Branch data Line data Source code
1 : : /* crypto/cryptlib.c */
2 : : /* ====================================================================
3 : : * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
4 : : *
5 : : * Redistribution and use in source and binary forms, with or without
6 : : * modification, are permitted provided that the following conditions
7 : : * are met:
8 : : *
9 : : * 1. Redistributions of source code must retain the above copyright
10 : : * notice, this list of conditions and the following disclaimer.
11 : : *
12 : : * 2. Redistributions in binary form must reproduce the above copyright
13 : : * notice, this list of conditions and the following disclaimer in
14 : : * the documentation and/or other materials provided with the
15 : : * distribution.
16 : : *
17 : : * 3. All advertising materials mentioning features or use of this
18 : : * software must display the following acknowledgment:
19 : : * "This product includes software developed by the OpenSSL Project
20 : : * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
21 : : *
22 : : * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 : : * endorse or promote products derived from this software without
24 : : * prior written permission. For written permission, please contact
25 : : * openssl-core@openssl.org.
26 : : *
27 : : * 5. Products derived from this software may not be called "OpenSSL"
28 : : * nor may "OpenSSL" appear in their names without prior written
29 : : * permission of the OpenSSL Project.
30 : : *
31 : : * 6. Redistributions of any form whatsoever must retain the following
32 : : * acknowledgment:
33 : : * "This product includes software developed by the OpenSSL Project
34 : : * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
35 : : *
36 : : * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 : : * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 : : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 : : * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 : : * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 : : * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 : : * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 : : * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 : : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 : : * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46 : : * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 : : * OF THE POSSIBILITY OF SUCH DAMAGE.
48 : : * ====================================================================
49 : : *
50 : : * This product includes cryptographic software written by Eric Young
51 : : * (eay@cryptsoft.com). This product includes software written by Tim
52 : : * Hudson (tjh@cryptsoft.com).
53 : : *
54 : : */
55 : : /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
56 : : * All rights reserved.
57 : : *
58 : : * This package is an SSL implementation written
59 : : * by Eric Young (eay@cryptsoft.com).
60 : : * The implementation was written so as to conform with Netscapes SSL.
61 : : *
62 : : * This library is free for commercial and non-commercial use as long as
63 : : * the following conditions are aheared to. The following conditions
64 : : * apply to all code found in this distribution, be it the RC4, RSA,
65 : : * lhash, DES, etc., code; not just the SSL code. The SSL documentation
66 : : * included with this distribution is covered by the same copyright terms
67 : : * except that the holder is Tim Hudson (tjh@cryptsoft.com).
68 : : *
69 : : * Copyright remains Eric Young's, and as such any Copyright notices in
70 : : * the code are not to be removed.
71 : : * If this package is used in a product, Eric Young should be given attribution
72 : : * as the author of the parts of the library used.
73 : : * This can be in the form of a textual message at program startup or
74 : : * in documentation (online or textual) provided with the package.
75 : : *
76 : : * Redistribution and use in source and binary forms, with or without
77 : : * modification, are permitted provided that the following conditions
78 : : * are met:
79 : : * 1. Redistributions of source code must retain the copyright
80 : : * notice, this list of conditions and the following disclaimer.
81 : : * 2. Redistributions in binary form must reproduce the above copyright
82 : : * notice, this list of conditions and the following disclaimer in the
83 : : * documentation and/or other materials provided with the distribution.
84 : : * 3. All advertising materials mentioning features or use of this software
85 : : * must display the following acknowledgement:
86 : : * "This product includes cryptographic software written by
87 : : * Eric Young (eay@cryptsoft.com)"
88 : : * The word 'cryptographic' can be left out if the rouines from the library
89 : : * being used are not cryptographic related :-).
90 : : * 4. If you include any Windows specific code (or a derivative thereof) from
91 : : * the apps directory (application code) you must include an acknowledgement:
92 : : * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
93 : : *
94 : : * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
95 : : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
96 : : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
97 : : * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
98 : : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
99 : : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
100 : : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
101 : : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
102 : : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
103 : : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
104 : : * SUCH DAMAGE.
105 : : *
106 : : * The licence and distribution terms for any publically available version or
107 : : * derivative of this code cannot be changed. i.e. this code cannot simply be
108 : : * copied and put under another distribution licence
109 : : * [including the GNU Public Licence.]
