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-rw-r--r--source4/auth/auth_unix.c337
1 files changed, 332 insertions, 5 deletions
diff --git a/source4/auth/auth_unix.c b/source4/auth/auth_unix.c
index 33095f2d5a..990cf5568b 100644
--- a/source4/auth/auth_unix.c
+++ b/source4/auth/auth_unix.c
@@ -24,7 +24,6 @@
#include "auth/auth.h"
#include "system/passwd.h"
-
/* TODO: look at how to best fill in parms retrieveing a struct passwd info
* except in case USER_INFO_DONT_CHECK_UNIX_ACCOUNT is set
*/
@@ -426,12 +425,337 @@ static NTSTATUS check_unix_password(TALLOC_CTX *ctx, const struct auth_usersuppl
#else
+static NTSTATUS talloc_getpwnam(TALLOC_CTX *ctx, char *username, struct passwd **pws)
+{
+ struct passwd *ret;
+ struct passwd *from;
+
+ *pws = NULL;
+
+ ret = talloc(ctx, struct passwd);
+ NT_STATUS_HAVE_NO_MEMORY(ret);
+
+ from = getpwnam(username);
+ if (!from) {
+ return NT_STATUS_NO_SUCH_USER;
+ }
+
+ ret->pw_name = talloc_strdup(ctx, from->pw_name);
+ NT_STATUS_HAVE_NO_MEMORY(ret->pw_name);
+
+ ret->pw_passwd = talloc_strdup(ctx, from->pw_passwd);
+ NT_STATUS_HAVE_NO_MEMORY(ret->pw_passwd);
+
+ ret->pw_uid = from->pw_uid;
+ ret->pw_gid = from->pw_gid;
+ ret->pw_gecos = talloc_strdup(ctx, from->pw_gecos);
+ NT_STATUS_HAVE_NO_MEMORY(ret->pw_gecos);
+
+ ret->pw_dir = talloc_strdup(ctx, from->pw_dir);
+ NT_STATUS_HAVE_NO_MEMORY(ret->pw_dir);
+
+ ret->pw_shell = talloc_strdup(ctx, from->pw_shell);
+ NT_STATUS_HAVE_NO_MEMORY(ret->pw_shell);
+
+ *pws = ret;
+
+ return NT_STATUS_OK;
+}
+
+
+/****************************************************************************
+core of password checking routine
+****************************************************************************/
+static NTSTATUS password_check(const char *username, const char *password,
+ const char *crypted, const char *salt)
+{
+ BOOL ret;
+
+#ifdef WITH_AFS
+ if (afs_auth(username, password))
+ return NT_STATUS_OK;
+#endif /* WITH_AFS */
+
+#ifdef WITH_DFS
+ if (dfs_auth(username, password))
+ return NT_STATUS_OK;
+#endif /* WITH_DFS */
+
+#ifdef OSF1_ENH_SEC
+
+ ret = (strcmp(osf1_bigcrypt(password, salt), crypted) == 0);
+
+ if (!ret) {
+ DEBUG(2,
+ ("OSF1_ENH_SEC failed. Trying normal crypt.\n"));
+ ret = (strcmp((char *)crypt(password, salt), crypted) == 0);
+ }
+ if (ret) {
+ return NT_STATUS_OK;
+ } else {
+ return NT_STATUS_WRONG_PASSWORD;
+ }
+
+#endif /* OSF1_ENH_SEC */
+
+#ifdef ULTRIX_AUTH
+ ret = (strcmp((char *)crypt16(password, salt), crypted) == 0);
+ if (ret) {
+ return NT_STATUS_OK;
+ } else {
+ return NT_STATUS_WRONG_PASSWORD;
+ }
+
+#endif /* ULTRIX_AUTH */
+
+#ifdef LINUX_BIGCRYPT
+ ret = (linux_bigcrypt(password, salt, crypted));
+ if (ret) {
+ return NT_STATUS_OK;
+ } else {
+ return NT_STATUS_WRONG_PASSWORD;
+ }
+#endif /* LINUX_BIGCRYPT */
+
+#if defined(HAVE_BIGCRYPT) && defined(HAVE_CRYPT) && defined(USE_BOTH_CRYPT_CALLS)
+
+ /*
+ * Some systems have bigcrypt in the C library but might not
+ * actually use it for the password hashes (HPUX 10.20) is
+ * a noteable example. So we try bigcrypt first, followed
+ * by crypt.
