LDAPJS Server: when searching, I need to request in lowercase attributes in order to get mixed-case attributes

[mgx0]

i have a function that generates LDAP User object from data received from Keycloak and sends it via search response. commented are problematic:

const fabricatedObject = {
      dn: 'uid=' + keycloakUser.username + ',ou=' + keycloakUser.attributes.ou + ',o=organization',
      attributes: {
        objectClass: ['person', 'top', 'organizationalPerson', 'inetOrgPerson', 'posixAccount'], // PROBLEMATIC
        cn: keycloakUser.firstName + ' ' + keycloakUser.lastName,
        displayName: keycloakUser.firstName + ' ' + keycloakUser.lastName, // PROBLEMATIC
        givenName: keycloakUser.firstName, // PROBLEMATIC
        sn: keycloakUser.lastName,
        ou: (keycloakUser.attributes.ou || "none"),
        mail: keycloakUser.email.toString(),
        uid: keycloakUser.username.toString(),
        entryUUID: keycloakUser.attributes.LDAP_ID || keycloakUser.id, // PROBLEMATIC
        keycloakId: keycloakUser.id.toString(), // PROBLEMATIC
        ldapId: (keycloakUser.attributes.LDAP_ID || "none").toString() // PROBLEMATIC
      },

this does not return entryUUID nor ldapId (applies for all bold marked above):
ldapsearch -H ldap://localhost:10389 -x -b o=organization -D BINDUSER -w BINDPASS "(uid=*)" "mail" "entryUUID" "ldapId"

but this does (and mixed-case entryUUID and ldapId is received:
ldapsearch -H ldap://localhost:10389 -x -b o=organization -D BINDUSER -w BINDPASS "(uid=*)" "mail" "entryuuid" "ldapid"

the point is, that specifying exact case of "entryUUID" is wrong. I have to ask for lowercase "entryuuid" in order to receive attribute "entryUUID" with it's value

this is easily fixable, can I offer a quick PR for this? I believe it's not intended behaviour, as clients shall be able to use upper or lowercase attribute names.
LDAP Attributes are case insensitive, so I believe searching for "ENTRYUUID", "entryuuid" and "entryUUID" shall always return the entryUUID that's defined in the generator function above.

[mgx0]

two commented lines resolve this problem. file search_response.js, starting line 57

Object.keys(entry.attributes).forEach(function (a) {
      const _a = a.toLowerCase()
      const lowerCaseAttributes = self.attributes.map(attr => attr.toLowerCase()) // create an array of lowercase attributes
      if (!nofiltering && _a.length && _a[0] === '_') {
        savedAttrs[a] = entry.attributes[a]
        delete entry.attributes[a]
      } else if (!nofiltering && self.notAttributes.indexOf(_a) !== -1) {
        savedAttrs[a] = entry.attributes[a]
        delete entry.attributes[a]
      } else if (all) {
        // do nothing
      } else if (self.attributes.length && lowerCaseAttributes.indexOf(_a) === -1) { // compare lowercase to lowercase to make sure we don't remove attribute only because of different case
        savedAttrs[a] = entry.attributes[a]
        delete entry.attributes[a]
      }
    })