-/* 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>
-#ifdef CRYPTO_MDEBUG_TIME
-# include <time.h>
-#endif
-#include <openssl/buffer.h>
-#include <openssl/bio.h>
-#include <openssl/lhash.h>
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
-/* #ifdef CRYPTO_MDEBUG */
-/* static int mh_mode=CRYPTO_MEM_CHECK_ON; */
-/* #else */
-static int mh_mode=CRYPTO_MEM_CHECK_OFF;
-static unsigned long disabling_thread = 0;
-/* #endif */
-/* State CRYPTO_MEM_CHECK_ON exists only temporarily when the library
- * thinks that certain allocations should not be checked (e.g. the data
- * structures used for memory checking). It is not suitable as an initial
- * state: the library will unexpectedly enable memory checking when it
- * executes one of those sections that want to disable checking
- * temporarily.
- *
- * State CRYPTO_MEM_CHECK_ENABLE without ..._ON makes no sense whatsoever.
+/*
+ * the following pointers may be changed as long as 'allow_customize' is set
*/
-
-static unsigned long order=0;
-
-static LHASH *amih=NULL;
-
-typedef struct app_mem_info_st
- {
- unsigned long thread;
- const char *file;
- int line;
- const char *info;
- struct app_mem_info_st *next;
- int references;
- } APP_INFO;
-
-static LHASH *mh=NULL;
-
-typedef struct mem_st
- {
- char *addr;
- int num;
- const char *file;
- int line;
-#ifdef CRYPTO_MDEBUG_THREAD
- unsigned long thread;
-#endif
- unsigned long order;
-#ifdef CRYPTO_MDEBUG_TIME
- time_t time;
-#endif
- APP_INFO *app_info;
- } MEM;
-
-int CRYPTO_mem_ctrl(int mode)
- {
- int ret=mh_mode;
-
- CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
- switch (mode)
- {
- /* for applications: */
- case CRYPTO_MEM_CHECK_ON: /* aka MemCheck_start() */
- mh_mode = CRYPTO_MEM_CHECK_ON|CRYPTO_MEM_CHECK_ENABLE;
- disabling_thread = 0;
- break;
- case CRYPTO_MEM_CHECK_OFF: /* aka MemCheck_stop() */
- mh_mode = 0;
- disabling_thread = 0;
- break;
-
- /* switch off temporarily (for library-internal use): */
- case CRYPTO_MEM_CHECK_DISABLE: /* aka MemCheck_off() */
- if (mh_mode & CRYPTO_MEM_CHECK_ON)
- {
- mh_mode&= ~CRYPTO_MEM_CHECK_ENABLE;
- if (disabling_thread != CRYPTO_thread_id())
- {
- CRYPTO_w_lock(CRYPTO_LOCK_MALLOC2);
- disabling_thread=CRYPTO_thread_id();
- }
- }
- break;
- case CRYPTO_MEM_CHECK_ENABLE: /* aka MemCheck_on() */
- if (mh_mode & CRYPTO_MEM_CHECK_ON)
- {
- mh_mode|=CRYPTO_MEM_CHECK_ENABLE;
- if (disabling_thread != 0)
- {
- disabling_thread=0;
- CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC2);
- }
- }
- break;
-
- default:
- break;
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
- return(ret);
- }
-
-static int is_MemCheck_On()
- {
- int ret = 0;
-
- if (mh_mode & CRYPTO_MEM_CHECK_ON)
- {
- CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
-
- ret = (mh_mode & CRYPTO_MEM_CHECK_ENABLE)
- && disabling_thread != CRYPTO_thread_id();
-
- CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
- }
- return(ret);
- }
-
-static int mem_cmp(MEM *a, MEM *b)
- {
- return(a->addr - b->addr);
- }
-
-static unsigned long mem_hash(MEM *a)
- {
- unsigned long ret;
-
