openssl/crypto/cryptlib.c

/* crypto/cryptlib.c */
/* ====================================================================
 * Copyright (c) 1998-2003 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    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
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * 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:
 * 1. Redistributions of source code must retain the copyright
 *    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 the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     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
 *    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
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * 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
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * ECDH support in OpenSSL originally developed by
 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 */

#include "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

static void (MS_FAR *locking_callback) (int mode, int type,
                                        const char *file, int line) = NULL;
static int (MS_FAR *add_lock_callback) (int *pointer, int amount,
                                        int type, const char *file,
                                        int line) = NULL;
static unsigned long (MS_FAR *id_callback) (void) = NULL;

int CRYPTO_num_locks(void)
{
    return CRYPTO_NUM_LOCKS;
}

void (*CRYPTO_get_locking_callback(void)) (int mode, int type,
                                           const char *file, int line) {
    return (locking_callback);
}

int (*CRYPTO_get_add_lock_callback(void)) (int *num, int mount, int type,
                                           const char *file, int line) {
    return (add_lock_callback);
}

void CRYPTO_set_locking_callback(void (*func) (int mode, int type,
                                               const char *file, int line))
{
    locking_callback = func;
}

void CRYPTO_set_add_lock_callback(int (*func) (int *num, int mount, int type,
                                               const char *file, int line))
{
    add_lock_callback = func;
}

unsigned long (*CRYPTO_get_id_callback(void)) (void) {
    return (id_callback);
}

void CRYPTO_set_id_callback(unsigned long (*func) (void))
{
    id_callback = func;
}

unsigned long CRYPTO_thread_id(void)
{
    unsigned long ret = 0;

    if (id_callback == NULL) {
#ifdef OPENSSL_SYS_WIN16
        ret = (unsigned long)GetCurrentTask();
#elif defined(OPENSSL_SYS_WIN32)
        ret = (unsigned long)GetCurrentThreadId();
#elif defined(GETPID_IS_MEANINGLESS)
        ret = 1L;
#else
        ret = (unsigned long)getpid();
#endif
    } else
        ret = id_callback();
    return (ret);
}

static void (*do_dynlock_cb) (int mode, int type, const char *file, int line);

void int_CRYPTO_set_do_dynlock_callback(void (*dyn_cb)
                                         (int mode, int type,
                                          const char *file, int line))
{
    do_dynlock_cb = dyn_cb;
}

void CRYPTO_lock(int mode, int type, const char *file, int line)
{
#ifdef LOCK_DEBUG
    {
        char *rw_text, *operation_text;

        if (mode & CRYPTO_LOCK)
            operation_text = "lock  ";
        else if (mode & CRYPTO_UNLOCK)
            operation_text = "unlock";
        else
            operation_text = "ERROR ";

        if (mode & CRYPTO_READ)
            rw_text = "r";
        else if (mode & CRYPTO_WRITE)
            rw_text = "w";
        else
            rw_text = "ERROR";

        fprintf(stderr, "lock:%08lx:(%s)%s %-18s %s:%d\n",
                CRYPTO_thread_id(), rw_text, operation_text,
                CRYPTO_get_lock_name(type), file, line);
    }
#endif
    if (type < 0) {
        if (do_dynlock_cb)
            do_dynlock_cb(mode, type, file, line);
    } else if (locking_callback != NULL)
        locking_callback(mode, type, file, line);
}

int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
                    int line)
{
    int ret = 0;

    if (add_lock_callback != NULL) {
#ifdef LOCK_DEBUG
        int before = *pointer;
#endif

        ret = add_lock_callback(pointer, amount, type, file, line);
#ifdef LOCK_DEBUG
        fprintf(stderr, "ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
                CRYPTO_thread_id(),
                before, amount, ret, CRYPTO_get_lock_name(type), file, line);
#endif
    } else {
        CRYPTO_lock(CRYPTO_LOCK | CRYPTO_WRITE, type, file, line);

        ret = *pointer + amount;
#ifdef LOCK_DEBUG
        fprintf(stderr, "ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
                CRYPTO_thread_id(),
                *pointer, amount, ret,
                CRYPTO_get_lock_name(type), file, line);
#endif
        *pointer = ret;
        CRYPTO_lock(CRYPTO_UNLOCK | CRYPTO_WRITE, type, file, line);
    }
    return (ret);
}

#if     defined(__i386)   || defined(__i386__)   || defined(_M_IX86) || \
        defined(__INTEL__) || \
        defined(__x86_64) || defined(__x86_64__) || \
        defined(_M_AMD64) || defined(_M_X64)

unsigned long OPENSSL_ia32cap_P = 0;
unsigned long *OPENSSL_ia32cap_loc(void)
{
    return &OPENSSL_ia32cap_P;
}

