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-rw-r--r--lib/libalpm/Makefile.am1
-rw-r--r--lib/libalpm/alpm.h10
-rw-r--r--lib/libalpm/error.c4
-rw-r--r--lib/libalpm/signing.c219
-rw-r--r--lib/libalpm/signing.h28
-rw-r--r--lib/libalpm/sync.c36
6 files changed, 282 insertions, 16 deletions
diff --git a/lib/libalpm/Makefile.am b/lib/libalpm/Makefile.am
index 7c411b2c..dc6d8516 100644
--- a/lib/libalpm/Makefile.am
+++ b/lib/libalpm/Makefile.am
@@ -43,6 +43,7 @@ libalpm_la_SOURCES = \
package.h package.c \
pkghash.h pkghash.c \
remove.h remove.c \
+ signing.c signing.h \
sync.h sync.c \
trans.h trans.c \
util.h util.c \
diff --git a/lib/libalpm/alpm.h b/lib/libalpm/alpm.h
index 1c8d232e..150730ce 100644
--- a/lib/libalpm/alpm.h
+++ b/lib/libalpm/alpm.h
@@ -246,6 +246,12 @@ off_t alpm_pkg_download_size(pmpkg_t *newpkg);
alpm_list_t *alpm_pkg_unused_deltas(pmpkg_t *pkg);
/*
+ * Signatures
+ */
+
+int alpm_pkg_check_pgp_signature(pmpkg_t *pkg);
+
+/*
* Deltas
*/
@@ -527,6 +533,7 @@ enum _pmerrno_t {
PM_ERR_PKG_INVALID_ARCH,
PM_ERR_PKG_REPO_NOT_FOUND,
/* Signatures */
+ PM_ERR_SIG_MISSINGDIR,
PM_ERR_SIG_INVALID,
PM_ERR_SIG_UNKNOWN,
/* Deltas */
@@ -543,7 +550,8 @@ enum _pmerrno_t {
/* External library errors */
PM_ERR_LIBARCHIVE,
PM_ERR_LIBCURL,
- PM_ERR_EXTERNAL_DOWNLOAD
+ PM_ERR_EXTERNAL_DOWNLOAD,
+ PM_ERR_GPGME
};
extern enum _pmerrno_t pm_errno;
diff --git a/lib/libalpm/error.c b/lib/libalpm/error.c
index 71c058f6..4d4a065c 100644
--- a/lib/libalpm/error.c
+++ b/lib/libalpm/error.c
@@ -116,6 +116,8 @@ const char SYMEXPORT *alpm_strerror(int err)
case PM_ERR_PKG_REPO_NOT_FOUND:
return _("could not find repository for target");
/* Signatures */
+ case PM_ERR_SIG_MISSINGDIR:
+ return _("signature directory not configured correctly");
case PM_ERR_SIG_INVALID:
return _("invalid PGP signature");
case PM_ERR_SIG_UNKNOWN:
@@ -152,6 +154,8 @@ const char SYMEXPORT *alpm_strerror(int err)
/* obviously shouldn't get here... */
return _("download library error");
#endif
+ case PM_ERR_GPGME:
+ return _("gpgme error");
case PM_ERR_EXTERNAL_DOWNLOAD:
return _("error invoking external downloader");
/* Unknown error! */
diff --git a/lib/libalpm/signing.c b/lib/libalpm/signing.c
new file mode 100644
index 00000000..27855798
--- /dev/null
+++ b/lib/libalpm/signing.c
@@ -0,0 +1,219 @@
+/*
+ * signing.c
+ *
+ * Copyright (c) 2008-2011 Pacman Development Team <pacman-dev@archlinux.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <locale.h> /* setlocale() */
+#include <gpgme.h>
+
+/* libalpm */
+#include "signing.h"
+#include "package.h"
+#include "util.h"
+#include "log.h"
+#include "alpm.h"
+
+#define CHECK_ERR(void) do { \
+ if(err != GPG_ERR_NO_ERROR) { goto error; } \
+ } while(0)
+
+static int gpgme_init(void)
+{
+ static int init = 0;
+ const char *version;
+ gpgme_error_t err;
+ gpgme_engine_info_t enginfo;
+
+ ALPM_LOG_FUNC;
+
+ if(init) {
+ /* we already successfully initialized the library */
+ return 0;
+ }
+
+ if(!alpm_option_get_signaturedir()) {
+ RET_ERR(PM_ERR_SIG_MISSINGDIR, 1);
+ }
+
+ /* calling gpgme_check_version() returns the current version and runs
+ * some internal library setup code */
+ version = gpgme_check_version(NULL);
+ _alpm_log(PM_LOG_DEBUG, "GPGME version: %s\n", version);
+ gpgme_set_locale(NULL, LC_CTYPE, setlocale(LC_CTYPE, NULL));
+#ifdef LC_MESSAGES
+ gpgme_set_locale(NULL, LC_MESSAGES, setlocale(LC_MESSAGES, NULL));
+#endif
+ /* NOTE:
+ * The GPGME library installs a SIGPIPE signal handler automatically if
+ * the default signal hander is in use. The only time we set a handler
+ * for SIGPIPE is in dload.c, and we reset it when we are done. Given that
+ * we do this, we can let GPGME do its automagic. However, if we install
+ * a library-wide SIGPIPE handler, we will have to be careful.
