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Diffstat (limited to 'libotr/libotr-4.1.1/src/context_priv.h')
| -rw-r--r-- | libotr/libotr-4.1.1/src/context_priv.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/libotr/libotr-4.1.1/src/context_priv.h b/libotr/libotr-4.1.1/src/context_priv.h new file mode 100644 index 0000000..0748074 --- /dev/null +++ b/libotr/libotr-4.1.1/src/context_priv.h @@ -0,0 +1,94 @@ +/* + * Off-the-Record Messaging library + * Copyright (C) 2004-2012 Ian Goldberg, Chris Alexander, Willy Lew, + * Lisa Du, Nikita Borisov + * <otr@cypherpunks.ca> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of version 2.1 of the GNU Lesser General + * Public License as published by the Free Software Foundation. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef __CONTEXT_PRIV_H__ +#define __CONTEXT_PRIV_H__ + +#include <gcrypt.h> + +#include "dh.h" +#include "auth.h" +#include "sm.h" + +typedef struct context_priv { + /* The part of the fragmented message we've seen so far */ + char *fragment; + + /* The length of fragment */ + size_t fragment_len; + + /* The total number of fragments in this message */ + unsigned short fragment_n; + + /* The highest fragment number we've seen so far for this message */ + unsigned short fragment_k; + + /* current keyid used by other side; this is set to 0 if we get + * a OTRL_TLV_DISCONNECTED message from them. */ + unsigned int their_keyid; + + /* Y[their_keyid] (their DH pubkey) */ + gcry_mpi_t their_y; + + /* Y[their_keyid-1] (their prev DH pubkey) */ + gcry_mpi_t their_old_y; + + /* current keyid used by us */ + unsigned int our_keyid; + + /* DH key[our_keyid] */ + DH_keypair our_dh_key; + + /* DH key[our_keyid-1] */ + DH_keypair our_old_dh_key; + + /* sesskeys[i][j] are the session keys derived from DH + * key[our_keyid-i] and mpi Y[their_keyid-j] */ + DH_sesskeys sesskeys[2][2]; + + /* saved mac keys to be revealed later */ + unsigned int numsavedkeys; + unsigned char *saved_mac_keys; + + /* generation number: increment every time we go private, and never + * reset to 0 (unless we remove the context entirely) */ + unsigned int generation; + + /* The last time a Data Message was sent */ + time_t lastsent; + + /* The last time a Data Message was received */ + time_t lastrecv; + + /* The plaintext of the last Data Message sent */ + char *lastmessage; + + /* Is the last message eligible for retransmission? */ + int may_retransmit; + +} ConnContextPriv; + +/* Create a new private connection context. */ +ConnContextPriv *otrl_context_priv_new(); + +/* Frees up memory that was used in otrl_context_priv_new */ +void otrl_context_priv_force_finished(ConnContextPriv *context_priv); + +#endif |