#include <grp.h>
#include <syslog.h>
#include <errno.h>
+#if HAVE_SHADOW_H
+#include <shadow.h>
+#endif
#include "includes.h"
static void __dead
usage(void)
{
- fprintf(stderr, "usage: doas [-nsv] [-a style] [-C config] [-u user]"
- " command [args]\n");
+ fprintf(stderr, "usage: doas [-nsv] "
+#ifdef HAVE_BSD_AUTH_H
+ "[-a style] "
+#endif
+ "[-C config] [-u user] command [args]\n");
exit(1);
}
}
}
+#ifdef HAVE_BSD_AUTH_H
+static void
+authuser(const char *myname, const char *login_style)
+{
+ char *challenge = NULL, *response, rbuf[1024], cbuf[128];
+ auth_session_t *as;
+
+ if (!(as = auth_userchallenge(myname, login_style, "auth-doas",
+ &challenge)))
+ errx(1, "Authorization failed");
+ if (!challenge) {
+ char host[HOST_NAME_MAX + 1];
+ if (gethostname(host, sizeof(host)))
+ snprintf(host, sizeof(host), "?");
+ snprintf(cbuf, sizeof(cbuf),
+ "\rdoas (%.32s@%.32s) password: ", myname, host);
+ challenge = cbuf;
+ }
+ response = readpassphrase(challenge, rbuf, sizeof(rbuf),
+ RPP_REQUIRE_TTY);
+ if (response == NULL && errno == ENOTTY) {
+ syslog(LOG_AUTHPRIV | LOG_NOTICE,
+ "tty required for %s", myname);
+ errx(1, "a tty is required");
+ }
+ if (!auth_userresponse(as, response, 0)) {
+ syslog(LOG_AUTHPRIV | LOG_NOTICE,
+ "failed auth for %s", myname);
+ errc(1, EPERM, NULL);
+ }
+ explicit_bzero(rbuf, sizeof(rbuf));
+}
+#elif HAVE_SHADOW_H
+static void
+authuser(const char *myname, const char *login_style)
+{
+ const char *hash;
+ char *encrypted;
+ struct passwd *pw;
+
+ (void)login_style;
+ (void)persist;
+
+ if (!(pw = getpwnam(myname)))
+ err(1, "getpwnam");
+
+ hash = pw->pw_passwd;
+ if (hash[0] == 'x' && hash[1] == '\0') {
+ struct spwd *sp;
+ if (!(sp = getspnam(myname)))
+ errx(1, "Authorization failed");
+ hash = sp->sp_pwdp;
+ } else if (hash[0] != '*') {
+ errx(1, "Authorization failed");
+ }
+
+ char *challenge, *response, rbuf[1024], cbuf[128], host[HOST_NAME_MAX + 1];
+ if (gethostname(host, sizeof(host)))
+ snprintf(host, sizeof(host), "?");
+ snprintf(cbuf, sizeof(cbuf),
+ "\rdoas (%.32s@%.32s) password: ", myname, host);
+ challenge = cbuf;
+
+ response = readpassphrase(challenge, rbuf, sizeof(rbuf), RPP_REQUIRE_TTY);
+ if (response == NULL && errno == ENOTTY) {
+ syslog(LOG_AUTHPRIV | LOG_NOTICE,
+ "tty required for %s", myname);
+ errx(1, "a tty is required");
+ }
+ if (!(encrypted = crypt(response, hash)))
+ errx(1, "crypt");
+ if (strcmp(encrypted, hash) != 0) {
+ syslog(LOG_AUTHPRIV | LOG_NOTICE, "failed auth for %s", myname);
+ errx(1, "Authorization failed");
+ }
+ explicit_bzero(rbuf, sizeof(rbuf));
+}
+#endif /* HAVE_BSD_AUTH_H */
+
int
main(int argc, char **argv)
{
char cwdpath[PATH_MAX];
const char *cwd;
char **envp;
-#ifdef HAVE_BSD_AUTH_H
char *login_style = NULL;
-#endif
setprogname("doas");
- if (pledge("stdio rpath getpw tty proc exec id", NULL) == -1)
+ if (pledge("stdio rpath getpw tty recvfd proc exec id", NULL) == -1)
err(1, "pledge");
- /* closefrom(STDERR_FILENO + 1); */
+ closefrom(STDERR_FILENO + 1);
uid = getuid();
#ifdef HAVE_BSD_AUTH_H
# define OPTSTRING "a:C:nsu:v"
#else
-# define OPTSTRING "C:nsu:v"
+# define OPTSTRING "+C:nsu:v"
