This is a port of EME for Go.
EME (ECB-Mix-ECB or, clearer, Encrypt-Mix-Encrypt) is a wide-block encryption mode developed by Halevi and Rogaway in 2003.
EME uses multiple invocations of a block cipher to construct a new cipher of bigger block size (in multiples of 16 bytes, up to 2048 bytes).
Quoting from the original paper:
We describe a block-cipher mode of operation, EME, that turns an n-bit block cipher into a tweakable enciphering scheme that acts on strings of mn bits, where m ∈ [1..n]. The mode is parallelizable, but as serial-efficient as the non-parallelizable mode CMC [6]. EME can be used to solve the disk-sector encryption problem. The algorithm entails two layers of ECB encryption and a “lightweight mixing” in between. We prove EME secure, in the reduction-based sense of modern cryptography.
This is an implementation of EME in Java, complete with test vectors from IEEE and Halevi.
It has no dependencies outside the standard library.
implementation("com.github.alexey-lapin:eme-java:0.1.2")
<dependency>
<groupId>com.github.alexey-lapin</groupId>
<artifactId>eme-java</artifactId>
<version>0.1.2</version>
</dependency>