in oss-20190517/src/main/java/com/aliyun/sdk/service/oss20190517/encryption/internal/CryptoModuleBase.java [330:335]
private void checkMultipartPartSize(Long partSize) {
Validate.paramNotNull(partSize, "PartSize");
if (partSize <= 0 || 0 != (partSize % CryptoScheme.BLOCK_SIZE)) {
throw new IllegalArgumentException("PartSize is not 16 bytes alignment.");
}
}