XTS-AES128 and XTS-AES256 modes are supported in this implementation.
Attention
The bit-width of the interfaces provided is shown as follows:
| plaintext | ciphertext | cipherkey | IV | textlength | |
| CBC-AES128 | 128 | 128 | 128 | 128 | 64 |
| CBC-AES256 | 128 | 128 | 256 | 128 | 64 |
The algorithm flow chart is shown as follows:
As seen from the chart, the dependency of XTS encryption flow only exists between the first block and the second to last block. It is same as shown in the XTS decryption flow. Therefore, the initiation interval (II) of XTS encryption and decryption mode can achieve 1. One one-word AES encryption module is instanced in XTS decryption.