+ */
+
+ if (strcmp(bigcrypt(password, salt), crypted) == 0)
+ return NT_STATUS_OK;
+ else
+ ret = (strcmp((char *)crypt(password, salt), crypted) == 0);
+ if (ret) {
+ return NT_STATUS_OK;
+ } else {
+ return NT_STATUS_WRONG_PASSWORD;
+ }
+#else /* HAVE_BIGCRYPT && HAVE_CRYPT && USE_BOTH_CRYPT_CALLS */
+
+#ifdef HAVE_BIGCRYPT
+ ret = (strcmp(bigcrypt(password, salt), crypted) == 0);
+ if (ret) {
+ return NT_STATUS_OK;
+ } else {
+ return NT_STATUS_WRONG_PASSWORD;
+ }
+#endif /* HAVE_BIGCRYPT */
+
+#ifndef HAVE_CRYPT
+ DEBUG(1, ("Warning - no crypt available\n"));
+ return NT_STATUS_LOGON_FAILURE;
+#else /* HAVE_CRYPT */
+ ret = (strcmp((char *)crypt(password, salt), crypted) == 0);
+ if (ret) {
+ return NT_STATUS_OK;
+ } else {
+ return NT_STATUS_WRONG_PASSWORD;
+ }
+#endif /* HAVE_CRYPT */
+#endif /* HAVE_BIGCRYPT && HAVE_CRYPT && USE_BOTH_CRYPT_CALLS */
+}
+
+/**
+ Does a string have any lowercase chars in it?
+**/
+static BOOL strhaslower(const char *s)
+{
+ while (*s) {
+ if (islower(*s)) return True;
+ s++;
+ }
+ return False;
+}
+
+/**
+ Does a string have any uppercase chars in it?
+**/
+static BOOL strhasupper(const char *s)
+{
+ while (*s) {
+ if (isupper(*s)) return True;
+ s++;
+ }
+ return False;
+}
+
static NTSTATUS check_unix_password(TALLOC_CTX *ctx, const struct auth_usersupplied_info *user_info)
{
- return NT_STATUS_NOT_IMPLEMENTED;
+ char *username;
+ char *password;
+ char *pwcopy;
+ char *salt;
+ char *crypted;
+ struct passwd *pws;
+ NTSTATUS nt_status;
+ int level = lp_passwordlevel();
+
+ username = talloc_strdup(ctx, user_info->account_name);
+ password = talloc_strdup(ctx, user_info->plaintext_password.data);
+
+ nt_status = talloc_getpwnam(ctx, username, &pws);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ return nt_status;
+ }
+
+ crypted = pws->pw_passwd;
+ salt = pws->pw_passwd;
+
+#ifdef HAVE_GETSPNAM
+ {
+ struct spwd *spass;
+
+ /* many shadow systems require you to be root to get
+ the password, in most cases this should already be
+ the case when this function is called, except
+ perhaps for IPC password changing requests */
+
+ spass = getspnam(pws->pw_name);
+ if (spass && spass->sp_pwdp) {
+ crypted = talloc_strdup(ctx, spass->sp_pwdp);
+ NT_STATUS_HAVE_NO_MEMORY(crypted);
+ salt = talloc_strdup(ctx, spass->sp_pwdp);
+ NT_STATUS_HAVE_NO_MEMORY(salt);
+ }
+ }
+#elif defined(IA_UINFO)
+ {
+ char *ia_password;
+ /* Need to get password with SVR4.2's ia_ functions
+ instead of get{sp,pw}ent functions. Required by
+ UnixWare 2.x, tested on version
+ 2.1. (tangent@cyberport.com) */
+ uinfo_t uinfo;
+ if (ia_openinfo(pws->pw_name, &uinfo) != -1) {
+ ia_get_logpwd(uinfo, &ia_password);
+ crypted = talloc_strdup(ctx, ia_password);
+ NT_STATUS_HAVE_NO_MEMORY(crypted);
+ }
+ }
+#endif
+
+#ifdef HAVE_GETPRPWNAM
+ {
+ struct pr_passwd *pr_pw = getprpwnam(pws->pw_name);
+ if (pr_pw && pr_pw->ufld.fd_encrypt) {
+ crypted = talloc_strdup(ctx, pr_pw->ufld.fd_encrypt);
+ NT_STATUS_HAVE_NO_MEMORY(crypted);
+ }
+ }
+#endif
+
+#ifdef HAVE_GETPWANAM
+ {
+ struct passwd_adjunct *pwret;
+ pwret = getpwanam(s);
+ if (pwret && pwret->pwa_passwd) {
+ crypted = talloc_strdup(ctx, pwret->pwa_passwd);
+ NT_STATUS_HAVE_NO_MEMORY(crypted);
+ }
+ }
