Block xor, length 0
mbedtls_xor:0

Block xor, length 1
mbedtls_xor:1

Block xor, length 3
mbedtls_xor:3

Block xor, length 4
mbedtls_xor:4

Block xor, length 7
mbedtls_xor:7

Block xor, length 8
mbedtls_xor:8

Block xor, length 16
mbedtls_xor:16