/usr/lib/R/site-library/openssl/doc/ is in r-cran-openssl 1.0.1-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/R/site-library/openssl/doc/bignum.R
/usr/lib/R/site-library/openssl/doc/bignum.Rmd
/usr/lib/R/site-library/openssl/doc/bignum.html
/usr/lib/R/site-library/openssl/doc/crypto_hashing.R
/usr/lib/R/site-library/openssl/doc/crypto_hashing.Rmd
/usr/lib/R/site-library/openssl/doc/crypto_hashing.html
/usr/lib/R/site-library/openssl/doc/index.html
/usr/lib/R/site-library/openssl/doc/keys.R
/usr/lib/R/site-library/openssl/doc/keys.Rmd
/usr/lib/R/site-library/openssl/doc/keys.html
/usr/lib/R/site-library/openssl/doc/secure_rng.R
/usr/lib/R/site-library/openssl/doc/secure_rng.Rmd
/usr/lib/R/site-library/openssl/doc/secure_rng.html