Rename lst1 to list1 to avoid name conflict on some platforms.
[openssl.git] / crypto / cryptlib.c
1 /* crypto/cryptlib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young (eay@cryptsoft.com).
7  * The implementation was written so as to conform with Netscapes SSL.
8  * 
9  * This library is free for commercial and non-commercial use as long as
10  * the following conditions are aheared to.  The following conditions
11  * apply to all code found in this distribution, be it the RC4, RSA,
12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13  * included with this distribution is covered by the same copyright terms
14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15  * 
16  * Copyright remains Eric Young's, and as such any Copyright notices in
17  * the code are not to be removed.
18  * If this package is used in a product, Eric Young should be given attribution
19  * as the author of the parts of the library used.
20  * This can be in the form of a textual message at program startup or
21  * in documentation (online or textual) provided with the package.
22  * 
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
26  * 1. Redistributions of source code must retain the copyright
27  *    notice, this list of conditions and the following disclaimer.
28  * 2. Redistributions in binary form must reproduce the above copyright
29  *    notice, this list of conditions and the following disclaimer in the
30  *    documentation and/or other materials provided with the distribution.
31  * 3. All advertising materials mentioning features or use of this software
32  *    must display the following acknowledgement:
33  *    "This product includes cryptographic software written by
34  *     Eric Young (eay@cryptsoft.com)"
35  *    The word 'cryptographic' can be left out if the rouines from the library
36  *    being used are not cryptographic related :-).
37  * 4. If you include any Windows specific code (or a derivative thereof) from 
38  *    the apps directory (application code) you must include an acknowledgement:
39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40  * 
41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  * 
53  * The licence and distribution terms for any publically available version or
54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55  * copied and put under another distribution licence
56  * [including the GNU Public Licence.]
57  */
58
59 #include <stdio.h>
60 #include <string.h>
61 #include "cryptlib.h"
62 #include <openssl/crypto.h>
63
64 #if defined(WIN32) || defined(WIN16)
65 static double SSLeay_MSVC5_hack=0.0; /* and for VC1.5 */
66 #endif
67
68 /* real #defines in crypto.h, keep these upto date */
69 static const char* lock_names[CRYPTO_NUM_LOCKS] =
70         {
71         "<<ERROR>>",
72         "err",
73         "err_hash",
74         "x509",
75         "x509_info",
76         "x509_pkey",
77         "x509_crl",
78         "x509_req",
79         "dsa",
80         "rsa",
81         "evp_pkey",
82         "x509_store",
83         "ssl_ctx",
84         "ssl_cert",
85         "ssl_session",
86         "ssl_sess_cert",
87         "ssl",
88         "rand",
89         "debug_malloc",
90         "BIO",
91         "gethostbyname",
92         "getservbyname",
93         "readdir",
94         "RSA_blinding",
95         "dh",
96         "debug_malloc2",
97 #if CRYPTO_NUM_LOCKS != 26
98 # error "Inconsistency between crypto.h and cryptlib.c"
99 #endif
100         };
101
102 static STACK *app_locks=NULL;
103
104 static void (MS_FAR *locking_callback)(int mode,int type,
105         const char *file,int line)=NULL;
106 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
107         int type,const char *file,int line)=NULL;
108 static unsigned long (MS_FAR *id_callback)(void)=NULL;
109 int CRYPTO_get_new_lockid(char *name)
110         {
111         char *str;
112         int i;
113
114         /* A hack to make Visual C++ 5.0 work correctly when linking as
115          * a DLL using /MT. Without this, the application cannot use
116          * and floating point printf's.
