-/* crypto/cryptlib.c */
/* ====================================================================
* Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
*
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
- *
+ *
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
+ *
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
- *
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
+ * 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
+ *
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
- *
+ *
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
*/
/* ====================================================================
* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
- * ECDH support in OpenSSL originally developed by
+ * ECDH support in OpenSSL originally developed by
* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
*/
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
#include <openssl/safestack.h>
-#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
-static double SSLeay_MSVC5_hack=0.0; /* and for VC1.5 */
-#endif
-
-#if defined(__i386) || defined(__i386__) || defined(_M_IX86) || \
- defined(__INTEL__) || \
- defined(__x86_64) || defined(__x86_64__) || defined(_M_AMD64) || defined(_M_X64)
+#if defined(__i386) || defined(__i386__) || defined(_M_IX86) || \
+ defined(__INTEL__) || \
+ defined(__x86_64) || defined(__x86_64__) || \
+ defined(_M_AMD64) || defined(_M_X64)
-extern unsigned int OPENSSL_ia32cap_P[4];
-unsigned int *OPENSSL_ia32cap_loc(void) { return OPENSSL_ia32cap_P; }
+extern unsigned int OPENSSL_ia32cap_P[4];
+unsigned int *OPENSSL_ia32cap_loc(void)
+{
+ return OPENSSL_ia32cap_P;
+}
-#if defined(OPENSSL_CPUID_OBJ) && !defined(OPENSSL_NO_ASM) && !defined(I386_ONLY)
-#define OPENSSL_CPUID_SETUP
-#if defined(_WIN32)
-typedef unsigned __int64 IA32CAP;
-#else
-typedef unsigned long long IA32CAP;
-#endif
+# if defined(OPENSSL_CPUID_OBJ) && !defined(OPENSSL_NO_ASM) && !defined(I386_ONLY)
+#include <stdio.h>
+# define OPENSSL_CPUID_SETUP
+typedef uint64_t IA32CAP;
void OPENSSL_cpuid_setup(void)
-{ static int trigger=0;
- IA32CAP OPENSSL_ia32_cpuid(unsigned int *);
- IA32CAP vec;
- char *env;
-
- if (trigger) return;
-
- trigger=1;
- if ((env=getenv("OPENSSL_ia32cap"))) {
- int off = (env[0]=='~')?1:0;
-#if defined(_WIN32)
- if (!sscanf(env+off,"%I64i",&vec)) vec = strtoul(env+off,NULL,0);
-#else
- if (!sscanf(env+off,"%lli",(long long *)&vec)) vec = strtoul(env+off,NULL,0);
-#endif
- if (off) vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P)&~vec;
- else if (env[0]==':') vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P);
-
- OPENSSL_ia32cap_P[2] = 0;
- if ((env=strchr(env,':'))) {
- unsigned int vecx;
- env++;
- off = (env[0]=='~')?1:0;
- vecx = strtoul(env+off,NULL,0);
- if (off) OPENSSL_ia32cap_P[2] &= ~vecx;
- else OPENSSL_ia32cap_P[2] = vecx;
- }
- }
- else
- vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P);
+{
+ static int trigger = 0;
+ IA32CAP OPENSSL_ia32_cpuid(unsigned int *);
+ IA32CAP vec;
+ char *env;
+
+ if (trigger)
+ return;
+
+ trigger = 1;
+ if ((env = getenv("OPENSSL_ia32cap"))) {
+ int off = (env[0] == '~') ? 1 : 0;
+# if defined(_WIN32)
+ if (!sscanf(env + off, "%I64i", &vec))
+ vec = strtoul(env + off, NULL, 0);
+# else
+ if (!sscanf(env + off, "%lli", (long long *)&vec))
+ vec = strtoul(env + off, NULL, 0);
+# endif
+ if (off)
+ vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P) & ~vec;
+ else if (env[0] == ':')
+ vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P);
+
+ OPENSSL_ia32cap_P[2] = 0;
+ if ((env = strchr(env, ':'))) {
+ unsigned int vecx;
+ env++;
+ off = (env[0] == '~') ? 1 : 0;
+ vecx = strtoul(env + off, NULL, 0);
+ if (off)
+ OPENSSL_ia32cap_P[2] &= ~vecx;
+ else
+ OPENSSL_ia32cap_P[2] = vecx;
+ }
+ } else
+ vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P);
/*
* |(1<<10) sets a reserved bit to signal that variable
* was initialized already... This is to avoid interference
* with cpuid snippets in ELF .init segment.
