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PhotoRec: stricter check for compressed swf files

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This commit is contained in:
Christophe Grenier 2020-06-17 13:55:45 +02:00
parent b660bb8c03
commit d895850d2f
1 changed files with 4 additions and 2 deletions
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6
src/file_swf.c
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@ -192,11 +192,13 @@ static int header_check_swf(const unsigned char *buffer, const unsigned int buff
static int header_check_swfz(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 swfz_header *hdr=(const struct swfz_header *)buffer;
if(hdr->version < 11 || le32(hdr->compressedLen) < 6)
const unsigned int compressedLen=le32(hdr->compressedLen);
/* ZWS file compression is permitted in SWF 13 or later only. */
if(hdr->version < 13 || hdr->version > 50 || compressedLen < 6)
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_swf.extension;
file_recovery_new->calculated_file_size=(uint64_t)4+4+4+5+le32(hdr->compressedLen);
file_recovery_new->calculated_file_size=(uint64_t)4+4+4+5+compressedLen;
file_recovery_new->data_check=&data_check_size;
file_recovery_new->file_check=&file_check_size_max;
return 1;