static rpmRC rpmpkgRead(rpmKeyring keyring, rpmVSFlags vsflags,
FD_t fd,
Header * hdrp, unsigned int *keyidp, char **msg)
{
pgpDigParams sig = NULL;
Header sigh = NULL;
rpmTagVal sigtag;
struct rpmtd_s sigtd;
struct sigtInfo_s sinfo;
Header h = NULL;
rpmRC rc = RPMRC_FAIL; /* assume failure */
int leadtype = -1;
headerGetFlags hgeflags = HEADERGET_DEFAULT;
if (hdrp) *hdrp = NULL;
rpmtdReset(&sigtd);
if ((rc = rpmLeadRead(fd, &leadtype, msg)) != RPMRC_OK) {
/* Avoid message spew on manifests */
if (rc == RPMRC_NOTFOUND) {
*msg = _free(*msg);
}
goto exit;
}
/* Read the signature header. */
rc = rpmReadSignature(fd, &sigh, msg);
if (rc != RPMRC_OK) {
goto exit;
}
#define _chk(_mask, _tag) \
(sigtag == 0 && !(vsflags & (_mask)) && headerIsEntry(sigh, (_tag)))
/*
* Figger the most effective means of verification available, prefer
* signatures over digests. Legacy header+payload entries are not used.
* DSA will be preferred over RSA if both exist because tested first.
*/
sigtag = 0;
if (_chk(RPMVSF_NODSAHEADER, RPMSIGTAG_DSA)) {
sigtag = RPMSIGTAG_DSA;
} else if (_chk(RPMVSF_NORSAHEADER, RPMSIGTAG_RSA)) {
sigtag = RPMSIGTAG_RSA;
} else if (_chk(RPMVSF_NOSHA1HEADER, RPMSIGTAG_SHA1)) {
sigtag = RPMSIGTAG_SHA1;
}
/* Read the metadata, computing digest(s) on the fly. */
h = NULL;
rc = rpmpkgReadHeader(fd, &h, msg);
if (rc != RPMRC_OK || h == NULL) {
goto exit;
}
/* Any digests or signatures to check? */
if (sigtag == 0) {
rc = RPMRC_OK;
goto exit;
}
/* Free up any previous "ok" message before signature/digest check */
*msg = _free(*msg);
/* Retrieve the tag parameters from the signature header. */
if (!headerGet(sigh, sigtag, &sigtd, hgeflags)) {
rc = RPMRC_FAIL;
goto exit;
}
if (rpmSigInfoParse(&sigtd, "package", &sinfo, &sig, msg) == RPMRC_OK) {
struct rpmtd_s utd;
DIGEST_CTX ctx = rpmDigestInit(sinfo.hashalgo, RPMDIGEST_NONE);
if (headerGet(h, RPMTAG_HEADERIMMUTABLE, &utd, hgeflags)) {
rpmDigestUpdate(ctx, rpm_header_magic, sizeof(rpm_header_magic));
rpmDigestUpdate(ctx, utd.data, utd.count);
rpmtdFreeData(&utd);
}
/** @todo Implement disable/enable/warn/error/anal policy. */
rc = rpmVerifySignature(keyring, &sigtd, sig, ctx, msg);
rpmDigestFinal(ctx, NULL, NULL, 0);
} else {
rc = RPMRC_FAIL;
}
exit:
if (rc != RPMRC_FAIL && h != NULL && hdrp != NULL) {
/* Retrofit RPMTAG_SOURCEPACKAGE to srpms for compatibility */
if (leadtype == RPMLEAD_SOURCE && headerIsSource(h)) {
if (!headerIsEntry(h, RPMTAG_SOURCEPACKAGE)) {
uint32_t one = 1;
headerPutUint32(h, RPMTAG_SOURCEPACKAGE, &one, 1);
}
}
/*
* Try to make sure binary rpms have RPMTAG_SOURCERPM set as that's
* what we use for differentiating binary vs source elsewhere.
