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// SPDX-FileCopyrightText: 2022 Linus Jahn <lnj@kaidan.im>
// SPDX-FileCopyrightText: 2022 Jonah Brüchert <jbb@kaidan.im>
//
// SPDX-License-Identifier: LGPL-2.1-or-later
#include "QXmppConstants_p.h"
#include "QXmppEncryptedFileSource_p.h"
#include "QXmppHttpFileSource.h"
#include <optional>
#include <QDomElement>
#include <QXmlStreamWriter>
/// \cond
static QString cipherToString(QXmppEncryptedFileSource::Cipher cipher)
{
switch (cipher) {
case QXmppEncryptedFileSource::Aes128GcmNopadding:
return "urn:xmpp:ciphers:aes-128-gcm-nopadding:0";
case QXmppEncryptedFileSource::Aes256GcmNopadding:
return "urn:xmpp:ciphers:aes-256-gcm-nopadding:0";
case QXmppEncryptedFileSource::Aes256CbcPkcs7:
return "urn:xmpp:ciphers:aes-256-cbc-pkcs7:0";
}
Q_UNREACHABLE();
}
static std::optional<QXmppEncryptedFileSource::Cipher> cipherFromString(const QString &cipher)
{
if (cipher == "urn:xmpp:ciphers:aes-128-gcm-nopadding:0") {
return QXmppEncryptedFileSource::Aes128GcmNopadding;
} else if (cipher == "urn:xmpp:ciphers:aes-256-gcm-nopadding:0") {
return QXmppEncryptedFileSource::Aes256GcmNopadding;
} else if (cipher == "urn:xmpp:ciphers:aes-256-cbc-pkcs7:0") {
return QXmppEncryptedFileSource::Aes256CbcPkcs7;
}
return {};
}
QXmppEncryptedFileSource::QXmppEncryptedFileSource() = default;
QXmppEncryptedFileSource::Cipher QXmppEncryptedFileSource::cipher() const
{
return m_cipher;
}
void QXmppEncryptedFileSource::setCipher(Cipher newCipher)
{
m_cipher = newCipher;
}
const QByteArray &QXmppEncryptedFileSource::key() const
{
return m_key;
}
void QXmppEncryptedFileSource::setKey(const QByteArray &newKey)
{
m_key = newKey;
}
const QByteArray &QXmppEncryptedFileSource::iv() const
{
return m_iv;
}
void QXmppEncryptedFileSource::setIv(const QByteArray &newIv)
{
m_iv = newIv;
}
const QVector<QXmppHash> &QXmppEncryptedFileSource::hashes() const
{
return m_hashes;
}
void QXmppEncryptedFileSource::setHashes(const QVector<QXmppHash> &newHashes)
{
m_hashes = newHashes;
}
const QVector<QXmppHttpFileSource> &QXmppEncryptedFileSource::httpSources() const
{
return m_httpSources;
}
void QXmppEncryptedFileSource::setHttpSources(const QVector<QXmppHttpFileSource> &newHttpSources)
{
m_httpSources = newHttpSources;
}
bool QXmppEncryptedFileSource::parse(const QDomElement &el)
{
QString cipher = el.attribute(QStringLiteral("cipher"));
if (auto parsedCipher = cipherFromString(cipher)) {
m_cipher = *parsedCipher;
} else {
return false;
}
auto keyEl = el.firstChildElement(QStringLiteral("key"));
if (keyEl.isNull()) {
return false;
}
m_key = QByteArray::fromBase64(keyEl.text().toUtf8());
auto ivEl = el.firstChildElement(QStringLiteral("iv"));
if (ivEl.isNull()) {
return false;
}
m_iv = QByteArray::fromBase64(ivEl.text().toUtf8());
for (auto childEl = el.firstChildElement(QStringLiteral("hash"));
!childEl.isNull();
childEl = childEl.nextSiblingElement(QStringLiteral("hash"))) {
QXmppHash hash;
if (!hash.parse(childEl)) {
return false;
}
m_hashes.push_back(std::move(hash));
}
auto sourcesEl = el.firstChildElement(QStringLiteral("sources"));
if (sourcesEl.isNull()) {
return false;
}
for (auto childEl = sourcesEl.firstChildElement(QStringLiteral("url-data"));
!childEl.isNull();
childEl = childEl.nextSiblingElement(QStringLiteral("url-data"))) {
QXmppHttpFileSource source;
source.parse(childEl);
m_httpSources.push_back(std::move(source));
}
return true;
}
void QXmppEncryptedFileSource::toXml(QXmlStreamWriter *writer) const
{
writer->writeStartElement(QStringLiteral("encrypted"));
writer->writeDefaultNamespace(ns_esfs);
writer->writeAttribute(QStringLiteral("cipher"), cipherToString(m_cipher));
writer->writeTextElement(QStringLiteral("key"), m_key.toBase64());
writer->writeTextElement(QStringLiteral("iv"), m_iv.toBase64());
for (const auto &hash : m_hashes) {
hash.toXml(writer);
}
writer->writeStartElement(QStringLiteral("sources"));
writer->writeDefaultNamespace(ns_sfs);
for (const auto &source : m_httpSources) {
source.toXml(writer);
}
writer->writeEndElement();
writer->writeEndElement();
}
/// \endcond
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