X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=plugins%2Fsudoers%2Fauth%2Frfc1938.c;fp=plugins%2Fsudoers%2Fauth%2Frfc1938.c;h=f4ed7c0f6de2ff9b11af2cec93d35279ca8d1052;hb=6ad45aa23af5f5f3b54468937d6a13089201b891;hp=0000000000000000000000000000000000000000;hpb=97bd3ae46779c69fcdab82d0c64bdf05be009ec3;p=debian%2Fsudo

diff --git a/plugins/sudoers/auth/rfc1938.c b/plugins/sudoers/auth/rfc1938.c
new file mode 100644
index 0000000..f4ed7c0
--- /dev/null
+++ b/plugins/sudoers/auth/rfc1938.c
@@ -0,0 +1,136 @@
+/*
+ * 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
+sudo_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;
+    debug_decl(sudo_rfc1938_setup, SUDO_DEBUG_AUTH)
+
+    /* 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);
+	    debug_return_int(AUTH_FATAL);
+	} else {
+	    debug_return_int(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;
+    debug_return_int(AUTH_SUCCESS);
+}
+
+int
+sudo_rfc1938_verify(struct passwd *pw, char *pass, sudo_auth *auth)
+{
+    debug_decl(sudo_rfc1938_verify, SUDO_DEBUG_AUTH)
+
+    if (rfc1938verify((struct RFC1938 *) auth->data, pass) == 0)
+	debug_return_int(AUTH_SUCCESS);
+    else
+	debug_return_int(AUTH_FAILURE);
+}