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weechat-xmpp/omemo.cpp

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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 <fmt/core.h>
#include <memory>
#include <stdexcept>
#include <stdlib.h>
#include <stdint.h>
#include <sys/param.h>
#include <time.h>
#include <math.h>
#include <limits.h>
#include <gcrypt.h>
#include <strophe.h>
#include <weechat/weechat-plugin.h>
#include "plugin.hh"
#include "xmpp/stanza.hh"
#include "account.hh"
#include "omemo.hh"
#include "util.hh"
using namespace weechat::xmpp;
using t_omemo = omemo;
#define mdb_val_str(s) { \
.mv_size = strlen(s), .mv_data = (char*)s \
}
#define mdb_val_intptr(i) { \
.mv_size = sizeof(*i), .mv_data = i \
}
#define mdb_val_sizeof(t) { \
.mv_size = sizeof(t), .mv_data = NULL \
}
#define PRE_KEY_START 1
#define PRE_KEY_COUNT 100
#define AES_KEY_SIZE (16)
#define AES_IV_SIZE (12)
const char *OMEMO_ADVICE = "[OMEMO encrypted message (XEP-0384)]";
size_t base64_decode(const char *buffer, size_t length, uint8_t **result)
{
*result = (uint8_t*)calloc(length + 1, sizeof(uint8_t));
return weechat_string_base_decode(64, buffer, (char*)*result);
}
size_t base64_encode(const uint8_t *buffer, size_t length, char **result)
{
*result = (char*)calloc(length * 2, sizeof(char));
return weechat_string_base_encode(64, (char*)buffer, length, *result);
}
int aes_decrypt(const uint8_t *ciphertext, size_t ciphertext_len,
uint8_t *key, uint8_t *iv, uint8_t *tag, size_t tag_len,
uint8_t **plaintext, size_t *plaintext_len)
{
gcry_cipher_hd_t cipher = NULL;
if (gcry_cipher_open(&cipher, GCRY_CIPHER_AES128,
GCRY_CIPHER_MODE_GCM, GCRY_CIPHER_SECURE)) goto cleanup;
if (gcry_cipher_setkey(cipher, key, AES_KEY_SIZE)) goto cleanup;
if (gcry_cipher_setiv(cipher, iv, AES_IV_SIZE)) goto cleanup;
*plaintext_len = ciphertext_len;
*plaintext = (uint8_t*)malloc((sizeof(uint8_t) * *plaintext_len) + 1);
if (gcry_cipher_decrypt(cipher, *plaintext, *plaintext_len,
ciphertext, ciphertext_len)) goto cleanup;
if (gcry_cipher_checktag(cipher, tag, tag_len)) goto cleanup;
gcry_cipher_close(cipher);
return 1;
cleanup:
gcry_cipher_close(cipher);
return 0;
}
int aes_encrypt(const uint8_t *plaintext, size_t plaintext_len,
uint8_t **key, uint8_t **iv, uint8_t **tag, size_t *tag_len,
uint8_t **ciphertext, size_t *ciphertext_len)
{
*tag_len = 16;
*tag = (uint8_t*)calloc(*tag_len, sizeof(uint8_t));
*iv = (uint8_t*)gcry_random_bytes(AES_IV_SIZE, GCRY_STRONG_RANDOM);
*key = (uint8_t*)gcry_random_bytes(AES_KEY_SIZE, GCRY_STRONG_RANDOM);
gcry_cipher_hd_t cipher = NULL;
if (gcry_cipher_open(&cipher, GCRY_CIPHER_AES128,
GCRY_CIPHER_MODE_GCM, GCRY_CIPHER_SECURE)) goto cleanup;
if (gcry_cipher_setkey(cipher, *key, AES_KEY_SIZE)) goto cleanup;
if (gcry_cipher_setiv(cipher, *iv, AES_IV_SIZE)) goto cleanup;
*ciphertext_len = plaintext_len;
*ciphertext = (uint8_t*)malloc((sizeof(uint8_t) * *ciphertext_len) + 1);
if (gcry_cipher_encrypt(cipher, *ciphertext, *ciphertext_len,
plaintext, plaintext_len)) goto cleanup;
if (gcry_cipher_gettag(cipher, *tag, *tag_len)) goto cleanup;
gcry_cipher_close(cipher);
return 1;
cleanup:
gcry_cipher_close(cipher);
return 0;
}
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 = (char*)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 = (char*)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 = (signal_protocol_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 *) {
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 *) {
gcry_mac_hd_t* ctx = (gcry_mac_hd_t*)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 *) {
gcry_mac_hd_t* ctx = (gcry_mac_hd_t*)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, struct signal_buffer **output, void *) {
size_t len = gcry_mac_get_algo_maclen(GCRY_MAC_HMAC_SHA256);
auto md = std::unique_ptr<uint8_t[]>(new uint8_t[len]);
gcry_mac_hd_t* ctx = (gcry_mac_hd_t*)hmac_context;
if (gcry_mac_read(*ctx, md.get(), &len)) return SG_ERR_UNKNOWN;
struct signal_buffer *output_buffer = signal_buffer_create(md.get(), len);
if (!output_buffer) return SG_ERR_NOMEM;
*output = output_buffer;
return SG_SUCCESS;
}
void cp_hmac_sha256_cleanup(void *hmac_context, void *) {
gcry_mac_hd_t* ctx = (gcry_mac_hd_t*)hmac_context;
if (ctx) {
gcry_mac_close(*ctx);
free(ctx);
}
}
int cp_sha512_digest_init(void **digest_context, void *) {
gcry_md_hd_t* ctx = (gcry_md_hd_t*)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 *) {
gcry_md_hd_t* ctx = (gcry_md_hd_t*)digest_context;
gcry_md_write(*ctx, data, data_len);
return SG_SUCCESS;
}
int cp_sha512_digest_final(void *digest_context, struct signal_buffer **output, void *) {
size_t len = gcry_md_get_algo_dlen(GCRY_MD_SHA512);
gcry_md_hd_t* ctx = (gcry_md_hd_t*)digest_context;
uint8_t* md = gcry_md_read(*ctx, GCRY_MD_SHA512);
if (!md) return SG_ERR_UNKNOWN;
gcry_md_reset(*ctx);
struct 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 *) {
gcry_md_hd_t* ctx = (gcry_md_hd_t*)digest_context;
if (ctx) {
gcry_md_close(*ctx);
free(ctx);
}
}
int cp_encrypt(struct 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 *) {
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(struct 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 *) {
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(struct signal_buffer **public_data, signal_buffer **private_data, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
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;
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->dbi.omemo,
&k_local_private_key, &v_local_private_key) &&
!mdb_get(transaction, omemo->dbi.omemo,
&k_local_public_key, &v_local_public_key))
{
*private_data = signal_buffer_create((const uint8_t*)v_local_private_key.mv_data, v_local_private_key.mv_size);
*public_data = signal_buffer_create((const uint8_t*)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"));
goto cleanup;
};
}
else
{
auto identity = libsignal::identity_key_pair::generate(omemo->context);
auto private_key = identity.get_private();
auto public_key = identity.get_public();
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);
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;
}
if (mdb_put(transaction, omemo->dbi.omemo,
&k_local_private_key, &v_local_private_key, MDB_NOOVERWRITE) ||
mdb_put(transaction, omemo->dbi.omemo,
&k_local_public_key, &v_local_public_key, MDB_NOOVERWRITE))
{
weechat_printf(NULL, "%sxmpp: failed to write lmdb value",
weechat_prefix("error"));
goto cleanup;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
*private_data = signal_buffer_create((const uint8_t*)v_local_private_key.mv_data,
v_local_private_key.mv_size);
*public_data = signal_buffer_create((const uint8_t*)v_local_public_key.mv_data,
v_local_public_key.mv_size);
omemo->identity = identity;
}
return 0;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
int iks_get_local_registration_id(void *user_data, uint32_t *registration_id)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
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->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 read lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
}
else
{
uint32_t generated_id;
signal_protocol_key_helper_generate_registration_id(
&generated_id, 0, omemo->context);
v_local_registration_id.mv_data = &generated_id;
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;
}
if (mdb_put(transaction, omemo->dbi.omemo,
&k_local_registration_id,
&v_local_registration_id, MDB_NOOVERWRITE))
{
weechat_printf(NULL, "%sxmpp: failed to write lmdb value",
