| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php |
| * |
| * 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.android.ide.eclipse.adt.internal.utils; |
| |
| import java.util.Locale; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| import java.security.cert.Certificate; |
| import java.security.cert.CertificateEncodingException; |
| |
| public class FingerprintUtils { |
| |
| /** |
| * Returns the {@link Certificate} fingerprint as returned by <code>keytool</code>. |
| * |
| * @param certificate |
| * @param hashAlgorithm |
| */ |
| public static String getFingerprint(Certificate cert, String hashAlgorithm) { |
| if (cert == null) { |
| return null; |
| } |
| try { |
| MessageDigest digest = MessageDigest.getInstance(hashAlgorithm); |
| return toHexadecimalString(digest.digest(cert.getEncoded())); |
| } catch(NoSuchAlgorithmException e) { |
| // ignore |
| } catch(CertificateEncodingException e) { |
| // ignore |
| } |
| return null; |
| } |
| |
| private static String toHexadecimalString(byte[] value) { |
| StringBuffer sb = new StringBuffer(); |
| int len = value.length; |
| for (int i = 0; i < len; i++) { |
| int num = ((int) value[i]) & 0xff; |
| if (num < 0x10) { |
| sb.append('0'); |
| } |
| sb.append(Integer.toHexString(num)); |
| if (i < len - 1) { |
| sb.append(':'); |
| } |
| } |
| return sb.toString().toUpperCase(Locale.US); |
| } |
| } |