OpenSSL's multiprecision integer arithmetic
Crypt::OpenSSL::Bignum provides access to OpenSSL multiprecision integer
arithmetic libraries. Presently, many though not all of the arithmetic
operations that OpenSSL provides are exposed to perl. In addition, this
module can be used to provide access to bignum values produced by other
OpenSSL modules, such as key parameters from Crypt::OpenSSL::RSA.