Building IMSI support for encryption. (57befa76) · Commits · e / os / android_frameworks_opt_telephony

src/java/com/android/internal/telephony/CarrierInfoManager.java

+57 −15

Original line number	Diff line number	Diff line
		@@ -38,30 +38,30 @@ public class CarrierInfoManager {
		/**
		* Returns Carrier specific information that will be used to encrypt the IMSI and IMPI.
		* @param keyType whether the key is being used for WLAN or ePDG.
		* @param mContext
		* @param context
		* @return ImsiEncryptionInfo which contains the information, including the public key, to be
		* used for encryption.
		*/
		public static ImsiEncryptionInfo getCarrierInfoForImsiEncryption(int keyType,
		Context mContext) {
		Context context) {
		String mcc = "";
		String mnc = "";
		final TelephonyManager telephonyManager =
		(TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
		String networkOperator = telephonyManager.getNetworkOperator();
		if (!TextUtils.isEmpty(networkOperator)) {
		mcc = networkOperator.substring(0, 3);
		mnc = networkOperator.substring(3);
		(TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
		String simOperator = telephonyManager.getSimOperator();
		if (!TextUtils.isEmpty(simOperator)) {
		mcc = simOperator.substring(0, 3);
		mnc = simOperator.substring(3);
		Log.i(LOG_TAG, "using values for mnc, mcc: " + mnc + "," + mcc);
		} else {
		Log.e(LOG_TAG, "Invalid networkOperator: " + networkOperator);
		Log.e(LOG_TAG, "Invalid networkOperator: " + simOperator);
		return null;
		}
		Cursor findCursor = null;
		try {
		// In the current design, MVNOs are not supported. If we decide to support them,
		// we'll need to add to this CL.
		ContentResolver mContentResolver = mContext.getContentResolver();
		ContentResolver mContentResolver = context.getContentResolver();
		String[] columns = {Telephony.CarrierColumns.PUBLIC_KEY,
		Telephony.CarrierColumns.EXPIRATION_TIME,
		Telephony.CarrierColumns.KEY_IDENTIFIER};
		@@ -95,12 +95,12 @@ public class CarrierInfoManager {
		/**
		* Inserts or update the Carrier Key in the database
		* @param imsiEncryptionInfo ImsiEncryptionInfo object.
		* @param mContext Context.
		* @param context Context.
		*/
		public static void updateOrInsertCarrierKey(ImsiEncryptionInfo imsiEncryptionInfo,
		Context mContext) {
		Context context) {
		byte[] keyBytes = imsiEncryptionInfo.getPublicKey().getEncoded();
		ContentResolver mContentResolver = mContext.getContentResolver();
		ContentResolver mContentResolver = context.getContentResolver();
		// In the current design, MVNOs are not supported. If we decide to support them,
		// we'll need to add to this CL.
		ContentValues contentValues = new ContentValues();
		@@ -150,12 +150,54 @@ public class CarrierInfoManager {
		* {@link java.security.PublicKey} and the Key Identifier.
		* The keyIdentifier Attribute value pair that helps a server locate
		* the private key to decrypt the permanent identity.
		* @param mContext Context.
		* @param context Context.
		*/
		public static void setCarrierInfoForImsiEncryption(ImsiEncryptionInfo imsiEncryptionInfo,
		Context mContext) {
		Context context) {
		Log.i(LOG_TAG, "inserting carrier key: " + imsiEncryptionInfo);
		updateOrInsertCarrierKey(imsiEncryptionInfo, mContext);
		updateOrInsertCarrierKey(imsiEncryptionInfo, context);
		//todo send key to modem. Will be done in a subsequent CL.
		}

		/**
		* Deletes all the keys for a given Carrier from the device keystore.
		* @param context Context
		*/
		public static void deleteCarrierInfoForImsiEncryption(Context context) {
		Log.i(LOG_TAG, "deleting carrier key from db");
		String mcc = "";
		String mnc = "";
		final TelephonyManager telephonyManager =
		(TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
		String simOperator = telephonyManager.getSimOperator();
		if (!TextUtils.isEmpty(simOperator)) {
		mcc = simOperator.substring(0, 3);
		mnc = simOperator.substring(3);
		} else {
		Log.e(LOG_TAG, "Invalid networkOperator: " + simOperator);
		return;
		}
		ContentResolver mContentResolver = context.getContentResolver();
		try {
		String whereClause = "mcc=? and mnc=?";
		String[] whereArgs = new String[] { mcc, mnc };
		mContentResolver.delete(Telephony.CarrierColumns.CONTENT_URI, whereClause, whereArgs);
		} catch (Exception e) {
		Log.e(LOG_TAG, "Delete failed" + e);
		}
		}

		/**
		* Deletes all the keys from the device keystore.
		* @param context Context
		*/
		public static void deleteAllCarrierKeysForImsiEncryption(Context context) {
		Log.i(LOG_TAG, "deleting ALL carrier keys from db");
		ContentResolver mContentResolver = context.getContentResolver();
		try {
		mContentResolver.delete(Telephony.CarrierColumns.CONTENT_URI, null, null);
		} catch (Exception e) {
		Log.e(LOG_TAG, "Delete failed" + e);
		}
		}
		}
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