*/
- OPENSSL_ia32cap_P[0] = (unsigned int)vec|(1<<10);
- OPENSSL_ia32cap_P[1] = (unsigned int)(vec>>32);
+ OPENSSL_ia32cap_P[0] = (unsigned int)vec | (1 << 10);
+ OPENSSL_ia32cap_P[1] = (unsigned int)(vec >> 32);
}
-#else
+# else
unsigned int OPENSSL_ia32cap_P[4];
-#endif
+# endif
#else
-unsigned int *OPENSSL_ia32cap_loc(void) { return NULL; }
+unsigned int *OPENSSL_ia32cap_loc(void)
+{
+ return NULL;
+}
#endif
int OPENSSL_NONPIC_relocated = 0;
#if !defined(OPENSSL_CPUID_SETUP) && !defined(OPENSSL_CPUID_OBJ)
-void OPENSSL_cpuid_setup(void) {}
+void OPENSSL_cpuid_setup(void)
+{
+}
#endif
#if (defined(_WIN32) || defined(__CYGWIN__)) && defined(_WINDLL)
-#ifdef __CYGWIN__
+# ifdef __CYGWIN__
/* pick DLL_[PROCESS|THREAD]_[ATTACH|DETACH] definitions */
-#include <windows.h>
-/* this has side-effect of _WIN32 getting defined, which otherwise
- * is mutually exclusive with __CYGWIN__... */
-#endif
+# include <windows.h>
+/*
+ * this has side-effect of _WIN32 getting defined, which otherwise is
+ * mutually exclusive with __CYGWIN__...
+ */
+# endif
-/* All we really need to do is remove the 'error' state when a thread
- * detaches */
-
-BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason,
- LPVOID lpvReserved)
- {
- switch(fdwReason)
- {
- case DLL_PROCESS_ATTACH:
- OPENSSL_cpuid_setup();
-#if defined(_WIN32_WINNT)
- {
- IMAGE_DOS_HEADER *dos_header = (IMAGE_DOS_HEADER *)hinstDLL;
- IMAGE_NT_HEADERS *nt_headers;
-
- if (dos_header->e_magic==IMAGE_DOS_SIGNATURE)
- {
- nt_headers = (IMAGE_NT_HEADERS *)((char *)dos_header
- + dos_header->e_lfanew);
- if (nt_headers->Signature==IMAGE_NT_SIGNATURE &&
- hinstDLL!=(HINSTANCE)(nt_headers->OptionalHeader.ImageBase))
- OPENSSL_NONPIC_relocated=1;
- }
- }
-#endif
- break;
- case DLL_THREAD_ATTACH:
- break;
- case DLL_THREAD_DETACH:
- break;
- case DLL_PROCESS_DETACH:
- break;
- }
- return(TRUE);
- }
-#endif
+/*
+ * All we really need to do is remove the 'error' state when a thread
+ * detaches
+ */
-#if defined(_WIN32) && !defined(__CYGWIN__)
-#include <tchar.h>
-#include <signal.h>
-#ifdef __WATCOMC__
-#if defined(_UNICODE) || defined(__UNICODE__)
-#define _vsntprintf _vsnwprintf
-#else
-#define _vsntprintf _vsnprintf
-#endif
-#endif
-#ifdef _MSC_VER
-#define alloca _alloca
+BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
+{
+ switch (fdwReason) {
+ case DLL_PROCESS_ATTACH:
+ OPENSSL_cpuid_setup();
+# if defined(_WIN32_WINNT)
+ {
+ IMAGE_DOS_HEADER *dos_header = (IMAGE_DOS_HEADER *) hinstDLL;
+ IMAGE_NT_HEADERS *nt_headers;
+
+ if (dos_header->e_magic == IMAGE_DOS_SIGNATURE) {
+ nt_headers = (IMAGE_NT_HEADERS *) ((char *)dos_header
+ + dos_header->e_lfanew);
+ if (nt_headers->Signature == IMAGE_NT_SIGNATURE &&
+ hinstDLL !=
+ (HINSTANCE) (nt_headers->OptionalHeader.ImageBase))
+ OPENSSL_NONPIC_relocated = 1;
+ }
+ }
+# endif
+ break;
+ case DLL_THREAD_ATTACH:
+ break;
+ case DLL_THREAD_DETACH:
+ break;
+ case DLL_PROCESS_DETACH:
+ break;
+ }
+ return (TRUE);
+}
#endif
-#if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
+#if defined(_WIN32) && !defined(__CYGWIN__)
+# include <tchar.h>
+# include <signal.h>
+# ifdef __WATCOMC__
+# if defined(_UNICODE) || defined(__UNICODE__)
+# define _vsntprintf _vsnwprintf
+# else
+# define _vsntprintf _vsnprintf
