-/* crypto/mem.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. 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.]
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <stdlib.h>
+#include <limits.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. */
+#include "internal/cryptlib.h"
+#include "internal/cryptlib_int.h"
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG_BACKTRACE
+# include <execinfo.h>
+#endif
+/*
+ * 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;
-/* the following pointers may be changed as long as 'allow_customize' is set */
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG
+static char *md_failstring;
+static long md_count;
+static int md_fail_percent = 0;
+static int md_tracefd = -1;
+static int call_malloc_debug = 1;
-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 parseit(void);
+static int shouldfail(void);
-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;
+# define FAILTEST() if (shouldfail()) return NULL
-static void (*free_func)(void *) = free;
+#else
+static int call_malloc_debug = 0;
-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;
+# define FAILTEST() /* empty */
+#endif
-static void (*free_locked_func)(void *) = free;
+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;
+}
+
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG
+/*
+ * Parse a "malloc failure spec" string. This likes like a set of fields
+ * separated by semicolons. Each field has a count and an optional failure
+ * percentage. For example:
+ * 100@0;100@25;0@0
+ * or 100;100@25;0
+ * This means 100 mallocs succeed, then next 100 fail 25% of the time, and
+ * all remaining (count is zero) succeed.
+ */
+static void parseit(void)
+{
+ char *semi = strchr(md_failstring, ';');
+ char *atsign;
+ if (semi != NULL)
+ *semi++ = '\0';
+ /* Get the count (atol will stop at the @ if there), and percentage */
+ md_count = atol(md_failstring);
+ atsign = strchr(md_failstring, '@');
+ md_fail_percent = atsign == NULL ? 0 : atoi(atsign + 1);
-/* 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
+ if (semi != NULL)
+ md_failstring = semi;
+}
-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;
-
- allow_customize = 0;
- if (malloc_debug_func != NULL)
- {
- 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);
+/*
+ * See if the current malloc should fail.
+ */
+static int shouldfail(void)
+{
+ int roll = (int)(random() % 100);
+ int shoulditfail = roll < md_fail_percent;
+ char buff[80];
+
+ if (md_tracefd > 0) {
+ BIO_snprintf(buff, sizeof(buff),
+ "%c C%ld %%%d R%d\n",
+ shoulditfail ? '-' : '+', md_count, md_fail_percent, roll);
+ write(md_tracefd, buff, strlen(buff));
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG_BACKTRACE
+ if (shoulditfail) {
+ void *addrs[30];
+ int num = backtrace(addrs, OSSL_NELEM(addrs));
+
+ backtrace_symbols_fd(addrs, num, md_tracefd);
+ }
#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;
- }
+ }
+
+ if (md_count) {
+ /* If we used up this one, go to the next. */
+ if (--md_count == 0)
+ parseit();
+ }
+
+ return shoulditfail;
+}
+
+void ossl_malloc_setup_failures(void)
+{
+ const char *cp = getenv("OPENSSL_MALLOC_FAILURES");
+
+ if (cp != NULL && (md_failstring = strdup(cp)) != NULL)
+ parseit();
+ if ((cp = getenv("OPENSSL_MALLOC_FD")) != NULL)
+ md_tracefd = atoi(cp);
+}
#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;
-
- allow_customize = 0;
- if (malloc_debug_func != NULL)
- {
- 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;
- }
+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;
+
+ FAILTEST();
+ 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
- return ret;
- }
-char *CRYPTO_strdup(const char *str, const char *file, int line)
- {
- char *ret = CRYPTO_malloc(strlen(str)+1, file, line);
-
- 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_cleanse(str,old_len);
- free_func(str);
- }
-#ifdef LEVITTE_DEBUG_MEM
- fprintf(stderr,
- "LEVITTE_DEBUG_MEM: | 0x%p -> 0x%p (%d)\n",
- str, ret, num);
+ return ret;
+}
+
+void *CRYPTO_zalloc(size_t num, const char *file, int line)
+{
+ void *ret = CRYPTO_malloc(num, file, line);
+
+ FAILTEST();
+ 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);
+
+ FAILTEST();
+ 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
- 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);
+ 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) {
+ OPENSSL_cleanse((char*)str + num, 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);
- if (free_debug_func != NULL)
- free_debug_func(NULL, 1);
- }
-
-void *CRYPTO_remalloc(void *a, int num, const char *file, int line)
- {
- if (a != NULL) OPENSSL_free(a);
- a=(char *)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;
- }
+}
+
+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