apply promote operation to specific subkeys present on yubikey only

OpenKeychain-Test/src/test/java/org/sufficientlysecure/keychain/operations/PromoteKeyOperationTest.java

@@ -41,6 +41,7 @@ import org.sufficientlysecure.keychain.provider.ProviderHelper;
 import org.sufficientlysecure.keychain.service.SaveKeyringParcel;
 import org.sufficientlysecure.keychain.service.SaveKeyringParcel.Algorithm;
 import org.sufficientlysecure.keychain.service.SaveKeyringParcel.ChangeUnlockParcel;
+import org.sufficientlysecure.keychain.support.KeyringTestingHelper;
 import org.sufficientlysecure.keychain.util.Passphrase;
 import org.sufficientlysecure.keychain.util.ProgressScaler;
 import org.sufficientlysecure.keychain.util.TestingUtils;
@@ -104,7 +105,7 @@ public class PromoteKeyOperationTest {
         PromoteKeyOperation op = new PromoteKeyOperation(Robolectric.application,
                 new ProviderHelper(Robolectric.application), null, null);
 
-        PromoteKeyResult result = op.execute(mStaticRing.getMasterKeyId(), null);
+        PromoteKeyResult result = op.execute(mStaticRing.getMasterKeyId(), null, null);
 
         Assert.assertTrue("promotion must succeed", result.success());
 
@@ -130,7 +131,7 @@ public class PromoteKeyOperationTest {
 
         byte[] aid = Hex.decode("D2760001240102000000012345670000");
 
-        PromoteKeyResult result = op.execute(mStaticRing.getMasterKeyId(), aid);
+        PromoteKeyResult result = op.execute(mStaticRing.getMasterKeyId(), aid, null);
 
         Assert.assertTrue("promotion must succeed", result.success());
 
@@ -147,4 +148,40 @@ public class PromoteKeyOperationTest {
 
         }
     }
+
+    @Test
+    public void testPromoteDivertSpecific() throws Exception {
+        PromoteKeyOperation op = new PromoteKeyOperation(Robolectric.application,
+                new ProviderHelper(Robolectric.application), null, null);
+
+        byte[] aid = Hex.decode("D2760001240102000000012345670000");
+
+        // only promote the first, rest stays dummy
+        long keyId = KeyringTestingHelper.getSubkeyId(mStaticRing, 1);
+
+        PromoteKeyResult result = op.execute(mStaticRing.getMasterKeyId(), aid, new long[] {
+            keyId
+        });
+
+        Assert.assertTrue("promotion must succeed", result.success());
+
+        {
+            CanonicalizedSecretKeyRing ring = new ProviderHelper(Robolectric.application)
+                    .getCanonicalizedSecretKeyRing(mStaticRing.getMasterKeyId());
+
+            for (CanonicalizedSecretKey key : ring.secretKeyIterator()) {
+                if (key.getKeyId() == keyId) {
+                    Assert.assertEquals("subkey must be divert-to-card",
+                            SecretKeyType.DIVERT_TO_CARD, key.getSecretKeyType());
+                    Assert.assertArrayEquals("subkey must have correct iv",
+                            aid, key.getIv());
+                } else {
+                    Assert.assertEquals("some subkeys must be gnu dummy",
+                            SecretKeyType.GNU_DUMMY, key.getSecretKeyType());
+                }
+            }
+
+        }
+    }
+
 }

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/PromoteKeyOperation.java

@@ -25,6 +25,7 @@ import org.sufficientlysecure.keychain.operations.results.OperationResult.Operat
 import org.sufficientlysecure.keychain.operations.results.PgpEditKeyResult;
 import org.sufficientlysecure.keychain.operations.results.PromoteKeyResult;
 import org.sufficientlysecure.keychain.operations.results.SaveKeyringResult;
+import org.sufficientlysecure.keychain.pgp.CanonicalizedPublicKey;
 import org.sufficientlysecure.keychain.pgp.CanonicalizedPublicKeyRing;
 import org.sufficientlysecure.keychain.pgp.Progressable;
 import org.sufficientlysecure.keychain.pgp.UncachedKeyRing;
@@ -34,6 +35,7 @@ import org.sufficientlysecure.keychain.provider.ProviderHelper.NotFoundException
 import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
 import org.sufficientlysecure.keychain.util.ProgressScaler;
 
+import java.util.Arrays;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 /** An operation which promotes a public key ring to a secret one.
@@ -50,7 +52,7 @@ public class PromoteKeyOperation extends BaseOperation {
         super(context, providerHelper, progressable, cancelled);
     }
 