+# endif
+# endif
+# ifdef _MSC_VER
+# define alloca _alloca
+# endif
+
+# if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
int OPENSSL_isservice(void)
-{ HWINSTA h;
- DWORD len;
- WCHAR *name;
- static union { void *p; int (*f)(void); } _OPENSSL_isservice = { NULL };
+{
+ HWINSTA h;
+ DWORD len;
+ WCHAR *name;
+ static union {
+ void *p;
+ FARPROC f;
+ } _OPENSSL_isservice = {
+ NULL
+ };
if (_OPENSSL_isservice.p == NULL) {
- HANDLE h = GetModuleHandle(NULL);
- if (h != NULL)
- _OPENSSL_isservice.p = GetProcAddress(h,"_OPENSSL_isservice");
- if (_OPENSSL_isservice.p == NULL)
- _OPENSSL_isservice.p = (void *)-1;
+ HANDLE mod = GetModuleHandle(NULL);
+ if (mod != NULL)
+ _OPENSSL_isservice.f = GetProcAddress(mod, "_OPENSSL_isservice");
+ if (_OPENSSL_isservice.p == NULL)
+ _OPENSSL_isservice.p = (void *)-1;
}
if (_OPENSSL_isservice.p != (void *)-1)
- return (*_OPENSSL_isservice.f)();
-
- (void)GetDesktopWindow(); /* return value is ignored */
+ return (*_OPENSSL_isservice.f) ();
h = GetProcessWindowStation();
- if (h==NULL) return -1;
-
- if (GetUserObjectInformationW (h,UOI_NAME,NULL,0,&len) ||
- GetLastError() != ERROR_INSUFFICIENT_BUFFER)
- return -1;
-
- if (len>512) return -1; /* paranoia */
- len++,len&=~1; /* paranoia */
- name=(WCHAR *)alloca(len+sizeof(WCHAR));
- if (!GetUserObjectInformationW (h,UOI_NAME,name,len,&len))
- return -1;
-
- len++,len&=~1; /* paranoia */
- name[len/sizeof(WCHAR)]=L'\0'; /* paranoia */
-#if 1
- /* This doesn't cover "interactive" services [working with real
- * WinSta0's] nor programs started non-interactively by Task
- * Scheduler [those are working with SAWinSta]. */
- if (wcsstr(name,L"Service-0x")) return 1;
-#else
+ if (h == NULL)
+ return -1;
+
+ if (GetUserObjectInformationW(h, UOI_NAME, NULL, 0, &len) ||
+ GetLastError() != ERROR_INSUFFICIENT_BUFFER)
+ return -1;
+
+ if (len > 512)
+ return -1; /* paranoia */
+ len++, len &= ~1; /* paranoia */
+ name = (WCHAR *)alloca(len + sizeof(WCHAR));
+ if (!GetUserObjectInformationW(h, UOI_NAME, name, len, &len))
+ return -1;
+
+ len++, len &= ~1; /* paranoia */
+ name[len / sizeof(WCHAR)] = L'\0'; /* paranoia */
+# if 1
+ /*
+ * This doesn't cover "interactive" services [working with real
+ * WinSta0's] nor programs started non-interactively by Task Scheduler
+ * [those are working with SAWinSta].
+ */
+ if (wcsstr(name, L"Service-0x"))
+ return 1;
+# else
/* This covers all non-interactive programs such as services. */
- if (!wcsstr(name,L"WinSta0")) return 1;
-#endif
- else return 0;
+ if (!wcsstr(name, L"WinSta0"))
+ return 1;
+# endif
+ else
+ return 0;
}
-#else
-int OPENSSL_isservice(void) { return 0; }
-#endif
-
-void OPENSSL_showfatal (const char *fmta,...)
-{ va_list ap;
- TCHAR buf[256];
- const TCHAR *fmt;
-#ifdef STD_ERROR_HANDLE /* what a dirty trick! */
- HANDLE h;
-
- if ((h=GetStdHandle(STD_ERROR_HANDLE)) != NULL &&
- GetFileType(h)!=FILE_TYPE_UNKNOWN)
- { /* must be console application */
- int len;
- DWORD out;
-
- va_start (ap,fmta);
- len=_vsnprintf((char *)buf,sizeof(buf),fmt,ap);
- WriteFile(h,buf,len<0?sizeof(buf):(DWORD)len,&out,NULL);
- va_end (ap);
- return;
+# else
+int OPENSSL_isservice(void)
+{
+ return 0;
+}
+# endif
+
+void OPENSSL_showfatal(const char *fmta, ...)
