1 /* crypto/cryptlib.c */
2 /* ====================================================================
3 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
31 * 6. Redistributions of any form whatsoever must retain the following
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
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).
55 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
56 * All rights reserved.
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.
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).
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.
76 * Redistribution and use in source and binary forms, with or without
77 * modification, are permitted provided that the following conditions
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)"
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
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.]
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.
117 #include "internal/cryptlib.h"
118 #include <openssl/opensslconf.h>
120 #if OPENSSL_API_COMPAT < 0x10000000L
121 static unsigned long (*id_callback) (void) = 0;
123 static void (*threadid_callback) (CRYPTO_THREADID *) = 0;
126 * the memset() here and in set_pointer() seem overkill, but for the sake of
127 * CRYPTO_THREADID_cmp() this avoids any platform silliness that might cause
128 * two "equal" THREADID structs to not be memcmp()-identical.
130 void CRYPTO_THREADID_set_numeric(CRYPTO_THREADID *id, unsigned long val)
132 memset(id, 0, sizeof(*id));
136 static const unsigned char hash_coeffs[] = { 3, 5, 7, 11, 13, 17, 19, 23 };
138 void CRYPTO_THREADID_set_pointer(CRYPTO_THREADID *id, void *ptr)
140 unsigned char *dest = (void *)&id->val;
141 unsigned int accum = 0;
142 unsigned char dnum = sizeof(id->val);
144 memset(id, 0, sizeof(*id));
146 if (sizeof(id->val) >= sizeof(id->ptr)) {
148 * 'ptr' can be embedded in 'val' without loss of uniqueness
150 id->val = (size_t)id->ptr;
154 * hash ptr ==> val. Each byte of 'val' gets the mod-256 total of a
155 * linear function over the bytes in 'ptr', the co-efficients of which
156 * are a sequence of low-primes (hash_coeffs is an 8-element cycle) - the
157 * starting prime for the sequence varies for each byte of 'val' (unique
158 * polynomials unless pointers are >64-bit). For added spice, the totals
159 * accumulate rather than restarting from zero, and the index of the
160 * 'val' byte is added each time (position dependence). If I was a
161 * black-belt, I'd scan big-endian pointers in reverse to give low-order
162 * bits more play, but this isn't crypto and I'd prefer nobody mistake it
163 * as such. Plus I'm lazy.
166 const unsigned char *src = (void *)&id->ptr;
167 unsigned char snum = sizeof(id->ptr);
169 accum += *(src++) * hash_coeffs[(snum + dnum) & 7];
171 *(dest++) = accum & 255;
175 int CRYPTO_THREADID_set_callback(void (*func) (CRYPTO_THREADID *))
177 if (threadid_callback)
179 threadid_callback = func;
183 void (*CRYPTO_THREADID_get_callback(void)) (CRYPTO_THREADID *) {
184 return threadid_callback;
187 void CRYPTO_THREADID_current(CRYPTO_THREADID *id)
189 if (threadid_callback) {
190 threadid_callback(id);
193 #if OPENSSL_API_COMPAT < 0x10000000L
194 /* If the deprecated callback was set, fall back to that */
196 CRYPTO_THREADID_set_numeric(id, id_callback());
200 /* Else pick a backup */
201 #if defined(OPENSSL_SYS_WIN32)
202 CRYPTO_THREADID_set_numeric(id, (unsigned long)GetCurrentThreadId());
204 /* For everything else, default to using the address of 'errno' */
205 CRYPTO_THREADID_set_pointer(id, (void *)&errno);
209 int CRYPTO_THREADID_cmp(const CRYPTO_THREADID *a, const CRYPTO_THREADID *b)
211 return memcmp(a, b, sizeof(*a));
214 void CRYPTO_THREADID_cpy(CRYPTO_THREADID *dest, const CRYPTO_THREADID *src)
216 memcpy(dest, src, sizeof(*src));
219 unsigned long CRYPTO_THREADID_hash(const CRYPTO_THREADID *id)
224 #if OPENSSL_API_COMPAT < 0x10000000L
225 unsigned long (*CRYPTO_get_id_callback(void)) (void) {
226 return (id_callback);
229 void CRYPTO_set_id_callback(unsigned long (*func) (void))
234 unsigned long CRYPTO_thread_id(void)
236 unsigned long ret = 0;
238 if (id_callback == NULL) {
239 # if defined(OPENSSL_SYS_WIN32)
240 ret = (unsigned long)GetCurrentThreadId();
241 # elif defined(GETPID_IS_MEANINGLESS)
244 ret = (unsigned long)getpid();