-/* crypto/mem.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2018 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 "e_os.h"
+#include "internal/cryptlib.h"
+#include "internal/cryptlib_int.h"
#include <stdio.h>
#include <stdlib.h>
-#include "buffer.h"
-#include "bio.h"
-#include "lhash.h"
-#include "cryptlib.h"
+#include <limits.h>
+#include <openssl/crypto.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;
+
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG
+# include "internal/tsan_assist.h"
+
+static TSAN_QUALIFIER int malloc_count;
+static TSAN_QUALIFIER int realloc_count;
+static TSAN_QUALIFIER int free_count;
+
+# define INCREMENT(x) tsan_counter(&(x))
+
+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 parseit(void);
+static int shouldfail(void);
+
+# define FAILTEST() if (shouldfail()) return NULL
-#ifdef CRYPTO_MDEBUG
-static int mh_mode=CRYPTO_MEM_CHECK_ON;
#else
-static int mh_mode=CRYPTO_MEM_CHECK_OFF;
+static int call_malloc_debug = 0;
+
+# define INCREMENT(x) /* empty */
+# define FAILTEST() /* empty */
#endif
-static unsigned long order=0;
-
-static LHASH *mh=NULL;
-
-typedef struct mem_st
- {
- char *addr;
- int num;
- char *file;
- int line;
- unsigned long order;
- } MEM;
-
-int CRYPTO_mem_ctrl(mode)
-int mode;
- {
- int ret=mh_mode;
-
- CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
- switch (mode)
- {
- case CRYPTO_MEM_CHECK_ON:
- mh_mode|=CRYPTO_MEM_CHECK_ON;
- break;
- case CRYPTO_MEM_CHECK_OFF:
- mh_mode&= ~CRYPTO_MEM_CHECK_ON;
- break;
- case CRYPTO_MEM_CHECK_DISABLE:
- mh_mode&= ~CRYPTO_MEM_CHECK_ENABLE;
- break;
- case CRYPTO_MEM_CHECK_ENABLE:
- if (mh_mode&CRYPTO_MEM_CHECK_ON)
- mh_mode|=CRYPTO_MEM_CHECK_ENABLE;
- break;
- default:
- break;
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
- return(ret);
- }
-
-static int mem_cmp(a,b)
-MEM *a,*b;
- {
- return(a->addr - b->addr);
- }
-
-static unsigned long mem_hash(a)
-MEM *a;
- {
- unsigned long ret;
-
- ret=(unsigned long)a->addr;
-
- ret=ret*17851+(ret>>14)*7+(ret>>4)*251;
- return(ret);
- }
-
-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;
-
-void CRYPTO_set_mem_functions(m,r,f)
-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_locked_mem_functions(m,f)
-char *(*m)();
-void (*f)();
- {
- if ((m == NULL) || (f == NULL)) return;
- malloc_locked_func=m;
- free_locked_func=f;
- }
-
-void CRYPTO_get_mem_functions(m,r,f)
-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_locked_mem_functions(m,f)
-char *(**m)();
-void (**f)();
- {
- if (m != NULL) *m=malloc_locked_func;
- if (f != NULL) *f=free_locked_func;
- }
-
-char *CRYPTO_malloc_locked(num)
-int num;
- {
- return(malloc_locked_func(num));
- }
-
-void CRYPTO_free_locked(str)
-char *str;
- {
- free_locked_func(str);
- }
-
-char *CRYPTO_malloc(num)
-int num;
- {
- return(malloc_func(num));
- }
-
-char *CRYPTO_realloc(str,num)
-char *str;
-int num;
- {
- return(realloc_func(str,num));
- }
-
-void CRYPTO_free(str)
-char *str;
- {
- free_func(str);
- }
-
-static unsigned long break_order_num=0;
-char *CRYPTO_dbg_malloc(num,file,line)
-int num;
-char *file;
-int line;
- {
- char *ret;
- MEM *m,*mm;
-
- if ((ret=malloc_func(num)) == NULL)
- return(NULL);
-
- if (mh_mode & CRYPTO_MEM_CHECK_ENABLE)
- {
- MemCheck_off();
- if ((m=(MEM *)Malloc(sizeof(MEM))) == NULL)
- {
- Free(ret);
- MemCheck_on();
- return(NULL);
- }
- CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
- if (mh == NULL)
- {
- if ((mh=lh_new(mem_hash,mem_cmp)) == NULL)
- {
- Free(ret);
- Free(m);
- ret=NULL;
- goto err;
- }
- }
-
- m->addr=ret;
- m->file=file;
- m->line=line;
- m->num=num;
- if (order == break_order_num)
- {
- /* BREAK HERE */
- m->order=order;
- }
- m->order=order++;
- if ((mm=(MEM *)lh_insert(mh,(char *)m)) != NULL)
- {
- /* Not good, but don't sweat it */
- Free(mm);
- }
-err:
- CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
- MemCheck_on();
- }
- return(ret);
- }
-
-void CRYPTO_dbg_free(addr)
-char *addr;
- {
- MEM m,*mp;
-
- if ((mh_mode & CRYPTO_MEM_CHECK_ENABLE) && (mh != NULL))
- {
- MemCheck_off();
- CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
- m.addr=addr;
- mp=(MEM *)lh_delete(mh,(char *)&m);
- if (mp != NULL)
- Free(mp);
- CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
- MemCheck_on();
- }
- free_func(addr);
- }
-
-char *CRYPTO_dbg_realloc(addr,num,file,line)
-char *addr;
-int num;
-char *file;
-int line;
- {
- char *ret;
- MEM m,*mp;
-
- ret=realloc_func(addr,num);
- if (ret == addr) return(ret);
-
