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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 <limits.h>
#include <gcrypt.h>
#include <signal_protocol.h>
#include <key_helper.h>
#include <session_builder.h>
#include <session_cipher.h>
#include <protocol.h>
#include <curve.h>
#include <lmdb.h>
#include <strophe.h>
#include <weechat/weechat-plugin.h>
struct t_omemo_db {
MDB_env *env;
MDB_dbi dbi_omemo;
};
#include "plugin.h"
#include "xmpp/stanza.h"
#include "account.h"
#include "omemo.h"
#include "util.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), \
}
#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 = malloc(sizeof(uint8_t) * length);
return weechat_string_base_decode(64, buffer, (char*)*result);
}
size_t base64_encode(const uint8_t *buffer, size_t length, char **result)
{
*result = malloc(sizeof(char) * (length * 2));
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_AES192,
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 = 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;
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 = gcry_random_bytes(*tag_len, GCRY_STRONG_RANDOM);
*iv = gcry_random_bytes(AES_IV_SIZE, GCRY_STRONG_RANDOM);
*key = gcry_random_bytes(AES_KEY_SIZE + *tag_len, GCRY_STRONG_RANDOM);
gcry_cipher_hd_t cipher = NULL;
if (gcry_cipher_open(&cipher, GCRY_CIPHER_AES192,
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 = 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;
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 = 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;
if (mdb_txn_begin(omemo->db->env, NULL, 0, &transaction)) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb transaction",
weechat_prefix("error"));
goto cleanup;
}
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"));
goto cleanup;
};
}
else
{
struct ratchet_identity_key_pair *identity;
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"));
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(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);
}
return 0;
cleanup:
mdb_txn_abort(transaction);
return -1;
}
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, 0, &transaction)) {
weechat_printf(NULL, "%sxmpp: failed to open lmdb transaction",
weechat_prefix("error"));
goto cleanup;
}
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 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;
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"));
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 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);
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);
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 read 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_store_pre_key(uint32_t pre_key_id, uint8_t *record, size_t record_len, void *user_data)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_pre_key = {
.mv_data = NULL,
.mv_size = strlen("pre_key_") + 10, // strlen(UINT32_MAX)
};
MDB_val v_pre_key = {.mv_data = record, .mv_size = record_len};
k_pre_key.mv_data = malloc(sizeof(char) * (
k_pre_key.mv_size + 1));
k_pre_key.mv_size =
snprintf(k_pre_key.mv_data, k_pre_key.mv_size,
"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->db->dbi_omemo, &k_pre_key,
&v_pre_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 pks_contains_pre_key(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 = {
.mv_data = NULL,
.mv_size = strlen("pre_key_") + 10, // strlen(UINT32_MAX)
};
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(k_pre_key.mv_data, k_pre_key.mv_size,
"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 0;
}
if (mdb_get(transaction, omemo->db->dbi_omemo, &k_pre_key,
&v_pre_key)) {
weechat_printf(NULL, "%sxmpp: failed to read lmdb value",
weechat_prefix("error"));
mdb_txn_abort(transaction);
return 0;
};
mdb_txn_abort(transaction);
return 1;
}
uint32_t pks_get_count(struct t_omemo *omemo, int increment)
{
uint32_t count = PRE_KEY_START;
MDB_txn *transaction;
MDB_val k_pre_key_idx = {
.mv_data = "pre_key_idx",
.mv_size = strlen("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"));
goto cleanup;
}
if (!mdb_get(transaction, omemo->db->dbi_omemo,
&k_pre_key_idx, &v_pre_key_idx))
{
if (increment)
count += PRE_KEY_COUNT;
}
if (mdb_put(transaction, omemo->db->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(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 = {
.mv_data = NULL,
.mv_size = strlen("pre_key_") + 10, // strlen(UINT32_MAX)
};
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(k_pre_key.mv_data, k_pre_key.mv_size,
"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"));
