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From arina-ielchiieva <...@git.apache.org>
Subject [GitHub] drill pull request #865: DRILL-5634 - Add Crypto and Hash Functions
Date Tue, 04 Jul 2017 12:10:17 GMT
Github user arina-ielchiieva commented on a diff in the pull request:

    https://github.com/apache/drill/pull/865#discussion_r125451645
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/expr/fn/impl/CryptoFunctions.java
---
    @@ -0,0 +1,345 @@
    +/**
    + * Licensed to the Apache Software Foundation (ASF) under one
    + * or more contributor license agreements.  See the NOTICE file
    + * distributed with this work for additional information
    + * regarding copyright ownership.  The ASF licenses this file
    + * to you 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
    + * <p/>
    + * http://www.apache.org/licenses/LICENSE-2.0
    + * <p/>
    + * 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 org.apache.drill.exec.expr.fn.impl;
    +
    +import io.netty.buffer.DrillBuf;
    +import org.apache.drill.exec.expr.DrillSimpleFunc;
    +import org.apache.drill.exec.expr.annotations.FunctionTemplate;
    +import org.apache.drill.exec.expr.annotations.Output;
    +import org.apache.drill.exec.expr.annotations.Param;
    +import org.apache.drill.exec.expr.annotations.Workspace;
    +import org.apache.drill.exec.expr.holders.VarCharHolder;
    +
    +import javax.crypto.Cipher;
    +import javax.crypto.spec.SecretKeySpec;
    +import javax.inject.Inject;
    +
    +public class CryptoFunctions {
    +  static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(CryptoFunctions.class);
    +
    +  private CryptoFunctions() {
    +  }
    +
    +  @FunctionTemplate(name = "md5", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls
= FunctionTemplate.NullHandling.NULL_IF_NULL)
    +  public static class MD5Function implements DrillSimpleFunc {
    +
    +    @Param
    +    VarCharHolder rawInput;
    +
    +    @Output
    +    VarCharHolder out;
    +
    +    @Inject
    +    DrillBuf buffer;
    +
    +    @Workspace
    +    java.security.MessageDigest md;
    +
    +    @Override
    +    public void setup() {
    +      try {
    +        md = java.security.MessageDigest.getInstance("MD5");
    +      } catch (Exception e) {
    +        logger.debug(e.getMessage());
    +      }
    +    }
    +
    +    @Override
    +    public void eval() {
    +
    +      String input = org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers.toStringFromUTF8(rawInput.start,
rawInput.end, rawInput.buffer);
    +      byte[] thedigest = null;
    +      String outputString = "";
    +
    +      try {
    +        byte[] bytesOfMessage = input.getBytes("UTF-8");
    +        thedigest = md.digest(bytesOfMessage);
    +        outputString = String.format("%032X", new java.math.BigInteger(1, thedigest));
    +        outputString = outputString.toLowerCase();
    +
    +      } catch (Exception e) {
    +        logger.debug(e.getMessage());
    +      }
    +      out.buffer = buffer;
    +      out.start = 0;
    +      out.end = outputString.getBytes().length;
    +      buffer.setBytes(0, outputString.getBytes());
    +    }
    +
    +  }
    +
    +
    +  @FunctionTemplate(names = {"sha", "sha1"}, scope = FunctionTemplate.FunctionScope.SIMPLE,
nulls = FunctionTemplate.NullHandling.NULL_IF_NULL)
    +  public static class SHA1Function implements DrillSimpleFunc {
    +
    +    @Param
    +    VarCharHolder rawInput;
    +
    +    @Output
    +    VarCharHolder out;
    +
    +    @Inject
    +    DrillBuf buffer;
    +
    +    @Override
    +    public void setup() {
    +
    +    }
    +
    +    @Override
    +    public void eval() {
    +
    +      String input = org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers.toStringFromUTF8(rawInput.start,
rawInput.end, rawInput.buffer);
    +
    +      String sha1 = org.apache.commons.codec.digest.DigestUtils.sha1Hex(input);
    +
    +      out.buffer = buffer;
    +      out.start = 0;
    +      out.end = sha1.getBytes().length;
    +      buffer.setBytes(0, sha1.getBytes());
    +    }
    +
    +  }
    +
    +  @FunctionTemplate(names = {"sha256", "sha2"}, scope = FunctionTemplate.FunctionScope.SIMPLE,
nulls = FunctionTemplate.NullHandling.NULL_IF_NULL)
    +  public static class SHA256Function implements DrillSimpleFunc {
    +
    +    @Param
    +    VarCharHolder rawInput;
    +
    +    @Output
    +    VarCharHolder out;
    +
    +    @Inject
    +    DrillBuf buffer;
    +
    +
    +    @Override
    +    public void setup() {
    +
    +    }
    +
    +    @Override
    +    public void eval() {
    +
    +      String input = org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers.toStringFromUTF8(rawInput.start,
rawInput.end, rawInput.buffer);
    +
    +      String sha2 = org.apache.commons.codec.digest.DigestUtils.sha256Hex(input);
    +
    +      out.buffer = buffer;
