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authorbunnei <bunneidev@gmail.com>2018-11-14 20:52:27 +0100
committerGitHub <noreply@github.com>2018-11-14 20:52:27 +0100
commite1ea8cc7214be591067959a3697ed53e95007ac2 (patch)
tree8f4fc978a5799fc729522377fd7a85ccf51b91c2 /src/core/hle/kernel
parentMerge pull request #1662 from FreddyFunk/CopySurface-Optimization (diff)
parentsvc: Use proper random entropy generation algorithm (diff)
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Diffstat (limited to 'src/core/hle/kernel')
-rw-r--r--src/core/hle/kernel/process.cpp6
-rw-r--r--src/core/hle/kernel/process.h11
-rw-r--r--src/core/hle/kernel/svc.cpp11
3 files changed, 27 insertions, 1 deletions
diff --git a/src/core/hle/kernel/process.cpp b/src/core/hle/kernel/process.cpp
index e78e3a950..f06b6bb55 100644
--- a/src/core/hle/kernel/process.cpp
+++ b/src/core/hle/kernel/process.cpp
@@ -15,6 +15,7 @@
#include "core/hle/kernel/thread.h"
#include "core/hle/kernel/vm_manager.h"
#include "core/memory.h"
+#include "core/settings.h"
namespace Kernel {
@@ -33,6 +34,11 @@ SharedPtr<Process> Process::Create(KernelCore& kernel, std::string&& name) {
process->process_id = kernel.CreateNewProcessID();
process->svc_access_mask.set();
+ std::mt19937 rng(Settings::values.rng_seed.value_or(0));
+ std::uniform_int_distribution<u64> distribution;
+ std::generate(process->random_entropy.begin(), process->random_entropy.end(),
+ [&] { return distribution(rng); });
+
kernel.AppendNewProcess(process);
return process;
}
diff --git a/src/core/hle/kernel/process.h b/src/core/hle/kernel/process.h
index f79f6d7a5..cf48787ce 100644
--- a/src/core/hle/kernel/process.h
+++ b/src/core/hle/kernel/process.h
@@ -8,6 +8,7 @@
#include <bitset>
#include <cstddef>
#include <memory>
+#include <random>
#include <string>
#include <vector>
#include <boost/container/static_vector.hpp>
@@ -119,6 +120,8 @@ struct CodeSet final {
class Process final : public Object {
public:
+ static constexpr std::size_t RANDOM_ENTROPY_SIZE = 4;
+
static SharedPtr<Process> Create(KernelCore& kernel, std::string&& name);
std::string GetTypeName() const override {
@@ -212,6 +215,11 @@ public:
total_process_running_time_ticks += ticks;
}
+ /// Gets 8 bytes of random data for svcGetInfo RandomEntropy
+ u64 GetRandomEntropy(std::size_t index) const {
+ return random_entropy.at(index);
+ }
+
/**
* Loads process-specifics configuration info with metadata provided
* by an executable.
@@ -310,6 +318,9 @@ private:
/// Per-process handle table for storing created object handles in.
HandleTable handle_table;
+ /// Random values for svcGetInfo RandomEntropy
+ std::array<u64, RANDOM_ENTROPY_SIZE> random_entropy;
+
std::string name;
};
diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp
index 0bfe1e3be..b0b6508d9 100644
--- a/src/core/hle/kernel/svc.cpp
+++ b/src/core/hle/kernel/svc.cpp
@@ -559,7 +559,16 @@ static ResultCode GetInfo(u64* result, u64 info_id, u64 handle, u64 info_sub_id)
*result = 0;
break;
case GetInfoType::RandomEntropy:
- *result = Settings::values.rng_seed.value_or(0);
+ if (handle != 0) {
+ return ERR_INVALID_HANDLE;
+ }
+
+ if (info_sub_id >= Process::RANDOM_ENTROPY_SIZE) {
+ return ERR_INVALID_COMBINATION_KERNEL;
+ }
+
+ *result = current_process->GetRandomEntropy(info_sub_id);
+ return RESULT_SUCCESS;
break;
case GetInfoType::ASLRRegionBaseAddr:
*result = vm_manager.GetASLRRegionBaseAddress();