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freebsd-skq/usr.sbin/pkg/pkg.c
Kyle Evans b2c4ca8d28 pkg(7): address minor nits (mostly clang-analyze complaints) 
- One (1) spurious whitespace.
- One (1) occurrence of "random(3) bad, arc4random(3)" good.
- Three (3) writes that will never be seen.

The latter two points are complaints from clang-analyze. Switching to
arc4random(3) is decidedly a good idea because we weren't doing any kind
of PRNG seeding anyways. The discarded assignments are arguably good
for future-proofing, but it's better to improve the S/N ratio from
clang-analyze.

Reviewed by:	bapt, manu
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D28525
2021-02-11 18:58:27 -06:00

1215 lines
26 KiB
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2012-2014 Baptiste Daroussin <bapt@FreeBSD.org>
* Copyright (c) 2013 Bryan Drewery <bdrewery@FreeBSD.org>
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/sbuf.h>
#include <sys/wait.h>
#include <archive.h>
#include <archive_entry.h>
#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fetch.h>
#include <getopt.h>
#include <libutil.h>
#include <paths.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ucl.h>
#include <openssl/err.h>
#include <openssl/ssl.h>
#include "dns_utils.h"
#include "config.h"
struct sig_cert {
char *name;
unsigned char *sig;
int siglen;
unsigned char *cert;
int certlen;
bool trusted;
};
struct pubkey {
unsigned char *sig;
int siglen;
};
typedef enum {
HASH_UNKNOWN,
HASH_SHA256,
} hash_t;
struct fingerprint {
hash_t type;
char *name;
char hash[BUFSIZ];
STAILQ_ENTRY(fingerprint) next;
};
STAILQ_HEAD(fingerprint_list, fingerprint);
static int
extract_pkg_static(int fd, char *p, int sz)
{
struct archive *a;
struct archive_entry *ae;
char *end;
int ret, r;
ret = -1;
a = archive_read_new();
if (a == NULL) {
warn("archive_read_new");
return (ret);
}
archive_read_support_filter_all(a);
archive_read_support_format_tar(a);
if (lseek(fd, 0, 0) == -1) {
warn("lseek");
goto cleanup;
}
if (archive_read_open_fd(a, fd, 4096) != ARCHIVE_OK) {
warnx("archive_read_open_fd: %s", archive_error_string(a));
goto cleanup;
}
ae = NULL;
while ((r = archive_read_next_header(a, &ae)) == ARCHIVE_OK) {
end = strrchr(archive_entry_pathname(ae), '/');
if (end == NULL)
continue;
if (strcmp(end, "/pkg-static") == 0) {
r = archive_read_extract(a, ae,
ARCHIVE_EXTRACT_OWNER | ARCHIVE_EXTRACT_PERM |
ARCHIVE_EXTRACT_TIME | ARCHIVE_EXTRACT_ACL |
ARCHIVE_EXTRACT_FFLAGS | ARCHIVE_EXTRACT_XATTR);
strlcpy(p, archive_entry_pathname(ae), sz);
break;
}
}
if (r == ARCHIVE_OK)
ret = 0;
else
warnx("failed to extract pkg-static: %s",
archive_error_string(a));
cleanup:
archive_read_free(a);
return (ret);
}
static int
install_pkg_static(const char *path, const char *pkgpath, bool force)
{
int pstat;
pid_t pid;
switch ((pid = fork())) {
case -1:
return (-1);
case 0:
if (force)
execl(path, "pkg-static", "add", "-f", pkgpath,
(char *)NULL);
else
execl(path, "pkg-static", "add", pkgpath,
(char *)NULL);
_exit(1);
default:
break;
}
while (waitpid(pid, &pstat, 0) == -1)
