278 lines
8.1 KiB
C
278 lines
8.1 KiB
C
/*-
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* Copyright (c) 2009-2015 Juan Romero Pardines.
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* Copyright (c) 2019 Duncan Overbruck <mail@duncano.de>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <errno.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "xbps_api_impl.h"
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#include "fetch.h"
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static int
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verify_binpkg(struct xbps_handle *xhp, xbps_dictionary_t pkgd)
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{
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struct xbps_repo *repo;
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const char *pkgver, *repoloc, *sha256;
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char *binfile;
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int rv = 0;
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xbps_dictionary_get_cstring_nocopy(pkgd, "repository", &repoloc);
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xbps_dictionary_get_cstring_nocopy(pkgd, "pkgver", &pkgver);
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binfile = xbps_repository_pkg_path(xhp, pkgd);
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if (binfile == NULL) {
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return ENOMEM;
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}
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/*
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* For pkgs in local repos check the sha256 hash.
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* For pkgs in remote repos check the RSA signature.
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*/
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if ((repo = xbps_rpool_get_repo(repoloc)) == NULL) {
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rv = errno;
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xbps_dbg_printf("%s: failed to get repository "
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"%s: %s\n", pkgver, repoloc, strerror(errno));
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goto out;
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}
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if (repo->is_remote) {
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/* remote repo */
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xbps_set_cb_state(xhp, XBPS_STATE_VERIFY, 0, pkgver,
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"%s: verifying RSA signature...", pkgver);
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if (!xbps_verify_file_signature(repo, binfile)) {
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char *sigfile;
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rv = EPERM;
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xbps_set_cb_state(xhp, XBPS_STATE_VERIFY_FAIL, rv, pkgver,
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"%s: the RSA signature is not valid!", pkgver);
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xbps_set_cb_state(xhp, XBPS_STATE_VERIFY_FAIL, rv, pkgver,
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"%s: removed pkg archive and its signature.", pkgver);
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(void)remove(binfile);
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sigfile = xbps_xasprintf("%s.sig2", binfile);
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(void)remove(sigfile);
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free(sigfile);
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goto out;
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}
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} else {
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/* local repo */
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xbps_set_cb_state(xhp, XBPS_STATE_VERIFY, 0, pkgver,
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"%s: verifying SHA256 hash...", pkgver);
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xbps_dictionary_get_cstring_nocopy(pkgd, "filename-sha256", &sha256);
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if ((rv = xbps_file_sha256_check(binfile, sha256)) != 0) {
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xbps_set_cb_state(xhp, XBPS_STATE_VERIFY_FAIL, rv, pkgver,
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"%s: SHA256 hash is not valid: %s", pkgver, strerror(rv));
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goto out;
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}
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}
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out:
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free(binfile);
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return rv;
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}
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static int
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download_binpkg(struct xbps_handle *xhp, xbps_dictionary_t repo_pkgd)
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{
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struct xbps_repo *repo;
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char buf[PATH_MAX];
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char *sigsuffix;
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const char *pkgver, *arch, *fetchstr, *repoloc;
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unsigned char digest[XBPS_SHA256_DIGEST_SIZE] = {0};
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int rv = 0;
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xbps_dictionary_get_cstring_nocopy(repo_pkgd, "repository", &repoloc);
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if (!xbps_repository_is_remote(repoloc))
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return ENOTSUP;
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xbps_dictionary_get_cstring_nocopy(repo_pkgd, "pkgver", &pkgver);
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xbps_dictionary_get_cstring_nocopy(repo_pkgd, "architecture", &arch);
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snprintf(buf, sizeof buf, "%s/%s.%s.xbps.sig2", repoloc, pkgver, arch);
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sigsuffix = buf+(strlen(buf)-sizeof (".sig2")+1);
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xbps_set_cb_state(xhp, XBPS_STATE_DOWNLOAD, 0, pkgver,
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"Downloading `%s' signature (from `%s')...", pkgver, repoloc);
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if ((rv = xbps_fetch_file(xhp, buf, NULL)) == -1) {
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rv = fetchLastErrCode ? fetchLastErrCode : errno;
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fetchstr = xbps_fetch_error_string();
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xbps_set_cb_state(xhp, XBPS_STATE_DOWNLOAD_FAIL, rv,
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pkgver, "[trans] failed to download `%s' signature from `%s': %s",
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pkgver, repoloc, fetchstr ? fetchstr : strerror(rv));
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return rv;
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}
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rv = 0;
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*sigsuffix = '\0';
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xbps_set_cb_state(xhp, XBPS_STATE_DOWNLOAD, 0, pkgver,
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"Downloading `%s' package (from `%s')...", pkgver, repoloc);
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if ((rv = xbps_fetch_file_sha256(xhp, buf, NULL, digest,
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sizeof digest)) == -1) {
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rv = fetchLastErrCode ? fetchLastErrCode : errno;
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fetchstr = xbps_fetch_error_string();
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xbps_set_cb_state(xhp, XBPS_STATE_DOWNLOAD_FAIL, rv,
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pkgver, "[trans] failed to download `%s' package from `%s': %s",
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pkgver, repoloc, fetchstr ? fetchstr : strerror(rv));
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return rv;
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}
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rv = 0;
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xbps_set_cb_state(xhp, XBPS_STATE_VERIFY, 0, pkgver,
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"%s: verifying RSA signature...", pkgver);
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snprintf(buf, sizeof buf, "%s/%s.%s.xbps.sig2", xhp->cachedir, pkgver, arch);
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sigsuffix = buf+(strlen(buf)-sizeof (".sig2")+1);
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if ((repo = xbps_rpool_get_repo(repoloc)) == NULL) {
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rv = errno;
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xbps_dbg_printf("%s: failed to get repository "
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"%s: %s\n", pkgver, repoloc, strerror(errno));
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return rv;
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}
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/*
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* If digest is not set, binary package was not downloaded,
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* i.e. 304 not modified, verify by file instead.
