/** \ingroup header
* Read (and load) header from file handle.
* @param fd file handle
* @param magicp read (and verify) 8 bytes of (magic, 0)?
* @return header (or NULL on error)
*/
Header headerRead(FD_t fd, enum hMagic magicp)
{
int32_t block[4];
int32_t reserved;
int32_t * ei = NULL;
int32_t il;
int32_t dl;
int32_t magic;
Header h = NULL;
size_t len;
int i;
memset(block, 0, sizeof(block));
i = 2;
if (magicp == HEADER_MAGIC_YES)
i += 2;
/* FIX: cast? */
if (timedRead(fd, (char *)block, i*sizeof(*block)) != (i * sizeof(*block)))
goto exit;
i = 0;
if (magicp == HEADER_MAGIC_YES) {
magic = block[i++];
if (memcmp(&magic, rpm_header_magic, sizeof(magic)))
goto exit;
reserved = block[i++];
}
il = ntohl(block[i]); i++;
dl = ntohl(block[i]); i++;
len = sizeof(il) + sizeof(dl) + (il * sizeof(struct entryInfo_s)) + dl;
/* Sanity checks on header intro. */
if (hdrchkTags(il) || hdrchkData(dl) || len > headerMaxbytes)
goto exit;
ei = xmalloc(len);
ei[0] = htonl(il);
ei[1] = htonl(dl);
len -= sizeof(il) + sizeof(dl);
/* FIX: cast? */
if (timedRead(fd, (char *)&ei[2], len) != len)
goto exit;
h = headerLoad(ei);
exit:
if (h == NULL && ei != NULL) {
free(ei);
}
return h;
}
Header headerRead(FD_t fd, int magicp)
{
int32_t block[4];
int32_t * ei = NULL;
int32_t il;
int32_t dl;
Header h = NULL;
unsigned int len, blen;
if (magicp == HEADER_MAGIC_YES) {
int32_t magic;
if (Freadall(fd, block, 4*sizeof(*block)) != 4*sizeof(*block))
goto exit;
magic = block[0];
if (memcmp(&magic, rpm_header_magic, sizeof(magic)))
goto exit;
il = ntohl(block[2]);
dl = ntohl(block[3]);
} else {
if (Freadall(fd, block, 2*sizeof(*block)) != 2*sizeof(*block))
goto exit;
il = ntohl(block[0]);
dl = ntohl(block[1]);
}
blen = (il * sizeof(struct entryInfo_s)) + dl;
len = sizeof(il) + sizeof(dl) + blen;
/* Sanity checks on header intro. */
if (hdrchkTags(il) || hdrchkData(dl) || len > headerMaxbytes)
goto exit;
ei = xmalloc(len);
ei[0] = htonl(il);
ei[1] = htonl(dl);
if (Freadall(fd, (char *)&ei[2], blen) != blen)
goto exit;
h = headerImport(ei, len, 0);
exit:
if (h == NULL && ei != NULL) {
free(ei);
}
return h;
}
Header headerCopyLoad(const void * uh)
{
int32_t * ei = (int32_t *) uh;
int32_t il = ntohl(ei[0]); /* index length */
int32_t dl = ntohl(ei[1]); /* data length */
size_t pvlen = sizeof(il) + sizeof(dl) +
(il * sizeof(struct entryInfo_s)) + dl;
void * nuh = NULL;
Header h = NULL;
/* Sanity checks on header intro. */
if (!(hdrchkTags(il) || hdrchkData(dl)) && pvlen < headerMaxbytes) {
nuh = memcpy(xmalloc(pvlen), uh, pvlen);
if ((h = headerLoad(nuh)) == NULL)
nuh = _free(nuh);
}
return h;
}
Header headerImport(void * blob, unsigned int bsize, headerImportFlags flags)
{
const int32_t * ei = (int32_t *) blob;
int32_t il = ntohl(ei[0]); /* index length */
int32_t dl = ntohl(ei[1]); /* data length */
unsigned int pvlen = sizeof(il) + sizeof(dl) +
(il * sizeof(struct entryInfo_s)) + dl;;
Header h = NULL;
entryInfo pe;
unsigned char * dataStart;
unsigned char * dataEnd;
indexEntry entry;
int rdlen;
int fast = (flags & HEADERIMPORT_FAST);
