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crypto: add Sha256Context

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This commit is contained in:
Michael Scire
2020-03-11 03:26:55 -07:00
parent 45f8343659
commit 70367e3e7c
3 changed files with 59 additions and 0 deletions
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21
libraries/libvapours/source/crypto/impl/crypto_sha256_impl.arch.arm64.cpp
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@@ -35,6 +35,27 @@ namespace ams::crypto::impl {
::sha256ContextGetHash(reinterpret_cast<::Sha256Context *>(std::addressof(this->state)), dst);
}
void Sha256Impl::InitializeWithContext(const Sha256Context *context) {
static_assert(sizeof(this->state) == sizeof(::Sha256Context));
/* Copy state in from the context. */
std::memcpy(this->state.intermediate_hash, context->intermediate_hash, sizeof(this->state.intermediate_hash));
this->state.bits_consumed = context->bits_consumed;
/* Clear the rest of state. */
std::memset(this->state.buffer, 0, sizeof(this->state.buffer));
this->state.num_buffered = 0;
this->state.finalized = false;
}
size_t Sha256Impl::GetContext(Sha256Context *context) const {
static_assert(sizeof(this->state) == sizeof(::Sha256Context));
std::memcpy(context->intermediate_hash, this->state.intermediate_hash, sizeof(context->intermediate_hash));
context->bits_consumed = this->state.bits_consumed;
return this->state.num_buffered;
}
#else
/* TODO: Non-EL0 implementation. */