[Forensics-changes] [yara] 144/415: Fix handling of TEXT_STRINGS that contain \x00.
Hilko Bengen
bengen at moszumanska.debian.org
Thu Apr 3 05:42:56 UTC 2014
This is an automated email from the git hooks/post-receive script.
bengen pushed a commit to branch debian
in repository yara.
commit 783dd8defd6f32a8dc8c398b4775c442db8b0552
Author: Shane Huntley <shuntley at google.com>
Date: Fri Nov 16 19:06:05 2012 +0000
Fix handling of TEXT_STRINGS that contain \x00.
---
libyara/lex.c | 77 +++++++++++++++++++++++++++++++++++------------------------
libyara/lex.l | 2 +-
2 files changed, 47 insertions(+), 32 deletions(-)
diff --git a/libyara/lex.c b/libyara/lex.c
index dae9f33..19c7612 100644
--- a/libyara/lex.c
+++ b/libyara/lex.c
@@ -53,7 +53,6 @@ typedef int flex_int32_t;
typedef unsigned char flex_uint8_t;
typedef unsigned short int flex_uint16_t;
typedef unsigned int flex_uint32_t;
-#endif /* ! C99 */
/* Limits of integral types. */
#ifndef INT8_MIN
@@ -84,6 +83,8 @@ typedef unsigned int flex_uint32_t;
#define UINT32_MAX (4294967295U)
#endif
+#endif /* ! C99 */
+
#endif /* ! FLEXINT_H */
#ifdef __cplusplus
@@ -157,7 +158,15 @@ typedef void* yyscan_t;
/* Size of default input buffer. */
#ifndef YY_BUF_SIZE
+#ifdef __ia64__
+/* On IA-64, the buffer size is 16k, not 8k.
+ * Moreover, YY_BUF_SIZE is 2*YY_READ_BUF_SIZE in the general case.
+ * Ditto for the __ia64__ case accordingly.
+ */
+#define YY_BUF_SIZE 32768
+#else
#define YY_BUF_SIZE 16384
+#endif /* __ia64__ */
#endif
/* The state buf must be large enough to hold one state per character in the main buffer.
@@ -169,11 +178,6 @@ typedef void* yyscan_t;
typedef struct yy_buffer_state *YY_BUFFER_STATE;
#endif
-#ifndef YY_TYPEDEF_YY_SIZE_T
-#define YY_TYPEDEF_YY_SIZE_T
-typedef size_t yy_size_t;
-#endif
-
#define EOB_ACT_CONTINUE_SCAN 0
#define EOB_ACT_END_OF_FILE 1
#define EOB_ACT_LAST_MATCH 2
@@ -187,7 +191,7 @@ typedef size_t yy_size_t;
*/
#define YY_LESS_LINENO(n) \
do { \
- yy_size_t yyl;\
+ int yyl;\
for ( yyl = n; yyl < yyleng; ++yyl )\
if ( yytext[yyl] == '\n' )\
--yylineno;\
@@ -209,6 +213,11 @@ typedef size_t yy_size_t;
#define unput(c) yyunput( c, yyg->yytext_ptr , yyscanner )
+#ifndef YY_TYPEDEF_YY_SIZE_T
+#define YY_TYPEDEF_YY_SIZE_T
+typedef size_t yy_size_t;
+#endif
+
#ifndef YY_STRUCT_YY_BUFFER_STATE
#define YY_STRUCT_YY_BUFFER_STATE
struct yy_buffer_state
@@ -226,7 +235,7 @@ struct yy_buffer_state
/* Number of characters read into yy_ch_buf, not including EOB
* characters.
*/
- yy_size_t yy_n_chars;
+ int yy_n_chars;
/* Whether we "own" the buffer - i.e., we know we created it,
* and can realloc() it to grow it, and should free() it to
@@ -305,7 +314,7 @@ static void yy_init_buffer (YY_BUFFER_STATE b,FILE *file ,yyscan_t yyscanner );
YY_BUFFER_STATE yy_scan_buffer (char *base,yy_size_t size ,yyscan_t yyscanner );
YY_BUFFER_STATE yy_scan_string (yyconst char *yy_str ,yyscan_t yyscanner );
-YY_BUFFER_STATE yy_scan_bytes (yyconst char *bytes,yy_size_t len ,yyscan_t yyscanner );
+YY_BUFFER_STATE yy_scan_bytes (yyconst char *bytes,int len ,yyscan_t yyscanner );
void *yyalloc (yy_size_t ,yyscan_t yyscanner );
void *yyrealloc (void *,yy_size_t ,yyscan_t yyscanner );
@@ -690,7 +699,7 @@ POSSIBILITY OF SUCH DAMAGE.
