UtilHasher.scala
055597fb6591riccardo

UtilHasher.scala
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			package net.shrine.crypto2

			import java.security.MessageDigest
			import java.security.cert.X509Certificate

			import net.shrine.spray.ShaResponse


			/**
			* Created by ty on 10/18/16.
			*/
			case class UtilHasher(certCollection: BouncyKeyStoreCollection) {

			def containsCertWithSig(sha256: String):Option[X509Certificate] = {
			val typedNone:Option[X509Certificate] = None
			certCollection.allEntries.map(_.cert).foldLeft(typedNone)((acc, cur) => matchSig(acc, cur, sha256))
			}

			private def matchSig(maybeCert: Option[X509Certificate], cert:X509Certificate, sha256:String): Option[X509Certificate] = {
			if (maybeCert.isDefined)
			maybeCert
			else if (UtilHasher.encodeCert(cert, "SHA-256").toLowerCase == sha256.toLowerCase)
			Some(cert)
			else
			None
			}

			def validSignatureFormat(sha256: String): Boolean = {
			sha256.matches("([A-F,0-9]{2}:){31}[A-F,0-9]{2}")
			}

			def handleSig(sha256:String): ShaResponse = {
			val mySha = UtilHasher.encodeCert(certCollection.myEntry.cert, "SHA-256")
			if (validSignatureFormat(sha256)) {
			containsCertWithSig(sha256).fold(ShaResponse(mySha, found = false): ShaResponse)(_ => ShaResponse(mySha, found = true))
			} else {
			ShaResponse(ShaResponse.badFormat, found = false)
			}
			}
			}

			object UtilHasher {

			def encodeCert(cert: X509Certificate, hasher: String): String = {
			val encoding = MessageDigest.getInstance(hasher)
			def toHex(buf: Array[Byte]): String = buf.map("%02X".format(_)).mkString(":")

			toHex(encoding.digest(cert.getEncoded))
			}
			}