117 lines
3.7 KiB
Go
117 lines
3.7 KiB
Go
// Copyright (C) 2021 Storj Labs, Inc.
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// See LICENSE for copying information.
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package main
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import (
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"strconv"
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"time"
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"github.com/zeebo/clingy"
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"github.com/zeebo/errs"
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"storj.io/storj/cmd/uplinkng/ulloc"
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"storj.io/uplink"
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)
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// accessPermissions holds flags and provides a Setup method for commands that
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// have to modify permissions on access grants.
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type accessPermissions struct {
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prefixes []uplink.SharePrefix // prefixes is the set of path prefixes that the grant will be limited to
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readonly bool // implies disallowWrites and disallowDeletes
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writeonly bool // implies disallowReads and disallowLists
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disallowDeletes bool
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disallowLists bool
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disallowReads bool
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disallowWrites bool
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notBefore time.Time
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notAfter time.Time
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}
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func (ap *accessPermissions) Setup(params clingy.Parameters) {
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transformSharePrefix := func(loc ulloc.Location) (uplink.SharePrefix, error) {
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bucket, key, ok := loc.RemoteParts()
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if !ok {
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return uplink.SharePrefix{}, errs.New("invalid prefix: must be remote: %q", loc)
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}
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return uplink.SharePrefix{
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Bucket: bucket,
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Prefix: key,
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}, nil
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}
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ap.prefixes = params.Flag("prefix", "Key prefix access will be restricted to", []ulloc.Location{},
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clingy.Transform(ulloc.Parse),
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clingy.Transform(transformSharePrefix),
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clingy.Repeated,
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).([]uplink.SharePrefix)
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ap.readonly = params.Flag("readonly", "Implies --disallow-writes and --disallow-deletes", false,
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clingy.Transform(strconv.ParseBool)).(bool)
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ap.writeonly = params.Flag("writeonly", "Implies --disallow-reads and --disallow-lists", false,
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clingy.Transform(strconv.ParseBool)).(bool)
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ap.disallowDeletes = params.Flag("disallow-deletes", "Disallow deletes with the access", false,
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clingy.Transform(strconv.ParseBool)).(bool)
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ap.disallowLists = params.Flag("disallow-lists", "Disallow lists with the access", false,
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clingy.Transform(strconv.ParseBool)).(bool)
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ap.disallowReads = params.Flag("disallow-reads", "Disallow reasd with the access", false,
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clingy.Transform(strconv.ParseBool)).(bool)
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ap.disallowWrites = params.Flag("disallow-writes", "Disallow writes with the access", false,
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clingy.Transform(strconv.ParseBool)).(bool)
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now := time.Now()
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transformHumanDate := clingy.Transform(func(date string) (time.Time, error) {
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switch {
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case date == "":
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return time.Time{}, nil
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case date == "now":
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return now, nil
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case date[0] == '+' || date[0] == '-':
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d, err := time.ParseDuration(date)
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return now.Add(d), errs.Wrap(err)
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default:
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t, err := time.Parse(time.RFC3339, date)
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return t, errs.Wrap(err)
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}
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})
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ap.notBefore = params.Flag("not-before",
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"Disallow access before this time (e.g. '+2h', 'now', '2020-01-02T15:04:05Z0700')",
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time.Time{}, transformHumanDate, clingy.Type("relative_date")).(time.Time)
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ap.notAfter = params.Flag("not-after",
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"Disallow access after this time (e.g. '+2h', 'now', '2020-01-02T15:04:05Z0700')",
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time.Time{}, transformHumanDate, clingy.Type("relative_date")).(time.Time)
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}
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func (ap *accessPermissions) Apply(access *uplink.Access) (*uplink.Access, error) {
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permission := uplink.Permission{
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AllowDelete: !ap.disallowDeletes && !ap.readonly,
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AllowList: !ap.disallowLists && !ap.writeonly,
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AllowDownload: !ap.disallowReads && !ap.writeonly,
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AllowUpload: !ap.disallowWrites && !ap.readonly,
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NotBefore: ap.notBefore,
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NotAfter: ap.notAfter,
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}
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// if we aren't actually restricting anything, then we don't need to Share.
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if permission == (uplink.Permission{
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AllowDelete: true,
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AllowList: true,
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AllowDownload: true,
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AllowUpload: true,
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}) && len(ap.prefixes) == 0 {
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return access, nil
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}
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access, err := access.Share(permission, ap.prefixes...)
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if err != nil {
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return nil, errs.Wrap(err)
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}
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return access, nil
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}
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