mirror of
https://github.com/LadybirdBrowser/ladybird.git
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5e1499d104
This commit un-deprecates DeprecatedString, and repurposes it as a byte
string.
As the null state has already been removed, there are no other
particularly hairy blockers in repurposing this type as a byte string
(what it _really_ is).
This commit is auto-generated:
$ xs=$(ack -l \bDeprecatedString\b\|deprecated_string AK Userland \
Meta Ports Ladybird Tests Kernel)
$ perl -pie 's/\bDeprecatedString\b/ByteString/g;
s/deprecated_string/byte_string/g' $xs
$ clang-format --style=file -i \
$(git diff --name-only | grep \.cpp\|\.h)
$ gn format $(git ls-files '*.gn' '*.gni')
71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
/*
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* Copyright (c) 2020, Peter Elliott <pelliott@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Base64.h>
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#include <AK/Types.h>
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#include <LibCrypto/Hash/SHA2.h>
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#include <crypt.h>
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#include <errno.h>
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#include <string.h>
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extern "C" {
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static struct crypt_data crypt_data;
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char* crypt(char const* key, char const* salt)
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{
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crypt_data.initialized = true;
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return crypt_r(key, salt, &crypt_data);
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}
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static constexpr size_t crypt_salt_max = 16;
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char* crypt_r(char const* key, char const* salt, struct crypt_data* data)
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{
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if (!data->initialized) {
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errno = EINVAL;
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return nullptr;
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}
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// We only support SHA-256 at the moment
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if (salt[0] != '$' || salt[1] != '5') {
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errno = EINVAL;
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return nullptr;
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}
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char const* salt_value = salt + 3;
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size_t salt_len = min(strcspn(salt_value, "$"), crypt_salt_max);
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size_t header_len = salt_len + 3;
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bool fits = ByteString(salt, header_len).copy_characters_to_buffer(data->result, sizeof(data->result));
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if (!fits) {
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errno = EINVAL;
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return nullptr;
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}
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data->result[header_len] = '$';
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Crypto::Hash::SHA256 sha;
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sha.update(StringView { key, strlen(key) });
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sha.update(reinterpret_cast<u8 const*>(salt_value), salt_len);
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auto digest = sha.digest();
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auto string_or_error = encode_base64({ digest.immutable_data(), digest.data_length() });
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if (string_or_error.is_error()) {
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errno = ENOMEM;
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return nullptr;
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}
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auto string = string_or_error.value().bytes_as_string_view();
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fits = string.copy_characters_to_buffer(data->result + header_len + 1, sizeof(data->result) - header_len - 1);
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if (!fits) {
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errno = EINVAL;
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return nullptr;
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}
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return data->result;
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}
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}
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