# if defined(OPENSSL_CPUID_OBJ) && !defined(OPENSSL_NO_ASM) && !defined(I386_ONLY)
#  define OPENSSL_CPUID_SETUP
void OPENSSL_cpuid_setup(void)
{
    static int trigger = 0;
    unsigned long OPENSSL_ia32_cpuid(void);
    char *env;

    if (trigger)
        return;

    trigger = 1;
    if ((env = getenv("OPENSSL_ia32cap")))
        OPENSSL_ia32cap_P = strtoul(env, NULL, 0) | (1 << 10);
    else
        OPENSSL_ia32cap_P = OPENSSL_ia32_cpuid() | (1 << 10);
    /*
     * |(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.
     */
}
# endif

#else
unsigned long *OPENSSL_ia32cap_loc(void)
{
    return NULL;
}
#endif
int OPENSSL_NONPIC_relocated = 0;
#if !defined(OPENSSL_CPUID_SETUP)
void OPENSSL_cpuid_setup(void)
{
}
#endif

#if (defined(_WIN32) || defined(__CYGWIN__)) && defined(_WINDLL)

# ifdef OPENSSL_FIPS

#  include <tlhelp32.h>
#  if defined(__GNUC__) && __GNUC__>=2
static int DllInit(void) __attribute__ ((constructor));
#  elif defined(_MSC_VER)
static int DllInit(void);
#   ifdef _WIN64
#    pragma section(".CRT$XCU",read)
__declspec(allocate(".CRT$XCU"))
#   else
#    pragma data_seg(".CRT$XCU")
#   endif
static int (*p) (void) = DllInit;
#   pragma data_seg()
#  endif

static int DllInit(void)
{
#  if defined(_WIN32_WINNT)
    union {
        int (*f) (void);
        BYTE *p;
    } t = {
        DllInit
    };
    HANDLE hModuleSnap = INVALID_HANDLE_VALUE;
    IMAGE_DOS_HEADER *dos_header;
    IMAGE_NT_HEADERS *nt_headers;
    MODULEENTRY32 me32 = { sizeof(me32) };

    hModuleSnap = CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, 0);
    if (hModuleSnap != INVALID_HANDLE_VALUE &&
        Module32First(hModuleSnap, &me32))
        do {
            if (t.p >= me32.modBaseAddr &&
                t.p < me32.modBaseAddr + me32.modBaseSize) {
                dos_header = (IMAGE_DOS_HEADER *) me32.modBaseAddr;
                if (dos_header->e_magic == IMAGE_DOS_SIGNATURE) {
                    nt_headers = (IMAGE_NT_HEADERS *)
                        ((BYTE *) dos_header + dos_header->e_lfanew);
                    if (nt_headers->Signature == IMAGE_NT_SIGNATURE &&
                        me32.modBaseAddr !=
                        (BYTE *) nt_headers->OptionalHeader.ImageBase)
                        OPENSSL_NONPIC_relocated = 1;
                }
                break;
            }
        } while (Module32Next(hModuleSnap, &me32));

    if (hModuleSnap != INVALID_HANDLE_VALUE)
        CloseHandle(hModuleSnap);
#  endif
    OPENSSL_cpuid_setup();
    return 0;
}

# else

#  ifdef __CYGWIN__
/* pick DLL_[PROCESS|THREAD]_[ATTACH|DETACH] definitions */
#   include <windows.h>
#  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

#endif

#if defined(_WIN32) && !defined(__CYGWIN__)
# include <tchar.h>

# if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
int OPENSSL_isservice(void)
{
    HWINSTA h;
    DWORD len;
    WCHAR *name;

    (void)GetDesktopWindow();   /* return value is ignored */

    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 */
#  ifdef _MSC_VER
    name = (WCHAR *)_alloca(len + sizeof(WCHAR));
#  else
    name = (WCHAR *)alloca(len + sizeof(WCHAR));
#  endif
    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;
}
# 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 */
        va_start(ap, fmta);
        vfprintf(stderr, fmta, ap);
        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;

# ifdef _MSC_VER
            fmtw = (WCHAR *)_alloca(len_0 * sizeof(WCHAR));
# else
            fmtw = (WCHAR *)alloca(len_0 * sizeof(WCHAR));
# endif
            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 (check_winnt() && 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);
    } else
# endif
        MessageBox(NULL, buf, _T("OpenSSL: FATAL"), MB_OK | MB_ICONSTOP);
}
#else
void OPENSSL_showfatal(const char *fmta, ...)
{
    va_list ap;

    va_start(ap, fmta);
    vfprintf(stderr, fmta, ap);
    va_end(ap);
}

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);
    abort();
}

void *OPENSSL_stderr(void)
{
    return stderr;
}

#ifndef OPENSSL_FIPS

int CRYPTO_memcmp(const void *in_a, const void *in_b, size_t len)
{
    size_t i;
    const unsigned char *a = in_a;
    const unsigned char *b = in_b;
    unsigned char x = 0;

    for (i = 0; i < len; i++)
        x |= a[i] ^ b[i];

    return x;
}
#endif