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New utility: xbps-rkeys(8) to manage RSA public keys.

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This commit is contained in:
Juan RP 2013-10-09 10:13:07 +02:00
parent 250916fa6a
commit a5ecaa493f
14 changed files with 406 additions and 37 deletions
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1
.gitignore vendored
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@ -13,6 +13,7 @@ bin/xbps-reconfigure/xbps-reconfigure
bin/xbps-remove/xbps-remove
bin/xbps-rindex/xbps-rindex
bin/xbps-uhelper/xbps-uhelper
bin/xbps-rkeys/xbps-rkeys
*.static
*.so*
*.o

9
NEWS
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@ -3,14 +3,17 @@ xbps-0.27 (???):
* xbps-rindex(8): -c --clean mode has been removed. Generating a local repository
is almost as fast as cleaning up the repository data.
* xbps-rkeys(8): new utility to manage RSA public keys from remote signed repositories.
* Support for RSA signed repositories. A repository can be signed with your
preferred RSA key (any ssh key works) as follows:
$ xbps-rindex -s --signedby "foobar <foo@bar>" --privkey /priv/key /path/to/repo
The first time xbps-install(8) access to a signed repository it will ask you
to import its public key to verify the signature. Please double-check the
hex fingerprint of the public key is the real one!
Public keys must be imported before using a remote signed repository thru
the xbps-rkeys(8) utility:
$ xbps-rkeys -i <repourl>
Once the public key has been imported it's not expected to change, hence if the
repository index has been modified or signed with another key, it will be ignored.

1
bin/Makefile
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@ -9,5 +9,6 @@ SUBDIRS += xbps-reconfigure
SUBDIRS += xbps-remove
SUBDIRS += xbps-rindex
SUBDIRS += xbps-uhelper
SUBDIRS += xbps-rkeys
include ../mk/subdir.mk

7
bin/xbps-install/state_cb.c
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@ -47,13 +47,6 @@ state_cb(struct xbps_state_cb_data *xscd, void *cbdata _unused)
switch (xscd->state) {
/* notifications */
case XBPS_STATE_REPO_KEY_IMPORT:
printf("%s\n", xscd->desc);
printf("Fingerprint: ");
xbps_print_hexfp(xscd->arg);
printf("\n");
rv = noyes("Do you want to import this public key?");
break;
case XBPS_STATE_REPO_SIGVERIFIED:
printf("[*] RSA signature verified correctly\n");
break;

7
bin/xbps-rkeys/Makefile Normal file
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@ -0,0 +1,7 @@
TOPDIR = ../..
-include $(TOPDIR)/config.mk
BIN = xbps-rkeys
OBJS = main.o ../xbps-install/question.o ../xbps-install/fetch_cb.o
include $(TOPDIR)/mk/prog.mk

44
bin/xbps-rkeys/defs.h Normal file
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@ -0,0 +1,44 @@
/*-
* Copyright (c) 2013 Juan Romero Pardines.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _XBPS_RKEYS_DEFS_H_
#define _XBPS_RKEYS_DEFS_H_
#include <sys/time.h>
#include <xbps.h>
struct xferstat {
struct timeval start;
struct timeval last;
};
/* from xbps-install/fetch_cb.c */
void fetch_file_progress_cb(struct xbps_fetch_cb_data *, void *);
/* from xbps-install/question.c */
bool yesno(const char *, ...);
bool noyes(const char *, ...);
#endif /* !_XBPS_RKEYS_DEFS_H_ */

