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// SPDX-License-Identifier: GPL-3.0-or-later
#include "../../libnetdata.h"
#if defined(OS_WINDOWS)
#include "cached-sid-username.h"
typedef struct {
size_t len;
uint8_t sid[];
} SID_KEY;
typedef struct {
// IMPORTANT:
// This is malloc'd ! You have to manually set fields to zero.
STRING *account;
STRING *domain;
STRING *full;
STRING *sid_str;
// this needs to be last, because of its variable size
SID_KEY key;
} SID_VALUE;
#define SIMPLE_HASHTABLE_NAME _SID
#define SIMPLE_HASHTABLE_VALUE_TYPE SID_VALUE
#define SIMPLE_HASHTABLE_KEY_TYPE SID_KEY
#define SIMPLE_HASHTABLE_VALUE2KEY_FUNCTION sid_value_to_key
#define SIMPLE_HASHTABLE_COMPARE_KEYS_FUNCTION sid_cache_compar
#define SIMPLE_HASHTABLE_SAMPLE_IMPLEMENTATION 1
#include "libnetdata/simple_hashtable/simple_hashtable.h"
static struct {
SPINLOCK spinlock;
struct simple_hashtable_SID hashtable;
} sid_globals = {
.spinlock = NETDATA_SPINLOCK_INITIALIZER,
.hashtable = { 0 },
};
static inline SID_KEY *sid_value_to_key(SID_VALUE *s) {
return &s->key;
}
static inline bool sid_cache_compar(SID_KEY *a, SID_KEY *b) {
return a->len == b->len && memcmp(&a->sid, &b->sid, a->len) == 0;
}
void cached_sid_username_init(void) {
simple_hashtable_init_SID(&sid_globals.hashtable, 100);
}
static char *account2utf8(const wchar_t *user) {
static __thread char buffer[256];
if(utf16_to_utf8(buffer, sizeof(buffer), user, -1, NULL) == 0)
buffer[0] = '\0';
return buffer;
}
static char *domain2utf8(const wchar_t *domain) {
static __thread char buffer[256];
if(utf16_to_utf8(buffer, sizeof(buffer), domain, -1, NULL) == 0)
buffer[0] = '\0';
return buffer;
}
static void lookup_user_in_system(SID_VALUE *sv) {
static __thread wchar_t account_unicode[256];
static __thread wchar_t domain_unicode[256];
static __thread char tmp[512 + 2];
DWORD account_name_size = sizeof(account_unicode) / sizeof(account_unicode[0]);
DWORD domain_name_size = sizeof(domain_unicode) / sizeof(domain_unicode[0]);
SID_NAME_USE sid_type;
if (LookupAccountSidW(NULL, sv->key.sid, account_unicode, &account_name_size, domain_unicode, &domain_name_size, &sid_type)) {
const char *account = account2utf8(account_unicode);
const char *domain = domain2utf8(domain_unicode);
snprintfz(tmp, sizeof(tmp), "%s\\%s", domain, account);
sv->domain = string_strdupz(domain);
sv->account = string_strdupz(account);
sv->full = string_strdupz(tmp);
}
else {
sv->domain = NULL;
sv->account = NULL;
sv->full = NULL;
}
wchar_t *sid_string = NULL;
if (ConvertSidToStringSidW(sv->key.sid, &sid_string))
sv->sid_str = string_strdupz(account2utf8(sid_string));
else
sv->sid_str = NULL;
}
static SID_VALUE *lookup_or_convert_user_id_to_name_lookup(PSID sid) {
if(!sid || !IsValidSid(sid))
return NULL;
size_t size = GetLengthSid(sid);
size_t tmp_size = sizeof(SID_VALUE) + size;
size_t tmp_key_size = sizeof(SID_KEY) + size;
uint8_t buf[tmp_size];
SID_VALUE *tmp = (SID_VALUE *)&buf;
memcpy(&tmp->key.sid, sid, size);
tmp->key.len = size;
spinlock_lock(&sid_globals.spinlock);
SID_VALUE *found = simple_hashtable_get_SID(&sid_globals.hashtable, &tmp->key, tmp_key_size);
spinlock_unlock(&sid_globals.spinlock);
if(found) return found;
// allocate the SID_VALUE
found = mallocz(tmp_size);
memcpy(found, buf, tmp_size);
lookup_user_in_system(found);
// add it to the cache
spinlock_lock(&sid_globals.spinlock);
simple_hashtable_set_SID(&sid_globals.hashtable, &found->key, tmp_key_size, found);
spinlock_unlock(&sid_globals.spinlock);
return found;
}
bool cached_sid_to_account_domain_sidstr(PSID sid, TXT_UTF8 *dst_account, TXT_UTF8 *dst_domain, TXT_UTF8 *dst_sid_str) {
SID_VALUE *found = lookup_or_convert_user_id_to_name_lookup(sid);
if(found) {
if (found->account) {
txt_utf8_resize(dst_account, string_strlen(found->account) + 1, false);
memcpy(dst_account->data, string2str(found->account), string_strlen(found->account) + 1);
dst_account->used = string_strlen(found->account) + 1;
}
else
txt_utf8_empty(dst_account);
if (found->domain) {
txt_utf8_resize(dst_domain, string_strlen(found->domain) + 1, false);
memcpy(dst_domain->data, string2str(found->domain), string_strlen(found->domain) + 1);
dst_domain->used = string_strlen(found->domain) + 1;
}
else
txt_utf8_empty(dst_domain);
if (found->sid_str) {
txt_utf8_resize(dst_sid_str, string_strlen(found->sid_str) + 1, false);
memcpy(dst_sid_str->data, string2str(found->sid_str), string_strlen(found->sid_str) + 1);
dst_sid_str->used = string_strlen(found->sid_str) + 1;
}
else
txt_utf8_empty(dst_sid_str);
return true;
}
txt_utf8_empty(dst_account);
txt_utf8_empty(dst_domain);
txt_utf8_empty(dst_sid_str);
return false;
}
bool cached_sid_to_buffer_append(PSID sid, BUFFER *dst, const char *prefix) {
SID_VALUE *found = lookup_or_convert_user_id_to_name_lookup(sid);
size_t added = 0;
if(found) {
if (found->full) {
if (prefix && *prefix)
buffer_strcat(dst, prefix);
buffer_fast_strcat(dst, string2str(found->full), string_strlen(found->full));
added++;
}
if (found->sid_str) {
if (prefix && *prefix)
buffer_strcat(dst, prefix);
buffer_fast_strcat(dst, string2str(found->sid_str), string_strlen(found->sid_str));
added++;
}
}
return added > 0;
}
STRING *cached_sid_fullname_or_sid_str(PSID sid) {
SID_VALUE *found = lookup_or_convert_user_id_to_name_lookup(sid);
if(found) {
if(found->full) return string_dup(found->full);
return string_dup(found->sid_str);
}
return NULL;
}
#endif
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