diff options
Diffstat (limited to 'OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyTrustFragment.java')
| -rw-r--r-- | OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyTrustFragment.java | 460 |
1 files changed, 460 insertions, 0 deletions
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyTrustFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyTrustFragment.java new file mode 100644 index 000000000..5483d16b8 --- /dev/null +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyTrustFragment.java @@ -0,0 +1,460 @@ +/* + * Copyright (C) 2014 Tim Bray <tbray@textuality.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +package org.sufficientlysecure.keychain.ui; + +import android.app.ProgressDialog; +import android.content.Intent; +import android.database.Cursor; +import android.graphics.Typeface; +import android.net.Uri; +import android.os.AsyncTask; +import android.os.Bundle; +import android.os.Message; +import android.os.Messenger; +import android.support.v4.app.LoaderManager; +import android.support.v4.content.CursorLoader; +import android.support.v4.content.Loader; +import android.text.SpannableStringBuilder; +import android.text.Spanned; +import android.text.method.LinkMovementMethod; +import android.text.style.ClickableSpan; +import android.text.style.StyleSpan; +import android.text.style.URLSpan; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.widget.TableLayout; +import android.widget.TableRow; +import android.widget.TextView; + +import com.textuality.keybase.lib.KeybaseException; +import com.textuality.keybase.lib.Proof; +import com.textuality.keybase.lib.User; + +import org.sufficientlysecure.keychain.Constants; +import org.sufficientlysecure.keychain.R; +import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings; +import org.sufficientlysecure.keychain.service.KeychainIntentService; +import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler; +import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils; +import org.sufficientlysecure.keychain.util.Log; + +import java.util.ArrayList; +import java.util.Date; +import java.util.Hashtable; +import java.util.List; + +public class ViewKeyTrustFragment extends LoaderFragment implements + LoaderManager.LoaderCallbacks<Cursor> { + + public static final String ARG_DATA_URI = "uri"; + + private View mStartSearch; + private TextView mTrustReadout; + private TextView mReportHeader; + private TableLayout mProofListing; + private LayoutInflater mInflater; + private View mProofVerifyHeader; + private TextView mProofVerifyDetail; + + private static final int LOADER_ID_DATABASE = 1; + + // for retrieving the key we’re working on + private Uri mDataUri; + + @Override + public View onCreateView(LayoutInflater inflater, ViewGroup superContainer, Bundle savedInstanceState) { + View root = super.onCreateView(inflater, superContainer, savedInstanceState); + View view = inflater.inflate(R.layout.view_key_trust_fragment, getContainer()); + mInflater = inflater; + + mTrustReadout = (TextView) view.findViewById(R.id.view_key_trust_readout); + mStartSearch = view.findViewById(R.id.view_key_trust_search_cloud); + mStartSearch.setEnabled(false); + mReportHeader = (TextView) view.findViewById(R.id.view_key_trust_cloud_narrative); + mProofListing = (TableLayout) view.findViewById(R.id.view_key_proof_list); + mProofVerifyHeader = view.findViewById(R.id.view_key_proof_verify_header); + mProofVerifyDetail = (TextView) view.findViewById(R.id.view_key_proof_verify_detail); + mReportHeader.setVisibility(View.GONE); + mProofListing.setVisibility(View.GONE); + mProofVerifyHeader.setVisibility(View.GONE); + mProofVerifyDetail.setVisibility(View.GONE); + + return root; + } + + @Override + public void onActivityCreated(Bundle savedInstanceState) { + super.onActivityCreated(savedInstanceState); + + Uri dataUri = getArguments().getParcelable(ARG_DATA_URI); + if (dataUri == null) { + Log.e(Constants.TAG, "Data missing. Should be Uri of key!"); + getActivity().finish(); + return; + } + mDataUri = dataUri; + + // retrieve the key from the database + getLoaderManager().initLoader(LOADER_ID_DATABASE, null, this); + } + + static final String[] TRUST_PROJECTION = new String[]{ + KeyRings._ID, KeyRings.FINGERPRINT, KeyRings.IS_REVOKED, KeyRings.EXPIRY, + KeyRings.HAS_ANY_SECRET, KeyRings.VERIFIED + }; + static final int INDEX_TRUST_FINGERPRINT = 1; + static final int INDEX_TRUST_IS_REVOKED = 2; + static final int INDEX_TRUST_EXPIRY = 3; + static final int INDEX_UNIFIED_HAS_ANY_SECRET = 4; + static final int INDEX_VERIFIED = 5; + + public Loader<Cursor> onCreateLoader(int id, Bundle args) { + setContentShown(false); + + switch (id) { + case LOADER_ID_DATABASE: { + Uri baseUri = KeyRings.buildUnifiedKeyRingUri(mDataUri); + return new CursorLoader(getActivity(), baseUri, TRUST_PROJECTION, null, null, null); + } + // decided to just use an AsyncTask for keybase, but maybe later + default: + return null; + } + } + + public void onLoadFinished(Loader<Cursor> loader, Cursor data) { + /* TODO better error handling? May cause problems when a key is deleted, + * because the notification triggers faster than the activity closes. + */ + // Avoid NullPointerExceptions... + if (data.getCount() == 0) { + return; + } + + boolean nothingSpecial = true; + StringBuilder message = new StringBuilder(); + + // Swap the new cursor in. (The framework will take care of closing the + // old cursor once we return.) + if (data.moveToFirst()) { + + if (data.getInt(INDEX_UNIFIED_HAS_ANY_SECRET) != 0) { + message.append(getString(R.string.key_trust_it_is_yours)).append("\n"); + nothingSpecial = false; + } else if (data.getInt(INDEX_VERIFIED) != 0) { + message.append(getString(R.string.key_trust_already_verified)).append("\n"); + nothingSpecial = false; + } + + // If this key is revoked, don’t trust it! + if (data.getInt(INDEX_TRUST_IS_REVOKED) != 0) { + message.append(getString(R.string.key_trust_revoked)). + append(getString(R.string.key_trust_old_keys)); + + nothingSpecial = false; + } else { + Date expiryDate = new Date(data.getLong(INDEX_TRUST_EXPIRY) * 1000); + if (!data.isNull(INDEX_TRUST_EXPIRY) && expiryDate.before(new Date())) { + + // if expired, don’t trust it! + message.append(getString(R.string.key_trust_expired)). + append(getString(R.string.key_trust_old_keys)); + + nothingSpecial = false; + } + } + + if (nothingSpecial) { + message.append(getString(R.string.key_trust_maybe)); + } + + final byte[] fp = data.getBlob(INDEX_TRUST_FINGERPRINT); + final String fingerprint = KeyFormattingUtils.convertFingerprintToHex(fp); + if (fingerprint != null) { + + mStartSearch.setEnabled(true); + mStartSearch.setOnClickListener(new View.OnClickListener() { + @Override + public void onClick(View view) { + mStartSearch.setEnabled(false); + new DescribeKey().execute(fingerprint); + } + }); + } + } + + mTrustReadout.setText(message); + setContentShown(true); + } + + /** + * This is called when the last Cursor provided to onLoadFinished() above is about to be closed. + * We need to make sure we are no longer using it. + */ + public void onLoaderReset(Loader<Cursor> loader) { + // no-op in this case I think + } + + class ResultPage { + String mHeader; + final List<CharSequence> mProofs; + + public ResultPage(String header, List<CharSequence> proofs) { + mHeader = header; + mProofs = proofs; + } + } + + // look for evidence from keybase in the background, make tabular version of result + // + private class DescribeKey extends AsyncTask<String, Void, ResultPage> { + + @Override + protected ResultPage doInBackground(String... args) { + String fingerprint = args[0]; + + final ArrayList<CharSequence> proofList = new ArrayList<CharSequence>(); + final Hashtable<Integer, ArrayList<Proof>> proofs = new Hashtable<Integer, ArrayList<Proof>>(); + try { + User keybaseUser = User.findByFingerprint(fingerprint); + for (Proof proof : keybaseUser.getProofs()) { + Integer proofType = proof.getType(); + appendIfOK(proofs, proofType, proof); + } + + // a one-liner in a modern programming language + for (Integer proofType : proofs.keySet()) { + Proof[] x = {}; + Proof[] proofsFor = proofs.get(proofType).toArray(x); + if (proofsFor.length > 0) { + SpannableStringBuilder ssb = new SpannableStringBuilder(); + ssb.append(getProofNarrative(proofType)).append(" "); + + int i = 0; + while (i < proofsFor.length - 1) { + appendProofLinks(ssb, fingerprint, proofsFor[i]); + ssb.append(", "); + i++; + } + appendProofLinks(ssb, fingerprint, proofsFor[i]); + proofList.add(ssb); + } + } + + } catch (KeybaseException ignored) { + } + + return new ResultPage(getString(R.string.key_trust_results_prefix), proofList); + } + + private SpannableStringBuilder appendProofLinks(SpannableStringBuilder ssb, final String fingerprint, final Proof proof) throws KeybaseException { + int startAt = ssb.length(); + String handle = proof.getHandle(); + ssb.append(handle); + ssb.setSpan(new URLSpan(proof.getServiceUrl()), startAt, startAt + handle.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); + if (haveProofFor(proof.getType())) { + ssb.append("\u00a0["); + startAt = ssb.length(); + String verify = getString(R.string.keybase_verify); + ssb.append(verify); + ClickableSpan clicker = new ClickableSpan() { + @Override + public void onClick(View view) { + verify(proof, fingerprint); + } + }; + ssb.setSpan(clicker, startAt, startAt + verify.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); + ssb.append("]"); + } + return ssb; + } + + @Override + protected void onPostExecute(ResultPage result) { + super.onPostExecute(result); + if (result.mProofs.isEmpty()) { + result.mHeader = getActivity().getString(R.string.key_trust_no_cloud_evidence); + } + + mStartSearch.setVisibility(View.GONE); + mReportHeader.setVisibility(View.VISIBLE); + mProofListing.setVisibility(View.VISIBLE); + mReportHeader.setText(result.mHeader); + + int rowNumber = 1; + for (CharSequence s : result.mProofs) { + TableRow row = (TableRow) mInflater.inflate(R.layout.view_key_keybase_proof, null); + TextView number = (TextView) row.findViewById(R.id.proof_number); + TextView text = (TextView) row.findViewById(R.id.proof_text); + number.setText(Integer.toString(rowNumber++) + ". "); + text.setText(s); + text.setMovementMethod(LinkMovementMethod.getInstance()); + mProofListing.addView(row); + } + + // mSearchReport.loadDataWithBaseURL("file:///android_res/drawable/", s, "text/html", "UTF-8", null); + } + } + + private String getProofNarrative(int proofType) { + int stringIndex; + switch (proofType) { + case Proof.PROOF_TYPE_TWITTER: stringIndex = R.string.keybase_narrative_twitter; break; + case Proof.PROOF_TYPE_GITHUB: stringIndex = R.string.keybase_narrative_github; break; + case Proof.PROOF_TYPE_DNS: stringIndex = R.string.keybase_narrative_dns; break; + case Proof.PROOF_TYPE_WEB_SITE: stringIndex = R.string.keybase_narrative_web_site; break; + case Proof.PROOF_TYPE_HACKERNEWS: stringIndex = R.string.keybase_narrative_hackernews; break; + case Proof.PROOF_TYPE_COINBASE: stringIndex = R.string.keybase_narrative_coinbase; break; + case Proof.PROOF_TYPE_REDDIT: stringIndex = R.string.keybase_narrative_reddit; break; + default: stringIndex = R.string.keybase_narrative_unknown; + } + return getActivity().getString(stringIndex); + } + + private void appendIfOK(Hashtable<Integer, ArrayList<Proof>> table, Integer proofType, Proof proof) throws KeybaseException { + ArrayList<Proof> list = table.get(proofType); + if (list == null) { + list = new ArrayList<Proof>(); + table.put(proofType, list); + } + list.add(proof); + } + + // which proofs do we have working verifiers for? + private boolean haveProofFor(int proofType) { + switch (proofType) { + case Proof.PROOF_TYPE_TWITTER: return true; + case Proof.PROOF_TYPE_GITHUB: return true; + case Proof.PROOF_TYPE_DNS: return true; + case Proof.PROOF_TYPE_WEB_SITE: return true; + case Proof.PROOF_TYPE_HACKERNEWS: return true; + case Proof.PROOF_TYPE_COINBASE: return true; + case Proof.PROOF_TYPE_REDDIT: return true; + default: return false; + } + } + + private void verify(final Proof proof, final String fingerprint) { + Intent intent = new Intent(getActivity(), KeychainIntentService.class); + Bundle data = new