#endif
while ((ch = getopt(argc, argv, OPTSTRING)) != -1) {
if (sflag) {
sh = getenv("SHELL");
- if (sh == NULL || *sh == '\0')
- shargv[0] = pw->pw_shell;
- else
+ if (sh == NULL || *sh == '\0') {
+ shargv[0] = strdup(pw->pw_shell);
+ if (shargv[0] == NULL)
+ err(1, NULL);
+ } else
shargv[0] = sh;
argv = shargv;
argc = 1;
parseconfig("/etc/doas.conf", 1);
/* cmdline is used only for logging, no need to abort on truncate */
- (void) strlcpy(cmdline, argv[0], sizeof(cmdline));
+ (void)strlcpy(cmdline, argv[0], sizeof(cmdline));
for (i = 1; i < argc; i++) {
if (strlcat(cmdline, " ", sizeof(cmdline)) >= sizeof(cmdline))
break;
cmd = argv[0];
if (!permit(uid, groups, ngroups, &rule, target, cmd,
- (const char**)argv + 1)) {
+ (const char **)argv + 1)) {
syslog(LOG_AUTHPRIV | LOG_NOTICE,
"failed command for %s: %s", myname, cmdline);
errc(1, EPERM, NULL);
}
- pw = getpwuid(target);
- if (!pw)
- errx(1, "no passwd entry for target");
-
-#ifdef HAVE_BSD_AUTH_H
+#if defined(HAVE_BSD_AUTH_H) || defined(HAVE_SHADOW_H)
if (!(rule->options & NOPASS)) {
if (nflag)
errx(1, "Authorization required");
- char *challenge = NULL, *response, rbuf[1024], cbuf[128];
- auth_session_t *as;
-
- if (!(as = auth_userchallenge(myname, login_style, "auth-doas",
- &challenge)))
- errx(1, "Authorization failed");
- if (!challenge) {
- char host[HOST_NAME_MAX + 1];
- if (gethostname(host, sizeof(host)))
- snprintf(host, sizeof(host), "?");
- snprintf(cbuf, sizeof(cbuf),
- "\rdoas (%.32s@%.32s) password: ", myname, host);
- challenge = cbuf;
- }
- response = readpassphrase(challenge, rbuf, sizeof(rbuf),
- RPP_REQUIRE_TTY);
- if (response == NULL && errno == ENOTTY) {
- syslog(LOG_AUTHPRIV | LOG_NOTICE,
- "tty required for %s", myname);
- errx(1, "a tty is required");
- }
- if (!auth_userresponse(as, response, 0)) {
- syslog(LOG_AUTHPRIV | LOG_NOTICE,
- "failed auth for %s", myname);
- errc(1, EPERM, NULL);
- }
- explicit_bzero(rbuf, sizeof(rbuf));
+ authuser(myname, login_style);
}
#elif HAVE_PAM_APPL_H
+ pw = getpwuid(target);
+ if (!pw)
+ errx(1, "no passwd entry for target");
+
if (!pamauth(pw->pw_name, myname, !nflag, rule->options & NOPASS)) {
syslog(LOG_AUTHPRIV | LOG_NOTICE, "failed auth for %s", myname);
- errc(1, EPERM, NULL);
+ errx(1, "Authorization failed");
}
#else
- if (!(rule->options & NOPASS)) {
- errx(1, "Authorization required");
+#error "No authentication method"
#endif /* HAVE_BSD_AUTH_H */
if (pledge("stdio rpath getpw exec id", NULL) == -1)
err(1, "pledge");
+ pw = getpwuid(target);
+ if (!pw)
+ errx(1, "no passwd entry for target");
+
#ifdef HAVE_BSD_AUTH_H
if (setusercontext(NULL, pw, target, LOGIN_SETGROUP |
LOGIN_SETPRIORITY | LOGIN_SETRESOURCES | LOGIN_SETUMASK |
errx(1, "failed to set user context for target");
#else
if (setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) != 0)
- errx(1, "setgid");
+ errx(1, "setresgid");
if (initgroups(pw->pw_name, pw->pw_gid) != 0)
errx(1, "initgroups");
if (setresuid(target, target, target) != 0)
- errx(1, "setuid");
+ errx(1, "setresuid");
#endif
if (pledge("stdio rpath exec", NULL) == -1)
projects / opendoas.git / blobdiff