+ */
+
+ /* check for OpenPGP support (should be a no-brainer, but be safe) */
+ err = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
+ CHECK_ERR();
+
+ /* set and check engine information */
+ err = gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP, NULL,
+ alpm_option_get_signaturedir());
+ CHECK_ERR();
+ err = gpgme_get_engine_info(&enginfo);
+ CHECK_ERR();
+ _alpm_log(PM_LOG_DEBUG, "GPGME engine info: file=%s, home=%s\n",
+ enginfo->file_name, enginfo->home_dir);
+
+ init = 1;
+ return 0;
+
+error:
+ _alpm_log(PM_LOG_ERROR, _("GPGME error: %s\n"), gpgme_strerror(err));
+ RET_ERR(PM_ERR_GPGME, 1);
+}
+
+/**
+ * Check the PGP package signature for the given package file.
+ * @param pkgpath the full path to a package file
+ * @param sig PGP signature data in raw form (already decoded)
+ * @return a int value : 0 (valid), 1 (invalid), -1 (an error occured)
+ */
+int _alpm_gpgme_checksig(const char *pkgpath, const pmpgpsig_t *sig)
+{
+ int ret = 0;
+ gpgme_error_t err;
+ gpgme_ctx_t ctx;
+ gpgme_data_t pkgdata, sigdata;
+ gpgme_verify_result_t result;
+ gpgme_signature_t gpgsig;
+ FILE *pkgfile = NULL, *sigfile = NULL;
+
+ ALPM_LOG_FUNC;
+
+ if(!sig || !sig->rawdata) {
+ RET_ERR(PM_ERR_SIG_UNKNOWN, -1);
+ }
+ if(!pkgpath || access(pkgpath, R_OK) != 0) {
+ RET_ERR(PM_ERR_PKG_NOT_FOUND, -1);
+ }
+ if(gpgme_init()) {
+ /* pm_errno was set in gpgme_init() */
+ return -1;
+ }
+
+ _alpm_log(PM_LOG_DEBUG, "checking package signature for %s\n", pkgpath);
+
+ memset(&ctx, 0, sizeof(ctx));
+ memset(&sigdata, 0, sizeof(sigdata));
+ memset(&pkgdata, 0, sizeof(pkgdata));
+
+ err = gpgme_new(&ctx);
+ CHECK_ERR();
+
+ /* create our necessary data objects to verify the signature */
+ /* first the package itself */
+ pkgfile = fopen(pkgpath, "rb");
+ if(pkgfile == NULL) {
+ pm_errno = PM_ERR_PKG_OPEN;
+ ret = -1;
+ goto error;
+ }
+ err = gpgme_data_new_from_stream(&pkgdata, pkgfile);
+ CHECK_ERR();
+
+ /* next create data object for the signature */
+ err = gpgme_data_new_from_mem(&sigdata, (char*)sig->rawdata, sig->rawlen, 0);
+ CHECK_ERR();
+
+ /* here's where the magic happens */
+ err = gpgme_op_verify(ctx, sigdata, pkgdata, NULL);
+ CHECK_ERR();
+ result = gpgme_op_verify_result(ctx);
+ gpgsig = result->signatures;
+ if (!gpgsig || gpgsig->next) {
+ _alpm_log(PM_LOG_ERROR, _("Unexpected number of signatures\n"));
+ ret = -1;
+ goto error;
+ }
+ fprintf(stdout, "\nsummary=%x\n", gpgsig->summary);
+ fprintf(stdout, "fpr=%s\n", gpgsig->fpr);
+ fprintf(stdout, "status=%d\n", gpgsig->status);
+ fprintf(stdout, "timestamp=%lu\n", gpgsig->timestamp);
+ fprintf(stdout, "wrong_key_usage=%u\n", gpgsig->wrong_key_usage);
