core: New data flags "io-buffer-size" and "sensitive".

* src/data.c (_gpgme_data_release): Free buffers.
(gpgme_data_seek): Adjust from renamed fields.
(gpgme_data_set_flag): Implement new flags.
(_gpgme_data_inbound_handler): Allow the use of a malloced buffer.
(_gpgme_data_outbound_handler): Ditto.
* src/data.h (BUFFER_SIZE): Move out of the struct definition.
(struct gpgme_data): Remove pending filed and introduce inbound and
outbound fields.

* src/conversion.c (_gpgme_wipememory): New.  Taken from GnuPG.
* src/cJSON.c (wipememory): Use this here too.

* tests/run-decrypt.c (main): Add options "--large-buffers" and
"--sensitive".
--

GnuPG-bug-id: 5478
Signed-off-by: Werner Koch <[email protected]>

1 files changed, 11 insertions, 9 deletions

diff --git a/src/cJSON.c b/src/cJSON.c
index 7769b0eb..1925a04e 100644
--- a/src/cJSON.c
+++ b/src/cJSON.c
@@ -50,21 +50,13 @@
 
 #include "cJSON.h"
 
+
 /* Only use calloc. */
 #define CALLOC_ONLY 1
 
 /* Maximum recursion depth */
 #define MAX_DEPTH 512
 
-/* To avoid that a compiler optimizes certain memset calls away, these
-   macros may be used instead. */
-#define wipememory2(_ptr,_set,_len) do { \
-        volatile char *_vptr=(volatile char *)(_ptr); \
-        size_t _vlen=(_len); \
-        while(_vlen) { *_vptr=(_set); _vptr++; _vlen--; } \
-    } while(0)
-#define wipememory(_ptr,_len) wipememory2(_ptr,0,_len)
-
 /* We use malloc function wrappers from gpgrt (aka libgpg-error).  */
 #include <gpgrt.h>
 #define xtrycalloc(a,b) gpgrt_calloc ((a), (b))
@@ -77,6 +69,16 @@
 #endif
 
 
+static void
+wipememory (void *ptr, size_t len)
+{
+  /* Prevent compiler from optimizing away the call to memset by accessing
+   * memset through volatile pointer. */
+  static void *(*volatile memset_ptr)(void *, int, size_t) = (void *)memset;
+  memset_ptr (ptr, 0, len);
+}
+
+
 static int
 cJSON_strcasecmp (const char *s1, const char *s2)
 {