Remove signature generation from UpdateTestApp

The need for a signature was removed in internal changes for the
M release. Instead, a permission is required.

Related commits:
12964bf5dd36d13fc25efef7c7175a677f9490a5
ef3d6079a55f559191c90d15e3f30a72b576c499

Bug: 19941636
(cherry picked from commit ba148e2de81badc77ad21daca18996d0766e412e)

Change-Id: Ie107b344b4e60cd4d71fe78a87d2260405d94c3a

2 files changed, 3 insertions, 102 deletions

diff --git a/tzdata/update_test_app/AndroidManifest.xml b/tzdata/update_test_app/AndroidManifest.xml
index 67a8450..081aae5 100644
--- a/tzdata/update_test_app/AndroidManifest.xml
+++ b/tzdata/update_test_app/AndroidManifest.xml
@@ -2,8 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="libcore.tzdata.update_test_app.installupdatetestapp" >
 
-    <uses-permission android:name="android.permission.WRITE_SETTINGS" />
-    <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
+    <uses-permission android:name="android.permission.UPDATE_CONFIG" />
 
     <application
         android:allowBackup="false"
diff --git a/tzdata/update_test_app/src/libcore/tzdata/update_test_app/installupdatetestapp/MainActivity.java b/tzdata/update_test_app/src/libcore/tzdata/update_test_app/installupdatetestapp/MainActivity.java
index f9d911b..2348e43 100644
--- a/tzdata/update_test_app/src/libcore/tzdata/update_test_app/installupdatetestapp/MainActivity.java
+++ b/tzdata/update_test_app/src/libcore/tzdata/update_test_app/installupdatetestapp/MainActivity.java
@@ -29,17 +29,12 @@ import android.widget.Button;
 import android.widget.EditText;
 import android.widget.TextView;
 
-import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.io.StringWriter;
-import java.security.KeyFactory;
-import java.security.PrivateKey;
-import java.security.Signature;
-import java.security.spec.PKCS8EncodedKeySpec;
 import java.util.Date;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
@@ -47,45 +42,9 @@ import java.util.concurrent.Executors;
 
 public class MainActivity extends Activity implements View.OnClickListener {
 
-    private static final String UPDATE_CERTIFICATE_KEY = "config_update_certificate";
     private static final String EXTRA_REQUIRED_HASH = "REQUIRED_HASH";
-    private static final String EXTRA_SIGNATURE = "SIGNATURE";
     private static final String EXTRA_VERSION_NUMBER = "VERSION";
 