goto cleanup;
}
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"));
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)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_pre_key = {
.mv_data = NULL,
.mv_size = strlen("pre_key_") + 10, // strlen(UINT32_MAX)
};
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(k_pre_key.mv_data, k_pre_key.mv_size,
"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->db->dbi_omemo, &k_pre_key,
&v_pre_key)) {
weechat_printf(NULL, "%sxmpp: failed to erase lmdb value",
weechat_prefix("error"));
return -1;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to close lmdb transaction",
weechat_prefix("error"));
return -1;
};
return 0;
}
void pks_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 spks_load_signed_pre_key(signal_buffer **record, uint32_t signed_pre_key_id, void *user_data)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_signed_pre_key = {
.mv_data = NULL,
.mv_size = strlen("signed_pre_key_") + 10, // strlen(UINT32_MAX)
};
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(k_signed_pre_key.mv_data, k_signed_pre_key.mv_size,
"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"));
goto cleanup;
}
if (!mdb_get(transaction, omemo->db->dbi_omemo,
&k_signed_pre_key, &v_signed_pre_key))
{
*record = signal_buffer_create(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;
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->db->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)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_signed_pre_key = {
.mv_data = NULL,
.mv_size = strlen("signed_pre_key_") + 10, // strlen(UINT32_MAX)
};
MDB_val v_signed_pre_key = {.mv_data = record, .mv_size = record_len};
k_signed_pre_key.mv_data = malloc(sizeof(char) * (
k_signed_pre_key.mv_size + 1));
k_signed_pre_key.mv_size =
snprintf(k_signed_pre_key.mv_data, k_signed_pre_key.mv_size,
"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->db->dbi_omemo, &k_signed_pre_key,
&v_signed_pre_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 spks_contains_signed_pre_key(uint32_t signed_pre_key_id, void *user_data)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_signed_pre_key = {
.mv_data = NULL,
.mv_size = strlen("signed_pre_key_") + 10, // strlen(UINT32_MAX)
};
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(k_signed_pre_key.mv_data, k_signed_pre_key.mv_size,
"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 0;
}
if (mdb_get(transaction, omemo->db->dbi_omemo, &k_signed_pre_key,
&v_signed_pre_key)) {
mdb_txn_abort(transaction);
return 0;
};
mdb_txn_abort(transaction);
return 1;
}
int spks_remove_signed_pre_key(uint32_t signed_pre_key_id, void *user_data)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_signed_pre_key = {
.mv_data = NULL,
.mv_size = strlen("signed_pre_key_") + 10, // strlen(UINT32_MAX)
};
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(k_signed_pre_key.mv_data, k_signed_pre_key.mv_size,
"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->db->dbi_omemo, &k_signed_pre_key,
&v_signed_pre_key)) {
weechat_printf(NULL, "%sxmpp: failed to erase lmdb value",
weechat_prefix("error"));
return -1;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to close lmdb transaction",
weechat_prefix("error"));
return -1;
};
return 0;
}
void spks_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 ss_load_session_func(signal_buffer **record, signal_buffer **user_record, const signal_protocol_address *address, void *user_data)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_session = {
.mv_data = NULL,
.mv_size = strlen("session_") + 10 + //strlen(address->device_id) +
1 + strlen(address->name),
};
MDB_val v_session;
MDB_val k_user = {
.mv_data = NULL,
.mv_size = strlen("user_") + 10 + //strlen(address->device_id) +
1 + strlen(address->name),
};
MDB_val v_user;
k_session.mv_data = malloc(sizeof(char) * (
k_session.mv_size + 1));
k_session.mv_size =
snprintf(k_session.mv_data, k_session.mv_size,
"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(k_user.mv_data, k_user.mv_size,
"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"));
goto cleanup;
}
if (!mdb_get(transaction, omemo->db->dbi_omemo,
&k_session, &v_session)/* &&
!mdb_get(transaction, omemo->db->dbi_omemo,
&k_user, &v_user)*/)
{
*record = signal_buffer_create(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;
};
}
else
{
/*
v_session.mv_data = signal_buffer_data(*record);
v_session.mv_size = signal_buffer_len(*record);
if (mdb_put(transaction, omemo->db->dbi_omemo,
&k_session, &v_session, 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;
