| 1 | // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | package org.chromium.chrome.browser; |
| 6 | |
| 7 | import android.app.Dialog; |
| 8 | import android.content.Context; |
| 9 | import android.graphics.Typeface; |
| 10 | import android.net.http.SslCertificate; |
| 11 | import android.text.format.DateFormat; |
| 12 | import android.util.Log; |
| 13 | import android.view.View; |
| 14 | import android.widget.AdapterView; |
| 15 | import android.widget.AdapterView.OnItemSelectedListener; |
| 16 | import android.widget.ArrayAdapter; |
| 17 | import android.widget.LinearLayout; |
| 18 | import android.widget.ScrollView; |
| 19 | import android.widget.Spinner; |
| 20 | import android.widget.TextView; |
| 21 | |
| 22 | import org.chromium.chrome.R; |
| 23 | |
| 24 | import java.io.ByteArrayInputStream; |
| 25 | import java.security.MessageDigest; |
| 26 | import java.security.cert.Certificate; |
| 27 | import java.security.cert.CertificateException; |
| 28 | import java.security.cert.CertificateFactory; |
| 29 | import java.security.cert.X509Certificate; |
| 30 | import java.util.ArrayList; |
| 31 | |
| 32 | /** |
| 33 | * UI component for displaying certificate information. |
| 34 | */ |
| 35 | class CertificateViewer implements OnItemSelectedListener { |
| 36 | private static final String X_509 = "X.509"; |
| 37 | private final Context mContext; |
| 38 | private final ArrayList<LinearLayout> mViews; |
| 39 | private final ArrayList<String> mTitles; |
| 40 | private final int mPadding; |
| 41 | private CertificateFactory mCertificateFactory; |
| 42 | |
| 43 | /** |
| 44 | * Show a dialog with the provided certificate information. |
| 45 | * |
| 46 | * @param context The context this view should display in. |
| 47 | * @param derData DER-encoded data representing a X509 certificate chain. |
| 48 | */ |
| 49 | public static void showCertificateChain(Context context, byte[][] derData) { |
| 50 | CertificateViewer viewer = new CertificateViewer(context); |
| 51 | viewer.showCertificateChain(derData); |
| 52 | } |
| 53 | |
| 54 | private CertificateViewer(Context context) { |
| 55 | mContext = context; |
| 56 | mViews = new ArrayList<LinearLayout>(); |
| 57 | mTitles = new ArrayList<String>(); |
| 58 | mPadding = (int) context.getResources().getDimension( |
| 59 | R.dimen.certificate_viewer_padding) / 2; |
| 60 | } |
| 61 | |
| 62 | // Show information about an array of DER-encoded data representing a X509 certificate chain. |
| 63 | // A spinner will be displayed allowing the user to select which certificate to display. |
| 64 | private void showCertificateChain(byte[][] derData) { |
| 65 | for (int i = 0; i < derData.length; i++) { |
| 66 | addCertificate(derData[i]); |
| 67 | } |
| 68 | ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(mContext, |
| 69 | android.R.layout.simple_spinner_item, |
| 70 | mTitles); |
| 71 | arrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); |
| 72 | |
| 73 | Spinner spinner = new Spinner(mContext); |
| 74 | spinner.setAdapter(arrayAdapter); |
| 75 | spinner.setOnItemSelectedListener(this); |
| 76 | |
| 77 | LinearLayout container = new LinearLayout(mContext); |
| 78 | container.setOrientation(LinearLayout.VERTICAL); |
| 79 | container.addView(spinner); |
| 80 | |
| 81 | for (int i = 0; i < mViews.size(); ++i) { |
| 82 | LinearLayout certificateView = mViews.get(i); |
| 83 | if (i != 0) { |
| 84 | certificateView.setVisibility(LinearLayout.GONE); |
| 85 | } |
| 86 | container.addView(certificateView); |
| 87 | } |
| 88 | |
| 89 | showDialogForView(container); |
| 90 | } |
| 91 | |
| 92 | // Displays a dialog with scrolling for the given view. |
| 93 | private void showDialogForView(View view) { |
| 94 | Dialog dialog = new Dialog(mContext); |
| 95 | dialog.setTitle(R.string.certtitle); |
| 96 | ScrollView scrollView = new ScrollView(mContext); |
| 97 | scrollView.addView(view); |
| 98 | dialog.addContentView(scrollView, |
| 99 | new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, |
| 100 | LinearLayout.LayoutParams.MATCH_PARENT)); |
| 101 | dialog.show(); |
| 102 | } |
| 103 | |
| 104 | private void addCertificate(byte[] derData) { |
| 105 | try { |
| 106 | if (mCertificateFactory == null) { |
| 107 | mCertificateFactory = CertificateFactory.getInstance(X_509); |
| 108 | } |
| 109 | Certificate cert = mCertificateFactory.generateCertificate( |
| 110 | new ByteArrayInputStream(derData)); |
| 111 | addCertificateDetails(cert, getDigest(derData, "SHA-256"), getDigest(derData, "SHA-1")); |
| 112 | } catch (CertificateException e) { |
| 113 | Log.e("CertViewer", "Error parsing certificate" + e.toString()); |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | private void addCertificateDetails(Certificate cert, byte[] sha256Digest, byte[] sha1Digest) { |
| 118 | LinearLayout certificateView = new LinearLayout(mContext); |
| 119 | mViews.add(certificateView); |
| 120 | certificateView.setOrientation(LinearLayout.VERTICAL); |
| 121 | |
| 122 | X509Certificate x509 = (X509Certificate) cert; |