weechat_prefix("error"));
goto cleanup;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
*registration_id = generated_id;
}
return 0;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
int iks_save_identity(const struct signal_protocol_address *address, uint8_t *key_data, size_t key_len, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_identity_key = {
.mv_size = strlen("identity_key_") + address->name_len
+ 1 + 10,
.mv_data = NULL,
};
MDB_val v_identity_key = {.mv_size = key_len, .mv_data = key_data};
k_identity_key.mv_data = malloc(sizeof(char) * (
k_identity_key.mv_size + 1));
k_identity_key.mv_size =
snprintf((char*)k_identity_key.mv_data, k_identity_key.mv_size + 1,
"identity_key_%s_%u", address->name, address->device_id);
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->dbi.omemo, &k_identity_key,
&v_identity_key, 0)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb value",
weechat_prefix("error"));
goto cleanup;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
return 0;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
int iks_is_trusted_identity(const struct signal_protocol_address *address, uint8_t *key_data, size_t key_len, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_identity_key = {
.mv_size = strlen("identity_key_") + address->name_len
+ 1 + 10,
.mv_data = NULL,
};
MDB_val v_identity_key = {.mv_size = key_len, .mv_data = key_data};
int trusted = 1;
k_identity_key.mv_data = malloc(sizeof(char) * (
k_identity_key.mv_size + 1));
k_identity_key.mv_size =
snprintf((char*)k_identity_key.mv_data, k_identity_key.mv_size + 1,
"identity_key_%s_%u", address->name, address->device_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->dbi.omemo, &k_identity_key,
&v_identity_key)) {
weechat_printf(NULL, "%sxmpp: failed to read lmdb value",
weechat_prefix("error"));
goto cleanup;
};
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"));
goto cleanup;
};
return 1 | trusted;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
void iks_destroy_func(void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
(void) omemo;
// Function called to perform cleanup when the data store context is being destroyed
}
int pks_store_pre_key(uint32_t pre_key_id, uint8_t *record, size_t record_len, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_pre_key = {
.mv_size = strlen("pre_key_") + 10, // strlen(UINT32_MAX)
.mv_data = NULL,
};
MDB_val v_pre_key = {.mv_size = record_len, .mv_data = record};
k_pre_key.mv_data = malloc(sizeof(char) * (
k_pre_key.mv_size + 1));
k_pre_key.mv_size =
snprintf((char*)k_pre_key.mv_data, k_pre_key.mv_size + 1,
"pre_key_%-10u", pre_key_id);
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->dbi.omemo, &k_pre_key,
&v_pre_key, 0)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb value",
weechat_prefix("error"));
goto cleanup;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
return 0;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
int pks_contains_pre_key(uint32_t pre_key_id, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_pre_key = {
.mv_size = strlen("pre_key_") + 10, // strlen(UINT32_MAX)
.mv_data = NULL,
};
MDB_val v_pre_key;
k_pre_key.mv_data = malloc(sizeof(char) * (
k_pre_key.mv_size + 1));
k_pre_key.mv_size =
snprintf((char*)k_pre_key.mv_data, k_pre_key.mv_size + 1,
"pre_key_%-10u", pre_key_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->dbi.omemo, &k_pre_key,
&v_pre_key)) {
weechat_printf(NULL, "%sxmpp: failed to read lmdb value",
weechat_prefix("error"));
mdb_txn_abort(transaction);
goto cleanup;
};
mdb_txn_abort(transaction);
return 1;
cleanup:
mdb_txn_abort(transaction);
return 0;
}
uint32_t pks_get_count(t_omemo *omemo, int increment)
{
uint32_t count = PRE_KEY_START;
MDB_txn *transaction = NULL;
MDB_val k_pre_key_idx = mdb_val_str("pre_key_idx");
MDB_val v_pre_key_idx = mdb_val_intptr(&count);
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_get(transaction, omemo->dbi.omemo,
&k_pre_key_idx, &v_pre_key_idx))
{
if (increment)
count += PRE_KEY_COUNT;
}
if (mdb_put(transaction, omemo->dbi.omemo,
&k_pre_key_idx, &v_pre_key_idx, 0))
{
weechat_printf(NULL, "%sxmpp: failed to read lmdb value",
weechat_prefix("error"));
goto cleanup;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
return count;
cleanup:
mdb_txn_abort(transaction);
return 0;
}
int pks_load_pre_key(struct signal_buffer **record, uint32_t pre_key_id, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_pre_key = {
.mv_size = strlen("pre_key_") + 10, // strlen(UINT32_MAX)
.mv_data = NULL,
};
MDB_val v_pre_key;
k_pre_key.mv_data = malloc(sizeof(char) * (
k_pre_key.mv_size + 1));
k_pre_key.mv_size =
snprintf((char*)k_pre_key.mv_data, k_pre_key.mv_size + 1,
"pre_key_%-10u", pre_key_id);
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_get(transaction, omemo->dbi.omemo,
&k_pre_key, &v_pre_key))
{
*record = signal_buffer_create((const uint8_t*)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"));
goto cleanup;
};
}
else
{
mdb_txn_abort(transaction);
signal_protocol_key_helper_pre_key_list_node *pre_keys_list;
session_pre_key *pre_key = NULL;
for (signal_protocol_key_helper_generate_pre_keys(&pre_keys_list,
pks_get_count(omemo, 1), PRE_KEY_COUNT,
omemo->context); pre_keys_list;
pre_keys_list = signal_protocol_key_helper_key_list_next(pre_keys_list))
{
pre_key = signal_protocol_key_helper_key_list_element(pre_keys_list);
uint32_t id = session_pre_key_get_id(pre_key);
session_pre_key_serialize(record, pre_key);
pks_store_pre_key(id, signal_buffer_data(*record),
signal_buffer_len(*record), user_data);
}
signal_protocol_key_helper_key_list_free(pre_keys_list);
}
return 0;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
int pks_remove_pre_key(uint32_t pre_key_id, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_pre_key = {
.mv_size = strlen("pre_key_") + 10, // strlen(UINT32_MAX)
.mv_data = NULL,
};
MDB_val v_pre_key;
k_pre_key.mv_data = malloc(sizeof(char) * (
k_pre_key.mv_size + 1));
k_pre_key.mv_size =
snprintf((char*)k_pre_key.mv_data, k_pre_key.mv_size + 1,
"pre_key_%-10u", pre_key_id);
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_del(transaction, omemo->dbi.omemo, &k_pre_key,
&v_pre_key)) {
weechat_printf(NULL, "%sxmpp: failed to erase lmdb value",
weechat_prefix("error"));
goto cleanup;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to close lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
return 0;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
void pks_destroy_func(void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
(void) omemo;
// Function called to perform cleanup when the data store context is being destroyed
}
int spks_load_signed_pre_key(struct signal_buffer **record, uint32_t signed_pre_key_id, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_signed_pre_key = {
.mv_size = strlen("signed_pre_key_") + 10, // strlen(UINT32_MAX)
.mv_data = NULL,
};
MDB_val v_signed_pre_key;
k_signed_pre_key.mv_data = malloc(sizeof(char) * (
k_signed_pre_key.mv_size + 1));
k_signed_pre_key.mv_size =
snprintf((char*)k_signed_pre_key.mv_data, k_signed_pre_key.mv_size + 1,
"signed_pre_key_%-10u", signed_pre_key_id);
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_get(transaction, omemo->dbi.omemo,
&k_signed_pre_key, &v_signed_pre_key))
{
*record = signal_buffer_create((const uint8_t*)v_signed_pre_key.mv_data, v_signed_pre_key.mv_size);
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to close lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
}
else
{
