchException) throw e; throw new JSchException(e.ToString(), e); //Console.Error.WriteLine("updatekeys: "+e); } }
bool decrypt_rsa() { byte[] p_array; byte[] q_array; byte[] dmp1_array; byte[] dmq1_array; byte[] iqmp_array; try { byte[] plain; if (encrypted) { if (keytype == OPENSSH) { cipher.init(Cipher.DECRYPT_MODE, key, iv); plain = new byte[encoded_data.Length]; cipher.update(encoded_data, 0, encoded_data.Length, plain, 0); } else if (keytype == FSECURE) { for (int i = 0; i < iv.Length; i++) { iv[i] = 0; } cipher.init(Cipher.DECRYPT_MODE, key, iv); plain = new byte[encoded_data.Length]; cipher.update(encoded_data, 0, encoded_data.Length, plain, 0); } else { return(false); } } else { if (n_array != null) { return(true); } plain = encoded_data; } if (keytype == FSECURE) { // FSecure Buffer buf = new Buffer(plain); int foo = buf.getInt(); if (plain.Length != foo + 4) { return(false); } e_array = buf.getMPIntBits(); d_array = buf.getMPIntBits(); n_array = buf.getMPIntBits(); byte[] u_array = buf.getMPIntBits(); p_array = buf.getMPIntBits(); q_array = buf.getMPIntBits(); return(true); } int index = 0; int length = 0; if (plain[index] != 0x30) { return(false); } index++; // SEQUENCE length = plain[index++] & 0xff; if ((length & 0x80) != 0) { int foo = length & 0x7f; length = 0; while (foo-- > 0) { length = (length << 8) + (plain[index++] & 0xff); } } if (plain[index] != 0x02) { return(false); } index++; // INTEGER length = plain[index++] & 0xff; if ((length & 0x80) != 0) { int foo = length & 0x7f; length = 0; while (foo-- > 0) { length = (length << 8) + (plain[index++] & 0xff); } } index += length; //Console.Error.WriteLine("int: len="+length); //System.err.print(Integer.toHexString(plain[index-1]&0xff)+":"); //Console.Error.WriteLine(""); index++; length = plain[index++] & 0xff; if ((length & 0x80) != 0) { int foo = length & 0x7f; length = 0; while (foo-- > 0) { length = (length << 8) + (plain[index++] & 0xff); } } n_array = new byte[length]; Array.Copy(plain, index, n_array, 0, length); index += length; /* * Console.Error.WriteLine("int: N len="+length); * for(int i=0; i<n_array.Length; i++){ * System.err.print(Integer.toHexString(n_array[i]&0xff)+":"); * } * Console.Error.WriteLine(""); */ index++; length = plain[index++] & 0xff; if ((length & 0x80) != 0) { int foo = length & 0x7f; length = 0; while (foo-- > 0) { length = (length << 8) + (plain[index++] & 0xff); } } e_array = new byte[length]; Array.Copy(plain, index, e_array, 0, length); index += length; /* * Console.Error.WriteLine("int: E len="+length); * for(int i=0; i<e_array.Length; i++){ * System.err.print(Integer.toHexString(e_array[i]&0xff)+":"); * } * Console.Error.WriteLine(""); */ index++; length = plain[index++] & 0xff; if ((length & 0x80) != 0) { int foo = length & 0x7f; length = 0; while (foo-- > 0) { length = (length << 8) + (plain[index++] & 0xff); } } d_array = new byte[length]; Array.Copy(plain, index, d_array, 0, length); index += length; /* * Console.Error.WriteLine("int: D len="+length); * for(int i=0; i<d_array.Length; i++){ * System.err.print(Integer.toHexString(d_array[i]&0xff)+":"); * } * Console.Error.WriteLine(""); */ index++; length = plain[index++] & 0xff; if ((length & 0x80) != 0) { int foo = length & 0x7f; length = 0; while (foo-- > 0) { length = (length << 8) + (plain[index++] & 0xff); } } p_array = new byte[length]; Array.Copy(plain, index, p_array, 0, length); index += length; /* * Console.Error.WriteLine("int: P len="+length); * for(int i=0; i<p_array.Length; i++){ * System.err.print(Integer.toHexString(p_array[i]&0xff)+":"); * } * Console.Error.WriteLine(""); */ index++; length = plain[index++] & 0xff; if ((length & 0x80) != 0) { int foo = length & 0x7f; length = 0; while (foo-- > 0) { length = (length << 8) + (plain[index++] & 0xff); } } q_array = new byte[length]; Array.Copy(plain, index, q_array, 0, length); index += length; /* * Console.Error.WriteLine("int: q len="+length); * for(int i=0; i<q_array.Length; i++){ * System.err.print(Integer.toHexString(q_array[i]&0xff)+":"); * } * Console.Error.WriteLine(""); */ index++; length = plain[index++] & 0xff; if ((length & 0x80) != 0) { int foo = length & 0x7f; length = 0; while (foo-- > 0) { length = (length << 8) + (plain[index++] & 0xff); } } dmp1_array = new byte[length]; Array.Copy(plain, index, dmp1_array, 0, length); index += length; /* * Console.Error.WriteLine("int: dmp1 len="+length); * for(int i=0; i<dmp1_array.Length; i++){ * System.err.print(Integer.toHexString(dmp1_array[i]&0xff)+":"); * } * Console.Error.WriteLine(""); */ index++; length = plain[index++] & 0xff; if ((length & 0x80) != 0) { int foo = length & 0x7f; length = 0; while (foo-- > 0) { length = (length << 8) + (plain[index++] & 0xff); } } dmq1_array = new byte[length]; Array.Copy(plain, index, dmq1_array, 0, length); index += length; /* * Console.Error.WriteLine("int: dmq1 len="+length); * for(int i=0; i<dmq1_array.Length; i++){ * System.err.print(Integer.toHexString(dmq1_array[i]&0xff)+":"); * } * Console.Error.WriteLine(""); */ index++; length = plain[index++] & 0xff; if ((length & 0x80) != 0) { int foo = length & 0x7f; length = 0; while (foo-- > 0) { length = (length << 8) + (plain[index++] & 0xff); } } iqmp_array = new byte[length]; Array.Copy(plain, index, iqmp_array, 0, length); index += length; /* * Console.Error.WriteLine("int: iqmp len="+length); * for(int i=0; i<iqmp_array.Length; i++){ * System.err.print(Integer.toHexString(iqmp_array[i]&0xff)+":"); * } * Console.Error.WriteLine(""); */ } catch //(Exception e) { //Console.Error.WriteLine(e); return(false); } return(true); }