1 /* ====================================================================
2 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
16 * 3. All advertising materials mentioning features or use of this
17 * software must display the following acknowledgment:
18 * "This product includes software developed by the OpenSSL Project
19 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22 * endorse or promote products derived from this software without
23 * prior written permission. For written permission, please contact
24 * openssl-core@openssl.org.
26 * 5. Products derived from this software may not be called "OpenSSL"
27 * nor may "OpenSSL" appear in their names without prior written
28 * permission of the OpenSSL Project.
30 * 6. Redistributions of any form whatsoever must retain the following
32 * "This product includes software developed by the OpenSSL Project
33 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46 * OF THE POSSIBILITY OF SUCH DAMAGE.
47 * ====================================================================
49 * This product includes cryptographic software written by Eric Young
50 * (eay@cryptsoft.com). This product includes software written by Tim
51 * Hudson (tjh@cryptsoft.com).
54 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
55 * All rights reserved.
57 * This package is an SSL implementation written
58 * by Eric Young (eay@cryptsoft.com).
59 * The implementation was written so as to conform with Netscapes SSL.
61 * This library is free for commercial and non-commercial use as long as
62 * the following conditions are aheared to. The following conditions
63 * apply to all code found in this distribution, be it the RC4, RSA,
64 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
65 * included with this distribution is covered by the same copyright terms
66 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
68 * Copyright remains Eric Young's, and as such any Copyright notices in
69 * the code are not to be removed.
70 * If this package is used in a product, Eric Young should be given attribution
71 * as the author of the parts of the library used.
72 * This can be in the form of a textual message at program startup or
73 * in documentation (online or textual) provided with the package.
75 * Redistribution and use in source and binary forms, with or without
76 * modification, are permitted provided that the following conditions
78 * 1. Redistributions of source code must retain the copyright
79 * notice, this list of conditions and the following disclaimer.
80 * 2. Redistributions in binary form must reproduce the above copyright
81 * notice, this list of conditions and the following disclaimer in the
82 * documentation and/or other materials provided with the distribution.
83 * 3. All advertising materials mentioning features or use of this software
84 * must display the following acknowledgement:
85 * "This product includes cryptographic software written by
86 * Eric Young (eay@cryptsoft.com)"
87 * The word 'cryptographic' can be left out if the rouines from the library
88 * being used are not cryptographic related :-).
89 * 4. If you include any Windows specific code (or a derivative thereof) from
90 * the apps directory (application code) you must include an acknowledgement:
91 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
93 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
94 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
95 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
96 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
97 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
98 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
99 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
101 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
102 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
105 * The licence and distribution terms for any publically available version or
106 * derivative of this code cannot be changed. i.e. this code cannot simply be
107 * copied and put under another distribution licence
108 * [including the GNU Public Licence.]
110 /* ====================================================================
111 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
112 * ECDH support in OpenSSL originally developed by
113 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
116 #include "internal/cryptlib.h"
117 #include <openssl/opensslconf.h>
119 #if OPENSSL_API_COMPAT < 0x10000000L
120 static unsigned long (*id_callback) (void) = 0;
122 static void (*threadid_callback) (CRYPTO_THREADID *) = 0;
125 * the memset() here and in set_pointer() seem overkill, but for the sake of
126 * CRYPTO_THREADID_cmp() this avoids any platform silliness that might cause
127 * two "equal" THREADID structs to not be memcmp()-identical.
129 void CRYPTO_THREADID_set_numeric(CRYPTO_THREADID *id, unsigned long val)
131 memset(id, 0, sizeof(*id));
135 static const unsigned char hash_coeffs[] = { 3, 5, 7, 11, 13, 17, 19, 23 };
137 void CRYPTO_THREADID_set_pointer(CRYPTO_THREADID *id, void *ptr)
139 unsigned char *dest = (void *)&id->val;
140 unsigned int accum = 0;
141 unsigned char dnum = sizeof(id->val);
143 memset(id, 0, sizeof(*id));
145 if (sizeof(id->val) >= sizeof(id->ptr)) {
147 * 'ptr' can be embedded in 'val' without loss of uniqueness
149 id->val = (size_t)id->ptr;
153 * hash ptr ==> val. Each byte of 'val' gets the mod-256 total of a
154 * linear function over the bytes in 'ptr', the co-efficients of which
155 * are a sequence of low-primes (hash_coeffs is an 8-element cycle) - the
156 * starting prime for the sequence varies for each byte of 'val' (unique
157 * polynomials unless pointers are >64-bit). For added spice, the totals
158 * accumulate rather than restarting from zero, and the index of the
159 * 'val' byte is added each time (position dependence). If I was a
160 * black-belt, I'd scan big-endian pointers in reverse to give low-order
161 * bits more play, but this isn't crypto and I'd prefer nobody mistake it
162 * as such. Plus I'm lazy.
165 const unsigned char *src = (void *)&id->ptr;
166 unsigned char snum = sizeof(id->ptr);
168 accum += *(src++) * hash_coeffs[(snum + dnum) & 7];
170 *(dest++) = accum & 255;
174 int CRYPTO_THREADID_set_callback(void (*func) (CRYPTO_THREADID *))
176 if (threadid_callback)
178 threadid_callback = func;
182 void (*CRYPTO_THREADID_get_callback(void)) (CRYPTO_THREADID *) {
183 return threadid_callback;
186 void CRYPTO_THREADID_current(CRYPTO_THREADID *id)
188 if (threadid_callback) {
189 threadid_callback(id);
192 #if OPENSSL_API_COMPAT < 0x10000000L
193 /* If the deprecated callback was set, fall back to that */
195 CRYPTO_THREADID_set_numeric(id, id_callback());
199 /* Else pick a backup */
200 #if defined(OPENSSL_SYS_WIN32)
201 CRYPTO_THREADID_set_numeric(id, (unsigned long)GetCurrentThreadId());
203 /* For everything else, default to using the address of 'errno' */
204 CRYPTO_THREADID_set_pointer(id, (void *)&errno);
208 int CRYPTO_THREADID_cmp(const CRYPTO_THREADID *a, const CRYPTO_THREADID *b)
210 return memcmp(a, b, sizeof(*a));
213 void CRYPTO_THREADID_cpy(CRYPTO_THREADID *dest, const CRYPTO_THREADID *src)
215 memcpy(dest, src, sizeof(*src));
218 unsigned long CRYPTO_THREADID_hash(const CRYPTO_THREADID *id)
223 #if OPENSSL_API_COMPAT < 0x10000000L
224 unsigned long (*CRYPTO_get_id_callback(void)) (void) {
225 return (id_callback);
228 void CRYPTO_set_id_callback(unsigned long (*func) (void))
233 unsigned long CRYPTO_thread_id(void)
235 unsigned long ret = 0;
237 if (id_callback == NULL) {
238 # if defined(OPENSSL_SYS_WIN32)
239 ret = (unsigned long)GetCurrentThreadId();
240 # elif defined(GETPID_IS_MEANINGLESS)
243 ret = (unsigned long)getpid();