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#include "io.h"
#include <util/generic/singleton.h>
#include <util/generic/yexception.h>
#include <util/system/compiler.h>
#include <util/system/yassert.h>
namespace {
using NOpenSSL::TAbstractIO;
TAbstractIO* IO(BIO* bio) noexcept {
void* ptr = BIO_get_data(bio);
Y_VERIFY(ptr);
return static_cast<TAbstractIO*>(ptr);
}
template<class T, class Callable, class... Args>
T ExceptionBoundary(BIO* bio, Callable&& f, T err, Args&&... args) noexcept {
try {
return (IO(bio)->*f)(args...);
} catch (...) {
return err;
}
}
int Write(BIO* bio, const char* data, int dlen) noexcept {
return ExceptionBoundary(bio, &TAbstractIO::WriteOld, -1, data, dlen);
}
int Read(BIO* bio, char* data, int dlen) noexcept {
return ExceptionBoundary(bio, &TAbstractIO::ReadOld, -1, data, dlen);
}
int Puts(BIO* bio, const char* buf) noexcept {
return ExceptionBoundary(bio, &TAbstractIO::Puts, -1, buf);
}
int Gets(BIO* bio, char* buf, int size) noexcept {
return ExceptionBoundary(bio, &TAbstractIO::Gets, -1, buf, size);
}
long Ctrl(BIO* bio, int cmd, long larg, void* parg) noexcept {
return ExceptionBoundary(bio, &TAbstractIO::Ctrl, -1, cmd, larg, parg);
}
int Create(BIO* bio) noexcept {
BIO_set_data(bio, nullptr);
BIO_set_init(bio, 1);
return 1;
}
int Destroy(BIO* bio) noexcept {
BIO_set_data(bio, nullptr);
BIO_set_init(bio, 0);
return 1;
}
NOpenSSL::TBioMethod* Method() {
return SingletonWithPriority<NOpenSSL::TBioMethod, 32768>(
BIO_get_new_index() | BIO_TYPE_SOURCE_SINK,
"AbstractIO",
Write,
Read,
Puts,
Gets,
Ctrl,
Create,
Destroy,
nullptr
);
}
}
namespace NOpenSSL {
TAbstractIO::TAbstractIO()
: Bio(BIO_new(*Method())) {
if (Y_UNLIKELY(!Bio)) {
throw std::bad_alloc();
}
BIO_set_data(Bio, this);
}
TAbstractIO::~TAbstractIO() {
BIO_free(Bio);
}
int TAbstractIO::WriteOld(const char* data, int dlen) {
size_t written = 0;
int ret = Write(data, dlen, &written);
if (ret <= 0) {
return ret;
}
return written;
}
int TAbstractIO::ReadOld(char* data, int dlen) {
size_t readbytes = 0;
int ret = Read(data, dlen, &readbytes);
if (ret <= 0) {
return ret;
}
return readbytes;
}
long TAbstractIO::Ctrl(int cmd, long larg, void* parg) {
Y_UNUSED(larg);
Y_UNUSED(parg);
if (cmd == BIO_CTRL_FLUSH) {
Flush();
return 1;
}
return 0;
}
} // namespace NOpenSSL
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