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// Copyright 2021 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
#define PW_LOG_MODULE_NAME "SHA256-MTLS"
#define PW_LOG_LEVEL PW_LOG_LEVEL_WARN
#include "pw_crypto/sha256.h"
#include "pw_status/status.h"
namespace pw::crypto::sha256::backend {
Status DoInit(NativeSha256Context& ctx) {
// mbedtsl_sha256_init() never fails (returns void).
mbedtls_sha256_init(&ctx);
if (mbedtls_sha256_starts_ret(&ctx, /* is224 = */ 0)) {
return Status::Internal();
}
return OkStatus();
}
Status DoUpdate(NativeSha256Context& ctx, ConstByteSpan data) {
if (mbedtls_sha256_update_ret(
&ctx,
reinterpret_cast<const unsigned char*>(data.data()),
data.size())) {
return Status::Internal();
}
return OkStatus();
}
Status DoFinal(NativeSha256Context& ctx, ByteSpan out_digest) {
if (mbedtls_sha256_finish_ret(
&ctx, reinterpret_cast<unsigned char*>(out_digest.data()))) {
return Status::Internal();
}
return OkStatus();
}
} // namespace pw::crypto::sha256::backend
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