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; }
int mm_answer_gss_userok(int sock, Buffer *m) { int authenticated; const char *displayname; if (!options.gss_authentication) fatal("%s: GSSAPI authentication not enabled", __func__); authenticated = authctxt->valid && ssh_gssapi_userok(authctxt->user); buffer_clear(m); buffer_put_int(m, authenticated); debug3("%s: sending result %d", __func__, authenticated); mm_request_send(sock, MONITOR_ANS_GSSUSEROK, m); auth_method = "gssapi-with-mic"; if ((displayname = ssh_gssapi_displayname()) != NULL) auth2_record_info(authctxt, "%s", displayname); /* Monitor loop will terminate if authenticated */ return (authenticated); }
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; }