session_signed_pre_key *signed_pre_key = NULL;
struct signal_buffer *serialized_key = NULL;
signal_protocol_key_helper_generate_signed_pre_key(&signed_pre_key, omemo->identity, signed_pre_key_id, time(NULL), omemo->context);
session_signed_pre_key_serialize(&serialized_key, signed_pre_key);
v_signed_pre_key.mv_data = signal_buffer_data(serialized_key);
v_signed_pre_key.mv_size = signal_buffer_len(serialized_key);
if (mdb_put(transaction, omemo->dbi.omemo,
&k_signed_pre_key, &v_signed_pre_key, MDB_NOOVERWRITE))
{
weechat_printf(NULL, "%sxmpp: failed to read lmdb value",
weechat_prefix("error"));
goto cleanup;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
*record = serialized_key;
}
return 0;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
int spks_store_signed_pre_key(uint32_t signed_pre_key_id, uint8_t *record, size_t record_len, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_signed_pre_key = {
.mv_size = strlen("signed_pre_key_") + 10, // strlen(UINT32_MAX)
.mv_data = NULL,
};
MDB_val v_signed_pre_key = {.mv_size = record_len, .mv_data = record};
k_signed_pre_key.mv_data = malloc(sizeof(char) * (
k_signed_pre_key.mv_size + 1));
k_signed_pre_key.mv_size =
snprintf((char*)k_signed_pre_key.mv_data, k_signed_pre_key.mv_size + 1,
"signed_pre_key_%-10u", signed_pre_key_id);
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->dbi.omemo, &k_signed_pre_key,
&v_signed_pre_key, 0)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb value",
weechat_prefix("error"));
goto cleanup;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
return 0;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
int spks_contains_signed_pre_key(uint32_t signed_pre_key_id, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_signed_pre_key = {
.mv_size = strlen("signed_pre_key_") + 10, // strlen(UINT32_MAX)
.mv_data = NULL,
};
MDB_val v_signed_pre_key;
k_signed_pre_key.mv_data = malloc(sizeof(char) * (
k_signed_pre_key.mv_size + 1));
k_signed_pre_key.mv_size =
snprintf((char*)k_signed_pre_key.mv_data, k_signed_pre_key.mv_size + 1,
"signed_pre_key_%-10u", signed_pre_key_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->dbi.omemo, &k_signed_pre_key,
&v_signed_pre_key)) {
mdb_txn_abort(transaction);
goto cleanup;
};
mdb_txn_abort(transaction);
return 1;
cleanup:
mdb_txn_abort(transaction);
return 0;
}
int spks_remove_signed_pre_key(uint32_t signed_pre_key_id, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_signed_pre_key = {
.mv_size = strlen("signed_pre_key_") + 10, // strlen(UINT32_MAX)
.mv_data = NULL,
};
MDB_val v_signed_pre_key;
k_signed_pre_key.mv_data = malloc(sizeof(char) * (
k_signed_pre_key.mv_size + 1));
k_signed_pre_key.mv_size =
snprintf((char*)k_signed_pre_key.mv_data, k_signed_pre_key.mv_size + 1,
"signed_pre_key_%-10u", signed_pre_key_id);
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_del(transaction, omemo->dbi.omemo, &k_signed_pre_key,
&v_signed_pre_key)) {
weechat_printf(NULL, "%sxmpp: failed to erase lmdb value",
weechat_prefix("error"));
goto cleanup;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to close lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
return 0;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
void spks_destroy_func(void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
(void) omemo;
// Function called to perform cleanup when the data store context is being destroyed
}
int ss_load_session_func(struct signal_buffer **record, signal_buffer **user_record, const struct signal_protocol_address *address, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_session = {
.mv_size = strlen("session_") + 10 + //strlen(address->device_id) +
1 + strlen(address->name),
.mv_data = NULL,
};
MDB_val v_session;
MDB_val k_user = {
.mv_size = strlen("user_") + 10 + //strlen(address->device_id) +
1 + strlen(address->name),
.mv_data = NULL,
};
MDB_val v_user; (void) v_user; (void) user_record;
k_session.mv_data = malloc(sizeof(char) * (k_session.mv_size + 1));
k_session.mv_size =
snprintf((char*)k_session.mv_data, k_session.mv_size + 1,
"session_%u_%s", address->device_id, address->name);
k_user.mv_data = malloc(sizeof(char) * (k_user.mv_size + 1));
k_user.mv_size =
snprintf((char*)k_user.mv_data, k_user.mv_size + 1,
"user_%u_%s", address->device_id, address->name);
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->dbi.omemo,
&k_session, &v_session)/* ||
mdb_get(transaction, omemo->dbi.omemo,
&k_user, &v_user)*/)
{
mdb_txn_abort(transaction);
return 0;
}
*record = signal_buffer_create((const uint8_t*)v_session.mv_data, v_session.mv_size);
//*user_record = signal_buffer_create(v_user.mv_data, v_user.mv_size);
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to close lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
return 1;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
int ss_get_sub_device_sessions_func(signal_int_list **sessions, const char *name, size_t name_len, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_device_ids = {
.mv_size = strlen("device_ids_") + name_len,
.mv_data = NULL,
};
MDB_val v_device_ids;
k_device_ids.mv_data = malloc(sizeof(char) * (
k_device_ids.mv_size + 1));
snprintf((char*)k_device_ids.mv_data, k_device_ids.mv_size + 1,
"device_ids_%s", name);
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->dbi.omemo,
&k_device_ids, &v_device_ids))
{
char **argv;
int argc, i;
signal_int_list *list = signal_int_list_alloc();
if (!list) {
goto cleanup;
}
argv = weechat_string_split((const char*)v_device_ids.mv_data, " ", NULL, 0, 0, &argc);
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to close lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
for (i = 0; i < argc; i++)
{
char* device_id = argv[i];
signal_int_list_push_back(list, strtol(device_id, NULL, 10));
}
weechat_string_free_split(argv);
*sessions = list;
return argc;
}
else
{
mdb_txn_abort(transaction);
return 0;
}
cleanup:
mdb_txn_abort(transaction);
return -1;
}
int ss_store_session_func(const struct signal_protocol_address *address, uint8_t *record, size_t record_len, uint8_t *user_record, size_t user_record_len, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_session = {
.mv_size = strlen("session_") + 10 + //strlen(address->device_id) +
1 + strlen(address->name),
.mv_data = NULL,
};
MDB_val v_session = {.mv_size = record_len, .mv_data = record};
MDB_val k_user = {
.mv_size = strlen("user_") + 10 + //strlen(address->device_id) +
1 + strlen(address->name),
.mv_data = NULL,
};
MDB_val v_user = {.mv_size = user_record_len, .mv_data = user_record}; (void) v_user;
k_session.mv_data = malloc(sizeof(char) * (
k_session.mv_size + 1));
k_session.mv_size =
snprintf((char*)k_session.mv_data, k_session.mv_size + 1,
"session_%u_%s", address->device_id, address->name);
k_user.mv_data = malloc(sizeof(char) * (
k_user.mv_size + 1));
k_user.mv_size =
snprintf((char*)k_user.mv_data, k_user.mv_size + 1,
"user_%u_%s", address->device_id, address->name);
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->dbi.omemo,
&k_session, &v_session, 0)/* ||
mdb_put(transaction, omemo->dbi.omemo,
&k_user, &v_user, 0)*/) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb value",
weechat_prefix("error"));
goto cleanup;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
return 0;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
int ss_contains_session_func(const struct signal_protocol_address *address, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_session = {
.mv_size = strlen("session_") + 10 + //strlen(address->device_id) +
1 + strlen(address->name),
