private static byte[] generateApkSigningBlock(byte[] apkSignatureSchemeV2Block) { // FORMAT: // uint64: size (excluding this field) // repeated ID-value pairs: // uint64: size (excluding this field) // uint32: ID // (size - 4) bytes: value // uint64: size (same as the one above) // uint128: magic int resultSize = 8 // size + 8 + 4 + apkSignatureSchemeV2Block.length // v2Block as ID-value pair + 8 // size + 16 // magic ; ByteBuffer result = ByteBuffer.allocate(resultSize); result.order(ByteOrder.LITTLE_ENDIAN); long blockSizeFieldValue = resultSize - 8; result.putLong(blockSizeFieldValue); long pairSizeFieldValue = 4 + apkSignatureSchemeV2Block.length; result.putLong(pairSizeFieldValue); result.putInt(APK_SIGNATURE_SCHEME_V2_BLOCK_ID); result.put(apkSignatureSchemeV2Block); result.putLong(blockSizeFieldValue); result.put(APK_SIGNING_BLOCK_MAGIC); return result.array(); }
@Override public OutputApkSigningBlockRequest outputZipSections( DataSource zipEntries, DataSource zipCentralDirectory, DataSource zipEocd) throws IOException, InvalidKeyException, SignatureException, NoSuchAlgorithmException { checkNotClosed(); checkV1SigningDoneIfEnabled(); if (!mV2SigningEnabled) { return null; } invalidateV2Signature(); byte[] apkSigningBlock = V2SchemeSigner.generateApkSigningBlock( zipEntries, zipCentralDirectory, zipEocd, mV2SignerConfigs); mAddV2SignatureRequest = new OutputApkSigningBlockRequestImpl(apkSigningBlock); return mAddV2SignatureRequest; }
return generateApkSigningBlock(signerConfigs, contentDigests);