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Diffstat (limited to 'src/protocol/internal/fqterm_ssh2_kex.h')
-rw-r--r-- | src/protocol/internal/fqterm_ssh2_kex.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/src/protocol/internal/fqterm_ssh2_kex.h b/src/protocol/internal/fqterm_ssh2_kex.h new file mode 100644 index 0000000..671e094 --- /dev/null +++ b/src/protocol/internal/fqterm_ssh2_kex.h @@ -0,0 +1,105 @@ +/*************************************************************************** + * fqterm, a terminal emulator for both BBS and *nix. * + * Copyright (C) 2008 fqterm development group. * + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + * This program is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with this program; if not, write to the * + * Free Software Foundation, Inc., * + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * + ***************************************************************************/ + +#ifndef FQTERM_SSH2_KEX_H +#define FQTERM_SSH2_KEX_H + +#include <openssl/sha.h> + +#include "fqterm_ssh_kex.h" + +namespace FQTerm { + +class FQTermSSHPacketReceiver; +class FQTermSSHPacketSender; + +class FQTermSSH2Kex: public FQTermSSHKex { + Q_OBJECT; +private: + enum FQTermSSH2KexState { + BEFORE_KEXINIT, WAIT_REPLY, SESSIONKEY_SENT, KEYEX_OK + } kex_state_; + + /* + string V_C, the client's identification string (CR and LF + excluded) + string V_S, the server's identification string (CR and LF + excluded) + string I_C, the payload of the client's SSH_MSG_KEXINIT + string I_S, the payload of the server's SSH_MSG_KEXINIT + string K_S, the host key + mpint e, exchange value sent by the client + mpint f, exchange value sent by the server + mpint K, the shared secret + */ + + int I_C_len_; + char *I_C_; + int I_S_len_; + char *I_S_; + + BIGNUM *bn_x_; + BIGNUM *bn_e_; + BIGNUM *bn_g_; + BIGNUM *bn_p_; + BN_CTX *ctx_; + + BIGNUM *bn_K_; + BIGNUM *bn_f_; + + unsigned char H_[SHA_DIGEST_LENGTH]; + + unsigned char *session_id_; + + + + + bool is_first_kex_; + + FQTermSSHRSA *host_key_; + FQTermSSHRSA *server_key_; + + u_char cookie_[16]; + int server_flag_, ciphers_, auth_; +// u_char session_id_[16]; + u_char session_key_[32]; + + void negotiateAlgorithms(); + void exchangeKey(); + bool verifyKey(); + void sendNewKeys(); + bool changeKeyAlg(); + + unsigned char *computeKey(int len, char flag); + +public: + FQTermSSH2Kex(const char *V_C, const char *V_S); + ~FQTermSSH2Kex(); + + virtual void initKex(FQTermSSHPacketReceiver *packetReceiver, + FQTermSSHPacketSender *outputSender); + +public slots: + void handlePacket(int type); +}; + +} // namespace FQTerm + +#endif //FQTERM_SSH2_KEX_H |