.mv_data = NULL,
};
MDB_val v_session;
k_session.mv_data = malloc(sizeof(char) * (
k_session.mv_size + 1));
k_session.mv_size =
snprintf((char*)k_session.mv_data, k_session.mv_size + 1,
"session_%u_%s", address->device_id, address->name);
if (mdb_txn_begin(omemo->db_env, NULL, MDB_RDONLY, &transaction)) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb transaction",
weechat_prefix("error"));
return 0;
}
if (mdb_get(transaction, omemo->dbi.omemo, &k_session, &v_session)) {
mdb_txn_abort(transaction);
return 0;
};
mdb_txn_abort(transaction);
return 1;
}
int ss_delete_session_func(const struct signal_protocol_address *address, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_session = {
.mv_size = strlen("session_") + 10 + //strlen(address->device_id) +
1 + strlen(address->name),
.mv_data = NULL,
};
MDB_val v_session;
k_session.mv_data = malloc(sizeof(char) * (
k_session.mv_size + 1));
k_session.mv_size =
snprintf((char*)k_session.mv_data, k_session.mv_size + 1,
"session_%u_%s", address->device_id, address->name);
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_del(transaction, omemo->dbi.omemo, &k_session, &v_session)) {
weechat_printf(NULL, "%sxmpp: failed to erase lmdb value",
weechat_prefix("error"));
goto cleanup;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to close lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
return 1;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
int ss_delete_all_sessions_func(const char *name, size_t name_len, void *user_data)
{
signal_int_list *sessions;
ss_get_sub_device_sessions_func(&sessions, name, name_len, user_data);
int n = signal_int_list_size(sessions);
for (int i = 0; i < n; i++)
{
struct signal_protocol_address address = {.name = name, .name_len = name_len,
.device_id = signal_int_list_at(sessions, i)};
ss_delete_session_func(&address, user_data);
}
signal_int_list_free(sessions);
return -1;
}
void ss_destroy_func(void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
(void) omemo;
// Function called to perform cleanup when the data store context is being destroyed
}
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)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
char *device_list = NULL;
MDB_txn *transaction = NULL;
MDB_val k_sender_key = {
.mv_size = strlen("sender_key_") + strlen(sender_key_name->group_id) +
1 + 10 + //strlen(sender_key_name->sender.device_id) +
1 + strlen(sender_key_name->sender.name),
.mv_data = NULL,
};
MDB_val v_sender_key = {.mv_size = record_len, .mv_data = record};
MDB_val k_user = {
.mv_size = strlen("user_") + strlen(sender_key_name->group_id) +
1 + 10 + //strlen(sender_key_name->sender.device_id) +
1 + strlen(sender_key_name->sender.name),
.mv_data = NULL,
};
MDB_val v_user = {.mv_size = user_record_len, .mv_data = user_record}; (void) v_user;
MDB_val k_device_ids = {
.mv_size = strlen("device_ids_") + strlen(sender_key_name->sender.name),
.mv_data = NULL,
};
MDB_val v_device_ids;
k_sender_key.mv_data = malloc(sizeof(char) * (
k_sender_key.mv_size + 1));
k_sender_key.mv_size =
snprintf((char*)k_sender_key.mv_data, k_sender_key.mv_size + 1,
"sender_key_%s_%u_%s", sender_key_name->group_id,
sender_key_name->sender.device_id,
sender_key_name->sender.name);
k_user.mv_data = malloc(sizeof(char) * (
k_user.mv_size + 1));
k_user.mv_size =
snprintf((char*)k_user.mv_data, k_user.mv_size + 1,
"user_%s_%u_%s", sender_key_name->group_id,
sender_key_name->sender.device_id,
sender_key_name->sender.name);
k_device_ids.mv_data = malloc(sizeof(char) * (
k_device_ids.mv_size + 1));
snprintf((char*)k_device_ids.mv_data, k_device_ids.mv_size + 1,
"device_ids_%s", sender_key_name->sender.name);
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_get(transaction, omemo->dbi.omemo,
&k_device_ids, &v_device_ids))
{
char **argv;
int argc, i;
argv = weechat_string_split((const char*)v_device_ids.mv_data, " ", NULL, 0, 0, &argc);
for (i = 0; i < argc; i++)
{
char* device_id = argv[i];
if (strtol(device_id, NULL, 10) == sender_key_name->sender.device_id) break;
}
weechat_string_free_split(argv);
if (i == argc)
{
size_t device_list_len = strlen((const char*)v_device_ids.mv_data) + 1 + 10 + 1;
device_list = (char*)malloc(sizeof(char) * device_list_len);
snprintf(device_list, device_list_len, "%s %u",
(char*)v_device_ids.mv_data, sender_key_name->sender.device_id);
v_device_ids.mv_data = device_list;
v_device_ids.mv_size = strlen(device_list) + 1;
}
}
else
{
device_list = (char*)malloc(sizeof(char) * (10 + 1));
snprintf(device_list, 10 + 1, "%u", sender_key_name->sender.device_id);
v_device_ids.mv_data = device_list;
v_device_ids.mv_size = strlen(device_list) + 1;
}
if (mdb_put(transaction, omemo->dbi.omemo,
&k_sender_key, &v_sender_key, 0)/* ||
mdb_put(transaction, omemo->dbi.omemo,
&k_user, &v_user, 0)*/ ||
mdb_put(transaction, omemo->dbi.omemo,
&k_device_ids, &v_device_ids, 0)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb value",
weechat_prefix("error"));
goto cleanup;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
free(device_list);
return 0;
cleanup:
free(device_list);
mdb_txn_abort(transaction);
return -1;
}
int sks_load_sender_key(struct signal_buffer **record, signal_buffer **user_record, const signal_protocol_sender_key_name *sender_key_name, void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
MDB_txn *transaction = NULL;
MDB_val k_sender_key = {
.mv_size = strlen("sender_key_") + strlen(sender_key_name->group_id) +
1 + 10 + //strlen(sender_key_name->sender.device_id) +
1 + strlen(sender_key_name->sender.name),
.mv_data = NULL,
};
MDB_val v_sender_key;
MDB_val k_user = {
.mv_size = strlen("user_") + strlen(sender_key_name->group_id) +
1 + 10 + //strlen(sender_key_name->sender.device_id) +
1 + strlen(sender_key_name->sender.name),
.mv_data = NULL,
};
MDB_val v_user; (void) v_user; (void) user_record;
k_sender_key.mv_data = malloc(sizeof(char) * (
k_sender_key.mv_size + 1));
k_sender_key.mv_size =
snprintf((char*)k_sender_key.mv_data, k_sender_key.mv_size + 1,
"sender_key_%s_%u_%s", sender_key_name->group_id,
sender_key_name->sender.device_id,
sender_key_name->sender.name);
k_user.mv_data = malloc(sizeof(char) * (
k_user.mv_size + 1));
k_user.mv_size =
snprintf((char*)k_user.mv_data, k_user.mv_size + 1,
"user_%s_%u_%s", sender_key_name->group_id,
sender_key_name->sender.device_id,
sender_key_name->sender.name);
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_get(transaction, omemo->dbi.omemo,
&k_sender_key, &v_sender_key)/* &&
mdb_get(transaction, omemo->dbi.omemo,
&k_user, &v_user)*/)
{
*record = signal_buffer_create((const uint8_t*)v_sender_key.mv_data, v_sender_key.mv_size);
//*user_record = signal_buffer_create(v_user.mv_data, v_user.mv_size);
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to close lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
}
else
{
goto cleanup;
}
return 0;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
void sks_destroy_func(void *user_data)
{
auto omemo = reinterpret_cast<t_omemo*>(user_data);
(void) omemo;
// Function called to perform cleanup when the data store context is being destroyed
}
int dls_store_devicelist(const char *jid, signal_int_list *devicelist, t_omemo *omemo)
{
MDB_txn *transaction = NULL;
MDB_val k_devicelist = {
.mv_size = strlen("devicelist_") + strlen(jid),
.mv_data = NULL,
};
MDB_val v_devicelist;
k_devicelist.mv_data = malloc(sizeof(char) * (
k_devicelist.mv_size + 1));
k_devicelist.mv_size =
snprintf((char*)k_devicelist.mv_data, k_devicelist.mv_size + 1,
"devicelist_%s", jid);
