r-cran-openssl - 2.0.5+dfsg-1 main

Bindings to OpenSSL libssl and libcrypto, plus custom SSH pubkey
parsers. Supports RSA, DSA and NIST curves P-256, P-384 and P-521.
Cryptographic signatures can either be created and verified manually or
via x509 certificates. AES block cipher is used in CBC mode for
symmetric encryption; RSA for asymmetric (public key) encryption. High-
level envelope functions combine RSA and AES for encrypting arbitrary
sized data. Other utilities include key generators, hash functions (md5,
sha1, sha256, etc), base64 encoder, a secure random number generator,
and 'bignum' math methods for manually performing crypto calculations on
large multibyte integers.