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/*
Copyright (C) 2024 Selwin van Dijk
This file is part of signalbackup-tools.
signalbackup-tools is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
signalbackup-tools is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with signalbackup-tools. If not, see <https://www.gnu.org/licenses/>.
*/
#include "signalbackup.ih"
#include <openssl/sha.h>
void SignalBackup::dtImportLongText(std::string const &msgbody_full, long long int new_mms_id, long long int uniqueid)
{
if (d_verbose) [[unlikely]] Logger::message_start("Insert LONG_TEXT attachment...");
// gethash
std::string hash;
unsigned char rawhash[SHA256_DIGEST_LENGTH];
bool fail = true;
std::unique_ptr<EVP_MD_CTX, decltype(&::EVP_MD_CTX_free)> sha256(EVP_MD_CTX_new(), &::EVP_MD_CTX_free);
if (sha256.get() && EVP_DigestInit_ex(sha256.get(), EVP_sha256(), nullptr) == 1)
{
fail = false;
if (EVP_DigestUpdate(sha256.get(), msgbody_full.c_str(), msgbody_full.length()) != 1)
fail = true;
fail |= (EVP_DigestFinal_ex(sha256.get(), rawhash, nullptr) != 1);
}
hash = fail ? std::string() : Base64::bytesToBase64String(rawhash, SHA256_DIGEST_LENGTH);
std::string filename = bepaald::toDateString(uniqueid / 1000, "signal-%Y-%m-%d-%H%M%S.txt");
//std::cout << "SIZE: " << msgbody_full.length() << std::endl;
//std::cout << "HASH: " << hash << std::endl;
//std::cout << "FILENAME: " << filename << std::endl;
std::any new_part_id_ret;
if (!insertRow(d_part_table,
{{d_part_mid, new_mms_id},
{d_part_ct, "text/x-signal-plain"},
{d_part_pending, 0},
{"data_size", msgbody_full.length()},
{(d_database.tableContainsColumn(d_part_table, "unique_id") ? "unique_id" : ""), uniqueid},
{(d_database.tableContainsColumn(d_part_table, "data_hash") ? "data_hash" : ""), hash},
{(d_database.tableContainsColumn(d_part_table, "data_hash_start") ? "data_hash_start" : ""), hash},
{(d_database.tableContainsColumn(d_part_table, "data_hash_end") ? "data_hash_end" : ""), hash},
{"upload_timestamp", uniqueid},
//{"cdn_number", results_attachment_data.value(0, "cdn_number")}, // will be 0 on sticker, usually 0 or 2, but I dont know what it means
{"file_name", filename}},
"_id", &new_part_id_ret))
Logger::error("Failed to set LONG_TEXT attachment");
else // set actual attachment data
{
long long int new_part_id = std::any_cast<long long int>(new_part_id_ret);
DeepCopyingUniquePtr<AttachmentFrame> new_attachment_frame;
if (setFrameFromStrings(&new_attachment_frame,
std::vector<std::string>{"ROWID:uint64:" + bepaald::toString(new_part_id),
(d_database.tableContainsColumn(d_part_table, "unique_id") ? "ATTACHMENTID:uint64:" + bepaald::toString(uniqueid) : ""),
"LENGTH:uint32:" + bepaald::toString(msgbody_full.length())}))
{
new_attachment_frame->setAttachmentDataUnbacked(reinterpret_cast<unsigned char const *>(msgbody_full.c_str()), msgbody_full.length());
d_attachments.emplace(std::make_pair(new_part_id, d_database.tableContainsColumn(d_part_table, "unique_id") ? uniqueid : -1), new_attachment_frame.release());
}
else
{
Logger::error("Failed to create AttachmentFrame for data");
// try to remove the inserted part entry:
d_database.exec("DELETE FROM " + d_part_table + " WHERE _id = ?", new_part_id);
}
}
if (d_verbose) [[unlikely]] Logger::message_end("done");
}
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