The latest stable XML Security Library version is 1.2.22:
The previous releases are also available.
The XML Security Library requires:
and one of the following cryptographic libraries:
Installation (source archive)
All steps are usual:
gunzip -c xmlsec1-xxx.tar.gz | tar xvf -
./configure [possible options]
The last step is optional and requires Internet connection to execute
XML Security Library is available from the GitHub.