static int
input_gssapi_exchange_complete(int type, u_int32_t plen, struct ssh *ssh)
{
Authctxt *authctxt = ssh->authctxt;
int r, authenticated;
const char *displayname;
if (authctxt == NULL || (authctxt->methoddata == NULL && !use_privsep))
fatal("No authentication or GSSAPI context");
/*
* We don't need to check the status, because we're only enabled in
* the dispatcher once the exchange is complete
*/
if ((r = sshpkt_get_end(ssh)) != 0)
fatal("%s: %s", __func__, ssh_err(r));
authenticated = PRIVSEP(ssh_gssapi_userok(authctxt->user));
if ((!use_privsep || mm_is_monitor()) &&
(displayname = ssh_gssapi_displayname()) != NULL)
auth2_record_info(authctxt, "%s", displayname);
authctxt->postponed = 0;
ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_GSSAPI_TOKEN, NULL);
ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_GSSAPI_ERRTOK, NULL);
ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_GSSAPI_MIC, NULL);
ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE, NULL);
userauth_finish(ssh, authenticated, "gssapi-with-mic", NULL);
return 0;
}
void
auth_log(Authctxt *authctxt, int authenticated, int partial,
const char *method, const char *submethod)
{
void (*authlog) (const char *fmt,...) = verbose;
char *authmsg;
if (use_privsep && !mm_is_monitor() && !authctxt->postponed)
return;
/* Raise logging level */
if (authenticated == 1 ||
!authctxt->valid ||
authctxt->failures >= options.max_authtries / 2 ||
strcmp(method, "password") == 0)
authlog = logit;
if (authctxt->postponed)
authmsg = "Postponed";
else if (partial)
authmsg = "Partial";
else {
authmsg = authenticated ? "Accepted" : "Failed";
BLACKLIST_NOTIFY(authenticated ?
BLACKLIST_AUTH_OK : BLACKLIST_AUTH_FAIL);
}
authlog("%s %s%s%s for %s%.100s from %.200s port %d %s%s%s",
authmsg,
method,
submethod != NULL ? "/" : "", submethod == NULL ? "" : submethod,
authctxt->valid ? "" : "invalid user ",
authctxt->user,
get_remote_ipaddr(),
get_remote_port(),
compat20 ? "ssh2" : "ssh1",
authctxt->info != NULL ? ": " : "",
authctxt->info != NULL ? authctxt->info : "");
free(authctxt->info);
authctxt->info = NULL;
#ifdef CUSTOM_FAILED_LOGIN
if (authenticated == 0 && !authctxt->postponed &&
(strcmp(method, "password") == 0 ||
strncmp(method, "keyboard-interactive", 20) == 0 ||
strcmp(method, "challenge-response") == 0))
record_failed_login(authctxt->user,
get_canonical_hostname(options.use_dns), "ssh");
# ifdef WITH_AIXAUTHENTICATE
if (authenticated)
sys_auth_record_login(authctxt->user,
get_canonical_hostname(options.use_dns), "ssh", &loginmsg);
# endif
#endif
#ifdef SSH_AUDIT_EVENTS
if (authenticated == 0 && !authctxt->postponed)
audit_event(audit_classify_auth(method));
#endif
}
void
auth_log(Authctxt *authctxt, int authenticated, char *method, char *info)
{
void (*authlog) (const char *fmt,...) = verbose;
char *authmsg;
if (use_privsep && !mm_is_monitor() && !authctxt->postponed)
return;
/* Raise logging level */
if (authenticated == 1 ||
!authctxt->valid ||
authctxt->failures >= options.max_authtries / 2 ||
strcmp(method, "password") == 0)
authlog = logit;
if (authctxt->postponed)
authmsg = "Postponed";
else
authmsg = authenticated ? "Accepted" : "Failed";
