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weechat-xmpp
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weechat-xmpp/omemo.c

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// This Source Code Form is subject to the terms of the Mozilla Public
// License, version 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include <stdlib.h>
#include <stdint.h>
#include <time.h>
#include <math.h>
#include <gcrypt.h>
#include <signal_protocol.h>
#include <key_helper.h>
#include <curve.h>
#include <lmdb.h>
#include <strophe.h>
struct t_omemo_db {
MDB_env *env;
MDB_dbi dbi_omemo;
};
#include "plugin.h"
#include "account.h"
#include "omemo.h"
#define mdb_val_str(s) { \
.mv_data = s, .mv_size = strlen(s), \
}
#define mdb_val_intptr(i) { \
.mv_data = i, .mv_size = sizeof(*i), \
}
#define mdb_val_sizeof(t) { \
.mv_data = NULL, .mv_size = sizeof(t), \
}
const char *OMEMO_ADVICE = "[OMEMO encrypted message (XEP-0384)]";
void signal_protocol_address_free(signal_protocol_address* ptr) {
if (!ptr)
return;
if (ptr->name) {
free((void*)ptr->name);
}
return free(ptr);
}
void signal_protocol_address_set_name(signal_protocol_address* self, const char* name) {
if (!self)
return;
if (!name)
return;
char* n = malloc(strlen(name)+1);
memcpy(n, name, strlen(name));
n[strlen(name)] = 0;
if (self->name) {
free((void*)self->name);
}
self->name = n;
self->name_len = strlen(n);
}
char* signal_protocol_address_get_name(signal_protocol_address* self) {
if (!self)
return NULL;
if (!self->name)
return 0;
char* res = malloc(sizeof(char) * (self->name_len + 1));
memcpy(res, self->name, self->name_len);
res[self->name_len] = 0;
return res;
}
int32_t signal_protocol_address_get_device_id(signal_protocol_address* self) {
if (!self)
return -1;
return self->device_id;
}
void signal_protocol_address_set_device_id(signal_protocol_address* self, int32_t device_id) {
if (!self)
return;
self->device_id = device_id;
}
signal_protocol_address* signal_protocol_address_new(const char* name, int32_t device_id) {
if (!name)
return NULL;
signal_protocol_address* address = malloc(sizeof(signal_protocol_address));
address->device_id = -1;
address->name = NULL;
signal_protocol_address_set_name(address, name);
signal_protocol_address_set_device_id(address, device_id);
return address;
}
int aes_cipher(int cipher, size_t key_len, int* algo, int* mode) {
switch (key_len) {
case 16:
*algo = GCRY_CIPHER_AES128;
break;
case 24:
*algo = GCRY_CIPHER_AES192;
break;
case 32:
*algo = GCRY_CIPHER_AES256;
break;
default:
return SG_ERR_UNKNOWN;
}
switch (cipher) {
case SG_CIPHER_AES_CBC_PKCS5:
*mode = GCRY_CIPHER_MODE_CBC;
break;
case SG_CIPHER_AES_CTR_NOPADDING:
*mode = GCRY_CIPHER_MODE_CTR;
break;
default:
return SG_ERR_UNKNOWN;
}
return SG_SUCCESS;
}
void lock_function(void *user_data)
{
(void) user_data;
}
void unlock_function(void *user_data)
{
(void) user_data;
}
int cp_randomize(uint8_t *data, size_t len) {
gcry_randomize(data, len, GCRY_STRONG_RANDOM);
return SG_SUCCESS;
}
int cp_random_generator(uint8_t *data, size_t len, void *user_data) {
(void) user_data;
gcry_randomize(data, len, GCRY_STRONG_RANDOM);
return SG_SUCCESS;
}
int cp_hmac_sha256_init(void **hmac_context, const uint8_t *key, size_t key_len, void *user_data) {
(void) user_data;
gcry_mac_hd_t* ctx = malloc(sizeof(gcry_mac_hd_t));
if (!ctx) return SG_ERR_NOMEM;
if (gcry_mac_open(ctx, GCRY_MAC_HMAC_SHA256, 0, 0)) {
free(ctx);
return SG_ERR_UNKNOWN;
}
if (gcry_mac_setkey(*ctx, key, key_len)) {
free(ctx);
return SG_ERR_UNKNOWN;
}
*hmac_context = ctx;
return SG_SUCCESS;
