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-rw-r--r--auth-bsdauth.c143
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diff --git a/auth-bsdauth.c b/auth-bsdauth.c
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+/* $OpenBSD: auth-bsdauth.c,v 1.15 2018/07/09 21:35:50 markus Exp $ */
+/*
+ * Copyright (c) 2001 Markus Friedl. 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 ``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 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 "includes.h"
+
+#include <sys/types.h>
+#include <stdarg.h>
+#include <stdio.h>
+
+#ifdef BSD_AUTH
+#include "xmalloc.h"
+#include "sshkey.h"
+#include "sshbuf.h"
+#include "hostfile.h"
+#include "auth.h"
+#include "log.h"
+#ifdef GSSAPI
+#include "ssh-gss.h"
+#endif
+#include "monitor_wrap.h"
+
+static void *
+bsdauth_init_ctx(Authctxt *authctxt)
+{
+ return authctxt;
+}
+
+int
+bsdauth_query(void *ctx, char **name, char **infotxt,
+ u_int *numprompts, char ***prompts, u_int **echo_on)
+{
+ Authctxt *authctxt = ctx;
+ char *challenge = NULL;
+
+ *infotxt = NULL;
+ *numprompts = 0;
+ *prompts = NULL;
+ *echo_on = NULL;
+
+ if (authctxt->as != NULL) {
+ debug2("bsdauth_query: try reuse session");
+ challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE);
+ if (challenge == NULL) {
+ auth_close(authctxt->as);
+ authctxt->as = NULL;
+ }
+ }
+
+ if (challenge == NULL) {
+ debug2("bsdauth_query: new bsd auth session");
+ debug3("bsdauth_query: style %s",
+ authctxt->style ? authctxt->style : "<default>");
+ authctxt->as = auth_userchallenge(authctxt->user,
+ authctxt->style, "auth-ssh", &challenge);
+ if (authctxt->as == NULL)
+ challenge = NULL;
+ debug2("bsdauth_query: <%s>", challenge ? challenge : "empty");
+ }
+
+ if (challenge == NULL)
+ return -1;
+
+ *name = xstrdup("");
+ *infotxt = xstrdup("");
+ *numprompts = 1;
+ *prompts = xcalloc(*numprompts, sizeof(char *));
+ *echo_on = xcalloc(*numprompts, sizeof(u_int));
+ (*prompts)[0] = xstrdup(challenge);
+
+ return 0;
+}
+
+int
+bsdauth_respond(void *ctx, u_int numresponses, char **responses)
+{
+ Authctxt *authctxt = ctx;
+ int authok;
+
+ if (!authctxt->valid)
+ return -1;
+
+ if (authctxt->as == NULL)
+ error("bsdauth_respond: no bsd auth session");
+
+ if (numresponses != 1)
+ return -1;
+
+ authok = auth_userresponse(authctxt->as, responses[0], 0);
+ authctxt->as = NULL;
+ debug3("bsdauth_respond: <%s> = <%d>", responses[0], authok);
+
+ return (authok == 0) ? -1 : 0;
+}
+
+static void
+bsdauth_free_ctx(void *ctx)
+{
+ Authctxt *authctxt = ctx;
+
+ if (authctxt && authctxt->as) {
+ auth_close(authctxt->as);
+ authctxt->as = NULL;
+ }
+}
+
+KbdintDevice bsdauth_device = {
+ "bsdauth",
+ bsdauth_init_ctx,
+ bsdauth_query,
+ bsdauth_respond,
+ bsdauth_free_ctx
+};
+
+KbdintDevice mm_bsdauth_device = {
+ "bsdauth",
+ bsdauth_init_ctx,
+ mm_bsdauth_query,
+ mm_bsdauth_respond,
+ bsdauth_free_ctx
+};
+#endif