| /* crypto/mem.c */ |
| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <openssl/crypto.h> |
| #include "cryptlib.h" |
| |
| static int allow_customize = 1; /* we provide flexible functions for */ |
| static int allow_customize_debug = 1; /* exchanging memory-related functions |
| * at run-time, but this must be done |
| * before any blocks are actually |
| * allocated; or we'll run into huge |
| * problems when malloc/free pairs |
| * don't match etc. */ |
| |
| /* |
| * the following pointers may be changed as long as 'allow_customize' is set |
| */ |
| |
| static void *(*malloc_func) (size_t) = malloc; |
| static void *default_malloc_ex(size_t num, const char *file, int line) |
| { |
| return malloc_func(num); |
| } |
| |
| static void *(*malloc_ex_func) (size_t, const char *file, int line) |
| = default_malloc_ex; |
| |
| static void *(*realloc_func) (void *, size_t) = realloc; |
| static void *default_realloc_ex(void *str, size_t num, |
| const char *file, int line) |
| { |
| return realloc_func(str, num); |
| } |
| |
| static void *(*realloc_ex_func) (void *, size_t, const char *file, int line) |
| = default_realloc_ex; |
| |
| static void (*free_func) (void *) = free; |
| |
| static void *(*malloc_locked_func) (size_t) = malloc; |
| static void *default_malloc_locked_ex(size_t num, const char *file, int line) |
| { |
| return malloc_locked_func(num); |
| } |
| |
| static void *(*malloc_locked_ex_func) (size_t, const char *file, int line) |
| = default_malloc_locked_ex; |
| |
| static void (*free_locked_func) (void *) = free; |
| |
| /* may be changed as long as 'allow_customize_debug' is set */ |
| /* XXX use correct function pointer types */ |
| #ifdef CRYPTO_MDEBUG |
| /* use default functions from mem_dbg.c */ |
| static void (*malloc_debug_func) (void *, int, const char *, int, int) |
| = CRYPTO_dbg_malloc; |
| static void (*realloc_debug_func) (void *, void *, int, const char *, int, |
| int) |
| = CRYPTO_dbg_realloc; |
| static void (*free_debug_func) (void *, int) = CRYPTO_dbg_free; |
| static void (*set_debug_options_func) (long) = CRYPTO_dbg_set_options; |
| static long (*get_debug_options_func) (void) = CRYPTO_dbg_get_options; |
| #else |
| /* |
| * applications can use CRYPTO_malloc_debug_init() to select above case at |
| * run-time |
| */ |
| static void (*malloc_debug_func) (void *, int, const char *, int, int) = NULL; |
| static void (*realloc_debug_func) (void *, void *, int, const char *, int, |
| int) |
| = NULL; |
| static void (*free_debug_func) (void *, int) = NULL; |
| static void (*set_debug_options_func) (long) = NULL; |
| static long (*get_debug_options_func) (void) = NULL; |
| #endif |
| |
| int CRYPTO_set_mem_functions(void *(*m) (size_t), void *(*r) (void *, size_t), |
| void (*f) (void *)) |
| { |
| /* Dummy call just to ensure OPENSSL_init() gets linked in */ |
| OPENSSL_init(); |
| if (!allow_customize) |
| return 0; |
| if ((m == 0) || (r == 0) || (f == 0)) |
| return 0; |
| malloc_func = m; |
| malloc_ex_func = default_malloc_ex; |
| realloc_func = r; |
| realloc_ex_func = default_realloc_ex; |
| free_func = f; |
| malloc_locked_func = m; |
| malloc_locked_ex_func = default_malloc_locked_ex; |
| free_locked_func = f; |
| return 1; |
| } |
| |
| int CRYPTO_set_mem_ex_functions(void *(*m) (size_t, const char *, int), |
| void *(*r) (void *, size_t, const char *, |
| int), void (*f) (void *)) |
| { |
| if (!allow_customize) |
| return 0; |
| if ((m == 0) || (r == 0) || (f == 0)) |
| return 0; |
| malloc_func = 0; |
| malloc_ex_func = m; |
| realloc_func = 0; |
| realloc_ex_func = r; |
| free_func = f; |
| malloc_locked_func = 0; |
| malloc_locked_ex_func = m; |
| free_locked_func = f; |
| return 1; |
| } |
| |
| int CRYPTO_set_locked_mem_functions(void *(*m) (size_t), void (*f) (void *)) |
| { |
| if (!allow_customize) |
