xbps/lib/repo.c
Juan RP 6c76f6786d xbps_repo_open: do not create repodata file in locked mode.
... we want a proper errno value (ENOENT) if the archive does not exist.
2014-11-06 11:38:55 +01:00

546 lines
13 KiB
C

/*-
* Copyright (c) 2012-2014 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 <errno.h>
#include <libgen.h>
#include <fcntl.h>
#include <openssl/err.h>
#include <openssl/sha.h>
#include <openssl/rsa.h>
#include <openssl/ssl.h>
#include <openssl/pem.h>
#include "xbps_api_impl.h"
/**
* @file lib/repo.c
* @brief Repository functions
* @defgroup repo Repository functions
*/
char *
xbps_repo_path(struct xbps_handle *xhp, const char *url)
{
assert(xhp);
assert(url);
return xbps_xasprintf("%s/%s-repodata",
url, xhp->target_arch ? xhp->target_arch : xhp->native_arch);
}
static xbps_dictionary_t
repo_get_dict(struct xbps_repo *repo)
{
xbps_dictionary_t d = NULL;
struct archive_entry *entry;
char *adata = NULL;
const void *buf;
off_t offset;
size_t size;
int rv;
if (repo->ar == NULL)
return NULL;
rv = archive_read_next_header(repo->ar, &entry);
if (rv != ARCHIVE_OK) {
xbps_dbg_printf(repo->xhp,
"%s: read_next_header %s\n", repo->uri,
archive_error_string(repo->ar));
return NULL;
}
for (;;) {
rv = archive_read_data_block(repo->ar, &buf, &size, &offset);
if (rv == ARCHIVE_EOF)
break;
if (rv != ARCHIVE_OK) {
if (adata != NULL)
free(adata);
xbps_dbg_printf(repo->xhp,
"%s: read_data_block %s\n", repo->uri,
archive_error_string(repo->ar));
return NULL;
}
if (adata == NULL) {
adata = malloc(size);
} else {
adata = realloc(adata, size+offset);
if (adata == NULL) {
free(adata);
return NULL;
}
}
memcpy(adata+offset, buf, size);
}
if (adata != NULL) {
d = xbps_dictionary_internalize(adata);
free(adata);
}
return d;
}
struct xbps_repo *
xbps_repo_open(struct xbps_handle *xhp, const char *url, bool lock)
{
struct xbps_repo *repo;
struct stat st;
const char *arch;
char *repofile;
assert(xhp);
assert(url);
if (xhp->target_arch)
arch = xhp->target_arch;
else
arch = xhp->native_arch;
repo = calloc(1, sizeof(struct xbps_repo));
assert(repo);
repo->xhp = xhp;
repo->uri = url;
if (xbps_repository_is_remote(url)) {
/* remote repository */
char *rpath;
if ((rpath = xbps_get_remote_repo_string(url)) == NULL) {
free(repo);
return NULL;
}
repofile = xbps_xasprintf("%s/%s/%s-repodata", xhp->metadir, rpath, arch);
free(rpath);
repo->is_remote = true;
} else {
/* local repository */
repofile = xbps_repo_path(xhp, url);
}
/*
* Open or create the repository archive.
*/
if (lock)
repo->fd = open(repofile, O_RDWR);
else
repo->fd = open(repofile, O_RDONLY);
if (repo->fd == -1) {
xbps_dbg_printf(xhp, "[repo] `%s' open repodata %s\n",
repofile, strerror(errno));
goto out;
}
/*
* Acquire a POSIX file lock on the archive; wait if the lock is
* already taken.