char *devices[128] = {0};
for (size_t i = 0; i < signal_int_list_size(devicelist); i++)
{
int device = signal_int_list_at(devicelist, i);
devices[i] = (char*)malloc(sizeof(*devices) * (10 + 1));
devices[i+1] = NULL;
snprintf(devices[i], 10 + 1, "%u", device);
}
v_devicelist.mv_data = weechat_string_build_with_split_string(
(const char **)devices, ";");
v_devicelist.mv_size = strlen((const char*)v_devicelist.mv_data);
for (char **device = (char **)devices; *device; device++) free(*device);
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->dbi.omemo, &k_devicelist,
&v_devicelist, 0)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb value",
weechat_prefix("error"));
goto cleanup;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
return 0;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
int dls_load_devicelist(signal_int_list **devicelist, const char *jid, t_omemo *omemo)
{
auto transaction = lmdb::txn::begin(omemo->db_env);
std::string k_devicelist = fmt::format("devicelist_{}", jid);
std::string_view v_devicelist;
omemo->dbi.omemo.get(transaction, k_devicelist, v_devicelist);
int devices_len = 0;
char **devices = weechat_string_split(v_devicelist.data(), ";", NULL, 0, 0, &devices_len);
*devicelist = signal_int_list_alloc();
for (int i = 0; i < devices_len; i++)
{
char* device_id = devices[i];
signal_int_list_push_back(*devicelist, strtol(device_id, NULL, 10));
}
weechat_string_free_split(devices);
transaction.commit();
return 0;
}
int bks_store_bundle(struct signal_protocol_address *address,
struct t_pre_key **pre_keys, struct t_pre_key **signed_pre_keys,
const char *signature, const char *identity_key, t_omemo *omemo)
{
size_t n_pre_keys = -1;
while (pre_keys[++n_pre_keys] != NULL);
char **pre_key_buffers = (char**)malloc(sizeof(char*) * (n_pre_keys + 1));
for (size_t i = 0; i < n_pre_keys; i++)
{
struct t_pre_key *pre_key = pre_keys[i];
size_t keylen = 10 + strlen(pre_key->public_key) + 1;
pre_key_buffers[i] = (char*)malloc(sizeof(char) * keylen);
pre_key_buffers[i+1] = NULL;
snprintf(pre_key_buffers[i], keylen,
"%s.%s", pre_key->id, pre_key->public_key);
}
size_t n_signed_pre_keys = -1;
while (signed_pre_keys[++n_signed_pre_keys] != NULL);
char **signed_pre_key_buffers = (char**)malloc(sizeof(char*) * (n_signed_pre_keys + 1));
for (size_t i = 0; i < n_signed_pre_keys; i++)
{
struct t_pre_key *signed_pre_key = signed_pre_keys[i];
size_t keylen = 10 + 1 + strlen(signed_pre_key->public_key);
signed_pre_key_buffers[i] = (char*)malloc(sizeof(char) * (keylen + 1));
signed_pre_key_buffers[i+1] = NULL;
snprintf(signed_pre_key_buffers[i], keylen + 1,
"%s.%s", signed_pre_key->id, signed_pre_key->public_key);
uint8_t *signing_key_buf;
size_t signing_key_len = base64_decode(identity_key,
strlen(identity_key), &signing_key_buf);
libsignal::public_key signing_key(signing_key_buf,
signing_key_len, omemo->context);
uint8_t *signed_key_buf;
size_t signed_key_len = base64_decode(signed_pre_key->public_key,
strlen(signed_pre_key->public_key), &signed_key_buf);
uint8_t *signature_buf;
size_t signature_len = base64_decode(signature,
strlen(signature), &signature_buf);
int valid = curve_verify_signature(signing_key,
signed_key_buf, signed_key_len,
signature_buf, signature_len);
if (valid <= 0) {
weechat_printf(NULL, "%somemo: failed to validate ED25519 signature for %s:%u",
weechat_prefix("error"), address->name, address->device_id);
}
}
MDB_txn *transaction = NULL;
const char *jid = address->name;
uint32_t device_id = address->device_id;
size_t keylen = strlen("bundle_??_") + strlen(jid) + 1 + 10 + 1;
MDB_val k_bundle_pk = {
.mv_size = 0,
.mv_data = malloc(sizeof(char) * (keylen + 1)),
};
k_bundle_pk.mv_size = snprintf((char*)k_bundle_pk.mv_data, keylen,
"bundle_pk_%s_%u", jid, device_id);
MDB_val k_bundle_sk = {
.mv_size = 0,
.mv_data = malloc(sizeof(char) * (keylen + 1)),
};
k_bundle_sk.mv_size = snprintf((char*)k_bundle_sk.mv_data, keylen,
"bundle_sk_%s_%u", jid, device_id);
MDB_val k_bundle_sg = {
.mv_size = 0,
.mv_data = malloc(sizeof(char) * (keylen + 1)),
};
k_bundle_sg.mv_size = snprintf((char*)k_bundle_sg.mv_data, keylen,
"bundle_sg_%s_%u", jid, device_id);
MDB_val k_bundle_ik = {
.mv_size = 0,
.mv_data = malloc(sizeof(char) * (keylen + 1)),
};
k_bundle_ik.mv_size = snprintf((char*)k_bundle_ik.mv_data, keylen,
"bundle_ik_%s_%u", jid, device_id);
MDB_val v_bundle_pk = {
.mv_size = 0,
.mv_data = weechat_string_build_with_split_string(
(const char **)pre_key_buffers, ";"),
};
v_bundle_pk.mv_size = strlen((const char*)v_bundle_pk.mv_data) + 1;
MDB_val v_bundle_sk = {
.mv_size = 0,
.mv_data = weechat_string_build_with_split_string(
(const char **)signed_pre_key_buffers, ";"),
};
v_bundle_sk.mv_size = strlen((const char*)v_bundle_sk.mv_data) + 1;
MDB_val v_bundle_sg = {
.mv_size = strlen(signature),
.mv_data = (char*)signature,
};
MDB_val v_bundle_ik = {
.mv_size = strlen(identity_key),
.mv_data = (char*)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;
}
int ret;
if ((ret = mdb_put(transaction, omemo->dbi.omemo, &k_bundle_pk,
&v_bundle_pk, 0)) ||
(ret = mdb_put(transaction, omemo->dbi.omemo, &k_bundle_sk,
&v_bundle_sk, 0)) ||
(ret = mdb_put(transaction, omemo->dbi.omemo, &k_bundle_sg,
&v_bundle_sg, 0)) ||
(ret = mdb_put(transaction, omemo->dbi.omemo, &k_bundle_ik,
&v_bundle_ik, 0))) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb value '%s'@%u: %s",
weechat_prefix("error"), v_bundle_pk.mv_data, v_bundle_pk.mv_size, mdb_strerror(ret));
goto cleanup;
};
if ((ret = mdb_txn_commit(transaction))) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
return 0;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
int bks_load_bundle(session_pre_key_bundle **bundle, struct signal_protocol_address *address, t_omemo *omemo)
{
MDB_txn *transaction = NULL;
const char *jid = address->name;
uint32_t device_id = address->device_id;
size_t keylen = strlen("bundle_??_") + address->name_len + 1 + 10 + 1;
MDB_val k_bundle_pk = {
.mv_size = 0,
.mv_data = malloc(sizeof(char) * (keylen + 1)),
};
k_bundle_pk.mv_size = snprintf((char*)k_bundle_pk.mv_data, keylen,
"bundle_pk_%s_%u", jid, device_id);
MDB_val k_bundle_sk = {
.mv_size = 0,
.mv_data = malloc(sizeof(char) * (keylen + 1)),
};
k_bundle_sk.mv_size = snprintf((char*)k_bundle_sk.mv_data, keylen,
"bundle_sk_%s_%u", jid, device_id);
MDB_val k_bundle_sg = {
.mv_size = 0,
.mv_data = malloc(sizeof(char) * (keylen + 1)),
};
k_bundle_sg.mv_size = snprintf((char*)k_bundle_sg.mv_data, keylen,
"bundle_sg_%s_%u", jid, device_id);
MDB_val k_bundle_ik = {
.mv_size = 0,
.mv_data = malloc(sizeof(char) * (keylen + 1)),
};
k_bundle_ik.mv_size = snprintf((char*)k_bundle_ik.mv_data, keylen,
"bundle_ik_%s_%u", jid, device_id);
MDB_val v_bundle_pk;
MDB_val v_bundle_sk;
MDB_val v_bundle_sg;
MDB_val v_bundle_ik;
int ret;
if ((ret = mdb_txn_begin(omemo->db_env, NULL, MDB_RDONLY, &transaction))) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb transaction",
weechat_prefix("error"));
return -1;
}
int bundle_pk_len;
int bundle_sk_len;
char **bundle_pks;
char **bundle_sks;
ec_public_key *pre_key;
ec_public_key *signed_pre_key;
ec_public_key *identity_key;
uint32_t pre_key_id;
uint32_t signed_pre_key_id;
uint8_t *sig_buf; size_t sig_len;
struct signal_buffer *signature;
uint8_t *key_buf; size_t key_len;
if ((ret = mdb_get(transaction, omemo->dbi.omemo,
&k_bundle_pk, &v_bundle_pk)) ||
(ret = mdb_get(transaction, omemo->dbi.omemo,
&k_bundle_sk, &v_bundle_sk)) ||
(ret = mdb_get(transaction, omemo->dbi.omemo,
&k_bundle_sg, &v_bundle_sg)) ||
