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crypto: implement RSA-2048-PSS

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This commit is contained in:
Michael Scire 2020-02-23 17:34:30 -08:00
parent d675aa3414
commit f3629f863d
13 changed files with 692 additions and 3 deletions
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3
libraries/libvapours/include/vapours/crypto.hpp
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@ -19,4 +19,5 @@
#include <vapours/crypto/crypto_memory_compare.hpp>
#include <vapours/crypto/crypto_memory_clear.hpp>
#include <vapours/crypto/impl/crypto_bignum.hpp>
#include <vapours/crypto/crypto_sha256_generator.hpp>
#include <vapours/crypto/crypto_rsa_pss_sha256_verifier.hpp>

60
libraries/libvapours/include/vapours/crypto/crypto_rsa_calculator.hpp Normal file
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@ -0,0 +1,60 @@
/*
* Copyright (c) 2018-2020 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/impl/crypto_bignum.hpp>
namespace ams::crypto {
template<size_t ModulusSize, size_t ExponentSize>
class RsaCalculator {
NON_COPYABLE(RsaCalculator);
NON_MOVEABLE(RsaCalculator);
public:
static constexpr inline size_t RequiredWorkBufferSize = 0x10 * ModulusSize;
private:
impl::StaticBigNum<ModulusSize * BITSIZEOF(u8)> modulus;
impl::StaticBigNum<ExponentSize * BITSIZEOF(u8)> exponent;
public:
RsaCalculator() { /* ... */ }
~RsaCalculator() { this->exponent.ClearToZero(); }
bool Initialize(const void *mod, size_t mod_size, const void *exp, size_t exp_size) {
if (!this->modulus.Import(mod, mod_size) || this->modulus.IsZero()) {
return false;
}
if (!this->exponent.Import(exp, exp_size) || this->exponent.IsZero()) {
return false;
}
return true;
}
bool ExpMod(void *dst, const void *src, size_t size, void *work_buf, size_t work_buf_size) {
AMS_ASSERT(work_buf_size >= RequiredWorkBufferSize);
return this->modulus.ExpMod(dst, src, size, this->exponent, static_cast<u32 *>(work_buf), work_buf_size);
}
bool ExpMod(void *dst, const void *src, size_t size) {
u32 work_buf[RequiredWorkBufferSize / sizeof(u32)];
return this->ExpMod(dst, src, size, work_buf, sizeof(work_buf));
}
};
}

53
libraries/libvapours/include/vapours/crypto/crypto_rsa_pss_sha256_verifier.hpp Normal file
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@ -0,0 +1,53 @@
/*
* Copyright (c) 2018-2020 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/crypto_rsa_pss_verifier.hpp>
#include <vapours/crypto/crypto_sha256_generator.hpp>
namespace ams::crypto {
namespace impl {
template<size_t Bits>
using RsaNPssSha256Verifier = ::ams::crypto::RsaPssVerifier<Bits / BITSIZEOF(u8), ::ams::crypto::Sha256Generator>;
}
using Rsa2048PssSha256Verifier = ::ams::crypto::impl::RsaNPssSha256Verifier<2048>;
using Rsa4096PssSha256Verifier = ::ams::crypto::impl::RsaNPssSha256Verifier<4096>;
inline bool VerifyRsa2048PssSha256(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) {
return Rsa2048PssSha256Verifier::Verify(sig, sig_size, mod, mod_size, exp, exp_size, msg, msg_size);
}
inline bool VerifyRsa2048PssSha256(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) {
return Rsa2048PssSha256Verifier::Verify(sig, sig_size, mod, mod_size, exp, exp_size, msg, msg_size, work_buf, work_buf_size);
}
inline bool VerifyRsa4096PssSha256(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) {
return Rsa4096PssSha256Verifier::Verify(sig, sig_size, mod, mod_size, exp, exp_size, msg, msg_size);
}
inline bool VerifyRsa4096PssSha256(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) {
return Rsa4096PssSha256Verifier::Verify(sig, sig_size, mod, mod_size, exp, exp_size, msg, msg_size, work_buf, work_buf_size);
}
}

