Imported Upstream version 1.8.1p2

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

diff --git a/plugins/sudoers/auth/passwd.c b/plugins/sudoers/auth/passwd.c
new file mode 100644 (file)
index 0000000..ee0e4d3
--- /dev/null
+++ b/plugins/sudoers/auth/passwd.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 1999-2005, 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>
+
+#include "sudoers.h"
+#include "sudo_auth.h"
+
+#define DESLEN                 13
+#define HAS_AGEINFO(p, l)      (l == 18 && p[DESLEN] == ',')
+
+int
+passwd_init(struct passwd *pw, char **promptp, sudo_auth *auth)
+{
+#ifdef HAVE_SKEYACCESS
+    if (skeyaccess(pw, user_tty, NULL, NULL) == 0)
+       return AUTH_FAILURE;
+#endif
+    sudo_setspent();
+    auth->data = sudo_getepw(pw);
+    sudo_endspent();
+    return AUTH_SUCCESS;
+}
+
+int
+passwd_verify(struct passwd *pw, char *pass, sudo_auth *auth)
+{
+    char sav, *epass;
+    char *pw_epasswd = auth->data;
+    size_t pw_len;
+    int error;
+
+    pw_len = strlen(pw_epasswd);
+
+#ifdef HAVE_GETAUTHUID
+    /* Ultrix shadow passwords may use crypt16() */
+    error = strcmp(pw_epasswd, (char *) crypt16(pass, pw_epasswd));
+    if (!error)
+       return AUTH_SUCCESS;
+#endif /* HAVE_GETAUTHUID */
+
+    /*
+     * Truncate to 8 chars if standard DES since not all crypt()'s do this.
+     * If this turns out not to be safe we will have to use OS #ifdef's (sigh).
+     */
+    sav = pass[8];
+    if (pw_len == DESLEN || HAS_AGEINFO(pw_epasswd, pw_len))
+       pass[8] = '\0';
+
+    /*
+     * Normal UN*X password check.
+     * HP-UX may add aging info (separated by a ',') at the end so
+     * only compare the first DESLEN characters in that case.
+     */
+    epass = (char *) crypt(pass, pw_epasswd);
+    pass[8] = sav;
+    if (HAS_AGEINFO(pw_epasswd, pw_len) && strlen(epass) == DESLEN)
+       error = strncmp(pw_epasswd, epass, DESLEN);
+    else
+       error = strcmp(pw_epasswd, epass);
+
+    return error ? AUTH_FAILURE : AUTH_SUCCESS;
+}
+
+int
+passwd_cleanup(pw, auth)
+    struct passwd *pw;
+    sudo_auth *auth;
+{
+    char *pw_epasswd = auth->data;
+
+    if (pw_epasswd != NULL) {
+       zero_bytes(pw_epasswd, strlen(pw_epasswd));
+       efree(pw_epasswd);
+    }
+    return AUTH_SUCCESS;
+}