if (errno != EINTR)
return (-1);
if (WEXITSTATUS(pstat))
return (WEXITSTATUS(pstat));
else if (WIFSIGNALED(pstat))
return (128 & (WTERMSIG(pstat)));
return (pstat);
}
static int
fetch_to_fd(const char *url, char *path, const char *fetchOpts)
{
struct url *u;
struct dns_srvinfo *mirrors, *current;
struct url_stat st;
FILE *remote;
/* To store _https._tcp. + hostname + \0 */
int fd;
int retry, max_retry;
ssize_t r;
char buf[10240];
char zone[MAXHOSTNAMELEN + 13];
static const char *mirror_type = NULL;
max_retry = 3;
current = mirrors = NULL;
remote = NULL;
if (mirror_type == NULL && config_string(MIRROR_TYPE, &mirror_type)
!= 0) {
warnx("No MIRROR_TYPE defined");
return (-1);
}
if ((fd = mkstemp(path)) == -1) {
warn("mkstemp()");
return (-1);
}
retry = max_retry;
if ((u = fetchParseURL(url)) == NULL) {
warn("fetchParseURL('%s')", url);
return (-1);
}
while (remote == NULL) {
if (retry == max_retry) {
if (strcmp(u->scheme, "file") != 0 &&
strcasecmp(mirror_type, "srv") == 0) {
snprintf(zone, sizeof(zone),
"_%s._tcp.%s", u->scheme, u->host);
mirrors = dns_getsrvinfo(zone);
current = mirrors;
}
}
if (mirrors != NULL) {
strlcpy(u->host, current->host, sizeof(u->host));
u->port = current->port;
}
remote = fetchXGet(u, &st, fetchOpts);
if (remote == NULL) {
--retry;
if (retry <= 0)
goto fetchfail;
if (mirrors == NULL) {
sleep(1);
} else {
current = current->next;
if (current == NULL)
current = mirrors;
}
}
}
while ((r = fread(buf, 1, sizeof(buf), remote)) > 0) {
if (write(fd, buf, r) != r) {
warn("write()");
goto fetchfail;
}
}
if (r != 0) {
warn("An error occurred while fetching pkg(8)");
goto fetchfail;
}
if (ferror(remote))
goto fetchfail;
goto cleanup;
fetchfail:
if (fd != -1) {
close(fd);
fd = -1;
unlink(path);
}
cleanup:
if (remote != NULL)
fclose(remote);
return fd;
}
static struct fingerprint *
parse_fingerprint(ucl_object_t *obj)
{
const ucl_object_t *cur;
ucl_object_iter_t it = NULL;
const char *function, *fp, *key;
struct fingerprint *f;
hash_t fct = HASH_UNKNOWN;
function = fp = NULL;
while ((cur = ucl_iterate_object(obj, &it, true))) {
key = ucl_object_key(cur);
if (cur->type != UCL_STRING)
continue;
if (strcasecmp(key, "function") == 0) {
function = ucl_object_tostring(cur);
continue;
}
if (strcasecmp(key, "fingerprint") == 0) {
fp = ucl_object_tostring(cur);
continue;
}
}
if (fp == NULL || function == NULL)
return (NULL);
if (strcasecmp(function, "sha256") == 0)
fct = HASH_SHA256;
if (fct == HASH_UNKNOWN) {
warnx("Unsupported hashing function: %s", function);
return (NULL);
}
f = calloc(1, sizeof(struct fingerprint));
f->type = fct;
strlcpy(f->hash, fp, sizeof(f->hash));
return (f);
}
static void
free_fingerprint_list(struct fingerprint_list* list)
{
struct fingerprint *fingerprint, *tmp;
STAILQ_FOREACH_SAFE(fingerprint, list, next, tmp) {
free(fingerprint->name);
free(fingerprint);
}
free(list);
}
static struct fingerprint *
load_fingerprint(const char *dir, const char *filename)
{
ucl_object_t *obj = NULL;
struct ucl_parser *p = NULL;
struct fingerprint *f;
char path[MAXPATHLEN];
