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-rw-r--r--openssl/crypto/mem.c414
1 files changed, 414 insertions, 0 deletions
diff --git a/openssl/crypto/mem.c b/openssl/crypto/mem.c
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+++ b/openssl/crypto/mem.c
@@ -0,0 +1,414 @@
+/* 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 *))
+ {
+ 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);
+#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;
+
+ 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;
+ }
+#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;
+
+ 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);
+#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_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;
+ }
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