mirror of
https://github.com/RGBCube/serenity
synced 2025-05-16 19:15:07 +00:00
6e19ab2bbc
We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
/*
|
|
* Copyright (c) 2020, Peter Elliott <pelliott@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/Base64.h>
|
|
#include <AK/Types.h>
|
|
#include <LibCrypto/Hash/SHA2.h>
|
|
#include <crypt.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
|
|
extern "C" {
|
|
|
|
static struct crypt_data crypt_data;
|
|
|
|
char* crypt(char const* key, char const* salt)
|
|
{
|
|
crypt_data.initialized = true;
|
|
return crypt_r(key, salt, &crypt_data);
|
|
}
|
|
|
|
static constexpr size_t crypt_salt_max = 16;
|
|
|
|
char* crypt_r(char const* key, char const* salt, struct crypt_data* data)
|
|
{
|
|
if (!data->initialized) {
|
|
errno = EINVAL;
|
|
return nullptr;
|
|
}
|
|
|
|
// We only support SHA-256 at the moment
|
|
if (salt[0] != '$' || salt[1] != '5') {
|
|
errno = EINVAL;
|
|
return nullptr;
|
|
}
|
|
|
|
char const* salt_value = salt + 3;
|
|
size_t salt_len = min(strcspn(salt_value, "$"), crypt_salt_max);
|
|
size_t header_len = salt_len + 3;
|
|
|
|
bool fits = DeprecatedString(salt, header_len).copy_characters_to_buffer(data->result, sizeof(data->result));
|
|
if (!fits) {
|
|
errno = EINVAL;
|
|
return nullptr;
|
|
}
|
|
data->result[header_len] = '$';
|
|
|
|
Crypto::Hash::SHA256 sha;
|
|
sha.update(StringView { key, strlen(key) });
|
|
sha.update(reinterpret_cast<u8 const*>(salt_value), salt_len);
|
|
|
|
auto digest = sha.digest();
|
|
auto string = encode_base64(ReadonlyBytes(digest.immutable_data(), digest.data_length()));
|
|
|
|
fits = string.copy_characters_to_buffer(data->result + header_len + 1, sizeof(data->result) - header_len - 1);
|
|
if (!fits) {
|
|
errno = EINVAL;
|
|
return nullptr;
|
|
}
|
|
|
|
return data->result;
|
|
}
|
|
}
|