authlog("%s %s for %s%.100s from %.200s port %d%s",
authmsg,
method,
authctxt->valid ? "" : "invalid user ",
authctxt->user,
get_remote_ipaddr(),
get_remote_port(),
info);
#ifdef CUSTOM_FAILED_LOGIN
if (authenticated == 0 && !authctxt->postponed &&
(strcmp(method, "password") == 0 ||
strncmp(method, "keyboard-interactive", 20) == 0 ||
strcmp(method, "challenge-response") == 0))
record_failed_login(authctxt->user,
get_canonical_hostname(options.use_dns), "ssh");
# ifdef WITH_AIXAUTHENTICATE
if (authenticated)
sys_auth_record_login(authctxt->user,
get_canonical_hostname(options.use_dns), "ssh", &loginmsg);
# endif
#endif
#ifdef SSH_AUDIT_EVENTS
if (authenticated == 0 && !authctxt->postponed)
audit_event(audit_classify_auth(method));
#endif
#ifdef SECURITY_COUNTS
if (strcmp(method, "password") == 0)
access__attempted(!authenticated, authctxt->user);
#endif
}
static int
input_gssapi_mic(int type, u_int32_t plen, struct ssh *ssh)
{
Authctxt *authctxt = ssh->authctxt;
Gssctxt *gssctxt;
int r, authenticated = 0;
struct sshbuf *b;
gss_buffer_desc mic, gssbuf;
const char *displayname;
u_char *p;
size_t len;
if (authctxt == NULL || (authctxt->methoddata == NULL && !use_privsep))
fatal("No authentication or GSSAPI context");
gssctxt = authctxt->methoddata;
if ((r = sshpkt_get_string(ssh, &p, &len)) != 0)
fatal("%s: %s", __func__, ssh_err(r));
if ((b = sshbuf_new()) == NULL)
fatal("%s: sshbuf_new failed", __func__);
mic.value = p;
mic.length = len;
ssh_gssapi_buildmic(b, authctxt->user, authctxt->service,
"gssapi-with-mic");
if ((gssbuf.value = sshbuf_mutable_ptr(b)) == NULL)
fatal("%s: sshbuf_mutable_ptr failed", __func__);
gssbuf.length = sshbuf_len(b);
if (!GSS_ERROR(PRIVSEP(ssh_gssapi_checkmic(gssctxt, &gssbuf, &mic))))
authenticated = PRIVSEP(ssh_gssapi_userok(authctxt->user));
else
logit("GSSAPI MIC check failed");
sshbuf_free(b);
free(mic.value);
if ((!use_privsep || mm_is_monitor()) &&
(displayname = ssh_gssapi_displayname()) != NULL)
auth2_record_info(authctxt, "%s", displayname);
authctxt->postponed = 0;
ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_GSSAPI_TOKEN, NULL);
ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_GSSAPI_ERRTOK, NULL);
ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_GSSAPI_MIC, NULL);
ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE, NULL);
userauth_finish(ssh, authenticated, "gssapi-with-mic", NULL);
return 0;
}
void
auth_log(Authctxt *authctxt, int authenticated, int partial,
const char *method, const char *submethod)
{
struct ssh *ssh = active_state; /* XXX */
void (*authlog) (const char *fmt,...) = verbose;
const char *authmsg;
char *extra = NULL;
if (use_privsep && !mm_is_monitor() && !authctxt->postponed)
return;
/* Raise logging level */
if (authenticated == 1 ||
!authctxt->valid ||
authctxt->failures >= options.max_authtries / 2 ||
strcmp(method, "password") == 0)
authlog = logit;
if (authctxt->postponed)
authmsg = "Postponed";
else if (partial)
authmsg = "Partial";
else
authmsg = authenticated ? "Accepted" : "Failed";
if ((extra = format_method_key(authctxt)) == NULL) {
if (authctxt->auth_method_info != NULL)
