The AiCA is the CA (Certification Authority) Package.

This package contains several applications, such as:
  * aica     -- The CA program to issue, update, and revoke certificates.
                And many other CA managements are available.
  * certreq  -- To generate a key pair and a CSR.
  * certview -- The PKI file viewer for X.509 Certificate, CRL, PKCS#1, PKCS#7,
                PKCS#8, PKCS#10, and PKCS#12. Both PEM and DER file format
                is available to show.
  * certconv -- The PKI file converter. Many PKI files can convert to the other
                file format mutually.
  * certvfy  -- The certificate verifier. Full verification is possible.