| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * 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.android.server.updates; |
| |
| import android.content.Context; |
| import android.content.Intent; |
| import android.test.AndroidTestCase; |
| import android.provider.Settings; |
| import android.util.Base64; |
| import android.util.Log; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.FileWriter; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.security.cert.CertificateFactory; |
| import java.security.cert.Certificate; |
| import java.security.cert.X509Certificate; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| import java.security.PrivateKey; |
| import java.security.Signature; |
| import java.security.spec.PKCS8EncodedKeySpec; |
| import java.security.KeyFactory; |
| import java.util.HashSet; |
| import java.io.*; |
| import libcore.io.IoUtils; |
| |
| /** |
| * Tests for {@link com.android.server.CertPinInstallReceiver} |
| */ |
| public class CertPinInstallReceiverTest extends AndroidTestCase { |
| |
| private static final String TAG = "CertPinInstallReceiverTest"; |
| |
| private static final String PINLIST_ROOT = System.getenv("ANDROID_DATA") + "/misc/keychain/"; |
| |
| public static final String PINLIST_CONTENT_PATH = PINLIST_ROOT + "pins"; |
| public static final String PINLIST_METADATA_PATH = PINLIST_CONTENT_PATH + "metadata"; |
| |
| public static final String PINLIST_CONTENT_URL_KEY = "pinlist_content_url"; |
| public static final String PINLIST_METADATA_URL_KEY = "pinlist_metadata_url"; |
| public static final String PINLIST_CERTIFICATE_KEY = "config_update_certificate"; |
| public static final String PINLIST_VERSION_KEY = "pinlist_version"; |
| |
| private static final String EXTRA_CONTENT_PATH = "CONTENT_PATH"; |
| 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 void overrideSettings(String key, String value) throws Exception { |
| assertTrue(Settings.Secure.putString(mContext.getContentResolver(), key, value)); |
| Thread.sleep(1000); |
| } |
| |
| private void overrideCert(String value) throws Exception { |
| overrideSettings(PINLIST_CERTIFICATE_KEY, value); |
| } |
| |
| private String readPins() throws Exception { |
| return IoUtils.readFileAsString(PINLIST_CONTENT_PATH); |
| } |
| |
| private String readCurrentVersion() throws Exception { |
| return IoUtils.readFileAsString("/data/misc/keychain/metadata/version"); |
| } |
| |
| private String getNextVersion() throws Exception { |
| int currentVersion = Integer.parseInt(readCurrentVersion()); |
| return Integer.toString(currentVersion + 1); |
| } |
| |
| private static String getCurrentHash(String content) throws Exception { |
| if (content == null) { |
| return "0"; |
| } |
| MessageDigest dgst = MessageDigest.getInstance("SHA512"); |
| byte[] encoded = content.getBytes(); |
| byte[] fingerprint = dgst.digest(encoded); |
| return IntegralToString.bytesToHexString(fingerprint, false); |
| } |
| |
| private static String getHashOfCurrentContent() throws Exception { |
| String content = IoUtils.readFileAsString("/data/misc/keychain/pins"); |
| return getCurrentHash(content); |
| } |
| |
| private PrivateKey createKey() throws Exception { |
| byte[] derKey = Base64.decode(TEST_KEY.getBytes(), Base64.DEFAULT); |
| PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(derKey); |
| KeyFactory keyFactory = KeyFactory.getInstance("RSA"); |
| return (PrivateKey) keyFactory.generatePrivate(keySpec); |
| } |
| |
| private X509Certificate createCertificate() throws Exception { |
| byte[] derCert = Base64.decode(TEST_CERT.getBytes(), Base64.DEFAULT); |
| InputStream istream = new ByteArrayInputStream(derCert); |
| CertificateFactory cf = CertificateFactory.getInstance("X.509"); |
| return (X509Certificate) cf.generateCertificate(istream); |
| } |
| |
| private String makeTemporaryContentFile(String content) throws Exception { |
