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hidnplayr |
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; sshlib_connection.inc - SSH connection |
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; |
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hidnplayr |
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; Copyright (C) 2016-2024 Jeffrey Amelynck |
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hidnplayr |
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; |
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; This program is free software: you can redistribute it and/or modify |
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; it under the terms of the GNU General Public License as published by |
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; the Free Software Foundation, either version 3 of the License, or |
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; (at your option) any later version. |
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; |
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; This program is distributed in the hope that it will be useful, |
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; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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; GNU General Public License for more details. |
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; |
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; You should have received a copy of the GNU General Public License |
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; along with this program. If not, see . |
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hidnplayr |
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; https://www.ietf.org/rfc/rfc4253.txt |
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hidnplayr |
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proc sshlib_connect con_ptr, hostname_sz |
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locals |
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socketnum dd ? |
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sockaddr sockaddr_in |
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ctx_ptr dd ? |
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endl |
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mov edi, [con_ptr] |
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lea eax, [edi + sshlib_connection.part_ex_hash_ctx] |
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mov [ctx_ptr], eax |
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; Set default values in sockaddr struct |
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mov [sockaddr.sin_family], AF_INET4 |
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mov [sockaddr.sin_port], 22 shl 8 |
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; Parse hostname_sz |
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; Verify length, extract port number if given and copy base url to sshlib_connection struct |
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; Port number, if provided, will be written in sockaddr struct. |
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; Hostname ends with any character equal to 0x20 or lower |
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mov esi, [hostname_sz] |
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lea edi, [edi + sshlib_connection.hostname_sz] |
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mov ecx, MAX_HOSTNAME_LENGTH |
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@@: |
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dec ecx |
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jz .err_hostname |
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lodsb |
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cmp al, ':' |
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je .do_port |
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stosb |
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cmp al, 0x20 |
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ja @r |
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mov byte[edi-1], 0 |
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jmp .hostname_ok |
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.do_port: |
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xor eax, eax |
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xor ebx, ebx |
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mov byte[edi-1], 0 |
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.portloop: |
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lodsb |
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cmp al, 0x20 |
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jbe .port_done |
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sub al, '0' |
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jb .err_hostname |
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cmp al, 9 |
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ja .err_hostname |
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lea ebx, [ebx*4+ebx] |