| return 0; |
| if ((m == NULL) || (f == NULL)) |
| return 0; |
| malloc_locked_func = m; |
| malloc_locked_ex_func = default_malloc_locked_ex; |
| free_locked_func = f; |
| return 1; |
| } |
| |
| int CRYPTO_set_locked_mem_ex_functions(void *(*m) (size_t, const char *, int), |
| void (*f) (void *)) |
| { |
| if (!allow_customize) |
| return 0; |
| if ((m == NULL) || (f == NULL)) |
| return 0; |
| malloc_locked_func = 0; |
| malloc_locked_ex_func = m; |
| free_func = f; |
| return 1; |
| } |
| |
| int CRYPTO_set_mem_debug_functions(void (*m) |
| (void *, int, const char *, int, int), |
| void (*r) (void *, void *, int, |
| const char *, int, int), |
| void (*f) (void *, int), void (*so) (long), |
| long (*go) (void)) |
| { |
| if (!allow_customize_debug) |
| return 0; |
| malloc_debug_func = m; |
| realloc_debug_func = r; |
| free_debug_func = f; |
| set_debug_options_func = so; |
| get_debug_options_func = go; |
| return 1; |
| } |
| |
| void CRYPTO_get_mem_functions(void *(**m) (size_t), |
| void *(**r) (void *, size_t), |
| void (**f) (void *)) |
| { |
| if (m != NULL) |
| *m = (malloc_ex_func == default_malloc_ex) ? malloc_func : 0; |
| if (r != NULL) |
| *r = (realloc_ex_func == default_realloc_ex) ? realloc_func : 0; |
| if (f != NULL) |
| *f = free_func; |
| } |
| |
| void CRYPTO_get_mem_ex_functions(void *(**m) (size_t, const char *, int), |
| void *(**r) (void *, size_t, const char *, |
| int), void (**f) (void *)) |
| { |
| if (m != NULL) |
| *m = (malloc_ex_func != default_malloc_ex) ? malloc_ex_func : 0; |
| if (r != NULL) |
| *r = (realloc_ex_func != default_realloc_ex) ? realloc_ex_func : 0; |
| if (f != NULL) |
| *f = free_func; |
| } |
| |
| void CRYPTO_get_locked_mem_functions(void *(**m) (size_t), |
| void (**f) (void *)) |
| { |
| if (m != NULL) |
| *m = (malloc_locked_ex_func == default_malloc_locked_ex) ? |
| malloc_locked_func : 0; |
| if (f != NULL) |
| *f = free_locked_func; |
| } |
| |
| void CRYPTO_get_locked_mem_ex_functions(void |
| *(**m) (size_t, const char *, int), |
| void (**f) (void *)) |
| { |
| if (m != NULL) |
| *m = (malloc_locked_ex_func != default_malloc_locked_ex) ? |
| malloc_locked_ex_func : 0; |
| if (f != NULL) |
| *f = free_locked_func; |
| } |
| |
| void CRYPTO_get_mem_debug_functions(void (**m) |
| (void *, int, const char *, int, int), |
| void (**r) (void *, void *, int, |
| const char *, int, int), |
| void (**f) (void *, int), |
| void (**so) (long), long (**go) (void)) |
| { |
| if (m != NULL) |
| *m = malloc_debug_func; |
| if (r != NULL) |
| *r = realloc_debug_func; |
| if (f != NULL) |
| *f = free_debug_func; |
| if (so != NULL) |
| *so = set_debug_options_func; |
| if (go != NULL) |
| *go = get_debug_options_func; |
| } |
| |
| void *CRYPTO_malloc_locked(int num, const char *file, int line) |
| { |
| void *ret = NULL; |
| |
| if (num <= 0) |
| return NULL; |
| |
| if (allow_customize) |
| allow_customize = 0; |
| if (malloc_debug_func != NULL) { |
| if (allow_customize_debug) |
| allow_customize_debug = 0; |
| malloc_debug_func(NULL, num, file, line, 0); |
| } |
| ret = malloc_locked_ex_func(num, file, line); |
| #ifdef LEVITTE_DEBUG_MEM |
| fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num); |
| #endif |
| if (malloc_debug_func != NULL) |
| malloc_debug_func(ret, num, file, line, 1); |
| |
| #ifndef OPENSSL_CPUID_OBJ |
| /* |
| * Create a dependency on the value of 'cleanse_ctr' so our memory |
| * sanitisation function can't be optimised out. NB: We only do this for |
| * >2Kb so the overhead doesn't bother us. |
| */ |
| if (ret && (num > 2048)) { |
| extern unsigned char cleanse_ctr; |
| ((unsigned char *)ret)[0] = cleanse_ctr; |
| } |
| #endif |
| |
| return ret; |
| } |
| |
| void CRYPTO_free_locked(void *str) |
| { |
| if (free_debug_func != NULL) |
| free_debug_func(str, 0); |