    +      out.start = 0;
    +      out.end = sha2.getBytes().length;
    +      buffer.setBytes(0, sha2.getBytes());
    +    }
    +
    +  }
    +
    +  @FunctionTemplate(name = "sha384", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls
= FunctionTemplate.NullHandling.NULL_IF_NULL)
    +  public static class SHA384Function implements DrillSimpleFunc {
    +
    +    @Param
    +    VarCharHolder rawInput;
    +
    +    @Output
    +    VarCharHolder out;
    +
    +    @Inject
    +    DrillBuf buffer;
    +
    +    @Override
    +    public void setup() {
    +
    +    }
    +
    +    @Override
    +    public void eval() {
    +
    +      String input = org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers.toStringFromUTF8(rawInput.start,
rawInput.end, rawInput.buffer);
    +
    +      String sha384 = org.apache.commons.codec.digest.DigestUtils.sha384Hex(input);
    +
    +      out.buffer = buffer;
    +      out.start = 0;
    +      out.end = sha384.getBytes().length;
    +      buffer.setBytes(0, sha384.getBytes());
    +    }
    +
    +  }
    +
    +  @FunctionTemplate(name = "sha512", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls
= FunctionTemplate.NullHandling.NULL_IF_NULL)
    +  public static class SHA512Function implements DrillSimpleFunc {
    +
    +    @Param
    +    VarCharHolder rawInput;
    +
    +    @Output
    +    VarCharHolder out;
    +
    +    @Inject
    +    DrillBuf buffer;
    +
    +    @Override
    +    public void setup() {
    +
    +    }
    +
    +    @Override
    +    public void eval() {
    +
    +      String input = org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers.toStringFromUTF8(rawInput.start,
rawInput.end, rawInput.buffer);
    +
    +      String sha512 = org.apache.commons.codec.digest.DigestUtils.sha512Hex(input);
    +
    +      out.buffer = buffer;
    +      out.start = 0;
    +      out.end = sha512.getBytes().length;
    +      buffer.setBytes(0, sha512.getBytes());
    +    }
    +
    +  }
    +
    +  @FunctionTemplate(name = "aes_encrypt", scope = FunctionTemplate.FunctionScope.SIMPLE,
nulls = FunctionTemplate.NullHandling.NULL_IF_NULL)
    +  public static class AESEncryptFunction implements DrillSimpleFunc {
    +
    +    @Param
    +    VarCharHolder rawInput;
    +
    +    @Param
    +    VarCharHolder rawKey;
    +
    +    @Output
    +    VarCharHolder out;
    +
    +    @Inject
    +    DrillBuf buffer;
    +
    +    @Workspace
    +    String key;
    +
    +    @Workspace
    +    SecretKeySpec secretKey;
    +
    +    @Workspace
    +    byte[] keyByteArray;
    +
    +    @Workspace
    +    Cipher cipher;
    +
    +    @Override
    +    public void setup() {
    +      key = org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers.toStringFromUTF8(rawKey.start,
rawKey.end, rawKey.buffer);
    +      java.security.MessageDigest sha = null;
    +      try {
    +        keyByteArray = key.getBytes("UTF-8");
    +        sha = java.security.MessageDigest.getInstance("SHA-1");
    +        keyByteArray = sha.digest(keyByteArray);
    +        keyByteArray = java.util.Arrays.copyOf(keyByteArray, 16);
    +        secretKey = new SecretKeySpec(keyByteArray, "AES");
    +
    +        cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
    +        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
    +      } catch (Exception e) {
    +        logger.debug(e.getMessage());
    +      }
    +    }
    +
    +    @Override
    +    public void eval() {
    +
    +      String input = org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers.toStringFromUTF8(rawInput.start,
rawInput.end, rawInput.buffer);
    +      String encryptedText = "";
    +      try {
    +        encryptedText = javax.xml.bind.DatatypeConverter.printBase64Binary(cipher.doFinal(input.getBytes("UTF-8")));
    +      } catch (Exception e) {
    +        logger.debug(e.getMessage());
    +      }
    +
    +      out.buffer = buffer;
    +      out.start = 0;
    +      out.end = encryptedText.getBytes().length;
    +      buffer.setBytes(0, encryptedText.getBytes());
    +    }
    +
    +  }
    +
    +
    +  @FunctionTemplate(name = "aes_decrypt", scope = FunctionTemplate.FunctionScope.SIMPLE,
nulls = FunctionTemplate.NullHandling.NULL_IF_NULL)
    +  public static class AESDecryptFunction implements DrillSimpleFunc {
    +
    +    @Param
    +    VarCharHolder rawInput;
    +
    +    @Param
    +    VarCharHolder rawKey;
    +
    +    @Output
    +    VarCharHolder out;
    +
    +    @Inject
    +    DrillBuf buffer;
    +
    +    @Workspace
    +    String key;
    +
    +    @Workspace
    +    SecretKeySpec secretKey;
    +
    +    @Workspace
    +    byte[] keyByteArray;
    --- End diff --
    
    Why do we need `key`, `secretKey` and `keyByteArray` as workspace parametesr? It seems
we only use it internally in `setup()` method.


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