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 headerReload(Header h, rpmTagVal tag)
{
Header nh;
unsigned int uc = 0;
void * uh = headerExport(h, &uc);
h = headerFree(h);
if (uh == NULL)
return NULL;
nh = headerImport(uh, uc, 0);
if (nh == NULL) {
uh = _free(uh);
return NULL;
}
if (ENTRY_IS_REGION(nh->index)) {
if (tag == RPMTAG_HEADERSIGNATURES || tag == RPMTAG_HEADERIMMUTABLE)
nh->index[0].info.tag = tag;
}
return nh;
}
rpmRC rpmReadSignature(FD_t fd, Header * sighp, sigType sig_type, char ** msg)
{
char *buf = NULL;
int32_t block[4];
int32_t il;
int32_t dl;
int32_t * ei = NULL;
entryInfo pe;
unsigned int nb, uc;
int32_t ril = 0;
struct indexEntry_s entry;
struct entryInfo_s info;
unsigned char * dataStart;
unsigned char * dataEnd = NULL;
Header sigh = NULL;
rpmRC rc = RPMRC_FAIL; /* assume failure */
int xx;
int i;
if (sighp)
*sighp = NULL;
if (sig_type != RPMSIGTYPE_HEADERSIG)
goto exit;
memset(block, 0, sizeof(block));
if ((xx = Fread(block, 1, sizeof(block), fd)) != sizeof(block)) {
rasprintf(&buf, _("sigh 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, _("sigh magic: BAD\n"));
goto exit;
}
il = ntohl(block[2]);
if (il < 0 || il > 32) {
rasprintf(&buf,
_("sigh tags: BAD, no. of tags(%d) out of range\n"), il);
goto exit;
}
dl = ntohl(block[3]);
if (dl < 0 || dl > 8192) {
rasprintf(&buf,
_("sigh data: BAD, no. of bytes(%d) out of range\n"), dl);
goto exit;
}
memset(&entry, 0, sizeof(entry));
memset(&info, 0, sizeof(info));
nb = (il * sizeof(struct entryInfo_s)) + dl;
uc = sizeof(il) + sizeof(dl) + nb;
ei = xmalloc(uc);
ei[0] = block[2];
ei[1] = block[3];
pe = (entryInfo) &ei[2];
dataStart = (unsigned char *) (pe + il);
if ((xx = Fread(pe, 1, nb, fd)) != nb) {
rasprintf(&buf,
_("sigh blob(%d): BAD, read returned %d\n"), (int)nb, xx);
goto exit;
}
/* Check (and convert) the 1st tag element. */
xx = headerVerifyInfo(1, dl, pe, &entry.info, 0);
if (xx != -1) {
rasprintf(&buf, _("tag[%d]: BAD, tag %d type %d offset %d count %d\n"),
0, entry.info.tag, entry.info.type,
entry.info.offset, entry.info.count);
goto exit;
}
/* Is there an immutable header region tag? */
if (entry.info.tag == RPMTAG_HEADERSIGNATURES) {
/* Is the region tag sane? */
if (!(entry.info.type == REGION_TAG_TYPE &&
entry.info.count == REGION_TAG_COUNT)) {
rasprintf(&buf,
_("region tag: BAD, tag %d type %d offset %d count %d\n"),
entry.info.tag, entry.info.type,
entry.info.offset, entry.info.count);
goto exit;
}
/* Is the trailer within the data area? */
if (entry.info.offset + REGION_TAG_COUNT > dl) {
rasprintf(&buf,
_("region offset: BAD, tag %d type %d offset %d count %d\n"),
entry.info.tag, entry.info.type,
entry.info.offset, entry.info.count);
goto exit;
}
/* Is there an immutable header region tag trailer? */
dataEnd = dataStart + entry.info.offset;
(void) memcpy(&info, dataEnd, REGION_TAG_COUNT);
/* XXX Really old packages have HEADER_IMAGE, not HEADER_SIGNATURES. */
if (info.tag == htonl(RPMTAG_HEADERIMAGE)) {
rpmTagVal stag = htonl(RPMTAG_HEADERSIGNATURES);
info.tag = stag;
memcpy(dataEnd, &stag, sizeof(stag));
}
dataEnd += REGION_TAG_COUNT;
