remove commons-codec since we already have guava

commafeed-server/src/main/java/com/commafeed/backend/Digests.java

@@ -0,0 +1,29 @@
+package com.commafeed.backend;
+
+import java.nio.charset.StandardCharsets;
+
+import com.google.common.hash.HashFunction;
+import com.google.common.hash.Hashing;
+
+import lombok.experimental.UtilityClass;
+
+@UtilityClass
+@SuppressWarnings("deprecation")
+public class Digests {
+
+	public static String sha1Hex(byte[] input) {
+		return hashBytesToHex(Hashing.sha1(), input);
+	}
+
+	public static String sha1Hex(String input) {
+		return hashBytesToHex(Hashing.sha1(), input.getBytes(StandardCharsets.UTF_8));
+	}
+
+	public static String md5Hex(String input) {
+		return hashBytesToHex(Hashing.md5(), input.getBytes(StandardCharsets.UTF_8));
+	}
+
+	private static String hashBytesToHex(HashFunction function, byte[] input) {
+		return function.hashBytes(input).toString();
+	}
+}