293 lines
6.9 KiB
C
293 lines
6.9 KiB
C
/** \ingroup rpmcli
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* \file lib/rpmchecksig.c
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* Verify the signature of a package.
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*/
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#include "system.h"
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#include <ctype.h>
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#include <rpm/rpmlib.h> /* RPMSIGTAG & related */
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#include <rpm/rpmpgp.h>
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#include <rpm/rpmcli.h>
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#include <rpm/rpmfileutil.h> /* rpmMkTemp() */
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#include <rpm/rpmsq.h>
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#include <rpm/rpmts.h>
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#include <rpm/rpmlog.h>
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#include <rpm/rpmstring.h>
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#include <rpm/rpmkeyring.h>
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#include "rpmio/rpmio_internal.h" /* fdSetBundle() */
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#include "lib/rpmlead.h"
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#include "lib/header_internal.h"
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#include "lib/rpmvs.h"
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#include "debug.h"
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static int doImport(rpmts ts, const char *fn, char *buf, ssize_t blen)
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{
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char const * const pgpmark = "-----BEGIN PGP ";
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size_t marklen = strlen(pgpmark);
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int res = 0;
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int keyno = 1;
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char *start = strstr(buf, pgpmark);
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do {
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uint8_t *pkt = NULL;
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uint8_t *pkti = NULL;
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size_t pktlen = 0;
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size_t certlen;
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/* Read pgp packet. */
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if (pgpParsePkts(start, &pkt, &pktlen) == PGPARMOR_PUBKEY) {
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pkti = pkt;
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/* Iterate over certificates in pkt */
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while (pktlen > 0) {
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if (pgpPubKeyCertLen(pkti, pktlen, &certlen)) {
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rpmlog(RPMLOG_ERR, _("%s: key %d import failed.\n"), fn,
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keyno);
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res++;
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break;
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}
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/* Import pubkey certificate. */
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if (rpmtsImportPubkey(ts, pkti, certlen) != RPMRC_OK) {
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rpmlog(RPMLOG_ERR, _("%s: key %d import failed.\n"), fn,
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keyno);
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res++;
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}
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pkti += certlen;
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pktlen -= certlen;
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}
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} else {
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rpmlog(RPMLOG_ERR, _("%s: key %d not an armored public key.\n"),
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fn, keyno);
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res++;
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}
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/* See if there are more keys in the buffer */
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if (start && start + marklen < buf + blen) {
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start = strstr(start + marklen, pgpmark);
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} else {
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start = NULL;
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}
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keyno++;
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free(pkt);
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} while (start != NULL);
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return res;
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}
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int rpmcliImportPubkeys(rpmts ts, ARGV_const_t argv)
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{
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int res = 0;
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for (ARGV_const_t arg = argv; arg && *arg; arg++) {
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const char *fn = *arg;
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uint8_t *buf = NULL;
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ssize_t blen = 0;
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char *t = NULL;
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int iorc;
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/* Read the file and try to import all contained keys */
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iorc = rpmioSlurp(fn, &buf, &blen);
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if (iorc || buf == NULL || blen < 64) {
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rpmlog(RPMLOG_ERR, _("%s: import read failed(%d).\n"), fn, iorc);
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res++;
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} else {
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res += doImport(ts, fn, (char *)buf, blen);
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}
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free(t);
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free(buf);
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}
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return res;
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}
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static int readFile(FD_t fd, char **msg)
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{
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unsigned char buf[4*BUFSIZ];
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ssize_t count;
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/* Read the payload from the package. */
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while ((count = Fread(buf, sizeof(buf[0]), sizeof(buf), fd)) > 0) {}
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if (count < 0)
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rasprintf(msg, _("Fread failed: %s"), Fstrerror(fd));
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return (count != 0);
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}
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struct vfydata_s {
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int seen;
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int bad;
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int verbose;
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};
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static int vfyCb(struct rpmsinfo_s *sinfo, void *cbdata)
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{
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struct vfydata_s *vd = cbdata;
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vd->seen |= sinfo->type;
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if (sinfo->rc != RPMRC_OK)
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vd->bad |= sinfo->type;
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if (vd->verbose) {
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char *vsmsg = rpmsinfoMsg(sinfo);
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rpmlog(RPMLOG_NOTICE, " %s\n", vsmsg);
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free(vsmsg);
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}
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return 1;
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}
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rpmRC rpmpkgRead(struct rpmvs_s *vs, FD_t fd,
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hdrblob *sigblobp, hdrblob *blobp, char **emsg)
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{
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char * msg = NULL;
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rpmRC xx, rc = RPMRC_FAIL; /* assume failure */
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hdrblob sigblob = hdrblobCreate();
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hdrblob blob = hdrblobCreate();
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rpmDigestBundle bundle = fdGetBundle(fd, 1); /* freed with fd */
