/usr/lib/mysql-testsuite/std_data/crl-server-key.pem is in mysql-testsuite-5.6 5.6.16-1~exp1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | -----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
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