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• HMAC.scala

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io.github.paoloboni.encryption.HMAC.scala Maven / Gradle / Ivy

/*
 * Copyright (c) 2021 Paolo Boni
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package io.github.paoloboni.encryption

import javax.crypto.Mac
import javax.crypto.spec.SecretKeySpec

object HMAC {

  def sha256(sharedSecret: String, preHashString: String): String = {
    val secret = new SecretKeySpec(sharedSecret.getBytes, "HmacSHA256")
    val mac    = Mac.getInstance("HmacSHA256")
    mac.init(secret)
    val hashString = mac.doFinal(preHashString.getBytes)
    new String(hashString.map("%02x".format(_)).mkString)
  }

}