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shl ebx, 1 |
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add ebx, eax |
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jmp .portloop |
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.port_done: |
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xchg bl, bh |
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mov [sockaddr.sin_port], bx |
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.hostname_ok: |
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; resolve name |
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push esp ; reserve stack place |
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push esp |
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mov eax, [con_ptr] |
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lea eax, [eax+sshlib_connection.hostname_sz] |
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invoke getaddrinfo, eax, 0, 0 |
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pop esi |
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; test for error |
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test eax, eax |
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jnz .err_hostname |
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; convert IP address to decimal notation |
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mov eax, [esi+addrinfo.ai_addr] |
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mov eax, [eax+sockaddr_in.sin_addr] |
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mov [sockaddr.sin_addr], eax |
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invoke inet_ntoa, eax |
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; write result |
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stdcall sshlib_callback_connecting, [con_ptr], eax |
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; free allocated memory |
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invoke freeaddrinfo, esi |
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; Create socket |
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mcall socket, AF_INET4, SOCK_STREAM, 0 |
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cmp eax, -1 |
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jz .err_sock |
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mov [socketnum], eax |
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mov ebx, [con_ptr] |
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mov [ebx + sshlib_connection.socketnum], eax |
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; Connect |
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DEBUGF 2, "Connecting to server\n" |
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lea edx, [sockaddr] |
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mcall connect, [socketnum], , sizeof.sockaddr_in |
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test eax, eax |
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jnz .err_sock |
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; Start calculating hash |
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hidnplayr |
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invoke sha2_256.init, [ctx_ptr] |
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; HASH: string V_C, the client's version string (CR and NL excluded) |
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hidnplayr |
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invoke sha2_256.update, [ctx_ptr], ssh_ident_ha, ssh_msg_ident.length+4-2 |
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hidnplayr |
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; >> Send our identification string |
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DEBUGF 2, "Sending ID string\n" |
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mcall send, [socketnum], ssh_msg_ident, ssh_msg_ident.length, 0 |
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cmp eax, -1 |
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je .err_sock |
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; << Check protocol version of server |
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mov edx, [con_ptr] |
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lea edx, [edx + sshlib_connection.rx_buffer + 4] |
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mcall recv, [socketnum], , PACKETSIZE, 0 |
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cmp eax, -1 |
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je .err_sock |
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DEBUGF 2, "Received ID string\n" |
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cmp dword[edx], "SSH-" |
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jne .err_proto |
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cmp dword[edx+4], "2.0-" |
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jne .err_proto |
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; HASH: string V_S, the server's version string (CR and NL excluded) |