}
int cp_hmac_sha256_update(void *hmac_context, const uint8_t *data, size_t data_len, void *user_data) {
(void) user_data;
gcry_mac_hd_t* ctx = hmac_context;
if (gcry_mac_write(*ctx, data, data_len)) return SG_ERR_UNKNOWN;
return SG_SUCCESS;
}
int cp_hmac_sha256_final(void *hmac_context, signal_buffer **output, void *user_data) {
(void) user_data;
size_t len = gcry_mac_get_algo_maclen(GCRY_MAC_HMAC_SHA256);
uint8_t md[len];
gcry_mac_hd_t* ctx = hmac_context;
if (gcry_mac_read(*ctx, md, &len)) return SG_ERR_UNKNOWN;
signal_buffer *output_buffer = signal_buffer_create(md, len);
if (!output_buffer) return SG_ERR_NOMEM;
*output = output_buffer;
return SG_SUCCESS;
}
void cp_hmac_sha256_cleanup(void *hmac_context, void *user_data) {
(void) user_data;
gcry_mac_hd_t* ctx = hmac_context;
if (ctx) {
gcry_mac_close(*ctx);
free(ctx);
}
}
int cp_sha512_digest_init(void **digest_context, void *user_data) {
(void) user_data;
gcry_md_hd_t* ctx = malloc(sizeof(gcry_mac_hd_t));
if (!ctx) return SG_ERR_NOMEM;
if (gcry_md_open(ctx, GCRY_MD_SHA512, 0)) {
free(ctx);
return SG_ERR_UNKNOWN;
}
*digest_context = ctx;
return SG_SUCCESS;
}
int cp_sha512_digest_update(void *digest_context, const uint8_t *data, size_t data_len, void *user_data) {
(void) user_data;
gcry_md_hd_t* ctx = digest_context;
gcry_md_write(*ctx, data, data_len);
return SG_SUCCESS;
}
int cp_sha512_digest_final(void *digest_context, signal_buffer **output, void *user_data) {
(void) user_data;
size_t len = gcry_md_get_algo_dlen(GCRY_MD_SHA512);
gcry_md_hd_t* ctx = digest_context;
uint8_t* md = gcry_md_read(*ctx, GCRY_MD_SHA512);
if (!md) return SG_ERR_UNKNOWN;
gcry_md_reset(*ctx);
signal_buffer *output_buffer = signal_buffer_create(md, len);
free(md);
if (!output_buffer) return SG_ERR_NOMEM;
*output = output_buffer;
return SG_SUCCESS;
}
void cp_sha512_digest_cleanup(void *digest_context, void *user_data) {
(void) user_data;
gcry_md_hd_t* ctx = digest_context;
if (ctx) {
gcry_md_close(*ctx);
free(ctx);
}
}
int cp_encrypt(signal_buffer **output,
int cipher,
const uint8_t *key, size_t key_len,
const uint8_t *iv, size_t iv_len,
const uint8_t *plaintext, size_t plaintext_len,
void *user_data) {
(void) user_data;
int algo, mode, error_code = SG_ERR_UNKNOWN;
if (aes_cipher(cipher, key_len, &algo, &mode)) return SG_ERR_INVAL;
gcry_cipher_hd_t ctx = {0};
if (gcry_cipher_open(&ctx, algo, mode, 0)) return SG_ERR_NOMEM;
signal_buffer* padded = 0;
signal_buffer* out_buf = 0;
goto no_error;
error:
gcry_cipher_close(ctx);
if (padded != 0) {
signal_buffer_bzero_free(padded);
}
if (out_buf != 0) {
signal_buffer_free(out_buf);
}
return error_code;
no_error:
if (gcry_cipher_setkey(ctx, key, key_len)) goto error;
uint8_t tag_len = 0, pad_len = 0;
switch (cipher) {
case SG_CIPHER_AES_CBC_PKCS5:
if (gcry_cipher_setiv(ctx, iv, iv_len)) goto error;
pad_len = 16 - (plaintext_len % 16);
if (pad_len == 0) pad_len = 16;
break;
case SG_CIPHER_AES_CTR_NOPADDING:
if (gcry_cipher_setctr(ctx, iv, iv_len)) goto error;
break;
default:
return SG_ERR_UNKNOWN;
}
size_t padded_len = plaintext_len + pad_len;
padded = signal_buffer_alloc(padded_len);
if (padded == 0) {
error_code = SG_ERR_NOMEM;
goto error;
}
memset(signal_buffer_data(padded) + plaintext_len, pad_len, pad_len);
memcpy(signal_buffer_data(padded), plaintext, plaintext_len);
out_buf = signal_buffer_alloc(padded_len + tag_len);
if (out_buf == 0) {
error_code = SG_ERR_NOMEM;
goto error;
}
if (gcry_cipher_encrypt(ctx, signal_buffer_data(out_buf), padded_len, signal_buffer_data(padded), padded_len)) goto error;