-#line 694 "lex.c"
+#line 703 "lex.c"
#define INITIAL 0
#define str 1
@@ -722,8 +731,8 @@ struct yyguts_t
size_t yy_buffer_stack_max; /**< capacity of stack. */
YY_BUFFER_STATE * yy_buffer_stack; /**< Stack as an array. */
char yy_hold_char;
- yy_size_t yy_n_chars;
- yy_size_t yyleng_r;
+ int yy_n_chars;
+ int yyleng_r;
char *yy_c_buf_p;
int yy_init;
int yy_start;
@@ -776,7 +785,7 @@ FILE *yyget_out (yyscan_t yyscanner );
void yyset_out (FILE * out_str ,yyscan_t yyscanner );
-yy_size_t yyget_leng (yyscan_t yyscanner );
+int yyget_leng (yyscan_t yyscanner );
char *yyget_text (yyscan_t yyscanner );
@@ -822,7 +831,12 @@ static int input (yyscan_t yyscanner );
/* Amount of stuff to slurp up with each read. */
#ifndef YY_READ_BUF_SIZE
+#ifdef __ia64__
+/* On IA-64, the buffer size is 16k, not 8k */
+#define YY_READ_BUF_SIZE 16384
+#else
#define YY_READ_BUF_SIZE 8192
+#endif /* __ia64__ */
#endif
/* Copy whatever the last rule matched to the standard output. */
@@ -830,7 +844,7 @@ static int input (yyscan_t yyscanner );
/* This used to be an fputs(), but since the string might contain NUL's,
* we now use fwrite().
*/
-#define ECHO fwrite( yytext, yyleng, 1, yyout )
+#define ECHO do { if (fwrite( yytext, yyleng, 1, yyout )) {} } while (0)
#endif
/* Gets input and stuffs it into "buf". number of characters read, or YY_NULL,
@@ -841,7 +855,7 @@ static int input (yyscan_t yyscanner );
if ( YY_CURRENT_BUFFER_LVALUE->yy_is_interactive ) \
{ \
int c = '*'; \
- yy_size_t n; \
+ size_t n; \
for ( n = 0; n < max_size && \
(c = getc( yyin )) != EOF && c != '\n'; ++n ) \
buf[n] = (char) c; \
@@ -929,7 +943,7 @@ YY_DECL
#line 88 "lex.l"
-#line 933 "lex.c"
+#line 947 "lex.c"
yylval = yylval_param;
@@ -1005,7 +1019,7 @@ yy_find_action:
if ( yy_act != YY_END_OF_BUFFER && yy_rule_can_match_eol[yy_act] )
{
- yy_size_t yyl;
+ int yyl;
for ( yyl = 0; yyl < yyleng; ++yyl )
if ( yytext[yyl] == '\n' )
@@ -1491,7 +1505,7 @@ YY_RULE_SETUP
s->length = yyextra->lex_buf_len;
- strcpy(s->c_string, yyextra->lex_buf);
+ memcpy(s->c_string, yyextra->lex_buf, yyextra->lex_buf_len);
yylval->sized_string = s;
@@ -1663,7 +1677,7 @@ YY_RULE_SETUP
#line 442 "lex.l"
ECHO;
YY_BREAK
-#line 1667 "lex.c"
+#line 1681 "lex.c"
case YY_END_OF_BUFFER:
{
@@ -1848,7 +1862,7 @@ static int yy_get_next_buffer (yyscan_t yyscanner)
else
{
- yy_size_t num_to_read =
+ int num_to_read =
YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1;
while ( num_to_read <= 0 )
@@ -1862,7 +1876,7 @@ static int yy_get_next_buffer (yyscan_t yyscanner)
if ( b->yy_is_our_buffer )
{
- yy_size_t new_size = b->yy_buf_size * 2;
+ int new_size = b->yy_buf_size * 2;
if ( new_size <= 0 )
b->yy_buf_size += b->yy_buf_size / 8;
@@ -1893,7 +1907,7 @@ static int yy_get_next_buffer (yyscan_t yyscanner)
/* Read in more data. */
YY_INPUT( (&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move]),
- yyg->yy_n_chars, num_to_read );
