/**
 * Copyright Microsoft 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 com.microsoft.windowsazure.services.blob.implementation;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

import com.sun.jersey.core.util.Base64;

public class HmacSHA256Sign {
    private final String accessKey;

    public HmacSHA256Sign(String accessKey) {
        this.accessKey = accessKey;
    }

    public String sign(String stringToSign) {
        try {
            // Encoding the Signature
            // Signature=Base64(HMAC-SHA256(UTF8(StringToSign)))

            Mac hmac = Mac.getInstance("hmacSHA256");
            hmac.init(new SecretKeySpec(Base64.decode(accessKey), "hmacSHA256"));
            byte[] digest = hmac.doFinal(stringToSign.getBytes("UTF8"));
            return new String(Base64.encode(digest));
        }
        catch (Exception e) {
            throw new IllegalArgumentException("accessKey", e);
        }
    }
}

@@ -105,17 +105,16 @@
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@@ -173,17 +173,16 @@
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@@ -216,19 +216,16 @@
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@@ -266,17 +266,16 @@
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@@ -337,17 +337,16 @@
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@@ -406,17 +406,16 @@
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@@ -482,17 +482,16 @@
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@@ -553,17 +553,16 @@
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@@ -1285,16 +1285,17 @@
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@@ -1343,16 +1343,25 @@
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update the unicode issues in HmacSHA256Sign file, issue 192#.