if (tag_len > 0) {
if (gcry_cipher_gettag(ctx, signal_buffer_data(out_buf) + padded_len, tag_len)) goto error;
}
*output = out_buf;
out_buf = 0;
signal_buffer_bzero_free(padded);
padded = 0;
gcry_cipher_close(ctx);
return SG_SUCCESS;
}
int cp_decrypt(signal_buffer **output,
int cipher,
const uint8_t *key, size_t key_len,
const uint8_t *iv, size_t iv_len,
const uint8_t *ciphertext, size_t ciphertext_len,
void *user_data) {
(void) user_data;
int algo, mode, error_code = SG_ERR_UNKNOWN;
*output = 0;
if (aes_cipher(cipher, key_len, &algo, &mode)) return SG_ERR_INVAL;
if (ciphertext_len == 0) return SG_ERR_INVAL;
gcry_cipher_hd_t ctx = {0};
if (gcry_cipher_open(&ctx, algo, mode, 0)) return SG_ERR_NOMEM;
signal_buffer* out_buf = 0;
goto no_error;
error:
gcry_cipher_close(ctx);
if (out_buf != 0) {
signal_buffer_bzero_free(out_buf);
}
return error_code;
no_error:
if (gcry_cipher_setkey(ctx, key, key_len)) goto error;
uint8_t tag_len = 0, pkcs_pad = 0;
switch (cipher) {
case SG_CIPHER_AES_CBC_PKCS5:
if (gcry_cipher_setiv(ctx, iv, iv_len)) goto error;
pkcs_pad = 1;
break;
case SG_CIPHER_AES_CTR_NOPADDING:
if (gcry_cipher_setctr(ctx, iv, iv_len)) goto error;
break;
default:
goto error;
}
size_t padded_len = ciphertext_len - tag_len;
out_buf = signal_buffer_alloc(padded_len);
if (out_buf == 0) {
error_code = SG_ERR_NOMEM;
goto error;
}
if (gcry_cipher_decrypt(ctx, signal_buffer_data(out_buf), signal_buffer_len(out_buf), ciphertext, padded_len)) goto error;
if (tag_len > 0) {
if (gcry_cipher_checktag(ctx, ciphertext + padded_len, tag_len)) goto error;
}
if (pkcs_pad) {
uint8_t pad_len = signal_buffer_data(out_buf)[padded_len - 1];
if (pad_len > 16 || pad_len > padded_len) goto error;
*output = signal_buffer_create(signal_buffer_data(out_buf), padded_len - pad_len);
signal_buffer_bzero_free(out_buf);
out_buf = 0;
} else {
*output = out_buf;
out_buf = 0;
}
gcry_cipher_close(ctx);
return SG_SUCCESS;
}
int iks_get_identity_key_pair(signal_buffer **public_data, signal_buffer **private_data, void *user_data)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_local_private_key = mdb_val_str("local_private_key");
MDB_val k_local_public_key = mdb_val_str("local_public_key");
MDB_val v_local_private_key, v_local_public_key;
// Get the local client's identity key pair
if (mdb_txn_begin(omemo->db->env, NULL, MDB_RDONLY, &transaction)) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb transaction",
weechat_prefix("error"));
}
if (mdb_get(transaction, omemo->db->dbi_omemo,
&k_local_private_key, &v_local_private_key) &&
mdb_get(transaction, omemo->db->dbi_omemo,
&k_local_public_key, &v_local_public_key))
{
*private_data = signal_buffer_create(v_local_private_key.mv_data, v_local_private_key.mv_size);
*public_data = signal_buffer_create(v_local_public_key.mv_data, v_local_public_key.mv_size);
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
return -1;
};
}
else
{
struct ratchet_identity_key_pair *identity;
mdb_txn_abort(transaction);
if (mdb_txn_begin(omemo->db->env, NULL, 0, &transaction)) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb transaction",
weechat_prefix("error"));
return -1;
}
signal_protocol_key_helper_generate_identity_key_pair(
&identity, omemo->context);
ec_private_key *private_key = ratchet_identity_key_pair_get_private(identity);
ec_public_key *public_key = ratchet_identity_key_pair_get_public(identity);
ec_private_key_serialize(private_data, private_key);
ec_public_key_serialize(public_data, public_key);
v_local_private_key.mv_data = signal_buffer_data(*private_data);
