71 lines
1.5 KiB
C++
71 lines
1.5 KiB
C++
|
#include "il2cpp-config.h"
|
||
|
|
|
||
|
|
#if IL2CPP_TARGET_POSIX && !RUNTIME_TINY && !IL2CPP_USE_PLATFORM_SPECIFIC_CRYPTO
|
||
|
|
|
||
|
|
#include "os/Cryptography.h"
|
||
|
|
#include <errno.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
|
||
|
|
#ifndef NAME_DEV_URANDOM
|
||
|
|
#define NAME_DEV_URANDOM "/dev/urandom"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static int64_t file = -1;
|
||
|
|
|
||
|
|
namespace il2cpp
|
||
|
|
{
|
||
|
|
namespace os
|
||
|
|
{
|
||
|
|
void* Cryptography::GetCryptographyProvider()
|
||
|
|
{
|
||
|
|
return (file < 0) ? NULL : (void*)file;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool Cryptography::OpenCryptographyProvider()
|
||
|
|
{
|
||
|
|
#ifdef NAME_DEV_URANDOM
|
||
|
|
file = open(NAME_DEV_URANDOM, O_RDONLY);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef NAME_DEV_RANDOM
|
||
|
|
if (file < 0)
|
||
|
|
file = open(NAME_DEV_RANDOM, O_RDONLY);
|
||
|
|
#endif
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
void Cryptography::ReleaseCryptographyProvider(void* provider)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
bool Cryptography::FillBufferWithRandomBytes(void* provider, intptr_t length, unsigned char* data)
|
||
|
|
{
|
||
|
|
int count = 0;
|
||
|
|
ssize_t err;
|
||
|
|
|
||
|
|
// Make sure the provider is correct, or we may end up reading from the wrong file.
|
||
|
|
// If provider happens to be 0 we will read from stdin and hang!
|
||
|
|
if ((int64_t)provider != file)
|
||
|
|
return false;
|
||
|
|
|
||
|
|
do
|
||
|
|
{
|
||
|
|
err = read((int)(size_t)provider, data + count, length - count);
|
||
|
|
if (err < 0)
|
||
|
|
{
|
||
|
|
if (errno == EINTR)
|
||
|
|
continue;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
count += err;
|
||
|
|
}
|
||
|
|
while (count < length);
|
||
|
|
|
||
|
|
return err >= 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|