extra = xstrdup(authctxt->auth_method_info);
}
authlog("%s %s%s%s for %s%.100s from %.200s port %d ssh2%s%s",
authmsg,
method,
submethod != NULL ? "/" : "", submethod == NULL ? "" : submethod,
authctxt->valid ? "" : "invalid user ",
authctxt->user,
ssh_remote_ipaddr(ssh),
ssh_remote_port(ssh),
extra != NULL ? ": " : "",
extra != NULL ? extra : "");
free(extra);
if (!authctxt->postponed)
pfilter_notify(!authenticated);
}
void
sshpam_cleanup(void)
{
if (sshpam_handle == NULL || (use_privsep && !mm_is_monitor()))
return;
debug("PAM: cleanup");
pam_set_item(sshpam_handle, PAM_CONV, (const void *)&null_conv);
if (sshpam_session_open) {
debug("PAM: closing session");
pam_close_session(sshpam_handle, PAM_SILENT);
sshpam_session_open = 0;
}
if (sshpam_cred_established) {
debug("PAM: deleting credentials");
pam_setcred(sshpam_handle, PAM_DELETE_CRED);
sshpam_cred_established = 0;
}
sshpam_authenticated = 0;
pam_end(sshpam_handle, sshpam_err);
sshpam_handle = NULL;
}
void
auth_log(Authctxt *authctxt, int authenticated, int partial,
const char *method, const char *submethod)
{
struct ssh *ssh = active_state; /* XXX */
int level = SYSLOG_LEVEL_VERBOSE;
const char *authmsg;
char *extra = NULL;
if (use_privsep && !mm_is_monitor() && !authctxt->postponed)
return;
/* Raise logging level */
if (authenticated == 1 ||
!authctxt->valid ||
authctxt->failures >= options.max_authtries / 2 ||
strcmp(method, "password") == 0)
level = SYSLOG_LEVEL_INFO;
if (authctxt->postponed)
authmsg = "Postponed";
else if (partial)
authmsg = "Partial";
else
authmsg = authenticated ? "Accepted" : "Failed";
if ((extra = format_method_key(authctxt)) == NULL) {
if (authctxt->auth_method_info != NULL)
extra = xstrdup(authctxt->auth_method_info);
}
do_log2(level, "%s %s%s%s for %s%.100s from %.200s port %d ssh2%s%s",
authmsg,
method,
submethod != NULL ? "/" : "", submethod == NULL ? "" : submethod,
authctxt->valid ? "" : "invalid user ",
authctxt->user,
ssh_remote_ipaddr(ssh),
ssh_remote_port(ssh),
extra != NULL ? ": " : "",
extra != NULL ? extra : "");
free(extra);
#ifdef CUSTOM_FAILED_LOGIN
if (authenticated == 0 && !authctxt->postponed &&
(strcmp(method, "password") == 0 ||
strncmp(method, "keyboard-interactive", 20) == 0 ||
strcmp(method, "challenge-response") == 0))
record_failed_login(authctxt->user,
auth_get_canonical_hostname(ssh, options.use_dns), "ssh");
# ifdef WITH_AIXAUTHENTICATE
if (authenticated)
sys_auth_record_login(authctxt->user,
auth_get_canonical_hostname(ssh, options.use_dns), "ssh",
&loginmsg);
# endif
#endif
#ifdef SSH_AUDIT_EVENTS
if (authenticated == 0 && !authctxt->postponed)
audit_event(audit_classify_auth(method));
#endif
}
void
auth_log(Authctxt *authctxt, int authenticated, char *method, char *info)
{
void (*authlog) (const char *fmt,...) = verbose;
void (*final_authlog) (const char *fmt,...) = logit_notice;
char *authmsg;
char *gecos = NULL;
int is_none_first_failure = 0;
if (use_privsep && !mm_is_monitor() && !authctxt->postponed)
return;
/*
* Avoid unhelpful messages about "Failed none", which happen
* because the infrastructure always first tries to see if
* logging in with an empty password will work.