+ fprintf(stdout, "pka_trust=%u\n", gpgsig->pka_trust);
+ fprintf(stdout, "chain_model=%u\n", gpgsig->chain_model);
+ fprintf(stdout, "validity=%d\n", gpgsig->validity);
+ fprintf(stdout, "validity_reason=%d\n", gpgsig->validity_reason);
+ fprintf(stdout, "key=%d\n", gpgsig->pubkey_algo);
+ fprintf(stdout, "hash=%d\n", gpgsig->hash_algo);
+
+ if(gpgsig->summary & GPGME_SIGSUM_VALID) {
+ /* good signature, continue */
+ } else if(gpgsig->summary & GPGME_SIGSUM_GREEN) {
+ /* 'green' signature, not sure what to do here */
+ _alpm_log(PM_LOG_WARNING, _("Package %s has a green signature.\n"),
+ pkgpath);
+ } else if(gpgsig->summary & GPGME_SIGSUM_KEY_MISSING) {
+ pm_errno = PM_ERR_SIG_UNKNOWN;
+ _alpm_log(PM_LOG_WARNING, _("Package %s has a signature from an unknown key.\n"),
+ pkgpath);
+ ret = -1;
+ } else {
+ /* we'll capture everything else here */
+ pm_errno = PM_ERR_SIG_INVALID;
+ _alpm_log(PM_LOG_ERROR, _("Package %s has an invalid signature.\n"),
+ pkgpath);
+ ret = 1;
+ }
+
+error:
+ gpgme_data_release(sigdata);
+ gpgme_data_release(pkgdata);
+ gpgme_release(ctx);
+ if(sigfile) {
+ fclose(sigfile);
+ }
+ if(pkgfile) {
+ fclose(pkgfile);
+ }
+ if(err != GPG_ERR_NO_ERROR) {
+ _alpm_log(PM_LOG_ERROR, _("GPGME error: %s\n"), gpgme_strerror(err));
+ RET_ERR(PM_ERR_GPGME, -1);
+ }
+ return ret;
+}
+
+/**
+ * Check the PGP package signature for the given package file.
+ * @param pkg the package to check
+ * @return a int value : 0 (valid), 1 (invalid), -1 (an error occured)
+ */
+int SYMEXPORT alpm_pkg_check_pgp_signature(pmpkg_t *pkg)
+{
+ ALPM_LOG_FUNC;
+ ASSERT(pkg != NULL, return 0);
+
+ return _alpm_gpgme_checksig(alpm_pkg_get_filename(pkg),
+ alpm_pkg_get_pgpsig(pkg));
+}
+
+/* vim: set ts=2 sw=2 noet: */
diff --git a/lib/libalpm/signing.h b/lib/libalpm/signing.h
new file mode 100644
index 00000000..bd12de42
--- /dev/null
+++ b/lib/libalpm/signing.h
@@ -0,0 +1,28 @@
+/*
+ * signing.h
+ *
+ * Copyright (c) 2008-2011 Pacman Development Team <pacman-dev@archlinux.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _ALPM_SIGNING_H
+#define _ALPM_SIGNING_H
+
+#include "alpm.h"
+
+int _alpm_gpgme_checksig(const char *pkgpath, const pmpgpsig_t *sig);
+
+#endif /* _ALPM_SIGNING_H */
+
+/* vim: set ts=2 sw=2 noet: */
diff --git a/lib/libalpm/sync.c b/lib/libalpm/sync.c
index e0a86706..5e7cf293 100644
--- a/lib/libalpm/sync.c
+++ b/lib/libalpm/sync.c
@@ -50,6 +50,7 @@
#include "delta.h"
#include "remove.h"
#include "diskspace.h"
+#include "signing.h"
/** Check for new version of pkg in sync repos
* (only the first occurrence is considered in sync)
@@ -665,32 +666,24 @@ static int apply_deltas(pmtrans_t *trans)
* should be deleted.