v_local_private_key.mv_size = signal_buffer_len(*private_data);
v_local_public_key.mv_data = signal_buffer_data(*public_data);
v_local_public_key.mv_size = signal_buffer_len(*public_data);
if (mdb_put(transaction, omemo->db->dbi_omemo,
&k_local_private_key, &v_local_private_key, MDB_NOOVERWRITE) &&
mdb_put(transaction, omemo->db->dbi_omemo,
&k_local_public_key, &v_local_public_key, MDB_NOOVERWRITE))
{
weechat_printf(NULL, "%sxmpp: failed to write lmdb value",
weechat_prefix("error"));
return -1;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
return -1;
};
}
return 0;
}
int iks_get_local_registration_id(void *user_data, uint32_t *registration_id)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_local_registration_id = mdb_val_str("local_registration_id");
MDB_val v_local_registration_id = mdb_val_sizeof(uint32_t);
// Return the local client's registration ID
if (mdb_txn_begin(omemo->db->env, NULL, MDB_RDONLY, &transaction)) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb transaction",
weechat_prefix("error"));
return -1;
}
if (mdb_get(transaction, omemo->db->dbi_omemo,
&k_local_registration_id,
&v_local_registration_id))
{
*registration_id = *(uint32_t*)v_local_registration_id.mv_data;
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
return -1;
};
}
else
{
mdb_txn_abort(transaction);
if (mdb_txn_begin(omemo->db->env, NULL, 0, &transaction)) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb transaction",
weechat_prefix("error"));
return -1;
}
signal_protocol_key_helper_generate_registration_id(
(uint32_t*)&v_local_registration_id.mv_data, 0, omemo->context);
if (mdb_put(transaction, omemo->db->dbi_omemo,
&k_local_registration_id,
&v_local_registration_id, MDB_NOOVERWRITE))
{
weechat_printf(NULL, "%sxmpp: failed to write lmdb value",
weechat_prefix("error"));
return -1;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
return -1;
};
}
return 0;
}
int iks_save_identity(const signal_protocol_address *address, uint8_t *key_data, size_t key_len, void *user_data)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_registration_id = {
.mv_data = NULL,
.mv_size = strlen("registration_id_") + address->name_len,
};
MDB_val v_registration_id = mdb_val_intptr((uint32_t*)&address->device_id);
MDB_val k_identity_key = {
.mv_data = NULL,
.mv_size = strlen("identity_key_") + address->name_len,
};
MDB_val v_identity_key = {.mv_data = key_data, .mv_size = key_len};
k_registration_id.mv_data = malloc(sizeof(char) * (
k_registration_id.mv_size + 1));
snprintf(k_registration_id.mv_data, k_registration_id.mv_size,
"registration_id_%s", address->name);
k_identity_key.mv_data = malloc(sizeof(char) * (
k_identity_key.mv_size + 1));
snprintf(k_identity_key.mv_data, k_identity_key.mv_size,
"identity_key_%s", address->name);
// Save a remote client's identity key
if (mdb_txn_begin(omemo->db->env, NULL, 0, &transaction)) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb transaction",
weechat_prefix("error"));
return -1;
}
if (mdb_put(transaction, omemo->db->dbi_omemo, &k_registration_id,
&v_registration_id, 0) ||
mdb_put(transaction, omemo->db->dbi_omemo, &k_identity_key,
&v_identity_key, 0)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb value",
weechat_prefix("error"));
return -1;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
return -1;
};
return 0;
}
int iks_is_trusted_identity(const signal_protocol_address *address, uint8_t *key_data, size_t key_len, void *user_data)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_registration_id = {
.mv_data = NULL,