/* Sanity checks on header intro. */
if (bsize && bsize != pvlen)
goto errxit;
if (hdrchkTags(il) || hdrchkData(dl) || pvlen >= headerMaxbytes)
goto errxit;
h = headerCreate(blob, (flags & HEADERIMPORT_COPY) ? pvlen : 0, il);
ei = h->blob; /* In case we had to copy */
pe = (entryInfo) &ei[2];
dataStart = (unsigned char *) (pe + il);
dataEnd = dataStart + dl;
entry = h->index;
if (!(htonl(pe->tag) < RPMTAG_HEADERI18NTABLE)) {
h->flags |= HEADERFLAG_LEGACY;
entry->info.type = REGION_TAG_TYPE;
entry->info.tag = RPMTAG_HEADERIMAGE;
entry->info.count = REGION_TAG_COUNT;
entry->info.offset = ((unsigned char *)pe - dataStart); /* negative offset */
entry->data = pe;
entry->length = pvlen - sizeof(il) - sizeof(dl);
rdlen = regionSwab(entry+1, il, 0, pe,
dataStart, dataEnd, entry->info.offset, fast);
if (rdlen != dl)
goto errxit;
entry->rdlen = rdlen;
h->indexUsed++;
} else {
int32_t rdl;
int32_t ril;
h->flags &= ~HEADERFLAG_LEGACY;
entry->info.type = htonl(pe->type);
entry->info.count = htonl(pe->count);
entry->info.tag = htonl(pe->tag);
if (!ENTRY_IS_REGION(entry))
goto errxit;
if (entry->info.type != REGION_TAG_TYPE)
goto errxit;
if (entry->info.count != REGION_TAG_COUNT)
goto errxit;
{ int off = ntohl(pe->offset);
if (off) {
size_t nb = REGION_TAG_COUNT;
int32_t stei[nb];
if (hdrchkRange(dl, (off + nb)))
goto errxit;
/* XXX Hmm, why the copy? */
memcpy(&stei, dataStart + off, nb);
rdl = -ntohl(stei[2]); /* negative offset */
ril = rdl/sizeof(*pe);
if (hdrchkTags(ril) || hdrchkData(rdl))
goto errxit;
} else {
ril = il;
rdl = (ril * sizeof(struct entryInfo_s));
entry->info.tag = RPMTAG_HEADERIMAGE;
}
}
entry->info.offset = -rdl; /* negative offset */
entry->data = pe;
entry->length = pvlen - sizeof(il) - sizeof(dl);
rdlen = regionSwab(entry+1, ril-1, 0, pe+1,
dataStart, dataEnd, entry->info.offset, fast);
if (rdlen < 0)
goto errxit;
entry->rdlen = rdlen;
if (ril < h->indexUsed) {
indexEntry newEntry = entry + ril;
int ne = (h->indexUsed - ril);
int rid = entry->info.offset+1;
/* Load dribble entries from region. */
rdlen = regionSwab(newEntry, ne, rdlen, pe+ril,
dataStart, dataEnd, rid, fast);
if (rdlen < 0)
goto errxit;
{ indexEntry firstEntry = newEntry;
int save = h->indexUsed;
int j;
/* Dribble entries replace duplicate region entries. */
h->indexUsed -= ne;
for (j = 0; j < ne; j++, newEntry++) {
(void) headerDel(h, newEntry->info.tag);
if (newEntry->info.tag == RPMTAG_BASENAMES)
(void) headerDel(h, RPMTAG_OLDFILENAMES);
}
/* If any duplicate entries were replaced, move new entries down. */
if (h->indexUsed < (save - ne)) {
memmove(h->index + h->indexUsed, firstEntry,
(ne * sizeof(*entry)));
}
h->indexUsed += ne;
}
}
rdlen += REGION_TAG_COUNT;
if (rdlen != dl)
goto errxit;
}
/* Force sorting, dribble lookups can cause early sort on partial header */
h->sorted = HEADERSORT_NONE;
headerSort(h);
h->flags |= HEADERFLAG_ALLOCATED;
return h;
errxit:
if (h) {
if (flags & HEADERIMPORT_COPY)
free(h->blob);
free(h->index);
free(h);
}
return NULL;
}
void * headerExport(Header h, unsigned int *bsize)
{
int32_t * ei = NULL;
