Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame^] | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 2 | * All rights reserved. |
| 3 | * |
| 4 | * This package is an SSL implementation written |
| 5 | * by Eric Young (eay@cryptsoft.com). |
| 6 | * The implementation was written so as to conform with Netscapes SSL. |
| 7 | * |
| 8 | * This library is free for commercial and non-commercial use as long as |
| 9 | * the following conditions are aheared to. The following conditions |
| 10 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 12 | * included with this distribution is covered by the same copyright terms |
| 13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 14 | * |
| 15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 16 | * the code are not to be removed. |
| 17 | * If this package is used in a product, Eric Young should be given attribution |
| 18 | * as the author of the parts of the library used. |
| 19 | * This can be in the form of a textual message at program startup or |
| 20 | * in documentation (online or textual) provided with the package. |
| 21 | * |
| 22 | * Redistribution and use in source and binary forms, with or without |
| 23 | * modification, are permitted provided that the following conditions |
| 24 | * are met: |
| 25 | * 1. Redistributions of source code must retain the copyright |
| 26 | * notice, this list of conditions and the following disclaimer. |
| 27 | * 2. Redistributions in binary form must reproduce the above copyright |
| 28 | * notice, this list of conditions and the following disclaimer in the |
| 29 | * documentation and/or other materials provided with the distribution. |
| 30 | * 3. All advertising materials mentioning features or use of this software |
| 31 | * must display the following acknowledgement: |
| 32 | * "This product includes cryptographic software written by |
| 33 | * Eric Young (eay@cryptsoft.com)" |
| 34 | * The word 'cryptographic' can be left out if the rouines from the library |
| 35 | * being used are not cryptographic related :-). |
| 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 37 | * the apps directory (application code) you must include an acknowledgement: |
| 38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 39 | * |
| 40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 50 | * SUCH DAMAGE. |
| 51 | * |
| 52 | * The licence and distribution terms for any publically available version or |
| 53 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 54 | * copied and put under another distribution licence |
| 55 | * [including the GNU Public Licence.] */ |
| 56 | |
| 57 | #include <openssl/thread.h> |
| 58 | |
| 59 | #include <errno.h> |
| 60 | #include <string.h> |
| 61 | |
| 62 | #if defined(OPENSSL_WINDOWS) |
| 63 | #pragma warning(push, 3) |
| 64 | #include <Windows.h> |
| 65 | #pragma warning(pop) |
| 66 | #endif |
| 67 | |
| 68 | #include <openssl/mem.h> |
| 69 | #include <openssl/type_check.h> |
| 70 | |
| 71 | |
| 72 | /* lock_names contains the names of all the locks defined in thread.h. */ |
| 73 | static const char *const lock_names[] = { |
| 74 | "<<ERROR>>", "err", "ex_data", "x509", |
| 75 | "x509_info", "x509_pkey", "x509_crl", "x509_req", |
| 76 | "dsa", "rsa", "evp_pkey", "x509_store", |
| 77 | "ssl_ctx", "ssl_cert", "ssl_session", "ssl_sess_cert", |
| 78 | "ssl", "ssl_method", "rand", "rand2", |
| 79 | "debug_malloc", "BIO", "gethostbyname", "getservbyname", |
| 80 | "readdir", "RSA_blinding", "dh", "debug_malloc2", |
| 81 | "dso", "dynlock", "engine", "ui", |
| 82 | "ecdsa", "ec", "ecdh", "bn", |
| 83 | "ec_pre_comp", "store", "comp", "fips", |
| 84 | "fips2", "obj", |
| 85 | }; |
| 86 | |
| 87 | OPENSSL_COMPILE_ASSERT(CRYPTO_NUM_LOCKS == |
| 88 | sizeof(lock_names) / sizeof(lock_names[0]), |
| 89 | CRYPTO_NUM_LOCKS_inconsistent); |
| 90 | |
| 91 | static void (*locking_callback)(int mode, int lock_num, const char *file, |
| 92 | int line) = 0; |
| 93 | static int (*add_lock_callback)(int *pointer, int amount, int lock_num, |