117          * It also seems to be needed for Visual C 1.5 (win16) */
118 #if defined(WIN32) || defined(WIN16)
119         SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
120 #endif
121
122         if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
123                 {
124                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
125                 return(0);
126                 }
127         if ((str=BUF_strdup(name)) == NULL)
128                 return(0);
129         i=sk_push(app_locks,str);
130         if (!i)
131                 Free(str);
132         else
133                 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
134         return(i);
135         }
136
137 int CRYPTO_num_locks(void)
138         {
139         return CRYPTO_NUM_LOCKS;
140         }
141
142 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
143                 int line)
144         {
145         return(locking_callback);
146         }
147
148 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
149                                           const char *file,int line)
150         {
151         return(add_lock_callback);
152         }
153
154 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
155                                               const char *file,int line))
156         {
157         locking_callback=func;
158         }
159
160 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
161                                               const char *file,int line))
162         {
163         add_lock_callback=func;
164         }
165
166 unsigned long (*CRYPTO_get_id_callback(void))(void)
167         {
168         return(id_callback);
169         }
170
171 void CRYPTO_set_id_callback(unsigned long (*func)(void))
172         {
173         id_callback=func;
174         }
175
176 unsigned long CRYPTO_thread_id(void)
177         {
178         unsigned long ret=0;
179
180         if (id_callback == NULL)
181                 {
182 #ifdef WIN16
183                 ret=(unsigned long)GetCurrentTask();
184 #elif defined(WIN32)
185                 ret=(unsigned long)GetCurrentThreadId();
186 #elif defined(GETPID_IS_MEANINGLESS)
187                 ret=1L;
188 #else
189                 ret=(unsigned long)getpid();
190 #endif
191                 }
192         else
193                 ret=id_callback();
194         return(ret);
195         }
196
197 void CRYPTO_lock(int mode, int type, const char *file, int line)
198         {
199 #ifdef LOCK_DEBUG
200                 {
201                 char *rw_text,*operation_text;
202
203                 if (mode & CRYPTO_LOCK)
204                         operation_text="lock  ";
205                 else if (mode & CRYPTO_UNLOCK)
206                         operation_text="unlock";
207                 else
208                         operation_text="ERROR ";
209
210                 if (mode & CRYPTO_READ)
211                         rw_text="r";
212                 else if (mode & CRYPTO_WRITE)
213                         rw_text="w";
214                 else
215                         rw_text="ERROR";
216
217                 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
218                         CRYPTO_thread_id(), rw_text, operation_text,
219                         CRYPTO_get_lock_name(type), file, line);
220                 }
221 #endif
222         if (locking_callback != NULL)
223                 locking_callback(mode,type,file,line);
224         }
225
226 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
227              int line)
228         {
229         int ret;
230
231         if (add_lock_callback != NULL)
232                 {
233 #ifdef LOCK_DEBUG
234                 int before= *pointer;
235 #endif
236
237                 ret=add_lock_callback(pointer,amount,type,file,line);
238 #ifdef LOCK_DEBUG
239                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
240                         CRYPTO_thread_id(),
241                         before,amount,ret,
242                         CRYPTO_get_lock_name(type),
243                         file,line);
244 #endif
245                 *pointer=ret;
246                 }
247         else
248                 {
249                 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
250
251                 ret= *pointer+amount;
252 #ifdef LOCK_DEBUG
253                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
254                         CRYPTO_thread_id(),
255                         *pointer,amount,ret,
256                         CRYPTO_get_lock_name(type),
257                         file,line);
258 #endif
259                 *pointer=ret;
260                 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
261                 }
262         return(ret);
263         }
264
265 const char *CRYPTO_get_lock_name(int type)
266         {
267         if (type < 0)
268                 return("ERROR");
269         else if (type < CRYPTO_NUM_LOCKS)
270                 return(lock_names[type]);
271         else if (type-CRYPTO_NUM_LOCKS >= sk_num(app_locks))
272                 return("ERROR");
273         else
274                 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
275         }
276
277 #ifdef _DLL
278 #ifdef WIN32
279
280 /* All we really need to do is remove the 'error' state when a thread
281  * detaches */
282
283 BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
284              LPVOID lpvReserved)
285         {
286         switch(fdwReason)
287                 {
288         case DLL_PROCESS_ATTACH:
289                 break;
290         case DLL_THREAD_ATTACH:
291                 break;
292         case DLL_THREAD_DETACH:
293                 ERR_remove_state(0);
294                 break;
295         case DLL_PROCESS_DETACH:
296                 break;
297                 }
298         return(TRUE);
299         }
300 #endif
301
302 #endif