- ret=(unsigned long)a->addr;
-
- ret=ret*17851+(ret>>14)*7+(ret>>4)*251;
- return(ret);
- }
-
-static int app_info_cmp(APP_INFO *a, APP_INFO *b)
- {
- return(a->thread - b->thread);
- }
-
-static unsigned long app_info_hash(APP_INFO *a)
- {
- unsigned long ret;
-
- ret=(unsigned long)a->thread;
-
- ret=ret*17851+(ret>>14)*7+(ret>>4)*251;
- return(ret);
- }
-
-static APP_INFO *free_info(APP_INFO *app_info)
- {
- APP_INFO *next;
-
- if (app_info == NULL)
- return NULL;
-
- if (--(app_info->references) > 0)
- return app_info;
-
- app_info->references = 0;
-
- next = app_info->next;
- app_info->next = NULL; /* Just to make sure */
-
- Free(app_info);
- if (next != app_info)
- return free_info(next);
- return NULL;
- }
-
-static APP_INFO *remove_info()
- {
- APP_INFO tmp;
- APP_INFO *ret = NULL;
-
- if (amih != NULL)
- {
- tmp.thread=CRYPTO_thread_id();
- if ((ret=(APP_INFO *)lh_delete(amih,(char *)&tmp)) != NULL)
- {
- APP_INFO *next=ret->next;
-#ifdef LEVITTE_DEBUG
- if (ret->thread != tmp.thread)
- {
- fprintf(stderr, "remove_info(): deleted info has other thread ID (%lu) than the current thread (%lu)!!!!\n",
- ret->thread, tmp.thread);
- abort();
- }
-#endif
- if (next != NULL)
- {
- lh_insert(amih,(char *)next);
- }
- free_info(ret);
- }
- }
- return(ret);
- }
-
-int CRYPTO_add_info(const char *file, int line, const char *info)
- {
- APP_INFO *ami, *amim;
- int ret=0;
-
- if (is_MemCheck_On())
- {
- MemCheck_off();
-
- if ((ami = (APP_INFO *)Malloc(sizeof(APP_INFO))) == NULL)
- {
- ret=0;
- goto err;
- }
- if (amih == NULL)
- {
- if ((amih=lh_new(app_info_hash,app_info_cmp)) == NULL)
- {
- Free(ami);
- ret=0;
- goto err;
- }
- }
-
- ami->thread=CRYPTO_thread_id();
- ami->file=file;
- ami->line=line;
- ami->info=info;
- ami->references=1;
- ami->next=NULL;
-
- if ((amim=(APP_INFO *)lh_insert(amih,(char *)ami)) != NULL)
- {
-#ifdef LEVITTE_DEBUG
- if (ami->thread != amim->thread)
- {
- fprintf(stderr, "CRYPTO_add_info(): previous info has other thread ID (%lu) than the current thread (%lu)!!!!\n",
- amim->thread, ami->thread);
- abort();
- }
-#endif
- ami->next=amim;
- }
- err:
- MemCheck_on();
- }
-
- return(ret);
- }
-
-int CRYPTO_remove_info()
- {
- int ret=0;
-
- if (is_MemCheck_On())
- {
- MemCheck_off();
-
- ret=(remove_info() != NULL);
-
- MemCheck_on();
- }
- 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(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(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_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)
- {
- return(malloc_locked_func(num));
- }
-
-void CRYPTO_free_locked(void *str)
- {
- free_locked_func(str);
- }
-
-void *CRYPTO_malloc(int num)
- {
- return(malloc_func(num));
- }
-
-void *CRYPTO_realloc(void *str, int num)
- {
- return(realloc_func(str,num));
- }
+static int allow_customize = 1;
+
+static void *(*malloc_wrapper)(size_t, const char *, int)
+ = CRYPTO_malloc;
+static void *(*realloc_wrapper)(void *, size_t, const char *, int)
+ = CRYPTO_realloc;
+static void (*free_wrapper)(void *)
+ = CRYPTO_free;
+
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG
+static int call_malloc_debug = 1;
+#else
+static int call_malloc_debug = 0;
+#endif
+
+int CRYPTO_set_mem_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)
+ malloc_wrapper = m;
+ if (r)
+ realloc_wrapper = r;
+ if (f)
+ free_wrapper = 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 *))
+{
+ if (m != NULL)
+ *m = malloc_wrapper;
+ if (r != NULL)
+ *r = realloc_wrapper;
+ if (f != NULL)
+ *f = free_wrapper;
+}
+
+void *CRYPTO_malloc(size_t num, const char *file, int line)
+{
+ void *ret = NULL;
+
+ 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
+ (void)file;
+ (void)line;
+ ret = malloc(num);
+#endif
+
+#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_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 (str == NULL)
+ return CRYPTO_malloc(num, file, line);
+
+ if (num == 0) {
+ CRYPTO_free(str);
+ 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
+ (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);
+ 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;
+ }
+
+ /* Allocate new memory. Call malloc and do a copy, so that we can
+ * cleanse the old buffer. */
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG
+ if (call_malloc_debug) {
+ CRYPTO_mem_debug_realloc(str, NULL, num, 0, file, line);
+ ret = malloc(num);
+ CRYPTO_mem_debug_realloc(str, ret, num, 1, file, line);
+ } else {
+ ret = malloc(num);
+ }
+#else
+ (void)file;
+ (void)line;
+ ret = malloc(num);
+#endif
+
+ if (ret)
+ memcpy(ret, str, old_len);
+ CRYPTO_clear_free(str, old_len);
+ return ret;
+}
void CRYPTO_free(void *str)
- {
- free_func(str);
- }
-
-static unsigned long break_order_num=0;
-void *CRYPTO_dbg_malloc(int num, const char *file, int line)
- {
- char *ret;
- MEM *m,*mm;
- APP_INFO tmp,*amim;
-
- if ((ret=malloc_func(num)) == NULL)
- return(NULL);
-
- if (is_MemCheck_On())
- {
- MemCheck_off();
- if ((m=(MEM *)Malloc(sizeof(MEM))) == NULL)
- {
- Free(ret);
- MemCheck_on();
- return(NULL);
- }
- 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;
-#ifdef CRYPTO_MDEBUG_THREAD
- m->thread=CRYPTO_thread_id();
-#endif
- if (order == break_order_num)
- {
- /* BREAK HERE */
- m->order=order;
- }
- m->order=order++;
-#ifdef CRYPTO_MDEBUG_TIME
- m->time=time(NULL);
-#endif
-
- tmp.thread=CRYPTO_thread_id();
- m->app_info=NULL;
- if (amih != NULL
- && (amim=(APP_INFO *)lh_retrieve(amih,(char *)&tmp)) != NULL)
- {
- m->app_info = amim;
- amim->references++;
- }
-
- if ((mm=(MEM *)lh_insert(mh,(char *)m)) != NULL)
- {
- /* Not good, but don't sweat it */
- if (mm->app_info != NULL)
- {
- mm->app_info->references--;
- }
- Free(mm);
- }
-err:
- MemCheck_on();
- }
- return(ret);
- }
-
-void CRYPTO_dbg_free(void *addr)
- {
- MEM m,*mp;
-
- if (is_MemCheck_On() && (mh != NULL))
- {
- MemCheck_off();
-
- m.addr=addr;
- mp=(MEM *)lh_delete(mh,(char *)&m);
- if (mp != NULL)
- {
- if (mp->app_info != NULL)
- {
- mp->app_info->references--;
- }
- Free(mp);
- }
-
- MemCheck_on();
- }
- free_func(addr);
- }
-
-void *CRYPTO_dbg_realloc(void *addr, int num, const char *file, int line)
- {
- char *ret;
- MEM m,*mp;
