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/*
SSSD - auth utils helpers
Copyright (C) Sumit Bose <sbose@redhat.com> 2015
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/>.
*/
/* This file is use by SSSD clients and the main daemons. Please do not add
* code which is specific to only one of them. */
#include <errno.h>
#include "sss_client/sss_cli.h"
errno_t sss_auth_pack_2fa_blob(const char *fa1, size_t fa1_len,
const char *fa2, size_t fa2_len,
uint8_t *buf, size_t buf_len,
size_t *_2fa_blob_len)
{
size_t c;
uint32_t tmp_uint32_t;
if (fa1 == NULL || *fa1 == '\0' || fa1_len > UINT32_MAX
|| fa2 == NULL || *fa2 == '\0' || fa2_len > UINT32_MAX
|| (buf == NULL && buf_len != 0)) {
return EINVAL;
}
if (fa1_len == 0) {
fa1_len = strlen(fa1);
} else {
if (fa1[fa1_len] != '\0') {
return EINVAL;
}
}
if (fa2_len == 0) {
fa2_len = strlen(fa2);
} else {
if (fa2[fa2_len] != '\0') {
return EINVAL;
}
}
*_2fa_blob_len = fa1_len + fa2_len + 2 + 2 * sizeof(uint32_t);
if (buf == NULL || buf_len < *_2fa_blob_len) {
return EAGAIN;
}
c = 0;
tmp_uint32_t = (uint32_t) fa1_len + 1;
SAFEALIGN_COPY_UINT32(buf, &tmp_uint32_t, &c);
tmp_uint32_t = (uint32_t) fa2_len + 1;
SAFEALIGN_COPY_UINT32(buf + c, &tmp_uint32_t, &c);
memcpy(buf + c, fa1, fa1_len + 1);
c += fa1_len + 1;
memcpy(buf + c, fa2, fa2_len + 1);
return 0;
}
errno_t sss_auth_pack_sc_blob(const char *pin, size_t pin_len,
const char *token_name, size_t token_name_len,
const char *module_name, size_t module_name_len,
const char *key_id, size_t key_id_len,
uint8_t *buf, size_t buf_len,
size_t *_sc_blob_len)
{
size_t c;
uint32_t tmp_uint32_t;
if (pin_len > UINT32_MAX || token_name_len > UINT32_MAX
|| module_name_len > UINT32_MAX
|| (pin_len != 0 && pin == NULL)
|| (token_name_len != 0 && token_name == NULL)
|| (module_name_len != 0 && module_name == NULL)
|| (key_id_len != 0 && key_id == NULL)) {
return EINVAL;
}
/* A missing pin is ok in the case of a reader with a keyboard */
if (pin == NULL) {
pin = "";
pin_len = 0;
}
if (token_name == NULL) {
token_name = "";
token_name_len = 0;
}
if (module_name == NULL) {
module_name = "";
module_name_len = 0;
}
if (key_id == NULL) {
key_id = "";
key_id_len = 0;
}
/* len should not include the trailing \0 */
if (pin_len == 0 || pin[pin_len - 1] == '\0') {
pin_len = strlen(pin);
}
if (token_name_len == 0 || token_name[token_name_len - 1] == '\0') {
token_name_len = strlen(token_name);
}
if (module_name_len == 0 || module_name[module_name_len - 1] == '\0') {
module_name_len = strlen(module_name);
}
if (key_id_len == 0 || key_id[key_id_len - 1] == '\0') {
key_id_len = strlen(key_id);
}
*_sc_blob_len = pin_len + token_name_len + module_name_len + key_id_len + 4
+ 4 * sizeof(uint32_t);
if (buf == NULL || buf_len < *_sc_blob_len) {
return EAGAIN;
}
c = 0;
tmp_uint32_t = (uint32_t) pin_len + 1;
SAFEALIGN_COPY_UINT32(buf, &tmp_uint32_t, &c);
tmp_uint32_t = (uint32_t) token_name_len + 1;
SAFEALIGN_COPY_UINT32(buf + c, &tmp_uint32_t, &c);
tmp_uint32_t = (uint32_t) module_name_len + 1;
SAFEALIGN_COPY_UINT32(buf + c, &tmp_uint32_t, &c);
tmp_uint32_t = (uint32_t) key_id_len + 1;
SAFEALIGN_COPY_UINT32(buf + c, &tmp_uint32_t, &c);
memcpy(buf + c, pin, pin_len);
buf[c + pin_len] = '\0';
c += pin_len + 1;
memcpy(buf + c, token_name, token_name_len);
buf[c + token_name_len] = '\0';
c += token_name_len + 1;
memcpy(buf + c, module_name, module_name_len);
buf[c + module_name_len] = '\0';
c += module_name_len + 1;
memcpy(buf + c, key_id, key_id_len);
buf[c + key_id_len] = '\0';
return 0;
}
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