263e2fabae
these unused includes were identified by clangd. see https://clangd.llvm.org/guides/include-cleaner#unused-include-warning for more details on the "Unused include" warning. Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
71 lines
1.7 KiB
C++
71 lines
1.7 KiB
C++
/*
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* Copyright (C) 2018-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#include "auth/passwords.hh"
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#include <cerrno>
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extern "C" {
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#include <crypt.h>
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#include <unistd.h>
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}
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namespace auth::passwords {
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static thread_local crypt_data tlcrypt = {};
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namespace detail {
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scheme identify_best_supported_scheme() {
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const auto all_schemes = { scheme::bcrypt_y, scheme::bcrypt_a, scheme::sha_512, scheme::sha_256, scheme::md5 };
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// "Random", for testing schemes.
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const sstring random_part_of_salt = "aaaabbbbccccdddd";
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for (scheme c : all_schemes) {
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const sstring salt = sstring(prefix_for_scheme(c)) + random_part_of_salt;
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const char* e = crypt_r("fisk", salt.c_str(), &tlcrypt);
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if (e && (e[0] != '*')) {
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return c;
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}
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}
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throw no_supported_schemes();
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}
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sstring hash_with_salt(const sstring& pass, const sstring& salt) {
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auto res = crypt_r(pass.c_str(), salt.c_str(), &tlcrypt);
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if (!res || (res[0] == '*')) {
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throw std::system_error(errno, std::system_category());
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}
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return res;
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}
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const char* prefix_for_scheme(scheme c) noexcept {
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switch (c) {
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case scheme::bcrypt_y: return "$2y$";
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case scheme::bcrypt_a: return "$2a$";
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case scheme::sha_512: return "$6$";
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case scheme::sha_256: return "$5$";
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case scheme::md5: return "$1$";
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default: return nullptr;
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}
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}
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} // namespace detail
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no_supported_schemes::no_supported_schemes()
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: std::runtime_error("No allowed hashing schemes are supported on this system") {
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}
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bool check(const sstring& pass, const sstring& salted_hash) {
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return detail::hash_with_salt(pass, salted_hash) == salted_hash;
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}
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} // namespace auth::passwords
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