1 files changed, 63 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/utils/FingerprintUtils.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/utils/FingerprintUtils.java
new file mode 100644
index 000000000..bfe301e36
--- /dev/null
+++ b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/utils/FingerprintUtils.java
@@ -0,0 +1,63 @@
+/*
+ * 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);
+    }
+}
+\ No newline at end of file