3 Each of the *.in files is XER-decoded, then converted into DER,
4 then decoded back from DER, then encoded into XER again,
5 and finally compared to the original encoding.
9 *-B.in - The file is intentionally (B)roken
10 *-D.in - Reconstructing should yield (D)ifferent data
11 *-E.in - CXER reconstruction should yield byte-wise identical data.
12 *-X.in - CXER reconstruction should yield non-identical data.
14 Otherwise, a reconstructed buffer should loosely match the original.