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packet: Prepare counters to handle rekeying limits

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Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Daiki Ueno <dueno@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This commit is contained in:
Jakub Jelen
2018-11-07 14:49:43 +01:00
committed by Andreas Schneider
parent 92e978f2f3
commit a61368a06a
4 changed files with 59 additions and 1 deletions
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5
include/libssh/crypto.h
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@@ -164,6 +164,11 @@ struct ssh_cipher_struct {
struct chacha20_poly1305_keysched *chacha20_schedule;
unsigned int keysize; /* bytes of key used. != keylen */
size_t tag_size; /* overhead required for tag */
/* Counters for rekeying initialization */
uint32_t packets;
uint64_t blocks;
/* Rekeying limit for the cipher or manually enforced */
uint64_t max_blocks;
/* sets the new key for immediate use */
int (*set_encrypt_key)(struct ssh_cipher_struct *cipher, void *key, void *IV);
int (*set_decrypt_key)(struct ssh_cipher_struct *cipher, void *key, void *IV);

2
include/libssh/session.h
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@@ -30,6 +30,7 @@
#include "libssh/channels.h"
#include "libssh/poll.h"
#include "libssh/config.h"
#include "libssh/misc.h"
/* These are the different states a SSH session can be into its life */
enum ssh_session_state_e {
@@ -113,6 +114,7 @@ struct ssh_session_struct {
int openssh;
uint32_t send_seq;
uint32_t recv_seq;
struct ssh_timestamp last_rekey_time;
int connected;
/* !=0 when the user got a session handle */