xx = headerVerifyInfo(1, il * sizeof(*pe), &info, &entry.info, 1);
if (xx != -1 ||
!((entry.info.tag == RPMTAG_HEADERSIGNATURES || entry.info.tag == RPMTAG_HEADERIMAGE)
&& entry.info.type == REGION_TAG_TYPE
&& entry.info.count == REGION_TAG_COUNT))
{
rasprintf(&buf,
_("region trailer: BAD, tag %d type %d offset %d count %d\n"),
entry.info.tag, entry.info.type,
entry.info.offset, entry.info.count);
goto exit;
}
memset(&info, 0, sizeof(info));
/* Is the no. of tags in the region less than the total no. of tags? */
ril = entry.info.offset/sizeof(*pe);
if ((entry.info.offset % sizeof(*pe)) || ril > il) {
rasprintf(&buf, _("region size: BAD, ril(%d) > il(%d)\n"), ril, il);
goto exit;
}
}
/* Sanity check signature tags */
memset(&info, 0, sizeof(info));
for (i = 1; i < il; i++) {
xx = headerVerifyInfo(1, dl, pe+i, &entry.info, 0);
if (xx != -1) {
rasprintf(&buf,
_("sigh tag[%d]: BAD, tag %d type %d offset %d count %d\n"),
i, entry.info.tag, entry.info.type,
entry.info.offset, entry.info.count);
goto exit;
}
}
/* OK, blob looks sane, load the header. */
sigh = headerImport(ei, uc, 0);
if (sigh == NULL) {
rasprintf(&buf, _("sigh load: BAD\n"));
goto exit;
}
{ size_t sigSize = headerSizeof(sigh, HEADER_MAGIC_YES);
size_t pad = (8 - (sigSize % 8)) % 8; /* 8-byte pad */
ssize_t trc;
struct rpmtd_s sizetag;
rpm_loff_t archSize = 0;
/* Position at beginning of header. */
if (pad && (trc = Fread(block, 1, pad, fd)) != pad) {
rasprintf(&buf,
_("sigh pad(%zd): BAD, read %zd bytes\n"), pad, trc);
goto exit;
}
/* Print package component sizes. */
if (headerGet(sigh, RPMSIGTAG_LONGSIZE, &sizetag, HEADERGET_DEFAULT)) {
rpm_loff_t *tsize = rpmtdGetUint64(&sizetag);
archSize = (tsize) ? *tsize : 0;
} else if (headerGet(sigh, RPMSIGTAG_SIZE, &sizetag, HEADERGET_DEFAULT)) {
rpm_off_t *tsize = rpmtdGetUint32(&sizetag);
archSize = (tsize) ? *tsize : 0;
}
rpmtdFreeData(&sizetag);
rc = printSize(fd, sigSize, pad, archSize);
if (rc != RPMRC_OK) {
rasprintf(&buf,
_("sigh sigSize(%zd): BAD, fstat(2) failed\n"), sigSize);
goto exit;
}
}
ei = NULL; /* XXX will be freed with header */
exit:
if (sighp && sigh && rc == RPMRC_OK)
*sighp = headerLink(sigh);
headerFree(sigh);
free(ei);
if (msg != NULL) {
*msg = buf;
} else {
free(buf);
}
return rc;
}
Header headerCopyLoad(const void * uh)
{
/* Discards const but that's ok as we'll take a copy */
return headerImport((void *)uh, 0, HEADERIMPORT_COPY);
}
Header headerLoad(void * uh)
{
return headerImport(uh, 0, 0);
}
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 = Fread(block, 1, sizeof(block), fd)) != 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 = Fread((char *)&ei[2], 1, nb, fd)) != 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, &buf);
if (rc != RPMRC_OK)
goto exit;
/* OK, blob looks sane, load the header. */
h = headerImport(ei, uc, 0);
if (h == NULL) {
free(buf);
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);
free(ei);
headerFree(h);
if (msg != NULL && *msg == NULL && buf != NULL) {
*msg = buf;
} else {
free(buf);
}
return rc;
}
rpmRC rpmReadSignature(FD_t fd, Header * sighp, sigType sig_type, char ** msg)