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lea ecx, [eax+2] |
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sub eax, 2 |
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bswap eax |
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sub edx, 4 |
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mov dword[edx], eax |
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hidnplayr |
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invoke sha2_256.update, [ctx_ptr], edx, ecx |
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hidnplayr |
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; >> Key Exchange init |
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mov eax, [con_ptr] |
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mov [eax + sshlib_connection.status], SSHLIB_CON_STAT_INIT |
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mov [eax + sshlib_connection.algo_kex], SSHLIB_ALGO_NONE |
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mov [eax + sshlib_connection.algo_hostkey], SSHLIB_ALGO_NONE |
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mov [eax + sshlib_connection.algo_crypt_rx], SSHLIB_ALGO_NONE |
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mov [eax + sshlib_connection.algo_crypt_tx], SSHLIB_ALGO_NONE |
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mov [eax + sshlib_connection.algo_mac_rx], SSHLIB_ALGO_NONE |
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mov [eax + sshlib_connection.algo_mac_tx], SSHLIB_ALGO_NONE |
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mov [eax + sshlib_connection.algo_compr_rx], SSHLIB_ALGO_NONE |
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mov [eax + sshlib_connection.algo_compr_tx], SSHLIB_ALGO_NONE |
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mov [eax + sshlib_connection.rx_mac_seqnr], 0 |
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mov [eax + sshlib_connection.tx_mac_seqnr], 0 |
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mov [eax + sshlib_connection.rx_crypt_blocksize], 4 ; minimum blocksize |
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mov [eax + sshlib_connection.tx_crypt_blocksize], 4 |
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hidnplayr |
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mov [eax + sshlib_connection.rx_crypt_proc], 0 |
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mov [eax + sshlib_connection.tx_crypt_proc], 0 |
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hidnplayr |
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mov [eax + sshlib_connection.rx_mac_proc], 0 |
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mov [eax + sshlib_connection.tx_mac_proc], 0 |
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mov [eax + sshlib_connection.rx_mac_length], 0 |
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mov [eax + sshlib_connection.tx_mac_length], 0 |
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mov [eax + sshlib_connection.tx_pad_size], 8 |
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hidnplayr |
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mov [eax + sshlib_connection.rx_proc], sshlib_recv_packet_clear |
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mov [eax + sshlib_connection.tx_proc], sshlib_send_packet_clear |
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hidnplayr |
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DEBUGF 2, "Sending KEX init\n" |
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mov edi, ssh_msg_kex.cookie |
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call MBRandom |
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stosd |
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call MBRandom |
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stosd |
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call MBRandom |
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stosd |
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call MBRandom |
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stosd |
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stdcall sshlib_send_packet, [con_ptr], ssh_msg_kex, ssh_msg_kex.length, 0 |
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cmp eax, -1 |
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je .err_sock |
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; HASH: string I_C, the payload of the client's SSH_MSG_KEXINIT |
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mov esi, [con_ptr] |
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mov eax, [esi+sshlib_connection.tx_buffer.packet_length] |
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bswap eax |
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movzx ebx, [esi+sshlib_connection.tx_buffer.padding_length] |
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sub eax, ebx |
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dec eax |
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lea edx, [eax+4] |
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bswap eax |