.mv_size = strlen("registration_id_") + address->name_len,
};
MDB_val v_registration_id = mdb_val_intptr((uint32_t*)&address->device_id);
MDB_val k_identity_key = {
.mv_data = NULL,
.mv_size = strlen("identity_key_") + address->name_len,
};
MDB_val v_identity_key = {.mv_data = key_data, .mv_size = key_len};
int trusted = 1;
k_registration_id.mv_data = malloc(sizeof(char) * (
k_registration_id.mv_size + 1));
snprintf(k_registration_id.mv_data, k_registration_id.mv_size,
"registration_id_%s", address->name);
k_identity_key.mv_data = malloc(sizeof(char) * (
k_identity_key.mv_size + 1));
snprintf(k_identity_key.mv_data, k_identity_key.mv_size,
"identity_key_%s", address->name);
// Verify a remote client's identity key
if (mdb_txn_begin(omemo->db->env, NULL, MDB_RDONLY, &transaction)) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb transaction",
weechat_prefix("error"));
return -1;
}
if (mdb_get(transaction, omemo->db->dbi_omemo, &k_registration_id,
&v_registration_id) ||
mdb_get(transaction, omemo->db->dbi_omemo, &k_identity_key,
&v_identity_key)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb value",
weechat_prefix("error"));
return -1;
};
if (*(uint32_t*)v_registration_id.mv_data != (uint32_t)address->device_id)
trusted = 0;
if (v_identity_key.mv_size != key_len ||
memcmp(v_identity_key.mv_data, key_data, key_len) != 0)
trusted = 0;
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
return -1;
};
return trusted;
}
void iks_destroy_func(void *user_data)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
(void) omemo;
// Function called to perform cleanup when the data store context is being destroyed
}
int pks_load_pre_key(signal_buffer **record, uint32_t pre_key_id, void *user_data)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_pre_key = mdb_val_str("pre_key");
MDB_val v_pre_key;
if (mdb_txn_begin(omemo->db->env, NULL, MDB_RDONLY, &transaction)) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb transaction",
weechat_prefix("error"));
}
if (mdb_get(transaction, omemo->db->dbi_omemo,
&k_pre_key, &v_pre_key))
{
*record = signal_buffer_create(v_pre_key.mv_data, v_pre_key.mv_size);
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to close lmdb transaction",
weechat_prefix("error"));
return -1;
};
}
else
{
signal_protocol_key_helper_pre_key_list_node *pre_keys_list;
session_pre_key *pre_key = NULL;
mdb_txn_abort(transaction);
/*
signal_protocol_key_helper_generate_pre_keys(
&pre_keys_list, 0, 100, omemo->context);
pre_key = signal_protocol_key_helper_key_list_element(pre_keys_list);
signal_protocol_key_helper_key_list_next(pre_keys_list);
uint32_t id = session_pre_key_get_id(pre_key);
session_pre_key_serialize(&record, pre_key);
signal_protocol_key_helper_key_list_free(pre_keys_list);
if (mdb_txn_begin(omemo->db->env, NULL, 0, &transaction)) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb transaction",
weechat_prefix("error"));
return -1;
}
v_pre_key.mv_data = signal_buffer_data(*record);
v_pre_key.mv_size = signal_buffer_len(*record);
if (mdb_put(transaction, omemo->db->dbi_omemo,
&k_pre_key, &v_pre_key, MDB_NOOVERWRITE))
{
weechat_printf(NULL, "%sxmpp: failed to write lmdb value",
weechat_prefix("error"));
return -1;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
return -1;
};
*/
return -1;
}
return 0;
}
int pks_store_pre_key(uint32_t pre_key_id, uint8_t *record, size_t record_len, void *user_data)
{
(void) pre_key_id;
(void) record;
(void) record_len;
(void) user_data;
return -1;
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_pre_key = mdb_val_str("pre_key");
