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Diffstat (limited to 'crypto/mem.c')
-rw-r--r-- | crypto/mem.c | 401 |
1 files changed, 401 insertions, 0 deletions
diff --git a/crypto/mem.c b/crypto/mem.c new file mode 100644 index 0000000..6635167 --- /dev/null +++ b/crypto/mem.c @@ -0,0 +1,401 @@ +/* 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; + extern unsigned char cleanse_ctr; + + 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); + + /* 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)) + ((unsigned char *)ret)[0] = cleanse_ctr; + + 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; + extern unsigned char cleanse_ctr; + + 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); + + /* 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)) + ((unsigned char *)ret)[0] = cleanse_ctr; + + 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; + } |