Make checksum and header checks decoder dependent. (eeeec21b) · Commits · e / os / android_packages_inputmethods_LatinIME

java-overridable/src/com/android/inputmethod/latin/define/DecoderSpecificConstants.java

+3 −0

Original line number	Diff line number	Diff line
		@@ -30,4 +30,7 @@ public class DecoderSpecificConstants {

		public static final String DECODER_DICT_SUFFIX = "";

		public static final boolean SHOULD_VERIFY_MAGIC_NUMBER = true;
		public static final boolean SHOULD_VERIFY_CHECKSUM = true;
		public static final boolean SHOULD_USE_DICT_VERSION = true;
		}

java/src/com/android/inputmethod/dictionarypack/MetadataDbHelper.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -48,7 +48,7 @@ public class MetadataDbHelper extends SQLiteOpenHelper {
		private static final int METADATA_DATABASE_VERSION_WITH_CLIENTID = 6;
		// The current database version.
		// This MUST be increased every time the dictionary pack metadata URL changes.
		private static final int CURRENT_METADATA_DATABASE_VERSION = 11;
		private static final int CURRENT_METADATA_DATABASE_VERSION = 12;

		private final static long NOT_A_DOWNLOAD_ID = -1;

java/src/com/android/inputmethod/latin/BinaryDictionaryFileDumper.java

+22 −9

Original line number	Diff line number	Diff line
		@@ -29,6 +29,7 @@ import android.util.Log;

		import com.android.inputmethod.dictionarypack.DictionaryPackConstants;
		import com.android.inputmethod.dictionarypack.MD5Calculator;
		import com.android.inputmethod.latin.define.DecoderSpecificConstants;
		import com.android.inputmethod.latin.utils.DictionaryInfoUtils;
		import com.android.inputmethod.latin.utils.DictionaryInfoUtils.DictionaryInfo;
		import com.android.inputmethod.latin.utils.FileTransforms;
		@@ -67,6 +68,11 @@ public final class BinaryDictionaryFileDumper {
		private static final byte[] MAGIC_NUMBER_VERSION_2 =
		new byte[] { (byte)0x9B, (byte)0xC1, (byte)0x3A, (byte)0xFE };

		private static final boolean SHOULD_VERIFY_MAGIC_NUMBER =
		DecoderSpecificConstants.SHOULD_VERIFY_MAGIC_NUMBER;
		private static final boolean SHOULD_VERIFY_CHECKSUM =
		DecoderSpecificConstants.SHOULD_VERIFY_CHECKSUM;

		private static final String DICTIONARY_PROJECTION[] = { "id" };

		private static final String QUERY_PARAMETER_MAY_PROMPT_USER = "mayPrompt";
		@@ -302,13 +308,18 @@ public final class BinaryDictionaryFileDumper {
		checkMagicAndCopyFileTo(bufferedInputStream, bufferedOutputStream);
		bufferedOutputStream.flush();
		bufferedOutputStream.close();

		if (SHOULD_VERIFY_CHECKSUM) {
		final String actualRawChecksum = MD5Calculator.checksum(
		new BufferedInputStream(new FileInputStream(outputFile)));
		Log.i(TAG, "Computed checksum for downloaded dictionary. Expected = " + rawChecksum
		+ " ; actual = " + actualRawChecksum);
		Log.i(TAG, "Computed checksum for downloaded dictionary. Expected = "
		+ rawChecksum + " ; actual = " + actualRawChecksum);
		if (!TextUtils.isEmpty(rawChecksum) && !rawChecksum.equals(actualRawChecksum)) {
		throw new IOException("Could not decode the file correctly : checksum differs");
		throw new IOException(
		"Could not decode the file correctly : checksum differs");
		}
		}

		final File finalFile = new File(finalFileName);
		finalFile.delete();
		if (!outputFile.renameTo(finalFile)) {
		@@ -444,11 +455,13 @@ public final class BinaryDictionaryFileDumper {
		if (readMagicNumberSize < length) {
		throw new IOException("Less bytes to read than the magic number length");
		}
		if (SHOULD_VERIFY_MAGIC_NUMBER) {
		if (!Arrays.equals(MAGIC_NUMBER_VERSION_2, magicNumberBuffer)) {
		if (!Arrays.equals(MAGIC_NUMBER_VERSION_1, magicNumberBuffer)) {
		throw new IOException("Wrong magic number for downloaded file");
		}
		}
		}
		output.write(magicNumberBuffer);

		// Actually copy the file

java/src/com/android/inputmethod/latin/BinaryDictionaryGetter.java

+8 −0

Original line number	Diff line number	Diff line
		@@ -22,6 +22,7 @@ import android.content.res.AssetFileDescriptor;
		import android.util.Log;

		import com.android.inputmethod.latin.common.LocaleUtils;
		import com.android.inputmethod.latin.define.DecoderSpecificConstants;
		import com.android.inputmethod.latin.makedict.DictionaryHeader;
		import com.android.inputmethod.latin.makedict.UnsupportedFormatException;
		import com.android.inputmethod.latin.utils.BinaryDictionaryUtils;
		@@ -54,6 +55,9 @@ final public class BinaryDictionaryGetter {
		*/
		private static final String COMMON_PREFERENCES_NAME = "LatinImeDictPrefs";

		private static final boolean SHOULD_USE_DICT_VERSION =
		DecoderSpecificConstants.SHOULD_USE_DICT_VERSION;

		// Name of the category for the main dictionary
		public static final String MAIN_DICTIONARY_CATEGORY = "main";
		public static final String ID_CATEGORY_SEPARATOR = ":";
		@@ -224,6 +228,10 @@ final public class BinaryDictionaryGetter {
		// those do not include whitelist entries, the new code with an old version of the dictionary
		// would lose whitelist functionality.
		private static boolean hackCanUseDictionaryFile(final File file) {
		if (!SHOULD_USE_DICT_VERSION) {
		return true;
		}

		try {
		// Read the version of the file
		final DictionaryHeader header = BinaryDictionaryUtils.getHeader(file);

java/src/com/android/inputmethod/latin/makedict/FormatSpec.java

+3 −1

Original line number	Diff line number	Diff line
		@@ -172,6 +172,8 @@ public final class FormatSpec {
		public static final int VERSION2 = 2;
		public static final int VERSION201 = 201;
		public static final int VERSION202 = 202;
		// format version for Fava
		public static final int VERSION300 = 300;
		public static final int MINIMUM_SUPPORTED_VERSION_OF_CODE_POINT_TABLE = VERSION201;
		// Dictionary version used for testing.
		public static final int VERSION4_ONLY_FOR_TESTING = 399;
		@@ -180,7 +182,7 @@ public final class FormatSpec {
		public static final int VERSION4 = VERSION403;
		public static final int VERSION4_DEV = VERSION403;
		public static final int MINIMUM_SUPPORTED_STATIC_VERSION = VERSION202;
		public static final int MAXIMUM_SUPPORTED_STATIC_VERSION = VERSION202;
		public static final int MAXIMUM_SUPPORTED_STATIC_VERSION = VERSION300;
		static final int MINIMUM_SUPPORTED_DYNAMIC_VERSION = VERSION4;
		static final int MAXIMUM_SUPPORTED_DYNAMIC_VERSION = VERSION4_DEV;