-    public PromoteKeyResult execute(long masterKeyId, byte[] cardAid) {
+    public PromoteKeyResult execute(long masterKeyId, byte[] cardAid, long[] subKeyIds) {
 
         OperationLog log = new OperationLog();
         log.add(LogType.MSG_PR, 0);
@@ -65,8 +67,24 @@ public class PromoteKeyOperation extends BaseOperation {
                 CanonicalizedPublicKeyRing pubRing =
                         mProviderHelper.getCanonicalizedPublicKeyRing(masterKeyId);
 
+                if (subKeyIds == null) {
+                    log.add(LogType.MSG_PR_ALL, 1);
+                } else {
+                    // sort for binary search
+                    for (CanonicalizedPublicKey key : pubRing.publicKeyIterator()) {
+                        long subKeyId = key.getKeyId();
+                        if (naiveIndexOf(subKeyIds, subKeyId) != null) {
+                            log.add(LogType.MSG_PR_SUBKEY_MATCH, 1,
+                                    KeyFormattingUtils.convertKeyIdToHex(subKeyId));
+                        } else {
+                            log.add(LogType.MSG_PR_SUBKEY_NOMATCH, 1,
+                                    KeyFormattingUtils.convertKeyIdToHex(subKeyId));
+                        }
+                    }
+                }
+
                 // create divert-to-card secret key from public key
-                promotedRing = pubRing.createDivertSecretRing(cardAid);
+                promotedRing = pubRing.createDivertSecretRing(cardAid, subKeyIds);
 
             } catch (NotFoundException e) {
                 log.add(LogType.MSG_PR_ERROR_KEY_NOT_FOUND, 2);
@@ -106,4 +124,13 @@ public class PromoteKeyOperation extends BaseOperation {
 
     }
 
+    static private Integer naiveIndexOf(long[] haystack, long needle) {
+        for (int i = 0; i < haystack.length; i++) {
+            if (needle == haystack[i]) {
+                return i;
+            }
+        }
+        return null;
+    }
+
 }

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/results/OperationResult.java

@@ -566,8 +566,11 @@ public abstract class OperationResult implements Parcelable {
 
         // promote key
         MSG_PR (LogLevel.START, R.string.msg_pr),
+        MSG_PR_ALL (LogLevel.DEBUG, R.string.msg_pr_all),
         MSG_PR_ERROR_KEY_NOT_FOUND (LogLevel.ERROR, R.string.msg_pr_error_key_not_found),
         MSG_PR_FETCHING (LogLevel.DEBUG, R.string.msg_pr_fetching),
+        MSG_PR_SUBKEY_MATCH (LogLevel.DEBUG, R.string.msg_pr_subkey_match),
+        MSG_PR_SUBKEY_NOMATCH (LogLevel.WARN, R.string.msg_pr_subkey_nomatch),
         MSG_PR_SUCCESS (LogLevel.OK, R.string.msg_pr_success),
 
         // messages used in UI code

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/CanonicalizedKeyRing.java

@@ -19,6 +19,7 @@
 package org.sufficientlysecure.keychain.pgp;
 
 import org.spongycastle.openpgp.PGPKeyRing;
+import org.spongycastle.openpgp.PGPPublicKey;
 import org.sufficientlysecure.keychain.pgp.exception.PgpKeyNotFoundException;
 import org.sufficientlysecure.keychain.util.IterableIterator;
 
@@ -127,7 +128,11 @@ public abstract class CanonicalizedKeyRing extends KeyRing {
     }
 
     public CanonicalizedPublicKey getPublicKey(long id) {
-        return new CanonicalizedPublicKey(this, getRing().getPublicKey(id));
+        PGPPublicKey pubKey = getRing().getPublicKey(id);
+        if (pubKey == null) {
+            return null;
+        }
+        return new CanonicalizedPublicKey(this, pubKey);
     }
 
     public byte[] getEncoded() throws IOException {

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/CanonicalizedPublicKeyRing.java

@@ -103,9 +103,22 @@ public class CanonicalizedPublicKeyRing extends CanonicalizedKeyRing {
     }
 
     /** Create a dummy secret ring from this key */
-    public UncachedKeyRing createDivertSecretRing (byte[] cardAid) {
+    public UncachedKeyRing createDivertSecretRing (byte[] cardAid, long[] subKeyIds) {
         PGPSecretKeyRing secRing = PGPSecretKeyRing.constructDummyFromPublic(getRing(), cardAid);
-        return new UncachedKeyRing(secRing);
+
+        if (subKeyIds == null) {
+            return new UncachedKeyRing(secRing);
+        }
+
+        // if only specific subkeys should be promoted, construct a
+        // stripped dummy, then move divert-to-card keys over
+        PGPSecretKeyRing newRing = PGPSecretKeyRing.constructDummyFromPublic(getRing());
+        for (long subKeyId : subKeyIds) {
+            newRing = PGPSecretKeyRing.insertSecretKey(newRing, secRing.getSecretKey(subKeyId));
+        }
+
+        return new UncachedKeyRing(newRing);
+
     }
 