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lea esi, [esi+sshlib_connection.tx_buffer+1] |
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mov dword[esi], eax |
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hidnplayr |
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invoke sha2_256.update, [ctx_ptr], esi, edx |
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hidnplayr |
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; << Check key exchange init of server |
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stdcall sshlib_recv_packet, [con_ptr], 0 |
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cmp eax, -1 |
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je .err_sock |
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mov esi, [con_ptr] |
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cmp [esi + sshlib_connection.rx_buffer.message_code], SSH_MSG_KEXINIT |
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jne .err_proto |
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DEBUGF 2, "Received KEX init\n" |
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lea esi, [esi + sshlib_connection.rx_buffer + sizeof.ssh_packet_header + 16] |
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lodsd |
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bswap eax |
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DEBUGF 1, "kex_algorithms: %s\n", esi |
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add esi, eax |
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lodsd |
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bswap eax |
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DEBUGF 1, "server_host_key_algorithms: %s\n", esi |
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add esi, eax |
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lodsd |
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bswap eax |
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DEBUGF 1, "encryption_algorithms_client_to_server: %s\n", esi |
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add esi, eax |
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lodsd |
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bswap eax |
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DEBUGF 1, "encryption_algorithms_server_to_client: %s\n", esi |
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add esi, eax |
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lodsd |
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bswap eax |
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DEBUGF 1, "mac_algorithms_client_to_server: %s\n", esi |
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add esi, eax |
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lodsd |
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bswap eax |
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DEBUGF 1, "mac_algorithms_server_to_client: %s\n", esi |
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add esi, eax |
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lodsd |
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bswap eax |
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DEBUGF 1, "compression_algorithms_client_to_server: %s\n", esi |
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add esi, eax |
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lodsd |
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bswap eax |
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DEBUGF 1, "compression_algorithms_server_to_client: %s\n", esi |
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add esi, eax |
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lodsd |
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bswap eax |
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DEBUGF 1, "languages_client_to_server: %s\n", esi |
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add esi, eax |
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lodsd |
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bswap eax |
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DEBUGF 1, "languages_server_to_client: %s\n", esi |
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add esi, eax |
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lodsb |
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DEBUGF 1, "KEX First Packet Follows: %u\n", al |
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; TODO: parse this structure and set algorithm codes accordingly |
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; FIXME: hardcoded for now |
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mov esi, [con_ptr] |
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mov [esi+sshlib_connection.algo_kex], SSHLIB_KEX_DH_SHA256 |
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mov [esi+sshlib_connection.algo_hostkey], SSHLIB_HOSTKEY_RSA |
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mov [esi+sshlib_connection.algo_crypt_rx], SSHLIB_CRYPT_AES256_CTR |
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hidnplayr |