239
bin/xbps-rkeys/main.c Normal file
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@ -0,0 +1,239 @@
/*-
* Copyright (c) 2013 Juan Romero Pardines.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <getopt.h>
#include <assert.h>
#include <xbps.h>
#include "defs.h"
static void __attribute__((noreturn))
usage(bool fail)
{
fprintf(stdout,
"Usage: xbps-rkeys [OPTIONS] <MODE> [REPOURL...]\n\n"
"OPTIONS\n"
" -a --all Process all repositories in configuration file\n"
" -C --config <file> Full path to configuration file\n"
" -d --debug Debug mode shown to stderr\n"
" -h --help Print usage help\n"
" -r --rootdir <dir> Full path to rootdir\n"
" -V --version Show XBPS version\n\n"
"MODE\n"
" -i --import Import public RSA key(s)\n"
" -R --remove Remove public RSA key(s)\n"
" -s --show Show repository info\n");
exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
}
static int
state_cb(struct xbps_state_cb_data *xscd, void *cbd _unused)
{
int rv = 0;
switch (xscd->state) {
/* notifications */
case XBPS_STATE_REPO_KEY_IMPORT:
printf("%s\n", xscd->desc);
printf("Fingerprint: ");
xbps_print_hexfp(xscd->arg);
printf("\n");
rv = noyes("Do you want to import this public key?");
break;
case XBPS_STATE_REPOSYNC:
printf("[*] Downloading repository index `%s'...\n", xscd->arg);
break;
default:
xbps_dbg_printf(xscd->xhp,
"%s: unknown state %d\n", xscd->arg, xscd->state);
break;
}
return rv;
}
static int
repo_import_key_cb(struct xbps_repo *repo, void *arg _unused, bool *done _unused)
{
return xbps_repo_key_import(repo);
}
static int
repo_info_cb(struct xbps_repo *repo, void *arg _unused, bool *done _unused)
{
xbps_dictionary_t rkeyd = NULL;
xbps_data_t rpubkey;
unsigned char *fp;
const char *signee;
uint16_t rpubkeysiz;
if (!repo->is_remote)
return 0;
printf("%s (%s, %s)\n", repo->uri,
repo->is_signed ? "RSA signed" : "unsigned",
repo->is_verified ? "verified" : "unverified");
rkeyd = xbps_dictionary_get(repo->xhp->repokeys, repo->uri);
if (xbps_object_type(rkeyd) == XBPS_TYPE_DICTIONARY) {
rpubkey = xbps_dictionary_get(rkeyd, "public-key");
assert(rpubkey);
xbps_dictionary_get_uint16(rkeyd, "public-key-size", &rpubkeysiz);
xbps_dictionary_get_cstring_nocopy(rkeyd, "signature-by", &signee);
printf(" Signed by: %s\n", signee);
printf(" %u ", rpubkeysiz);
fp = xbps_pubkey2fp(repo->xhp, rpubkey);
assert(fp);
xbps_print_hexfp((const char *)fp);
free(fp);
printf("\n");
}
return 0;
}
static int
repo_remove_key_cb(struct xbps_repo *repo, void *arg, bool *done _unused)
{
bool *flush = arg;
if (xbps_object_type(repo->xhp->repokeys) != XBPS_TYPE_DICTIONARY)
return 0;
xbps_dictionary_remove(repo->xhp->repokeys, repo->uri);
printf("Removed `%s' from storage.\n", repo->uri);
*flush = true;
return 0;
}
int
main(int argc, char **argv)
{
const char *shortopts = "aC:dhir:Rsv";
const struct option longopts[] = {
{ "all", no_argument, NULL, 'a' },
{ "config", required_argument, NULL, 'C' },
{ "debug", no_argument, NULL, 'd' },
{ "help", no_argument, NULL, 'h' },
{ "import", no_argument, NULL, 'i' },
{ "remove", no_argument, NULL, 'R' },
{ "show", no_argument, NULL, 's' },
{ "rootdir", required_argument, NULL, 'r' },
{ "version", no_argument, NULL, 'V' },
{ NULL, 0, NULL, 0 }
};
struct xbps_handle xh;
struct xferstat xfer;
char *rkeys;
const char *conffile = NULL, *rootdir = NULL;
int c, rv, flags = 0;
bool all, flush, import, remove, show;
all = import = remove = show = flush = false;
while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
switch (c) {
case 'a':
all = true;
break;
case 'C':
conffile = optarg;
break;
case 'd':
flags |= XBPS_FLAG_DEBUG;
break;
case 'h':
usage(false);
/* NOTREACHED */
case 'i':
import = true;
break;
case 'R':
remove = true;
break;
case 'r':
rootdir = optarg;
break;
case 's':
show = true;
break;
case 'V':
printf("%s\n", XBPS_RELVER);
exit(EXIT_SUCCESS);
case '?':
default:
usage(true);
/* NOTREACHED */
}
}
if (!all && (argc == optind))
usage(true);
memset(&xh, 0, sizeof(xh));
xh.fetch_cb = fetch_file_progress_cb;
xh.fetch_cb_data = &xfer;
xh.state_cb = state_cb;
xh.rootdir = rootdir;
xh.conffile = conffile;
xh.flags = flags;
/* register specified repos */
if (!all) {
for (int i = optind; i < argc; i++) {
if (xh.repositories == NULL)
xh.repositories = xbps_array_create();
xbps_array_add_cstring_nocopy(xh.repositories, argv[i]);
}
}
/* initialize libxbps */
if ((rv = xbps_init(&xh)) != 0) {
xbps_error_printf("Failed to initialize libxbps: %s\n",
strerror(rv));
exit(EXIT_FAILURE);
}
if (import) {
/* Sync remote repodata first */
xbps_rpool_sync(&xh, NULL);
rv = xbps_rpool_foreach(&xh, repo_import_key_cb, NULL);
} else if (remove) {
rv = xbps_rpool_foreach(&xh, repo_remove_key_cb, &flush);
if (flush) {
rkeys = xbps_xasprintf("%s/%s", xh.metadir, XBPS_REPOKEYS);
xbps_dictionary_externalize_to_file(xh.repokeys, rkeys);
free(rkeys);
}
} else if (show) {
rv = xbps_rpool_foreach(&xh, repo_info_cb, NULL);
}
xbps_end(&xh);
exit(rv ? EXIT_FAILURE : EXIT_SUCCESS);
}

