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Decrypt application

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This commit is contained in:
Jakub Melka
2021-05-11 18:46:33 +02:00
parent d607c24459
commit aa059ea1f6
30 changed files with 295 additions and 87 deletions
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27
Pdf4QtLib/sources/pdfsecurityhandler.cpp
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@ -369,7 +369,7 @@ PDFSecurityHandlerPointer PDFSecurityHandler::createSecurityHandler(const PDFObj
if (it == handler.m_cryptFilters.cend())
{
throw PDFException(PDFTranslationContext::tr("Uknown crypt filter '%1'.").arg(QString::fromLatin1(name)));
throw PDFException(PDFTranslationContext::tr("Unknown crypt filter '%1'.").arg(QString::fromLatin1(name)));
}
return it->second;
@ -446,7 +446,7 @@ PDFSecurityHandlerPointer PDFSecurityHandler::createSecurityHandler(const PDFObj
return PDFSecurityHandlerPointer(new PDFStandardSecurityHandler(qMove(handler)));
}
PDFSecurityHandler::AuthorizationResult PDFStandardSecurityHandler::authenticate(const std::function<QString(bool*)>& getPasswordCallback)
PDFSecurityHandler::AuthorizationResult PDFStandardSecurityHandler::authenticate(const std::function<QString(bool*)>& getPasswordCallback, bool authorizeOwnerOnly)
{
QByteArray password;
bool passwordObtained = true;
@ -478,15 +478,18 @@ PDFSecurityHandler::AuthorizationResult PDFStandardSecurityHandler::authenticate
}
// Try to authorize user password
QByteArray fileEncryptionKey = createFileEncryptionKey(password);
QByteArray U = createEntryValueU_r234(fileEncryptionKey);
if (U == m_U)
if (!authorizeOwnerOnly)
{
// We have authorized owner access
m_authorizationData.authorizationResult = AuthorizationResult::UserAuthorized;
m_authorizationData.fileEncryptionKey = fileEncryptionKey;
return AuthorizationResult::UserAuthorized;
QByteArray fileEncryptionKey = createFileEncryptionKey(password);
QByteArray U = createEntryValueU_r234(fileEncryptionKey);
if (U == m_U)
{
// We have authorized user access
m_authorizationData.authorizationResult = AuthorizationResult::UserAuthorized;
m_authorizationData.fileEncryptionKey = fileEncryptionKey;
return AuthorizationResult::UserAuthorized;
}
}
break;
@ -534,7 +537,7 @@ PDFSecurityHandler::AuthorizationResult PDFStandardSecurityHandler::authenticate
}
// Try to authorize user password
if (!m_authorizationData.isAuthorized())
if (!m_authorizationData.isAuthorized() && !authorizeOwnerOnly)
{
QByteArray inputData = password + userData.validationSalt;
QByteArray hash = createHash_r56(inputData, password, false);
@ -925,7 +928,7 @@ QByteArray PDFStandardSecurityHandler::createUserPasswordFromOwnerPassword(const
const int keyByteLength = m_keyLength / 8;
if (keyByteLength > MD5_DIGEST_LENGTH)
{
throw PDFException(PDFTranslationContext::tr("Encryption key length (%1) exceeded maximal value of.").arg(keyByteLength).arg(MD5_DIGEST_LENGTH));
throw PDFException(PDFTranslationContext::tr("Encryption key length (%1) exceeded maximal value of %2.").arg(keyByteLength).arg(MD5_DIGEST_LENGTH));
}
if (m_R >= 3)