Mercurial > dovecot > original-hg > dovecot-1.2
view src/auth/userinfo-shadow.c @ 804:bf38c8f30a4c HEAD
Added safe_memset() which guarantees that compiler optimizations don't
optimize it away. Not that we really need to clear the passwords from
memory, but won't hurt much either :)
author | Timo Sirainen <tss@iki.fi> |
---|---|
date | Wed, 18 Dec 2002 12:40:43 +0200 |
parents | ae9e39383a72 |
children | 5ac361acb316 |
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/* Loosely based on auth_shadow.c from popa3d by Solar Designer <solar@openwall.com> Copyright (C) 2002 Timo Sirainen */ #include "config.h" #undef HAVE_CONFIG_H #ifdef USERINFO_SHADOW #include "userinfo-passwd.h" #include "mycrypt.h" #include <shadow.h> static int shadow_verify_plain(const char *user, const char *password, AuthCookieReplyData *reply) { struct passwd *pw; struct spwd *spw; char *passdup; int result; spw = getspnam(user); if (spw == NULL || !IS_VALID_PASSWD(spw->sp_pwdp)) return FALSE; /* check if the password is valid */ passdup = t_strdup_noconst(password); result = strcmp(mycrypt(passdup, spw->sp_pwdp), spw->sp_pwdp) == 0; /* clear the passwords from memory */ safe_memset(passdup, 0, strlen(passdup)); safe_memset(spw->sp_pwdp, 0, strlen(spw->sp_pwdp)); if (!result) return FALSE; /* password ok, save the user info */ pw = getpwnam(user); if (pw == NULL) return FALSE; passwd_fill_cookie_reply(pw, reply); return TRUE; } static void shadow_deinit(void) { endpwent(); endspent(); } UserInfoModule userinfo_shadow = { NULL, shadow_deinit, shadow_verify_plain, NULL }; #endif