109
libraries/libvapours/include/vapours/crypto/crypto_rsa_pss_verifier.hpp Normal file
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@ -0,0 +1,109 @@
/*
* Copyright (c) 2018-2020 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_pss_impl.hpp>
namespace ams::crypto {
template<size_t ModulusSize, typename Hash> /* requires HashFunction<Hash> */
class RsaPssVerifier {
NON_COPYABLE(RsaPssVerifier);
NON_MOVEABLE(RsaPssVerifier);
public:
static constexpr size_t HashSize = Hash::HashSize;
static constexpr size_t SaltSize = Hash::HashSize;
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> calculator;
Hash hash;
State state;
public:
RsaPssVerifier() : state(State::None) { /* ... */ }
~RsaPssVerifier() { }
bool Initialize(const void *mod, size_t mod_size, const void *exp, size_t exp_size) {
this->hash.Initialize();
if (this->calculator.Initialize(mod, mod_size, exp, exp_size)) {
this->state = State::Initialized;
return true;
} else {
return false;
}
}
void Update(const void *data, size_t size) {
return this->hash.Update(data, size);
}
bool Verify(const void *signature, size_t size) {
AMS_ASSERT(this->state == State::Initialized);
AMS_ASSERT(size == SignatureSize);
ON_SCOPE_EXIT { this->state = State::Done; };
impl::RsaPssImpl<Hash> impl;
u8 message[SignatureSize];
ON_SCOPE_EXIT { ClearMemory(message, sizeof(message)); };
return this->calculator.ExpMod(message, signature, SignatureSize) &&
impl.Verify(message, sizeof(message), std::addressof(this->hash));
}
bool Verify(const void *signature, size_t size, void *work_buf, size_t work_buf_size) {
AMS_ASSERT(this->state == State::Initialized);
AMS_ASSERT(size == SignatureSize);
ON_SCOPE_EXIT { this->state = State::Done; };
impl::RsaPssImpl<Hash> impl;
u8 message[SignatureSize];
ON_SCOPE_EXIT { ClearMemory(message, sizeof(message)); };
return this->calculator.ExpMod(message, signature, SignatureSize, work_buf, work_buf_size) &&
impl.Verify(message, sizeof(message), std::addressof(this->hash));
}
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) {
RsaPssVerifier<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) {
RsaPssVerifier<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);
}
};
}

61
libraries/libvapours/include/vapours/crypto/crypto_sha256_generator.hpp Normal file
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@ -0,0 +1,61 @@
/*
* Copyright (c) 2018-2020 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/impl/crypto_sha256_impl.hpp>
namespace ams::crypto {
class Sha256Generator {
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 */
0x00, /* Null */
0x04, 0x20, /* Octet string, size 0x20 */
};
static constexpr size_t Asn1IdentifierSize = util::size(Asn1Identifier);
private:
Impl impl;
public:
Sha256Generator() { /* ... */ }
void Initialize() {
this->impl.Initialize();
}
void Update(const void *data, size_t size) {
this->impl.Update(data, size);
}
void GetHash(void *dst, size_t size) {
this->impl.GetHash(dst, size);
}
};
void GenerateSha256Hash(void *dst, size_t dst_size, const void *src, size_t src_size);
}

4
libraries/libvapours/include/vapours/crypto/impl/crypto_bignum.hpp
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@ -147,7 +147,7 @@ namespace ams::crypto::impl {
};
template<size_t Bits>
class StackBigNum : public BigNum {
class StaticBigNum : public BigNum {
public:
static constexpr size_t NumBits = Bits;
static constexpr size_t NumWords = util::AlignUp(NumBits, BitsPerWord) / BitsPerWord;
@ -155,7 +155,7 @@ namespace ams::crypto::impl {
private:
Word word_buf[NumWords];
public:
constexpr StackBigNum() : word_buf() {
constexpr StaticBigNum() : word_buf() {
this->ReserveStatic(word_buf, NumWords);
}
};

37
libraries/libvapours/include/vapours/crypto/impl/crypto_hash_function.hpp Normal file
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@ -0,0 +1,37 @@
/*
* Copyright (c) 2018-2020 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_memory_compare.hpp>
#include <vapours/crypto/crypto_memory_clear.hpp>
namespace ams::crypto::impl {
/* TODO: C++20
template<typename T>
concept HashFunction = requires(T &t, const void *cv, void *v, size_t sz) {
{ T::HashSize } -> std::same_as<size_t>;
{ T::BlockSize } -> std::same_as<size_t>;
{ t.Initialize() } -> std::same_as<void>;
{ t.Update(cv, sz) } -> std::same_as<void>;
{ t.GetHash(v, sz) } -> std::same_as<void>;
};
*/
}