*/
if (lock && lockf(repo->fd, F_LOCK, 0) == -1) {
xbps_dbg_printf(xhp, "[repo] failed to lock %s: %s\n", repo->uri, strerror(errno));
goto out;
}
if (fstat(repo->fd, &st) == -1) {
xbps_dbg_printf(xhp, "[repo] `%s' fstat repodata %s\n",
repofile, strerror(errno));
goto out;
}
repo->ar = archive_read_new();
archive_read_support_compression_gzip(repo->ar);
archive_read_support_format_tar(repo->ar);
if (archive_read_open_fd(repo->ar, repo->fd, st.st_blksize) == ARCHIVE_FATAL) {
xbps_dbg_printf(xhp,
"[repo] `%s' failed to open repodata archive %s\n",
repofile, strerror(archive_errno(repo->ar)));
goto out;
}
if ((repo->idx = repo_get_dict(repo)) == NULL) {
xbps_dbg_printf(xhp,
"[repo] `%s' failed to internalize index on archive %s: %s\n",
url, repofile, strerror(archive_errno(repo->ar)));
goto out;
}
repo->idxmeta = repo_get_dict(repo);
if (repo->idxmeta != NULL)
repo->is_signed = true;
free(repofile);
return repo;
out:
if (repo->ar)
archive_read_free(repo->ar);
if (repo->fd != -1)
close(repo->fd);
free(repofile);
free(repo);
return NULL;
}
void
xbps_repo_open_idxfiles(struct xbps_repo *repo)
{
assert(repo);
repo->idxfiles = repo_get_dict(repo);
}
void
xbps_repo_close(struct xbps_repo *repo, bool lock)
{
assert(repo);
if (repo->ar != NULL)
archive_read_finish(repo->ar);
if (repo->idx != NULL) {
xbps_object_release(repo->idx);
repo->idx = NULL;
}
if (repo->idxmeta != NULL) {
xbps_object_release(repo->idxmeta);
repo->idxmeta = NULL;
}
if (repo->idxfiles != NULL) {
xbps_object_release(repo->idxfiles);
repo->idxfiles = NULL;
}
if (lock && lockf(repo->fd, F_ULOCK, 0) == -1)
xbps_dbg_printf(repo->xhp, "[repo] failed to unlock %s: %s\n", repo->uri, strerror(errno));
close(repo->fd);
free(repo);
}
xbps_dictionary_t
xbps_repo_get_virtualpkg(struct xbps_repo *repo, const char *pkg)
{
xbps_dictionary_t pkgd;
assert(repo);
assert(pkg);
if (repo->idx == NULL)
return NULL;
pkgd = xbps_find_virtualpkg_in_dict(repo->xhp, repo->idx, pkg);
if (pkgd) {
xbps_dictionary_set_cstring_nocopy(pkgd,
"repository", repo->uri);
return pkgd;
}
return NULL;
}
xbps_dictionary_t
xbps_repo_get_pkg(struct xbps_repo *repo, const char *pkg)
{
xbps_dictionary_t pkgd;
assert(repo);
assert(pkg);
if (repo->idx == NULL)
return NULL;
pkgd = xbps_find_pkg_in_dict(repo->idx, pkg);
if (pkgd) {
xbps_dictionary_set_cstring_nocopy(pkgd,
"repository", repo->uri);
return pkgd;
}
return NULL;
}
xbps_dictionary_t
xbps_repo_get_pkg_plist(struct xbps_handle *xhp, xbps_dictionary_t pkgd,
const char *plist)
{
xbps_dictionary_t bpkgd;
char *url;
url = xbps_repository_pkg_path(xhp, pkgd);
if (url == NULL)
return NULL;
bpkgd = xbps_get_pkg_plist_from_binpkg(url, plist);
free(url);
return bpkgd;
}
static xbps_array_t
revdeps_match(struct xbps_repo *repo, xbps_dictionary_t tpkgd, const char *str)
{
xbps_dictionary_t pkgd;
xbps_array_t revdeps = NULL, pkgdeps, provides;
xbps_object_iterator_t iter;
xbps_object_t obj;
const char *pkgver, *tpkgver, *arch, *vpkg;
char *buf;
iter = xbps_dictionary_iterator(repo->idx);
assert(iter);
while ((obj = xbps_object_iterator_next(iter))) {
pkgd = xbps_dictionary_get_keysym(repo->idx, obj);
if (xbps_dictionary_equals(pkgd, tpkgd))
continue;
pkgdeps = xbps_dictionary_get(pkgd, "run_depends");
if (!xbps_array_count(pkgdeps))
continue;
/*
* Try to match passed in string.
