• Crypt::OpenSSL::X509 (Crypt::OpenSSL::X509)

Установка FreeBSD.

 #  cd /usr/ports/security/p5-Crypt-OpenSSL-X509/ && make  && make install

Установка Ubuntu, Debian

# apt-get install libcrypt-openssl-x509-perl

Установка с CPAN

# perl -MCPAN -e shell 
install Crypt::OpenSSL::X509