Scala Longs类代码示例

//设置package包名称以及导入依赖的类
package org.ergoplatform.modifiers.mempool.proposition

import com.google.common.primitives.Longs
import io.circe.Json
import io.circe.syntax._
import org.ergoplatform.settings.Algos
import scorex.core.serialization.{JsonSerializable, Serializer}
import scorex.core.transaction.box.Box
import scorex.crypto.encode.Base58

import scala.util.Try

case class AnyoneCanSpendNoncedBox(override val proposition: AnyoneCanSpendProposition,
                                   nonce: Long,
                                   override val value: Long
                                  ) extends Box[AnyoneCanSpendProposition] with JsonSerializable {

  override lazy val json: Json = Map(
    "id" -> Base58.encode(id).asJson,
    "nonce" -> nonce.asJson,
    "value" -> value.asJson
  ).asJson

  override val id: Array[Byte] = Algos.hash(Longs.toByteArray(nonce))

  override type M = AnyoneCanSpendNoncedBox

  override lazy val serializer: Serializer[AnyoneCanSpendNoncedBox] = AnyoneCanSpendNoncedBoxSerializer
}

object AnyoneCanSpendNoncedBox {
  def idFromBox(prop: AnyoneCanSpendProposition, nonce: Long): Array[Byte] =
    Algos.hash(prop.serializer.toBytes(prop) ++ Longs.toByteArray(nonce))
}

object AnyoneCanSpendNoncedBoxSerializer extends Serializer[AnyoneCanSpendNoncedBox] {
  val Length: Int = AnyoneCanSpendPropositionSerializer.Length + 8 + 8

  override def toBytes(obj: AnyoneCanSpendNoncedBox): Array[Byte] =
    obj.proposition.serializer.toBytes(obj.proposition) ++
      Longs.toByteArray(obj.nonce) ++
      Longs.toByteArray(obj.value)

  override def parseBytes(bytes: Array[Byte]): Try[AnyoneCanSpendNoncedBox] = Try {
    val proposition = AnyoneCanSpendPropositionSerializer.parseBytes(bytes.take(1)).get
    val nonce = Longs.fromByteArray(bytes.slice(1, 9))
    val value = Longs.fromByteArray(bytes.slice(9, 17))
    AnyoneCanSpendNoncedBox(proposition, nonce, value)
  }
} 

//设置package包名称以及导入依赖的类
package im.actor.server.persist

import java.security.MessageDigest

import com.google.common.primitives.Longs
import com.google.protobuf.ByteString
import im.actor.server.db.ActorPostgresDriver.api._
import im.actor.server.model.MasterKey

import scala.concurrent.ExecutionContext

final class MasterKeyTable(tag: Tag) extends Table[MasterKey](tag, "master_keys") {
  def authId = column[Long]("auth_id", O.PrimaryKey)

  def body = column[ByteString]("body")

  def * = (authId, body) <> ((MasterKey.apply _).tupled, MasterKey.unapply)
}

object MasterKeyRepo {
  val masterKeys = TableQuery[MasterKeyTable]

  val byIdC = Compiled { id: Rep[Long] ?
    masterKeys filter (_.authId === id)
  }

  def create(body: Array[Byte])(implicit ec: ExecutionContext) = {
    val md = MessageDigest.getInstance("SHA-256")
    val authId = Longs.fromByteArray(md.digest(body).take(java.lang.Long.BYTES))
    val masterKey = MasterKey(authId, ByteString.copyFrom(body))
    (masterKeys += masterKey) map (_ ? masterKey)
  }

  def find(authId: Long) = byIdC(authId).result.headOption
} 

//设置package包名称以及导入依赖的类
package scorex.perma.consensus

import com.google.common.primitives.{Ints, Longs}
import io.circe.Json
import io.circe.syntax._
import scorex.crypto.encode.Base58
import scorex.serialization.{BytesParseable, BytesSerializable, JsonSerializable}
import scorex.transaction.proof.Signature25519

import scala.util.Try

case class PartialProof(signature: Signature25519, segmentIndex: Long, segment: PermaAuthData) extends JsonSerializable
with BytesSerializable {
  lazy val json: Json = Map(
    "signature" -> Base58.encode(signature.signature).asJson,
    "segmentIndex" -> segmentIndex.asJson,
    "segment" -> segment.json
  ).asJson

  override def bytes: Array[Byte] = {
    Longs.toByteArray(segmentIndex) ++ arrayWithSize(signature.signature) ++ segment.bytes
  }
}

object PartialProof extends BytesParseable[PartialProof] {
  override def parseBytes(bytes: Array[Byte]): Try[PartialProof] = Try {
    val i = Longs.fromByteArray(bytes.slice(0, 8))
    val sigSize = Ints.fromByteArray(bytes.slice(8, 12))
    val sig = Signature25519(bytes.slice(12, 12 + sigSize))
    val segment = PermaAuthData.parseBytes(bytes.slice(12 + sigSize, bytes.length)).get
    PartialProof(sig, i, segment)
  }
} 

//设置package包名称以及导入依赖的类
package helpers

import java.security.MessageDigest
import com.google.common.primitives.Longs

object PasswordHash {
  def generate(password: String, salt: Long, stretchCount: Int = 1): Long = {
    val md = createSha1Encoder
    for (_ <- 1 to stretchCount) {
      md.update(Longs.toByteArray(salt));
      md.update(password.getBytes("utf-8"))
    }
    Longs.fromByteArray(md.digest())
  }

  def createSha1Encoder = MessageDigest.getInstance("SHA-1")
} 

//设置package包名称以及导入依赖的类
package helpers

import java.security.SecureRandom
import scala.util.Random
import javax.inject._
import java.security.MessageDigest
import com.google.common.primitives.Longs

@Singleton
class PasswordHash {
  val saltSource: SecureRandom = new SecureRandom

  def createToken(): Long = saltSource.nextLong

  // (salt, password_hash)
  def generateWithSalt(password: String, stretchCount: Int = 1000): (Long, Long) = {
    val salt = createToken()
    (salt, generate(password, salt, stretchCount))
  }

  def generate(password: String, salt: Long, stretchCount: Int = 1000): Long = {
    val md = createSha1Encoder
    val saltBytes = Longs.toByteArray(salt)
    val passwordBytes = password.getBytes("utf-8")
    for (_ <- 1 to stretchCount) {
      md.update(saltBytes);
      md.update(passwordBytes)
    }
    Longs.fromByteArray(md.digest())
  }

  def createSha1Encoder = MessageDigest.getInstance("SHA-256")

  def password(length: Int = 24): String =
    new Random(saltSource).alphanumeric.take(length).foldLeft(new StringBuilder)(_.append(_)).toString
}