MDB_val v_pre_key;
if (mdb_txn_begin(omemo->db->env, NULL, MDB_RDONLY, &transaction)) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb transaction",
weechat_prefix("error"));
}
if (mdb_get(transaction, omemo->db->dbi_omemo,
&k_pre_key, &v_pre_key))
{
*record = signal_buffer_create(v_pre_key.mv_data, v_pre_key.mv_size);
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to close lmdb transaction",
weechat_prefix("error"));
return -1;
};
}
else
{
signal_protocol_key_helper_pre_key_list_node *pre_keys_list;
session_pre_key *pre_key = NULL;
mdb_txn_abort(transaction);
/*
signal_protocol_key_helper_generate_pre_keys(
&pre_keys_list, 0, 100, omemo->context);
pre_key = signal_protocol_key_helper_key_list_element(pre_keys_list);
signal_protocol_key_helper_key_list_next(pre_keys_list);
uint32_t id = session_pre_key_get_id(pre_key);
session_pre_key_serialize(&record, pre_key);
signal_protocol_key_helper_key_list_free(pre_keys_list);
if (mdb_txn_begin(omemo->db->env, NULL, 0, &transaction)) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb transaction",
weechat_prefix("error"));
return -1;
}
v_pre_key.mv_data = signal_buffer_data(*record);
v_pre_key.mv_size = signal_buffer_len(*record);
if (mdb_put(transaction, omemo->db->dbi_omemo,
&k_pre_key, &v_pre_key, MDB_NOOVERWRITE))
{
weechat_printf(NULL, "%sxmpp: failed to write lmdb value",
weechat_prefix("error"));
return -1;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
return -1;
};
*/
return -1;
}
return 0;
}
int pks_contains_pre_key(uint32_t pre_key_id, void *user_data)
{
(void) pre_key_id;
(void) user_data;
return -1;
}
int pks_remove_pre_key(uint32_t pre_key_id, void *user_data)
{
(void) pre_key_id;
(void) user_data;
return -1;
}
void pks_destroy_func(void *user_data)
{
(void) user_data;
}
int spks_load_signed_pre_key(signal_buffer **record, uint32_t signed_pre_key_id, void *user_data)
{
(void) record;
(void) signed_pre_key_id;
(void) user_data;
return -1;
//session_signed_pre_key *signed_pre_key;
//int start_id = 0;
//time_t timestamp = time(NULL);
//signal_protocol_key_helper_generate_signed_pre_key(&signed_pre_key, new_omemo->identity, 5, timestamp, new_omemo->context);
}
int spks_store_signed_pre_key(uint32_t signed_pre_key_id, uint8_t *record, size_t record_len, void *user_data)
{
(void) signed_pre_key_id;
(void) record;
(void) record_len;
(void) user_data;
return -1;
}
int spks_contains_signed_pre_key(uint32_t signed_pre_key_id, void *user_data)
{
(void) signed_pre_key_id;
(void) user_data;
return -1;
}
int spks_remove_signed_pre_key(uint32_t signed_pre_key_id, void *user_data)
{
(void) signed_pre_key_id;
(void) user_data;
return -1;
}
void spks_destroy_func(void *user_data)
{
(void) user_data;
}
int ss_load_session_func(signal_buffer **record, signal_buffer **user_record, const signal_protocol_address *address, void *user_data)
{
(void) record;
(void) user_record;
(void) address;
(void) user_data;
return -1;
}
int ss_get_sub_device_sessions_func(signal_int_list **sessions, const char *name, size_t name_len, void *user_data)
{
(void) sessions;
(void) name;
(void) name_len;
(void) user_data;
return -1;
}
int ss_store_session_func(const signal_protocol_address *address, uint8_t *record, size_t record_len, uint8_t *user_record, size_t user_record_len, void *user_data)
{
(void) address;
(void) record;
(void) record_len;
(void) user_record;
(void) user_record_len;
(void) user_data;
return -1;
}
int ss_contains_session_func(const signal_protocol_address *address, void *user_data)
{
(void) address;
