HMACSHA1Signature.java

/*
 * Copyright 2007 Sxip Identity Corporation
 *
 * Licensed 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 net.oauth.j2me.signature;

import java.io.UnsupportedEncodingException;

import net.oauth.j2me.Util;

import org.bouncycastle.crypto.digests.SHA1Digest;
import org.bouncycastle.crypto.macs.HMac;
import org.bouncycastle.crypto.params.KeyParameter;

public class HMACSHA1Signature implements OAuthSignature {
	private String method;
	private String message;
	private String key;
	private String signature;

	public HMACSHA1Signature() {
		method = "HMAC-SHA1";
		message = "";
		signature = "";
	}

	public String getMethod() {
		return method;
	}

	public String getMessage() {
		return message;
	}

	public void setMessage(String message) {
		this.message = message;
	}

	public String getKey() {
		return key;
	}

	public void setKey(String key) {
		this.key = key;
	}

	public String getSignature() {
		try {
			HMac m = new HMac(new SHA1Digest());
			m.init(new KeyParameter(key.getBytes("UTF-8")));
			byte[] bytes = message.getBytes("UTF-8");
			m.update(bytes, 0, bytes.length);
			byte[] mac = new byte[m.getMacSize()];
			m.doFinal(mac, 0);
			signature = new String(Util.base64Encode(mac));

			// debug
			System.out.println("mac alg: " + m.getAlgorithmName());
			System.out.println("dig alg: "
					+ m.getUnderlyingDigest().getAlgorithmName());
			System.out.println("key: " + key);
			System.out.println("message: " + message);
			System.out.println("unencoded: " + new String(mac));
			System.out.println("sig: " + signature);
		} catch (UnsupportedEncodingException e) {
			;
		} catch (Exception e) {
			;
		}

		return signature;
	}
}