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-rw-r--r--lib/libcrypto/rand/rand_win.c99
1 files changed, 55 insertions, 44 deletions
diff --git a/lib/libcrypto/rand/rand_win.c b/lib/libcrypto/rand/rand_win.c
index 30c69161ef8..00dbe4232cc 100644
--- a/lib/libcrypto/rand/rand_win.c
+++ b/lib/libcrypto/rand/rand_win.c
@@ -121,6 +121,10 @@
#include <wincrypt.h>
#include <tlhelp32.h>
+/* Limit the time spent walking through the heap, processes, threads and modules to
+ a maximum of 1000 miliseconds each, unless CryptoGenRandom failed */
+#define MAXDELAY 1000
+
/* Intel hardware RNG CSP -- available from
* http://developer.intel.com/design/security/rng/redist_license.htm
*/
@@ -152,6 +156,7 @@ typedef struct tagCURSORINFO
#define CURSOR_SHOWING 0x00000001
#endif /* CURSOR_SHOWING */
+#if !defined(OPENSSL_SYS_WINCE)
typedef BOOL (WINAPI *CRYPTACQUIRECONTEXTW)(HCRYPTPROV *, LPCWSTR, LPCWSTR,
DWORD, DWORD);
typedef BOOL (WINAPI *CRYPTGENRANDOM)(HCRYPTPROV, DWORD, BYTE *);
@@ -163,7 +168,7 @@ typedef DWORD (WINAPI *GETQUEUESTATUS)(UINT);
typedef HANDLE (WINAPI *CREATETOOLHELP32SNAPSHOT)(DWORD, DWORD);
typedef BOOL (WINAPI *CLOSETOOLHELP32SNAPSHOT)(HANDLE);
-typedef BOOL (WINAPI *HEAP32FIRST)(LPHEAPENTRY32, DWORD, DWORD);
+typedef BOOL (WINAPI *HEAP32FIRST)(LPHEAPENTRY32, DWORD, size_t);
typedef BOOL (WINAPI *HEAP32NEXT)(LPHEAPENTRY32);
typedef BOOL (WINAPI *HEAP32LIST)(HANDLE, LPHEAPLIST32);
typedef BOOL (WINAPI *PROCESS32)(HANDLE, LPPROCESSENTRY32);
@@ -171,9 +176,7 @@ typedef BOOL (WINAPI *THREAD32)(HANDLE, LPTHREADENTRY32);
typedef BOOL (WINAPI *MODULE32)(HANDLE, LPMODULEENTRY32);
#include <lmcons.h>
-#ifndef OPENSSL_SYS_WINCE
#include <lmstats.h>
-#endif
#if 1 /* The NET API is Unicode only. It requires the use of the UNICODE
* macro. When UNICODE is defined LPTSTR becomes LPWSTR. LMSTR was
* was added to the Platform SDK to allow the NET API to be used in
@@ -184,26 +187,14 @@ typedef NET_API_STATUS (NET_API_FUNCTION * NETSTATGET)
(LPWSTR, LPWSTR, DWORD, DWORD, LPBYTE*);
typedef NET_API_STATUS (NET_API_FUNCTION * NETFREE)(LPBYTE);
#endif /* 1 */
+#endif /* !OPENSSL_SYS_WINCE */
int RAND_poll(void)
{
MEMORYSTATUS m;
HCRYPTPROV hProvider = 0;
- BYTE buf[64];
DWORD w;
- HWND h;
-
- HMODULE advapi, kernel, user, netapi;
- CRYPTACQUIRECONTEXTW acquire = 0;
- CRYPTGENRANDOM gen = 0;
- CRYPTRELEASECONTEXT release = 0;
-#if 1 /* There was previously a problem with NETSTATGET. Currently, this
- * section is still experimental, but if all goes well, this conditional
- * will be removed
- */
- NETSTATGET netstatget = 0;
- NETFREE netfree = 0;
-#endif /* 1 */
+ int good = 0;
/* Determine the OS version we are on so we can turn off things
* that do not work properly.