| 123 | SslCertificate sslCert = new SslCertificate(x509); |
| 124 | |
| 125 | mTitles.add(sslCert.getIssuedTo().getCName()); |
| 126 | |
| 127 | addSectionTitle(certificateView, nativeGetCertIssuedToText()); |
| 128 | addItem(certificateView, nativeGetCertInfoCommonNameText(), |
| 129 | sslCert.getIssuedTo().getCName()); |
| 130 | addItem(certificateView, nativeGetCertInfoOrganizationText(), |
| 131 | sslCert.getIssuedTo().getOName()); |
| 132 | addItem(certificateView, nativeGetCertInfoOrganizationUnitText(), |
| 133 | sslCert.getIssuedTo().getUName()); |
| 134 | addItem(certificateView, nativeGetCertInfoSerialNumberText(), |
| 135 | formatBytes(x509.getSerialNumber().toByteArray(), ':')); |
| 136 | |
| 137 | addSectionTitle(certificateView, nativeGetCertIssuedByText()); |
| 138 | addItem(certificateView, nativeGetCertInfoCommonNameText(), |
| 139 | sslCert.getIssuedBy().getCName()); |
| 140 | addItem(certificateView, nativeGetCertInfoOrganizationText(), |
| 141 | sslCert.getIssuedBy().getOName()); |
| 142 | addItem(certificateView, nativeGetCertInfoOrganizationUnitText(), |
| 143 | sslCert.getIssuedBy().getUName()); |
| 144 | |
| 145 | addSectionTitle(certificateView, nativeGetCertValidityText()); |
| 146 | java.text.DateFormat dateFormat = DateFormat.getDateFormat(mContext); |
| 147 | addItem(certificateView, nativeGetCertIssuedOnText(), |
| 148 | dateFormat.format(sslCert.getValidNotBeforeDate())); |
| 149 | addItem(certificateView, nativeGetCertExpiresOnText(), |
| 150 | dateFormat.format(sslCert.getValidNotAfterDate())); |
| 151 | |
| 152 | addSectionTitle(certificateView, nativeGetCertFingerprintsText()); |
| 153 | addItem(certificateView, nativeGetCertSHA256FingerprintText(), |
| 154 | formatBytes(sha256Digest, ' ')); |
| 155 | addItem(certificateView, nativeGetCertSHA1FingerprintText(), |
| 156 | formatBytes(sha1Digest, ' ')); |
| 157 | } |
| 158 | |
| 159 | private void addSectionTitle(LinearLayout certificateView, String label) { |
| 160 | TextView title = addLabel(certificateView, label); |
| 161 | title.setAllCaps(true); |
| 162 | } |
| 163 | |
| 164 | private void addItem(LinearLayout certificateView, String label, String value) { |
| 165 | if (value.isEmpty()) return; |
| 166 | |
| 167 | addLabel(certificateView, label); |
| 168 | addValue(certificateView, value); |
| 169 | } |
| 170 | |
| 171 | private TextView addLabel(LinearLayout certificateView, String label) { |
| 172 | TextView t = new TextView(mContext); |
| 173 | t.setPadding(mPadding, mPadding / 2, mPadding, 0); |
| 174 | t.setText(label); |
| 175 | t.setTypeface(Typeface.defaultFromStyle(Typeface.BOLD)); |
| 176 | certificateView.addView(t); |
| 177 | return t; |
| 178 | } |
| 179 | |
| 180 | private void addValue(LinearLayout certificateView, String value) { |
| 181 | TextView t = new TextView(mContext); |
| 182 | t.setText(value); |
| 183 | t.setPadding(mPadding, 0, mPadding, mPadding / 2); |
| 184 | certificateView.addView(t); |
| 185 | } |
| 186 | |
| 187 | private static String formatBytes(byte[] bytes, char separator) { |
| 188 | StringBuilder sb = new StringBuilder(); |
| 189 | for (int i = 0; i < bytes.length; i++) { |
| 190 | sb.append(String.format("%02X", bytes[i])); |
| 191 | if (i != bytes.length - 1) { |
| 192 | sb.append(separator); |
| 193 | } |
| 194 | } |
| 195 | return sb.toString(); |
| 196 | } |
| 197 | |
| 198 | private static byte[] getDigest(byte[] bytes, String algorithm) { |
| 199 | try { |
| 200 | MessageDigest md = MessageDigest.getInstance(algorithm); |
| 201 | md.update(bytes); |
| 202 | return md.digest(); |
| 203 | } catch (java.security.NoSuchAlgorithmException e) { |
| 204 | return null; |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | @Override |
| 209 | public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { |
| 210 | for (int i = 0; i < mViews.size(); ++i) { |
| 211 | mViews.get(i).setVisibility( |
| 212 | i == position ? LinearLayout.VISIBLE : LinearLayout.GONE); |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | @Override |
| 217 | public void onNothingSelected(AdapterView<?> parent) { |
| 218 | } |
| 219 | |
| 220 | private static native String nativeGetCertIssuedToText(); |
| 221 | private static native String nativeGetCertInfoCommonNameText(); |
| 222 | private static native String nativeGetCertInfoOrganizationText(); |
| 223 | private static native String nativeGetCertInfoSerialNumberText(); |
| 224 | private static native String nativeGetCertInfoOrganizationUnitText(); |
| 225 | private static native String nativeGetCertIssuedByText(); |
| 226 | private static native String nativeGetCertValidityText(); |
| 227 | private static native String nativeGetCertIssuedOnText(); |
| 228 | private static native String nativeGetCertExpiresOnText(); |
| 229 | private static native String nativeGetCertFingerprintsText(); |
| 230 | private static native String nativeGetCertSHA256FingerprintText(); |
| 231 | private static native String nativeGetCertSHA1FingerprintText(); |
| 232 | } |