QPDFCryptoProvider.cc
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#include <qpdf/QPDFCryptoProvider.hh>
#include <qpdf/QUtil.hh>
#include <qpdf/qpdf-config.h>
#include <stdexcept>
#ifdef USE_CRYPTO_NATIVE
# include <qpdf/QPDFCrypto_native.hh>
#endif
#ifdef USE_CRYPTO_GNUTLS
# include <qpdf/QPDFCrypto_gnutls.hh>
#endif
#ifdef USE_CRYPTO_OPENSSL
# include <qpdf/QPDFCrypto_openssl.hh>
#endif
std::shared_ptr<QPDFCryptoImpl>
QPDFCryptoProvider::getImpl()
{
QPDFCryptoProvider& p = getInstance();
if (p.m->default_provider.empty()) {
throw std::logic_error("QPDFCryptoProvider::getImpl called with no default provider.");
}
return p.getImpl_internal(p.m->default_provider);
}
std::shared_ptr<QPDFCryptoImpl>
QPDFCryptoProvider::getImpl(std::string const& name)
{
return getInstance().getImpl_internal(name);
}
void
QPDFCryptoProvider::registerImpl(std::string const& name, provider_fn f)
{
getInstance().registerImpl_internal(name, std::move(f));
}
void
QPDFCryptoProvider::setDefaultProvider(std::string const& name)
{
getInstance().setDefaultProvider_internal(name);
}
QPDFCryptoProvider::QPDFCryptoProvider() :
m(std::make_shared<Members>())
{
#ifdef USE_CRYPTO_NATIVE
registerImpl_internal("native", std::make_shared<QPDFCrypto_native>);
#endif
#ifdef USE_CRYPTO_GNUTLS
registerImpl_internal("gnutls", std::make_shared<QPDFCrypto_gnutls>);
#endif
#ifdef USE_CRYPTO_OPENSSL
registerImpl_internal("openssl", std::make_shared<QPDFCrypto_openssl>);
#endif
std::string default_crypto;
if (!QUtil::get_env("QPDF_CRYPTO_PROVIDER", &default_crypto)) {
default_crypto = DEFAULT_CRYPTO;
}
setDefaultProvider_internal(default_crypto);
}
QPDFCryptoProvider&
QPDFCryptoProvider::getInstance()
{
static QPDFCryptoProvider instance;
return instance;
}
std::shared_ptr<QPDFCryptoImpl>
QPDFCryptoProvider::getImpl_internal(std::string const& name) const
{
auto iter = m->providers.find(name);
if (iter == m->providers.end()) {
throw std::logic_error(
"QPDFCryptoProvider requested unknown implementation \"" + name + "\"");
}
return m->providers[name]();
}
void
QPDFCryptoProvider::registerImpl_internal(std::string const& name, provider_fn f)
{
m->providers[name] = std::move(f);
}
void
QPDFCryptoProvider::setDefaultProvider_internal(std::string const& name)
{
if (!m->providers.contains(name)) {
throw std::logic_error(
"QPDFCryptoProvider: request to set default provider to unknown implementation \"" +
name + "\"");
}
m->default_provider = name;
}
std::set<std::string>
QPDFCryptoProvider::getRegisteredImpls()
{
std::set<std::string> result;
QPDFCryptoProvider& p = getInstance();
for (auto const& iter: p.m->providers) {
result.insert(iter.first);
}
return result;
}
std::string
QPDFCryptoProvider::getDefaultProvider()
{
return getInstance().m->default_provider;
}