-
- ret=realloc_func(addr,num);
- if (ret == addr) return(ret);
-
- if (is_MemCheck_On())
- {
- if (ret == NULL) return(NULL);
-
- MemCheck_off();
-
- m.addr=addr;
- mp=(MEM *)lh_delete(mh,(char *)&m);
- if (mp != NULL)
- {
- mp->addr=ret;
- lh_insert(mh,(char *)mp);
- }
-
- MemCheck_on();
- }
- return(ret);
- }
-
-void *CRYPTO_remalloc(void *a, int n)
- {
- if (a != NULL) Free(a);
- a=(char *)Malloc(n);
- return(a);
- }
-
-void *CRYPTO_dbg_remalloc(void *a, int n, const 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(MEM *m, MEM_LEAK *l)
- {
- char buf[128];
- APP_INFO *amip;
- int ami_cnt;
-#ifdef CRYPTO_MDEBUG_TIME
- struct tm *lcl;
-#endif
- unsigned long ti;
-
- if(m->addr == (char *)l->bio)
- return;
-
-#ifdef CRYPTO_MDEBUG_TIME
- lcl = localtime(&m->time);
-#endif
-
- sprintf(buf,
-#ifdef CRYPTO_MDEBUG_TIME
- "[%02d:%02d:%02d] "
-#endif
- "%5lu file=%s, line=%d, "
-#ifdef CRYPTO_MDEBUG_THREAD
- "thread=%lu, "
-#endif
- "number=%d, address=%08lX\n",
-#ifdef CRYPTO_MDEBUG_TIME
- lcl->tm_hour,lcl->tm_min,lcl->tm_sec,
-#endif
- m->order,m->file,m->line,
-#ifdef CRYPTO_MDEBUG_THREAD
- m->thread,
-#endif
- m->num,(unsigned long)m->addr);
-
- BIO_puts(l->bio,buf);
-
- l->chunks++;
- l->bytes+=m->num;
-
- amip=m->app_info;
- ami_cnt=0;
- if (amip)
- ti=amip->thread;
- while(amip && amip->thread == ti)
- {
- int buf_len;
- int info_len;
-
- ami_cnt++;
- memset(buf,'>',ami_cnt);
- sprintf(buf + ami_cnt,
- "thread=%lu, file=%s, line=%d, info=\"",
- amip->thread, amip->file, amip->line);
- buf_len=strlen(buf);
- info_len=strlen(amip->info);
- if (128 - buf_len - 3 < info_len)
- {
- memcpy(buf + buf_len, amip->info, 128 - buf_len - 3);
- buf_len = 128 - 3;
- }
- else
- {
- strcpy(buf + buf_len, amip->info);
- buf_len = strlen(buf);
- }
- sprintf(buf + buf_len, "\"\n");
-
- BIO_puts(l->bio,buf);
-
- amip = amip->next;
- }
-#ifdef LEVITTE_DEBUG
- if (amip)
- {
- fprintf(stderr, "Thread switch detected i backtrace!!!!\n");
- abort();
- }
-#endif
- }
-
-void CRYPTO_mem_leaks(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_MALLOC2);
- lh_doall_arg(mh,(void (*)())print_leak,(char *)&ml);
- CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC2);
- 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);
-#endif
- }
-
-static void (*mem_cb)()=NULL;
-
-static void cb_leak(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(void (*cb)())
- {
- if (mh == NULL) return;
- CRYPTO_w_lock(CRYPTO_LOCK_MALLOC2);
- mem_cb=cb;
- lh_doall_arg(mh,(void (*)())cb_leak,(char *)mem_cb);
- mem_cb=NULL;
- CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC2);
- }
-
-#ifndef NO_FP_API
-void CRYPTO_mem_leaks_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);
- }
-#endif
-
+{
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG
+ if (call_malloc_debug) {
+ CRYPTO_mem_debug_free(str, 0);
+ free(str);
+ CRYPTO_mem_debug_free(str, 1);
+ } else {
+ free(str);
+ }
+#else
+ free(str);
+#endif
+}
+
+void CRYPTO_clear_free(void *str, size_t num)
+{
+ if (str == NULL)
+ return;
+ if (num)
+ OPENSSL_cleanse(str, num);
+ CRYPTO_free(str);
+}