{
char *buf = NULL;
int32_t block[4];
int32_t il;
int32_t dl;
int32_t * ei = NULL;
entryInfo pe;
unsigned int nb, uc;
struct indexEntry_s entry;
unsigned char * dataStart;
Header sigh = NULL;
rpmRC rc = RPMRC_FAIL; /* assume failure */
int xx;
int i;
if (sighp)
*sighp = NULL;
if (sig_type != RPMSIGTYPE_HEADERSIG)
goto exit;
memset(block, 0, sizeof(block));
if ((xx = Freadall(fd, block, sizeof(block))) != sizeof(block)) {
rasprintf(&buf, _("sigh size(%d): BAD, read returned %d"),
(int)sizeof(block), xx);
goto exit;
}
if (memcmp(block, rpm_header_magic, sizeof(rpm_header_magic))) {
rasprintf(&buf, _("sigh magic: BAD"));
goto exit;
}
il = ntohl(block[2]);
if (il < 0 || il > 32) {
rasprintf(&buf,
_("sigh tags: BAD, no. of tags(%d) out of range"), il);
goto exit;
}
dl = ntohl(block[3]);
if (dl < 0 || dl > 8192) {
rasprintf(&buf,
_("sigh data: BAD, no. of bytes(%d) out of range"), dl);
goto exit;
}
memset(&entry, 0, sizeof(entry));
nb = (il * sizeof(struct entryInfo_s)) + dl;
uc = sizeof(il) + sizeof(dl) + nb;
ei = xmalloc(uc);
ei[0] = block[2];
ei[1] = block[3];
pe = (entryInfo) &ei[2];
dataStart = (unsigned char *) (pe + il);
if ((xx = Freadall(fd, pe, nb)) != nb) {
rasprintf(&buf,
_("sigh blob(%d): BAD, read returned %d"), (int)nb, xx);
goto exit;
}
/* Verify header immutable region if there is one */
xx = headerVerifyRegion(RPMTAG_HEADERSIGNATURES,
&entry, il, dl, pe, dataStart,
NULL, NULL, &buf);
/* Not found means a legacy V3 package with no immutable region */
if (xx != RPMRC_OK && xx != RPMRC_NOTFOUND)
goto exit;
/* Sanity check signature tags */
for (i = 1; i < il; i++) {
xx = headerVerifyInfo(1, dl, pe+i, &entry.info, 0);
if (xx != -1) {
rasprintf(&buf,
_("sigh tag[%d]: BAD, tag %d type %d offset %d count %d"),
i, entry.info.tag, entry.info.type,
entry.info.offset, entry.info.count);
goto exit;
}
}
/* OK, blob looks sane, load the header. */
sigh = headerImport(ei, uc, 0);
if (sigh == NULL) {
rasprintf(&buf, _("sigh load: BAD"));
goto exit;
}
ei = NULL; /* XXX will be freed with header */
{ size_t sigSize = headerSizeof(sigh, HEADER_MAGIC_YES);
size_t pad = (8 - (sigSize % 8)) % 8; /* 8-byte pad */
ssize_t trc;
struct rpmtd_s sizetag;
rpm_loff_t archSize = 0;
/* Position at beginning of header. */
if (pad && (trc = Freadall(fd, block, pad)) != pad) {
rasprintf(&buf,
_("sigh pad(%zd): BAD, read %zd bytes"), pad, trc);
goto exit;
}
/* Print package component sizes. */
if (headerGet(sigh, RPMSIGTAG_LONGSIZE, &sizetag, HEADERGET_DEFAULT)) {
rpm_loff_t *tsize = rpmtdGetUint64(&sizetag);
archSize = (tsize) ? *tsize : 0;
} else if (headerGet(sigh, RPMSIGTAG_SIZE, &sizetag, HEADERGET_DEFAULT)) {
rpm_off_t *tsize = rpmtdGetUint32(&sizetag);
archSize = (tsize) ? *tsize : 0;
}
rpmtdFreeData(&sizetag);
rc = printSize(fd, sigSize, pad, archSize);
if (rc != RPMRC_OK) {
rasprintf(&buf,
_("sigh sigSize(%zd): BAD, fstat(2) failed"), sigSize);
goto exit;
}
}
exit:
if (sighp && sigh && rc == RPMRC_OK)
*sighp = headerLink(sigh);
headerFree(sigh);
free(ei);
if (msg != NULL) {
*msg = buf;
} else {
free(buf);
}
return rc;
}