(ret = mdb_get(transaction, omemo->dbi.omemo,
&k_bundle_ik, &v_bundle_ik)))
{
goto cleanup;
}
bundle_pk_len = 0;
bundle_pks = weechat_string_split((const char*)v_bundle_pk.mv_data, ";", NULL, 0, 0, &bundle_pk_len);
pre_key_id = 0;
{
int i = rand() % bundle_pk_len;
char *bundle_pk = bundle_pks[i];
pre_key_id = strtol(bundle_pk, NULL, 10);
char *key_data = (char *)memchr(bundle_pk, '.', 10 + 1) + 1;
uint8_t *key_buf;
size_t key_len = base64_decode(key_data, strlen(key_data), &key_buf);
if ((ret = curve_decode_point(&pre_key, key_buf, key_len, omemo->context))) {
weechat_printf(NULL, "%sxmpp: failed to decode ED25519 prekey",
weechat_prefix("error"));
goto cleanup;
};
}
bundle_sks = weechat_string_split((const char*)v_bundle_sk.mv_data, ";", NULL, 0, 0, &bundle_sk_len);
{
int i = rand() % bundle_sk_len;
char *bundle_sk = bundle_sks[i];
signed_pre_key_id = strtol(bundle_sk, NULL, 10);
char *key_data = (char *)memchr(bundle_sk, '.', 10 + 1) + 1;
uint8_t *key_buf;
size_t key_len = base64_decode(key_data, strlen(key_data), &key_buf);
if ((ret = curve_decode_point(&signed_pre_key, key_buf, key_len, omemo->context))) {
weechat_printf(NULL, "%sxmpp: failed to decode ED25519 signed prekey",
weechat_prefix("error"));
goto cleanup;
};
}
sig_len = base64_decode((const char*)v_bundle_sg.mv_data, v_bundle_sg.mv_size, &sig_buf);
signature = signal_buffer_create(sig_buf, sig_len);
key_len = base64_decode((const char*)v_bundle_ik.mv_data, v_bundle_ik.mv_size, &key_buf);
if ((ret = curve_decode_point(&identity_key, key_buf, key_len, omemo->context))) {
weechat_printf(NULL, "%sxmpp: failed to decode ED25519 identity key",
weechat_prefix("error"));
goto cleanup;
};
if ((ret = session_pre_key_bundle_create(bundle, device_id, device_id/*?*/, pre_key_id, pre_key, signed_pre_key_id, signed_pre_key, signal_buffer_data(signature), signal_buffer_len(signature), identity_key))) {
weechat_printf(NULL, "%sxmpp: failed to create OMEMO prekey bundle",
weechat_prefix("error"));
goto cleanup;
};
if ((ret = mdb_txn_commit(transaction))) {
weechat_printf(NULL, "%sxmpp: failed to close lmdb transaction",
weechat_prefix("error"));
goto cleanup;
};
return 0;
cleanup:
/*
void session_pre_key_bundle_destroy(signal_type_base *type);
*/
mdb_txn_abort(transaction);
return -1;
}
extern "C"
void 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;
(void)buffer;
weechat_printf_date_tags(
NULL, 0, tags,
_("%somemo (%s): %.*s"),
weechat_prefix("network"),
log_level_name[level], len, message);
}
xmpp_stanza_t *omemo::get_bundle(xmpp_ctx_t *context, char *from, char *to)
{
auto omemo = this;
xmpp_stanza_t **children = (xmpp_stanza_t **)malloc(sizeof(*children) * (100 + 1));
xmpp_stanza_t *parent = NULL;
struct signal_buffer *record = NULL;
ec_key_pair *keypair = NULL;
ec_public_key *public_key = NULL;
int num_keys = 0;
for (uint32_t id = PRE_KEY_START;
id < INT_MAX && num_keys < 100; id++)
{
if (pks_load_pre_key(&record, id, omemo) != 0) continue;
else num_keys++;
session_pre_key *pre_key = NULL;
session_pre_key_deserialize(&pre_key, signal_buffer_data(record),
signal_buffer_len(record), omemo->context);
if (pre_key == 0) (*((int*)0))++;
signal_buffer_free(record);
keypair = session_pre_key_get_key_pair(pre_key);
public_key = ec_key_pair_get_public(keypair);
ec_public_key_serialize(&record, public_key);
char *data = NULL;
base64_encode(signal_buffer_data(record),
signal_buffer_len(record), &data);
signal_buffer_free(record);
if (pre_key) session_pre_key_destroy((signal_type_base*)pre_key);
//SIGNAL_UNREF(pre_key);
char *id_str = (char *)malloc(sizeof(char) * (10 + 1));
snprintf(id_str, 10+1, "%u", id);
children[num_keys-1] = stanza__iq_pubsub_publish_item_bundle_prekeys_preKeyPublic(
context, NULL, NULL, with_free(id_str));
stanza__set_text(context, children[num_keys-1], with_free(data));
}
children[100] = NULL;
children[3] = stanza__iq_pubsub_publish_item_bundle_prekeys(
context, NULL, children);
children[4] = NULL;
spks_load_signed_pre_key(&record, 1, omemo);
session_signed_pre_key *signed_pre_key;
session_signed_pre_key_deserialize(&signed_pre_key,
signal_buffer_data(record), signal_buffer_len(record),
omemo->context);
signal_buffer_free(record);
uint32_t signed_pre_key_id = session_signed_pre_key_get_id(signed_pre_key);
keypair = session_signed_pre_key_get_key_pair(signed_pre_key);
public_key = ec_key_pair_get_public(keypair);
ec_public_key_serialize(&record, public_key);
char *signed_pre_key_public = NULL;
base64_encode(signal_buffer_data(record), signal_buffer_len(record),
&signed_pre_key_public);
signal_buffer_free(record);
char *signed_pre_key_id_str = (char *)malloc(sizeof(char) * (10 + 1));
snprintf(signed_pre_key_id_str, 10+1, "%u", signed_pre_key_id);
children[0] = stanza__iq_pubsub_publish_item_bundle_signedPreKeyPublic(
context, NULL, NULL, with_free(signed_pre_key_id_str));
stanza__set_text(context, children[0], with_free(signed_pre_key_public));
const uint8_t *keysig = session_signed_pre_key_get_signature(signed_pre_key);
size_t keysig_len = session_signed_pre_key_get_signature_len(signed_pre_key);
char *signed_pre_key_signature = NULL;
base64_encode(keysig, keysig_len, &signed_pre_key_signature);
session_pre_key_destroy((signal_type_base*)signed_pre_key);
children[1] = stanza__iq_pubsub_publish_item_bundle_signedPreKeySignature(
context, NULL, NULL);
stanza__set_text(context, children[1], with_free(signed_pre_key_signature));
iks_get_identity_key_pair(&record, (signal_buffer**)&signed_pre_key, omemo);
char *identity_key = NULL;
base64_encode(signal_buffer_data(record), signal_buffer_len(record),
&identity_key);
signal_buffer_free(record);
children[2] = stanza__iq_pubsub_publish_item_bundle_identityKey(
context, NULL, NULL);
stanza__set_text(context, children[2], with_free(identity_key));
children[0] = stanza__iq_pubsub_publish_item_bundle(
context, NULL, children, with_noop("eu.siacs.conversations.axolotl"));
children[1] = NULL;
children[0] = stanza__iq_pubsub_publish_item(
context, NULL, children, NULL);
size_t bundle_node_len = strlen("eu.siacs.conversations.axolotl.bundles:") + 10;
char *bundle_node = (char *)malloc(sizeof(char) * (bundle_node_len + 1));
snprintf(bundle_node, bundle_node_len+1,
"eu.siacs.conversations.axolotl.bundles:%u", omemo->device_id);
children[0] = stanza__iq_pubsub_publish(
context, NULL, children, with_free(bundle_node));
omemo->handle_bundle(from, omemo->device_id, children[0]);
children[0] = stanza__iq_pubsub(
context, NULL, children, with_noop("http://jabber.org/protocol/pubsub"));
parent = stanza__iq(
context, NULL, children, NULL, (char*)"announce2", from, to, (char*)"set");
free(children);
return parent;
}
void omemo::init(struct t_gui_buffer *buffer, const char *account_name)
{
if (!gcry_check_version(GCRYPT_VERSION))
throw std::runtime_error("GCrypt: library version mismatch");
auto omemo = this;
omemo->context.create(buffer);
omemo->context.set_log_function(&log_emit_weechat);
try {
omemo->db_path = std::shared_ptr<char>(
weechat_string_eval_expression("${weechat_data_dir}/xmpp.omemo.db",
NULL, NULL, NULL),
&free).get();
lmdb::env &env = omemo->db_env;
env = lmdb::env::create();
env.set_max_dbs(50);
env.set_mapsize((size_t)1048576 * 8000); // 8000MB map for valgrind
env.open(omemo->db_path.data(), MDB_NOSUBDIR, 0664);
lmdb::txn parentTransaction{nullptr};
lmdb::txn transaction = lmdb::txn::begin(omemo->db_env, parentTransaction);
std::string db_name = fmt::format("omemo_{}", account_name);
omemo->dbi.omemo = lmdb::dbi::open(transaction, db_name.data(), MDB_CREATE);
