Openssl 1.1.0h

2018-04-02 22:33:38 +09:00
commit 1fd4faa81c
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+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include "internal/cryptlib.h"
+#include <openssl/rand.h>
+#include "rand_lcl.h"
+
+#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
+# include <windows.h>
+/* On Windows 7 or higher use BCrypt instead of the legacy CryptoAPI */
+# if defined(_MSC_VER) && defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0601
+#  define RAND_WINDOWS_USE_BCRYPT
+# endif
+
+# ifdef RAND_WINDOWS_USE_BCRYPT
+#  include <bcrypt.h>
+#  pragma comment(lib, "bcrypt.lib")
+#  ifndef STATUS_SUCCESS
+#   define STATUS_SUCCESS ((NTSTATUS)0x00000000L)
+#  endif
+# else
+#  include <wincrypt.h>
+/*
+ * Intel hardware RNG CSP -- available from
+ * http://developer.intel.com/design/security/rng/redist_license.htm
+ */
+#  define PROV_INTEL_SEC 22
+#  define INTEL_DEF_PROV L"Intel Hardware Cryptographic Service Provider"
+# endif
+
+static void readtimer(void);
+
+int RAND_poll(void)
+{
+    MEMORYSTATUS mst;
+# ifndef RAND_WINDOWS_USE_BCRYPT
+    HCRYPTPROV hProvider;
+# endif
+    DWORD w;
+    BYTE buf[64];
+
+# ifdef RAND_WINDOWS_USE_BCRYPT
+    if (BCryptGenRandom(NULL, buf, (ULONG)sizeof(buf), BCRYPT_USE_SYSTEM_PREFERRED_RNG) == STATUS_SUCCESS) {
+        RAND_add(buf, sizeof(buf), sizeof(buf));
+    }
+# else
+    /* poll the CryptoAPI PRNG */
+    /* The CryptoAPI returns sizeof(buf) bytes of randomness */
+    if (CryptAcquireContextW(&hProvider, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) {
+        if (CryptGenRandom(hProvider, (DWORD)sizeof(buf), buf) != 0) {
+            RAND_add(buf, sizeof(buf), sizeof(buf));
+        }
+        CryptReleaseContext(hProvider, 0);
+    }
+
+    /* poll the Pentium PRG with CryptoAPI */
+    if (CryptAcquireContextW(&hProvider, NULL, INTEL_DEF_PROV, PROV_INTEL_SEC, CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) {
+        if (CryptGenRandom(hProvider, (DWORD)sizeof(buf), buf) != 0) {
+            RAND_add(buf, sizeof(buf), sizeof(buf));
+        }
+        CryptReleaseContext(hProvider, 0);
+    }
+# endif
+
+    /* timer data */
+    readtimer();
+
+    /* memory usage statistics */
+    GlobalMemoryStatus(&mst);
+    RAND_add(&mst, sizeof(mst), 1);
+
+    /* process ID */
+    w = GetCurrentProcessId();
+    RAND_add(&w, sizeof(w), 1);
+
+    return (1);
+}
+
+#if OPENSSL_API_COMPAT < 0x10100000L
+int RAND_event(UINT iMsg, WPARAM wParam, LPARAM lParam)
+{
+    RAND_poll();
+    return RAND_status();
+}
+
+void RAND_screen(void)
+{
+    RAND_poll();
+}
+#endif
+
+/* feed timing information to the PRNG */
+static void readtimer(void)
+{
+    DWORD w;
+    LARGE_INTEGER l;
+    static int have_perfc = 1;
+# if defined(_MSC_VER) && defined(_M_X86)
+    static int have_tsc = 1;
+    DWORD cyclecount;
+
+    if (have_tsc) {
+        __try {
+            __asm {
+            _emit 0x0f _emit 0x31 mov cyclecount, eax}
+            RAND_add(&cyclecount, sizeof(cyclecount), 1);
+        }
+        __except(EXCEPTION_EXECUTE_HANDLER) {
+            have_tsc = 0;
+        }
+    }
+# else
+#  define have_tsc 0
+# endif
+
+    if (have_perfc) {
+        if (QueryPerformanceCounter(&l) == 0)
+            have_perfc = 0;
+        else
+            RAND_add(&l, sizeof(l), 0);
+    }
+
+    if (!have_tsc && !have_perfc) {
+        w = GetTickCount();
+        RAND_add(&w, sizeof(w), 0);
+    }
+}
+
+#endif