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mov [esi+sshlib_connection.algo_crypt_tx], SSHLIB_CRYPT_AES256_CTR ; SSHLIB_CRYPT_CHACHA20_POLY1305 |
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mov [esi+sshlib_connection.algo_mac_rx], SSHLIB_HMAC_SHA2_256_ETM |
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mov [esi+sshlib_connection.algo_mac_tx], SSHLIB_HMAC_SHA2_256_ETM |
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mov [esi+sshlib_connection.algo_compr_rx], SSHLIB_ALGO_NONE |
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mov [esi+sshlib_connection.algo_compr_tx], SSHLIB_ALGO_NONE |
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hidnplayr |
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; HASH: string I_S, the payload of the servers's SSH_MSG_KEXINIT |
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mov esi, [con_ptr] |
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mov eax, [esi+sshlib_connection.rx_buffer.packet_length] |
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movzx ebx, [esi+sshlib_connection.rx_buffer.padding_length] |
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sub eax, ebx |
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dec eax |
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lea edx, [eax+4] |
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bswap eax |
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lea esi, [esi+sshlib_connection.rx_buffer+1] |
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mov dword[esi], eax |
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hidnplayr |
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invoke sha2_256.update, [ctx_ptr], esi, edx |
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hidnplayr |
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; Exchange keys with the server |
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stdcall sshlib_dh_gex, [con_ptr] |
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test eax, eax |
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jnz .err |
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hidnplayr |
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; Set keys and initialize transport subroutines |
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DEBUGF 2, "SSH: Setting encryption keys\n" |
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mov ebx, [con_ptr] |
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hidnplayr |
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cmp [ebx + sshlib_connection.algo_crypt_rx], SSHLIB_CRYPT_AES256_CTR |
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je .rx_crypt_aes256_ctr |
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cmp [ebx + sshlib_connection.algo_crypt_rx], SSHLIB_CRYPT_AES256_CBC |
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je .rx_crypt_aes256_cbc |
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cmp [ebx + sshlib_connection.algo_crypt_rx], SSHLIB_CRYPT_CHACHA20_POLY1305 |
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je .rx_crypt_poly1305_chacha20 |
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hidnplayr |
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hidnplayr |
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jmp .err_proto |
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.rx_crypt_aes256_ctr: |
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lea ecx, [ebx + sshlib_connection.rx_crypt_ctx] |
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lea edx, [ebx + sshlib_connection.rx_enc_key] |
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lea esi, [ebx + sshlib_connection.rx_iv] |
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invoke aes256ctr.init, ecx, edx, esi, 0 |
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push [aes256ctr.update] |
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pop [ebx + sshlib_connection.rx_crypt_proc] |
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mov [ebx + sshlib_connection.rx_crypt_blocksize], 16 ; AES_BLOCKSIZE |
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jmp .have_rx_crypt |
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.rx_crypt_aes256_cbc: |
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lea ecx, [ebx + sshlib_connection.rx_crypt_ctx] |
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lea edx, [ebx + sshlib_connection.rx_enc_key] |
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lea esi, [ebx + sshlib_connection.rx_iv] |
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invoke aes256cbc.init, ecx, edx, esi, 0 |
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push [aes256cbc.update] |
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pop [ebx + sshlib_connection.rx_crypt_proc] |
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mov [ebx + sshlib_connection.rx_crypt_blocksize], 16 ; AES_BLOCKSIZE |
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jmp .have_rx_crypt |
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.rx_crypt_poly1305_chacha20: |
| 9987 |
hidnplayr |
