Modular sudo front-end which loads policy and I/O plugins that do

most the actual work. Currently relies on dynamic loading using dlopen(). See doc/plugin.pod for the plugin API.
2010-02-20 09:41:49 -05:00
parent 90c06ad7f2
commit b6a4cf7233
18 changed files with 2445 additions and 452 deletions
--- a/src/conversation.c
+++ b/src/conversation.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 1999-2005, 2007-2009 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <stdio.h>
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+#  include <stdlib.h>
+# endif
+#endif /* STDC_HEADERS */
+#ifdef HAVE_STRING_H
+# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
+#  include <memory.h>
+# endif
+# include <string.h>
+#else
+# ifdef HAVE_STRINGS_H
+#  include <strings.h>
+# endif
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+
+#include "sudo.h"
+#include "sudo_plugin.h"
+
+extern int tgetpass_flags; /* XXX */
+
+/*
+ * Sudo conversation function.
+ */
+int
+sudo_conversation(int num_msgs, const struct sudo_conv_message msgs[],
+    struct sudo_conv_reply replies[])
+{
+    struct sudo_conv_reply *repl;
+    const struct sudo_conv_message *msg;
+    char *pass;
+    int n, flags = tgetpass_flags;
+
+    for (n = 0; n < num_msgs; n++) {
+	msg = &msgs[n];
+	repl = &replies[n];
+	switch (msg->msg_type) {
+	    case SUDO_CONV_PROMPT_ECHO_ON:
+		SET(flags, TGP_ECHO);
+	    case SUDO_CONV_PROMPT_ECHO_OFF:
+		/* Read the password unless interrupted. */
+		/* XXX - look up passwd timeout and pass in XXX */
+		pass = tgetpass(msg->msg, 0, flags);
+		if (pass == NULL)
+		    goto err;
+		repl->reply = estrdup(pass);
+		zero_bytes(pass, strlen(pass));
+		break;
+	    case SUDO_CONV_INFO_MSG:
+		if (msg->msg)
+		    (void) puts(msg->msg);
+		break;
+	    case SUDO_CONV_ERROR_MSG:
+		if (msg->msg) {
+		    (void) fputs(msg->msg, stderr);
+		    (void) fputc('\n', stderr);
+		}
+		break;
+	    default:
+		goto err;
+	}
+    }
+
+    return(0);
+
+err:
+    /* Zero and free allocated memory and return an error. */
+    do {
+	repl = &replies[n];
+	if (repl->reply != NULL) {
+	    zero_bytes(repl->reply, strlen(repl->reply));
+	    free(repl->reply);
+	    repl->reply = NULL;
+	}
+    } while (n--);
+
+    return(-1);
+}