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User: Convert to new hashing API

This commit is contained in:
Peter Keresztes Schmidt 2021-05-25 20:50:02 +02:00
parent 2bda413698
commit 837b32ccff
1 changed files with 27 additions and 48 deletions
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75
src/zm_user.cpp
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@ -22,17 +22,8 @@
#include "zm_crypt.h"
#include "zm_logger.h"
#include "zm_utils.h"
#include <cassert>
#include <cstring>
#if HAVE_GNUTLS_GNUTLS_H
#include <gnutls/gnutls.h>
#endif
#if HAVE_LIBCRYPTO
#include <openssl/md5.h>
#endif // HAVE_LIBCRYPTO
User::User() {
id = 0;
username[0] = password[0] = 0;
@ -189,11 +180,10 @@ User *zmLoadTokenUser(const std::string &jwt_token_str, bool use_remote_addr) {
// Function to validate an authentication string
User *zmLoadAuthUser(const char *auth, bool use_remote_addr) {
#if HAVE_DECL_MD5 || HAVE_DECL_GNUTLS_FINGERPRINT
const char *remote_addr = "";
if ( use_remote_addr ) {
if (use_remote_addr) {
remote_addr = getenv("REMOTE_ADDR");
if ( !remote_addr ) {
if (!remote_addr) {
Warning("Can't determine remote address, using null");
remote_addr = "";
}
@ -209,7 +199,7 @@ User *zmLoadAuthUser(const char *auth, bool use_remote_addr) {
return nullptr;
int n_users = mysql_num_rows(result);
if ( n_users < 1 ) {
if (n_users < 1) {
mysql_free_result(result);
Warning("Unable to authenticate user");
return nullptr;
@ -218,58 +208,49 @@ User *zmLoadAuthUser(const char *auth, bool use_remote_addr) {
// getting the time is expensive, so only do it once.
time_t now = time(nullptr);
unsigned int hours = config.auth_hash_ttl;
if ( !hours ) {
if (!hours) {
Warning("No value set for ZM_AUTH_HASH_TTL. Defaulting to 2.");
hours = 2;
} else {
Debug(1, "AUTH_HASH_TTL is %d, time is %" PRIi64, hours, static_cast<int64>(now));
}
char auth_key[512] = "";
char auth_md5[32+1] = "";
constexpr size_t md5len = 16;
uint8 md5sum[md5len];
const char * hex = "0123456789abcdef";
while ( MYSQL_ROW dbrow = mysql_fetch_row(result) ) {
char auth_md5[32 + 1] = "";
const char *hex = "0123456789abcdef";
while (MYSQL_ROW dbrow = mysql_fetch_row(result)) {
const char *username = dbrow[1];
const char *password = dbrow[2];
time_t our_now = now;
tm now_tm = {};
for ( unsigned int i = 0; i < hours; i++, our_now -= 3600 ) {
for (unsigned int i = 0; i < hours; i++, our_now -= 3600) {
localtime_r(&our_now, &now_tm);
snprintf(auth_key, sizeof(auth_key)-1, "%s%s%s%s%d%d%d%d",
config.auth_hash_secret,
username,
password,
remote_addr,
now_tm.tm_hour,
now_tm.tm_mday,
now_tm.tm_mon,
now_tm.tm_year);
std::string auth_key = stringtf("%s%s%s%s%d%d%d%d",
config.auth_hash_secret,
username,
password,
remote_addr,
now_tm.tm_hour,
now_tm.tm_mday,
now_tm.tm_mon,
now_tm.tm_year);
#if HAVE_DECL_MD5
MD5((unsigned char *)auth_key, strlen(auth_key), md5sum);
#elif HAVE_DECL_GNUTLS_FINGERPRINT
gnutls_datum_t md5data = {(unsigned char *) auth_key, (unsigned int) strlen(auth_key)};
size_t md5_len_tmp = md5len;
gnutls_fingerprint(GNUTLS_DIG_MD5, &md5data, md5sum, &md5_len_tmp);
assert(md5_len_tmp == md5len);
#endif
unsigned char *md5sum_ptr = md5sum;
zm::crypto::MD5::Digest md5_digest = zm::crypto::MD5::GetDigestOf(auth_key);
unsigned char *md5sum_ptr = md5_digest.data();
char *auth_md5_ptr = auth_md5;
for ( unsigned int j = 0; j < md5len; j++ ) {
*auth_md5_ptr++ = hex[(*md5sum_ptr>>4)&0xf];
*auth_md5_ptr++ = hex[(*md5sum_ptr++)&0xf];
for (size_t j = 0; j < md5_digest.size(); j++) {
*auth_md5_ptr++ = hex[(*md5sum_ptr >> 4) & 0xf];
*auth_md5_ptr++ = hex[(*md5sum_ptr++) & 0xf];
}
*auth_md5_ptr = 0;
Debug(1, "Checking auth_key '%s' -> auth_md5 '%s' == '%s'",
auth_key, auth_md5, auth);
Debug(1, "Checking auth_key '%s' -> auth_md5 '%s' == '%s'", auth_key.c_str(), auth_md5, auth);
if ( !strcmp(auth, auth_md5) ) {
if (!strcmp(auth, auth_md5)) {
// We have a match
User *user = new User(dbrow);
Debug(1, "Authenticated user '%s'", user->getUsername());
@ -281,9 +262,7 @@ User *zmLoadAuthUser(const char *auth, bool use_remote_addr) {
} // end foreach hour
} // end foreach user
mysql_free_result(result);
#else // HAVE_DECL_MD5 || HAVE_DECL_GNUTLS_FINGERPRINT
Error("You need to build with gnutls or openssl to use hash based auth");
#endif // HAVE_DECL_MD5 || HAVE_DECL_GNUTLS_FINGERPRINT
Debug(1, "No user found for auth_key %s", auth);
return nullptr;
} // end User *zmLoadAuthUser( const char *auth, bool use_remote_addr )