entryInfo pe;
char * dataStart;
char * te;
unsigned len, diff;
int32_t il = 0;
int32_t dl = 0;
indexEntry entry;
int i;
int drlen, ndribbles;
if (h == NULL) return NULL;
/* Sort entries by (offset,tag). */
headerUnsort(h);
/* Compute (il,dl) for all tags, including those deleted in region. */
drlen = ndribbles = 0;
for (i = 0, entry = h->index; i < h->indexUsed; i++, entry++) {
if (ENTRY_IS_REGION(entry)) {
int32_t rdl = -entry->info.offset; /* negative offset */
int32_t ril = rdl/sizeof(*pe);
int rid = entry->info.offset;
il += ril;
dl += entry->rdlen + entry->info.count;
/* XXX Legacy regions do not include the region tag and data. */
if (i == 0 && (h->flags & HEADERFLAG_LEGACY))
il += 1;
/* Skip rest of entries in region, but account for dribbles. */
for (; i < h->indexUsed && entry->info.offset <= rid+1; i++, entry++) {
if (entry->info.offset <= rid)
continue;
/* Alignment */
diff = alignDiff(entry->info.type, dl);
if (diff) {
drlen += diff;
dl += diff;
}
ndribbles++;
il++;
drlen += entry->length;
dl += entry->length;
}
i--;
entry--;
continue;
}
/* Ignore deleted drips. */
if (entry->data == NULL || entry->length <= 0)
continue;
/* Alignment */
dl += alignDiff(entry->info.type, dl);
il++;
dl += entry->length;
}
/* Sanity checks on header intro. */
if (hdrchkTags(il) || hdrchkData(dl))
goto errxit;
len = sizeof(il) + sizeof(dl) + (il * sizeof(*pe)) + dl;
ei = xmalloc(len);
ei[0] = htonl(il);
ei[1] = htonl(dl);
pe = (entryInfo) &ei[2];
dataStart = te = (char *) (pe + il);
for (i = 0, entry = h->index; i < h->indexUsed; i++, entry++) {
const char * src;
unsigned char *t;
int count;
int rdlen;
unsigned int diff;
if (entry->data == NULL || entry->length <= 0)
continue;
t = (unsigned char*)te;
pe->tag = htonl(entry->info.tag);
pe->type = htonl(entry->info.type);
pe->count = htonl(entry->info.count);
if (ENTRY_IS_REGION(entry)) {
int32_t rdl = -entry->info.offset; /* negative offset */
int32_t ril = rdl/sizeof(*pe) + ndribbles;
int rid = entry->info.offset;
src = (char *)entry->data;
rdlen = entry->rdlen;
/* XXX Legacy regions do not include the region tag and data. */
if (i == 0 && (h->flags & HEADERFLAG_LEGACY)) {
int32_t stei[4];
memcpy(pe+1, src, rdl);
memcpy(te, src + rdl, rdlen);
te += rdlen;
pe->offset = htonl(te - dataStart);
stei[0] = pe->tag;
stei[1] = pe->type;
stei[2] = htonl(-rdl-entry->info.count);
stei[3] = pe->count;
memcpy(te, stei, entry->info.count);
te += entry->info.count;
ril++;
rdlen += entry->info.count;
count = regionSwab(NULL, ril, 0, pe, t, NULL, 0, 0);
if (count != rdlen)
goto errxit;
} else {
memcpy(pe+1, src + sizeof(*pe), ((ril-1) * sizeof(*pe)));
memcpy(te, src + (ril * sizeof(*pe)), rdlen+entry->info.count+drlen);
te += rdlen;
{
entryInfo se = (entryInfo)src;
int off = ntohl(se->offset);
pe->offset = (off) ? htonl(te - dataStart) : htonl(off);
}
te += entry->info.count + drlen;
count = regionSwab(NULL, ril, 0, pe, t, NULL, 0, 0);
if (count != (rdlen + entry->info.count + drlen))
goto errxit;
}
/* Skip rest of entries in region. */
while (i < h->indexUsed && entry->info.offset <= rid+1) {
