cryptlib.c

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/* crypto/cryptlib.c */
/* ====================================================================
 * Copyright (c) 1998-2006 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
 *    [email protected].
 *
 * 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
 * ([email protected]).  This product includes software written by Tim
 * Hudson ([email protected]).
 *
 */
/* Copyright (C) 1995-1998 Eric Young ([email protected])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([email protected]).
 * 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 ([email protected]).
 * 
 * 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 ([email protected])"
 *    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 ([email protected])"
 * 
 * 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

DECLARE_STACK_OF(CRYPTO_dynlock)

/* real #defines in crypto.h, keep these upto date */
static const char* const lock_names[CRYPTO_NUM_LOCKS] =
    {
    "<<ERROR>>",
    "err",
    "ex_data",
    "x509",
    "x509_info",
    "x509_pkey",
    "x509_crl",
    "x509_req",
    "dsa",
    "rsa",
    "evp_pkey",
    "x509_store",
    "ssl_ctx",
    "ssl_cert",
    "ssl_session",
    "ssl_sess_cert",
    "ssl",
    "ssl_method",
    "rand",
    "rand2",
    "debug_malloc",
    "BIO",
    "gethostbyname",
    "getservbyname",
    "readdir",
    "RSA_blinding",
    "dh",
    "debug_malloc2",
    "dso",
    "dynlock",
    "engine",
    "ui",
    "ecdsa",
    "ec",
    "ecdh",
    "bn",
    "ec_pre_comp",
    "store",
    "comp",
    "fips",
    "fips2",
#if CRYPTO_NUM_LOCKS != 41
# error "Inconsistency between crypto.h and cryptlib.c"
#endif
    };

/* This is for applications to allocate new type names in the non-dynamic
   array of lock names.  These are numbered with positive numbers.  */
static STACK_OF(OPENSSL_STRING) *app_locks=NULL;

/* For applications that want a more dynamic way of handling threads, the
   following stack is used.  These are externally numbered with negative
   numbers.  */
static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;


static void (MS_FAR *locking_callback)(int mode,int type,
    const char *file,int line)=0;
static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
    int type,const char *file,int line)=0;
#ifndef OPENSSL_NO_DEPRECATED
static unsigned long (MS_FAR *id_callback)(void)=0;
#endif
static void (MS_FAR *threadid_callback)(CRYPTO_THREADID *)=0;
static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
    (const char *file,int line)=0;
static void (MS_FAR *dynlock_lock_callback)(int mode,
    struct CRYPTO_dynlock_value *l, const char *file,int line)=0;
static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
    const char *file,int line)=0;

int CRYPTO_get_new_lockid(char *name)
    {
    char *str;
    int i;

#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
    /* A hack to make Visual C++ 5.0 work correctly when linking as
     * a DLL using /MT. Without this, the application cannot use
     * any floating point printf's.
     * It also seems to be needed for Visual C 1.5 (win16) */
    SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
#endif

    if ((app_locks == NULL) && ((app_locks=sk_OPENSSL_STRING_new_null()) == NULL))
        {
        CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
        return(0);
        }
    if ((str=BUF_strdup(name)) == NULL)
        {
        CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
        return(0);
        }
    i=sk_OPENSSL_STRING_push(app_locks,str);
    if (!i)
        OPENSSL_free(str);
    else
        i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
    return(i);
    }

int CRYPTO_num_locks(void)
    {
    return CRYPTO_NUM_LOCKS;
    }

int CRYPTO_get_new_dynlockid(void)
    {
    int i = 0;
    CRYPTO_dynlock *pointer = NULL;

    if (dynlock_create_callback == NULL)
        {
        CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
        return(0);
        }
    CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
    if ((dyn_locks == NULL)
        && ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
        {
        CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
        CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
        return(0);
        }
    CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);

    pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
    if (pointer == NULL)
        {
        CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
        return(0);
        }
    pointer->references = 1;
    pointer->data = dynlock_create_callback(__FILE__,__LINE__);
    if (pointer->data == NULL)
        {
        OPENSSL_free(pointer);
        CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
        return(0);
        }

    CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
    /* First, try to find an existing empty slot */
    i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
    /* If there was none, push, thereby creating a new one */
    if (i == -1)
        /* Since sk_push() returns the number of items on the
           stack, not the location of the pushed item, we need
           to transform the returned number into a position,
           by decreasing it.  */
        i=sk_CRYPTO_dynlock_push(dyn_locks,pointer) - 1;
    else
        /* If we found a place with a NULL pointer, put our pointer
           in it.  */
        (void)sk_CRYPTO_dynlock_set(dyn_locks,i,pointer);
    CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);

    if (i == -1)
        {
        dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
        OPENSSL_free(pointer);
        }
    else
        i += 1; /* to avoid 0 */
    return -i;
    }

void CRYPTO_destroy_dynlockid(int i)
    {
    CRYPTO_dynlock *pointer = NULL;
    if (i)
        i = -i-1;
    if (dynlock_destroy_callback == NULL)
        return;

    CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);

    if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
        {
        CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
        return;
        }
    pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
    if (pointer != NULL)
        {
        --pointer->references;
#ifdef REF_CHECK
        if (pointer->references < 0)
            {
            fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");
            abort();
            }
        else
#endif
            if (pointer->references <= 0)
                {
                (void)sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
                }
            else
                pointer = NULL;
        }
    CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);

    if (pointer)
        {
        dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
        OPENSSL_free(pointer);
        }
    }

struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
    {
    CRYPTO_dynlock *pointer = NULL;
    if (i)
        i = -i-1;

    CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);

    if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
        pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
    if (pointer)
        pointer->references++;

    CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);

    if (pointer)
        return pointer->data;
    return NULL;
    }

struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
    (const char *file,int line)
    {
    return(dynlock_create_callback);
    }

void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
    struct CRYPTO_dynlock_value *l, const char *file,int line)
    {
    return(dynlock_lock_callback);
    }

void (*CRYPTO_get_dynlock_destroy_callback(void))
    (struct CRYPTO_dynlock_value *l, const char *file,int line)
    {
    return(dynlock_destroy_callback);
    }

void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
    (const char *file, int line))
    {
    dynlock_create_callback=func;
    }

void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
    struct CRYPTO_dynlock_value *l, const char *file, int line))
    {
    dynlock_lock_callback=func;
    }

void CRYPTO_set_dynlock_destroy_callback(void (*func)
    (struct CRYPTO_dynlock_value *l, const char *file, int line))
    {
    dynlock_destroy_callback=func;
    }


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))
    {
    /* Calling this here ensures initialisation before any threads
     * are started.
     */
    OPENSSL_init();
    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;
    }

/* the memset() here and in set_pointer() seem overkill, but for the sake of
 * CRYPTO_THREADID_cmp() this avoids any platform silliness that might cause two
 * "equal" THREADID structs to not be memcmp()-identical. */
void CRYPTO_THREADID_set_numeric(CRYPTO_THREADID *id, unsigned long val)
    {
    memset(id, 0, sizeof(*id));
    id->val = val;
    }

static const unsigned char hash_coeffs[] = { 3, 5, 7, 11, 13, 17, 19, 23 };
void CRYPTO_THREADID_set_pointer(CRYPTO_THREADID *id, void *ptr)
    {
    unsigned char *dest = (void *)&id->val;
    unsigned int accum = 0;
    unsigned char dnum = sizeof(id->val);

    memset(id, 0, sizeof(*id));
    id->ptr = ptr;
    if (sizeof(id->val) >= sizeof(id->ptr))
        {
        /* 'ptr' can be embedded in 'val' without loss of uniqueness */
        id->val = (unsigned long)id->ptr;
        return;
        }
    /* hash ptr ==> val. Each byte of 'val' gets the mod-256 total of a
     * linear function over the bytes in 'ptr', the co-efficients of which
     * are a sequence of low-primes (hash_coeffs is an 8-element cycle) -
     * the starting prime for the sequence varies for each byte of 'val'
     * (unique polynomials unless pointers are >64-bit). For added spice,
     * the totals accumulate rather than restarting from zero, and the index
     * of the 'val' byte is added each time (position dependence). If I was
     * a black-belt, I'd scan big-endian pointers in reverse to give
     * low-order bits more play, but this isn't crypto and I'd prefer nobody
     * mistake it as such. Plus I'm lazy. */
    while (dnum--)
        {
        const unsigned char *src = (void *)&id->ptr;
        unsigned char snum = sizeof(id->ptr);
        while (snum--)
            accum += *(src++) * hash_coeffs[(snum + dnum) & 7];
        accum += dnum;
        *(dest++) = accum & 255;
        }
    }

int CRYPTO_THREADID_set_callback(void (*func)(CRYPTO_THREADID *))
    {
    if (threadid_callback)
        return 0;
    threadid_callback = func;
    return 1;
    }

void (*CRYPTO_THREADID_get_callback(void))(CRYPTO_THREADID *)
    {
    return threadid_callback;
    }

