initial commit

1 files changed, 37 insertions, 0 deletions

diff --git a/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/support/SecureRandomHolder.java b/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/support/SecureRandomHolder.java
new file mode 100644
index 00000000..0f581dae
--- /dev/null
+++ b/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/support/SecureRandomHolder.java
@@ -0,0 +1,37 @@
+/*******************************************************************************
+ *******************************************************************************/
+package at.gv.egiz.eaaf.core.impl.idp.process.support;
+
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+
+/**
+ * Holder for a secure random instance following the initialization on demand holder design pattern. The secure random
+ * instance is a singleton that is initialized on first usage.
+ * 
+ * @author tknall
+ * 
+ */
+public class SecureRandomHolder {
+
+	private SecureRandomHolder() {
+	}
+
+	private static final SecureRandom SRND_INSTANCE;
+	static {
+		try {
+			SRND_INSTANCE = SecureRandom.getInstance("SHA1PRNG");
+		} catch (NoSuchAlgorithmException e) {
+			throw new RuntimeException("Unable to instantiate SHA1PRNG.", e);
+		}
+	}
+
+	/**
+	 * Returns a secure random generator instance.
+	 * @return The secure random instance.
+	 */
+	public static SecureRandom getInstance() {
+		return SecureRandomHolder.SRND_INSTANCE;
+	}
+
+}
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