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#include "cred_dict.h"
#include "util_rt.h"
#include "endian.h"
#include "strmap.h"
#include <string.h>
#include <errno.h>
void prne_init_cred_dict (prne_cred_dict_t *p) {
prne_memzero(p, sizeof(prne_cred_dict_t));
}
void prne_free_cred_dict (prne_cred_dict_t *p) {
if (p == NULL) {
return;
}
prne_free(p->arr);
prne_memzero(p, sizeof(prne_cred_dict_t));
}
bool prne_build_cred_dict (
const prne_cred_dict_raw_entry_t *arr,
const size_t cnt,
uint8_t **out_m,
size_t *out_l)
{
bool ret = false;
prne_strmap_t map;
uint8_t *m = NULL, *p;
size_t l = 0, strsize, sum_str;
uint16_t idx_id, idx_pw;
if (cnt > UINT16_MAX) {
errno = EOVERFLOW;
return false;
}
prne_init_strmap(&map);
// TRY
for (size_t i = 0; i < cnt; i += 1) {
if (arr[i].id == NULL || arr[i].pw == NULL) {
errno = EINVAL;
goto END;
}
prne_strmap_insert(&map, arr[i].id, 0);
prne_strmap_insert(&map, arr[i].pw, 0);
}
sum_str = 0;
for (size_t i = 0; i < map.size; i += 1) {
map.tbl[i].val = (prne_strmap_val_t)sum_str;
sum_str += strlen(map.tbl[i].key) + 1;
}
l = 2/*head*/ + 5 * cnt/*entries*/ + sum_str;
if (sum_str > UINT16_MAX || l > UINT16_MAX) {
errno = EOVERFLOW;
goto END;
}
p = m = (uint8_t*)prne_malloc(1, l);
if (m == NULL) {
goto END;
}
p[0] = prne_getmsb16(cnt, 0);
p[1] = prne_getmsb16(cnt, 1);
p += 2;
for (size_t i = 0; i < cnt; i += 1) {
idx_id = (uint16_t)(prne_strmap_lookup(&map, arr[i].id)->val);
idx_pw = (uint16_t)(prne_strmap_lookup(&map, arr[i].pw)->val);
p[0] = prne_getmsb16(idx_id, 0);
p[1] = prne_getmsb16(idx_id, 1);
p[2] = prne_getmsb16(idx_pw, 0);
p[3] = prne_getmsb16(idx_pw, 1);
p[4] = arr[i].weight;
p += 5;
}
for (size_t i = 0; i < map.size; i += 1) {
strsize = strlen(map.tbl[i].key) + 1;
memcpy(p, map.tbl[i].key, strsize);
p += strsize;
}
*out_m = m;
*out_l = l;
m = NULL;
ret = true;
END: // CATCH
prne_free(m);
prne_free_strmap(&map);
return ret;
}
bool prne_dser_cred_dict (
prne_cred_dict_t *dict,
const uint8_t *buf,
const size_t len)
{
prne_cred_dict_entry_t *arr = NULL;
size_t cnt, head_size, m_size;
const uint8_t *p = buf;
bool ret = false;
if (len < 2) {
errno = EINVAL;
return false;
}
cnt = prne_recmb_msb16(p[0], p[1]);
head_size = 2 + 5 * cnt;
if (head_size > len) {
errno = EINVAL;
return false;
}
if (cnt > 0 && buf[len - 1] != 0) {
errno = EINVAL;
return false;
}
p += 2;
m_size = len - head_size;
// TRY
arr = prne_malloc(sizeof(prne_cred_dict_entry_t), cnt);
if (cnt > 0 && arr == NULL) {
goto END;
}
for (size_t i = 0; i < cnt; i += 1) {
arr[i].id = prne_recmb_msb16(p[0], p[1]);
arr[i].pw = prne_recmb_msb16(p[2], p[3]);
arr[i].weight = p[4];
p += 5;
if (arr[i].id >= m_size || arr[i].pw >= m_size) {
errno = EINVAL;
goto END;
}
}
prne_free_cred_dict(dict);
dict->arr = arr;
dict->cnt = cnt;
dict->m = (const char *)(buf + head_size);
arr = NULL;
ret = true;
END:
prne_free(arr);
return ret;
}
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