@@ -212,21 +203,24 @@ int RAND_poll(void)
osverinfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO) ;
GetVersionEx( &osverinfo ) ;
-#if defined(OPENSSL_SYS_WINCE) && WCEPLATFORM!=MS_HPC_PRO
-#ifndef CryptAcquireContext
-#define CryptAcquireContext CryptAcquireContextW
-#endif
+#if defined(OPENSSL_SYS_WINCE)
+# if defined(_WIN32_WCE) && _WIN32_WCE>=300
+/* Even though MSDN says _WIN32_WCE>=210, it doesn't seem to be available
+ * in commonly available implementations prior 300... */
+ {
+ BYTE buf[64];
/* poll the CryptoAPI PRNG */
/* The CryptoAPI returns sizeof(buf) bytes of randomness */
- if (CryptAcquireContext(&hProvider, 0, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT))
+ if (CryptAcquireContextW(&hProvider, NULL, NULL, PROV_RSA_FULL,
+ CRYPT_VERIFYCONTEXT))
{
if (CryptGenRandom(hProvider, sizeof(buf), buf))
RAND_add(buf, sizeof(buf), sizeof(buf));
CryptReleaseContext(hProvider, 0);
}
-#endif
-
-#ifndef OPENSSL_SYS_WINCE
+ }
+# endif
+#else /* OPENSSL_SYS_WINCE */
/*
* None of below libraries are present on Windows CE, which is
* why we #ifndef the whole section. This also excuses us from
@@ -240,17 +234,19 @@ int RAND_poll(void)
* implement own shim routine, which would accept ANSI argument
* and expand it to Unicode.
*/
-
+ {
/* load functions dynamically - not available on all systems */
- advapi = LoadLibrary(TEXT("ADVAPI32.DLL"));
- kernel = LoadLibrary(TEXT("KERNEL32.DLL"));
- user = LoadLibrary(TEXT("USER32.DLL"));
- netapi = LoadLibrary(TEXT("NETAPI32.DLL"));
-
-#if 1 /* There was previously a problem with NETSTATGET. Currently, this
- * section is still experimental, but if all goes well, this conditional
- * will be removed
- */
+ HMODULE advapi = LoadLibrary(TEXT("ADVAPI32.DLL"));
+ HMODULE kernel = LoadLibrary(TEXT("KERNEL32.DLL"));
+ HMODULE user = NULL;
+ HMODULE netapi = LoadLibrary(TEXT("NETAPI32.DLL"));
+ CRYPTACQUIRECONTEXTW acquire = NULL;
+ CRYPTGENRANDOM gen = NULL;
+ CRYPTRELEASECONTEXT release = NULL;
+ NETSTATGET netstatget = NULL;
+ NETFREE netfree = NULL;
+ BYTE buf[64];
+
if (netapi)
{
netstatget = (NETSTATGET) GetProcAddress(netapi,"NetStatisticsGet");
@@ -280,7 +276,6 @@ int RAND_poll(void)
if (netapi)
FreeLibrary(netapi);
-#endif /* 1 */
/* It appears like this can cause an exception deep within ADVAPI32.DLL
* at random times on Windows 2000. Reported by Jeffrey Altman.
