#include "il2cpp-config.h"
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#if IL2CPP_TARGET_POSIX && !IL2CPP_TINY_WITHOUT_DEBUGGER
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#include "os/Cryptography.h"
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#ifndef NAME_DEV_URANDOM
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#define NAME_DEV_URANDOM "/dev/urandom"
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#endif
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static int64_t file = -1;
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namespace il2cpp
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{
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namespace os
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{
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void* Cryptography::GetCryptographyProvider()
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{
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return (file < 0) ? NULL : (void*)file;
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}
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bool Cryptography::OpenCryptographyProvider()
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{
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#ifdef NAME_DEV_URANDOM
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file = open(NAME_DEV_URANDOM, O_RDONLY);
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#endif
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#ifdef NAME_DEV_RANDOM
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if (file < 0)
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file = open(NAME_DEV_RANDOM, O_RDONLY);
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#endif
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return true;
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}
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void Cryptography::ReleaseCryptographyProvider(void* provider)
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{
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}
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bool Cryptography::FillBufferWithRandomBytes(void* provider, uint32_t length, unsigned char* data)
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{
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int count = 0;
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ssize_t err;
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// Make sure the provider is correct, or we may end up reading from the wrong file.
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// If provider happens to be 0 we will read from stdin and hang!
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if ((int64_t)provider != file)
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return false;
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do
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{
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err = read((int)(size_t)provider, data + count, length - count);
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if (err < 0)
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{
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if (errno == EINTR)
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continue;
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break;
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}
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count += err;
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}
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while (count < length);
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return err >= 0;
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}
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}
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}
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#endif
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