110 : : */
111 : : /* ====================================================================
112 : : * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 : : * ECDH support in OpenSSL originally developed by
114 : : * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
115 : : */
116 : :
117 : : #include "cryptlib.h"
118 : :
119 : : #ifndef OPENSSL_NO_DEPRECATED
120 : : static unsigned long (MS_FAR *id_callback)(void)=0;
121 : : #endif
122 : : static void (MS_FAR *threadid_callback)(CRYPTO_THREADID *)=0;
123 : :
124 : : /* the memset() here and in set_pointer() seem overkill, but for the sake of
125 : : * CRYPTO_THREADID_cmp() this avoids any platform silliness that might cause two
126 : : * "equal" THREADID structs to not be memcmp()-identical. */
127 : 0 : void CRYPTO_THREADID_set_numeric(CRYPTO_THREADID *id, unsigned long val)
128 : : {
129 : : memset(id, 0, sizeof(*id));
130 : 0 : id->val = val;
131 : 0 : }
132 : :
133 : : __fips_constseg
134 : : static const unsigned char hash_coeffs[] = { 3, 5, 7, 11, 13, 17, 19, 23 };
135 : 99266768 : void CRYPTO_THREADID_set_pointer(CRYPTO_THREADID *id, void *ptr)
136 : : {
137 : 99266768 : unsigned char *dest = (void *)&id->val;
138 : 99266768 : unsigned int accum = 0;
139 : 99266768 : unsigned char dnum = sizeof(id->val);
140 : :
141 : : memset(id, 0, sizeof(*id));
142 : 99266768 : id->ptr = ptr;
143 : : if (sizeof(id->val) >= sizeof(id->ptr))
144 : : {
145 : : /* 'ptr' can be embedded in 'val' without loss of uniqueness */
146 : 99266768 : id->val = (unsigned long)id->ptr;
147 : 99266768 : return;
148 : : }
149 : : /* hash ptr ==> val. Each byte of 'val' gets the mod-256 total of a
150 : : * linear function over the bytes in 'ptr', the co-efficients of which
151 : : * are a sequence of low-primes (hash_coeffs is an 8-element cycle) -
152 : : * the starting prime for the sequence varies for each byte of 'val'
153 : : * (unique polynomials unless pointers are >64-bit). For added spice,
154 : : * the totals accumulate rather than restarting from zero, and the index
155 : : * of the 'val' byte is added each time (position dependence). If I was
156 : : * a black-belt, I'd scan big-endian pointers in reverse to give
157 : : * low-order bits more play, but this isn't crypto and I'd prefer nobody
158 : : * mistake it as such. Plus I'm lazy. */
159 : : while (dnum--)
160 : : {
161 : : const unsigned char *src = (void *)&id->ptr;
162 : : unsigned char snum = sizeof(id->ptr);
163 : : while (snum--)
164 : : accum += *(src++) * hash_coeffs[(snum + dnum) & 7];
165 : : accum += dnum;
166 : : *(dest++) = accum & 255;
167 : : }
168 : : }
169 : :
170 : 0 : int CRYPTO_THREADID_set_callback(void (*func)(CRYPTO_THREADID *))
171 : : {
172 [ # # ]: 0 : if (threadid_callback)
173 : : return 0;
174 : 0 : threadid_callback = func;
175 : 0 : return 1;
176 : : }
177 : :
178 : 0 : void (*CRYPTO_THREADID_get_callback(void))(CRYPTO_THREADID *)
179 : : {
180 : 0 : return threadid_callback;
181 : : }
182 : :
183 : 99266768 : void CRYPTO_THREADID_current(CRYPTO_THREADID *id)
184 : : {
185 [ - + ]: 99266768 : if (threadid_callback)
186 : : {
187 : 0 : threadid_callback(id);
188 : 0 : return;
189 : : }
190 : : #ifndef OPENSSL_NO_DEPRECATED
191 : : /* If the deprecated callback was set, fall back to that */
192 [ - + ]: 99266768 : if (id_callback)
193 : : {
194 : 0 : CRYPTO_THREADID_set_numeric(id, id_callback());
195 : 0 : return;
196 : : }
197 : : #endif
198 : : /* Else pick a backup */
199 : : #ifdef OPENSSL_SYS_WIN16
200 : : CRYPTO_THREADID_set_numeric(id, (unsigned long)GetCurrentTask());
201 : : #elif defined(OPENSSL_SYS_WIN32)
202 : : CRYPTO_THREADID_set_numeric(id, (unsigned long)GetCurrentThreadId());
203 : : #elif defined(OPENSSL_SYS_BEOS)
204 : : CRYPTO_THREADID_set_numeric(id, (unsigned long)find_thread(NULL));
205 : : #else
206 : : /* For everything else, default to using the address of 'errno' */
207 : 99266768 : CRYPTO_THREADID_set_pointer(id, (void*)&errno);
208 : : #endif
209 : : }
210 : :
211 : 39935129 : int CRYPTO_THREADID_cmp(const CRYPTO_THREADID *a, const CRYPTO_THREADID *b)
212 : : {
213 : 39935129 : return memcmp(a, b, sizeof(*a));
214 : : }
215 : :
216 : 20134137 : void CRYPTO_THREADID_cpy(CRYPTO_THREADID *dest, const CRYPTO_THREADID *src)
217 : : {
218 : : memcpy(dest, src, sizeof(*src));
219 : 20134137 : }
220 : :
221 : 10101920 : unsigned long CRYPTO_THREADID_hash(const CRYPTO_THREADID *id)
222 : : {
223 : 10101920 : return id->val;
224 : : }
225 : :
226 : : #ifndef OPENSSL_NO_DEPRECATED
227 : 0 : unsigned long (*CRYPTO_get_id_callback(void))(void)
228 : : {
229 : 0 : return(id_callback);
230 : : }
231 : :
232 : 0 : void CRYPTO_set_id_callback(unsigned long (*func)(void))
233 : : {
234 : 0 : id_callback=func;
235 : 0 : }
236 : :
237 : 0 : unsigned long CRYPTO_thread_id(void)
238 : : {
239 : 0 : unsigned long ret=0;
240 : :
241 [ # # ]: 0 : if (id_callback == NULL)
242 : : {
243 : : #ifdef OPENSSL_SYS_WIN16
244 : : ret=(unsigned long)GetCurrentTask();
245 : : #elif defined(OPENSSL_SYS_WIN32)
246 : : ret=(unsigned long)GetCurrentThreadId();
247 : : #elif defined(GETPID_IS_MEANINGLESS)
248 : : ret=1L;
249 : : #elif defined(OPENSSL_SYS_BEOS)
250 : : ret=(unsigned long)find_thread(NULL);
251 : : #else
252 : 0 : ret=(unsigned long)getpid();
253 : : #endif
254 : : }
255 : : else
256 : 0 : ret=id_callback();
257 : 0 : return(ret);
258 : : }
259 : : #endif
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