-    public static final String TEST_CERT = "" +
-            "MIIDsjCCAxugAwIBAgIJAPLf2gS0zYGUMA0GCSqGSIb3DQEBBQUAMIGYMQswCQYDVQQGEwJVUzET" +
-            "MBEGA1UECBMKQ2FsaWZvcm5pYTEWMBQGA1UEBxMNTW91bnRhaW4gVmlldzEPMA0GA1UEChMGR29v" +
-            "Z2xlMRAwDgYDVQQLEwd0ZXN0aW5nMRYwFAYDVQQDEw1HZXJlbXkgQ29uZHJhMSEwHwYJKoZIhvcN" +
-            "AQkBFhJnY29uZHJhQGdvb2dsZS5jb20wHhcNMTIwNzE0MTc1MjIxWhcNMTIwODEzMTc1MjIxWjCB" +
-            "mDELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExFjAUBgNVBAcTDU1vdW50YWluIFZp" +
-            "ZXcxDzANBgNVBAoTBkdvb2dsZTEQMA4GA1UECxMHdGVzdGluZzEWMBQGA1UEAxMNR2VyZW15IENv" +
-            "bmRyYTEhMB8GCSqGSIb3DQEJARYSZ2NvbmRyYUBnb29nbGUuY29tMIGfMA0GCSqGSIb3DQEBAQUA" +
-            "A4GNADCBiQKBgQCjGGHATBYlmas+0sEECkno8LZ1KPglb/mfe6VpCT3GhSr+7br7NG/ZwGZnEhLq" +
-            "E7YIH4fxltHmQC3Tz+jM1YN+kMaQgRRjo/LBCJdOKaMwUbkVynAH6OYsKevjrOPk8lfM5SFQzJMG" +
-            "sA9+Tfopr5xg0BwZ1vA/+E3mE7Tr3M2UvwIDAQABo4IBADCB/TAdBgNVHQ4EFgQUhzkS9E6G+x8W" +
-            "L4EsmRjDxu28tHUwgc0GA1UdIwSBxTCBwoAUhzkS9E6G+x8WL4EsmRjDxu28tHWhgZ6kgZswgZgx" +
-            "CzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpDYWxpZm9ybmlhMRYwFAYDVQQHEw1Nb3VudGFpbiBWaWV3" +
-            "MQ8wDQYDVQQKEwZHb29nbGUxEDAOBgNVBAsTB3Rlc3RpbmcxFjAUBgNVBAMTDUdlcmVteSBDb25k" +
-            "cmExITAfBgkqhkiG9w0BCQEWEmdjb25kcmFAZ29vZ2xlLmNvbYIJAPLf2gS0zYGUMAwGA1UdEwQF" +
-            "MAMBAf8wDQYJKoZIhvcNAQEFBQADgYEAYiugFDmbDOQ2U/+mqNt7o8ftlEo9SJrns6O8uTtK6AvR" +
-            "orDrR1AXTXkuxwLSbmVfedMGOZy7Awh7iZa8hw5x9XmUudfNxvmrKVEwGQY2DZ9PXbrnta/dwbhK" +
-            "mWfoepESVbo7CKIhJp8gRW0h1Z55ETXD57aGJRvQS4pxkP8ANhM=";
-
-
-    public static final String TEST_KEY = "" +
-            "MIICdgIBADANBgkqhkiG9w0BAQEFAASCAmAwggJcAgEAAoGBAKMYYcBMFiWZqz7SwQQKSejwtnUo" +
-            "+CVv+Z97pWkJPcaFKv7tuvs0b9nAZmcSEuoTtggfh/GW0eZALdPP6MzVg36QxpCBFGOj8sEIl04p" +
-            "ozBRuRXKcAfo5iwp6+Os4+TyV8zlIVDMkwawD35N+imvnGDQHBnW8D/4TeYTtOvczZS/AgMBAAEC" +
-            "gYBxwFalNSwZK3WJipq+g6KLCiBn1JxGGDQlLKrweFaSuFyFky9fd3IvkIabirqQchD612sMb+GT" +
-            "0t1jptW6z4w2w6++IW0A3apDOCwoD+uvDBXrbFqI0VbyAWUNqHVdaFFIRk2IHGEE6463mGRdmILX" +
-            "IlCd/85RTHReg4rl/GFqWQJBANgLAIR4pWbl5Gm+DtY18wp6Q3pJAAMkmP/lISCBIidu1zcqYIKt" +
-            "PoDW4Knq9xnhxPbXrXKv4YzZWHBK8GkKhQ0CQQDBQnXufQcMew+PwiS0oJvS+eQ6YJwynuqG2ejg" +
-            "WE+T7489jKtscRATpUXpZUYmDLGg9bLt7L62hFvFSj2LO2X7AkBcdrD9AWnBFWlh/G77LVHczSEu" +
-            "KCoyLiqxcs5vy/TjLaQ8vw1ZQG580/qJnr+tOxyCjSJ18GK3VppsTRaBznfNAkB3nuCKNp9HTWCL" +
-            "dfrsRsFMrFpk++mSt6SoxXaMbn0LL2u1CD4PCEiQMGt+lK3/3TmRTKNs+23sYS7Ahjxj0udDAkEA" +
-            "p57Nj65WNaWeYiOfTwKXkLj8l29H5NbaGWxPT0XkWr4PvBOFZVH/wj0/qc3CMVGnv11+DyO+QUCN" +
-            "SqBB5aRe8g==";
-
     private EditText actionEditText;
     private EditText versionEditText;
     private EditText contentPathEditText;
@@ -137,27 +96,10 @@ public class MainActivity extends Activity implements View.OnClickListener {
                 }
                 publishProgress("Created copy of " + contentFile + " at " + copyOfContentFile);
 
