# facho-signer


## guia

- http://xmlsoft.org/html/libxml-tree.html
- http://xmlsoft.org/html/libxml-xpath.html
- http://xmlsoft.org/examples/xpath1.c
- http://xmlsoft.org/tutorial/ar01s05.html
- https://www.aleksey.com/xmlsec/api/xmlsec-reference.html
- https://zakird.com/2013/10/13/certificate-parsing-with-openssl