Imported Upstream version 1.8.1p2

[debian/sudo] / plugins / sudoers / auth / rfc1938.c

diff --git a/plugins/sudoers/auth/rfc1938.c b/plugins/sudoers/auth/rfc1938.c
new file mode 100644 (file)
index 0000000..846b7b2
--- /dev/null
+++ b/plugins/sudoers/auth/rfc1938.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 1994-1996, 1998-2005, 2010-2011
+ *     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
+# include <string.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+#include <pwd.h>
+
+#if defined(HAVE_SKEY)
+# include <skey.h>
+# define RFC1938                               skey
+#  ifdef HAVE_RFC1938_SKEYCHALLENGE
+#   define rfc1938challenge(a,b,c,d)   skeychallenge((a),(b),(c),(d))
+#  else
+#   define rfc1938challenge(a,b,c,d)   skeychallenge((a),(b),(c))
+#  endif
+# define rfc1938verify(a,b)            skeyverify((a),(b))
+#elif defined(HAVE_OPIE)
+# include <opie.h>
+# define RFC1938                       opie
+# define rfc1938challenge(a,b,c,d)     opiechallenge((a),(b),(c))
+# define rfc1938verify(a,b)            opieverify((a),(b))
+#endif
+
+#include "sudoers.h"
+#include "sudo_auth.h"
+
+int
+rfc1938_setup(struct passwd *pw, char **promptp, sudo_auth *auth)
+{
+    char challenge[256];
+    static char *orig_prompt = NULL, *new_prompt = NULL;
+    static int op_len, np_size;
+    static struct RFC1938 rfc1938;
+
+    /* Stash a pointer to the rfc1938 struct if we have not initialized */
+    if (!auth->data)
+       auth->data = &rfc1938;
+
+    /* Save the original prompt */
+    if (orig_prompt == NULL) {
+       orig_prompt = *promptp;
+       op_len = strlen(orig_prompt);
+
+       /* Ignore trailing colon (we will add our own) */
+       if (orig_prompt[op_len - 1] == ':')
+           op_len--;
+       else if (op_len >= 2 && orig_prompt[op_len - 1] == ' '
+           && orig_prompt[op_len - 2] == ':')
+           op_len -= 2;
+    }
+
+#ifdef HAVE_SKEY
+    /* Close old stream */
+    if (rfc1938.keyfile)
+       (void) fclose(rfc1938.keyfile);
+#endif
+
+    /*
+     * Look up the user and get the rfc1938 challenge.
+     * If the user is not in the OTP db, only post a fatal error if
+     * we are running alone (since they may just use a normal passwd).
+     */
+    if (rfc1938challenge(&rfc1938, pw->pw_name, challenge, sizeof(challenge))) {
+       if (IS_ONEANDONLY(auth)) {
+           warningx("you do not exist in the %s database", auth->name);
+           return AUTH_FATAL;
+       } else {
+           return AUTH_FAILURE;
+       }
+    }
+
+    /* Get space for new prompt with embedded challenge */
+    if (np_size < op_len + strlen(challenge) + 7) {
+       np_size = op_len + strlen(challenge) + 7;
+       new_prompt = (char *) erealloc(new_prompt, np_size);
+    }
+
+    if (def_long_otp_prompt)
+       (void) snprintf(new_prompt, np_size, "%s\n%s", challenge, orig_prompt);
+    else
+       (void) snprintf(new_prompt, np_size, "%.*s [ %s ]:", op_len,
+           orig_prompt, challenge);
+
+    *promptp = new_prompt;
+    return AUTH_SUCCESS;
+}
+
+int
+rfc1938_verify(struct passwd *pw, char *pass, sudo_auth *auth)
+{
+
+    if (rfc1938verify((struct RFC1938 *) auth->data, pass) == 0)
+       return AUTH_SUCCESS;
+    else
+       return AUTH_FAILURE;
+}