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src/file_rar.c: add Frama-C annotations

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This commit is contained in:
Christophe Grenier 2021-03-01 21:21:06 +01:00
parent 7bee17a15f
commit 72271a632f
1 changed files with 39 additions and 0 deletions
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39
src/file_rar.c
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@ -32,6 +32,7 @@
#include "filegen.h" #include "filegen.h"
/*@ requires \valid(file_stat); */
static void register_header_check_rar(file_stat_t *file_stat); static void register_header_check_rar(file_stat_t *file_stat);
const file_hint_t file_hint_rar= { const file_hint_t file_hint_rar= {
@ -45,12 +46,31 @@ const file_hint_t file_hint_rar= {
#define MHD_PASSWORD 0x0080U #define MHD_PASSWORD 0x0080U
/*@
@ requires valid_file_recovery(file_recovery);
@ requires \separated(file_recovery, file_recovery->handle, file_recovery->extension, &errno, &Frama_C_entropy_source);
@ requires file_recovery->file_check == &file_check_rar15fmt;
@ ensures \valid(file_recovery->handle);
@ assigns *file_recovery->handle, errno, file_recovery->file_size;
@ assigns Frama_C_entropy_source;
@*/
static void file_check_rar15fmt(file_recovery_t *file_recovery) static void file_check_rar15fmt(file_recovery_t *file_recovery)
{ {
static const unsigned char rar15fmt_footer[7]={0xc4, 0x3d, 0x7b, 0x00, 0x40, 0x07, 0x00 }; static const unsigned char rar15fmt_footer[7]={0xc4, 0x3d, 0x7b, 0x00, 0x40, 0x07, 0x00 };
file_search_footer(file_recovery, rar15fmt_footer, sizeof(rar15fmt_footer), 0); file_search_footer(file_recovery, rar15fmt_footer, sizeof(rar15fmt_footer), 0);
} }
/*@
@ requires buffer_size >= 0xb;
@ requires \valid_read(buffer+(0..buffer_size-1));
@ requires valid_file_recovery(file_recovery);
@ requires \valid(file_recovery_new);
@ requires file_recovery_new->blocksize > 0;
@ requires separation: \separated(&file_hint_rar, buffer+(..), file_recovery, file_recovery_new);
@ ensures \result == 0 || \result == 1;
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_rar15fmt(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new) static int header_check_rar15fmt(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
{ {
reset_file_recovery(file_recovery_new); reset_file_recovery(file_recovery_new);
@ -61,12 +81,31 @@ static int header_check_rar15fmt(const unsigned char *buffer, const unsigned int
return 1; return 1;
} }
/*@
@ requires valid_file_recovery(file_recovery);
@ requires \separated(file_recovery, file_recovery->handle, file_recovery->extension, &errno, &Frama_C_entropy_source);
@ requires file_recovery->file_check == &file_check_rar50fmt;
@ ensures \valid(file_recovery->handle);
@ assigns *file_recovery->handle, errno, file_recovery->file_size;
@ assigns Frama_C_entropy_source;
@*/
static void file_check_rar50fmt(file_recovery_t *file_recovery) static void file_check_rar50fmt(file_recovery_t *file_recovery)
{ {
static const unsigned char rar50fmt_footer[8]={0x1d, 0x77, 0x56, 0x51, 0x03, 0x05, 0x04, 0x00 }; static const unsigned char rar50fmt_footer[8]={0x1d, 0x77, 0x56, 0x51, 0x03, 0x05, 0x04, 0x00 };
file_search_footer(file_recovery, rar50fmt_footer, sizeof(rar50fmt_footer), 0); file_search_footer(file_recovery, rar50fmt_footer, sizeof(rar50fmt_footer), 0);
} }
/*@
@ requires buffer_size >= 0xb;
@ requires \valid_read(buffer+(0..buffer_size-1));
@ requires valid_file_recovery(file_recovery);
@ requires \valid(file_recovery_new);
@ requires file_recovery_new->blocksize > 0;
@ requires separation: \separated(&file_hint_rar, buffer+(..), file_recovery, file_recovery_new);
@ ensures \result == 0 || \result == 1;
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_rar50fmt(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new) static int header_check_rar50fmt(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
{ {
reset_file_recovery(file_recovery_new); reset_file_recovery(file_recovery_new);