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chunk_cat/cata/create_cat/length accept the sensitive data clearing mode 's'

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This commit is contained in:
Martin Willi 2009-08-19 16:02:20 +02:00
parent 957d116328
commit 934d49a4f9
2 changed files with 19 additions and 10 deletions
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21
src/libstrongswan/chunk.c
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@ -72,6 +72,7 @@ size_t chunk_length(const char* mode, ...)
{
case 'm':
case 'c':
case 's':
{
chunk_t ch = va_arg(chunks, chunk_t);
length += ch.len;
@ -97,25 +98,31 @@ chunk_t chunk_create_cat(u_char *ptr, const char* mode, ...)
va_start(chunks, mode);
while (TRUE)
{
bool free_chunk = FALSE;
bool free_chunk = FALSE, clear_chunk = FALSE;
chunk_t ch;
switch (*mode++)
{
case 's':
clear_chunk = TRUE;
/* FALL */
case 'm':
{
free_chunk = TRUE;
}
/* FALL */
case 'c':
{
chunk_t ch = va_arg(chunks, chunk_t);
ch = va_arg(chunks, chunk_t);
memcpy(ptr, ch.ptr, ch.len);
ptr += ch.len;
construct.len += ch.len;
if (free_chunk)
if (clear_chunk)
{
chunk_clear(&ch);
}
else if (free_chunk)
{
free(ch.ptr);
}
continue;
}
default:
break;
}

8
src/libstrongswan/chunk.h
View File

@ -69,9 +69,11 @@ chunk_t chunk_create_clone(u_char *ptr, chunk_t chunk);
size_t chunk_length(const char *mode, ...);
/**
* Concatenate chunks into a chunk pointing to "ptr",
* "mode" is a string of "c" (copy) and "m" (move), which says
* how to handle the chunks in "..."
* Concatenate chunks into a chunk pointing to "ptr".
*
* The mode string specifies the number of chunks, and how to handle each of
* them with a single character: 'c' for copy (allocate new chunk), 'm' for move
* (free given chunk) or 's' for sensitive-move (clear given chunk, then free).
*/
chunk_t chunk_create_cat(u_char *ptr, const char* mode, ...);