improved kbd-interactive support. work by per@appgate.com and me

1 files changed, 116 insertions, 0 deletions

diff --git a/usr.bin/ssh/auth-bsdauth.c b/usr.bin/ssh/auth-bsdauth.c
new file mode 100644
index 00000000000..3732477deb0
--- /dev/null
+++ b/usr.bin/ssh/auth-bsdauth.c
@@ -0,0 +1,116 @@
+/*
+ * 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"
+RCSID("$OpenBSD: auth-bsdauth.c,v 1.1 2001/05/18 14:13:28 markus Exp $");
+
+#ifdef BSD_AUTH
+#include "xmalloc.h"
+#include "auth.h"
+#include "log.h"
+
+static void *
+bsdauth_init_ctx(Authctxt *authctxt)
+{
+	return authctxt;
+}
+
+static int
+bsdauth_query(void *ctx, char **name, char **infotxt, 
+   u_int *numprompts, char ***prompts, u_int **echo_on)
+{
+        Authctxt *authctxt = ctx;
+        char *challenge = 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 = xmalloc(*numprompts * sizeof(char*));
+        *echo_on = xmalloc(*numprompts * sizeof(u_int));
+        (*echo_on)[0] = 0;
+        (*prompts)[0] = xstrdup(challenge);
+
+        return 0;
+}
+
+static int
+bsdauth_respond(void *ctx, u_int numresponses, char **responses)
+{
+        Authctxt *authctxt = ctx;
+        int authok;
+        
+        if (authctxt->as == 0)
+                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
+};
+#endif