This file is indexed.

/usr/share/crypto++/TestData/cast128v.dat is in libcrypto++-utils 5.6.1-6+deb8u3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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01 23 45 67 12 34 56 78 23 45 67 89 34 56 78 9A
01 23 45 67 89 AB CD EF
23 8B 4F E5 84 7E 44 B2

01 23 45 67 12 34 56 78 23 45
01 23 45 67 89 AB CD EF
EB 6A 71 1A 2C 02 27 1B

01 23 45 67 12
01 23 45 67 89 AB CD EF
7A C8 16 D1 6E 9B 30 2E