f = NULL;
snprintf(path, MAXPATHLEN, "%s/%s", dir, filename);
p = ucl_parser_new(0);
if (!ucl_parser_add_file(p, path)) {
warnx("%s: %s", path, ucl_parser_get_error(p));
ucl_parser_free(p);
return (NULL);
}
obj = ucl_parser_get_object(p);
if (obj->type == UCL_OBJECT)
f = parse_fingerprint(obj);
if (f != NULL)
f->name = strdup(filename);
ucl_object_unref(obj);
ucl_parser_free(p);
return (f);
}
static struct fingerprint_list *
load_fingerprints(const char *path, int *count)
{
DIR *d;
struct dirent *ent;
struct fingerprint *finger;
struct fingerprint_list *fingerprints;
*count = 0;
fingerprints = calloc(1, sizeof(struct fingerprint_list));
if (fingerprints == NULL)
return (NULL);
STAILQ_INIT(fingerprints);
if ((d = opendir(path)) == NULL) {
free(fingerprints);
return (NULL);
}
while ((ent = readdir(d))) {
if (strcmp(ent->d_name, ".") == 0 ||
strcmp(ent->d_name, "..") == 0)
continue;
finger = load_fingerprint(path, ent->d_name);
if (finger != NULL) {
STAILQ_INSERT_TAIL(fingerprints, finger, next);
++(*count);
}
}
closedir(d);
return (fingerprints);
}
static void
sha256_hash(unsigned char hash[SHA256_DIGEST_LENGTH],
char out[SHA256_DIGEST_LENGTH * 2 + 1])
{
int i;
for (i = 0; i < SHA256_DIGEST_LENGTH; i++)
sprintf(out + (i * 2), "%02x", hash[i]);
out[SHA256_DIGEST_LENGTH * 2] = '\0';
}
static void
sha256_buf(char *buf, size_t len, char out[SHA256_DIGEST_LENGTH * 2 + 1])
{
unsigned char hash[SHA256_DIGEST_LENGTH];
SHA256_CTX sha256;
out[0] = '\0';
SHA256_Init(&sha256);
SHA256_Update(&sha256, buf, len);
SHA256_Final(hash, &sha256);
sha256_hash(hash, out);
}
static int
sha256_fd(int fd, char out[SHA256_DIGEST_LENGTH * 2 + 1])
{
int my_fd;
FILE *fp;
char buffer[BUFSIZ];
unsigned char hash[SHA256_DIGEST_LENGTH];
size_t r;
int ret;
SHA256_CTX sha256;
fp = NULL;
ret = 1;
out[0] = '\0';
/* Duplicate the fd so that fclose(3) does not close it. */
if ((my_fd = dup(fd)) == -1) {
warnx("dup");
goto cleanup;
}
if ((fp = fdopen(my_fd, "rb")) == NULL) {
warnx("fdopen");
goto cleanup;
}
SHA256_Init(&sha256);
while ((r = fread(buffer, 1, BUFSIZ, fp)) > 0)
SHA256_Update(&sha256, buffer, r);
if (ferror(fp) != 0) {
warnx("fread");
goto cleanup;
}
SHA256_Final(hash, &sha256);
sha256_hash(hash, out);
ret = 0;
cleanup:
if (fp != NULL)
fclose(fp);
else if (my_fd != -1)
close(my_fd);
(void)lseek(fd, 0, SEEK_SET);
return (ret);
}
static EVP_PKEY *
load_public_key_file(const char *file)
{
EVP_PKEY *pkey;
BIO *bp;
char errbuf[1024];
bp = BIO_new_file(file, "r");
if (!bp)
errx(EXIT_FAILURE, "Unable to read %s", file);
if ((pkey = PEM_read_bio_PUBKEY(bp, NULL, NULL, NULL)) == NULL)
warnx("ici: %s", ERR_error_string(ERR_get_error(), errbuf));
BIO_free(bp);
return (pkey);
}
static EVP_PKEY *
load_public_key_buf(const unsigned char *cert, int certlen)
{
EVP_PKEY *pkey;
BIO *bp;
char errbuf[1024];
bp = BIO_new_mem_buf(__DECONST(void *, cert), certlen);
if ((pkey = PEM_read_bio_PUBKEY(bp, NULL, NULL, NULL)) == NULL)
warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
BIO_free(bp);
return (pkey);
}
static bool
