1 files changed, 143 insertions, 0 deletions
diff --git a/auth-bsdauth.c b/auth-bsdauth.c
new file mode 100644
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--- /dev/null
+++ b/auth-bsdauth.c
@@ -0,0 +1,143 @@
+/* $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