diff options
Diffstat (limited to 'src/core/hle/service')
-rw-r--r-- | src/core/hle/service/ssl_c.cpp | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/core/hle/service/ssl_c.cpp b/src/core/hle/service/ssl_c.cpp index e634276fc..cabd18c80 100644 --- a/src/core/hle/service/ssl_c.cpp +++ b/src/core/hle/service/ssl_c.cpp @@ -2,6 +2,8 @@ // Licensed under GPLv2 or any later version // Refer to the license.txt file included. +#include <random> + #include "core/hle/hle.h" #include "core/hle/service/ssl_c.h" @@ -10,9 +12,58 @@ namespace SSL_C { +// TODO: Implement a proper CSPRNG in the future when actual security is needed +static std::mt19937 rand_gen; + +static void Initialize(Service::Interface* self) { + u32* cmd_buff = Kernel::GetCommandBuffer(); + + // Seed random number generator when the SSL service is initialized + std::random_device rand_device; + rand_gen.seed(rand_device()); + + // Stub, return success + cmd_buff[1] = RESULT_SUCCESS.raw; +} + +static void GenerateRandomData(Service::Interface* self) { + u32* cmd_buff = Kernel::GetCommandBuffer(); + + u32 size = cmd_buff[1]; + VAddr address = cmd_buff[3]; + u8* output_buff = Memory::GetPointer(address); + + // Fill the output buffer with random data. + u32 data = 0; + u32 i = 0; + while (i < size) { + if ((i % 4) == 0) { + // The random number generator returns 4 bytes worth of data, so generate new random data when i == 0 and when i is divisible by 4 + data = rand_gen(); + } + + if (size > 4) { + // Use up the entire 4 bytes of the random data for as long as possible + *(u32*)(output_buff + i) = data; + i += 4; + } else if (size == 2) { + *(u16*)(output_buff + i) = (u16)(data & 0xffff); + i += 2; + } else { + *(u8*)(output_buff + i) = (u8)(data & 0xff); + i++; + } + } + + // Stub, return success + cmd_buff[1] = RESULT_SUCCESS.raw; +} + const Interface::FunctionInfo FunctionTable[] = { + {0x00010002, Initialize, "Initialize"}, {0x000200C2, nullptr, "CreateContext"}, {0x00050082, nullptr, "AddTrustedRootCA"}, + {0x00110042, GenerateRandomData, "GenerateRandomData"}, {0x00150082, nullptr, "Read"}, {0x00170082, nullptr, "Write"}, }; |