There have been a number of complaints from a number of sources that names
[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         "dso",
98 #if CRYPTO_NUM_LOCKS != 27
99 # error "Inconsistency between crypto.h and cryptlib.c"
100 #endif
101         };
102
103 static STACK *app_locks=NULL;
104
105 static void (MS_FAR *locking_callback)(int mode,int type,
106         const char *file,int line)=NULL;
107 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
108         int type,const char *file,int line)=NULL;
109 static unsigned long (MS_FAR *id_callback)(void)=NULL;
110 int CRYPTO_get_new_lockid(char *name)
111         {
112         char *str;
113         int i;
114
115         /* A hack to make Visual C++ 5.0 work correctly when linking as
116          * a DLL using /MT. Without this, the application cannot use
117          * and floating point printf's.
118          * It also seems to be needed for Visual C 1.5 (win16) */
119 #if defined(WIN32) || defined(WIN16)
120         SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
121 #endif
122
123         if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
124                 {
125                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
126                 return(0);
127                 }
128         if ((str=BUF_strdup(name)) == NULL)
129                 return(0);
130         i=sk_push(app_locks,str);
131         if (!i)
132                 OPENSSL_free(str);
133         else
134                 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
135         return(i);
136         }
137
138 int CRYPTO_num_locks(void)
139         {
140         return CRYPTO_NUM_LOCKS;
141         }
142
143 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
144                 int line)
145         {
146         return(locking_callback);
147         }
148
149 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
150                                           const char *file,int line)
151         {
152         return(add_lock_callback);
153         }
154
155 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
156                                               const char *file,int line))
157         {
158         locking_callback=func;
159         }
160
161 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
162                                               const char *file,int line))
163         {
164         add_lock_callback=func;
165         }
166
167 unsigned long (*CRYPTO_get_id_callback(void))(void)
168         {
169         return(id_callback);
170         }
171
172 void CRYPTO_set_id_callback(unsigned long (*func)(void))
173         {
174         id_callback=func;
175         }
176
177 unsigned long CRYPTO_thread_id(void)
178         {
179         unsigned long ret=0;
180
181         if (id_callback == NULL)
182                 {
183 #ifdef WIN16
184                 ret=(unsigned long)GetCurrentTask();
185 #elif defined(WIN32)
186                 ret=(unsigned long)GetCurrentThreadId();
187 #elif defined(GETPID_IS_MEANINGLESS)
188                 ret=1L;
189 #else
190                 ret=(unsigned long)getpid();
191 #endif
192                 }
193         else
194                 ret=id_callback();
195         return(ret);
196         }
197
198 void CRYPTO_lock(int mode, int type, const char *file, int line)
199         {
200 #ifdef LOCK_DEBUG
201                 {
202                 char *rw_text,*operation_text;
203
204                 if (mode & CRYPTO_LOCK)
205                         operation_text="lock  ";
206                 else if (mode & CRYPTO_UNLOCK)
207                         operation_text="unlock";
208                 else
209                         operation_text="ERROR ";
210
211                 if (mode & CRYPTO_READ)
212                         rw_text="r";
213                 else if (mode & CRYPTO_WRITE)
214                         rw_text="w";
215                 else
216                         rw_text="ERROR";
217
218                 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
219                         CRYPTO_thread_id(), rw_text, operation_text,
220                         CRYPTO_get_lock_name(type), file, line);
221                 }
222 #endif
223         if (locking_callback != NULL)
224                 locking_callback(mode,type,file,line);
225         }
226
227 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
228              int line)
229         {
230         int ret;
231
232         if (add_lock_callback != NULL)
233                 {
234 #ifdef LOCK_DEBUG
235                 int before= *pointer;
236 #endif
237
238                 ret=add_lock_callback(pointer,amount,type,file,line);
239 #ifdef LOCK_DEBUG
240                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
241                         CRYPTO_thread_id(),
242                         before,amount,ret,
243                         CRYPTO_get_lock_name(type),
244                         file,line);
245 #endif
246                 *pointer=ret;
247                 }
248         else
249                 {
250                 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
251
252                 ret= *pointer+amount;
253 #ifdef LOCK_DEBUG
254                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
255                         CRYPTO_thread_id(),
256                         *pointer,amount,ret,
257                         CRYPTO_get_lock_name(type),
258                         file,line);
259 #endif
260                 *pointer=ret;
261                 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
262                 }
263         return(ret);
264         }
265
266 const char *CRYPTO_get_lock_name(int type)
267         {
268         if (type < 0)
269                 return("ERROR");
270         else if (type < CRYPTO_NUM_LOCKS)
271                 return(lock_names[type]);
272         else if (type-CRYPTO_NUM_LOCKS >= sk_num(app_locks))
273                 return("ERROR");
274         else
275                 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
276         }
277
278 #ifdef _DLL
279 #ifdef WIN32
280
281 /* All we really need to do is remove the 'error' state when a thread
282  * detaches */
283
284 BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
285              LPVOID lpvReserved)
286         {
287         switch(fdwReason)
288                 {
289         case DLL_PROCESS_ATTACH:
290                 break;
291         case DLL_THREAD_ATTACH:
292                 break;
293         case DLL_THREAD_DETACH:
294                 ERR_remove_state(0);
295                 break;
296         case DLL_PROCESS_DETACH:
297                 break;
298                 }
299         return(TRUE);
300         }
301 #endif
302
303 #endif