rsa_verify_cert(int fd, const char *sigfile, const unsigned char *key,
int keylen, unsigned char *sig, int siglen)
{
EVP_MD_CTX *mdctx;
EVP_PKEY *pkey;
char sha256[(SHA256_DIGEST_LENGTH * 2) + 2];
char errbuf[1024];
bool ret;
pkey = NULL;
mdctx = NULL;
ret = false;
SSL_load_error_strings();
/* Compute SHA256 of the package. */
if (lseek(fd, 0, 0) == -1) {
warn("lseek");
goto cleanup;
}
if ((sha256_fd(fd, sha256)) == -1) {
warnx("Error creating SHA256 hash for package");
goto cleanup;
}
if (sigfile != NULL) {
if ((pkey = load_public_key_file(sigfile)) == NULL) {
warnx("Error reading public key");
goto cleanup;
}
} else {
if ((pkey = load_public_key_buf(key, keylen)) == NULL) {
warnx("Error reading public key");
goto cleanup;
}
}
/* Verify signature of the SHA256(pkg) is valid. */
if ((mdctx = EVP_MD_CTX_create()) == NULL) {
warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
goto error;
}
if (EVP_DigestVerifyInit(mdctx, NULL, EVP_sha256(), NULL, pkey) != 1) {
warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
goto error;
}
if (EVP_DigestVerifyUpdate(mdctx, sha256, strlen(sha256)) != 1) {
warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
goto error;
}
if (EVP_DigestVerifyFinal(mdctx, sig, siglen) != 1) {
warnx("%s", ERR_error_string(ERR_get_error(), errbuf));
goto error;
}
ret = true;
printf("done\n");
goto cleanup;
error:
printf("failed\n");
cleanup:
if (pkey)
EVP_PKEY_free(pkey);
if (mdctx)
EVP_MD_CTX_destroy(mdctx);
ERR_free_strings();
return (ret);
}
static struct pubkey *
read_pubkey(int fd)
{
struct pubkey *pk;
struct sbuf *sig;
char buf[4096];
int r;
if (lseek(fd, 0, 0) == -1) {
warn("lseek");
return (NULL);
}
sig = sbuf_new_auto();
while ((r = read(fd, buf, sizeof(buf))) >0) {
sbuf_bcat(sig, buf, r);
}
sbuf_finish(sig);
pk = calloc(1, sizeof(struct pubkey));
pk->siglen = sbuf_len(sig);
pk->sig = calloc(1, pk->siglen);
memcpy(pk->sig, sbuf_data(sig), pk->siglen);
sbuf_delete(sig);
return (pk);
}
static struct sig_cert *
parse_cert(int fd) {
int my_fd;
struct sig_cert *sc;
FILE *fp;
struct sbuf *buf, *sig, *cert;
char *line;
size_t linecap;
ssize_t linelen;
buf = NULL;
sc = NULL;
line = NULL;
linecap = 0;
if (lseek(fd, 0, 0) == -1) {
warn("lseek");
return (NULL);
}
/* Duplicate the fd so that fclose(3) does not close it. */
if ((my_fd = dup(fd)) == -1) {
warnx("dup");
return (NULL);
}
if ((fp = fdopen(my_fd, "rb")) == NULL) {
warn("fdopen");
close(my_fd);
return (NULL);
}
sig = sbuf_new_auto();
cert = sbuf_new_auto();
while ((linelen = getline(&line, &linecap, fp)) > 0) {
if (strcmp(line, "SIGNATURE\n") == 0) {
buf = sig;
continue;
} else if (strcmp(line, "CERT\n") == 0) {
buf = cert;
continue;
} else if (strcmp(line, "END\n") == 0) {
break;
}
if (buf != NULL)
sbuf_bcat(buf, line, linelen);
}
fclose(fp);
/* Trim out unrelated trailing newline */
sbuf_setpos(sig, sbuf_len(sig) - 1);
sbuf_finish(sig);
sbuf_finish(cert);
sc = calloc(1, sizeof(struct sig_cert));
sc->siglen = sbuf_len(sig);
sc->sig = calloc(1, sc->siglen);
memcpy(sc->sig, sbuf_data(sig), sc->siglen);
sc->certlen = sbuf_len(cert);