};
*/
}
return 0;
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)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_device_ids = {
.mv_data = NULL,
.mv_size = strlen("device_ids_") + name_len,
};
MDB_val v_device_ids;
k_device_ids.mv_data = malloc(sizeof(char) * (
k_device_ids.mv_size + 1));
snprintf(k_device_ids.mv_data, k_device_ids.mv_size,
"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"));
}
if (!mdb_get(transaction, omemo->db->dbi_omemo,
&k_device_ids, &v_device_ids))
{
char **argv;
int argc, i;
signal_int_list *list = signal_int_list_alloc();
if (!list) {
mdb_txn_abort(transaction);
return -1;
}
argv = weechat_string_split(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"));
return -1;
};
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;
}
}
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)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_session = {
.mv_data = NULL,
.mv_size = strlen("session_") + 10 + //strlen(address->device_id) +
1 + strlen(address->name),
};
MDB_val v_session = {.mv_data = record, .mv_size = record_len};
MDB_val k_user = {
.mv_data = NULL,
.mv_size = strlen("user_") + 10 + //strlen(address->device_id) +
1 + strlen(address->name),
};
MDB_val v_user = {.mv_data = user_record, .mv_size = user_record_len};
k_session.mv_data = malloc(sizeof(char) * (
k_session.mv_size + 1));
k_session.mv_size =
snprintf(k_session.mv_data, k_session.mv_size,
"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(k_user.mv_data, k_user.mv_size,
"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->db->dbi_omemo,
&k_session, &v_session, 0)/* ||
mdb_put(transaction, omemo->db->dbi_omemo,
&k_user, &v_user, 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 ss_contains_session_func(const signal_protocol_address *address, void *user_data)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_session = {
.mv_data = NULL,
.mv_size = strlen("session_") + 10 + //strlen(address->device_id) +
1 + strlen(address->name),
};
MDB_val v_session;
k_session.mv_data = malloc(sizeof(char) * (
k_session.mv_size + 1));
k_session.mv_size =
snprintf(k_session.mv_data, k_session.mv_size,
"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 -1;
}
if (mdb_get(transaction, omemo->db->dbi_omemo, &k_session, &v_session)) {
mdb_txn_abort(transaction);
return 1;
};
mdb_txn_abort(transaction);
return 0;
}
int ss_delete_session_func(const signal_protocol_address *address, void *user_data)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_session = {
.mv_data = NULL,
.mv_size = strlen("session_") + 10 + //strlen(address->device_id) +
1 + strlen(address->name),
};
MDB_val v_session;
k_session.mv_data = malloc(sizeof(char) * (
k_session.mv_size + 1));
k_session.mv_size =
snprintf(k_session.mv_data, k_session.mv_size,
"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->db->dbi_omemo, &k_session, &v_session)) {
weechat_printf(NULL, "%sxmpp: failed to erase lmdb value",
weechat_prefix("error"));
return -1;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to close lmdb transaction",
weechat_prefix("error"));
return -1;
};
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++)
{
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)
{
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 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)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
char *device_list = NULL;
MDB_txn *transaction;
MDB_val k_sender_key = {
.mv_data = NULL,
.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),
};
MDB_val v_sender_key = {.mv_data = record, .mv_size = record_len};
MDB_val k_user = {
.mv_data = NULL,
.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),
};
MDB_val v_user = {.mv_data = user_record, .mv_size = user_record_len};
MDB_val k_device_ids = {
.mv_data = NULL,
.mv_size = strlen("device_ids_") + strlen(sender_key_name->sender.name),
};
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(k_sender_key.mv_data, k_sender_key.mv_size,
"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(k_user.mv_data, k_user.mv_size,
"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(k_device_ids.mv_data, k_device_ids.mv_size,
"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->db->dbi_omemo,
&k_device_ids, &v_device_ids))
{
char **argv;
int argc, i;
argv = weechat_string_split(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(v_device_ids.mv_data) + 1 + 10 + 1;
device_list = 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 = 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->db->dbi_omemo,