61
bin/xbps-rkeys/xbps-rkeys.8 Normal file
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@ -0,0 +1,61 @@
.Dd October 9, 2013
.Os Void Linux
.Dt xbps-rkeys 8
.Sh NAME
.Nm xbps-rkeys
.Nd XBPS utility to manage RSA public keys in remote repositories
.Sh SYNOPSYS
.Nm xbps-rkeys
.Op OPTIONS
.Op MODE
.Op REPOURL...
.Sh DESCRIPTION
The
.Nm
utility manages RSA public keys from remote repositories. A public key from a remote
repository can be imported and removed, last but not least there is an option to
show the repository information with details.
.Sh OPTIONS
.Bl -tag -width -x
.It Fl a, Fl -all
Processes all repositories specified in a configuration file.
.It Fl C, Fl -config Ar file
Specifies a full path to the XBPS configuration file.
.It Fl d, Fl -debug
Enables extra debugging shown to stderr.
.It Fl h, Fl -help
Show the help usage.
.It Fl r, Fl -rootdir Ar dir
Specifies a full path for the target root directory.
.It Fl V, Fl -version
Shows the XBPS version.
.Sh MODE
.Bl -tag -width -x
.It Fl i, Fl -import
Imports the RSA public key of target repository into the database.
Please double-check the fingerprint is the real one.
.It Fl R, Fl -remove
Removes the RSA public key (and its properties) of target repository from
the database.
.It Fl s, Fl -show
Shows information of the target signed repositories.
.Sh FILES
.Bl -tag -width /var/db/xbps/repokeys.plist
.It Ar /var/db/xbps/repokeys.plist
Default plist file to store repository public keys and its properties.
.Sh SEE ALSO
.Xr xbps-create 8 ,
.Xr xbps-dgraph 8 ,
.Xr xbps-install 8 ,
.Xr xbps-pkgdb 8 ,
.Xr xbps-query 8 ,
.Xr xbps-reconfigure 8 ,
.Xr xbps-remove 8 ,
.Xr xbps-rindex 8
.Sh AUTHORS
.An Juan Romero Pardines <xtraeme@gmail.com>
.Sh BUGS
Probably, but I try to make this not happen. Use it under your own
responsability and enjoy your life.
.Pp
Report bugs in https://github.com/xtraeme/xbps/issues

13
include/xbps.h.in
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@ -46,7 +46,7 @@
*
* This header documents the full API for the XBPS Library.
*/
#define XBPS_API_VERSION "20131007"
#define XBPS_API_VERSION "20131009"
#ifndef XBPS_VERSION
#define XBPS_VERSION "UNSET"
@ -1281,6 +1281,7 @@ struct xbps_repo *xbps_repo_open(struct xbps_handle *xhp, const char *url);
*/
void xbps_repo_close(struct xbps_repo *repo);
/**
* Prepares the repository index-files.plist to have access to it.
* The repository must be opened previously with \a xbps_repo_open().
@ -1350,6 +1351,16 @@ xbps_dictionary_t xbps_repo_get_pkg_plist(struct xbps_handle *xhp,
*/
xbps_array_t xbps_repo_get_pkg_revdeps(struct xbps_repo *repo, const char *pkg);
/**
* Imports the RSA public key of target repository. The repository must be
* signed properly for this to work.
*
* @param[in] repo Pointer to the target xbps_repo structure.
*
* @return 0 on success, an errno value otherwise.
*/
int xbps_repo_key_import(struct xbps_repo *repo);
/*@}*/
/** @addtogroup archive_util */

7
include/xbps_api_impl.h
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@ -156,11 +156,16 @@ int HIDDEN xbps_entry_install_conf_file(struct xbps_handle *,
const char *,
const char *);
/**
* @private
* From lib/repo.c
*/
void HIDDEN xbps_repo_invalidate(struct xbps_repo *);
/**
* @private
* From lib/repo_keys.c
*/
int HIDDEN xbps_repo_key_import(struct xbps_repo *);
int HIDDEN xbps_repo_key_verify(struct xbps_repo *);
/**