*/
if (!headerIsEntry(h, RPMTAG_SOURCEPACKAGE) && headerIsSource(h)) {
headerPutString(h, RPMTAG_SOURCERPM, "(none)");
}
/*
* Convert legacy headers on the fly. Not having immutable region
* equals a truly ancient package, do full retrofit. OTOH newer
* packages might have been built with --nodirtokens, test and handle
* the non-compressed filelist case separately.
*/
if (!headerIsEntry(h, RPMTAG_HEADERIMMUTABLE))
headerConvert(h, HEADERCONV_RETROFIT_V3);
else if (headerIsEntry(h, RPMTAG_OLDFILENAMES))
headerConvert(h, HEADERCONV_COMPRESSFILELIST);
/* Append (and remap) signature tags to the metadata. */
headerMergeLegacySigs(h, sigh);
/* Bump reference count for return. */
*hdrp = headerLink(h);
if (keyidp)
*keyidp = getKeyid(sig);
}
rpmtdFreeData(&sigtd);
h = headerFree(h);
pgpDigParamsFree(sig);
sigh = headerFree(sigh);
return rc;
}
static int rpmpkgVerifySigs(rpmKeyring keyring, rpmQueryFlags flags,
FD_t fd, const char *fn)
{
char *buf = NULL;
char *missingKeys = NULL;
char *untrustedKeys = NULL;
struct rpmtd_s sigtd;
pgpDigParams sig = NULL;
Header sigh = NULL;
HeaderIterator hi = NULL;
char * msg = NULL;
int res = 1; /* assume failure */
rpmRC rc;
int failed = 0;
int nodigests = !(flags & VERIFY_DIGEST);
int nosignatures = !(flags & VERIFY_SIGNATURE);
struct sigtInfo_s sinfo;
rpmDigestBundle plbundle = rpmDigestBundleNew();
rpmDigestBundle hdrbundle = rpmDigestBundleNew();
if ((rc = rpmLeadRead(fd, NULL, NULL, &msg)) != RPMRC_OK) {
goto exit;
}
rc = rpmReadSignature(fd, &sigh, RPMSIGTYPE_HEADERSIG, &msg);
if (rc != RPMRC_OK) {
goto exit;
}
/* Initialize all digests we'll be needing */
hi = headerInitIterator(sigh);
for (; headerNext(hi, &sigtd) != 0; rpmtdFreeData(&sigtd)) {
rc = rpmSigInfoParse(&sigtd, "package", &sinfo, NULL, NULL);
if (nosignatures && sinfo.type == RPMSIG_SIGNATURE_TYPE)
continue;
if (nodigests && sinfo.type == RPMSIG_DIGEST_TYPE)
continue;
if (rc == RPMRC_OK && sinfo.hashalgo) {
rpmDigestBundleAdd(sinfo.payload ? plbundle : hdrbundle,
sinfo.hashalgo, RPMDIGEST_NONE);
}
}
hi = headerFreeIterator(hi);
/* Read the file, generating digest(s) on the fly. */
fdSetBundle(fd, plbundle);
if (readFile(fd, fn, plbundle, hdrbundle)) {
goto exit;
}
rasprintf(&buf, "%s:%c", fn, (rpmIsVerbose() ? '\n' : ' ') );
hi = headerInitIterator(sigh);
for (; headerNext(hi, &sigtd) != 0; rpmtdFreeData(&sigtd)) {
char *result = NULL;
DIGEST_CTX ctx = NULL;
if (sigtd.data == NULL) /* XXX can't happen */
continue;
/* Clean up parameters from previous sigtag. */
sig = pgpDigParamsFree(sig);
/* Note: we permit failures to be ignored via disablers */
rc = rpmSigInfoParse(&sigtd, "package", &sinfo, &sig, &result);
if (nosignatures && sinfo.type == RPMSIG_SIGNATURE_TYPE)
continue;
if (nodigests && sinfo.type == RPMSIG_DIGEST_TYPE)
continue;
if (sinfo.type == RPMSIG_OTHER_TYPE)