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mov [ebx + sshlib_connection.rx_proc], sshlib_recv_packet_poly1305chacha20 |
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hidnplayr |
321 |
jmp .have_rx_crypt_and_mac |
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.have_rx_crypt: |
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cmp [ebx + sshlib_connection.algo_mac_rx], SSHLIB_HMAC_SHA2_256 |
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je .rx_hmac_sha2_256 |
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cmp [ebx + sshlib_connection.algo_mac_rx], SSHLIB_HMAC_SHA2_512 |
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je .rx_hmac_sha2_512 |
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cmp [ebx + sshlib_connection.algo_mac_rx], SSHLIB_HMAC_SHA2_256_ETM |
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je .rx_hmac_sha2_256_etm |
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cmp [ebx + sshlib_connection.algo_mac_rx], SSHLIB_HMAC_SHA2_512_ETM |
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je .rx_hmac_sha2_512_etm |
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jmp .err_proto |
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.rx_hmac_sha2_256: |
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push [hmac_sha2_256.oneshot] |
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pop [ebx + sshlib_connection.rx_mac_proc] |
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mov [ebx + sshlib_connection.rx_mac_length], SHA2_256_LEN |
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mov [ebx + sshlib_connection.rx_proc], sshlib_recv_packet_hmac |
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jmp .have_rx_crypt_and_mac |
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344 |
.rx_hmac_sha2_512: |
|
|
345 |
push [hmac_sha2_512.oneshot] |
|
|
346 |
pop [ebx + sshlib_connection.rx_mac_proc] |
|
|
347 |
mov [ebx + sshlib_connection.rx_mac_length], SHA2_512_LEN |
|
|
348 |
mov [ebx + sshlib_connection.rx_proc], sshlib_recv_packet_hmac |
|
|
349 |
jmp .have_rx_crypt_and_mac |
|
|
350 |
|
|
|
351 |
.rx_hmac_sha2_256_etm: |
|
|
352 |
push [hmac_sha2_256.oneshot] |
|
|
353 |
pop [ebx + sshlib_connection.rx_mac_proc] |
|
|
354 |
mov [ebx + sshlib_connection.rx_mac_length], SHA2_256_LEN |
|
|
355 |
mov [ebx + sshlib_connection.rx_proc], sshlib_recv_packet_hmac_etm |
|
|
356 |
jmp .have_rx_crypt_and_mac |
|
|
357 |
|
|
|
358 |
.rx_hmac_sha2_512_etm: |
|
|
359 |
push [hmac_sha2_512.oneshot] |
|
|
360 |
pop [ebx + sshlib_connection.rx_mac_proc] |
|
|
361 |
mov [ebx + sshlib_connection.rx_mac_length], SHA2_512_LEN |
|
|
362 |
mov [ebx + sshlib_connection.rx_proc], sshlib_recv_packet_hmac_etm |
|
|
363 |
jmp .have_rx_crypt_and_mac |
|
|
364 |
|
|
|
365 |
|
|
|
366 |
.have_rx_crypt_and_mac: |
|
|
367 |
|
|
|
368 |
cmp [ebx + sshlib_connection.algo_crypt_tx], SSHLIB_CRYPT_AES256_CTR |
|
|
369 |
je .tx_crypt_aes256_ctr |
|
|
370 |
cmp [ebx + sshlib_connection.algo_crypt_tx], SSHLIB_CRYPT_AES256_CBC |
|
|
371 |
je .tx_crypt_aes256_cbc |
|
|
372 |
cmp [ebx + sshlib_connection.algo_crypt_tx], SSHLIB_CRYPT_CHACHA20_POLY1305 |
|
|
373 |
je .tx_crypt_poly1305_chacha20 |
|
|
374 |
|
|
|
375 |
jmp .err_proto |
|
|
376 |
|
|
|
377 |
.tx_crypt_aes256_ctr: |
|
|
378 |
lea ecx, [ebx + sshlib_connection.tx_crypt_ctx] |
|
|
379 |
lea edx, [ebx + sshlib_connection.tx_enc_key] |
|
|
380 |
lea esi, [ebx + sshlib_connection.tx_iv] |
|
|
381 |
invoke aes256ctr.init, ecx, edx, esi, 0 |
|
|
382 |
push [aes256ctr.update] |
|
|
383 |
pop [ebx + sshlib_connection.tx_crypt_proc] |
|
|
384 |
mov [ebx + sshlib_connection.tx_crypt_blocksize], 16 ; AES_BLOCKSIZE |
|
|
385 |
mov [ebx + sshlib_connection.tx_pad_size], 16 ; AES_BLOCKSIZE |
|
|
386 |
jmp .have_tx_crypt |
|
|
387 |
|
|
|
388 |
.tx_crypt_aes256_cbc: |
|
|
389 |
lea ecx, [ebx + sshlib_connection.tx_crypt_ctx] |
|
|
390 |
lea edx, [ebx + sshlib_connection.tx_enc_key] |
|
|
391 |
lea esi, [ebx + sshlib_connection.tx_iv] |
|
|
392 |
invoke aes256cbc.init, ecx, edx, esi, 0 |
|
|
393 |
push [aes256cbc.update] |
|
|
394 |
pop [ebx + sshlib_connection.tx_crypt_proc] |
|
|
395 |
mov [ebx + sshlib_connection.tx_crypt_blocksize], 16 ; AES_BLOCKSIZE |
|
|
396 |
mov [ebx + sshlib_connection.tx_pad_size], 16 ; AES_BLOCKSIZE |
|
|
397 |
jmp .have_tx_crypt |
|
|
398 |
|
|
|
399 |
.tx_crypt_poly1305_chacha20: |
| 9987 |
hidnplayr |
400 |
mov [ebx + sshlib_connection.tx_proc], sshlib_send_packet_poly1305chacha20 |
| 9990 |
hidnplayr |
401 |
jmp .have_tx_crypt_and_mac |
| 9987 |
hidnplayr |
402 |
|
| 9990 |
hidnplayr |
403 |
|
|
|
404 |
|
|
|
405 |
.have_tx_crypt: |
|
|
406 |
cmp [ebx + sshlib_connection.algo_mac_tx], SSHLIB_HMAC_SHA2_256 |
|
|
407 |
je .tx_hmac_sha2_256 |
|
|
408 |
cmp [ebx + sshlib_connection.algo_mac_tx], SSHLIB_HMAC_SHA2_512 |
|
|
409 |
je .tx_hmac_sha2_512 |
|
|
410 |
cmp [ebx + sshlib_connection.algo_mac_tx], SSHLIB_HMAC_SHA2_256_ETM |
|
|
411 |
je .tx_hmac_sha2_256_etm |
|
|
412 |
cmp [ebx + sshlib_connection.algo_mac_tx], SSHLIB_HMAC_SHA2_512_ETM |
|
|
413 |
je .tx_hmac_sha2_512_etm |
|
|
414 |
|
|
|
415 |
jmp .err_proto |
|
|
416 |
|
|
|
417 |
.tx_hmac_sha2_256: |
