+ Buffer buffer;
+ struct pam_ctxt *ctxt = ctx;
+ size_t plen;
+ u_char type;
+ char *msg;
+ size_t len, mlen;
+
+ debug3("PAM: %s entering", __func__);
+ buffer_init(&buffer);
+ *name = xstrdup("");
+ *info = xstrdup("");
+ *prompts = xmalloc(sizeof(char *));
+ **prompts = NULL;
+ plen = 0;
+ *echo_on = xmalloc(sizeof(u_int));
+ while (ssh_msg_recv(ctxt->pam_psock, &buffer) == 0) {
+ type = buffer_get_char(&buffer);
+ msg = buffer_get_string(&buffer, NULL);
+ mlen = strlen(msg);
+ switch (type) {
+ case PAM_PROMPT_ECHO_ON:
+ case PAM_PROMPT_ECHO_OFF:
+ *num = 1;
+ len = plen + mlen + 1;
+ **prompts = xrealloc(**prompts, 1, len);
+ strlcpy(**prompts + plen, msg, len - plen);
+ plen += mlen;
+ **echo_on = (type == PAM_PROMPT_ECHO_ON);
+ xfree(msg);
+ return (0);
+ case PAM_ERROR_MSG:
+ case PAM_TEXT_INFO:
+ /* accumulate messages */
+ len = plen + mlen + 2;
+ **prompts = xrealloc(**prompts, 1, len);
+ strlcpy(**prompts + plen, msg, len - plen);
+ plen += mlen;
+ strlcat(**prompts + plen, "\n", len - plen);
+ plen++;
+ xfree(msg);
+ break;
+ case PAM_ACCT_EXPIRED:
+ sshpam_account_status = 0;
+ /* FALLTHROUGH */
+ case PAM_AUTH_ERR:
+ debug3("PAM: %s", pam_strerror(sshpam_handle, type));
+ if (**prompts != NULL && strlen(**prompts) != 0) {
+ *info = **prompts;
+ **prompts = NULL;
+ *num = 0;
+ **echo_on = 0;
+ ctxt->pam_done = -1;
+ xfree(msg);
+ return 0;
+ }
+ /* FALLTHROUGH */
+ case PAM_SUCCESS:
+ if (**prompts != NULL) {
+ /* drain any accumulated messages */
+ debug("PAM: %s", **prompts);
+ buffer_append(&loginmsg, **prompts,
+ strlen(**prompts));
+ xfree(**prompts);
+ **prompts = NULL;
+ }
+ if (type == PAM_SUCCESS) {
+ if (!sshpam_authctxt->valid ||
+ (sshpam_authctxt->pw->pw_uid == 0 &&
+ options.permit_root_login != PERMIT_YES))
+ fatal("Internal error: PAM auth "
+ "succeeded when it should have "
+ "failed");
+ import_environments(&buffer);
+ *num = 0;
+ **echo_on = 0;
+ ctxt->pam_done = 1;
+ xfree(msg);
+ return (0);
+ }
+ error("PAM: %s for %s%.100s from %.100s", msg,
+ sshpam_authctxt->valid ? "" : "illegal user ",
+ sshpam_authctxt->user,
+ get_remote_name_or_ip(utmp_len, options.use_dns));
+ /* FALLTHROUGH */
+ default:
+ *num = 0;
+ **echo_on = 0;
+ xfree(msg);
+ ctxt->pam_done = -1;
+ return (-1);
+ }
+ }
+ return (-1);