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/*
SSSD - auth utils
Copyright (C) Simo Sorce <simo@redhat.com> 2012
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "authtok.h"
struct sss_auth_token {
enum sss_authtok_type type;
uint8_t *data;
size_t length;
};
enum sss_authtok_type sss_authtok_get_type(struct sss_auth_token *tok)
{
return tok->type;
}
size_t sss_authtok_get_size(struct sss_auth_token *tok)
{
if (!tok) {
return 0;
}
switch (tok->type) {
case SSS_AUTHTOK_TYPE_PASSWORD:
case SSS_AUTHTOK_TYPE_CCFILE:
return tok->length;
case SSS_AUTHTOK_TYPE_EMPTY:
return 0;
}
return EINVAL;
}
uint8_t *sss_authtok_get_data(struct sss_auth_token *tok)
{
if (!tok) {
return NULL;
}
return tok->data;
}
errno_t sss_authtok_get_password(struct sss_auth_token *tok,
const char **pwd, size_t *len)
{
if (!tok) {
return EFAULT;
}
switch (tok->type) {
case SSS_AUTHTOK_TYPE_EMPTY:
return ENOENT;
case SSS_AUTHTOK_TYPE_PASSWORD:
*pwd = (const char *)tok->data;
if (len) {
*len = tok->length - 1;
}
return EOK;
case SSS_AUTHTOK_TYPE_CCFILE:
return EACCES;
}
return EINVAL;
}
errno_t sss_authtok_get_ccfile(struct sss_auth_token *tok,
const char **ccfile, size_t *len)
{
if (!tok) {
return EINVAL;
}
switch (tok->type) {
case SSS_AUTHTOK_TYPE_EMPTY:
return ENOENT;
case SSS_AUTHTOK_TYPE_CCFILE:
*ccfile = (const char *)tok->data;
if (len) {
*len = tok->length - 1;
}
return EOK;
case SSS_AUTHTOK_TYPE_PASSWORD:
return EACCES;
}
return EINVAL;
}
static errno_t sss_authtok_set_string(struct sss_auth_token *tok,
enum sss_authtok_type type,
const char *context_name,
const char *str, size_t len)
{
size_t size;
if (len == 0) {
len = strlen(str);
} else {
while (len > 0 && str[len - 1] == '\0') len--;
}
if (len == 0) {
/* we do not allow zero length typed tokens */
return EINVAL;
}
size = len + 1;
tok->data = talloc_named(tok, size, "%s", context_name);
if (!tok->data) {
return ENOMEM;
}
memcpy(tok->data, str, len);
tok->data[len] = '\0';
tok->type = type;
tok->length = size;
return EOK;
}
void sss_authtok_set_empty(struct sss_auth_token *tok)
{
if (!tok) {
return;
}
switch (tok->type) {
case SSS_AUTHTOK_TYPE_EMPTY:
return;
case SSS_AUTHTOK_TYPE_PASSWORD:
safezero(tok->data, tok->length);
break;
case SSS_AUTHTOK_TYPE_CCFILE:
break;
}
tok->type = SSS_AUTHTOK_TYPE_EMPTY;
talloc_zfree(tok->data);
tok->length = 0;
}
errno_t sss_authtok_set_password(struct sss_auth_token *tok,
const char *password, size_t len)
{
sss_authtok_set_empty(tok);
return sss_authtok_set_string(tok, SSS_AUTHTOK_TYPE_PASSWORD,
"password", password, len);
}
errno_t sss_authtok_set_ccfile(struct sss_auth_token *tok,
const char *ccfile, size_t len)
{
sss_authtok_set_empty(tok);
return sss_authtok_set_string(tok, SSS_AUTHTOK_TYPE_CCFILE,
"ccfile", ccfile, len);
}
errno_t sss_authtok_set(struct sss_auth_token *tok,
enum sss_authtok_type type,
const uint8_t *data, size_t len)
{
switch (type) {
case SSS_AUTHTOK_TYPE_PASSWORD:
return sss_authtok_set_password(tok, (const char *)data, len);
case SSS_AUTHTOK_TYPE_CCFILE:
return sss_authtok_set_ccfile(tok, (const char *)data, len);
case SSS_AUTHTOK_TYPE_EMPTY:
sss_authtok_set_empty(tok);
return EOK;
}
return EINVAL;
}
errno_t sss_authtok_copy(struct sss_auth_token *src,
struct sss_auth_token *dst)
{
if (!src || !dst) {
return EINVAL;
}
sss_authtok_set_empty(dst);
if (src->type == SSS_AUTHTOK_TYPE_EMPTY) {
return EOK;
}
dst->data = talloc_memdup(dst, src->data, src->length);
if (!dst->data) {
return ENOMEM;
}
dst->length = src->length;
dst->type = src->type;
return EOK;
}
struct sss_auth_token *sss_authtok_new(TALLOC_CTX *mem_ctx)
{
struct sss_auth_token *token;
token = talloc_zero(mem_ctx, struct sss_auth_token);
if (token == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "talloc_zero failed.\n");
}
return token;
}
void sss_authtok_wipe_password(struct sss_auth_token *tok)
{
if (!tok || tok->type != SSS_AUTHTOK_TYPE_PASSWORD) {
return;
}
safezero(tok->data, tok->length);
}
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