|
|
418 |
push [hmac_sha2_256.oneshot] |
|
|
419 |
pop [ebx + sshlib_connection.tx_mac_proc] |
|
|
420 |
mov [ebx + sshlib_connection.tx_mac_length], SHA2_256_LEN |
|
|
421 |
mov [ebx + sshlib_connection.tx_proc], sshlib_send_packet_hmac |
|
|
422 |
jmp .have_tx_crypt_and_mac |
|
|
423 |
|
|
|
424 |
.tx_hmac_sha2_512: |
|
|
425 |
push [hmac_sha2_512.oneshot] |
|
|
426 |
pop [ebx + sshlib_connection.tx_mac_proc] |
|
|
427 |
mov [ebx + sshlib_connection.tx_mac_length], SHA2_512_LEN |
|
|
428 |
mov [ebx + sshlib_connection.tx_proc], sshlib_send_packet_hmac |
|
|
429 |
jmp .have_tx_crypt_and_mac |
|
|
430 |
|
|
|
431 |
.tx_hmac_sha2_256_etm: |
|
|
432 |
push [hmac_sha2_256.oneshot] |
|
|
433 |
pop [ebx + sshlib_connection.tx_mac_proc] |
|
|
434 |
mov [ebx + sshlib_connection.tx_mac_length], SHA2_256_LEN |
|
|
435 |
mov [ebx + sshlib_connection.tx_proc], sshlib_send_packet_hmac_etm |
|
|
436 |
jmp .have_tx_crypt_and_mac |
|
|
437 |
|
|
|
438 |
.tx_hmac_sha2_512_etm: |
|
|
439 |
push [hmac_sha2_512.oneshot] |
|
|
440 |
pop [ebx + sshlib_connection.tx_mac_proc] |
|
|
441 |
mov [ebx + sshlib_connection.tx_mac_length], SHA2_512_LEN |
|
|
442 |
mov [ebx + sshlib_connection.tx_proc], sshlib_send_packet_hmac_etm |
|
|
443 |
jmp .have_tx_crypt_and_mac |
|
|
444 |
|
|
|
445 |
|
|
|
446 |
.have_tx_crypt_and_mac: |
|
|
447 |
|
|
|
448 |
|
| 9106 |
hidnplayr |
449 |
; Re-seed RNG for padding bytes |
|
|
450 |
|
|
|
451 |
call create_seed |
|
|
452 |
call init_random |
|
|
453 |
|
|
|
454 |
xor eax, eax |
|
|
455 |
ret |
|
|
456 |
|
|
|
457 |
.err_hostname: |
|
|
458 |
mov eax, SSHLIB_ERR_HOSTNAME |
|
|
459 |
ret |
|
|
460 |
|
|
|
461 |
.err_sock: |
|
|
462 |
mov eax, SSHLIB_ERR_SOCKET |
|
|
463 |
ret |
|
|
464 |
|
|
|
465 |
.err_proto: |
|
|
466 |
mov eax, SSHLIB_ERR_PROTOCOL |
|
|
467 |
ret |
|
|
468 |
|
|
|
469 |
.err: |
|
|
470 |
ret |
|
|
471 |
|
|
|
472 |
endp |
|
|
473 |
|
|
|
474 |
|
|
|
475 |
|
|
|
476 |
|
|
|
477 |
; Handle common messages and return to caller for specific ones |
|
|
478 |
proc sshlib_msg_handler, con_ptr, flags |
|
|
479 |
|
|
|
480 |
.recv: |
|
|
481 |
; Send a window update if advertised window drops below half |
|
|
482 |
cmp [ssh_chan.rcv_wnd], BUFFERSIZE/2 |
|
|
483 |
ja .no_wnd |
|
|
484 |
mov eax, BUFFERSIZE |
|
|
485 |
bswap eax |
|
|
486 |
mov [ssh_msg_channel_window_adjust.wnd], eax |
|
|
487 |
stdcall sshlib_send_packet, [con_ptr], ssh_msg_channel_window_adjust, ssh_msg_channel_window_adjust.length, 0 |
|
|
488 |
mov [ssh_chan.rcv_wnd], BUFFERSIZE |
|
|
489 |
.no_wnd: |
|
|
490 |
|
|
|
491 |
; Receive 1 SSH packet |
|
|
492 |
stdcall sshlib_recv_packet, [con_ptr], [flags] |
|
|
493 |
cmp eax, 0 |
|
|
494 |
jle .ret |
|
|
495 |
|
|
|
496 |
mov esi, [con_ptr] |
|
|
497 |
lea esi, [esi + sshlib_connection.rx_buffer] |
|
|
498 |
mov al, [esi + ssh_packet_header.message_code] |
| 9987 |
hidnplayr |
499 |
add esi, sizeof.ssh_packet_header |
| 9106 |
hidnplayr |
500 |
|
|
|
501 |
cmp al, SSH_MSG_DISCONNECT |
|
|
502 |
je .disc |
|
|
503 |
cmp al, SSH_MSG_IGNORE |
|
|
504 |
je .ign |
|
|
505 |
cmp al, SSH_MSG_DEBUG |
|
|
506 |
je .dbg |
|
|
507 |
cmp al, SSH_MSG_GLOBAL_REQUEST |
|
|
508 |
je .glob_req |
|
|
509 |
cmp al, SSH_MSG_CHANNEL_WINDOW_ADJUST |
|
|
510 |
je .chan_win_adj |
|
|
511 |
; cmp al, SSH_MSG_CHANNEL_REQUEST |
|
|
512 |
; je .chan_req |
|
|
513 |
cmp al, SSH_MSG_CHANNEL_EOF |
|
|
514 |
je .chan_eof |
|
|
515 |
cmp al, SSH_MSG_CHANNEL_CLOSE |
|
|
516 |
je .chan_close |
|
|
517 |
|
| 9987 |
hidnplayr |
518 |
DEBUGF 3, "SSH: Message type: %u\n", al |
|
|
519 |
|
| 9106 |
hidnplayr |
520 |
.ret: |
|
|
521 |
ret |
|
|
522 |
|
|
|
523 |
.disc: |
|
|
524 |
DEBUGF 3, "SSH: Disconnect message received\n" |
|
|
525 |
mov eax, SSHLIB_ERR_DISCONNECTING |
|
|
526 |
ret |
|
|
527 |
|
|
|
528 |
.ign: |
|
|
529 |
DEBUGF 3, "SSH: Ignore MSG received\n" |
|
|
530 |
jmp .recv |
|
|
531 |
|
|
|
532 |
.dbg: |
|
|
533 |
DEBUGF 3, "SSH: Debug MSG received\n" |
|
|
534 |
;TODO |
|
|
535 |
jmp .recv |
|
|
536 |
|
|
|
537 |
.glob_req: |
| 9987 |
hidnplayr |
538 |
add esi, 4 |
|
|
539 |
DEBUGF 3, "SSH: Global MSG received: %s\n", esi |
| 9106 |
hidnplayr |
540 |
;TODO |
|
|
541 |
jmp .recv |
|
|
542 |
|
|
|
543 |
.chan_win_adj: |
|
|
544 |
mov eax, dword[esi] |
|
|
545 |
bswap eax |
|
|
546 |
mov [ssh_chan.snd_wnd], eax |
|
|
547 |
; TODO: validate channel number, act accordingly |
|
|
548 |
DEBUGF 3, "SSH: Channel %u window update received\n", eax |
|
|
549 |
jmp .recv |
|
|
550 |
|
|
|
551 |
.chan_eof: |
|
|
552 |
mov eax, dword[esi] |
|
|
553 |
bswap eax |
|
|
554 |
; TODO: validate channel number, act accordingly |
|
|
555 |
DEBUGF 3, "SSH: Channel %u EOF received\n", eax |
|
|
556 |
jmp .recv |
|
|
557 |
|
|
|
558 |
.chan_close: |
|
|
559 |
mov eax, dword[esi] |
|
|
560 |
bswap eax |
|
|
561 |
; TODO: validate channel number |
|
|
562 |
DEBUGF 3, "SSH: Channel %u close received\n", eax |
|
|
563 |
; Reply with close message |
|
|
564 |
stdcall sshlib_send_packet, [con_ptr], ssh_msg_channel_close, ssh_msg_channel_close.length, 0 |
|
|
565 |
xor eax, eax |
|
|
566 |
ret |
|
|
567 |
|
| 9216 |
dunkaist |
568 |
endp |