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#include <sys/time.h>
#include <glib.h>
#include <pthread.h>
#include <signal/key_helper.h>
#include <signal/signal_protocol.h>
#include <sodium.h>
#include "config/account.h"
#include "log.h"
#include "omemo/crypto.h"
#include "omemo/omemo.h"
#include "ui/ui.h"
#include "xmpp/xmpp.h"
#include "xmpp/connection.h"
#include "xmpp/omemo.h"
static gboolean loaded;
static void lock(void *user_data);
static void unlock(void *user_data);
struct omemo_context_t {
pthread_mutexattr_t attr;
pthread_mutex_t lock;
signal_context *signal;
uint32_t device_id;
GHashTable *device_list;
ratchet_identity_key_pair *identity_key_pair;
uint32_t registration_id;
signal_protocol_key_helper_pre_key_list_node *pre_keys_head;
session_signed_pre_key *signed_pre_key;
};
static omemo_context omemo_ctx;
void
omemo_init(void)
{
log_info("Initialising OMEMO");
signal_crypto_provider crypto_provider = {
.random_func = omemo_random_func,
.hmac_sha256_init_func = omemo_hmac_sha256_init_func,
.hmac_sha256_update_func = omemo_hmac_sha256_update_func,
.hmac_sha256_final_func = omemo_hmac_sha256_final_func,
.hmac_sha256_cleanup_func = omemo_hmac_sha256_cleanup_func,
.sha512_digest_init_func = omemo_sha512_digest_init_func,
.sha512_digest_update_func = omemo_sha512_digest_update_func,
.sha512_digest_final_func = omemo_sha512_digest_final_func,
.sha512_digest_cleanup_func = omemo_sha512_digest_cleanup_func,
.encrypt_func = omemo_encrypt_func,
.decrypt_func = omemo_decrypt_func,
.user_data = NULL
};
if (omemo_crypto_init() != 0) {
cons_show("Error initializing OMEMO crypto");
}
pthread_mutexattr_init(&omemo_ctx.attr);
pthread_mutexattr_settype(&omemo_ctx.attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&omemo_ctx.lock, &omemo_ctx.attr);
if (signal_context_create(&omemo_ctx.signal, &omemo_ctx) != 0) {
cons_show("Error initializing OMEMO context");
return;
}
if (signal_context_set_crypto_provider(omemo_ctx.signal, &crypto_provider) != 0) {
cons_show("Error initializing OMEMO crypto");
return;
}
signal_context_set_locking_functions(omemo_ctx.signal, lock, unlock);
loaded = FALSE;
omemo_ctx.device_list = g_hash_table_new_full(g_str_hash, g_str_equal, free, (GDestroyNotify)g_list_free);
}
void
omemo_generate_crypto_materials(ProfAccount *account)
{
xmpp_ctx_t * const ctx = connection_get_ctx();
char *barejid = xmpp_jid_bare(ctx, session_get_account_name());
GList *device_list = g_hash_table_lookup(omemo_ctx.device_list, barejid);
g_hash_table_steal(omemo_ctx.device_list, barejid);
omemo_ctx.device_id = randombytes_uniform(0x80000000);
device_list = g_list_append(device_list, GINT_TO_POINTER(omemo_ctx.device_id));
g_hash_table_insert(omemo_ctx.device_list, strdup(barejid), device_list);
signal_protocol_key_helper_generate_identity_key_pair(&omemo_ctx.identity_key_pair, omemo_ctx.signal);
signal_protocol_key_helper_generate_registration_id(&omemo_ctx.registration_id, 0, omemo_ctx.signal);
signal_protocol_key_helper_generate_pre_keys(&omemo_ctx.pre_keys_head, randombytes_random(), 100, omemo_ctx.signal);
struct timeval tv;
gettimeofday(&tv, NULL);
unsigned long long timestamp = (unsigned long long)(tv.tv_sec) * 1000 + (unsigned long long)(tv.tv_usec) / 1000;
signal_protocol_key_helper_generate_signed_pre_key(&omemo_ctx.signed_pre_key, omemo_ctx.identity_key_pair, 5, timestamp, omemo_ctx.signal);
loaded = TRUE;
omemo_devicelist_publish(device_list);
omemo_bundle_publish();
}
void
omemo_start_session(ProfAccount *account, char *barejid)
{
}
gboolean
omemo_loaded(void)
{
return loaded;
}
uint32_t
omemo_device_id(void)
{
return omemo_ctx.device_id;
}
void
omemo_identity_key(unsigned char **output, size_t *length)
{
signal_buffer *buffer = NULL;
ec_public_key_serialize(&buffer, ratchet_identity_key_pair_get_public(omemo_ctx.identity_key_pair));
*length = signal_buffer_len(buffer);
*output = malloc(*length);
memcpy(*output, signal_buffer_const_data(buffer), *length);
signal_buffer_free(buffer);
}
void
omemo_signed_prekey(unsigned char **output, size_t *length)
{
signal_buffer *buffer = NULL;
ec_public_key_serialize(&buffer, ec_key_pair_get_public(session_signed_pre_key_get_key_pair(omemo_ctx.signed_pre_key)));
*length = signal_buffer_len(buffer);
*output = malloc(*length);
memcpy(*output, signal_buffer_const_data(buffer), *length);
signal_buffer_free(buffer);
}
void
omemo_signed_prekey_signature(unsigned char **output, size_t *length)
{
*length = session_signed_pre_key_get_signature_len(omemo_ctx.signed_pre_key);
*output = malloc(*length);
memcpy(*output, session_signed_pre_key_get_signature(omemo_ctx.signed_pre_key), *length);
}
void
omemo_prekeys(GList ** const prekeys, GList ** const ids, GList ** const lengths)
{
signal_protocol_key_helper_pre_key_list_node *p;
for (p = omemo_ctx.pre_keys_head; p != NULL; p = signal_protocol_key_helper_key_list_next(p)) {
session_pre_key *prekey = signal_protocol_key_helper_key_list_element(p);
signal_buffer *buffer = NULL;
ec_public_key_serialize(&buffer, ec_key_pair_get_public(session_pre_key_get_key_pair(prekey)));
size_t length = signal_buffer_len(buffer);
unsigned char *prekey_value = malloc(length);
memcpy(prekey_value, signal_buffer_const_data(buffer), length);
signal_buffer_free(buffer);
*prekeys = g_list_append(*prekeys, prekey_value);
*ids = g_list_append(*ids, GINT_TO_POINTER(session_pre_key_get_id(prekey)));
*lengths = g_list_append(*lengths, GINT_TO_POINTER(length));
}
}
void
omemo_set_device_list(const char *const jid, GList * device_list)
{
xmpp_ctx_t * const ctx = connection_get_ctx();
char *barejid = xmpp_jid_bare(ctx, session_get_account_name());
if (g_strcmp0(jid, barejid) == 0) {
if (!g_list_find(device_list, GINT_TO_POINTER(omemo_ctx.device_id))) {
device_list = g_list_append(device_list, GINT_TO_POINTER(omemo_ctx.device_id));
omemo_devicelist_publish(device_list);
}
}
g_hash_table_insert(omemo_ctx.device_list, strdup(jid), device_list);
}
static void
lock(void *user_data)
{
omemo_context *ctx = (omemo_context *)user_data;
pthread_mutex_lock(&ctx->lock);
}
static void
unlock(void *user_data)
{
omemo_context *ctx = (omemo_context *)user_data;
pthread_mutex_unlock(&ctx->lock);
}
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