char *config_read_encrypted_string(const char *name, unsigned const char key[KDF_HASH_LEN])
{
_cleanup_free_ char *buffer = NULL;
size_t len = config_read_encrypted_buffer(name, (unsigned char **) &buffer, key);
if (!buffer)
return NULL;
return xstrndup(buffer, len);
}
struct session *sesssion_load(unsigned const char key[KDF_HASH_LEN])
{
struct session *session = session_new();
session->uid = config_read_encrypted_string("session_uid", key);
session->sessionid = config_read_encrypted_string("session_sessionid", key);
session->token = config_read_encrypted_string("session_token", key);
session->private_key.len = config_read_encrypted_buffer("session_privatekey", &session->private_key.key, key);
mlock(session->private_key.key, session->private_key.len);
if (session_is_valid(session))
return session;
else {
session_free(session);
return NULL;
}
}
static void write_share_chunk(struct buffer *buffer, struct share *share)
{
struct buffer sharebuf = { .bytes = share->chunk, .len = share->chunk_len, .max = share->chunk_len };
write_chunk(buffer, &sharebuf, "SHAR");
}
size_t blob_write(const struct blob *blob, const unsigned char key[KDF_HASH_LEN], char **out)
{
struct buffer buffer;
struct share *last_share = NULL;
_cleanup_free_ char *version;
memset(&buffer, 0, sizeof(buffer));
version = xultostr(blob->version);
buffer_append(&buffer, "LPAV", 4);
write_plain_string(&buffer, version);
buffer_append(&buffer, "LOCL", 4);
write_plain_string(&buffer, LASTPASS_CLI_VERSION);
for (struct account *account = blob->account_head; account; account = account->next) {
if (!account->share)
write_account_chunk(&buffer, account, key);
}
for (struct account *account = blob->account_head; account; account = account->next) {
if (!account->share)
continue;
if (last_share != account->share) {
write_share_chunk(&buffer, account->share);
last_share = account->share;
}
write_account_chunk(&buffer, account, account->share->key);
}
*out = buffer.bytes;
return buffer.len;
}
static struct blob *local_blob(const unsigned char key[KDF_HASH_LEN], const struct private_key *private_key)
{
_cleanup_free_ char *blob = NULL;
size_t len = config_read_encrypted_buffer("blob", &blob, key);
if (!blob)
return NULL;
return blob_parse(blob, len, key, private_key);
}