* 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 "cryptlib.h"
+#include "internal/cryptlib.h"
#include <openssl/buffer.h>
-/* LIMIT_BEFORE_EXPANSION is the maximum n such that (n+3)/3*4 < 2**31. That
- * function is applied in several functions in this file and this limit ensures
- * that the result fits in an int. */
+/*
+ * LIMIT_BEFORE_EXPANSION is the maximum n such that (n+3)/3*4 < 2**31. That
+ * function is applied in several functions in this file and this limit
+ * ensures that the result fits in an int.
+ */
#define LIMIT_BEFORE_EXPANSION 0x5ffffffc
+BUF_MEM *BUF_MEM_new_ex(unsigned long flags)
+{
+ BUF_MEM *ret;
+
+ ret = BUF_MEM_new();
+ if (ret != NULL)
+ ret->flags = flags;
+ return (ret);
+}
+
BUF_MEM *BUF_MEM_new(void)
- {
- BUF_MEM *ret;
+{
+ BUF_MEM *ret;
- ret=OPENSSL_malloc(sizeof(BUF_MEM));
- if (ret == NULL)
- {
- BUFerr(BUF_F_BUF_MEM_NEW,ERR_R_MALLOC_FAILURE);
- return(NULL);
- }
- ret->length=0;
- ret->max=0;
- ret->data=NULL;
- return(ret);
- }
+ ret = OPENSSL_malloc(sizeof(*ret));
+ if (ret == NULL) {
+ BUFerr(BUF_F_BUF_MEM_NEW, ERR_R_MALLOC_FAILURE);
+ return (NULL);
+ }
+ ret->flags = 0;
+ ret->length = 0;
+ ret->max = 0;
+ ret->data = NULL;
+ return (ret);
+}
void BUF_MEM_free(BUF_MEM *a)
- {
- if(a == NULL)
- return;
+{
+ if (a == NULL)
+ return;
+
+ if (a->data != NULL) {
+ memset(a->data, 0, (unsigned int)a->max);
+ if (a->flags & BUF_MEM_FLAG_SECURE)
+ OPENSSL_secure_free(a->data);
+ else
+ OPENSSL_clear_free(a->data, a->max);
+ }
+ OPENSSL_free(a);
+}
+
+/* Allocate a block of secure memory; copy over old data if there
+ * was any, and then free it. */
+static char *sec_alloc_realloc(BUF_MEM *str, size_t len)
+{
+ char *ret;
- if (a->data != NULL)
- {
- memset(a->data,0,(unsigned int)a->max);
- OPENSSL_free(a->data);
- }
- OPENSSL_free(a);
- }
+ ret = OPENSSL_secure_malloc(len);
+ if (str->data != NULL) {
+ if (ret != NULL)
+ memcpy(ret, str->data, str->length);
+ OPENSSL_secure_free(str->data);
+ }
+ return (ret);
+}
-int BUF_MEM_grow(BUF_MEM *str, size_t len)
- {
- char *ret;
- size_t n;
+size_t BUF_MEM_grow(BUF_MEM *str, size_t len)
+{
+ char *ret;
+ size_t n;
- if (str->length >= len)
- {
- str->length=len;
- return(len);
- }
- if (str->max >= len)
- {
- memset(&str->data[str->length],0,len-str->length);
- str->length=len;
- return(len);
- }
- /* This limit is sufficient to ensure (len+3)/3*4 < 2**31 */
- if (len > LIMIT_BEFORE_EXPANSION)
- {
- BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE);
- return 0;
- }
- n=(len+3)/3*4;
- if (str->data == NULL)
- ret=OPENSSL_malloc(n);
- else
- ret=OPENSSL_realloc(str->data,n);
- if (ret == NULL)
- {
- BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE);
- len=0;
- }
- else
- {
- str->data=ret;
- str->max=n;
- memset(&str->data[str->length],0,len-str->length);
- str->length=len;
- }
- return(len);
- }
+ if (str->length >= len) {
+ str->length = len;
+ return (len);
+ }
+ if (str->max >= len) {
+ memset(&str->data[str->length], 0, len - str->length);