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if ((xx = rpmLeadRead(fd, &msg)) != RPMRC_OK) {
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/* Avoid message spew on manifests */
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if (xx == RPMRC_NOTFOUND)
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msg = _free(msg);
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rc = xx;
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goto exit;
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}
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/* Read the signature header. Might not be in a contiguous region. */
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if (hdrblobRead(fd, 1, 0, RPMTAG_HEADERSIGNATURES, sigblob, &msg))
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goto exit;
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rpmvsInit(vs, sigblob, bundle);
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/* Initialize digests ranging over the header */
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rpmvsInitRange(vs, RPMSIG_HEADER);
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/* Read the header from the package. */
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if (hdrblobRead(fd, 1, 1, RPMTAG_HEADERIMMUTABLE, blob, &msg))
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goto exit;
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/* Finalize header range */
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rpmvsFiniRange(vs, RPMSIG_HEADER);
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/* Fish interesting tags from the main header. This is a bit hacky... */
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rpmvsAppendTag(vs, blob, RPMTAG_PAYLOADDIGEST);
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rpmvsAppendTag(vs, blob, RPMTAG_PAYLOADDIGESTALT);
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/* If needed and not explicitly disabled, read the payload as well. */
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if (rpmvsRange(vs) & RPMSIG_PAYLOAD) {
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/* Initialize digests ranging over the payload only */
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rpmvsInitRange(vs, RPMSIG_PAYLOAD);
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if (readFile(fd, &msg))
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goto exit;
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/* Finalize payload range */
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rpmvsFiniRange(vs, RPMSIG_PAYLOAD);
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rpmvsFiniRange(vs, RPMSIG_HEADER|RPMSIG_PAYLOAD);
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}
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if (sigblobp && blobp) {
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*sigblobp = sigblob;
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*blobp = blob;
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sigblob = NULL;
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blob = NULL;
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}
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rc = RPMRC_OK;
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exit:
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if (emsg)
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*emsg = msg;
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else
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free(msg);
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hdrblobFree(sigblob);
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hdrblobFree(blob);
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return rc;
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}
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static int rpmpkgVerifySigs(rpmKeyring keyring, int vfylevel, rpmVSFlags flags,
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FD_t fd, const char *fn)
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{
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char *msg = NULL;
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struct vfydata_s vd = { .seen = 0,
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.bad = 0,
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.verbose = rpmIsVerbose(),
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};
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int rc;
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struct rpmvs_s *vs = rpmvsCreate(vfylevel, flags, keyring);
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rpmlog(RPMLOG_NOTICE, "%s:%s", fn, vd.verbose ? "\n" : "");
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rc = rpmpkgRead(vs, fd, NULL, NULL, &msg);
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if (rc)
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goto exit;
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rc = rpmvsVerify(vs, RPMSIG_VERIFIABLE_TYPE, vfyCb, &vd);
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if (!vd.verbose) {
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if (vd.seen & RPMSIG_DIGEST_TYPE) {
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rpmlog(RPMLOG_NOTICE, " %s", (vd.bad & RPMSIG_DIGEST_TYPE) ?
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_("DIGESTS") : _("digests"));
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}
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if (vd.seen & RPMSIG_SIGNATURE_TYPE) {
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rpmlog(RPMLOG_NOTICE, " %s", (vd.bad & RPMSIG_SIGNATURE_TYPE) ?
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_("SIGNATURES") : _("signatures"));
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}
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rpmlog(RPMLOG_NOTICE, " %s\n", rc ? _("NOT OK") : _("OK"));
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}
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exit:
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if (rc && msg)
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rpmlog(RPMLOG_ERR, "%s: %s\n", Fdescr(fd), msg);
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rpmvsFree(vs);
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free(msg);
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return rc;
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}
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/* Wrapper around rpmkVerifySigs to preserve API */
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int rpmVerifySignatures(QVA_t qva, rpmts ts, FD_t fd, const char * fn)
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{
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int rc = 1; /* assume failure */
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if (ts && qva && fd && fn) {
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rpmKeyring keyring = rpmtsGetKeyring(ts, 1);
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rpmVSFlags vsflags = rpmtsVfyFlags(ts);
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int vfylevel = rpmtsVfyLevel(ts);
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rc = rpmpkgVerifySigs(keyring, vfylevel, vsflags, fd, fn);
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rpmKeyringFree(keyring);
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}
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return rc;
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}
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int rpmcliVerifySignatures(rpmts ts, ARGV_const_t argv)
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{
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const char * arg;
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int res = 0;
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rpmKeyring keyring = rpmtsGetKeyring(ts, 1);
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rpmVSFlags vsflags = rpmtsVfyFlags(ts);
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int vfylevel = rpmtsVfyLevel(ts);
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vsflags |= rpmcliVSFlags;
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if (rpmcliVfyLevelMask) {
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vfylevel &= ~rpmcliVfyLevelMask;
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rpmtsSetVfyLevel(ts, vfylevel);
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}
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while ((arg = *argv++) != NULL) {
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FD_t fd = Fopen(arg, "r.ufdio");
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if (fd == NULL || Ferror(fd)) {
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rpmlog(RPMLOG_ERR, _("%s: open failed: %s\n"),
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arg, Fstrerror(fd));
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res++;
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} else if (rpmpkgVerifySigs(keyring, vfylevel, vsflags, fd, arg)) {
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res++;
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}
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Fclose(fd);
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}
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rpmKeyringFree(keyring);
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return res;
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}
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