i++;
entry++;
}
i--;
entry--;
pe += ril;
continue;
}
/* Ignore deleted drips. */
if (entry->data == NULL || entry->length <= 0)
continue;
/* Alignment */
diff = alignDiff(entry->info.type, (te - dataStart));
if (diff) {
memset(te, 0, diff);
te += diff;
}
pe->offset = htonl(te - dataStart);
/* copy data w/ endian conversions */
switch (entry->info.type) {
case RPM_INT64_TYPE:
count = entry->info.count;
src = entry->data;
while (count--) {
*((uint64_t *)te) = htonll(*((uint64_t *)src));
te += sizeof(uint64_t);
src += sizeof(uint64_t);
}
break;
case RPM_INT32_TYPE:
count = entry->info.count;
src = entry->data;
while (count--) {
*((int32_t *)te) = htonl(*((int32_t *)src));
te += sizeof(int32_t);
src += sizeof(int32_t);
}
break;
case RPM_INT16_TYPE:
count = entry->info.count;
src = entry->data;
while (count--) {
*((int16_t *)te) = htons(*((int16_t *)src));
te += sizeof(int16_t);
src += sizeof(int16_t);
}
break;
default:
memcpy(te, entry->data, entry->length);
te += entry->length;
break;
}
pe++;
}
/* Insure that there are no memcpy underruns/overruns. */
if (((char *)pe) != dataStart)
goto errxit;
if ((((char *)ei)+len) != te)
goto errxit;
if (bsize)
*bsize = len;
headerSort(h);
return (void *) ei;
errxit:
free(ei);
return NULL;
}
Header headerLoad(void * uh)
{
int32_t * ei = (int32_t *) uh;
int32_t il = ntohl(ei[0]); /* index length */
int32_t dl = ntohl(ei[1]); /* data length */
size_t pvlen = sizeof(il) + sizeof(dl) +
(il * sizeof(struct entryInfo_s)) + dl;
void * pv = uh;
Header h = NULL;
entryInfo pe;
unsigned char * dataStart;
unsigned char * dataEnd;
indexEntry entry;
int rdlen;
/* Sanity checks on header intro. */
if (hdrchkTags(il) || hdrchkData(dl))
goto errxit;
ei = (int32_t *) pv;
pe = (entryInfo) &ei[2];
dataStart = (unsigned char *) (pe + il);
dataEnd = dataStart + dl;
h = xcalloc(1, sizeof(*h));
h->blob = uh;
h->indexAlloced = il + 1;
h->indexUsed = il;
h->instance = 0;
h->index = xcalloc(h->indexAlloced, sizeof(*h->index));
h->flags |= HEADERFLAG_SORTED;
h->nrefs = 0;
h = headerLink(h);
entry = h->index;
if (!(htonl(pe->tag) < HEADER_I18NTABLE)) {
h->flags |= HEADERFLAG_LEGACY;
entry->info.type = REGION_TAG_TYPE;
entry->info.tag = HEADER_IMAGE;
entry->info.count = REGION_TAG_COUNT;
entry->info.offset = ((unsigned char *)pe - dataStart); /* negative offset */
entry->data = pe;
entry->length = pvlen - sizeof(il) - sizeof(dl);
rdlen = regionSwab(entry+1, il, 0, pe, dataStart, dataEnd, entry->info.offset);
if (rdlen != dl)
goto errxit;
entry->rdlen = rdlen;
h->indexUsed++;
} else {
int32_t rdl;
int32_t ril;
h->flags &= ~HEADERFLAG_LEGACY;
entry->info.type = htonl(pe->type);
entry->info.count = htonl(pe->count);
if (hdrchkType(entry->info.type))
goto errxit;
if (hdrchkTags(entry->info.count))
goto errxit;
{ int off = ntohl(pe->offset);
if (hdrchkData(off))
goto errxit;
if (off) {
size_t nb = REGION_TAG_COUNT;
int32_t stei[nb];
/* XXX Hmm, why the copy? */
memcpy(&stei, dataStart + off, nb);
rdl = -ntohl(stei[2]); /* negative offset */
ril = rdl/sizeof(*pe);
