[PPML] Implement verifyQuote in QuoteVerifier.scala (intel-analytics#…

…5495)

* Add SGXDCAMQuoteVerifierImpl in for QuoteVerifier
* Add unit test for SGXDCAPQuoteVerifierImpl
* Move attestation.Attestation to dcap.Attestation

scala/ppml/src/main/scala/com/intel/analytics/bigdl/ppml/attestation/SGXDCAPQuoteVerifierImpl.scala

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2016 The BigDL 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
+ *
+ *     http://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.
+ */
+
+package com.intel.analytics.bigdl.ppml.attestation
+
+import com.intel.analytics.bigdl.ppml.dcap.Attestation
+import org.apache.logging.log4j.LogManager
+
+/**
+ * Verify SGX quote with SGX SDK
+ */
+class SGXDCAPQuoteVerifierImpl extends QuoteVerifier with Serializable {
+  val logger = LogManager.getLogger(getClass)
+
+  @throws(classOf[AttestationRuntimeException])
+  override def verifyQuote(quote: Array[Byte]): Int = {
+
+    try {
+      val verifyQuoteResult = Attestation.sdkVerifyQuote(quote)
+      return verifyQuoteResult
+    } catch {
+      case e: Exception =>
+        logger.error(s"Failed to verify quote, ${e}")
+        throw new AttestationRuntimeException("Failed " +
+          "to verify quote", e)
+    }
+
+    throw new AttestationRuntimeException("Unexpected workflow when verifying Quote!")
+  }
+}

scala/ppml/src/test/scala/com/intel/analytics/bigdl/ppml/attestation/SGXDCAPQuoteVerifierImplSpec.scala

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2016 The BigDL 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
+ *
+ *     http://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.
+ */
+
+package com.intel.analytics.bigdl.ppml.attestation
+
+import com.intel.analytics.bigdl.dllib.common.zooUtils
+import java.io.{BufferedOutputStream, BufferedInputStream};
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import org.apache.logging.log4j.LogManager
+import org.scalatest.{FlatSpec, Matchers}
+import scala.io.Source
+import scala.language.postfixOps
+import sys.env
+import sys.process._
+
+class SGXDCAPQuoteVerifierImplSpec extends FlatSpec with Matchers {
+
+  val logger = LogManager.getLogger(getClass)
+  var tmpDir: File = _
+  val sGXDCAPQuoteVerifierImplSpec = new SGXDCAPQuoteVerifierImpl()
+
+  val quoteUrl = if (env.contains("FTP_URI")) {
+    env("FTP_URI").toString
+  }
+
+  tmpDir = zooUtils.createTmpDir("ZooPPML").toFile()
+  val dir = new File(s"${tmpDir.getAbsolutePath}/SGXDCAPQuoteVerifierImplSpec").getCanonicalPath
+  s"wget -nv -P $dir $quoteUrl" !;
+  val quotePath = s"$dir/sgxdcap_quote.dat"
+
+  // SGXDCAPQuoteVerifierImplSpec
+  "SGX DCAP verify Quote " should "work" in {
+    val quoteFile = new File(quotePath)
+    val in = new FileInputStream(quoteFile)
+    val bufIn = new BufferedInputStream(in)
+    val quote = Iterator.continually(bufIn.read()).takeWhile(_ != -1).map(_.toByte).toArray
+    bufIn.close()
+    in.close()
+    logger.info(quote)
+    val verifyQuoteResult = sGXDCAPQuoteVerifierImplSpec.verifyQuote(quote)
+    verifyQuoteResult shouldNot equal(-1)
+    logger.info(verifyQuoteResult)
+  }
+}