| 94 | const char *file, int line) = 0; |
| 95 | static void (*threadid_callback)(CRYPTO_THREADID *) = 0; |
| 96 | |
| 97 | |
| 98 | int CRYPTO_num_locks(void) { return CRYPTO_NUM_LOCKS; } |
| 99 | |
| 100 | void CRYPTO_set_locking_callback(void (*func)(int mode, int lock_num, |
| 101 | const char *file, int line)) { |
| 102 | locking_callback = func; |
| 103 | } |
| 104 | |
| 105 | void CRYPTO_set_add_lock_callback(int (*func)(int *num, int mount, int lock_num, |
| 106 | const char *file, int line)) { |
| 107 | add_lock_callback = func; |
| 108 | } |
| 109 | |
| 110 | const char *CRYPTO_get_lock_name(int lock_num) { |
| 111 | if (lock_num >= 0 && lock_num < CRYPTO_NUM_LOCKS) { |
| 112 | return lock_names[lock_num]; |
| 113 | } else { |
| 114 | return "ERROR"; |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | int CRYPTO_THREADID_set_callback(void (*func)(CRYPTO_THREADID *)) { |
| 119 | if (threadid_callback) { |
| 120 | return 0; |
| 121 | } |
| 122 | threadid_callback = func; |
| 123 | return 1; |
| 124 | } |
| 125 | |
| 126 | void CRYPTO_THREADID_set_numeric(CRYPTO_THREADID *id, unsigned long val) { |
| 127 | memset(id, 0, sizeof(*id)); |
| 128 | id->val = val; |
| 129 | } |
| 130 | |
| 131 | void CRYPTO_THREADID_set_pointer(CRYPTO_THREADID *id, void *ptr) { |
| 132 | memset(id, 0, sizeof(*id)); |
| 133 | id->ptr = ptr; |
| 134 | } |
| 135 | |
| 136 | void (*CRYPTO_get_locking_callback(void))(int mode, int lock_num, |
| 137 | const char *file, int line) { |
| 138 | return locking_callback; |
| 139 | } |
| 140 | |
| 141 | int (*CRYPTO_get_add_lock_callback(void))(int *num, int mount, int lock_num, |
| 142 | const char *file, int line) { |
| 143 | return add_lock_callback; |
| 144 | } |
| 145 | |
| 146 | void CRYPTO_lock(int mode, int lock_num, const char *file, int line) { |
| 147 | if (locking_callback != NULL) { |
| 148 | locking_callback(mode, lock_num, file, line); |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | int CRYPTO_add_lock(int *pointer, int amount, int lock_num, const char *file, |
| 153 | int line) { |
| 154 | int ret = 0; |
| 155 | |
| 156 | if (add_lock_callback != NULL) { |
| 157 | ret = add_lock_callback(pointer, amount, lock_num, file, line); |
| 158 | } else { |
| 159 | CRYPTO_lock(CRYPTO_LOCK | CRYPTO_WRITE, lock_num, file, line); |
| 160 | ret = *pointer + amount; |
| 161 | *pointer = ret; |
| 162 | CRYPTO_lock(CRYPTO_UNLOCK | CRYPTO_WRITE, lock_num, file, line); |
| 163 | } |
| 164 | |
| 165 | return ret; |
| 166 | } |
| 167 | |
| 168 | void CRYPTO_THREADID_current(CRYPTO_THREADID *id) { |
| 169 | if (threadid_callback) { |
| 170 | threadid_callback(id); |
| 171 | return; |
| 172 | } |
| 173 | |
| 174 | #if defined(OPENSSL_WINDOWS) |
| 175 | CRYPTO_THREADID_set_numeric(id, (unsigned long)GetCurrentThreadId()); |
| 176 | #else |
| 177 | /* For everything else, default to using the address of 'errno' */ |
| 178 | CRYPTO_THREADID_set_pointer(id, (void *)&errno); |
| 179 | #endif |
| 180 | } |
| 181 | |
| 182 | int CRYPTO_THREADID_cmp(const CRYPTO_THREADID *a, const CRYPTO_THREADID *b) { |
| 183 | return memcmp(a, b, sizeof(*a)); |
| 184 | } |
| 185 | |
| 186 | void CRYPTO_THREADID_cpy(CRYPTO_THREADID *dest, const CRYPTO_THREADID *src) { |
| 187 | memcpy(dest, src, sizeof(*src)); |
| 188 | } |
| 189 | |
| 190 | uint32_t CRYPTO_THREADID_hash(const CRYPTO_THREADID *id) { |
| 191 | return OPENSSL_hash32(id, sizeof(CRYPTO_THREADID)); |
| 192 | } |
| 193 | |
| 194 | void CRYPTO_set_id_callback(unsigned long (*func)(void)) {} |
| 195 | |
| 196 | void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *( |
| 197 | *dyn_create_function)(const char *file, int line)) {} |
| 198 | |
| 199 | void CRYPTO_set_dynlock_lock_callback(void (*dyn_lock_function)( |
| 200 | int mode, struct CRYPTO_dynlock_value *l, const char *file, int line)) {} |
| 201 | |
| 202 | void CRYPTO_set_dynlock_destroy_callback(void (*dyn_destroy_function)( |
| 203 | struct CRYPTO_dynlock_value *l, const char *file, int line)) {} |