if (hdrchkTags(ril) || hdrchkData(rdl))
goto errxit;
entry->info.tag = htonl(pe->tag);
} else {
ril = il;
rdl = (ril * sizeof(struct entryInfo_s));
entry->info.tag = HEADER_IMAGE;
}
}
entry->info.offset = -rdl; /* negative offset */
entry->data = pe;
entry->length = pvlen - sizeof(il) - sizeof(dl);
rdlen = regionSwab(entry+1, ril-1, 0, pe+1, dataStart, dataEnd, entry->info.offset);
if (rdlen < 0)
goto errxit;
entry->rdlen = rdlen;
if (ril < h->indexUsed) {
indexEntry newEntry = entry + ril;
int ne = (h->indexUsed - ril);
int rid = entry->info.offset+1;
int rc;
/* Load dribble entries from region. */
rc = regionSwab(newEntry, ne, 0, pe+ril, dataStart, dataEnd, rid);
if (rc < 0)
goto errxit;
rdlen += rc;
{ indexEntry firstEntry = newEntry;
int save = h->indexUsed;
int j;
/* Dribble entries replace duplicate region entries. */
h->indexUsed -= ne;
for (j = 0; j < ne; j++, newEntry++) {
(void) headerDel(h, newEntry->info.tag);
if (newEntry->info.tag == RPMTAG_BASENAMES)
(void) headerDel(h, RPMTAG_OLDFILENAMES);
}
/* If any duplicate entries were replaced, move new entries down. */
if (h->indexUsed < (save - ne)) {
memmove(h->index + h->indexUsed, firstEntry,
(ne * sizeof(*entry)));
}
h->indexUsed += ne;
}
}
}
h->flags &= ~HEADERFLAG_SORTED;
headerSort(h);
h->flags |= HEADERFLAG_ALLOCATED;
return h;
errxit:
if (h) {
h->index = _free(h->index);
h = _free(h);
}
return h;
}
static rpmRC rpmpkgReadHeader(rpmKeyring keyring, rpmVSFlags vsflags,
FD_t fd, Header *hdrp, char ** msg)
{
char *buf = NULL;
int32_t block[4];
int32_t il;
int32_t dl;
int32_t * ei = NULL;
size_t uc;
size_t nb;
Header h = NULL;
rpmRC rc = RPMRC_FAIL; /* assume failure */
int xx;
if (hdrp)
*hdrp = NULL;
if (msg)
*msg = NULL;
memset(block, 0, sizeof(block));
if ((xx = timedRead(fd, (char *)block, sizeof(block))) != sizeof(block)) {
rasprintf(&buf,
_("hdr size(%d): BAD, read returned %d\n"), (int)sizeof(block), xx);
goto exit;
}
if (memcmp(block, rpm_header_magic, sizeof(rpm_header_magic))) {
rasprintf(&buf, _("hdr magic: BAD\n"));
goto exit;
}
il = ntohl(block[2]);
if (hdrchkTags(il)) {
rasprintf(&buf, _("hdr tags: BAD, no. of tags(%d) out of range\n"), il);
goto exit;
}
dl = ntohl(block[3]);
if (hdrchkData(dl)) {
rasprintf(&buf,
_("hdr data: BAD, no. of bytes(%d) out of range\n"), dl);
goto exit;
}
nb = (il * sizeof(struct entryInfo_s)) + dl;
uc = sizeof(il) + sizeof(dl) + nb;
ei = xmalloc(uc);
ei[0] = block[2];
ei[1] = block[3];
if ((xx = timedRead(fd, (char *)&ei[2], nb)) != nb) {
rasprintf(&buf, _("hdr blob(%zd): BAD, read returned %d\n"), nb, xx);
goto exit;
}
/* Sanity check header tags */
rc = headerVerify(keyring, vsflags, ei, uc, msg);
if (rc != RPMRC_OK)
goto exit;
/* OK, blob looks sane, load the header. */
h = headerLoad(ei);
if (h == NULL) {
rasprintf(&buf, _("hdr load: BAD\n"));
rc = RPMRC_FAIL;
goto exit;
}
ei = NULL; /* XXX will be freed with header */
exit:
if (hdrp && h && rc == RPMRC_OK)
*hdrp = headerLink(h);
ei = _free(ei);
h = headerFree(h);
if (msg != NULL && *msg == NULL && buf != NULL) {
*msg = buf;
} else {
free(buf);
}
return rc;
}
