platform/services/datalake/pod-datalake/src/hash.ts

//
// Copyright © 2025 Hardcore Engineering Inc.
//
// Licensed under the Eclipse Public 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.eclipse.org/legal/epl-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.
//

import crypto from 'node:crypto'
import { ReadStream } from 'fs'

export async function getBufferSha256 (buffer: Buffer): Promise<string> {
  const hash = crypto.createHash('sha256')
  hash.write(buffer)
  return hash.digest('hex')
}

export async function getStreamSha256 (stream: ReadStream): Promise<string> {
  const hasher = crypto.createHash('sha256')
  stream.pipe(hasher)

  await new Promise<void>((resolve, reject) => {
    stream.on('error', (err) => {
      reject(err)
    })
    stream.on('end', () => {
      resolve()
    })
  })

  return hasher.digest('hex')
}