9
lib/initend.c
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@ -253,10 +253,13 @@ xbps_end(struct xbps_handle *xhp)
xbps_pkgdb_release(xhp);
xbps_rpool_release(xhp);
xbps_fetch_unset_cache_connection();
if (xhp->pkgdb_revdeps != NULL)
xbps_object_release(xhp->pkgdb_revdeps);
if (xbps_object_type(xhp->pkgdb_revdeps) != XBPS_TYPE_UNKNOWN)
xbps_object_release(xhp->pkgdb_revdeps);
if (xbps_object_type(xhp->repokeys) != XBPS_TYPE_UNKNOWN)
xbps_object_release(xhp->repokeys);
xbps_fetch_unset_cache_connection();
cfg_free(xhp->cfg);
free(xhp->cachedir_priv);
free(xhp->metadir_priv);

18
lib/repo.c
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@ -172,6 +172,24 @@ xbps_repo_open_idxfiles(struct xbps_repo *repo)
repo->idxfiles = repo_get_dict(repo, XBPS_REPOIDX_FILES);
}
void HIDDEN
xbps_repo_invalidate(struct xbps_repo *repo)
{
if (repo->ar != NULL) {
archive_read_finish(repo->ar);
repo->ar = NULL;
}
if (repo->idx != NULL) {
xbps_object_release(repo->idx);
repo->idx = NULL;
}
if (repo->idxfiles != NULL) {
xbps_object_release(repo->idxfiles);
repo->idxfiles = NULL;
}
repo->is_verified = false;
}
void
xbps_repo_close(struct xbps_repo *repo)
{

4
lib/repo_keys.c
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@ -36,7 +36,7 @@
#include "xbps_api_impl.h"
int HIDDEN
int
xbps_repo_key_import(struct xbps_repo *repo)
{
xbps_dictionary_t repokeyd, newmetad = NULL;
@ -58,8 +58,8 @@ xbps_repo_key_import(struct xbps_repo *repo)
/*
* Check if the public key has been stored for this repository.
*/
if (repo->xhp->repokeys == NULL) {
rkeypath = xbps_xasprintf("%s/%s", repo->xhp->metadir, XBPS_REPOKEYS);
if (repo->xhp->repokeys == NULL) {
repo->xhp->repokeys = xbps_dictionary_internalize_from_file(rkeypath);
if (xbps_object_type(repo->xhp->repokeys) != XBPS_TYPE_DICTIONARY)
repo->xhp->repokeys = xbps_dictionary_create();

23
lib/rpool.c
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@ -78,23 +78,9 @@ xbps_rpool_init(struct xbps_handle *xhp)
rp->repo->is_remote = true;
}
if (rp->repo->is_remote) {
/*
* Import the RSA public key (if it's signed).
*/
retval = xbps_repo_key_import(rp->repo);
if (retval == EAGAIN) {
/* signed but public key was not imported */
xbps_dbg_printf(xhp, "[rpool] `%s': public-key not yet imported.\n", repouri);
rp->repo->is_signed = true;
rp->repo->is_verified = false;
} else if (retval != 0 && retval != EAGAIN) {
/* any error */
xbps_dbg_printf(xhp, "[rpool] %s: key_import %s\n",
repouri, strerror(retval));
}
if (!rp->repo->is_signed) {
/* ignore unsigned repositories */
xbps_repo_close(rp->repo);
xbps_repo_invalidate(rp->repo);
} else {
/*
* Check the repository index signature against
@ -107,13 +93,12 @@ xbps_rpool_init(struct xbps_handle *xhp)
} else if (retval == EPERM) {
/* signed, unverified */
xbps_set_cb_state(xhp, XBPS_STATE_REPO_SIGUNVERIFIED, 0, NULL, NULL);
xbps_repo_close(rp->repo);
rp->repo->is_verified = false;
xbps_repo_invalidate(rp->repo);
} else {
/* any error */
xbps_dbg_printf(xhp, "[rpool] %s: key_verify %s\n",
repouri, strerror(retval));
xbps_repo_close(rp->repo);
xbps_repo_invalidate(rp->repo);
}
}
}
@ -155,8 +140,6 @@ xbps_rpool_release(struct xbps_handle *xhp)
free(rp->repo);
free(rp);
}
xbps_object_release(xhp->repokeys);
xhp->repokeys = NULL;
xhp->rpool_initialized = false;
xbps_dbg_printf(xhp, "[rpool] released ok.\n");
}