+#endif
+
+#ifdef OSF1_ENH_SEC
+ {
+ struct pr_passwd *mypasswd;
+ DEBUG(5,("Checking password for user %s in OSF1_ENH_SEC\n", username));
+ mypasswd = getprpwnam(username);
+ if (mypasswd) {
+ username = talloc_strdup(ctx, mypasswd->ufld.fd_name);
+ NT_STATUS_HAVE_NO_MEMORY(username);
+ crypted = talloc_strdup(ctx, mypasswd->ufld.fd_encrypt);
+ NT_STATUS_HAVE_NO_MEMORY(crypted);
+ } else {
+ DEBUG(5,("OSF1_ENH_SEC: No entry for user %s in protected database !\n", username));
+ }
+ }
+#endif
+
+#ifdef ULTRIX_AUTH
+ {
+ AUTHORIZATION *ap = getauthuid(pws->pw_uid);
+ if (ap) {
+ crypted = talloc_strdup(ctx, ap->a_password);
+ endauthent();
+ NT_STATUS_HAVE_NO_MEMORY(crypted);
+ }
+ }
+#endif
+
+#if defined(HAVE_TRUNCATED_SALT)
+ /* crypt on some platforms (HPUX in particular)
+ won't work with more than 2 salt characters. */
+ salt[2] = 0;
+#endif
+
+ if (crypted[0] == '\0') {
+ if (!lp_null_passwords()) {
+ DEBUG(2, ("Disallowing %s with null password\n", username));
+ return NT_STATUS_LOGON_FAILURE;
+ }
+ if (password == NULL) {
+ DEBUG(3, ("Allowing access to %s with null password\n", username));
+ return NT_STATUS_OK;
+ }
+ }
+
+ /* try it as it came to us */
+ nt_status = password_check(username, password, crypted, salt);
+ if NT_STATUS_IS_OK(nt_status) {
+ return nt_status;
+ }
+ else if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD)) {
+ /* No point continuing if its not the password thats to blame (ie PAM disabled). */
+ return nt_status;
+ }
+
+ if ( user_info->flags | USER_INFO_CASE_INSENSITIVE_PASSWORD) {
+ return nt_status;
+ }
+
+ /* if the password was given to us with mixed case then we don't
+ * need to proceed as we know it hasn't been case modified by the
+ * client */
+ if (strhasupper(password) && strhaslower(password)) {
+ return nt_status;
+ }
+
+ /* make a copy of it */
+ pwcopy = talloc_strdup(ctx, password);
+ if (!pwcopy)
+ return NT_STATUS_NO_MEMORY;
+
+ /* try all lowercase if it's currently all uppercase */
+ if (strhasupper(pwcopy)) {
+ strlower(pwcopy);
+ nt_status = password_check(username, pwcopy, crypted, salt);
+ if NT_STATUS_IS_OK(nt_status) {
+ return nt_status;
+ }
+ }
+
+ /* give up? */
+ if (level < 1) {
+ return NT_STATUS_WRONG_PASSWORD;
+ }
+
+ /* last chance - all combinations of up to level chars upper! */
+ strlower(pwcopy);
+
+#if 0
+ if (NT_STATUS_IS_OK(nt_status = string_combinations(pwcopy, password_check, level))) {
+ return nt_status;
+ }
+#endif
+ return NT_STATUS_WRONG_PASSWORD;
}
-#endif /*(HAVE_SECURITY_PAM_APPL_H)*/
+#endif
/** Check a plaintext username/password
*
@@ -454,16 +778,19 @@ static NTSTATUS authunix_check_password(struct auth_method_context *ctx,
return NT_STATUS_NO_MEMORY;
}
- nt_status = check_unix_password(mem_ctx, user_info);
+ nt_status = check_unix_password(check_ctx, user_info);
if ( ! NT_STATUS_IS_OK(nt_status)) {
+ talloc_free(check_ctx);
return nt_status;
}
- nt_status = authunix_make_server_info(mem_ctx, user_info, server_info);
+ nt_status = authunix_make_server_info(check_ctx, user_info, server_info);
if ( ! NT_STATUS_IS_OK(nt_status)) {
+ talloc_free(check_ctx);
return nt_status;
}
+ talloc_free(check_ctx);
return NT_STATUS_OK;
}
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