 }

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/KeychainIntentService.java

@@ -65,7 +65,6 @@ import org.sufficientlysecure.keychain.util.FileHelper;
 import org.sufficientlysecure.keychain.util.InputData;
 import org.sufficientlysecure.keychain.util.Log;
 import org.sufficientlysecure.keychain.util.ParcelableFileCache;
-import org.sufficientlysecure.keychain.util.Passphrase;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
@@ -185,6 +184,7 @@ public class KeychainIntentService extends IntentService implements Progressable
     // promote key
     public static final String PROMOTE_MASTER_KEY_ID = "promote_master_key_id";
     public static final String PROMOTE_CARD_AID = "promote_card_aid";
+    public static final String PROMOTE_SUBKEY_IDS = "promote_fingerprints";
 
     // consolidate
     public static final String CONSOLIDATE_RECOVERY = "consolidate_recovery";
@@ -476,10 +476,12 @@ public class KeychainIntentService extends IntentService implements Progressable
                 // Input
                 long keyRingId = data.getLong(PROMOTE_MASTER_KEY_ID);
                 byte[] cardAid = data.getByteArray(PROMOTE_CARD_AID);
+                long[] subKeyIds = data.getLongArray(PROMOTE_SUBKEY_IDS);
 
                 // Operation
-                PromoteKeyOperation op = new PromoteKeyOperation(this, providerHelper, this, mActionCanceled);
+                PromoteKeyOperation op = new PromoteKeyOperation(
-                PromoteKeyResult result = op.execute(keyRingId, cardAid);
+                        this, providerHelper, this, mActionCanceled);
+                PromoteKeyResult result = op.execute(keyRingId, cardAid, subKeyIds);
 
                 // Result
                 sendMessageToHandler(MessageStatus.OKAY, result);

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyYubiKeyFragment.java

@@ -45,6 +45,8 @@ import org.sufficientlysecure.keychain.pgp.CanonicalizedSecretKey.SecretKeyType;
 import org.sufficientlysecure.keychain.provider.KeychainContract.Keys;
 import org.sufficientlysecure.keychain.service.KeychainIntentService;
 import org.sufficientlysecure.keychain.service.ServiceProgressHandler;
+import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
+
 
 public class ViewKeyYubiKeyFragment extends Fragment
         implements LoaderCallbacks<Cursor> {
@@ -154,6 +156,11 @@ public class ViewKeyYubiKeyFragment extends Fragment
         Bundle data = new Bundle();
         data.putLong(KeychainIntentService.PROMOTE_MASTER_KEY_ID, mMasterKeyId);
         data.putByteArray(KeychainIntentService.PROMOTE_CARD_AID, mCardAid);
+        long[] subKeyIds = new long[mFingerprints.length];
+        for (int i = 0; i < subKeyIds.length; i++) {
+            subKeyIds[i] = KeyFormattingUtils.getKeyIdFromFingerprint(mFingerprints[i]);
+        }
+        data.putLongArray(KeychainIntentService.PROMOTE_SUBKEY_IDS, subKeyIds);
         intent.putExtra(KeychainIntentService.EXTRA_DATA, data);
 
         // Create a new Messenger for the communication back
@@ -219,7 +226,7 @@ public class ViewKeyYubiKeyFragment extends Fragment
 
     }
 
-    public Integer naiveIndexOf(byte[][] haystack, byte[] needle) {
+    static private Integer naiveIndexOf(byte[][] haystack, byte[] needle) {
         for (int i = 0; i < haystack.length; i++) {
             if (Arrays.equals(needle, haystack[i])) {
                 return i;

OpenKeychain/src/main/res/values/strings.xml

@@ -1005,8 +1005,11 @@
 
     <!-- Promote key -->
     <string name="msg_pr">"Promoting public key to secret key"</string>
+    <string name="msg_pr_all">"Promoting all subkeysp"</string>
     <string name="msg_pr_error_key_not_found">"Key not found!"</string>
     <string name="msg_pr_fetching">"Fetching key to modify (%s)"</string>
+    <string name="msg_pr_subkey_match">"Promoting subkey: %s"</string>
+    <string name="msg_pr_subkey_nomatch">"Subkey not on Yubikey: %s"</string>
     <string name="msg_pr_success">"Key successfully promoted"</string>
 
     <!-- Other messages used in OperationLogs -->