(draft) sii_crypto: functions for dealing with XML and "certificado digital"

[glarrain]

See LibreDTE's PHP class sasco\LibreDTE\FirmaElectronica with methods:

• open a PKCS #12 file (.pfx or .p12)
• getID: "Método que entrega el RUN/RUT asociado al certificado"
• get issuer
• get (subject's) name and email address
• get expiration, total duration, days until expiration, etc.
• extract private key
• extract certificate
• sign and signXML
• verify and verifyXML