+ yyg->yy_n_chars, (size_t) num_to_read );
YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars;
}
@@ -2006,7 +2020,7 @@ static int yy_get_next_buffer (yyscan_t yyscanner)
if ( yy_cp < YY_CURRENT_BUFFER_LVALUE->yy_ch_buf + 2 )
{ /* need to shift things up to make room */
/* +2 for EOB chars. */
- register yy_size_t number_to_move = yyg->yy_n_chars + 2;
+ register int number_to_move = yyg->yy_n_chars + 2;
register char *dest = &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[
YY_CURRENT_BUFFER_LVALUE->yy_buf_size + 2];
register char *source =
@@ -2060,7 +2074,7 @@ static int yy_get_next_buffer (yyscan_t yyscanner)
else
{ /* need more input */
- yy_size_t offset = yyg->yy_c_buf_p - yyg->yytext_ptr;
+ int offset = yyg->yy_c_buf_p - yyg->yytext_ptr;
++yyg->yy_c_buf_p;
switch ( yy_get_next_buffer( yyscanner ) )
@@ -2084,7 +2098,7 @@ static int yy_get_next_buffer (yyscan_t yyscanner)
case EOB_ACT_END_OF_FILE:
{
if ( yywrap(yyscanner ) )
- return 0;
+ return EOF;
if ( ! yyg->yy_did_buffer_switch_on_eof )
YY_NEW_FILE;
@@ -2351,7 +2365,7 @@ void yypop_buffer_state (yyscan_t yyscanner)
*/
static void yyensure_buffer_stack (yyscan_t yyscanner)
{
- yy_size_t num_to_alloc;
+ int num_to_alloc;
struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
if (!yyg->yy_buffer_stack) {
@@ -2444,16 +2458,17 @@ YY_BUFFER_STATE yy_scan_string (yyconst char * yystr , yyscan_t yyscanner)
/** Setup the input buffer state to scan the given bytes. The next call to yylex() will
* scan from a @e copy of @a bytes.
- * @param bytes the byte buffer to scan
- * @param len the number of bytes in the buffer pointed to by @a bytes.
+ * @param yybytes the byte buffer to scan
+ * @param _yybytes_len the number of bytes in the buffer pointed to by @a bytes.
* @param yyscanner The scanner object.
* @return the newly allocated buffer state object.
*/
-YY_BUFFER_STATE yy_scan_bytes (yyconst char * yybytes, yy_size_t _yybytes_len , yyscan_t yyscanner)
+YY_BUFFER_STATE yy_scan_bytes (yyconst char * yybytes, int _yybytes_len , yyscan_t yyscanner)
{
YY_BUFFER_STATE b;
char *buf;
- yy_size_t n, i;
+ yy_size_t n;
+ int i;
/* Get memory for full buffer, including space for trailing EOB's. */
n = _yybytes_len + 2;
@@ -2563,7 +2578,7 @@ FILE *yyget_out (yyscan_t yyscanner)
/** Get the length of the current token.
* @param yyscanner The scanner object.
*/
-yy_size_t yyget_leng (yyscan_t yyscanner)
+int yyget_leng (yyscan_t yyscanner)
{
struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
return yyleng;
diff --git a/libyara/lex.l b/libyara/lex.l
index 08b3200..1569e0f 100644
--- a/libyara/lex.l
+++ b/libyara/lex.l
@@ -330,7 +330,7 @@ $({letter}|{digit}|_)* {
s->length = yyextra->lex_buf_len;
- strcpy(s->c_string, yyextra->lex_buf);
+ memcpy(s->c_string, yyextra->lex_buf, yyextra->lex_buf_len);
yylval->sized_string = s;
--
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