| FileOutputStream fw = mContext.openFileOutput("content.txt", mContext.MODE_WORLD_READABLE); |
| fw.write(content.getBytes(), 0, content.length()); |
| fw.close(); |
| return mContext.getFilesDir() + "/content.txt"; |
| } |
| |
| private String createSignature(String content, String version, String requiredHash) |
| throws Exception { |
| Signature signer = Signature.getInstance("SHA512withRSA"); |
| signer.initSign(createKey()); |
| signer.update(content.trim().getBytes()); |
| signer.update(version.trim().getBytes()); |
| signer.update(requiredHash.getBytes()); |
| String sig = new String(Base64.encode(signer.sign(), Base64.DEFAULT)); |
| assertEquals(true, |
| verifySignature(content, version, requiredHash, sig, createCertificate())); |
| return sig; |
| } |
| |
| public boolean verifySignature(String content, String version, String requiredPrevious, |
| String signature, X509Certificate cert) throws Exception { |
| Signature signer = Signature.getInstance("SHA512withRSA"); |
| signer.initVerify(cert); |
| signer.update(content.trim().getBytes()); |
| signer.update(version.trim().getBytes()); |
| signer.update(requiredPrevious.trim().getBytes()); |
| return signer.verify(Base64.decode(signature.getBytes(), Base64.DEFAULT)); |
| } |
| |
| private void sendIntent(String contentPath, String version, String required, String sig) { |
| Intent i = new Intent(); |
| i.setAction("android.intent.action.UPDATE_PINS"); |
| i.putExtra(EXTRA_CONTENT_PATH, contentPath); |
| i.putExtra(EXTRA_VERSION_NUMBER, version); |
| i.putExtra(EXTRA_REQUIRED_HASH, required); |
| i.putExtra(EXTRA_SIGNATURE, sig); |
| mContext.sendBroadcast(i); |
| } |
| |
| private String runTest(String cert, String content, String version, String required, String sig) |
| throws Exception { |
| Log.e(TAG, "started test"); |
| overrideCert(cert); |
| String contentPath = makeTemporaryContentFile(content); |
| sendIntent(contentPath, version, required, sig); |
| Thread.sleep(1000); |
| return readPins(); |
| } |
| |
| private String runTestWithoutSig(String cert, String content, String version, String required) |
| throws Exception { |
| String sig = createSignature(content, version, required); |
| return runTest(cert, content, version, required, sig); |
| } |
| |
| public void testOverwritePinlist() throws Exception { |
| Log.e(TAG, "started testOverwritePinList"); |
| assertEquals("abcde", runTestWithoutSig(TEST_CERT, "abcde", getNextVersion(), getHashOfCurrentContent())); |
| Log.e(TAG, "started testOverwritePinList"); |
| } |
| |
| public void testBadSignatureFails() throws Exception { |
| Log.e(TAG, "started testOverwritePinList"); |
| String text = "blahblah"; |
| runTestWithoutSig(TEST_CERT, text, getNextVersion(), getHashOfCurrentContent()); |
| assertEquals(text, runTest(TEST_CERT, "bcdef", getNextVersion(), getCurrentHash(text), "")); |
| Log.e(TAG, "started testOverwritePinList"); |
| } |
| |
| public void testBadRequiredHashFails() throws Exception { |
| runTestWithoutSig(TEST_CERT, "blahblahblah", getNextVersion(), getHashOfCurrentContent()); |
| assertEquals("blahblahblah", runTestWithoutSig(TEST_CERT, "cdefg", getNextVersion(), "0")); |
| Log.e(TAG, "started testOverwritePinList"); |
| } |
| |
| public void testBadVersionFails() throws Exception { |
| String text = "blahblahblahblah"; |
| String version = getNextVersion(); |
| runTestWithoutSig(TEST_CERT, text, version, getHashOfCurrentContent()); |
| assertEquals(text, runTestWithoutSig(TEST_CERT, "defgh", version, getCurrentHash(text))); |
| Log.e(TAG, "started testOverwritePinList"); |
| } |
| |
| public void testOverrideRequiredHash() throws Exception { |
| runTestWithoutSig(TEST_CERT, "blahblahblah", getNextVersion(), getHashOfCurrentContent()); |
| assertEquals("blahblahblah", runTestWithoutSig(TEST_CERT, "cdefg", "NONE", "0")); |
| Log.e(TAG, "started testOverwritePinList"); |
| } |
| |
| } |