120
libraries/libvapours/include/vapours/crypto/impl/crypto_rsa_pss_impl.hpp Normal file
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@ -0,0 +1,120 @@
/*
* Copyright (c) 2018-2020 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/impl/crypto_hash_function.hpp>
namespace ams::crypto::impl {
template<typename Hash> /* requires HashFunction<Hash> */
class RsaPssImpl {
NON_COPYABLE(RsaPssImpl);
NON_MOVEABLE(RsaPssImpl);
public:
static constexpr size_t HashSize = Hash::HashSize;
private:
static constexpr u8 TailMagic = 0xBC;
private:
static void ComputeHashWithPadding(void *dst, Hash *hash, const void *salt, size_t salt_size) {
/* Initialize our buffer. */
u8 buf[8 + HashSize];
std::memset(buf, 0, 8);
hash->GetHash(buf + 8, HashSize);
ON_SCOPE_EXIT { ClearMemory(buf, sizeof(buf)); };
/* Calculate our hash. */
hash->Initialize();
hash->Update(buf, sizeof(buf));
hash->Update(salt, salt_size);
hash->GetHash(dst, HashSize);
}
static void ApplyMGF1(u8 *dst, size_t dst_size, const void *src, size_t src_size) {
u8 buf[HashSize];
ON_SCOPE_EXIT { ClearMemory(buf, sizeof(buf)); };
const size_t required_iters = (dst_size + HashSize - 1) / HashSize;
for (size_t i = 0; i < required_iters; i++) {
Hash hash;
hash.Initialize();
hash.Update(src, src_size);
const u32 tmp = util::ConvertToBigEndian(static_cast<u32>(i));
hash.Update(std::addressof(tmp), sizeof(tmp));
hash.GetHash(buf, HashSize);
const size_t start = HashSize * i;
const size_t end = std::min(dst_size, start + HashSize);
for (size_t j = start; j < end; j++) {
dst[j] ^= buf[j - start];
}
}
}
public:
RsaPssImpl() { /* ... */ }
bool Verify(u8 *buf, size_t size, Hash *hash) {
/* Validate sanity byte. */
if (buf[size - 1] != TailMagic) {
return false;
}
/* Decrypt maskedDB */
const size_t db_len = size - HashSize - 1;
u8 *db = buf;
u8 *h = db + db_len;
ApplyMGF1(db, db_len, h, HashSize);
/* Apply lmask. */
db[0] &= 0x7F;
/* Verify that DB is of the form 0000...0001 */
s32 salt_ofs = -1;
for (size_t i = 0; i < db_len; i++) {
if (db[i] != 0) {
salt_ofs = static_cast<s32>(i) + 1;
break;
}
}
if (salt_ofs == -1) {
return false;
}
if (db[salt_ofs - 1] != 1) {
return false;
}
/* Verify salt. */
const u8 *salt = db + salt_ofs;
const size_t salt_size = db_len - salt_ofs;
if (salt_size == 0) {
return false;
}
/* Verify hash. */
u8 cmp_hash[HashSize];
ON_SCOPE_EXIT { ClearMemory(cmp_hash, sizeof(cmp_hash)); };
ComputeHashWithPadding(cmp_hash, hash, salt, salt_size);
return IsSameBytes(cmp_hash, h, HashSize);
}
};
}

54
libraries/libvapours/include/vapours/crypto/impl/crypto_sha256_impl.hpp Normal file
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@ -0,0 +1,54 @@
/*
* Copyright (c) 2018-2020 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/impl/crypto_hash_function.hpp>
#include <vapours/crypto/crypto_memory_clear.hpp>
namespace ams::crypto::impl {
class Sha256Impl {
public:
static constexpr size_t HashSize = 0x20;
static constexpr size_t BlockSize = 0x40;
private:
struct State {
u32 intermediate_hash[HashSize / sizeof(u32)];
u8 buffer[BlockSize];
u64 bits_consumed;
size_t num_buffered;
bool finalized;
};
private:
State state;
public:
Sha256Impl() { /* ... */ }
~Sha256Impl() {
static_assert(std::is_trivially_destructible<State>::value);
ClearMemory(std::addressof(this->state), sizeof(this->state));
}
void Initialize();
void Update(const void *data, size_t size);
void GetHash(void *dst, size_t size);
};
/* static_assert(HashFunction<Sha256Impl>); */
}

1
libraries/libvapours/include/vapours/util.hpp
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@ -20,6 +20,7 @@
#include <vapours/util/util_alignment.hpp>
#include <vapours/util/util_size.hpp>
#include <vapours/util/util_endian.hpp>
#include <vapours/util/util_fourcc.hpp>
#include <vapours/util/util_bitpack.hpp>
#include <vapours/util/util_bitset.hpp>

