From 8b472324e4ce32c4df84bbc7d6eb0866d38ccac7 Mon Sep 17 00:00:00 2001
From: Sui <bygreencn@gmail.com>
Date: Mon, 15 Dec 2014 15:57:57 +0800
Subject: [PATCH] fix issue of SystemFunction036 not found at advapi32 when
 build libsodium .

---
 .../randombytes/salsa20/randombytes_salsa20_random.c      | 8 ++++++++
 .../randombytes/sysrandom/randombytes_sysrandom.c         | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/libsodium/src/libsodium/randombytes/salsa20/randombytes_salsa20_random.c b/libsodium/src/libsodium/randombytes/salsa20/randombytes_salsa20_random.c
index cb7f9e2f..ab44553f 100644
--- a/libsodium/src/libsodium/randombytes/salsa20/randombytes_salsa20_random.c
+++ b/libsodium/src/libsodium/randombytes/salsa20/randombytes_salsa20_random.c
@@ -30,9 +30,13 @@
 # if defined(__cplusplus)
 extern "C"
 # endif
+#if defined(__MINGW32__)
+BOOLEAN (APIENTRY *RtlGenRandom)(PVOID, ULONG);
+#else
 BOOLEAN NTAPI RtlGenRandom(PVOID RandomBuffer, ULONG RandomBufferLength);
 # pragma comment(lib, "advapi32.lib")
 #endif
+#endif
 
 #define SALSA20_RANDOM_BLOCK_SIZE crypto_core_salsa20_OUTPUTBYTES
 #define SHA512_BLOCK_SIZE 128U
@@ -189,6 +193,10 @@ randombytes_salsa20_random_stir(void)
         abort(); /* LCOV_EXCL_LINE */
     }
 #else /* _WIN32 */
+#if defined (__MINGW32__)
+	HMODULE lib = LoadLibraryW (L"advapi32.dll");
+	RtlGenRandom = (BOOLEAN(APIENTRY*)(PVOID,ULONG))GetProcAddress (lib,"SystemFunction036");
+#endif
     if (! RtlGenRandom((PVOID) m0, (ULONG) sizeof m0)) {
         abort(); /* LCOV_EXCL_LINE */
     }
diff --git a/libsodium/src/libsodium/randombytes/sysrandom/randombytes_sysrandom.c b/libsodium/src/libsodium/randombytes/sysrandom/randombytes_sysrandom.c
index 79e910df..af3eb735 100644
--- a/libsodium/src/libsodium/randombytes/sysrandom/randombytes_sysrandom.c
+++ b/libsodium/src/libsodium/randombytes/sysrandom/randombytes_sysrandom.c
@@ -26,9 +26,13 @@
 # if defined(__cplusplus)
 extern "C"
 # endif
+#if defined(__MINGW32__)
+BOOLEAN (APIENTRY *RtlGenRandom)(PVOID, ULONG);
+#else
 BOOLEAN NTAPI RtlGenRandom(PVOID RandomBuffer, ULONG RandomBufferLength);
 # pragma comment(lib, "advapi32.lib")
 #endif
+#endif
 
 #ifdef __OpenBSD__
 
@@ -211,6 +215,10 @@ randombytes_sysrandom_buf(void * const buf, const size_t size)
     if (size > (size_t) 0xffffffff) {
         abort(); /* LCOV_EXCL_LINE */
     }
+#if defined (__MINGW32__)
+	HMODULE lib = LoadLibraryW (L"advapi32.dll");
+	RtlGenRandom = (BOOLEAN(APIENTRY*)(PVOID,ULONG))GetProcAddress (lib,"SystemFunction036");
+#endif
     if (! RtlGenRandom((PVOID) buf, (ULONG) size)) {
         abort(); /* LCOV_EXCL_LINE */
     }