abstractdog commented on code in PR #7827:
URL: https://github.com/apache/hadoop/pull/7827#discussion_r2228219825
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/token/SecretManagerConfig.java:
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@@ -0,0 +1,123 @@
+
+package org.apache.hadoop.security.token;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.crypto.KeyGenerator;
+import javax.crypto.Mac;
+import javax.crypto.SecretKey;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * Provides configuration and utility methods for managing cryptographic key
generation
+ * and message authentication code (MAC) generation using specified algorithms
and key lengths.
+ * <p>
+ * This class supports static access to the selected cryptographic algorithm
and key length,
+ * and provides methods to create configured {@link javax.crypto.KeyGenerator}
and {@link javax.crypto.Mac} instances.
+ * The configuration is initialized statically from a provided {@link
Configuration} object.
+ * <p>
+ * The {@link SecretManager} has some static method, so static configuration
is required
+ */
+public class SecretManagerConfig {
+ private static final Logger LOG =
LoggerFactory.getLogger(SecretManagerConfig.class);
+ private static String SELECTED_ALGORITHM;
+ private static int SELECTED_LENGTH;
+
+ static {
+ update(new Configuration());
+ }
+
+ /**
+ * Updates the selected cryptographic algorithm and key length using the
provided
+ * Hadoop {@link Configuration}. This method reads the values for
+ * {@code HADOOP_SECURITY_SECRET_MANAGER_KEY_GENERATOR_ALGORITHM_KEY} and
+ * {@code HADOOP_SECURITY_SECRET_MANAGER_KEY_LENGTH_KEY}, or uses default
values if not set.
+ *
+ * @param conf the configuration object containing cryptographic settings
+ */
+ public static void update(Configuration conf) {
+ SELECTED_ALGORITHM = conf.get(
+
CommonConfigurationKeysPublic.HADOOP_SECURITY_SECRET_MANAGER_KEY_GENERATOR_ALGORITHM_KEY,
+
CommonConfigurationKeysPublic.HADOOP_SECURITY_SECRET_MANAGER_KEY_GENERATOR_ALGORITHM_DEFAULT);
+ LOG.debug("Selected hash algorithm: {}", SELECTED_ALGORITHM);
+ SELECTED_LENGTH = conf.getInt(
+
CommonConfigurationKeysPublic.HADOOP_SECURITY_SECRET_MANAGER_KEY_LENGTH_KEY,
+
CommonConfigurationKeysPublic.HADOOP_SECURITY_SECRET_MANAGER_KEY_LENGTH_DEFAULT);
+ LOG.debug("Selected hash key length: {}", SELECTED_LENGTH);
+ }
+
+ /**
+ * Returns the currently selected cryptographic algorithm.
+ *
+ * @return the name of the selected algorithm
+ */
+ public static String getSelectedAlgorithm() {
+ return SELECTED_ALGORITHM;
+ }
+
+ /**
+ * Returns the currently selected key length in bits.
+ *
+ * @return the selected key length
+ */
+ public static int getSelectedLength() {
+ return SELECTED_LENGTH;
+ }
+
+ /**
+ * Sets the cryptographic algorithm to use.
+ *
+ * @param algorithm the algorithm name (e.g., "HmacSHA256", "AES")
+ */
+ public static void setSelectedAlgorithm(String algorithm) {
+ SELECTED_ALGORITHM = algorithm;
+ LOG.debug("Selected hash algorithm set to {}", algorithm);
+ }
+
+ /**
+ * Sets the cryptographic key length to use (in bits).
+ *
+ * @param length the key length
+ */
+ public static void setSelectedLength(int length) {
+ SELECTED_LENGTH = length;
+ LOG.debug("Selected hash key length set to{}", length);
Review Comment:
nit: 1 space before the length
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