certs: various improvements

* recognize self-certifications
* save signature type
* save expiry time
* drop encoded data blob from db

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainContract.java

@@ -55,13 +55,13 @@ public class KeychainContract {
     }
 
     interface CertsColumns {
-        String MASTER_KEY_ID = "master_key_id"; // verified id, foreign key to key_rings._ID
-        String RANK = "rank"; // rank of verified key
-        String KEY_ID_CERTIFIER = "key_id_certifier"; // verifying id, not a database id
+        String MASTER_KEY_ID = "master_key_id";
+        String RANK = "rank";
+        String KEY_ID_CERTIFIER = "key_id_certifier";
+        String TYPE = "type";
+        String VERIFIED = "verified";
         String CREATION = "creation";
         String EXPIRY = "expiry";
-        String VERIFIED = "verified";
-        String KEY_DATA = "key_data"; // certification blob
     }
 
     interface ApiAppsColumns {
@@ -262,6 +262,9 @@ public class KeychainContract {
         public static final String USER_ID = UserIdsColumns.USER_ID;
         public static final String SIGNER_UID = "signer_user_id";
 
+        public static final int VERIFIED_SECRET = 1;
+        public static final int VERIFIED_SELF = 2;
+
         public static final Uri CONTENT_URI = BASE_CONTENT_URI_INTERNAL.buildUpon()
                 .appendPath(BASE_KEY_RINGS).build();
 

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainDatabase.java

@@ -110,11 +110,11 @@ public class KeychainDatabase extends SQLiteOpenHelper {
                 + CertsColumns.RANK + " INTEGER, " // rank of certified uid
 
                 + CertsColumns.KEY_ID_CERTIFIER + " INTEGER, " // certifying key
+                + CertsColumns.TYPE + " INTEGER, "
+                + CertsColumns.VERIFIED + " INTEGER, "
                 + CertsColumns.CREATION + " INTEGER, "
                 + CertsColumns.EXPIRY + " INTEGER, "
-                + CertsColumns.VERIFIED + " INTEGER, "
 
-                + CertsColumns.KEY_DATA + " BLOB,"
                 + "PRIMARY KEY(" + CertsColumns.MASTER_KEY_ID + ", " + CertsColumns.RANK + ", "
                     + CertsColumns.KEY_ID_CERTIFIER + "), "
                 + "FOREIGN KEY(" + CertsColumns.MASTER_KEY_ID + ") REFERENCES "

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainProvider.java

@@ -439,10 +439,10 @@ public class KeychainProvider extends ContentProvider {
                 projectionMap.put(Certs._ID, Tables.CERTS + ".oid AS " + Certs._ID);
                 projectionMap.put(Certs.MASTER_KEY_ID, Tables.CERTS + "." + Certs.MASTER_KEY_ID);
                 projectionMap.put(Certs.RANK, Tables.CERTS + "." + Certs.RANK);
+                projectionMap.put(Certs.VERIFIED, Tables.CERTS + "." + Certs.VERIFIED);
+                projectionMap.put(Certs.TYPE, Tables.CERTS + "." + Certs.TYPE);
                 projectionMap.put(Certs.CREATION, Tables.CERTS + "." + Certs.CREATION);
                 projectionMap.put(Certs.KEY_ID_CERTIFIER, Tables.CERTS + "." + Certs.KEY_ID_CERTIFIER);
-                projectionMap.put(Certs.VERIFIED, Tables.CERTS + "." + Certs.VERIFIED);
-                projectionMap.put(Certs.KEY_DATA, Tables.CERTS + "." + Certs.KEY_DATA);
                 projectionMap.put(Certs.USER_ID, Tables.USER_IDS + "." + UserIds.USER_ID);
                 projectionMap.put(Certs.SIGNER_UID, "signer." + UserIds.USER_ID + " AS " + Certs.SIGNER_UID);
                 qb.setProjectionMap(projectionMap);

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/provider/ProviderHelper.java

@@ -29,6 +29,8 @@ import android.database.DatabaseUtils;
 import android.net.Uri;
 import android.os.RemoteException;
 
+import org.spongycastle.bcpg.SignatureSubpacketTags;
+import org.spongycastle.bcpg.sig.SignatureExpirationTime;
 import org.spongycastle.openpgp.PGPException;
 import org.spongycastle.openpgp.PGPSecretKey;
 import org.spongycastle.openpgp.operator.jcajce.JcaPGPContentVerifierBuilderProvider;
@@ -231,22 +233,37 @@ public class ProviderHelper {
         for (String userId : new IterableIterator<String>(masterKey.getUserIDs())) {
             operations.add(buildUserIdOperations(context, masterKeyId, userId, userIdRank));
 