transaction.commit();
} catch (const std::exception& ex) {
auto format = fmt::format("%sxmpp: lmdb failure - {}", ex.what());
weechat_printf(NULL, format.data(), weechat_prefix("error"));
return;
}
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 = omemo,
};
omemo->context.set_crypto_provider(&crypto_provider);
omemo->context.set_locking_functions(&lock_function, &unlock_function);
omemo->store_context.create(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 = omemo,
};
omemo->store_context.set_identity_key_store(&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 = omemo,
};
omemo->store_context.set_pre_key_store(&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 = omemo,
};
omemo->store_context.set_signed_pre_key_store(&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 = omemo,
};
omemo->store_context.set_session_store(&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 = omemo,
};
omemo->store_context.set_sender_key_store(&sender_key_store);
struct signal_buffer *public_data, *private_data;
iks_get_local_registration_id(omemo, &omemo->device_id);
if (!iks_get_identity_key_pair(&public_data, &private_data, omemo))
{
libsignal::public_key public_key(signal_buffer_data(public_data),
signal_buffer_len(public_data), omemo->context);
libsignal::private_key private_key(signal_buffer_data(private_data),
signal_buffer_len(private_data), omemo->context);
omemo->identity.create(public_key, private_key);
}
weechat_printf(buffer, "%somemo: device = %d",
weechat_prefix("info"), omemo->device_id);
}
void omemo::handle_devicelist(const char *jid, xmpp_stanza_t *items)
{
auto omemo = this;
xmpp_stanza_t *item = xmpp_stanza_get_child_by_name(items, "item");
if (!item) return;
xmpp_stanza_t *list = xmpp_stanza_get_child_by_name(item, "list");
if (!list) return;
signal_int_list *devicelist = signal_int_list_alloc();
for (xmpp_stanza_t *device = xmpp_stanza_get_children(list);
device; device = xmpp_stanza_get_next(device))
{
const char *name = xmpp_stanza_get_name(device);
if (weechat_strcasecmp(name, "device") != 0)
continue;
const char *device_id = xmpp_stanza_get_id(device);
if (!device_id)
continue;
signal_int_list_push_back(devicelist, strtol(device_id, NULL, 10));
}
if (dls_store_devicelist(jid, devicelist, omemo))
weechat_printf(NULL, "%somemo: failed to handle devicelist (%s)",
weechat_prefix("error"), jid);
signal_int_list_free(devicelist);
}
void omemo::handle_bundle(const char *jid, uint32_t device_id,
xmpp_stanza_t *items)
{
auto omemo = this;
xmpp_stanza_t *item = xmpp_stanza_get_child_by_name(items, "item");
if (!item) return;
xmpp_stanza_t *bundle = xmpp_stanza_get_child_by_name(item, "bundle");
if (!bundle) return;
xmpp_stanza_t *signedprekey = xmpp_stanza_get_child_by_name(bundle, "signedPreKeyPublic");
if (!signedprekey) return;
const char *signed_pre_key = xmpp_stanza_get_text(signedprekey);
if (!signed_pre_key) return;
const char *signed_pre_key_id = xmpp_stanza_get_attribute(signedprekey, "signedPreKeyId");
if (!signed_pre_key_id) return;
xmpp_stanza_t *signature = xmpp_stanza_get_child_by_name(bundle, "signedPreKeySignature");
if (!signature) return;
const char *key_signature = xmpp_stanza_get_text(signature);
if (!key_signature) return;
xmpp_stanza_t *identitykey = xmpp_stanza_get_child_by_name(bundle, "identityKey");
if (!identitykey) return;
const char *identity_key = xmpp_stanza_get_text(identitykey);
if (!identity_key) return;
xmpp_stanza_t *prekeys = xmpp_stanza_get_child_by_name(bundle, "prekeys");
if (!prekeys) return;
int num_prekeys = 0;
for (xmpp_stanza_t *prekey = xmpp_stanza_get_children(prekeys);
prekey; prekey = xmpp_stanza_get_next(prekey))
num_prekeys++;
struct t_pre_key **pre_keys = (struct t_pre_key **)malloc(sizeof(struct t_pre_key) * num_prekeys);
num_prekeys = -1;
char **format = weechat_string_dyn_alloc(256);
weechat_string_dyn_concat(format, "omemo bundle %s/%u:\n%s..SPK %u: %s\n%3$s..SKS: %s\n%3$s..IK: %s", -1);
for (xmpp_stanza_t *prekey = xmpp_stanza_get_children(prekeys);
prekey; prekey = xmpp_stanza_get_next(prekey))
{
const char *name = xmpp_stanza_get_name(prekey);
if (weechat_strcasecmp(name, "preKeyPublic") != 0)
continue;
const char *pre_key_id = xmpp_stanza_get_attribute(prekey, "preKeyId");
if (!pre_key_id)
continue;
const char *pre_key = xmpp_stanza_get_text(prekey);
if (!pre_key)
continue;
pre_keys[++num_prekeys] = (struct t_pre_key*)malloc(sizeof(struct t_pre_key));
pre_keys[num_prekeys]->id = pre_key_id;
pre_keys[num_prekeys]->public_key = pre_key;
weechat_string_dyn_concat(format, "\n%3$s..PK ", -1);
weechat_string_dyn_concat(format, pre_key_id, -1);
weechat_string_dyn_concat(format, ": ", -1);
weechat_string_dyn_concat(format, pre_key, -1);
}
pre_keys[num_prekeys] = NULL;
weechat_string_dyn_free(format, 1);
struct t_pre_key signed_key = {
.id = signed_pre_key_id,
.public_key = signed_pre_key,
};
struct t_pre_key *signed_pre_keys[2] = { &signed_key, NULL };
struct signal_protocol_address address = {
.name = jid, .name_len = strlen(jid), .device_id = (int32_t)device_id };
{
uint8_t *key_buf;
size_t key_len = base64_decode(identity_key,
strlen(identity_key), &key_buf);
libsignal::public_key key(key_buf, key_len, omemo->context);
signal_protocol_identity_save_identity(omemo->store_context,
&address, key);
}
bks_store_bundle(&address, pre_keys, signed_pre_keys,
key_signature, identity_key, omemo);
}
char *omemo::decode(struct t_account *account, const char *jid,
xmpp_stanza_t *encrypted)
{
auto omemo = &account->omemo;
uint8_t *key_data = NULL, *tag_data = NULL, *iv_data = NULL, *payload_data = NULL;
size_t key_len = 0, tag_len = 0, iv_len = 0, payload_len = 0;
xmpp_stanza_t *header = xmpp_stanza_get_child_by_name(encrypted, "header");
if (!header) return NULL;
xmpp_stanza_t *iv = xmpp_stanza_get_child_by_name(header, "iv");
if (!iv) return NULL;
const char *iv__text = xmpp_stanza_get_text(iv);
if (!iv__text) return NULL;
iv_len = base64_decode(iv__text, strlen(iv__text), &iv_data);
if (iv_len != AES_IV_SIZE) return NULL;
char **format = weechat_string_dyn_alloc(256);
weechat_string_dyn_concat(format, "omemo msg %s:\n%s..IV: %s", -1);
for (xmpp_stanza_t *key = xmpp_stanza_get_children(header);
key; key = xmpp_stanza_get_next(key))
{
const char *name = xmpp_stanza_get_name(key);
if (weechat_strcasecmp(name, "key") != 0)
continue;
const char *key_prekey = xmpp_stanza_get_attribute(key, "prekey");
const char *key_id = xmpp_stanza_get_attribute(key, "rid");
if (!key_id)
continue;
if (strtol(key_id, NULL, 10) != omemo->device_id)
continue;
xmpp_stanza_t *key_text = xmpp_stanza_get_children(key);
const char *data = key_text ? xmpp_stanza_get_text(key_text) : NULL;
if (!data)
continue;
key_len = base64_decode(data, strlen(data), &key_data);
weechat_string_dyn_concat(format, "\n%2$s..K ", -1);
if (key_prekey)
weechat_string_dyn_concat(format, "*", -1);
weechat_string_dyn_concat(format, key_id, -1);
weechat_string_dyn_concat(format, ": ", -1);
weechat_string_dyn_concat(format, data, -1);
const char *source_id = xmpp_stanza_get_attribute(header, "sid");
if (!source_id)
continue;
int ret;
struct signal_protocol_address address = {
.name = jid, .name_len = strlen(jid), .device_id = (int32_t)strtol(source_id, NULL, 10) };
signal_message *key_message = NULL;
struct signal_buffer *aes_key = NULL;
if (key_prekey) {
pre_key_signal_message *pre_key_message = NULL;
if ((ret = pre_key_signal_message_deserialize(&pre_key_message,
key_data, key_len, omemo->context))) return NULL;
ec_public_key *identity_key = pre_key_signal_message_get_identity_key(pre_key_message);