sc->cert = strdup(sbuf_data(cert));
sbuf_delete(sig);
sbuf_delete(cert);
return (sc);
}
static bool
verify_pubsignature(int fd_pkg, int fd_sig)
{
struct pubkey *pk;
const char *pubkey;
bool ret;
pk = NULL;
pubkey = NULL;
ret = false;
if (config_string(PUBKEY, &pubkey) != 0) {
warnx("No CONFIG_PUBKEY defined");
goto cleanup;
}
if ((pk = read_pubkey(fd_sig)) == NULL) {
warnx("Error reading signature");
goto cleanup;
}
/* Verify the signature. */
printf("Verifying signature with public key %s... ", pubkey);
if (rsa_verify_cert(fd_pkg, pubkey, NULL, 0, pk->sig,
pk->siglen) == false) {
fprintf(stderr, "Signature is not valid\n");
goto cleanup;
}
ret = true;
cleanup:
if (pk) {
free(pk->sig);
free(pk);
}
return (ret);
}
static bool
verify_signature(int fd_pkg, int fd_sig)
{
struct fingerprint_list *trusted, *revoked;
struct fingerprint *fingerprint;
struct sig_cert *sc;
bool ret;
int trusted_count, revoked_count;
const char *fingerprints;
char path[MAXPATHLEN];
char hash[SHA256_DIGEST_LENGTH * 2 + 1];
sc = NULL;
trusted = revoked = NULL;
ret = false;
/* Read and parse fingerprints. */
if (config_string(FINGERPRINTS, &fingerprints) != 0) {
warnx("No CONFIG_FINGERPRINTS defined");
goto cleanup;
}
snprintf(path, MAXPATHLEN, "%s/trusted", fingerprints);
if ((trusted = load_fingerprints(path, &trusted_count)) == NULL) {
warnx("Error loading trusted certificates");
goto cleanup;
}
if (trusted_count == 0 || trusted == NULL) {
fprintf(stderr, "No trusted certificates found.\n");
goto cleanup;
}
snprintf(path, MAXPATHLEN, "%s/revoked", fingerprints);
if ((revoked = load_fingerprints(path, &revoked_count)) == NULL) {
warnx("Error loading revoked certificates");
goto cleanup;
}
/* Read certificate and signature in. */
if ((sc = parse_cert(fd_sig)) == NULL) {
warnx("Error parsing certificate");
goto cleanup;
}
/* Explicitly mark as non-trusted until proven otherwise. */
sc->trusted = false;
/* Parse signature and pubkey out of the certificate */
sha256_buf(sc->cert, sc->certlen, hash);
/* Check if this hash is revoked */
if (revoked != NULL) {
STAILQ_FOREACH(fingerprint, revoked, next) {
if (strcasecmp(fingerprint->hash, hash) == 0) {
fprintf(stderr, "The package was signed with "
"revoked certificate %s\n",
fingerprint->name);
goto cleanup;
}
}
}
STAILQ_FOREACH(fingerprint, trusted, next) {
if (strcasecmp(fingerprint->hash, hash) == 0) {
sc->trusted = true;
sc->name = strdup(fingerprint->name);
break;
}
}
if (sc->trusted == false) {
fprintf(stderr, "No trusted fingerprint found matching "
"package's certificate\n");
goto cleanup;
}
/* Verify the signature. */
printf("Verifying signature with trusted certificate %s... ", sc->name);
if (rsa_verify_cert(fd_pkg, NULL, sc->cert, sc->certlen, sc->sig,
sc->siglen) == false) {
fprintf(stderr, "Signature is not valid\n");
goto cleanup;
}
ret = true;
cleanup:
if (trusted)
free_fingerprint_list(trusted);
if (revoked)
free_fingerprint_list(revoked);
if (sc) {
free(sc->cert);
free(sc->sig);
free(sc->name);
free(sc);
}
return (ret);
}
static int
bootstrap_pkg(bool force, const char *fetchOpts)