(void) user_data;
return -1;
}
int ss_delete_session_func(const signal_protocol_address *address, void *user_data)
{
(void) address;
(void) user_data;
return -1;
}
int ss_delete_all_sessions_func(const char *name, size_t name_len, void *user_data)
{
(void) name;
(void) name_len;
(void) user_data;
return -1;
}
void ss_destroy_func(void *user_data)
{
(void) user_data;
}
int sks_store_sender_key(const signal_protocol_sender_key_name *sender_key_name, uint8_t *record, size_t record_len, uint8_t *user_record, size_t user_record_len, void *user_data)
{
(void) sender_key_name;
(void) record;
(void) record_len;
(void) user_record;
(void) user_record_len;
(void) user_data;
return -1;
}
int sks_load_sender_key(signal_buffer **record, signal_buffer **user_record, const signal_protocol_sender_key_name *sender_key_name, void *user_data)
{
(void) record;
(void) user_record;
(void) sender_key_name;
(void) user_data;
return -1;
}
void sks_destroy_func(void *user_data)
{
(void) user_data;
}
void omemo__log_emit_weechat(int level, const char *message, size_t len, void *user_data)
{
struct t_gui_buffer *buffer = (struct t_gui_buffer*)user_data;
static const char *log_level_name[5] = {"error", "warn", "notice", "info", "debug"};
const char *tags = level < SG_LOG_DEBUG ? "no_log" : NULL;
weechat_printf_date_tags(
buffer, 0, tags,
_("%somemo (%s): %.*s"),
weechat_prefix("network"),
log_level_name[level], len, message);
}
void omemo__init(struct t_gui_buffer *buffer, struct t_omemo **omemo,
const char *account_name)
{
struct t_omemo *new_omemo;
gcry_check_version(NULL);
new_omemo = calloc(1, sizeof(**omemo));
new_omemo->db = malloc(sizeof(struct t_omemo_db));
signal_context_create(&new_omemo->context, buffer);
signal_context_set_log_function(new_omemo->context, &omemo__log_emit_weechat);
mdb_env_create(&new_omemo->db->env);
mdb_env_set_maxdbs(new_omemo->db->env, 50);
mdb_env_set_mapsize(new_omemo->db->env, (size_t)1048576 * 100000); // 1MB * 100000
char *path = weechat_string_eval_expression("${weechat_data_dir}/xmpp.omemo.db",
NULL, NULL, NULL);
if (mdb_env_open(new_omemo->db->env, path, MDB_NOSUBDIR, 0664) != 0)
{
return;
}
free(path);
MDB_txn *parentTransaction = NULL;
MDB_txn *transaction;
if (mdb_txn_begin(new_omemo->db->env, parentTransaction, 0 ? MDB_RDONLY : 0, &transaction)) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb transaction",
weechat_prefix("error"));
}
size_t db_name_len = strlen("omemo_") + strlen(account_name);
char *db_name = malloc(sizeof(char) * (db_name_len + 1));
snprintf(db_name, db_name_len+1, "identity_key_%s", account_name);
if (mdb_dbi_open(transaction, db_name, MDB_DUPSORT | MDB_CREATE, &new_omemo->db->dbi_omemo)) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb database",
weechat_prefix("error"));
}
mdb_txn_abort(transaction);
struct signal_crypto_provider crypto_provider = {
.random_func = &cp_random_generator,
.hmac_sha256_init_func = &cp_hmac_sha256_init,
.hmac_sha256_update_func = &cp_hmac_sha256_update,
.hmac_sha256_final_func = &cp_hmac_sha256_final,
.hmac_sha256_cleanup_func = &cp_hmac_sha256_cleanup,
.sha512_digest_init_func = &cp_sha512_digest_init,
.sha512_digest_update_func = &cp_sha512_digest_update,
.sha512_digest_final_func = &cp_sha512_digest_final,
.sha512_digest_cleanup_func = &cp_sha512_digest_cleanup,
.encrypt_func = &cp_encrypt,
.decrypt_func = &cp_decrypt,
.user_data = new_omemo,
};
signal_context_set_crypto_provider(new_omemo->context, &crypto_provider);
signal_context_set_locking_functions(new_omemo->context, &lock_function, &unlock_function);
