ferencerdei commented on code in PR #6877: URL: https://github.com/apache/nifi/pull/6877#discussion_r1088689378
########## nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/VerifyContentMAC.java: ########## @@ -0,0 +1,187 @@ +/* + * 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 + * + * 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 org.apache.nifi.processors.standard; + +import java.io.IOException; +import java.io.InputStream; +import java.nio.charset.Charset; +import java.nio.charset.StandardCharsets; +import java.security.InvalidKeyException; +import java.security.NoSuchAlgorithmException; +import java.util.Arrays; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; +import javax.crypto.Mac; +import javax.crypto.spec.SecretKeySpec; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.util.StandardValidators; + +@InputRequirement(InputRequirement.Requirement.INPUT_REQUIRED) +@Tags({"Encryption", "Signing", "MAC", "HMAC"}) +@CapabilityDescription("Calculates MAC using the provided Secret Key and compares it with the provided MAC parameter") +@EventDriven +@WritesAttributes({ + @WritesAttribute(attribute = VerifyContentMAC.MAC_CALCULATED_ATTRIBUTE, description = "The calculated MAC value"), + @WritesAttribute(attribute = VerifyContentMAC.MAC_ALGORITHM_ATTRIBUTE, description = "The MAC algorithm")}) +public class VerifyContentMAC extends AbstractProcessor { + + protected static final String HMAC_SHA256 = "HmacSHA256"; + protected static final String HMAC_SHA512 = "HmacSHA512"; + + protected static final PropertyDescriptor MAC_ALGORITHM = new PropertyDescriptor.Builder() + .name("MAC_ALGORITHM") + .displayName("MAC Algorithm") + .description("Cryptographic Hash Function") + .allowableValues(HMAC_SHA256, HMAC_SHA512) + .required(true) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + + protected static final PropertyDescriptor SECRET_KEY = new PropertyDescriptor.Builder() + .name("SECRET_KEY") + .displayName("Secret key") + .description("Cryptographic key to calculate the hash") + .required(true) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .sensitive(true) + .build(); + + protected static final PropertyDescriptor MAC = new PropertyDescriptor.Builder() + .name("MAC") + .displayName("Message Authentication Code") + .description("The MAC to compare with the calculated value") + .required(true) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .expressionLanguageSupported(ExpressionLanguageScope.FLOWFILE_ATTRIBUTES) + .build(); + + protected static final Relationship FAILURE = new Relationship.Builder() + .name("failure") + .description("Signature Verification Failed") + .build(); + + protected static final Relationship SUCCESS = new Relationship.Builder() + .name("success") + .description("Signature Verification Succeeded") + .build(); + + private static final List<PropertyDescriptor> PROPERTIES = Collections.unmodifiableList(Arrays.asList(MAC_ALGORITHM, SECRET_KEY, MAC)); + private static final Set<Relationship> RELATIONSHIPS = Collections.unmodifiableSet(new HashSet<>(Arrays.asList(SUCCESS, FAILURE)));; + private static final Charset CHARSET = StandardCharsets.UTF_8; + private static final int BUFFER_SIZE = 512000; + private static final String HEX_FORMAT = "%02x"; + protected static final String MAC_CALCULATED_ATTRIBUTE = "mac.calculated"; + protected static final String MAC_ALGORITHM_ATTRIBUTE = "mac.algorithm"; + + private SecretKeySpec secretKeySpec; + + @Override + protected List<PropertyDescriptor> getSupportedPropertyDescriptors() { + return PROPERTIES; + } + + @Override + public Set<Relationship> getRelationships() { + return RELATIONSHIPS; + } + + @OnScheduled + public void setUp(ProcessContext context) { + secretKeySpec = new SecretKeySpec(context.getProperty(SECRET_KEY).getValue().getBytes(CHARSET), HMAC_SHA256); + } + + @Override + public void onTrigger(ProcessContext context, ProcessSession session) throws ProcessException { + FlowFile flowFile = session.get(); + + if (flowFile == null) { + return; + } + + try { + String incomingMac = context.getProperty(MAC).evaluateAttributeExpressions(flowFile).getValue(); + String algorithm = context.getProperty(MAC_ALGORITHM).getValue(); + String calculatedMac = getCalculatedMac(session, flowFile, algorithm); + + flowFile = enrichFlowFileAttributes(session, flowFile, algorithm, calculatedMac); + + if (!incomingMac.equals(calculatedMac)) { + session.transfer(flowFile, FAILURE); + } else { + session.transfer(flowFile, SUCCESS); + } + } catch (IOException e) { + getLogger().error("Request Processing failed: {}", flowFile, e); + session.penalize(flowFile); + session.transfer(flowFile, FAILURE); + } catch (NoSuchAlgorithmException | InvalidKeyException e) { + getLogger().error("Encountered an error during HMAC generation: ", e); + context.yield(); + } + } + + private FlowFile enrichFlowFileAttributes(ProcessSession session, FlowFile