(WIP) Change password when key is stripped #1692

Approach:
Find the first unstripped secret key and use it for passphrase verification
All unstripped keys will have their passphrase changed to new passphrase, if possible.

Current Progress:
Changing the passphrase of keys works fine.
Refactoring to combine "modifySecretKeyring" and newly added method, "modifyKeyRingPassword"
may be possible if given the go-ahead.

1 files changed, 64 insertions, 0 deletions

diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/PassphraseChangeParcel.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/PassphraseChangeParcel.java
new file mode 100644
index 000000000..8b08aa115
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/PassphraseChangeParcel.java
@@ -0,0 +1,64 @@
+package org.sufficientlysecure.keychain.service;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+public class PassphraseChangeParcel implements Parcelable {
+
+    // the master key id to be edited.
+    public Long mMasterKeyId;
+    // the first sub key id that is not stripped.
+    public Long mValidSubkeyId;
+    // the key fingerprint, for safety.
+    public byte[] mFingerprint;
+
+    public ChangeUnlockParcel mNewUnlock;
+
+
+    public PassphraseChangeParcel(long masterKeyId, byte[] fingerprint) {
+        mMasterKeyId = masterKeyId;
+        mFingerprint = fingerprint;
+    }
+
+    public PassphraseChangeParcel(Parcel source) {
+        mValidSubkeyId = source.readInt() != 0 ? source.readLong() : null;
+        mMasterKeyId = source.readLong();
+        mFingerprint = source.createByteArray();
+
+        mNewUnlock = source.readParcelable(getClass().getClassLoader());
+    }
+
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel destination, int flags) {
+        destination.writeInt(mValidSubkeyId == null ? 0 : 1);
+        if (mValidSubkeyId != null) {
+            destination.writeLong(mValidSubkeyId);
+        }
+        destination.writeLong(mMasterKeyId);
+        destination.writeByteArray(mFingerprint);
+        destination.writeParcelable(mNewUnlock, flags);
+    }
+
+    public static final Creator<PassphraseChangeParcel> CREATOR = new Creator<PassphraseChangeParcel>() {
+        public PassphraseChangeParcel createFromParcel(final Parcel source) {
+            return new PassphraseChangeParcel(source);
+        }
+
+        public PassphraseChangeParcel[] newArray(final int size) {
+            return new PassphraseChangeParcel[size];
+        }
+    };
+
+    public String toString() {
+        String out = "mMasterKeyId: " + mMasterKeyId + "\n";
+        out += "mNewUnlock: " + mNewUnlock + "\n";
+
+        return out;
+    }
+}