Initializing help system before first use

# x509getinfo

Purpose
Retrieve information stored in an X509 certificate.
Synopsis
`function x509getinfo(x509:string, info:array(string) of text):integer`
Arguments

x509 | Certificate file in PEM format
info | Array where to store certificate information

Return value
Number of items stored in the array or -1 in case of error.
Example
The example below shows how to display the properties of a certificate:

    declarations
     info:array(S:set of string) of text
    end-declarations

    if x509getinfo("srv.crt",info)<1 then
     writeln("Failed to load certificate")
    else
     forall(s in S | exists(info(s)))
      writeln("   ", s, ":", info(s))
    end-if

Further information
This function retrieves some of the information recorded in an X509 certificate. The data is recorded in the provided array indexed by the labels of the records in the certificate. The possible labels are:

Version | Format version of the certificate
Serial | Serial number
Issuer | Issuer of the certificate
Subject | Entity associated to the public key stored in the certificate
NotBefore | Valid after this date
NotAfter | Valid until this date
SgnAlg | Algorithm used to sign the certificate

A self-signed certificate (such as those created with x509newcrt) will have identical values for Issuer and Subject.
Related topics
x509check
Module
mmssl
Parent Topic Procedures and functions

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