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Create GKCrypts

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This commit is contained in:
Florian Märkl 2018-11-29 14:23:08 +01:00
commit 5f654dde02
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GPG key ID: 125BC8A5A6A1E857
4 changed files with 60 additions and 1 deletions
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1
lib/include/chiaki/common.h
View file

@ -24,6 +24,7 @@ extern "C" {
#define CHIAKI_EXPORT
#define CHIAKI_NEW(t) (malloc(sizeof(t)))
typedef enum
{

22
lib/include/chiaki/gkcrypt.h
View file

@ -46,6 +46,28 @@ CHIAKI_EXPORT ChiakiErrorCode chiaki_gkcrypt_gen_key_stream(ChiakiGKCrypt *gkcry
CHIAKI_EXPORT ChiakiErrorCode chiaki_gkcrypt_decrypt(ChiakiGKCrypt *gkcrypt, size_t key_pos, uint8_t *buf, size_t buf_size);
static inline ChiakiErrorCode chiaki_gkcrypt_encrypt(ChiakiGKCrypt *gkcrypt, size_t key_pos, uint8_t *buf, size_t buf_size) { return chiaki_gkcrypt_decrypt(gkcrypt, key_pos, buf, buf_size); }
static inline ChiakiGKCrypt *chiaki_gkcrypt_new(ChiakiLog *log, size_t key_buf_blocks, uint8_t index, const uint8_t *handshake_key, const uint8_t *ecdh_secret)
{
ChiakiGKCrypt *gkcrypt = CHIAKI_NEW(ChiakiGKCrypt);
if(!gkcrypt)
return NULL;
ChiakiErrorCode err = chiaki_gkcrypt_init(gkcrypt, log, key_buf_blocks, index, handshake_key, ecdh_secret);
if(err != CHIAKI_ERR_SUCCESS)
{
free(gkcrypt);
return NULL;
}
return gkcrypt;
}
static inline void chiaki_gkcrypt_free(ChiakiGKCrypt *gkcrypt)
{
if(!gkcrypt)
return;
chiaki_gkcrypt_fini(gkcrypt);
free(gkcrypt);
}
#ifdef __cplusplus
}
#endif

5
lib/include/chiaki/nagare.h
View file

@ -22,6 +22,7 @@
#include "takion.h"
#include "log.h"
#include "ecdh.h"
#include "gkcrypt.h"
#include <stdbool.h>
@ -35,7 +36,9 @@ typedef struct chiaki_nagare_t
ChiakiLog *log;
ChiakiTakion takion;
ChiakiMirai bang_mirai;
uint8_t ecdh_secret[CHIAKI_ECDH_SECRET_SIZE];
uint8_t *ecdh_secret;
ChiakiGKCrypt *gkcrypt_a;
ChiakiGKCrypt *gkcrypt_b;
} ChiakiNagare;
CHIAKI_EXPORT ChiakiErrorCode chiaki_nagare_run(struct chiaki_session_t *session);

33
lib/src/nagare.c
View file

@ -23,6 +23,7 @@
#include <string.h>
#include <assert.h>
#include <unistd.h>
#include <takion.pb.h>
#include <pb_encode.h>
@ -50,6 +51,8 @@ CHIAKI_EXPORT ChiakiErrorCode chiaki_nagare_run(ChiakiSession *session)
nagare->session = session;
nagare->log = &session->log;
nagare->ecdh_secret = NULL;
ChiakiErrorCode err = chiaki_mirai_init(&nagare->bang_mirai);
if(err != CHIAKI_ERR_SUCCESS)
goto error_bang_mirai;
@ -106,6 +109,22 @@ CHIAKI_EXPORT ChiakiErrorCode chiaki_nagare_run(ChiakiSession *session)
CHIAKI_LOGI(&session->log, "Nagare successfully received bang\n");
nagare->gkcrypt_a = chiaki_gkcrypt_new(&session->log, 0 /* TODO */, 2, session->handshake_key, nagare->ecdh_secret);
if(!nagare->gkcrypt_a)
{
CHIAKI_LOGE(&session->log, "Nagare failed to initialize GKCrypt with index 2\n");
goto error_takion;
}
nagare->gkcrypt_b = chiaki_gkcrypt_new(&session->log, 0 /* TODO */, 3, session->handshake_key, nagare->ecdh_secret);
if(!nagare->gkcrypt_b)
{
CHIAKI_LOGE(&session->log, "Nagare failed to initialize GKCrypt with index 3\n");
goto error_gkcrypt_a;
}
while(1)
sleep(1);
CHIAKI_LOGI(&session->log, "Nagare is disconnecting\n");
@ -113,11 +132,15 @@ CHIAKI_EXPORT ChiakiErrorCode chiaki_nagare_run(ChiakiSession *session)
nagare_send_disconnect(nagare);
err = CHIAKI_ERR_SUCCESS;
chiaki_gkcrypt_free(nagare->gkcrypt_b);
error_gkcrypt_a:
chiaki_gkcrypt_free(nagare->gkcrypt_a);
error_takion:
chiaki_takion_close(&nagare->takion);
CHIAKI_LOGI(&session->log, "Nagare closed takion\n");
error_bang_mirai:
chiaki_mirai_fini(&nagare->bang_mirai);
free(nagare->ecdh_secret);
return err;
@ -200,6 +223,14 @@ static void nagare_takion_data_expect_bang(ChiakiNagare *nagare, uint8_t *buf, s
goto error;
}
assert(!nagare->ecdh_secret);
nagare->ecdh_secret = malloc(CHIAKI_ECDH_SECRET_SIZE);
if(!nagare->ecdh_secret)
{
CHIAKI_LOGE(nagare->log, "Nagare failed to alloc ECDH secret memory\n");
goto error;
}
ChiakiErrorCode err = chiaki_ecdh_derive_secret(&nagare->session->ecdh,
nagare->ecdh_secret,
ecdh_pub_key_buf.buf, ecdh_pub_key_buf.size,
@ -208,6 +239,8 @@ static void nagare_takion_data_expect_bang(ChiakiNagare *nagare, uint8_t *buf, s
if(err != CHIAKI_ERR_SUCCESS)
{
free(nagare->ecdh_secret);
nagare->ecdh_secret = NULL;
CHIAKI_LOGE(nagare->log, "Nagare failed to derive secret from bang\n");
goto error;
}