gnupg: Dirmngr LOOKUP

 
 3.6.1 Return the certificate(s) found
 -------------------------------------
 
 Lookup certificate.  To allow multiple patterns (which are ORed) quoting
 is required: Spaces are to be translated into "+" or into "%20";
 obviously this requires that the usual escape quoting rules are applied.
 The server responds with:
 
        S: D <DER encoded certificate>
        S: END
        S: D <second DER encoded certificate>
        S: END
        S: OK
 
    In this example 2 certificates are returned.  The server may return
 any number of certificates; OK will also be returned when no
 certificates were found.  The dirmngr might return a status line
 
        S: S TRUNCATED <n>
 
    To indicate that the output was truncated to N items due to a
 limitation of the server or by an arbitrary set limit.
 
    The option '--url' may be used if instead of a search pattern a
 complete URL to the certificate is known:
 
        C: LOOKUP --url CN%3DWerner%20Koch,o%3DIntevation%20GmbH,c%3DDE?userCertificate
 
    If the option '--cache-only' is given, no external lookup is done so
 that only certificates from the cache are returned.
 
    With the option '--single', the first and only the first match will
 be returned.  Unless option '--cache-only' is also used, no local lookup
 will be done in this case.