*/
if (authenticated == 0 && !(authctxt->postponed) &&
authctxt->failures == 0 && strcmp(method, "none") == 0) {
is_none_first_failure = 1;
authlog = debug;
final_authlog = debug;
}
/* Raise logging level */
else if (authenticated == 1 ||
!authctxt->valid ||
authctxt->failures >= AUTH_FAIL_LOG ||
strcmp(method, "password") == 0)
authlog = logit;
if (authctxt->postponed)
authmsg = "Postponed";
else
authmsg = authenticated ? "Accepted" : "Failed";
if (authctxt->valid || aaa_log_unknown_usernames_flag) {
(*authlog)("%s %s for %s%.100s from %.200s port %d%s",
authmsg,
method,
authctxt->valid ? "" : "unknown user ",
authctxt->user,
get_remote_ipaddr(),
get_remote_port(),
info);
}
else {
debug("%s %s for %s%.100s from %.200s port %d%s",
authmsg,
method,
authctxt->valid ? "" : "unknown user ",
authctxt->user,
get_remote_ipaddr(),
get_remote_port(),
info);
(*authlog)("%s %s for unknown user from %.200s port %d%s",
authmsg,
method,
get_remote_ipaddr(),
get_remote_port(),
info);
}
if (!(authctxt->postponed)) {
gecos = get_gecos(authctxt->user);
if (authenticated) {
(*final_authlog)("%s %s%s logged in via%s from %s",
authctxt->valid ? "User" : "Unknown user",
authctxt->user, gecos ? gecos : "",
info, get_remote_ipaddr());
}
else {
if (authctxt->valid || aaa_log_unknown_usernames_flag) {
(*final_authlog)("%s %s%s failed to login via%s from %s",
authctxt->valid ? "User" : "Unknown user",
authctxt->user, gecos ? gecos : "",
info, get_remote_ipaddr());
}
else {
debug("%s %s%s failed to login via%s from %s",
authctxt->valid ? "User" : "Unknown user",
authctxt->user, gecos ? gecos : "",
info, get_remote_ipaddr());
(*final_authlog)("Unknown user failed to login via%s from %s",
info, get_remote_ipaddr());
}
}
if (gecos) {
free(gecos);
}
}
#ifdef CUSTOM_FAILED_LOGIN
if (authenticated == 0 && !authctxt->postponed &&
!is_none_first_failure &&
(strcmp(method, "password") == 0 ||
strncmp(method, "keyboard-interactive", 20) == 0 ||
strcmp(method, "challenge-response") == 0))
record_failed_login(authctxt->user,
get_canonical_hostname(options.use_dns), "ssh");
#endif
}
void
auth_log(Authctxt *authctxt, int authenticated, int partial,
const char *method, const char *submethod, const char *info)
{
void (*authlog) (const char *fmt,...) = verbose;
char *authmsg;
if (use_privsep && !mm_is_monitor() && !authctxt->postponed)
return;
/* Raise logging level */
if (authenticated == 1 ||
!authctxt->valid ||
authctxt->failures >= options.max_authtries / 2 ||
strcmp(method, "password") == 0)
authlog = logit;
if (authctxt->postponed)
authmsg = "Postponed";
else if (partial)
authmsg = "Partial";
else
authmsg = authenticated ? "Accepted" : "Failed";
authlog("%s %s%s%s for %s%.100s from %.200s port %d%s",
authmsg,
method,
submethod != NULL ? "/" : "", submethod == NULL ? "" : submethod,
authctxt->valid ? "" : "invalid user ",
authctxt->user,
get_remote_ipaddr(),
get_remote_port(),
info);
#ifdef NERSC_MOD
char* t1buf = encode_string(authctxt->user, strlen(authctxt->user) );
char* t2buf = encode_string(method, strlen(method) );
char* t3buf = encode_string(authmsg, strlen(authmsg) );
s_audit("auth_info_3", "count=%i uristring=%s uristring=%s uristring=%s addr=%.200s port=%d/tcp addr=%s port=%s/tcp",
client_session_id, t3buf, t1buf, t2buf, get_remote_ipaddr(), get_remote_port(), n_ntop,
n_port);
free(t1buf);
free(t2buf);
free(t3buf);
#endif
#ifdef CUSTOM_FAILED_LOGIN
if (authenticated == 0 && !authctxt->postponed &&
(strcmp(method, "password") == 0 ||
strncmp(method, "keyboard-interactive", 20) == 0 ||
strcmp(method, "challenge-response") == 0))
record_failed_login(authctxt->user,
get_canonical_hostname(options.use_dns), "ssh");
# ifdef WITH_AIXAUTHENTICATE
if (authenticated)
sys_auth_record_login(authctxt->user,
get_canonical_hostname(options.use_dns), "ssh", &loginmsg);
# endif
#endif
#ifdef SSH_AUDIT_EVENTS
if (authenticated == 0 && !authctxt->postponed)
audit_event(audit_classify_auth(method));
#endif
}