&k_sender_key, &v_sender_key, 0)/* ||
mdb_put(transaction, omemo->db->dbi_omemo,
&k_user, &v_user, 0)*/ ||
mdb_put(transaction, omemo->db->dbi_omemo,
&k_device_ids, &v_device_ids, 0)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb value",
weechat_prefix("error"));
free(device_list);
return -1;
};
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to write lmdb transaction",
weechat_prefix("error"));
free(device_list);
return -1;
};
free(device_list);
return 0;
}
int sks_load_sender_key(signal_buffer **record, signal_buffer **user_record, const signal_protocol_sender_key_name *sender_key_name, void *user_data)
{
struct t_omemo *omemo = (struct t_omemo *)user_data;
MDB_txn *transaction;
MDB_val k_sender_key = {
.mv_data = NULL,
.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),
};
MDB_val v_sender_key;
MDB_val k_user = {
.mv_data = NULL,
.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),
};
MDB_val v_user;
k_sender_key.mv_data = malloc(sizeof(char) * (
k_sender_key.mv_size + 1));
k_sender_key.mv_size =
snprintf(k_sender_key.mv_data, k_sender_key.mv_size,
"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(k_user.mv_data, k_user.mv_size,
"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"));
}
if (mdb_get(transaction, omemo->db->dbi_omemo,
&k_sender_key, &v_sender_key)/* &&
mdb_get(transaction, omemo->db->dbi_omemo,
&k_user, &v_user)*/)
{
*record = signal_buffer_create(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"));
return -1;
};
}
else
{
/*
signal_protocol_key_helper_sender_key_list_node *sender_keys_list;
session_sender_key *sender_key = NULL;
signal_protocol_key_helper_generate_sender_keys(
&sender_keys_list, 0, 100, omemo->context);
sender_key = signal_protocol_key_helper_key_list_element(sender_keys_list);
signal_protocol_key_helper_key_list_next(sender_keys_list);
uint32_t id = session_sender_key_get_id(sender_key); (void) id;
session_sender_key_serialize(record, sender_key);
signal_protocol_key_helper_key_list_free(sender_keys_list);
v_sender_key.mv_data = signal_buffer_data(*record);
v_sender_key.mv_size = signal_buffer_len(*record);
if (mdb_put(transaction, omemo->db->dbi_omemo,
&k_sender_key, &v_sender_key, MDB_NOOVERWRITE))
{
weechat_printf(NULL, "%sxmpp: failed to read 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;
}
void sks_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
}
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);
}
xmpp_stanza_t *omemo__get_bundle(xmpp_ctx_t *context, char *from, char *to,
struct t_omemo *omemo)
{
xmpp_stanza_t **children = malloc(sizeof(*children) * (100 + 1));
xmpp_stanza_t *parent = NULL;
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 = 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 = 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);
session_pre_key_destroy((signal_type_base*)signed_pre_key);
char *signed_pre_key_signature = NULL;
base64_encode(keysig, keysig_len, &signed_pre_key_signature);
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 = 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));
children[0] = stanza__iq_pubsub(
context, NULL, children, with_noop("http://jabber.org/protocol/pubsub"));
parent = stanza__iq(
context, NULL, children, NULL, "announce2", from, to, "set");
free(children);
return parent;
}
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
new_omemo->db_path = weechat_string_eval_expression("${weechat_data_dir}/xmpp.omemo.db",
NULL, NULL, NULL);
if (mdb_env_open(new_omemo->db->env, new_omemo->db_path, MDB_NOSUBDIR, 0664) != 0)
{
return;
}
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"));
return;
}
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, "omemo_%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"));
return;
}
if (mdb_txn_commit(transaction)) {
weechat_printf(NULL, "%sxmpp: failed to close lmdb transaction",
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 = 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);
signal_buffer *public_data, *private_data;
iks_get_local_registration_id(new_omemo, &new_omemo->device_id);
if (!iks_get_identity_key_pair(&public_data, &private_data, new_omemo))
{
ec_public_key *public_key = NULL;
ec_private_key *private_key = NULL;
curve_decode_point(&public_key, signal_buffer_data(public_data),
signal_buffer_len(public_data), new_omemo->context);
curve_decode_private_point(&private_key, signal_buffer_data(private_data),
signal_buffer_len(private_data), new_omemo->context);
ratchet_identity_key_pair_create(&new_omemo->identity, public_key, private_key);
}
*omemo = new_omemo;
}
