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src/file_cab.c: add frama-c annotations

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This commit is contained in:
Christophe Grenier 2021-02-14 13:27:00 +01:00
parent f540f75938
commit b49eb471c5
1 changed files with 15 additions and 2 deletions
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17
src/file_cab.c
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@ -32,6 +32,7 @@
#include "common.h" #include "common.h"
#include "filegen.h" #include "filegen.h"
/*@ requires \valid(file_stat); */
static void register_header_check_cab(file_stat_t *file_stat); static void register_header_check_cab(file_stat_t *file_stat);
const file_hint_t file_hint_cab= { const file_hint_t file_hint_cab= {
@ -58,14 +59,26 @@ struct cab_header {
uint16_t number; uint16_t number;
} __attribute__ ((gcc_struct, __packed__)); } __attribute__ ((gcc_struct, __packed__));
/*@
@ requires buffer_size >= sizeof(struct cab_header) ;
@ 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_cab, buffer+(..), file_recovery, file_recovery_new);
@ assigns *file_recovery_new;
@ ensures \result == 0 || \result == 1;
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@*/
static int header_check_cab(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_cab(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)
{ {
const struct cab_header *cab_hdr=(const struct cab_header*)buffer; const struct cab_header *cab_hdr=(const struct cab_header*)buffer;
if(le16(cab_hdr->cab_version)==0x0103 && le32(cab_hdr->filesize) >= sizeof(struct cab_header)) const unsigned int filesize=le32(cab_hdr->filesize);
if(le16(cab_hdr->cab_version)==0x0103 && filesize >= sizeof(struct cab_header))
{ {
reset_file_recovery(file_recovery_new); reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_cab.extension; file_recovery_new->extension=file_hint_cab.extension;
file_recovery_new->calculated_file_size=(uint64_t)le32(cab_hdr->filesize); file_recovery_new->calculated_file_size=filesize;
file_recovery_new->data_check=&data_check_size; file_recovery_new->data_check=&data_check_size;
file_recovery_new->file_check=&file_check_size; file_recovery_new->file_check=&file_check_size;
return 1; return 1;