-/* 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:
* 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
+ * 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
* 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
#include <stdio.h>
#include <stdlib.h>
+#include <limits.h>
#include <openssl/crypto.h>
-#include "cryptlib.h"
-
-
-static char *(*malloc_locked_func)()=(char *(*)())malloc;
-static void (*free_locked_func)()=(void (*)())free;
-static char *(*malloc_func)()= (char *(*)())malloc;
-static char *(*realloc_func)()= (char *(*)())realloc;
-static void (*free_func)()= (void (*)())free;
-
-static void (*malloc_debug_func)()= (void (*)())CRYPTO_dbg_malloc;
-static void (*realloc_debug_func)()= (void (*)())CRYPTO_dbg_realloc;
-static void (*free_debug_func)()= (void (*)())CRYPTO_dbg_free;
-static void (*set_debug_options_func)()= (void (*)())CRYPTO_dbg_set_options;
-static int (*get_debug_options_func)()= (int (*)())CRYPTO_dbg_get_options;
-
-void CRYPTO_set_mem_functions(char *(*m)(), char *(*r)(), void (*f)())
- {
- if ((m == NULL) || (r == NULL) || (f == NULL)) return;
- malloc_func=m;
- realloc_func=r;
- free_func=f;
- malloc_locked_func=m;
- free_locked_func=f;
- }
-
-void CRYPTO_set_mem_debug_functions(void (*m)(), void (*r)(), void (*f)(),void (*so)(),int (*go)())
- {
- if ((m == NULL) || (r == NULL) || (f == NULL) || (so == NULL) || (go == NULL))
- return;
- malloc_debug_func=m;
- realloc_debug_func=r;
- free_debug_func=f;
- set_debug_options_func=so;
- get_debug_options_func=go;
- }
-
-void CRYPTO_set_locked_mem_functions(char *(*m)(), void (*f)())
- {
- if ((m == NULL) || (f == NULL)) return;
- malloc_locked_func=m;
- free_locked_func=f;
- }
-
-void CRYPTO_get_mem_functions(char *(**m)(), char *(**r)(), void (**f)())
- {
- if (m != NULL) *m=malloc_func;
- if (r != NULL) *r=realloc_func;
- if (f != NULL) *f=free_func;
- }
-
-void CRYPTO_get_mem_debug_functions(void (**m)(), void (**r)(), void (**f)(),void (**so)(),int (**go)())
- {
- 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_get_locked_mem_functions(char *(**m)(), void (**f)())
- {
- if (m != NULL) *m=malloc_locked_func;
- if (f != NULL) *f=free_locked_func;
- }
-
-void *CRYPTO_malloc_locked(int num, char *file, int line)
- {
- char *ret = NULL;
-
- malloc_debug_func(NULL, num, file, line, 0);
- ret = malloc_locked_func(num);
-#ifdef LEVITTE_DEBUG
- fprintf(stderr, "LEVITTE_DEBUG: > 0x%p (%d)\n", ret, num);
-#endif
- malloc_debug_func(ret, num, file, line, 1);
-
- return ret;
- }
+#include "internal/cryptlib.h"
-void CRYPTO_free_locked(void *str)
- {
- free_debug_func(str, 0);
-#ifdef LEVITTE_DEBUG
- fprintf(stderr, "LEVITTE_DEBUG: < 0x%p\n", str);
-#endif
- free_locked_func(str);
- free_debug_func(NULL, 1);
- }
-
-void *CRYPTO_malloc(int num, char *file, int line)
- {
- char *ret = NULL;
-
- malloc_debug_func(NULL, num, file, line, 0);
- ret = malloc_func(num);
-#ifdef LEVITTE_DEBUG
- fprintf(stderr, "LEVITTE_DEBUG: > 0x%p (%d)\n", ret, num);
+/*
+ * the following pointers may be changed as long as 'allow_customize' is set
+ */
+static int allow_customize = 1;
+
+static void *(*malloc_impl)(size_t, const char *, int)
+ = CRYPTO_malloc;
+static void *(*realloc_impl)(void *, size_t, const char *, int)
+ = CRYPTO_realloc;
+static void (*free_impl)(void *, const char *, int)
+ = CRYPTO_free;
+
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG
+static int call_malloc_debug = 1;
+#else
+static int call_malloc_debug = 0;
#endif
- malloc_debug_func(ret, num, file, line, 1);
-
- return ret;
- }
-void *CRYPTO_realloc(void *str, int num, char *file, int line)
- {
- char *ret = NULL;
-
- realloc_debug_func(str, NULL, num, file, line, 0);
- ret = realloc_func(str,num);
-#ifdef LEVITTE_DEBUG
- fprintf(stderr, "LEVITTE_DEBUG: | 0x%p -> 0x%p (%d)\n", str, ret, num);
+int CRYPTO_set_mem_functions(
+ void *(*m)(size_t, const char *, int),