*/
if (str) {
if (!xbps_match_pkgdep_in_array(pkgdeps, str))
continue;
xbps_dictionary_get_cstring_nocopy(pkgd,
"architecture", &arch);
if (!xbps_pkg_arch_match(repo->xhp, arch, NULL))
continue;
xbps_dictionary_get_cstring_nocopy(pkgd,
"pkgver", &tpkgver);
/* match */
if (revdeps == NULL)
revdeps = xbps_array_create();
if (!xbps_match_string_in_array(revdeps, tpkgver))
xbps_array_add_cstring_nocopy(revdeps, tpkgver);
continue;
}
/*
* Try to match any virtual package.
*/
provides = xbps_dictionary_get(tpkgd, "provides");
for (unsigned int i = 0; i < xbps_array_count(provides); i++) {
xbps_array_get_cstring_nocopy(provides, i, &vpkg);
if (strchr(vpkg, '_') == NULL)
buf = xbps_xasprintf("%s_1", vpkg);
else
buf = strdup(vpkg);
if (!xbps_match_pkgdep_in_array(pkgdeps, buf)) {
free(buf);
continue;
}
free(buf);
xbps_dictionary_get_cstring_nocopy(pkgd,
"architecture", &arch);
if (!xbps_pkg_arch_match(repo->xhp, arch, NULL))
continue;
xbps_dictionary_get_cstring_nocopy(pkgd, "pkgver",
&tpkgver);
/* match */
if (revdeps == NULL)
revdeps = xbps_array_create();
if (!xbps_match_string_in_array(revdeps, tpkgver))
xbps_array_add_cstring_nocopy(revdeps, tpkgver);
}
/*
* Try to match by pkgver.
*/
xbps_dictionary_get_cstring_nocopy(tpkgd, "pkgver", &pkgver);
if (!xbps_match_pkgdep_in_array(pkgdeps, pkgver))
continue;
xbps_dictionary_get_cstring_nocopy(pkgd,
"architecture", &arch);
if (!xbps_pkg_arch_match(repo->xhp, arch, NULL))
continue;
xbps_dictionary_get_cstring_nocopy(pkgd, "pkgver", &tpkgver);
/* match */
if (revdeps == NULL)
revdeps = xbps_array_create();
if (!xbps_match_string_in_array(revdeps, tpkgver))
xbps_array_add_cstring_nocopy(revdeps, tpkgver);
}
xbps_object_iterator_release(iter);
return revdeps;
}
xbps_array_t
xbps_repo_get_pkg_revdeps(struct xbps_repo *repo, const char *pkg)
{
xbps_array_t revdeps = NULL, vdeps = NULL;
xbps_dictionary_t pkgd;
const char *vpkg;
char *buf = NULL;
bool match = false;
if (repo->idx == NULL)
return NULL;
if (((pkgd = xbps_rpool_get_pkg(repo->xhp, pkg)) == NULL) &&
((pkgd = xbps_rpool_get_virtualpkg(repo->xhp, pkg)) == NULL)) {
errno = ENOENT;
return NULL;
}
/*
* If pkg is a virtual pkg let's match it instead of the real pkgver.