+{
+ va_list ap;
+ TCHAR buf[256];
+ const TCHAR *fmt;
+# ifdef STD_ERROR_HANDLE /* what a dirty trick! */
+ HANDLE h;
+
+ if ((h = GetStdHandle(STD_ERROR_HANDLE)) != NULL &&
+ GetFileType(h) != FILE_TYPE_UNKNOWN) {
+ /* must be console application */
+ int len;
+ DWORD out;
+
+ va_start(ap, fmta);
+ len = _vsnprintf((char *)buf, sizeof(buf), fmta, ap);
+ WriteFile(h, buf, len < 0 ? sizeof(buf) : (DWORD) len, &out, NULL);
+ va_end(ap);
+ return;
}
-#endif
-
- if (sizeof(TCHAR)==sizeof(char))
- fmt=(const TCHAR *)fmta;
- else do
- { int keepgoing;
- size_t len_0=strlen(fmta)+1,i;
- WCHAR *fmtw;
+# endif
- fmtw = (WCHAR *)alloca(len_0*sizeof(WCHAR));
- if (fmtw == NULL) { fmt=(const TCHAR *)L"no stack?"; break; }
-
-#ifndef OPENSSL_NO_MULTIBYTE
- if (!MultiByteToWideChar(CP_ACP,0,fmta,len_0,fmtw,len_0))
-#endif
- for (i=0;i<len_0;i++) fmtw[i]=(WCHAR)fmta[i];
-
- for (i=0;i<len_0;i++)
- { if (fmtw[i]==L'%') do
- { keepgoing=0;
- switch (fmtw[i+1])
- { case L'0': case L'1': case L'2': case L'3': case L'4':
- case L'5': case L'6': case L'7': case L'8': case L'9':
- case L'.': case L'*':
- case L'-': i++; keepgoing=1; break;
- case L's': fmtw[i+1]=L'S'; break;
- case L'S': fmtw[i+1]=L's'; break;
- case L'c': fmtw[i+1]=L'C'; break;
- case L'C': fmtw[i+1]=L'c'; break;
- }
- } while (keepgoing);
- }
- fmt = (const TCHAR *)fmtw;
- } while (0);
-
- va_start (ap,fmta);
- _vsntprintf (buf,sizeof(buf)/sizeof(TCHAR)-1,fmt,ap);
- buf [sizeof(buf)/sizeof(TCHAR)-1] = _T('\0');
- va_end (ap);
-
-#if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
- /* this -------------v--- guards NT-specific calls */
- if (GetVersion() < 0x80000000 && OPENSSL_isservice() > 0)
- { HANDLE h = RegisterEventSource(0,_T("OPENSSL"));
- const TCHAR *pmsg=buf;
- ReportEvent(h,EVENTLOG_ERROR_TYPE,0,0,0,1,0,&pmsg,0);
- DeregisterEventSource(h);
- }
+ if (sizeof(TCHAR) == sizeof(char))
+ fmt = (const TCHAR *)fmta;
else
+ do {
+ int keepgoing;
+ size_t len_0 = strlen(fmta) + 1, i;
+ WCHAR *fmtw;
+
+ fmtw = (WCHAR *)alloca(len_0 * sizeof(WCHAR));
+ if (fmtw == NULL) {
+ fmt = (const TCHAR *)L"no stack?";
+ break;
+ }
+ if (!MultiByteToWideChar(CP_ACP, 0, fmta, len_0, fmtw, len_0))
+ for (i = 0; i < len_0; i++)
+ fmtw[i] = (WCHAR)fmta[i];
+ for (i = 0; i < len_0; i++) {
+ if (fmtw[i] == L'%')
+ do {
+ keepgoing = 0;
+ switch (fmtw[i + 1]) {
+ case L'0':
+ case L'1':
+ case L'2':
+ case L'3':
+ case L'4':
+ case L'5':
+ case L'6':
+ case L'7':
+ case L'8':
+ case L'9':
+ case L'.':
+ case L'*':
+ case L'-':
+ i++;
+ keepgoing = 1;
+ break;
+ case L's':
+ fmtw[i + 1] = L'S';
+ break;
+ case L'S':
+ fmtw[i + 1] = L's';
+ break;
+ case L'c':
+ fmtw[i + 1] = L'C';
+ break;
+ case L'C':
+ fmtw[i + 1] = L'c';
+ break;
+ }
+ } while (keepgoing);
+ }
+ fmt = (const TCHAR *)fmtw;
+ } while (0);
+
+ va_start(ap, fmta);
+ _vsntprintf(buf, OSSL_NELEM(buf) - 1, fmt, ap);
+ buf[OSSL_NELEM(buf) - 1] = _T('\0');
+ va_end(ap);
+
+# if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
+ /* this -------------v--- guards NT-specific calls */
+ if (check_winnt() && OPENSSL_isservice() > 0) {
+ HANDLE hEventLog = RegisterEventSource(NULL, _T("OpenSSL"));
+
+ if (hEventLog != NULL) {
+ const TCHAR *pmsg = buf;
+
+ if (!ReportEvent(hEventLog, EVENTLOG_ERROR_TYPE, 0, 0, NULL,
+ 1, 0, &pmsg, NULL)) {
+#if defined(DEBUG)
+ /*
+ * We are in a situation where we tried to report a critical
+ * error and this failed for some reason. As a last resort,
+ * in debug builds, send output to the debugger or any other
+ * tool like DebugView which can monitor the output.