{
int fd_pkg, fd_sig;
int ret;
char url[MAXPATHLEN];
char tmppkg[MAXPATHLEN];
char tmpsig[MAXPATHLEN];
const char *packagesite;
const char *signature_type;
char pkgstatic[MAXPATHLEN];
fd_sig = -1;
ret = -1;
if (config_string(PACKAGESITE, &packagesite) != 0) {
warnx("No PACKAGESITE defined");
return (-1);
}
if (config_string(SIGNATURE_TYPE, &signature_type) != 0) {
warnx("Error looking up SIGNATURE_TYPE");
return (-1);
}
printf("Bootstrapping pkg from %s, please wait...\n", packagesite);
/* Support pkg+http:// for PACKAGESITE which is the new format
in 1.2 to avoid confusion on why http://pkg.FreeBSD.org has
no A record. */
if (strncmp(URL_SCHEME_PREFIX, packagesite,
strlen(URL_SCHEME_PREFIX)) == 0)
packagesite += strlen(URL_SCHEME_PREFIX);
snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz", packagesite);
snprintf(tmppkg, MAXPATHLEN, "%s/pkg.txz.XXXXXX",
getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP);
if ((fd_pkg = fetch_to_fd(url, tmppkg, fetchOpts)) == -1)
goto fetchfail;
if (signature_type != NULL &&
strcasecmp(signature_type, "NONE") != 0) {
if (strcasecmp(signature_type, "FINGERPRINTS") == 0) {
snprintf(tmpsig, MAXPATHLEN, "%s/pkg.txz.sig.XXXXXX",
getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP);
snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz.sig",
packagesite);
if ((fd_sig = fetch_to_fd(url, tmpsig, fetchOpts)) == -1) {
fprintf(stderr, "Signature for pkg not "
"available.\n");
goto fetchfail;
}
if (verify_signature(fd_pkg, fd_sig) == false)
goto cleanup;
} else if (strcasecmp(signature_type, "PUBKEY") == 0) {
snprintf(tmpsig, MAXPATHLEN,
"%s/pkg.txz.pubkeysig.XXXXXX",
getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP);
snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz.pubkeysig",
packagesite);
if ((fd_sig = fetch_to_fd(url, tmpsig, fetchOpts)) == -1) {
fprintf(stderr, "Signature for pkg not "
"available.\n");
goto fetchfail;
}
if (verify_pubsignature(fd_pkg, fd_sig) == false)
goto cleanup;
} else {
warnx("Signature type %s is not supported for "
"bootstrapping.", signature_type);
goto cleanup;
}
}
if ((ret = extract_pkg_static(fd_pkg, pkgstatic, MAXPATHLEN)) == 0)
ret = install_pkg_static(pkgstatic, tmppkg, force);
goto cleanup;
fetchfail:
warnx("Error fetching %s: %s", url, fetchLastErrString);
if (fetchLastErrCode == FETCH_RESOLV) {
fprintf(stderr, "Address resolution failed for %s.\n", packagesite);
fprintf(stderr, "Consider changing PACKAGESITE.\n");
} else {
fprintf(stderr, "A pre-built version of pkg could not be found for "
"your system.\n");
fprintf(stderr, "Consider changing PACKAGESITE or installing it from "
"ports: 'ports-mgmt/pkg'.\n");
}
cleanup:
if (fd_sig != -1) {
close(fd_sig);
unlink(tmpsig);
}
if (fd_pkg != -1) {
close(fd_pkg);
unlink(tmppkg);
}
return (ret);
}
static const char confirmation_message[] =
"The package management tool is not yet installed on your system.\n"
"Do you want to fetch and install it now? [y/N]: ";
static const char non_interactive_message[] =
"The package management tool is not yet installed on your system.\n"