+ str->length = len;
+ return (len);
+ }
+ /* This limit is sufficient to ensure (len+3)/3*4 < 2**31 */
+ if (len > LIMIT_BEFORE_EXPANSION) {
+ BUFerr(BUF_F_BUF_MEM_GROW, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ n = (len + 3) / 3 * 4;
+ if ((str->flags & BUF_MEM_FLAG_SECURE))
+ ret = sec_alloc_realloc(str, n);
+ else
+ ret = OPENSSL_realloc(str->data, n);
+ if (ret == NULL) {
+ BUFerr(BUF_F_BUF_MEM_GROW, ERR_R_MALLOC_FAILURE);
+ len = 0;
+ } else {
+ str->data = ret;
+ str->max = n;
+ memset(&str->data[str->length], 0, len - str->length);
+ str->length = len;
+ }
+ return (len);
+}
-int BUF_MEM_grow_clean(BUF_MEM *str, size_t len)
- {
- char *ret;
- size_t n;
+size_t BUF_MEM_grow_clean(BUF_MEM *str, size_t len)
+{
+ char *ret;
+ size_t n;
- if (str->length >= len)
- {
- memset(&str->data[len],0,str->length-len);
- str->length=len;
- return(len);
- }
- if (str->max >= len)
- {
- memset(&str->data[str->length],0,len-str->length);
- str->length=len;
- return(len);
- }
- /* This limit is sufficient to ensure (len+3)/3*4 < 2**31 */
- if (len > LIMIT_BEFORE_EXPANSION)
- {
- BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE);
- return 0;
- }
- n=(len+3)/3*4;
- if (str->data == NULL)
- ret=OPENSSL_malloc(n);
- else
- ret=OPENSSL_realloc_clean(str->data,str->max,n);
- if (ret == NULL)
- {
- BUFerr(BUF_F_BUF_MEM_GROW_CLEAN,ERR_R_MALLOC_FAILURE);
- len=0;
- }
- else
- {
- str->data=ret;
- str->max=n;
- memset(&str->data[str->length],0,len-str->length);
- str->length=len;
- }
- return(len);
- }
+ if (str->length >= len) {
+ memset(&str->data[len], 0, str->length - len);
+ str->length = len;
+ return (len);
+ }
+ if (str->max >= len) {
+ memset(&str->data[str->length], 0, len - str->length);
+ str->length = len;
+ return (len);
+ }
+ /* This limit is sufficient to ensure (len+3)/3*4 < 2**31 */
+ if (len > LIMIT_BEFORE_EXPANSION) {
+ BUFerr(BUF_F_BUF_MEM_GROW_CLEAN, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ n = (len + 3) / 3 * 4;
+ if ((str->flags & BUF_MEM_FLAG_SECURE))
+ ret = sec_alloc_realloc(str, n);
+ else
+ ret = OPENSSL_realloc_clean(str->data, str->max, n);
+ if (ret == NULL) {
+ BUFerr(BUF_F_BUF_MEM_GROW_CLEAN, ERR_R_MALLOC_FAILURE);
+ len = 0;
+ } else {
+ str->data = ret;
+ str->max = n;
+ memset(&str->data[str->length], 0, len - str->length);
+ str->length = len;
+ }
+ return (len);
+}
void BUF_reverse(unsigned char *out, unsigned char *in, size_t size)
- {
- size_t i;
- if (in)
- {
- out += size - 1;
- for (i = 0; i < size; i++)
- *in++ = *out--;
- }
- else
- {
- unsigned char *q;
- char c;
- q = out + size - 1;
- for (i = 0; i < size/2; i++)
- {
- c = *q;
- *q-- = *out;
- *out++ = c;
- }
- }
- }
+{
+ size_t i;
+ if (in) {
+ out += size - 1;
+ for (i = 0; i < size; i++)
+ *out-- = *in++;
+ } else {
+ unsigned char *q;
+ char c;
+ q = out + size - 1;
+ for (i = 0; i < size / 2; i++) {
+ c = *q;
+ *q-- = *out;
+ *out++ = c;
+ }
+ }
+}
projects / openssl.git / blobdiff