| #ifdef LEVITTE_DEBUG_MEM |
| fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str); |
| #endif |
| free_locked_func(str); |
| if (free_debug_func != NULL) |
| free_debug_func(NULL, 1); |
| } |
| |
| void *CRYPTO_malloc(int num, const char *file, int line) |
| { |
| void *ret = NULL; |
| |
| if (num <= 0) |
| return NULL; |
| |
| if (allow_customize) |
| allow_customize = 0; |
| if (malloc_debug_func != NULL) { |
| if (allow_customize_debug) |
| allow_customize_debug = 0; |
| malloc_debug_func(NULL, num, file, line, 0); |
| } |
| ret = malloc_ex_func(num, file, line); |
| #ifdef LEVITTE_DEBUG_MEM |
| fprintf(stderr, "LEVITTE_DEBUG_MEM: > 0x%p (%d)\n", ret, num); |
| #endif |
| if (malloc_debug_func != NULL) |
| malloc_debug_func(ret, num, file, line, 1); |
| |
| #ifndef OPENSSL_CPUID_OBJ |
| /* |
| * Create a dependency on the value of 'cleanse_ctr' so our memory |
| * sanitisation function can't be optimised out. NB: We only do this for |
| * >2Kb so the overhead doesn't bother us. |
| */ |
| if (ret && (num > 2048)) { |
| extern unsigned char cleanse_ctr; |
| ((unsigned char *)ret)[0] = cleanse_ctr; |
| } |
| #endif |
| |
| return ret; |
| } |
| |
| char *CRYPTO_strdup(const char *str, const char *file, int line) |
| { |
| char *ret = CRYPTO_malloc(strlen(str) + 1, file, line); |
| |
| if (ret == NULL) |
| return NULL; |
| |
| strcpy(ret, str); |
| return ret; |
| } |
| |
| void *CRYPTO_realloc(void *str, int num, const char *file, int line) |
| { |
| void *ret = NULL; |
| |
| if (str == NULL) |
| return CRYPTO_malloc(num, file, line); |
| |
| if (num <= 0) |
| return NULL; |
| |
| if (realloc_debug_func != NULL) |
| realloc_debug_func(str, NULL, num, file, line, 0); |
| ret = realloc_ex_func(str, num, file, line); |
| #ifdef LEVITTE_DEBUG_MEM |
| fprintf(stderr, "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n", str, |
| ret, num); |
| #endif |
| if (realloc_debug_func != NULL) |
| realloc_debug_func(str, ret, num, file, line, 1); |
| |
| return ret; |
| } |
| |
| void *CRYPTO_realloc_clean(void *str, int old_len, int num, const char *file, |
| int line) |
| { |
| void *ret = NULL; |
| |
| if (str == NULL) |
| return CRYPTO_malloc(num, file, line); |
| |
| if (num <= 0) |
| return NULL; |
| |
| /* |
| * We don't support shrinking the buffer. Note the memcpy that copies |
| * |old_len| bytes to the new buffer, below. |
| */ |
| if (num < old_len) |
| return NULL; |
| |
| if (realloc_debug_func != NULL) |
| realloc_debug_func(str, NULL, num, file, line, 0); |
| ret = malloc_ex_func(num, file, line); |
| if (ret) { |
| memcpy(ret, str, old_len); |
| OPENSSL_clear_free(str, old_len); |
| } |
| #ifdef LEVITTE_DEBUG_MEM |
| fprintf(stderr, |
| "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n", |
| str, ret, num); |
| #endif |
| if (realloc_debug_func != NULL) |
| realloc_debug_func(str, ret, num, file, line, 1); |
| |
| return ret; |
| } |
| |
| void CRYPTO_free(void *str) |
| { |
| if (free_debug_func != NULL) |
| free_debug_func(str, 0); |
| #ifdef LEVITTE_DEBUG_MEM |
| fprintf(stderr, "LEVITTE_DEBUG_MEM: < 0x%p\n", str); |
| #endif |
| free_func(str); |
| if (free_debug_func != NULL) |
| free_debug_func(NULL, 1); |
| } |
| |
| void CRYPTO_clear_free(void *str, size_t num) |
| { |
| if (!str) |
| return; |
| if (num) |
| OPENSSL_cleanse(str, num); |
| CRYPTO_free(str); |
| } |
| |
| void *CRYPTO_remalloc(void *a, int num, const char *file, int line) |
| { |
| if (a != NULL) |
| OPENSSL_free(a); |
| a = OPENSSL_malloc(num); |
| return (a); |
| } |
| |
| void CRYPTO_set_mem_debug_options(long bits) |
| { |
| if (set_debug_options_func != NULL) |
| set_debug_options_func(bits); |
| } |
| |
| long CRYPTO_get_mem_debug_options(void) |
| { |
| if (get_debug_options_func != NULL) |
| return get_debug_options_func(); |
| return 0; |
| } |