@@ -356,12 +351,13 @@ int RAND_poll(void)
{
/* poll the CryptoAPI PRNG */
/* The CryptoAPI returns sizeof(buf) bytes of randomness */
- if (acquire(&hProvider, 0, 0, PROV_RSA_FULL,
+ if (acquire(&hProvider, NULL, NULL, PROV_RSA_FULL,
CRYPT_VERIFYCONTEXT))
{
if (gen(hProvider, sizeof(buf), buf) != 0)
{
RAND_add(buf, sizeof(buf), 0);
+ good = 1;
#if 0
printf("randomness from PROV_RSA_FULL\n");
#endif
@@ -375,6 +371,7 @@ int RAND_poll(void)
if (gen(hProvider, sizeof(buf), buf) != 0)
{
RAND_add(buf, sizeof(buf), sizeof(buf));
+ good = 1;
#if 0
printf("randomness from PROV_INTEL_SEC\n");
#endif
@@ -386,7 +383,9 @@ int RAND_poll(void)
if (advapi)
FreeLibrary(advapi);
- if (user)
+ if ((osverinfo.dwPlatformId != VER_PLATFORM_WIN32_NT ||
+ !OPENSSL_isservice()) &&
+ (user = LoadLibrary(TEXT("USER32.DLL"))))
{
GETCURSORINFO cursor;
GETFOREGROUNDWINDOW win;
@@ -399,7 +398,7 @@ int RAND_poll(void)
if (win)
{
/* window handle */
- h = win();
+ HWND h = win();
RAND_add(&h, sizeof(h), 0);
}
if (cursor)
@@ -464,6 +463,7 @@ int RAND_poll(void)
PROCESSENTRY32 p;
THREADENTRY32 t;
MODULEENTRY32 m;
+ DWORD stoptime = 0;
snap = (CREATETOOLHELP32SNAPSHOT)
GetProcAddress(kernel, "CreateToolhelp32Snapshot");
@@ -495,6 +495,7 @@ int RAND_poll(void)
* of entropy.
*/
hlist.dwSize = sizeof(HEAPLIST32);
+ if (good) stoptime = GetTickCount() + MAXDELAY;
if (heaplist_first(handle, &hlist))
do
{
@@ -512,18 +513,20 @@ int RAND_poll(void)
&& --entrycnt > 0);
}
} while (heaplist_next(handle,
- &hlist));
-
+ &hlist) && GetTickCount() < stoptime);
+
/* process walking */
/* PROCESSENTRY32 contains 9 fields that will change
* with each entry. Consider each field a source of
* 1 byte of entropy.
*/
p.dwSize = sizeof(PROCESSENTRY32);
+
+ if (good) stoptime = GetTickCount() + MAXDELAY;
if (process_first(handle, &p))
do
RAND_add(&p, p.dwSize, 9);
- while (process_next(handle, &p));
+ while (process_next(handle, &p) && GetTickCount() < stoptime);
/* thread walking */
/* THREADENTRY32 contains 6 fields that will change
@@ -531,10 +534,11 @@ int RAND_poll(void)
* 1 byte of entropy.
*/
t.dwSize = sizeof(THREADENTRY32);
+ if (good) stoptime = GetTickCount() + MAXDELAY;
if (thread_first(handle, &t))
do
RAND_add(&t, t.dwSize, 6);
- while (thread_next(handle, &t));
+ while (thread_next(handle, &t) && GetTickCount() < stoptime);
/* module walking */
/* MODULEENTRY32 contains 9 fields that will change
@@ -542,18 +546,22 @@ int RAND_poll(void)
* 1 byte of entropy.
*/
m.dwSize = sizeof(MODULEENTRY32);
+ if (good) stoptime = GetTickCount() + MAXDELAY;
if (module_first(handle, &m))
do
RAND_add(&m, m.dwSize, 9);
- while (module_next(handle, &m));
+ while (module_next(handle, &m)
+ && (GetTickCount() < stoptime));
if (close_snap)
close_snap(handle);
else
CloseHandle(handle);
+
}
FreeLibrary(kernel);
}
+ }
#endif /* !OPENSSL_SYS_WINCE */
/* timer data */
@@ -693,6 +701,9 @@ static void readscreen(void)
int y; /* y-coordinate of screen lines to grab */
int n = 16; /* number of screen lines to grab at a time */
+ if (GetVersion() >= 0x80000000 || !OPENSSL_isservice())
+ return;
+
/* Create a screen DC and a memory DC compatible to screen DC */
hScrDC = CreateDC(TEXT("DISPLAY"), NULL, NULL, NULL);
hMemDC = CreateCompatibleDC(hScrDC);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.