"Please set ASSUME_ALWAYS_YES=yes environment variable to be able to bootstrap "
"in non-interactive (stdin not being a tty)\n";
static const char args_bootstrap_message[] =
"Too many arguments\n"
"Usage: pkg [-4|-6] bootstrap [-f] [-y]\n";
static const char args_add_message[] =
"Too many arguments\n"
"Usage: pkg add [-f] [-y] {pkg.txz}\n";
static int
pkg_query_yes_no(void)
{
int ret, c;
fflush(stdout);
c = getchar();
if (c == 'y' || c == 'Y')
ret = 1;
else
ret = 0;
while (c != '\n' && c != EOF)
c = getchar();
return (ret);
}
static int
bootstrap_pkg_local(const char *pkgpath, bool force)
{
char path[MAXPATHLEN];
char pkgstatic[MAXPATHLEN];
const char *signature_type;
int fd_pkg, fd_sig, ret;
fd_sig = -1;
ret = -1;
fd_pkg = open(pkgpath, O_RDONLY);
if (fd_pkg == -1)
err(EXIT_FAILURE, "Unable to open %s", pkgpath);
if (config_string(SIGNATURE_TYPE, &signature_type) != 0) {
warnx("Error looking up SIGNATURE_TYPE");
goto cleanup;
}
if (signature_type != NULL &&
strcasecmp(signature_type, "NONE") != 0) {
if (strcasecmp(signature_type, "FINGERPRINTS") == 0) {
snprintf(path, sizeof(path), "%s.sig", pkgpath);
if ((fd_sig = open(path, O_RDONLY)) == -1) {
fprintf(stderr, "Signature for pkg not "
"available.\n");
goto cleanup;
}
if (verify_signature(fd_pkg, fd_sig) == false)
goto cleanup;
} else if (strcasecmp(signature_type, "PUBKEY") == 0) {
snprintf(path, sizeof(path), "%s.pubkeysig", pkgpath);
if ((fd_sig = open(path, O_RDONLY)) == -1) {
fprintf(stderr, "Signature for pkg not "
"available.\n");
goto cleanup;
}
if (verify_pubsignature(fd_pkg, fd_sig) == false)
goto cleanup;
} else {
warnx("Signature type %s is not supported for "
"bootstrapping.", signature_type);
goto cleanup;
}
}
if ((ret = extract_pkg_static(fd_pkg, pkgstatic, MAXPATHLEN)) == 0)
ret = install_pkg_static(pkgstatic, pkgpath, force);
cleanup:
close(fd_pkg);
if (fd_sig != -1)
close(fd_sig);
return (ret);
}
int
main(int argc, char *argv[])
{
char pkgpath[MAXPATHLEN];
const char *pkgarg, *repo_name;
bool activation_test, add_pkg, bootstrap_only, force, yes;
signed char ch;
const char *fetchOpts;
char *command;
activation_test = false;
add_pkg = false;
bootstrap_only = false;
command = NULL;
fetchOpts = "";
force = false;
pkgarg = NULL;
repo_name = NULL;
yes = false;
struct option longopts[] = {
{ "force", no_argument, NULL, 'f' },
{ "only-ipv4", no_argument, NULL, '4' },
{ "only-ipv6", no_argument, NULL, '6' },
{ "yes", no_argument, NULL, 'y' },
{ NULL, 0, NULL, 0 },
};
snprintf(pkgpath, MAXPATHLEN, "%s/sbin/pkg", getlocalbase());
while ((ch = getopt_long(argc, argv, "-:fr::yN46", longopts, NULL)) != -1) {
switch (ch) {
case 'f':
force = true;
break;
case 'N':
activation_test = true;
break;
case 'y':
yes = true;
break;
case '4':
fetchOpts = "4";
break;
case '6':
fetchOpts = "6";
break;
case 'r':
/*
* The repository can only be specified for an explicit
* bootstrap request at this time, so that we don't
* confuse the user if they're trying to use a verb that
* has some other conflicting meaning but we need to
* bootstrap.