+ */
+ OutputDebugString(pmsg);
#endif
- MessageBox (NULL,buf,_T("OpenSSL: FATAL"),MB_OK|MB_ICONSTOP);
+ }
+
+ (void)DeregisterEventSource(hEventLog);
+ }
+ } else
+# endif
+ MessageBox(NULL, buf, _T("OpenSSL: FATAL"), MB_OK | MB_ICONERROR);
}
#else
-void OPENSSL_showfatal (const char *fmta,...)
-{ va_list ap;
+void OPENSSL_showfatal(const char *fmta, ...)
+{
+#ifndef OPENSSL_NO_STDIO
+ va_list ap;
+
+ va_start(ap, fmta);
+ vfprintf(stderr, fmta, ap);
+ va_end(ap);
+#endif
+}
- va_start (ap,fmta);
- vfprintf (stderr,fmta,ap);
- va_end (ap);
+int OPENSSL_isservice(void)
+{
+ return 0;
}
-int OPENSSL_isservice (void) { return 0; }
#endif
-void OpenSSLDie(const char *file,int line,const char *assertion)
- {
- OPENSSL_showfatal(
- "%s(%d): OpenSSL internal error, assertion failed: %s\n",
- file,line,assertion);
+void OpenSSLDie(const char *file, int line, const char *assertion)
+{
+ OPENSSL_showfatal
+ ("%s(%d): OpenSSL internal error, assertion failed: %s\n", file, line,
+ assertion);
#if !defined(_WIN32) || defined(__CYGWIN__)
- abort();
+ abort();
#else
- /* Win32 abort() customarily shows a dialog, but we just did that... */
- raise(SIGABRT);
- _exit(3);
+ /*
+ * Win32 abort() customarily shows a dialog, but we just did that...
+ */
+# if !defined(_WIN32_WCE)
+ raise(SIGABRT);
+# endif
+ _exit(3);
#endif
- }
+}
-#ifndef OPENSSL_FIPSCANISTER
-void *OPENSSL_stderr(void) { return stderr; }
-#endif
+/* volatile unsigned char* pointers are there because
+ * 1. Accessing a variable declared volatile via a pointer
+ * that lacks a volatile qualifier causes undefined behavior.
+ * 2. When the variable itself is not volatile the compiler is
+ * not required to keep all those reads and can convert
+ * this into canonical memcmp() which doesn't read the whole block.
+ * Pointers to volatile resolve the first problem fully. The second
+ * problem cannot be resolved in any Standard-compliant way but this
+ * works the problem around. Compilers typically react to
+ * pointers to volatile by preserving the reads and writes through them.
+ * The latter is not required by the Standard if the memory pointed to
+ * is not volatile.
+ * Pointers themselves are volatile in the function signature to work
+ * around a subtle bug in gcc 4.6+ which causes writes through
+ * pointers to volatile to not be emitted in some rare,
+ * never needed in real life, pieces of code.
+ */
+int CRYPTO_memcmp(const volatile void * volatile in_a,
+ const volatile void * volatile in_b,
+ size_t len)
+{
+ size_t i;
+ const volatile unsigned char *a = in_a;
+ const volatile unsigned char *b = in_b;
+ unsigned char x = 0;
+
+ for (i = 0; i < len; i++)
+ x |= a[i] ^ b[i];
+
+ return x;
+}
projects / openssl.git / blobdiff