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openssl/crypto/cryptlib.c

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/* crypto/cryptlib.c */
/* 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.]
*/
#include <stdio.h>
#include <string.h>
#include "cryptlib.h"
#include <openssl/crypto.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)
IMPLEMENT_STACK_OF(CRYPTO_dynlock)
/* real #defines in crypto.h, keep these upto date */
static const char* 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",
"hwcrhk", /* This is a HACK which will disappear in 0.9.8 */
"fips",
"fips2",
#if CRYPTO_NUM_LOCKS != 35
# 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 *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)=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;
static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
(const char *file,int line)=NULL;
static void (MS_FAR *dynlock_lock_callback)(int mode,
struct CRYPTO_dynlock_value *l, const char *file,int line)=NULL;
static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
const char *file,int line)=NULL;
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
* and 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_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_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. */
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)
{
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))
{
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);
}
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 (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
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);
}
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_num(app_locks))
return("ERROR");
else
return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
}
int OPENSSL_NONPIC_relocated=0;
#if defined(_WIN32) && defined(_WINDLL)
/* 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:
#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:
ERR_remove_state(0);
break;
case DLL_PROCESS_DETACH:
break;
}
return(TRUE);
}
#endif
#if defined(_WIN32)
#include <tchar.h>
#if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
static int 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;
}
#endif
void OPENSSL_showfatal (const char *fmta,...)
{ va_list ap;
TCHAR buf[256];
const TCHAR *fmt;
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;
}
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 (GetVersion() < 0x80000000 && IsService())
{ 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
{ MSGBOXPARAMS m;
m.cbSize = sizeof(m);
m.hwndOwner = NULL;
m.lpszCaption = _T("OpenSSL: FATAL");
m.dwStyle = MB_OK;
m.hInstance = NULL;
m.lpszIcon = IDI_ERROR;
m.dwContextHelpId = 0;
m.lpfnMsgBoxCallback = NULL;
m.dwLanguageId = MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US);
m.lpszText = buf;
MessageBoxIndirect (&m);
}
}
#else
void OPENSSL_showfatal (const char *fmta,...)
{ va_list ap;
va_start (ap,fmta);
vfprintf (stderr,fmta,ap);
va_end (ap);
}
#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; }
#ifdef OPENSSL_FIPS
void fips_w_lock(void) { CRYPTO_w_lock(CRYPTO_LOCK_FIPS); }
void fips_w_unlock(void) { CRYPTO_w_unlock(CRYPTO_LOCK_FIPS); }
void fips_r_lock(void) { CRYPTO_r_lock(CRYPTO_LOCK_FIPS); }
void fips_r_unlock(void) { CRYPTO_r_unlock(CRYPTO_LOCK_FIPS); }
static int fips_started = 0;
static unsigned long fips_thread = 0;
void fips_set_started(void)
{
fips_started = 1;
}
int fips_is_started(void)
{
return fips_started;
}
int fips_is_owning_thread(void)
{
int ret = 0;
if (fips_is_started())
{
CRYPTO_r_lock(CRYPTO_LOCK_FIPS2);
if (fips_thread != 0 && fips_thread == CRYPTO_thread_id())
ret = 1;
CRYPTO_r_unlock(CRYPTO_LOCK_FIPS2);
}
return ret;
}
int fips_set_owning_thread(void)
{
int ret = 0;
if (fips_is_started())
{
CRYPTO_w_lock(CRYPTO_LOCK_FIPS2);
if (fips_thread == 0)
{
fips_thread = CRYPTO_thread_id();
ret = 1;
}
CRYPTO_w_unlock(CRYPTO_LOCK_FIPS2);
}
return ret;
}
int fips_clear_owning_thread(void)
{
int ret = 0;
if (fips_is_started())
{
CRYPTO_w_lock(CRYPTO_LOCK_FIPS2);
if (fips_thread == CRYPTO_thread_id())
{
fips_thread = 0;
ret = 1;
}
CRYPTO_w_unlock(CRYPTO_LOCK_FIPS2);
}
return ret;
}
unsigned char *fips_signature_witness(void)
{
extern unsigned char FIPS_signature[];
return FIPS_signature;
}
#endif /* OPENSSL_FIPS */
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