flowFile, String algorithm, String calculatedMac) { Review Comment: done ########## nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/VerifyContentMAC.java: ########## @@ -0,0 +1,187 @@ +/* + * 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 + * + * 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 org.apache.nifi.processors.standard; + +import java.io.IOException; +import java.io.InputStream; +import java.nio.charset.Charset; +import java.nio.charset.StandardCharsets; +import java.security.InvalidKeyException; +import java.security.NoSuchAlgorithmException; +import java.util.Arrays; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; +import javax.crypto.Mac; +import javax.crypto.spec.SecretKeySpec; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.util.StandardValidators; + +@InputRequirement(InputRequirement.Requirement.INPUT_REQUIRED) +@Tags({"Encryption", "Signing", "MAC", "HMAC"}) +@CapabilityDescription("Calculates MAC using the provided Secret Key and compares it with the provided MAC parameter") +@EventDriven +@WritesAttributes({ + @WritesAttribute(attribute = VerifyContentMAC.MAC_CALCULATED_ATTRIBUTE, description = "The calculated MAC value"), + @WritesAttribute(attribute = VerifyContentMAC.MAC_ALGORITHM_ATTRIBUTE, description = "The MAC algorithm")}) +public class VerifyContentMAC extends AbstractProcessor { + + protected static final String HMAC_SHA256 = "HmacSHA256"; + protected static final String HMAC_SHA512 = "HmacSHA512"; + + protected static final PropertyDescriptor MAC_ALGORITHM = new PropertyDescriptor.Builder() + .name("MAC_ALGORITHM") + .displayName("MAC Algorithm") + .description("Cryptographic Hash Function") + .allowableValues(HMAC_SHA256, HMAC_SHA512) + .required(true) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + + protected static final PropertyDescriptor SECRET_KEY = new PropertyDescriptor.Builder() + .name("SECRET_KEY") + .displayName("Secret key") + .description("Cryptographic key to calculate the hash") + .required(true) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .sensitive(true) + .build(); + + protected static final PropertyDescriptor MAC = new PropertyDescriptor.Builder() + .name("MAC") + .displayName("Message Authentication Code") + .description("The MAC to compare with the calculated value") + .required(true) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .expressionLanguageSupported(ExpressionLanguageScope.FLOWFILE_ATTRIBUTES) + .build(); + + protected static final Relationship FAILURE = new Relationship.Builder() + .name("failure") + .description("Signature Verification Failed") + .build(); + + protected static final Relationship SUCCESS = new Relationship.Builder() + .name("success") + .description("Signature Verification Succeeded") + .build(); + + private static final List<PropertyDescriptor> PROPERTIES = Collections.unmodifiableList(Arrays.asList(MAC_ALGORITHM, SECRET_KEY, MAC)); + private static final Set<Relationship> RELATIONSHIPS = Collections.unmodifiableSet(new HashSet<>(Arrays.asList(SUCCESS, FAILURE)));; + private static final Charset CHARSET = StandardCharsets.UTF_8; + private static final int BUFFER_SIZE = 512000; + private static final String HEX_FORMAT = "%02x"; + protected static final String MAC_CALCULATED_ATTRIBUTE = "mac.calculated"; + protected static final String MAC_ALGORITHM_ATTRIBUTE = "mac.algorithm"; + + private SecretKeySpec secretKeySpec; + + @Override + protected List<PropertyDescriptor> getSupportedPropertyDescriptors() { + return PROPERTIES; + } + + @Override + public Set<Relationship> getRelationships() { + return RELATIONSHIPS; + } + + @OnScheduled + public void setUp(ProcessContext context) { + secretKeySpec = new SecretKeySpec(context.getProperty(SECRET_KEY).getValue().getBytes(CHARSET), HMAC_SHA256); + } + + @Override + public void onTrigger(ProcessContext context, ProcessSession session) throws ProcessException { + FlowFile flowFile = session.get(); + + if (flowFile == null) { + return; + } + + try { + String incomingMac = context.getProperty(MAC).evaluateAttributeExpressions(flowFile).getValue(); + String algorithm = context.getProperty(MAC_ALGORITHM).getValue(); + String calculatedMac = getCalculatedMac(session, flowFile, algorithm); + + flowFile = enrichFlowFileAttributes(session, flowFile, algorithm, calculatedMac); + + if (!incomingMac.equals(calculatedMac)) { + session.transfer(flowFile, FAILURE); + } else { + session.transfer(flowFile, SUCCESS); + } + } catch (IOException e) { + getLogger().error("Request Processing failed: {}", flowFile, e); + session.penalize(flowFile); + session.transfer(flowFile, FAILURE); + } catch (NoSuchAlgorithmException | InvalidKeyException e) { + getLogger().error("Encountered an error during HMAC generation: ", e); + context.yield(); + } Review Comment: done -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@nifi.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
