Move locking and thread ID functions into new files lock.c and thr_id.c,
[openssl.git] / crypto / cryptlib.c
index f896c23..d52caa4 100644 (file)
 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))
-       {
-       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)