-                String originalCert = null;
                 try {
-                    originalCert = overrideCert(TEST_CERT);
-                    sleep(1000);
-                    publishProgress("Overridden update cert");
-
-                    String signature = createSignature(copyOfContentFile, version, requiredHash);
-                    sendIntent(copyOfContentFile, action, version, requiredHash, signature);
-                    publishProgress("Sent update intent");
+                    sendIntent(copyOfContentFile, action, version, requiredHash);
                 } catch (Exception e) {
                     publishProgress("Error", exceptionToString(e));
-                } finally {
-                    if (originalCert != null) {
-                        sleep(1000);
-                        try {
-                            overrideCert(originalCert);
-                            publishProgress("Reverted update cert");
-                        } catch (Exception e) {
-                            publishProgress("Unable to revert update cert", exceptionToString(e));
-                        }
-                    }
                 }
                 publishProgress("Update intent sent successfully");
                 return null;
@@ -172,15 +114,6 @@ public class MainActivity extends Activity implements View.OnClickListener {
         }.executeOnExecutor(executor);
     }
 
-    private String overrideCert(String cert) throws Exception {
-        final String key = UPDATE_CERTIFICATE_KEY;
-        String originalCert = Settings.Secure.getString(getContentResolver(), key);
-        if (!Settings.Secure.putString(getContentResolver(), key, cert)) {
-            throw new Exception("Unable to override update certificate");
-        }
-        return originalCert;
-    }
-
     private void sleep(long millisDelay) {
         try {
             Thread.sleep(millisDelay);
@@ -190,7 +123,7 @@ public class MainActivity extends Activity implements View.OnClickListener {
     }
 
     private void sendIntent(
-            File contentFile, String action, String version, String required, String sig) {
+            File contentFile, String action, String version, String required) {
         Intent i = new Intent();
         i.setAction(action);
         Uri contentUri =
@@ -201,7 +134,6 @@ public class MainActivity extends Activity implements View.OnClickListener {
         i.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
         i.putExtra(EXTRA_VERSION_NUMBER, version);
         i.putExtra(EXTRA_REQUIRED_HASH, required);
-        i.putExtra(EXTRA_SIGNATURE, sig);
         sendBroadcast(i);
     }
 
@@ -220,36 +152,6 @@ public class MainActivity extends Activity implements View.OnClickListener {
         logView.scrollTo(0, scrollAmount);
     }
 
-    private static String createSignature(File contentFile, String version, String requiredHash)
-            throws Exception {
-        byte[] contentBytes = readBytes(contentFile);
-        Signature signer = Signature.getInstance("SHA512withRSA");
-        signer.initSign(createKey());
-        signer.update(contentBytes);
-        signer.update(version.trim().getBytes());
-        signer.update(requiredHash.getBytes());
-        return new String(Base64.encode(signer.sign(), Base64.DEFAULT));
-    }
-
-    private static byte[] readBytes(File contentFile) throws IOException {
-        ByteArrayOutputStream baos = new ByteArrayOutputStream();
-        try (FileInputStream fis = new FileInputStream(contentFile)) {
-            int count;
-            byte[] buffer = new byte[8192];
-            while ((count = fis.read(buffer)) != -1) {
-                baos.write(buffer, 0, count);
-            }
-        }
-        return baos.toByteArray();
-    }
-
-    private static PrivateKey createKey() throws Exception {
-        byte[] derKey = Base64.decode(TEST_KEY.getBytes(), Base64.DEFAULT);
-        PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(derKey);
-        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
-        return keyFactory.generatePrivate(keySpec);
-    }
-
     private static String exceptionToString(Exception e) {
         StringWriter writer = new StringWriter();
         e.printStackTrace(new PrintWriter(writer));