void CRYPTO_THREADID_current(CRYPTO_THREADID *id)
    {
    if (threadid_callback)
        {
        threadid_callback(id);
        return;
        }
#ifndef OPENSSL_NO_DEPRECATED
    /* If the deprecated callback was set, fall back to that */
    if (id_callback)
        {
        CRYPTO_THREADID_set_numeric(id, id_callback());
        return;
        }
#endif
    /* Else pick a backup */
#ifdef OPENSSL_SYS_WIN16
    CRYPTO_THREADID_set_numeric(id, (unsigned long)GetCurrentTask());
#elif defined(OPENSSL_SYS_WIN32)
    CRYPTO_THREADID_set_numeric(id, (unsigned long)GetCurrentThreadId());
#elif defined(OPENSSL_SYS_BEOS)
    CRYPTO_THREADID_set_numeric(id, (unsigned long)find_thread(NULL));
#else
    /* For everything else, default to using the address of 'errno' */
    CRYPTO_THREADID_set_pointer(id, &errno);
#endif
    }

int CRYPTO_THREADID_cmp(const CRYPTO_THREADID *a, const CRYPTO_THREADID *b)
    {
    return memcmp(a, b, sizeof(*a));
    }

void CRYPTO_THREADID_cpy(CRYPTO_THREADID *dest, const CRYPTO_THREADID *src)
    {
    memcpy(dest, src, sizeof(*src));
    }

unsigned long CRYPTO_THREADID_hash(const CRYPTO_THREADID *id)
    {
    return id->val;
    }

#ifndef OPENSSL_NO_DEPRECATED
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;
#elif defined(OPENSSL_SYS_BEOS)
        ret=(unsigned long)find_thread(NULL);
#else
        ret=(unsigned long)getpid();
#endif
        }
    else
        ret=id_callback();
    return(ret);
    }
#endif

void CRYPTO_lock(int mode, int type, const char *file, int line)
    {
#ifdef LOCK_DEBUG
        {
        CRYPTO_THREADID id;
        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";

        CRYPTO_THREADID_current(&id);
        fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
            CRYPTO_THREADID_hash(&id), rw_text, operation_text,
            CRYPTO_get_lock_name(type), file, line);
        }
#endif
    if (type < 0)
        {
        if (dynlock_lock_callback != NULL)
            {
            struct CRYPTO_dynlock_value *pointer
                = CRYPTO_get_dynlock_value(type);

            OPENSSL_assert(pointer != NULL);

            dynlock_lock_callback(mode, pointer, file, line);

            CRYPTO_destroy_dynlockid(type);
            }
        }
    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
        {
        CRYPTO_THREADID id;
        CRYPTO_THREADID_current(&id);
        fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
            CRYPTO_THREADID_hash(&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
        {
        CRYPTO_THREADID id;
        CRYPTO_THREADID_current(&id);
        fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
            CRYPTO_THREADID_hash(&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);
    }

const char *CRYPTO_get_lock_name(int type)
    {
    if (type < 0)
        return("dynamic");
    else if (type < CRYPTO_NUM_LOCKS)
        return(lock_names[type]);
    else if (type-CRYPTO_NUM_LOCKS > sk_OPENSSL_STRING_num(app_locks))
        return("ERROR");
    else
        return(sk_OPENSSL_STRING_value(app_locks,type-CRYPTO_NUM_LOCKS));
    }

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

unsigned int  OPENSSL_ia32cap_P[2];
unsigned long *OPENSSL_ia32cap_loc(void)
{   if (sizeof(long)==4)
    /*
     * If 32-bit application pulls address of OPENSSL_ia32cap_P[0]
     * clear second element to maintain the illusion that vector
     * is 32-bit.
     */
    OPENSSL_ia32cap_P[1]=0;
    return (unsigned long *)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
void OPENSSL_cpuid_setup(void)
{ static int trigger=0;
  IA32CAP OPENSSL_ia32_cpuid(void);
  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()&~vec;
    }
    else
    vec = OPENSSL_ia32_cpuid();
    /*
     * |(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);
}
#endif

#else
unsigned long *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) {}
#endif

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

/* 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

#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 };

    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;
    }

    if (_OPENSSL_isservice.p != (void *)-1)
    return (*_OPENSSL_isservice.f)();

    (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 */
    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;
}
#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;

    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);
    }
    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);
#if !defined(_WIN32) || defined(__CYGWIN__)
    abort();
#else
    /* Win32 abort() customarily shows a dialog, but we just did that... */
    raise(SIGABRT);
    _exit(3);
#endif
    }

void *OPENSSL_stderr(void)  { return stderr; }