continue;
if (rc == RPMRC_OK) {
ctx = rpmDigestBundleDupCtx(sinfo.payload ? plbundle : hdrbundle,
sinfo.hashalgo);
rc = rpmVerifySignature(keyring, &sigtd, sig, ctx, &result);
rpmDigestFinal(ctx, NULL, NULL, 0);
}
if (result) {
formatResult(sigtd.tag, rc, result,
(rc == RPMRC_NOKEY ? &missingKeys : &untrustedKeys),
&buf);
free(result);
}
if (rc != RPMRC_OK) {
failed = 1;
}
}
res = failed;
if (rpmIsVerbose()) {
rpmlog(RPMLOG_NOTICE, "%s", buf);
} else {
const char *ok = (failed ? _("NOT OK") : _("OK"));
rpmlog(RPMLOG_NOTICE, "%s%s%s%s%s%s%s%s\n", buf, ok,
missingKeys ? _(" (MISSING KEYS:") : "",
missingKeys ? missingKeys : "",
missingKeys ? _(") ") : "",
untrustedKeys ? _(" (UNTRUSTED KEYS:") : "",
untrustedKeys ? untrustedKeys : "",
untrustedKeys ? _(")") : "");
}
free(missingKeys);
free(untrustedKeys);
exit:
if (res && msg != NULL)
rpmlog(RPMLOG_ERR, "%s: %s\n", fn, msg);
free(msg);
free(buf);
rpmDigestBundleFree(hdrbundle);
rpmDigestBundleFree(plbundle);
fdSetBundle(fd, NULL); /* XXX avoid double-free from fd close */
sigh = rpmFreeSignature(sigh);
hi = headerFreeIterator(hi);
pgpDigParamsFree(sig);
return res;
}
/*
* Argument monster to verify header-only signature/digest if there is
* one, otherwisereturn RPMRC_NOTFOUND to signal for plain sanity check.
*/
static rpmRC headerSigVerify(rpmKeyring keyring, rpmVSFlags vsflags,
hdrblob blob, char **buf)
{
rpmRC rc = RPMRC_FAIL;
pgpDigParams sig = NULL;
struct rpmtd_s sigtd;
struct entryInfo_s einfo;
struct sigtInfo_s sinfo;
rpmtdReset(&sigtd);
memset(&einfo, 0, sizeof(einfo));
/* Find a header-only digest/signature tag. */
for (int i = blob->ril; i < blob->il; i++) {
ei2h(blob->pe+i, &einfo);
switch (einfo.tag) {
case RPMTAG_SHA1HEADER:
if (vsflags & RPMVSF_NOSHA1HEADER)
break;
if (sigtd.tag == 0)
ei2td(&einfo, blob->dataStart, 0, &sigtd);
break;
case RPMTAG_RSAHEADER:
if (vsflags & RPMVSF_NORSAHEADER)
break;
ei2td(&einfo, blob->dataStart, einfo.count, &sigtd);
break;
case RPMTAG_DSAHEADER:
if (vsflags & RPMVSF_NODSAHEADER)
break;
ei2td(&einfo, blob->dataStart, einfo.count, &sigtd);
break;
default:
break;
}
}
/* No header-only digest/signature found, get outta here */
if (sigtd.tag == 0) {
rc = RPMRC_NOTFOUND;
goto exit;
}
if (rpmSigInfoParse(&sigtd, "header", &sinfo, &sig, buf))
goto exit;
if (sinfo.hashalgo) {
DIGEST_CTX ctx = rpmDigestInit(sinfo.hashalgo, RPMDIGEST_NONE);
int32_t ildl[2] = { htonl(blob->ril), htonl(blob->rdl) };
rpmDigestUpdate(ctx, rpm_header_magic, sizeof(rpm_header_magic));
rpmDigestUpdate(ctx, ildl, sizeof(ildl));
rpmDigestUpdate(ctx, blob->pe, (blob->ril * sizeof(*blob->pe)));
rpmDigestUpdate(ctx, blob->dataStart, blob->rdl);
rc = rpmVerifySignature(keyring, &sigtd, sig, ctx, buf);
rpmDigestFinal(ctx, NULL, NULL, 0);
}
exit:
rpmtdFreeData(&sigtd);
pgpDigParamsFree(sig);
return rc;
}