Bundle(); + intent.setAction(KeychainIntentService.ACTION_VERIFY_KEYBASE_PROOF); + + data.putString(KeychainIntentService.KEYBASE_PROOF, proof.toString()); + data.putString(KeychainIntentService.KEYBASE_REQUIRED_FINGERPRINT, fingerprint); + intent.putExtra(KeychainIntentService.EXTRA_DATA, data); + + mProofVerifyDetail.setVisibility(View.GONE); + + // Create a new Messenger for the communication back after proof work is done + // + KeychainIntentServiceHandler handler = new KeychainIntentServiceHandler(getActivity(), + getString(R.string.progress_verifying_signature), ProgressDialog.STYLE_HORIZONTAL) { + public void handleMessage(Message message) { + // handle messages by standard KeychainIntentServiceHandler first + super.handleMessage(message); + + if (message.arg1 == KeychainIntentServiceHandler.MESSAGE_OKAY) { + Bundle returnData = message.getData(); + String msg = returnData.getString(KeychainIntentServiceHandler.DATA_MESSAGE); + SpannableStringBuilder ssb = new SpannableStringBuilder(); + + if ((msg != null) && msg.equals("OK")) { + + //yay + String proofUrl = returnData.getString(KeychainIntentServiceHandler.KEYBASE_PROOF_URL); + String presenceUrl = returnData.getString(KeychainIntentServiceHandler.KEYBASE_PRESENCE_URL); + String presenceLabel = returnData.getString(KeychainIntentServiceHandler.KEYBASE_PRESENCE_LABEL); + + String proofLabel; + switch (proof.getType()) { + case Proof.PROOF_TYPE_TWITTER: + proofLabel = getString(R.string.keybase_twitter_proof); + break; + case Proof.PROOF_TYPE_DNS: + proofLabel = getString(R.string.keybase_dns_proof); + break; + case Proof.PROOF_TYPE_WEB_SITE: + proofLabel = getString(R.string.keybase_web_site_proof); + break; + case Proof.PROOF_TYPE_GITHUB: + proofLabel = getString(R.string.keybase_github_proof); + break; + case Proof.PROOF_TYPE_REDDIT: + proofLabel = getString(R.string.keybase_reddit_proof); + break; + default: + proofLabel = getString(R.string.keybase_a_post); + break; + } + + ssb.append(getString(R.string.keybase_proof_succeeded)); + StyleSpan bold = new StyleSpan(Typeface.BOLD); + ssb.setSpan(bold, 0, ssb.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); + ssb.append("\n\n"); + int length = ssb.length(); + ssb.append(proofLabel); + if (proofUrl != null) { + URLSpan postLink = new URLSpan(proofUrl); + ssb.setSpan(postLink, length, length + proofLabel.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); + } + if (Proof.PROOF_TYPE_DNS == proof.getType()) { + ssb.append(" ").append(getString(R.string.keybase_for_the_domain)).append(" "); + } else { + ssb.append(" ").append(getString(R.string.keybase_fetched_from)).append(" "); + } + length = ssb.length(); + URLSpan presenceLink = new URLSpan(presenceUrl); + ssb.append(presenceLabel); + ssb.setSpan(presenceLink, length, length + presenceLabel.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); + if (Proof.PROOF_TYPE_REDDIT == proof.getType()) { + ssb.append(", "). + append(getString(R.string.keybase_reddit_attribution)). + append(" “").append(proof.getHandle()).append("”, "); + } + ssb.append(" ").append(getString(R.string.keybase_contained_signature)); + } else { + // verification failed! + msg = returnData.getString(KeychainIntentServiceHandler.DATA_ERROR); + ssb.append(getString(R.string.keybase_proof_failure)); + if (msg == null) { + msg = getString(R.string.keybase_unknown_proof_failure); + } + StyleSpan bold = new StyleSpan(Typeface.BOLD); + ssb.setSpan(bold, 0, ssb.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); + ssb.append("\n\n").append(msg); + } + mProofVerifyHeader.setVisibility(View.VISIBLE); + mProofVerifyDetail.setVisibility(View.VISIBLE); + mProofVerifyDetail.setMovementMethod(LinkMovementMethod.getInstance()); + mProofVerifyDetail.setText(ssb); + } + } + }; + + // Create a new Messenger for the communication back + Messenger messenger = new Messenger(handler); + intent.putExtra(KeychainIntentService.EXTRA_MESSENGER, messenger); + + // show progress dialog + handler.showProgressDialog(getActivity()); + + // start service with intent + getActivity().startService(intent); + } +} |