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Merge branch 'pk3-xtra-comm-fix' into 'next'

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PK3: Proper ignorance for file comments/extra data

See merge request STJr/SRB2!761
This commit is contained in:
James R 2020-04-09 21:25:11 -04:00
commit d460e1e826
1 changed files with 38 additions and 18 deletions
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56
src/w_wad.c
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@ -523,8 +523,8 @@ typedef struct zlentry_s
static lumpinfo_t* ResGetLumpsZip (FILE* handle, UINT16* nlmp)
{
zend_t zend;
zentry_t* zentries;
zentry_t* zentry;
zentry_t zentry;
zlentry_t zlentry;
UINT16 numlumps = *nlmp;
lumpinfo_t* lumpinfo;
@ -552,40 +552,36 @@ static lumpinfo_t* ResGetLumpsZip (FILE* handle, UINT16* nlmp)
numlumps = zend.entries;
lump_p = lumpinfo = Z_Malloc(numlumps * sizeof (*lumpinfo), PU_STATIC, NULL);
zentry = zentries = malloc(numlumps * sizeof (*zentries));
fseek(handle, zend.cdiroffset, SEEK_SET);
for (i = 0; i < numlumps; i++, zentry++, lump_p++)
for (i = 0; i < numlumps; i++, lump_p++)
{
char* fullname;
char* trimname;
char* dotpos;
if (fread(zentry, 1, sizeof(zentry_t), handle) < sizeof(zentry_t))
if (fread(&zentry, 1, sizeof(zentry_t), handle) < sizeof(zentry_t))
{
CONS_Alert(CONS_ERROR, "Failed to read central directory (%s)\n", M_FileError(handle));
Z_Free(lumpinfo);
free(zentries);
return NULL;
}
if (memcmp(zentry->signature, pat_central, 4))
if (memcmp(zentry.signature, pat_central, 4))
{
CONS_Alert(CONS_ERROR, "Central directory is corrupt\n");
Z_Free(lumpinfo);
free(zentries);
return NULL;
}
lump_p->position = zentry->offset + zentry->namelen + zentry->xtralen + sizeof(zlentry_t);
lump_p->disksize = zentry->compsize;
lump_p->size = zentry->size;
lump_p->position = zentry.offset; // NOT ACCURATE YET: we still need to read the local entry to find our true position
lump_p->disksize = zentry.compsize;
lump_p->size = zentry.size;
fullname = malloc(zentry->namelen + 1);
if (fgets(fullname, zentry->namelen + 1, handle) != fullname)
fullname = malloc(zentry.namelen + 1);
if (fgets(fullname, zentry.namelen + 1, handle) != fullname)
{
CONS_Alert(CONS_ERROR, "Unable to read lumpname (%s)\n", M_FileError(handle));
Z_Free(lumpinfo);
free(zentries);
free(fullname);
return NULL;
}
@ -602,12 +598,12 @@ static lumpinfo_t* ResGetLumpsZip (FILE* handle, UINT16* nlmp)
memset(lump_p->name, '\0', 9); // Making sure they're initialized to 0. Is it necessary?
strncpy(lump_p->name, trimname, min(8, dotpos - trimname));
lump_p->name2 = Z_Calloc(zentry->namelen + 1, PU_STATIC, NULL);
strncpy(lump_p->name2, fullname, zentry->namelen);
lump_p->name2 = Z_Calloc(zentry.namelen + 1, PU_STATIC, NULL);
strncpy(lump_p->name2, fullname, zentry.namelen);
free(fullname);
switch(zentry->compression)
switch(zentry.compression)
{
case 0:
lump_p->compression = CM_NOCOMPRESSION;
@ -625,9 +621,29 @@ static lumpinfo_t* ResGetLumpsZip (FILE* handle, UINT16* nlmp)
lump_p->compression = CM_UNSUPPORTED;
break;
}
// skip and ignore comments/extra fields
if (fseek(handle, zentry.xtralen + zentry.commlen, SEEK_CUR) != 0)
{
CONS_Alert(CONS_ERROR, "Central directory is corrupt\n");
Z_Free(lumpinfo);
return NULL;
}
}
free(zentries);
// Adjust lump position values properly
for (i = 0, lump_p = lumpinfo; i < numlumps; i++, lump_p++)
{
// skip and ignore comments/extra fields
if ((fseek(handle, lump_p->position, SEEK_SET) != 0) || (fread(&zlentry, 1, sizeof(zlentry_t), handle) < sizeof(zlentry_t)))
{
CONS_Alert(CONS_ERROR, "Local headers for lump %s are corrupt\n", lump_p->name2);
Z_Free(lumpinfo);
return NULL;
}
lump_p->position += sizeof(zlentry_t) + zlentry.namelen + zlentry.xtralen;
}
*nlmp = numlumps;
return lumpinfo;
@ -1863,6 +1879,10 @@ W_VerifyPK3 (FILE *fp, lumpchecklist_t *checklist, boolean status)
}
free(fullname);
// skip and ignore comments/extra fields
if (fseek(fp, zentry.xtralen + zentry.commlen, SEEK_CUR) != 0)
return true;
}
return true;