void omemo__handle_devicelist(struct t_omemo *omemo, const char *jid,
xmpp_stanza_t *items)
{
(void) omemo;
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;
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;
//weechat_printf(NULL, "omemo devicelist %s: %s%u",
// jid, weechat_color("yellow"), strtol(device_id, NULL, 10));
}
}
void omemo__handle_bundle(struct t_omemo *omemo, const char *jid,
uint32_t device_id, xmpp_stanza_t *items)
{
(void) omemo;
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;
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$s..IK: %s", -1);
for (xmpp_stanza_t *prekey = xmpp_stanza_get_children(prekeys);
prekey; prekey = xmpp_stanza_get_next(prekey))
{
const char *name = xmpp_stanza_get_name(prekey);
if (weechat_strcasecmp(name, "preKeyPublic") != 0)
continue;
const char *pre_key_id = xmpp_stanza_get_attribute(prekey, "preKeyId");
if (!pre_key_id)
continue;
const char *pre_key = xmpp_stanza_get_text(prekey);
if (!pre_key)
continue;
weechat_string_dyn_concat(format, "\n%3$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);
}
//weechat_printf(NULL, *format, jid, device_id, weechat_color("green"),
// signed_pre_key_id, signed_pre_key,
// key_signature, identity_key);
weechat_string_dyn_free(format, 1);
}
char *omemo__decode(struct t_omemo *omemo, const char *jid,
xmpp_stanza_t *encrypted)
{
uint8_t *key_data = NULL, *iv_data = NULL, *payload_data = NULL;
size_t key_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);
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;
uint32_t id = strtol(key_id, NULL, 10);
if (id != omemo->device_id)
continue;
const char *data = xmpp_stanza_get_text(key);
if (!data)
continue;
key_len = base64_decode(data, strlen(data), &key_data);
// signal decrypt key for id
weechat_string_dyn_concat(format, "\n%2$s..K ", -1);
if (key_prekey)
weechat_string_dyn_concat(format, "*", -1);
weechat_string_dyn_concat(format, key_id, -1);
weechat_string_dyn_concat(format, ": ", -1);
weechat_string_dyn_concat(format, data, -1);
}
xmpp_stanza_t *payload = xmpp_stanza_get_child_by_name(encrypted, "payload");
if (payload)
{
const char *payload__text = xmpp_stanza_get_text(payload);
if (!payload__text) return NULL;
payload_len = base64_decode(payload__text, strlen(payload__text), &payload_data);
weechat_string_dyn_concat(format, "\n%2$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) || key_len <= 16) return NULL;
char *plaintext = NULL; size_t plaintext_len = 0;
if (aes_decrypt(payload_data, payload_len, key_data, iv_data,
key_data+AES_KEY_SIZE, key_len-AES_KEY_SIZE,
(uint8_t**)&plaintext, &plaintext_len) && plaintext)
{
plaintext[plaintext_len] = '\0';
return plaintext;
}
return NULL;
}
xmpp_stanza_t *omemo__encode(struct t_omemo *omemo, const char *jid,
uint32_t device_id, const char *unencrypted)
{
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 = 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);
signal_buffer *record;
signal_protocol_address address = {
.name = jid, .name_len = strlen(jid), .device_id = device_id};
/*
session_builder *builder;
session_builder_create(&builder, omemo->store_context, &address, omemo->context);
//session_builder_process_pre_key_bundle(builder, pre_key);
session_cipher *cipher;
session_cipher_create(&cipher, omemo->store_context, &address, omemo->context);
ciphertext_message *encrypted_message;
session_cipher_encrypt(cipher, key_and_tag, AES_KEY_SIZE+tag_len, &encrypted_message);
signal_buffer *serialized = ciphertext_message_get_serialized(encrypted_message);
int prekey = ciphertext_message_get_type(encrypted_message) == CIPHERTEXT_PREKEY_TYPE
? 1 : 0;
char *payload = NULL;
base64_encode(signal_buffer_data(serialized), signal_buffer_len(serialized),
&payload);
weechat_printf(NULL, "signal send %s/%u: %s%s\n..%sMessage: %s",
jid, device_id, weechat_color("blue"), key64,
prekey ? "PreKey" : "", payload);
signal_buffer_free(serialized);
SIGNAL_UNREF(encrypted_message);
session_cipher_free(cipher);
session_builder_free(builder);
*/
free(key_and_tag);
// ...
weechat_printf(NULL, "omemo send %s/%u: %s%s\n..Key: %s\n..IV: %s\n..Payload: %s",
jid, device_id, weechat_color("blue"), unencrypted,
key64, iv64, ciphertext64);
free(iv64);
free(key64);
free(ciphertext64);
return NULL;
}
void omemo__free(struct t_omemo *omemo)
{
if (omemo)
{
if (omemo->context) {
signal_context_destroy(omemo->context);
signal_protocol_store_context_destroy(omemo->store_context);
}
if (omemo->identity)
ratchet_identity_key_pair_destroy(
(signal_type_base *)omemo->identity);
free(omemo->db_path);
free(omemo);
}
}
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