*
* For that reason, we specify that -r has an optional
* argument above and process the next index ourselves.
* This is mostly significant because getopt(3) will
* otherwise eat the next argument, which could be
* something we need to try and make sense of.
*
* At worst this gets us false positives that we ignore
* in other contexts, and we have to do a little fudging
* in order to support separating -r from the reponame
* with a space since it's not actually optional in
* the bootstrap/add sense.
*/
if (add_pkg || bootstrap_only) {
if (optarg != NULL) {
repo_name = optarg;
} else if (optind < argc) {
repo_name = argv[optind];
}
if (repo_name == NULL || *repo_name == '\0') {
fprintf(stderr,
"Must specify a repository with -r!\n");
exit(EXIT_FAILURE);
}
if (optarg == NULL) {
/* Advance past repo name. */
optreset = 1;
optind++;
}
}
break;
case 1:
// Non-option arguments, first one is the command
if (command == NULL) {
command = argv[optind-1];
if (strcmp(command, "add") == 0) {
add_pkg = true;
}
else if (strcmp(command, "bootstrap") == 0) {
bootstrap_only = true;
}
}
// bootstrap doesn't accept other arguments
else if (bootstrap_only) {
fprintf(stderr, args_bootstrap_message);
exit(EXIT_FAILURE);
}
// For add, we accept exactly one further argument
else if (add_pkg && pkgarg != NULL) {
fprintf(stderr, args_add_message);
exit(EXIT_FAILURE);
}
else if (add_pkg) {
pkgarg = argv[optind-1];
}
break;
default:
break;
}
}
if ((bootstrap_only && force) || access(pkgpath, X_OK) == -1) {
/*
* To allow 'pkg -N' to be used as a reliable test for whether
* a system is configured to use pkg, don't bootstrap pkg
* when that that option is passed.
*/
if (activation_test)
errx(EXIT_FAILURE, "pkg is not installed");
config_init(repo_name);
if (add_pkg) {
if (pkgarg == NULL) {
fprintf(stderr, "Path to pkg.txz required\n");
exit(EXIT_FAILURE);
}
if (access(pkgarg, R_OK) == -1) {
fprintf(stderr, "No such file: %s\n", pkgarg);
exit(EXIT_FAILURE);
}
if (bootstrap_pkg_local(pkgarg, force) != 0)
exit(EXIT_FAILURE);
exit(EXIT_SUCCESS);
}
/*
* Do not ask for confirmation if either of stdin or stdout is
* not tty. Check the environment to see if user has answer
* tucked in there already.
*/
if (!yes)
config_bool(ASSUME_ALWAYS_YES, &yes);
if (!yes) {
if (!isatty(fileno(stdin))) {
fprintf(stderr, non_interactive_message);
exit(EXIT_FAILURE);
}
printf("%s", confirmation_message);
if (pkg_query_yes_no() == 0)
exit(EXIT_FAILURE);
}
if (bootstrap_pkg(force, fetchOpts) != 0)
exit(EXIT_FAILURE);
config_finish();
if (bootstrap_only)
exit(EXIT_SUCCESS);
} else if (bootstrap_only) {
printf("pkg already bootstrapped at %s\n", pkgpath);
exit(EXIT_SUCCESS);
}
execv(pkgpath, argv);
/* NOT REACHED */
return (EXIT_FAILURE);
}
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