fcb8d040e8
Instead of lengthy blurbs, switch to single-line, machine-readable standardized (https://spdx.dev) license identifiers. The Linux kernel switched long ago, so there is strong precedent. Three cases are handled: AGPL-only, Apache-only, and dual licensed. For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0), reasoning that our changes are extensive enough to apply our license. The changes we applied mechanically with a script, except to licenses/README.md. Closes #9937
72 lines
1.7 KiB
C++
72 lines
1.7 KiB
C++
/*
|
|
* Copyright (C) 2018-present ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* SPDX-License-Identifier: AGPL-3.0-or-later
|
|
*/
|
|
|
|
#include "auth/passwords.hh"
|
|
|
|
#include <cerrno>
|
|
#include <optional>
|
|
|
|
extern "C" {
|
|
#include <crypt.h>
|
|
#include <unistd.h>
|
|
}
|
|
|
|
namespace auth::passwords {
|
|
|
|
static thread_local crypt_data tlcrypt = { 0, };
|
|
|
|
namespace detail {
|
|
|
|
scheme identify_best_supported_scheme() {
|
|
const auto all_schemes = { scheme::bcrypt_y, scheme::bcrypt_a, scheme::sha_512, scheme::sha_256, scheme::md5 };
|
|
// "Random", for testing schemes.
|
|
const sstring random_part_of_salt = "aaaabbbbccccdddd";
|
|
|
|
for (scheme c : all_schemes) {
|
|
const sstring salt = sstring(prefix_for_scheme(c)) + random_part_of_salt;
|
|
const char* e = crypt_r("fisk", salt.c_str(), &tlcrypt);
|
|
|
|
if (e && (e[0] != '*')) {
|
|
return c;
|
|
}
|
|
}
|
|
|
|
throw no_supported_schemes();
|
|
}
|
|
|
|
sstring hash_with_salt(const sstring& pass, const sstring& salt) {
|
|
auto res = crypt_r(pass.c_str(), salt.c_str(), &tlcrypt);
|
|
if (!res || (res[0] == '*')) {
|
|
throw std::system_error(errno, std::system_category());
|
|
}
|
|
return res;
|
|
}
|
|
|
|
const char* prefix_for_scheme(scheme c) noexcept {
|
|
switch (c) {
|
|
case scheme::bcrypt_y: return "$2y$";
|
|
case scheme::bcrypt_a: return "$2a$";
|
|
case scheme::sha_512: return "$6$";
|
|
case scheme::sha_256: return "$5$";
|
|
case scheme::md5: return "$1$";
|
|
default: return nullptr;
|
|
}
|
|
}
|
|
|
|
} // namespace detail
|
|
|
|
no_supported_schemes::no_supported_schemes()
|
|
: std::runtime_error("No allowed hashing schemes are supported on this system") {
|
|
}
|
|
|
|
bool check(const sstring& pass, const sstring& salted_hash) {
|
|
return detail::hash_with_salt(pass, salted_hash) == salted_hash;
|
|
}
|
|
|
|
} // namespace auth::paswords
|