/**
* OpenAtlasForAndroid Project
* The MIT License (MIT) Copyright (OpenAtlasForAndroid) 2015 Bunny Blue,achellies
* <p>
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
* and associated documentation files (the "Software"), to deal in the Software
* without restriction, including without limitation the rights to use, copy, modify,
* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to the following conditions:
* <p>
* The above copyright notice and this permission notice shall be included in all copies
* or substantial portions of the Software.
* <p>
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
* FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* @author BunnyBlue
**/
package com.openatlas.util;
import android.annotation.TargetApi;
import android.os.Build;
import android.util.Base64;
import java.util.Arrays;
import java.util.jar.Attributes;
/**
* Represents the manifest digest for a package. This is suitable for comparison
* of two packages to know whether the manifests are identical.
*
*/
public class ManifestDigest {
/** The digest of the manifest in our preferred order. */
private final byte[] mDigest;
/** Digest field names to look for in preferred order. */
private static final String[] DIGEST_TYPES = {
"SHA1-Digest", "SHA-Digest", "MD5-Digest",
};
/** What we print out first when toString() is called. */
private static final String TO_STRING_PREFIX = "ManifestDigest {mDigest=";
ManifestDigest(byte[] digest) {
mDigest = digest;
}
@TargetApi(Build.VERSION_CODES.FROYO)
static ManifestDigest fromAttributes(Attributes attributes) {
if (attributes == null) {
return null;
}
String encodedDigest = null;
for (int i = 0; i < DIGEST_TYPES.length; i++) {
final String value = attributes.getValue(DIGEST_TYPES[i]);
if (value != null) {
encodedDigest = value;
break;
}
}
if (encodedDigest == null) {
return null;
}
final byte[] digest = Base64.decode(encodedDigest, Base64.DEFAULT);
return new ManifestDigest(digest);
}
@Override
public boolean equals(Object o) {
if (!(o instanceof ManifestDigest)) {
return false;
}
final ManifestDigest other = (ManifestDigest) o;
return this == other || Arrays.equals(mDigest, other.mDigest);
}
@Override
public int hashCode() {
return Arrays.hashCode(mDigest);
}
}