mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-11-16 01:49:32 +00:00
116 lines
4.7 KiB
C++
116 lines
4.7 KiB
C++
|
/*
|
||
|
* Copyright (c) Atmosphère-NX
|
||
|
*
|
||
|
* 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/crypto_rsa_calculator.hpp>
|
||
|
#include <vapours/crypto/impl/crypto_rsa_pkcs1_impl.hpp>
|
||
|
|
||
|
namespace ams::crypto {
|
||
|
|
||
|
template<size_t _ModulusSize, impl::HashFunction Hash>
|
||
|
class RsaPkcs1Verifier {
|
||
|
NON_COPYABLE(RsaPkcs1Verifier);
|
||
|
NON_MOVEABLE(RsaPkcs1Verifier);
|
||
|
public:
|
||
|
static constexpr size_t HashSize = Hash::HashSize;
|
||
|
static constexpr size_t ModulusSize = _ModulusSize;
|
||
|
static constexpr size_t SignatureSize = ModulusSize;
|
||
|
static constexpr size_t MaximumExponentSize = 3;
|
||
|
static constexpr size_t RequiredWorkBufferSize = RsaCalculator<ModulusSize, MaximumExponentSize>::RequiredWorkBufferSize;
|
||
|
private:
|
||
|
enum class State {
|
||
|
None,
|
||
|
Initialized,
|
||
|
Done,
|
||
|
};
|
||
|
private:
|
||
|
RsaCalculator<ModulusSize, MaximumExponentSize> m_calculator;
|
||
|
Hash m_hash;
|
||
|
State m_state;
|
||
|
public:
|
||
|
RsaPkcs1Verifier() : m_state(State::None) { /* ... */ }
|
||
|
|
||
|
bool Initialize(const void *mod, size_t mod_size, const void *exp, size_t exp_size) {
|
||
|
m_hash.Initialize();
|
||
|
if (m_calculator.Initialize(mod, mod_size, exp, exp_size)) {
|
||
|
m_state = State::Initialized;
|
||
|
return true;
|
||
|
} else {
|
||
|
return false;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void Update(const void *data, size_t size) {
|
||
|
AMS_ASSERT(m_state == State::Initialized);
|
||
|
return m_hash.Update(data, size);
|
||
|
}
|
||
|
|
||
|
bool Verify(const void *signature, size_t size) {
|
||
|
AMS_ASSERT(m_state == State::Initialized);
|
||
|
AMS_ASSERT(size == SignatureSize);
|
||
|
AMS_UNUSED(size);
|
||
|
ON_SCOPE_EXIT { m_state = State::Done; };
|
||
|
|
||
|
impl::RsaPkcs1Impl<Hash> impl;
|
||
|
u8 message[SignatureSize];
|
||
|
|
||
|
return m_calculator.ExpMod(message, signature, SignatureSize) && impl.CheckPad(message, sizeof(message), std::addressof(m_hash));
|
||
|
}
|
||
|
|
||
|
bool Verify(const void *signature, size_t size, void *work_buf, size_t work_buf_size) {
|
||
|
AMS_ASSERT(m_state == State::Initialized);
|
||
|
AMS_ASSERT(size == SignatureSize);
|
||
|
AMS_UNUSED(size);
|
||
|
ON_SCOPE_EXIT { m_state = State::Done; };
|
||
|
|
||
|
impl::RsaPkcs1Impl<Hash> impl;
|
||
|
u8 message[SignatureSize];
|
||
|
|
||
|
return m_calculator.ExpMod(message, signature, SignatureSize, work_buf, work_buf_size) && impl.CheckPad(message, sizeof(message), std::addressof(m_hash));
|
||
|
}
|
||
|
|
||
|
void GetHash(void *dst, size_t dst_size) {
|
||
|
AMS_ASSERT(m_state == State::Done);
|
||
|
|
||
|
if (m_state == State::Done) {
|
||
|
m_hash.GetHash(dst, dst_size);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static bool Verify(const void *sig, size_t sig_size, const void *mod, size_t mod_size, const void *exp, size_t exp_size, const void *msg, size_t msg_size) {
|
||
|
RsaPkcs1Verifier<ModulusSize, Hash> verifier;
|
||
|
if (!verifier.Initialize(mod, mod_size, exp, exp_size)) {
|
||
|
return false;
|
||
|
}
|
||
|
verifier.Update(msg, msg_size);
|
||
|
return verifier.Verify(sig, sig_size);
|
||
|
}
|
||
|
|
||
|
static bool Verify(const void *sig, size_t sig_size, const void *mod, size_t mod_size, const void *exp, size_t exp_size, const void *msg, size_t msg_size, void *work_buf, size_t work_buf_size) {
|
||
|
RsaPkcs1Verifier<ModulusSize, Hash> verifier;
|
||
|
if (!verifier.Initialize(mod, mod_size, exp, exp_size)) {
|
||
|
return false;
|
||
|
}
|
||
|
verifier.Update(msg, msg_size);
|
||
|
return verifier.Verify(sig, sig_size, work_buf, work_buf_size);
|
||
|
}
|
||
|
};
|
||
|
|
||
|
}
|