signal_protocol_store_context_create(&new_omemo->store_context, new_omemo->context);
struct signal_protocol_identity_key_store identity_key_store = {
.get_identity_key_pair = &iks_get_identity_key_pair,
.get_local_registration_id = &iks_get_local_registration_id,
.save_identity = &iks_save_identity,
.is_trusted_identity = &iks_is_trusted_identity,
.destroy_func = &iks_destroy_func,
.user_data = new_omemo,
};
signal_protocol_store_context_set_identity_key_store(
new_omemo->store_context, &identity_key_store);
struct signal_protocol_pre_key_store pre_key_store = {
.load_pre_key = &pks_load_pre_key,
.store_pre_key = &pks_store_pre_key,
.contains_pre_key = &pks_contains_pre_key,
.remove_pre_key = &pks_remove_pre_key,
.destroy_func = &pks_destroy_func,
.user_data = new_omemo,
};
signal_protocol_store_context_set_pre_key_store(
new_omemo->store_context, &pre_key_store);
struct signal_protocol_signed_pre_key_store signed_pre_key_store = {
.load_signed_pre_key = &spks_load_signed_pre_key,
.store_signed_pre_key = &spks_store_signed_pre_key,
.contains_signed_pre_key = &spks_contains_signed_pre_key,
.remove_signed_pre_key = &spks_remove_signed_pre_key,
.destroy_func = &spks_destroy_func,
.user_data = new_omemo,
};
signal_protocol_store_context_set_signed_pre_key_store(
new_omemo->store_context, &signed_pre_key_store);
struct signal_protocol_session_store session_store = {
.load_session_func = &ss_load_session_func,
.get_sub_device_sessions_func = &ss_get_sub_device_sessions_func,
.store_session_func = &ss_store_session_func,
.contains_session_func = &ss_contains_session_func,
.delete_session_func = &ss_delete_session_func,
.delete_all_sessions_func = &ss_delete_all_sessions_func,
.destroy_func = &ss_destroy_func,
.user_data = new_omemo,
};
signal_protocol_store_context_set_session_store(
new_omemo->store_context, &session_store);
struct signal_protocol_sender_key_store sender_key_store = {
.store_sender_key = &sks_store_sender_key,
.load_sender_key = &sks_load_sender_key,
.destroy_func = &sks_destroy_func,
.user_data = new_omemo,
};
signal_protocol_store_context_set_sender_key_store(
new_omemo->store_context, &sender_key_store);
*omemo = new_omemo;
}
void omemo__serialize(struct t_omemo *omemo, char **device,
char **identity, size_t *identity_len)
{
if (device)
{
size_t id_slen = log10(omemo->device_id) * 2;
char *id = malloc(sizeof(char) * id_slen);
snprintf(id, id_slen, "%d", omemo->device_id);
*device = id;
}
if (identity)
{
signal_buffer *buffer;
ratchet_identity_key_pair_serialize(&buffer, omemo->identity);
size_t key_slen = signal_buffer_len(buffer) * 2;
char *key = malloc(sizeof(char) * key_slen);
size_t length = weechat_string_base_encode(64, (char*)signal_buffer_data(buffer),
signal_buffer_len(buffer), key);
*identity = key;
if (identity_len)
*identity_len = length;
}
}
void omemo__deserialize(struct t_omemo *omemo, const char *device,
const char *identity, size_t identity_len)
{
if (device)
{
uint32_t id = device[0] ? atoi(device) : 0;
omemo->device_id = id;
}
if (identity)
{
uint8_t *key = malloc(sizeof(uint8_t) * identity_len);
size_t length = weechat_string_base_decode(64, identity, (char*)key);
ratchet_identity_key_pair_deserialize(&omemo->identity,
key, length, omemo->context);
}
}
void omemo__free(struct t_omemo *omemo)
{
if (omemo)
{
if (omemo->context)
signal_context_destroy(omemo->context);
if (omemo->identity)
ratchet_identity_key_pair_destroy(
(signal_type_base *)omemo->identity);
free(omemo);
}
}
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