*
* @param trans the transaction
- * @param filename the filename of the file to test
+ * @param filename the absolute path of the file to test
* @param md5sum the expected md5sum of the file
*
* @return 0 if the md5sum matched, 1 if not, -1 in case of errors
*/
-static int test_md5sum(pmtrans_t *trans, const char *filename,
+static int test_md5sum(pmtrans_t *trans, const char *filepath,
const char *md5sum)
{
- char *filepath;
- int ret;
-
- filepath = _alpm_filecache_find(filename);
-
- ret = _alpm_test_md5sum(filepath, md5sum);
-
+ int ret = _alpm_test_md5sum(filepath, md5sum);
if(ret == 1) {
int doremove = 0;
- QUESTION(trans, PM_TRANS_CONV_CORRUPTED_PKG, (char *)filename,
+ QUESTION(trans, PM_TRANS_CONV_CORRUPTED_PKG, (char*)filepath,
NULL, NULL, &doremove);
if(doremove) {
unlink(filepath);
}
}
- FREE(filepath);
-
return ret;
}
@@ -800,12 +793,14 @@ int _alpm_sync_commit(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t **data)
for(i = deltas; i; i = i->next) {
pmdelta_t *d = alpm_list_getdata(i);
const char *filename = alpm_delta_get_filename(d);
+ char *filepath = _alpm_filecache_find(filename);
const char *md5sum = alpm_delta_get_md5sum(d);
- if(test_md5sum(trans, filename, md5sum) != 0) {
+ if(test_md5sum(trans, filepath, md5sum) != 0) {
errors++;
*data = alpm_list_add(*data, strdup(filename));
}
+ FREE(filepath);
}
if(errors) {
pm_errno = PM_ERR_DLT_INVALID;
@@ -829,6 +824,7 @@ int _alpm_sync_commit(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t **data)
EVENT(trans, PM_TRANS_EVT_INTEGRITY_START, NULL, NULL);
errors = 0;
+
for(i = trans->add; i; i = i->next, current++) {
pmpkg_t *spkg = i->data;
int percent = (current * 100) / numtargs;
@@ -839,17 +835,27 @@ int _alpm_sync_commit(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t **data)
numtargs, current);
const char *filename = alpm_pkg_get_filename(spkg);
+ char *filepath = _alpm_filecache_find(filename);
const char *md5sum = alpm_pkg_get_md5sum(spkg);
+ const pmpgpsig_t *pgpsig = alpm_pkg_get_pgpsig(spkg);
- if(test_md5sum(trans, filename, md5sum) != 0) {
+ /* check md5sum first */
+ if(test_md5sum(trans, filepath, md5sum) != 0) {
errors++;
*data = alpm_list_add(*data, strdup(filename));
+ FREE(filepath);
+ continue;
+ }
+ /* check PGP signature next */
+ if(_alpm_gpgme_checksig(filepath, pgpsig) != 0) {
+ errors++;
+ *data = alpm_list_add(*data, strdup(filename));
+ FREE(filepath);
continue;
}
/* load the package file and replace pkgcache entry with it in the target list */
/* TODO: alpm_pkg_get_db() will not work on this target anymore */
_alpm_log(PM_LOG_DEBUG, "replacing pkgcache entry with package file for target %s\n", spkg->name);
- char *filepath = _alpm_filecache_find(filename);
pmpkg_t *pkgfile;
if(alpm_pkg_load(filepath, 1, &pkgfile) != 0) {
_alpm_pkg_free(pkgfile);
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-11-27 21:54:50 +0000