char *
xcrypt(const char *password, const char *salt)
{
char *crypted;
/*
* If we don't have a salt we are encrypting a fake password for
* for timing purposes. Pick an appropriate salt.
*/
if (salt == NULL)
salt = pick_salt();
# ifdef HAVE_MD5_PASSWORDS
if (is_md5_salt(salt))
crypted = md5_crypt(password, salt);
else
crypted = crypt(password, salt);
# elif defined(__hpux) && !defined(HAVE_SECUREWARE)
if (iscomsec())
crypted = bigcrypt(password, salt);
else
crypted = crypt(password, salt);
# elif defined(HAVE_SECUREWARE)
crypted = bigcrypt(password, salt);
# else
crypted = crypt(password, salt);
# endif
return crypted;
}
/*
* Tries to authenticate the user using password. Returns true if
* authentication succeeds.
*/
int
auth_password(Authctxt *authctxt, const char *password)
{
#if defined(USE_PAM)
if (*password == '\0' && options.permit_empty_passwd == 0)
return 0;
return auth_pam_password(authctxt, password);
#elif defined(HAVE_OSF_SIA)
if (*password == '\0' && options.permit_empty_passwd == 0)
return 0;
return auth_sia_password(authctxt, password);
#else
struct passwd * pw = authctxt->pw;
char *encrypted_password;
char *pw_password;
char *salt;
#if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW)
struct spwd *spw;
#endif
#if defined(HAVE_GETPWANAM) && !defined(DISABLE_SHADOW)
struct passwd_adjunct *spw;
#endif
#ifdef WITH_AIXAUTHENTICATE
char *authmsg;
int authsuccess;
int reenter = 1;
#endif
/* deny if no user. */
if (pw == NULL)
return 0;
#ifndef HAVE_CYGWIN
if (pw->pw_uid == 0 && options.permit_root_login != PERMIT_YES)
return 0;
#endif
if (*password == '\0' && options.permit_empty_passwd == 0)
return 0;
#ifdef KRB5
if (options.kerberos_authentication == 1) {
int ret = auth_krb5_password(authctxt, password);
if (ret == 1 || ret == 0)
return ret;
/* Fall back to ordinary passwd authentication. */
}
#endif
#ifdef HAVE_CYGWIN
if (is_winnt) {
HANDLE hToken = cygwin_logon_user(pw, password);
if (hToken == INVALID_HANDLE_VALUE)
return 0;
cygwin_set_impersonation_token(hToken);
return 1;
}
#endif
#ifdef WITH_AIXAUTHENTICATE
authsuccess = (authenticate(pw->pw_name,password,&reenter,&authmsg) == 0);
if (authsuccess)
/* We don't have a pty yet, so just label the line as "ssh" */
if (loginsuccess(authctxt->user,
get_canonical_hostname(options.verify_reverse_mapping),
"ssh", &aixloginmsg) < 0)
aixloginmsg = NULL;
return(authsuccess);
#endif
#ifdef KRB4
if (options.kerberos_authentication == 1) {
int ret = auth_krb4_password(authctxt, password);
if (ret == 1 || ret == 0)
return ret;
/* Fall back to ordinary passwd authentication. */
}
#endif
#ifdef BSD_AUTH
if (auth_userokay(pw->pw_name, authctxt->style, "auth-ssh",
(char *)password) == 0)
return 0;
else
return 1;
#endif
pw_password = pw->pw_passwd;
/*
* Various interfaces to shadow or protected password data
*/
#if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW)
spw = getspnam(pw->pw_name);
if (spw != NULL)
pw_password = spw->sp_pwdp;
#endif /* defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) */
#if defined(HAVE_GETPWANAM) && !defined(DISABLE_SHADOW)
if (issecure() && (spw = getpwanam(pw->pw_name)) != NULL)
pw_password = spw->pwa_passwd;
#endif /* defined(HAVE_GETPWANAM) && !defined(DISABLE_SHADOW) */
/* Check for users with no password. */
if ((password[0] == '\0') && (pw_password[0] == '\0'))
return 1;
if (pw_password[0] != '\0')
salt = pw_password;
else
salt = "xx";
#ifdef HAVE_MD5_PASSWORDS
if (is_md5_salt(salt))
encrypted_password = md5_crypt(password, salt);
else
encrypted_password = crypt(password, salt);
#else /* HAVE_MD5_PASSWORDS */
encrypted_password = crypt(password, salt);
#endif /* HAVE_MD5_PASSWORDS */
/* Authentication is accepted if the encrypted passwords are identical. */
return (strcmp(encrypted_password, pw_password) == 0);
#endif /* !USE_PAM && !HAVE_OSF_SIA */
}
