Function validatedCreds

server/user.go:408–482

validatedCreds returns the list of validated credentials including those validated in this call. Returns all validated methods including those validated earlier and now. Returns either a full set of tags or nil for tags if tags are unchanged.

(uid types.Uid, authLvl auth.Level, creds []MsgCredClient,
	errorOnFail bool)

// Returns all validated methods including those validated earlier and now.
// Returns either a full set of tags or nil for tags if tags are unchanged.
func validatedCreds(uid types.Uid, authLvl auth.Level, creds []MsgCredClient,
	errorOnFail bool) ([]string, []string, error) {
	// Check if credential validation is required.
	if len(globals.authValidators[authLvl]) == 0 {
		return nil, nil, nil
	}

	// Get all validated methods
	allCreds, err := store.Users.GetAllCreds(uid, "", true)
	if err != nil {
		return nil, nil, err
	}

	methods := make(map[string]struct{})
	for i := range allCreds {
		methods[allCreds[i].Method] = struct{}{}
	}

	// Add credentials which are validated in this call.
	// Unknown validators are removed.
	creds = normalizeCredentials(creds, false)
	var tagsToAdd []string
	for i := range creds {
		cr := &creds[i]
		if cr.Response == "" {
			// Ignore empty response.
			continue
		}

		vld := store.Store.GetValidator(cr.Method) // No need to check for nil, unknown methods are removed earlier.
		value, err := vld.Check(uid, cr.Response)

		if err != nil {
			// Check failed.
			if storeErr, ok := err.(types.StoreError); ok && storeErr == types.ErrCredentials {
				if errorOnFail {
					// Report invalid response.
					return nil, nil, types.ErrInvalidResponse
				}
				// Skip invalid response. Keep credential unvalidated.
				continue
			}
			// Actual error. Report back.
			return nil, nil, err
		}

		// Check did not return an error: the request was successfully validated.
		methods[cr.Method] = struct{}{}

		// Add validated credential to user's tags.
		if globals.validators[cr.Method].addToTags {
			tagsToAdd = append(tagsToAdd, cr.Method+":"+value)
		}
	}

	var tags []string
	if len(tagsToAdd) > 0 {
		// Save update to tags