//uint32_t device_id = pre_key_signal_message_get_registration_id(pre_key_message);
//uint32_t pre_key_id = pre_key_signal_message_get_pre_key_id(pre_key_message);
//uint32_t signed_key_id = pre_key_signal_message_get_signed_pre_key_id(pre_key_message);
//ec_public_key *base_key = pre_key_signal_message_get_base_key(pre_key_message);
key_message = pre_key_signal_message_get_signal_message(pre_key_message);
struct signal_buffer *identity_buf;
if ((ret = ec_public_key_serialize(&identity_buf, identity_key))) return NULL;
if ((ret = iks_save_identity(&address, signal_buffer_data(identity_buf),
signal_buffer_len(identity_buf), omemo))) return NULL;
struct session_cipher *cipher;
if ((ret = session_cipher_create(&cipher, omemo->store_context,
&address, omemo->context))) return NULL;
if ((ret = session_cipher_decrypt_pre_key_signal_message(cipher,
pre_key_message,
0, &aes_key))) return NULL;
} else {
if ((ret = signal_message_deserialize(&key_message,
key_data, key_len, omemo->context))) return NULL;
struct session_cipher *cipher;
if ((ret = session_cipher_create(&cipher, omemo->store_context,
&address, omemo->context))) return NULL;
if ((ret = session_cipher_decrypt_signal_message(cipher, key_message,
0, &aes_key))) return NULL;
}
if (!aes_key) return NULL;
key_data = signal_buffer_data(aes_key);
key_len = signal_buffer_len(aes_key);
if (key_len >= AES_KEY_SIZE) {
tag_len = key_len - AES_KEY_SIZE;
tag_data = key_data + AES_KEY_SIZE;
key_len = AES_KEY_SIZE;
}
else
{
return NULL;
}
char *aes_key64 = NULL;
if (base64_encode(key_data, key_len, &aes_key64) && aes_key64)
{
weechat_string_dyn_concat(format, "\n%2$s..AES: ", -1);
weechat_string_dyn_concat(format, aes_key64, -1);
weechat_string_dyn_concat(format, " (", -1);
snprintf(aes_key64, strlen(aes_key64), "%lu", key_len);
weechat_string_dyn_concat(format, aes_key64, -1);
weechat_string_dyn_concat(format, ")", -1);
}
if (tag_len && base64_encode(tag_data, tag_len, &aes_key64) && aes_key64)
{
weechat_string_dyn_concat(format, "\n%2$s..TAG: ", -1);
weechat_string_dyn_concat(format, aes_key64, -1);
weechat_string_dyn_concat(format, " (", -1);
snprintf(aes_key64, strlen(aes_key64), "%lu", tag_len);
weechat_string_dyn_concat(format, aes_key64, -1);
weechat_string_dyn_concat(format, ")", -1);
}
}
xmpp_stanza_t *payload = xmpp_stanza_get_child_by_name(encrypted, "payload");
if (payload && (payload = xmpp_stanza_get_children(payload)))
{
const char *payload_text = xmpp_stanza_get_text(payload);
if (!payload_text) return NULL;
payload_len = base64_decode(payload_text, strlen(payload_text), &payload_data);
weechat_string_dyn_concat(format, "\n%2$s..PL: ", -1);
weechat_string_dyn_concat(format, payload_text, -1);
}
//weechat_printf(NULL, *format, jid, weechat_color("red"), iv__text);
weechat_string_dyn_free(format, 1);
if (!(payload_data && iv_data && key_data)) return NULL;
if (iv_len != AES_IV_SIZE || key_len != AES_KEY_SIZE) return NULL;
char *plaintext = NULL; size_t plaintext_len = 0;
if (aes_decrypt(payload_data, payload_len, key_data, iv_data, tag_data, tag_len,
(uint8_t**)&plaintext, &plaintext_len) || plaintext)
{
plaintext[plaintext_len] = '\0';
return plaintext;
}
return NULL;
}
xmpp_stanza_t *omemo::encode(struct t_account *account, const char *jid,
const char *unencrypted)
{
auto omemo = &account->omemo;
uint8_t *key = NULL; uint8_t *iv = NULL;
uint8_t *tag = NULL; size_t tag_len = 0;
uint8_t *ciphertext = NULL; size_t ciphertext_len = 0;
aes_encrypt((uint8_t*)unencrypted, strlen(unencrypted),
&key, &iv, &tag, &tag_len,
&ciphertext, &ciphertext_len);
uint8_t *key_and_tag = (uint8_t *)malloc(sizeof(uint8_t) * (AES_KEY_SIZE+tag_len));
memcpy(key_and_tag, key, AES_KEY_SIZE);
free(key);
memcpy(key_and_tag+AES_KEY_SIZE, tag, tag_len);
free(tag);
char *key64 = NULL;
base64_encode(key_and_tag, AES_KEY_SIZE+tag_len, &key64);
char *iv64 = NULL;
base64_encode(iv, AES_IV_SIZE, &iv64);
free(iv);
char *ciphertext64 = NULL;
base64_encode(ciphertext, ciphertext_len, &ciphertext64);
free(ciphertext);
xmpp_stanza_t *encrypted = xmpp_stanza_new(account->context);
xmpp_stanza_set_name(encrypted, "encrypted");
xmpp_stanza_set_ns(encrypted, "eu.siacs.conversations.axolotl");
xmpp_stanza_t *header = xmpp_stanza_new(account->context);
xmpp_stanza_set_name(header, "header");
char device_id_str[10+1] = {0};
snprintf(device_id_str, 10+1, "%u", omemo->device_id);
xmpp_stanza_set_attribute(header, "sid", device_id_str);
int ret, keycount = 0;
signal_int_list *devicelist;
const char *target = jid;
for (int self = 0; self <= 1; self++)
{
if ((ret = dls_load_devicelist(&devicelist, target, omemo))) return NULL;
for (size_t i = 0; i < signal_int_list_size(devicelist); i++)
{
uint32_t device_id = signal_int_list_at(devicelist, i);
weechat_printf(NULL, "omemo: trying device %u for %s", device_id, jid);
if (!device_id) continue;
struct signal_protocol_address address = {
.name = target, .name_len = strlen(target), .device_id = (int32_t)device_id};
xmpp_stanza_t *header__key = xmpp_stanza_new(account->context);
xmpp_stanza_set_name(header__key, "key");
char device_id_str[10+1] = {0};
snprintf(device_id_str, 10+1, "%u", device_id);
xmpp_stanza_set_attribute(header__key, "rid", device_id_str);
struct session_builder *builder = NULL;
if (((ret = ss_contains_session_func(&address, omemo))) <= 0)
{
struct session_pre_key_bundle *bundle;
if ((ret = bks_load_bundle(&bundle, &address, omemo))) continue;
if ((ret = session_builder_create(&builder, omemo->store_context, &address, omemo->context))) continue;
if ((ret = session_builder_process_pre_key_bundle(builder, bundle))) continue;
}
struct session_cipher *cipher;
if ((ret = session_cipher_create(&cipher, omemo->store_context, &address, omemo->context))) continue;
struct ciphertext_message *signal_message;
if ((ret = session_cipher_encrypt(cipher, key_and_tag, AES_KEY_SIZE+tag_len, &signal_message))) continue;
struct signal_buffer *record = ciphertext_message_get_serialized(signal_message);
int prekey = ciphertext_message_get_type(signal_message) == CIPHERTEXT_PREKEY_TYPE
? 1 : 0;
char *payload = NULL;
base64_encode(signal_buffer_data(record), signal_buffer_len(record),
&payload);
if (prekey)
xmpp_stanza_set_attribute(header__key, "prekey",
prekey ? "true" : "false");
stanza__set_text(account->context, header__key, with_free(payload));
xmpp_stanza_add_child(header, header__key);
xmpp_stanza_release(header__key);
if (target == jid)
keycount++;
signal_buffer_free(record);
//SIGNAL_UNREF(signal_message);
session_cipher_free(cipher);
if (builder)
session_builder_free(builder);
}
signal_int_list_free(devicelist);
target = account_jid(account);
}
free(key_and_tag);
if (keycount == 0) {
weechat_printf(NULL, "omemo: no keys for %s", jid);
return NULL;
}
xmpp_stanza_t *header__iv = xmpp_stanza_new(account->context);
xmpp_stanza_set_name(header__iv, "iv");
stanza__set_text(account->context, header__iv, with_noop(iv64));
xmpp_stanza_add_child(header, header__iv);
xmpp_stanza_release(header__iv);
xmpp_stanza_add_child(encrypted, header);
xmpp_stanza_release(header);
xmpp_stanza_t *encrypted__payload = xmpp_stanza_new(account->context);
xmpp_stanza_set_name(encrypted__payload, "payload");
stanza__set_text(account->context, encrypted__payload, with_noop(ciphertext64));
xmpp_stanza_add_child(encrypted, encrypted__payload);
xmpp_stanza_release(encrypted__payload);
free(iv64);
free(key64);
free(ciphertext64);
return encrypted;
}
omemo::~omemo()
{
}
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