*/
if ((vdeps = xbps_dictionary_get(pkgd, "provides"))) {
for (unsigned int i = 0; i < xbps_array_count(vdeps); i++) {
char *vpkgn;
xbps_array_get_cstring_nocopy(vdeps, i, &vpkg);
if (strchr(vpkg, '_') == NULL)
buf = xbps_xasprintf("%s_1", vpkg);
else
buf = strdup(vpkg);
vpkgn = xbps_pkg_name(buf);
assert(vpkgn);
if (strcmp(vpkgn, pkg) == 0) {
free(vpkgn);
break;
}
free(vpkgn);
free(buf);
buf = NULL;
}
if (buf) {
match = true;
revdeps = revdeps_match(repo, pkgd, buf);
free(buf);
}
}
if (!match)
revdeps = revdeps_match(repo, pkgd, NULL);
return revdeps;
}
int
xbps_repo_key_import(struct xbps_repo *repo)
{
xbps_dictionary_t repokeyd = NULL;
xbps_data_t pubkey = NULL;
uint16_t pubkey_size = 0;
const char *signedby = NULL;
char *hexfp = NULL;
char *p, *dbkeyd, *rkeyfile = NULL;
int import, rv = 0;
assert(repo);
/*
* If repository does not have required metadata plist, ignore it.
*/
if (!xbps_dictionary_count(repo->idxmeta)) {
xbps_dbg_printf(repo->xhp,
"[repo] `%s' unsigned repository!\n", repo->uri);
return 0;
}
/*
* Check for required objects in index-meta:
* - signature-by (string)
* - public-key (data)
* - public-key-size (number)
*/
xbps_dictionary_get_cstring_nocopy(repo->idxmeta, "signature-by", &signedby);
xbps_dictionary_get_uint16(repo->idxmeta, "public-key-size", &pubkey_size);
pubkey = xbps_dictionary_get(repo->idxmeta, "public-key");
if (signedby == NULL || pubkey_size == 0 ||
xbps_object_type(pubkey) != XBPS_TYPE_DATA) {
xbps_dbg_printf(repo->xhp,
"[repo] `%s': incomplete signed repository "
"(missing objs)\n", repo->uri);
rv = EINVAL;
goto out;
}
hexfp = xbps_pubkey2fp(repo->xhp, pubkey);
/*
* Check if the public key is alredy stored.
*/
rkeyfile = xbps_xasprintf("%s/keys/%s.plist", repo->xhp->metadir, hexfp);
repokeyd = xbps_dictionary_internalize_from_zfile(rkeyfile);
if (xbps_object_type(repokeyd) == XBPS_TYPE_DICTIONARY) {
xbps_dbg_printf(repo->xhp,
"[repo] `%s' public key already stored.\n", repo->uri);
goto out;
}
/*
* Notify the client and take appropiate action to import
* the repository public key. Pass back the public key openssh fingerprint
* to the client.
*/
import = xbps_set_cb_state(repo->xhp, XBPS_STATE_REPO_KEY_IMPORT, 0,
hexfp, "`%s' repository has been RSA signed by \"%s\"",
repo->uri, signedby);
if (import <= 0) {
rv = EAGAIN;
goto out;
}
p = strdup(rkeyfile);
dbkeyd = dirname(p);
assert(dbkeyd);
if (access(dbkeyd, R_OK|W_OK) == -1) {
rv = errno;
if (rv == ENOENT)
rv = xbps_mkpath(dbkeyd, 0755);
if (rv != 0) {
rv = errno;
xbps_dbg_printf(repo->xhp,
"[repo] `%s' cannot create %s: %s\n",
repo->uri, dbkeyd, strerror(errno));
free(p);
goto out;
}
}
free(p);
repokeyd = xbps_dictionary_create();
xbps_dictionary_set(repokeyd, "public-key", pubkey);
xbps_dictionary_set_uint16(repokeyd, "public-key-size", pubkey_size);
xbps_dictionary_set_cstring_nocopy(repokeyd, "signature-by", signedby);
if (!xbps_dictionary_externalize_to_file(repokeyd, rkeyfile)) {
rv = errno;
xbps_dbg_printf(repo->xhp,
"[repo] `%s' failed to externalize %s: %s\n",
repo->uri, rkeyfile, strerror(rv));
}
out:
if (hexfp)
free(hexfp);
if (repokeyd)
xbps_object_release(repokeyd);
if (rkeyfile)
free(rkeyfile);
return rv;
}