There exists multiple signers.

One is the Time Stamp Signer generating RFC 3161 compliant time-stamps.

An MRTD signer creating "Machine Reader Travel Document" signatures using the RSA algorithm from pre-padded data and another is the MRTD SOD Signer which creates the complete Security Object (SOd) by signing the datagroups for the passport.

There are also signers for automatically signing of specific document-types such as PDF, XML, ODF and OOXML and there is a general purpose signer that can sign any document-type and produces the output in Cryptographic Message Syntax (CMS).