f3eade2f62
Drop the AGPL license in favor of a source-available license. See the blog post [1] for details. [1] https://www.scylladb.com/2024/12/18/why-were-moving-to-a-source-available-license/
70 lines
1.7 KiB
C++
70 lines
1.7 KiB
C++
/*
|
|
* Copyright (C) 2018-present ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* SPDX-License-Identifier: LicenseRef-ScyllaDB-Source-Available-1.0
|
|
*/
|
|
|
|
#include "auth/passwords.hh"
|
|
|
|
#include <cerrno>
|
|
|
|
extern "C" {
|
|
#include <crypt.h>
|
|
#include <unistd.h>
|
|
}
|
|
|
|
namespace auth::passwords {
|
|
|
|
static thread_local crypt_data tlcrypt = {};
|
|
|
|
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;
|
|
}
|
|
|
|
std::string_view 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 "$1$";
|
|
}
|
|
}
|
|
|
|
} // 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::passwords
|