- if (mh_mode & CRYPTO_MEM_CHECK_ENABLE)
- {
- MemCheck_off();
- if (ret == NULL) return(NULL);
- m.addr=addr;
- CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
- mp=(MEM *)lh_delete(mh,(char *)&m);
- if (mp != NULL)
- {
- mp->addr=ret;
- lh_insert(mh,(char *)mp);
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
- MemCheck_on();
- }
- return(ret);
- }
-
-char *CRYPTO_remalloc(a,n)
-char *a;
-int n;
- {
- if (a != NULL) Free(a);
- a=(char *)Malloc(n);
- return(a);
- }
-
-char *CRYPTO_dbg_remalloc(a,n,file,line)
-char *a;
-int n;
-char *file;
-int line;
- {
- if (a != NULL) CRYPTO_dbg_free(a);
- a=(char *)CRYPTO_dbg_malloc(n,file,line);
- return(a);
- }
-
-
-typedef struct mem_leak_st
- {
- BIO *bio;
- int chunks;
- long bytes;
- } MEM_LEAK;
-
-static void print_leak(m,l)
-MEM *m;
-MEM_LEAK *l;
- {
- char buf[128];
-
- sprintf(buf,"%5ld file=%s, line=%d, number=%d, address=%08lX\n",
- m->order,m->file,m->line,m->num,(long)m->addr);
- BIO_puts(l->bio,buf);
- l->chunks++;
- l->bytes+=m->num;
- }
-
-void CRYPTO_mem_leaks(b)
-BIO *b;
- {
- MEM_LEAK ml;
- char buf[80];
-
- if (mh == NULL) return;
- ml.bio=b;
- ml.bytes=0;
- ml.chunks=0;
- CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
- lh_doall_arg(mh,(void (*)())print_leak,(char *)&ml);
- CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
- if (ml.chunks != 0)
- {
- sprintf(buf,"%ld bytes leaked in %d chunks\n",
- ml.bytes,ml.chunks);
- BIO_puts(b,buf);
- }
-
-#if 0
- lh_stats_bio(mh,b);
- lh_node_stats_bio(mh,b);
- lh_node_usage_stats_bio(mh,b);
+
+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
+void CRYPTO_get_alloc_counts(int *mcount, int *rcount, int *fcount)
+{
+ if (mcount != NULL)
+ *mcount = tsan_load(&malloc_count);
+ if (rcount != NULL)
+ *rcount = tsan_load(&realloc_count);
+ if (fcount != NULL)
+ *fcount = tsan_load(&free_count);
+}
+
+/*
+ * 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);
+
+ if (semi != NULL)
+ md_failstring = semi;
+}
+
+/*
+ * Windows doesn't have random(), but it has rand()
+ * Some rand() implementations aren't good, but we're not
+ * dealing with secure randomness here.
+ */
+# ifdef _WIN32
+# define random() rand()
+# endif
+/*
+ * See if the current malloc should fail.
+ */
+static int shouldfail(void)
+{
+ int roll = (int)(random() % 100);
+ int shoulditfail = roll < md_fail_percent;
+# ifndef _WIN32
+/* suppressed on Windows as POSIX-like file descriptors are non-inheritable */
+ int len;
+ 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);
+ len = strlen(buff);
+ if (write(md_tracefd, buff, len) != len)
+ perror("shouldfail write failed");
+# 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
+ }
+# endif
+
+ 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
- }
-
-static void (*mem_cb)()=NULL;
-
-static void cb_leak(m,cb)
-MEM *m;
-char *cb;
- {
- void (*mem_callback)()=(void (*)())cb;
- mem_callback(m->order,m->file,m->line,m->num,m->addr);
- }
-
-void CRYPTO_mem_leaks_cb(cb)
-void (*cb)();
- {
- if (mh == NULL) return;
- CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
- mem_cb=cb;
- lh_doall_arg(mh,(void (*)())cb_leak,(char *)mem_cb);
- mem_cb=NULL;
- CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
- }
-
-#ifndef NO_FP_API
-void CRYPTO_mem_leaks_fp(fp)
-FILE *fp;
- {
- BIO *b;
-
- if (mh == NULL) return;
- if ((b=BIO_new(BIO_s_file())) == NULL)
- return;
- BIO_set_fp(b,fp,BIO_NOCLOSE);
- CRYPTO_mem_leaks(b);
- BIO_free(b);
- }
+
+void *CRYPTO_malloc(size_t num, const char *file, int line)
+{
+ void *ret = NULL;
+
+ INCREMENT(malloc_count);
+ if (malloc_impl != NULL && malloc_impl != CRYPTO_malloc)
+ return malloc_impl(num, file, line);
+
+ if (num == 0)
+ return NULL;
+
+ FAILTEST();
+ if (allow_customize) {
+ /*
+ * Disallow customization after the first allocation. We only set this
+ * if necessary to avoid a store to the same cache line on every
+ * allocation.
+ */
+ 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
+ (void)(file); (void)(line);
+ ret = malloc(num);
#endif
+ 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)
+{
+ INCREMENT(realloc_count);
+ 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;
+ }
+
+#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
+ (void)(file); (void)(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) {
+ 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)
+{
+ INCREMENT(free_count);
+ 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
+}
+
+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);
+}