+            // HashMap<Long, PGPSignature> certs = new HashMap<Long,PGPSignature>();
+
             // look through signatures for this specific key
             for (PGPSignature cert : new IterableIterator<PGPSignature>(
                     masterKey.getSignaturesForID(userId))) {
                 long certId = cert.getKeyID();
-                boolean verified = false;
-                // do verify signatures from our own private keys
-                if(allKeyRings.containsKey(certId)) try {
-                    // mark them as verified
-                    cert.init(
-                            new JcaPGPContentVerifierBuilderProvider().setProvider(
+                int verified = 0;
+                // verify from the key itself
+                try {
+                    // verify signatures from known private keys
+                    if(allKeyRings.containsKey(certId)) {
+                        // mark them as verified
+                        cert.init(
+                                new JcaPGPContentVerifierBuilderProvider().setProvider(
+                                        Constants.BOUNCY_CASTLE_PROVIDER_NAME),
+                                allKeyRings.get(certId).getPublicKey());
+                        verified = cert.verifyCertification(userId,  masterKey) ? Certs.VERIFIED_SECRET : 0;
+                        Log.d(Constants.TAG, "Verified sig for " + userId + " " + verified + " from "
+                                + PgpKeyHelper.convertKeyIdToHex(certId)
+                        );
+                    // if that didn't work out, is it at least an own signature?
+                    } else if(certId == masterKeyId) {
+                        cert.init(
+                                new JcaPGPContentVerifierBuilderProvider().setProvider(
                                     Constants.BOUNCY_CASTLE_PROVIDER_NAME),
-                            allKeyRings.get(certId).getPublicKey());
-                    verified = cert.verifyCertification(userId,  masterKey);
-                    Log.d(Constants.TAG, "Verified sig for " + userId + " " + verified + " from "
-                            + PgpKeyHelper.convertKeyIdToHex(cert.getKeyID())
-                    );
+                                masterKey);
+                        verified = cert.verifyCertification(userId,  masterKey) ? Certs.VERIFIED_SELF : 0;
+                        Log.d(Constants.TAG, "Verified sig for " + userId + " " + verified + " from "
+                                + PgpKeyHelper.convertKeyIdToHex(certId)
+                        );
+                    }
                 } catch(SignatureException e) {
                     Log.e(Constants.TAG, "Signature verification failed! "
                             + PgpKeyHelper.convertKeyIdToHex(masterKey.getKeyID())
@@ -263,7 +280,7 @@ public class ProviderHelper {
                 );
                 // regardless of verification, save the certification
                 operations.add(buildCertOperations(
-                        context, masterKeyId, userIdRank, masterKey.getKeyID(), cert, verified));
+                        context, masterKeyId, userIdRank, cert, verified));
             }
 
             ++userIdRank;
@@ -354,18 +371,21 @@ public class ProviderHelper {
     private static ContentProviderOperation buildCertOperations(Context context,
                                                                      long masterKeyId,
                                                                      int rank,
-                                                                     long keyId,
                                                                      PGPSignature cert,
-                                                                     boolean verified)
+                                                                     int verified)
             throws IOException {
         ContentValues values = new ContentValues();
         values.put(Certs.MASTER_KEY_ID, masterKeyId);
         values.put(Certs.RANK, rank);
         values.put(Certs.KEY_ID_CERTIFIER, cert.getKeyID());
+        values.put(Certs.TYPE, cert.getSignatureType());
         values.put(Certs.CREATION, cert.getCreationTime().getTime() / 1000);
-        values.put(Certs.EXPIRY, (String) null); // TODO
+        if(cert.getHashedSubPackets().hasSubpacket(SignatureSubpacketTags.EXPIRE_TIME)) {
+            long ext = ((SignatureExpirationTime) cert.getHashedSubPackets().getSubpacket(
+                    SignatureSubpacketTags.EXPIRE_TIME)).getTime();
+            values.put(Certs.EXPIRY, cert.getCreationTime().getTime() / 1000 + ext);
+        }
         values.put(Certs.VERIFIED, verified);
-        values.put(Certs.KEY_DATA, cert.getEncoded());
 
         Uri uri = Certs.buildCertsUri(Long.toString(masterKeyId));
 

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewCertActivity.java

@@ -57,7 +57,7 @@ public class ViewCertActivity extends ActionBarActivity
             Certs.CREATION,
             Certs.KEY_ID_CERTIFIER,
             Certs.SIGNER_UID,
-            Certs.KEY_DATA
+            Certs.TYPE
     };
     private static final int INDEX_MASTER_KEY_ID = 1;
     private static final int INDEX_USER_ID = 2;
@@ -65,6 +65,7 @@ public class ViewCertActivity extends ActionBarActivity
     private static final int INDEX_KEY_ID_CERTIFIER = 4;
     private static final int INDEX_UID_CERTIFIER = 5;
     private static final int INDEX_KEY_DATA = 6;
+    private static final int INDEX_KEY_TYPE = 6;
 
     private Uri mDataUri;
 

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/ViewKeyUserIdsAdapter.java

@@ -30,6 +30,7 @@ import android.widget.TextView;
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.pgp.PgpKeyHelper;
 import org.sufficientlysecure.keychain.provider.KeychainContract.UserIds;
+import org.sufficientlysecure.keychain.provider.KeychainContract.Certs;
 
 import java.util.ArrayList;
 
@@ -108,12 +109,12 @@ public class ViewKeyUserIdsAdapter extends CursorAdapter {
 
         int verified = cursor.getInt(mVerifiedId);
         // TODO introduce own resources for this :)
-        if(verified == 1)
+        if(verified == Certs.VERIFIED_SECRET)
             vVerified.setImageResource(android.R.drawable.presence_online);
-        else if(verified > 1)
-            vVerified.setImageResource(android.R.drawable.presence_away);
-        else
+        else if(verified == Certs.VERIFIED_SELF)
             vVerified.setImageResource(android.R.drawable.presence_invisible);
+        else
+            vVerified.setImageResource(android.R.drawable.presence_busy);
 
         // don't care further if checkboxes aren't shown
         if (mCheckStates == null) {