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*/
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if (fetchLastErrCode == FETCH_UNCHANGED) {
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*sigsuffix = '\0';
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if (!xbps_verify_file_signature(repo, buf)) {
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rv = EPERM;
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/* remove binpkg */
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(void)remove(buf);
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/* remove signature */
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*sigsuffix = '.';
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(void)remove(buf);
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}
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} else {
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if (!xbps_verify_signature(repo, buf, digest)) {
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rv = EPERM;
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/* remove signature */
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(void)remove(buf);
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/* remove binpkg */
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*sigsuffix = '\0';
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(void)remove(buf);
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}
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}
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if (rv == EPERM) {
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xbps_set_cb_state(xhp, XBPS_STATE_VERIFY_FAIL, rv, pkgver,
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"%s: the RSA signature is not valid!", pkgver);
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xbps_set_cb_state(xhp, XBPS_STATE_VERIFY_FAIL, rv, pkgver,
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"%s: removed pkg archive and its signature.", pkgver);
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}
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return rv;
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}
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int
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xbps_transaction_fetch(struct xbps_handle *xhp, xbps_object_iterator_t iter)
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{
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xbps_array_t fetch = NULL, verify = NULL;
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xbps_object_t obj;
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xbps_trans_type_t ttype;
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const char *repoloc;
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int rv = 0;
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unsigned int i, n;
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xbps_object_iterator_reset(iter);
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while ((obj = xbps_object_iterator_next(iter)) != NULL) {
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ttype = xbps_transaction_pkg_type(obj);
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if (ttype == XBPS_TRANS_REMOVE || ttype == XBPS_TRANS_HOLD ||
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ttype == XBPS_TRANS_CONFIGURE) {
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continue;
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}
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xbps_dictionary_get_cstring_nocopy(obj, "repository", &repoloc);
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/*
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* Download binary package and signature if either one
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* of them don't exist.
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*/
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if (xbps_repository_is_remote(repoloc) &&
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!xbps_remote_binpkg_exists(xhp, obj)) {
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if (!fetch && !(fetch = xbps_array_create())) {
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rv = errno;
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goto out;
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}
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xbps_array_add(fetch, obj);
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continue;
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}
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/*
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* Verify binary package from local repository or cache.
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*/
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if (!verify && !(verify = xbps_array_create())) {
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rv = errno;
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goto out;
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}
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xbps_array_add(verify, obj);
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}
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xbps_object_iterator_reset(iter);
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/*
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* Download binary packages (if they come from a remote repository)
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* and don't exist already.
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*/
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n = xbps_array_count(fetch);
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if (n) {
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xbps_set_cb_state(xhp, XBPS_STATE_TRANS_DOWNLOAD, 0, NULL, NULL);
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xbps_dbg_printf("[trans] downloading %d packages.\n", n);
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}
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for (i = 0; i < n; i++) {
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if ((rv = download_binpkg(xhp, xbps_array_get(fetch, i))) != 0) {
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xbps_dbg_printf("[trans] failed to download binpkgs: "
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"%s\n", strerror(rv));
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goto out;
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}
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}
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/*
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* Check binary package integrity.
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*/
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n = xbps_array_count(verify);
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if (n) {
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xbps_set_cb_state(xhp, XBPS_STATE_TRANS_VERIFY, 0, NULL, NULL);
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xbps_dbg_printf("[trans] verifying %d packages.\n", n);
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}
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for (i = 0; i < n; i++) {
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if ((rv = verify_binpkg(xhp, xbps_array_get(verify, i))) != 0) {
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xbps_dbg_printf("[trans] failed to check binpkgs: "
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"%s\n", strerror(rv));
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goto out;
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}
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}
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out:
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if (fetch)
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xbps_object_release(fetch);
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if (verify)
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xbps_object_release(verify);
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return rv;
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}
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