Atmosphere/libraries/libvapours/include/vapours/crypto/crypto_sha256_generator.hpp

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/*
* Copyright (c) Atmosphère-NX
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*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <vapours/common.hpp>
#include <vapours/assert.hpp>
#include <vapours/util.hpp>
#include <vapours/crypto/impl/crypto_sha256_impl.hpp>
namespace ams::crypto {
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struct Sha256Context {
u32 intermediate_hash[impl::Sha256Impl::HashSize / sizeof(u32)];
u64 bits_consumed;
};
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class Sha256Generator {
NON_COPYABLE(Sha256Generator);
NON_MOVEABLE(Sha256Generator);
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private:
using Impl = impl::Sha256Impl;
public:
static constexpr size_t HashSize = Impl::HashSize;
static constexpr size_t BlockSize = Impl::BlockSize;
static constexpr inline u8 Asn1Identifier[] = {
0x30, 0x31, /* Sequence, size 0x31 */
0x30, 0x0D, /* Sequence, size 0x0D */
0x06, 0x09, /* Object Identifier */
0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, /* SHA-256 */
0x05, 0x00, /* Null */
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0x04, 0x20, /* Octet string, size 0x20 */
};
static constexpr size_t Asn1IdentifierSize = util::size(Asn1Identifier);
private:
Impl m_impl;
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public:
Sha256Generator() { /* ... */ }
void Initialize() {
m_impl.Initialize();
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}
void Update(const void *data, size_t size) {
m_impl.Update(data, size);
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}
void GetHash(void *dst, size_t size) {
m_impl.GetHash(dst, size);
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}
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void InitializeWithContext(const Sha256Context *context) {
m_impl.InitializeWithContext(context);
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}
size_t GetContext(Sha256Context *context) const {
return m_impl.GetContext(context);
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}
size_t GetBufferedDataSize() const {
return m_impl.GetBufferedDataSize();
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}
void GetBufferedData(void *dst, size_t dst_size) const {
return m_impl.GetBufferedData(dst, dst_size);
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}
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};
void GenerateSha256Hash(void *dst, size_t dst_size, const void *src, size_t src_size);
}