121
libraries/libvapours/include/vapours/util/util_endian.hpp Normal file
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@ -0,0 +1,121 @@
/*
* Copyright (c) 2018-2020 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>
namespace ams::util {
/* TODO: C++20 std::endian */
constexpr bool IsLittleEndian() {
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
return true;
#else
return false;
#endif
}
constexpr bool IsBigEndian() {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
return true;
#else
return false;
#endif
}
static_assert(IsLittleEndian() ^ IsBigEndian());
template<typename U> /* requires unsigned_integral<U> */
constexpr ALWAYS_INLINE U SwapBytes(const U u) {
static_assert(BITSIZEOF(u8) == 8);
constexpr U ByteMask = 0xFFu;
if constexpr (std::is_same<U, u64>::value) {
return ((u & (ByteMask << 56)) >> 56) |
((u & (ByteMask << 48)) >> 40) |
((u & (ByteMask << 40)) >> 24) |
((u & (ByteMask << 32)) >> 8) |
((u & (ByteMask << 24)) << 8) |
((u & (ByteMask << 16)) << 24) |
((u & (ByteMask << 8)) << 40) |
((u & (ByteMask << 0)) << 56);
} else if constexpr (std::is_same<U, u32>::value) {
return ((u & (ByteMask << 24)) >> 24) |
((u & (ByteMask << 16)) >> 8) |
((u & (ByteMask << 8)) << 8) |
((u & (ByteMask << 0)) << 24);
} else if constexpr (std::is_same<U, u16>::value) {
return ((u & (ByteMask << 8)) >> 8) |
((u & (ByteMask << 0)) << 8);
} else if constexpr (std::is_same<U, u8>::value) {
return u;
} else {
static_assert(!std::is_same<U, U>::value);
}
}
template<typename T> /* requires integral<T> */
constexpr ALWAYS_INLINE void SwapBytes(T *ptr) {
using U = typename std::make_unsigned<T>::type;
*ptr = static_cast<T>(SwapBytes(static_cast<U>(*ptr)));
}
template<typename T>
constexpr ALWAYS_INLINE T ConvertToBigEndian(const T val) {
if constexpr (IsBigEndian()) {
return val;
} else {
static_assert(IsLittleEndian());
return SwapBytes(val);
}
}
template<typename T>
constexpr ALWAYS_INLINE T ConvertToLittleEndian(const T val) {
if constexpr (IsBigEndian()) {
return SwapBytes(val);
} else {
static_assert(IsLittleEndian());
return val;
}
}
template<typename T> /* requires integral<T> */
constexpr ALWAYS_INLINE T LoadBigEndian(T *ptr) {
return ConvertToBigEndian(*ptr);
}
template<typename T> /* requires integral<T> */
constexpr ALWAYS_INLINE T LoadLittleEndian(T *ptr) {
return ConvertToLittleEndian(*ptr);
}
template<typename T>
constexpr ALWAYS_INLINE void StoreBigEndian(T *ptr, T val) {
*ptr = ConvertToBigEndian(val);
}
template<typename T>
constexpr ALWAYS_INLINE void StoreLittleEndian(T *ptr, T val) {
*ptr = ConvertToLittleEndian(val);
}
}

28
libraries/libvapours/source/crypto/crypto_sha256_generator.cpp Normal file
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@ -0,0 +1,28 @@
/*
* Copyright (c) 2018-2020 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/>.
*/
#include <vapours.hpp>
namespace ams::crypto {
void GenerateSha256Hash(void *dst, size_t dst_size, const void *src, size_t src_size) {
Sha256Generator gen;
gen.Initialize();
gen.Update(src, src_size);
gen.GetHash(dst, dst_size);
}
}

44
libraries/libvapours/source/crypto/impl/crypto_sha256_impl.arch.arm64.cpp Normal file
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@ -0,0 +1,44 @@
/*
* Copyright (c) 2018-2020 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/>.
*/
#include <vapours.hpp>
namespace ams::crypto::impl {
#ifdef ATMOSPHERE_IS_STRATOSPHERE
void Sha256Impl::Initialize() {
static_assert(sizeof(this->state) == sizeof(::Sha256Context));
::sha256ContextCreate(reinterpret_cast<::Sha256Context *>(std::addressof(this->state)));
}
void Sha256Impl::Update(const void *data, size_t size) {
static_assert(sizeof(this->state) == sizeof(::Sha256Context));
::sha256ContextUpdate(reinterpret_cast<::Sha256Context *>(std::addressof(this->state)), data, size);
}
void Sha256Impl::GetHash(void *dst, size_t size) {
static_assert(sizeof(this->state) == sizeof(::Sha256Context));
AMS_ASSERT(size >= HashSize);
::sha256ContextGetHash(reinterpret_cast<::Sha256Context *>(std::addressof(this->state)), dst);
}
#else
/* TODO: Non-EL0 implementation. */
#endif
}