+ void *(*r)(void *, size_t, const char *, int),
+ void (*f)(void *, const char *, int))
+{
+ if (!allow_customize)
+ return 0;
+ if (m)
+ malloc_impl = m;
+ if (r)
+ realloc_impl = r;
+ if (f)
+ free_impl = f;
+ return 1;
+}
+
+int CRYPTO_set_mem_debug(int flag)
+{
+ if (!allow_customize)
+ return 0;
+ call_malloc_debug = flag;
+ return 1;
+}
+
+void CRYPTO_get_mem_functions(
+ void *(**m)(size_t, const char *, int),
+ void *(**r)(void *, size_t, const char *, int),
+ void (**f)(void *, const char *, int))
+{
+ if (m != NULL)
+ *m = malloc_impl;
+ if (r != NULL)
+ *r = realloc_impl;
+ if (f != NULL)
+ *f = free_impl;
+}
+
+void *CRYPTO_malloc(size_t num, const char *file, int line)
+{
+ void *ret = NULL;
+
+ if (malloc_impl != NULL && malloc_impl != CRYPTO_malloc)
+ return malloc_impl(num, file, line);
+
+ if (num <= 0)
+ return NULL;
+
+ allow_customize = 0;
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG
+ if (call_malloc_debug) {
+ CRYPTO_mem_debug_malloc(NULL, num, 0, file, line);
+ ret = malloc(num);
+ CRYPTO_mem_debug_malloc(ret, num, 1, file, line);
+ } else {
+ ret = malloc(num);
+ }
+#else
+ osslargused(file); osslargused(line);
+ ret = malloc(num);
#endif
- realloc_debug_func(str, ret, num, file, line, 1);
-
- return ret;
- }
-void CRYPTO_free(void *str)
- {
- free_debug_func(str, 0);
-#ifdef LEVITTE_DEBUG
- fprintf(stderr, "LEVITTE_DEBUG: < 0x%p\n", str);
+ return ret;
+}
+
+void *CRYPTO_zalloc(size_t num, const char *file, int line)
+{
+ void *ret = CRYPTO_malloc(num, file, line);
+
+ if (ret != NULL)
+ memset(ret, 0, num);
+ return ret;
+}
+
+void *CRYPTO_realloc(void *str, size_t num, const char *file, int line)
+{
+ if (realloc_impl != NULL && realloc_impl != &CRYPTO_realloc)
+ return realloc_impl(str, num, file, line);
+
+ if (str == NULL)
+ return CRYPTO_malloc(num, file, line);
+
+ if (num == 0) {
+ CRYPTO_free(str, file, line);
+ return NULL;
+ }
+
+ allow_customize = 0;
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG
+ if (call_malloc_debug) {
+ void *ret;
+ CRYPTO_mem_debug_realloc(str, NULL, num, 0, file, line);
+ ret = realloc(str, num);
+ CRYPTO_mem_debug_realloc(str, ret, num, 1, file, line);
+ return ret;
+ }
+#else
+ osslargused(file); osslargused(line);
+#endif
+ return realloc(str, num);
+
+}
+
+void *CRYPTO_clear_realloc(void *str, size_t old_len, size_t num,
+ const char *file, int line)
+{
+ void *ret = NULL;
+
+ if (str == NULL)
+ return CRYPTO_malloc(num, file, line);
+
+ if (num == 0) {
+ CRYPTO_clear_free(str, old_len, file, line);
+ return NULL;
+ }
+
+ /* Can't shrink the buffer since memcpy below copies |old_len| bytes. */
+ if (num < old_len) {
+ memset((char*)str + num, 0, old_len - num);
+ return str;
+ }
+
+ ret = CRYPTO_malloc(num, file, line);
+ if (ret != NULL) {
+ memcpy(ret, str, old_len);
+ CRYPTO_clear_free(str, old_len, file, line);
+ }
+ return ret;
+}
+
+void CRYPTO_free(void *str, const char *file, int line)
+{
+ if (free_impl != NULL && free_impl != &CRYPTO_free) {
+ free_impl(str, file, line);
+ return;
+ }
+
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG
+ if (call_malloc_debug) {
+ CRYPTO_mem_debug_free(str, 0, file, line);
+ free(str);
+ CRYPTO_mem_debug_free(str, 1, file, line);
+ } else {
+ free(str);
+ }
+#else
+ free(str);
#endif
- free_func(str);
- free_debug_func(NULL, 1);
- }
-
-
-void *CRYPTO_remalloc(void *a, int num, char *file, int line)
- {
- if (a != NULL) Free(a);
- a=(char *)Malloc(num);
- return(a);
- }
-
-void CRYPTO_set_mem_debug_options(int bits)
- {
- set_debug_options_func(bits);
- }
-
-int CRYPTO_get_mem_debug_options()
- {
- return get_debug_options_func();
- }
+}
+
+void CRYPTO_clear_free(void *str, size_t num, const char *file, int line)
+{
+ if (str == NULL)
+ return;
+ if (num)
+ OPENSSL_cleanse(str, num);
+ CRYPTO_free(str, file, line);
+}
projects / openssl.git / blobdiff