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seitan_invitelink.go
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seitan_invitelink.go
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package teams
import (
"context"
cryptorand "crypto/rand"
"fmt"
"regexp"
"strings"
"github.com/keybase/client/go/libkb"
"github.com/keybase/client/go/msgpack"
keybase1 "github.com/keybase/client/go/protocol/keybase1"
)
// documented in go/teams/seitan.go
const SeitanEncodedIKeyInvitelinkLength = 28
const seitanEncodedIKeyInvitelinkPlusOffset = 7
func GenerateSeitanIKeyInvitelink() (ikey keybase1.SeitanIKeyInvitelink, err error) {
str, err := generateIKey(SeitanEncodedIKeyInvitelinkLength, seitanEncodedIKeyInvitelinkPlusOffset)
if err != nil {
return ikey, err
}
return keybase1.SeitanIKeyInvitelink(str), nil
}
func ParseIKeyInvitelinkFromString(token string) (ikey keybase1.SeitanIKeyInvitelink, err error) {
if len(token) != SeitanEncodedIKeyInvitelinkLength {
return ikey, fmt.Errorf("invalid token length: expected %d characters, got %d", SeitanEncodedIKeyLength, len(token))
}
return keybase1.SeitanIKeyInvitelink(strings.ToLower(token)), nil
}
type SeitanSIKeyInvitelink [SeitanScryptKeylen]byte
func GenerateSIKeyInvitelink(ikey keybase1.SeitanIKeyInvitelink) (sikey SeitanSIKeyInvitelink, err error) {
buf, err := generateSIKey(ikey.String())
if err != nil {
return sikey, err
}
copy(sikey[:], buf)
return sikey, nil
}
func (sikey SeitanSIKeyInvitelink) generateMsgpackPayload() ([]byte, error) {
return msgpack.Encode(NewSeitanInviteIDPayload(SeitanVersionInvitelink))
}
func (sikey SeitanSIKeyInvitelink) GenerateTeamInviteID() (id SCTeamInviteID, err error) {
payload, err := sikey.generateMsgpackPayload()
if err != nil {
return id, err
}
return generateTeamInviteID(sikey[:], payload)
}
func (sikey SeitanSIKeyInvitelink) GenerateShortTeamInviteID() (id SCTeamInviteIDShort, err error) {
payload, err := sikey.generateMsgpackPayload()
if err != nil {
return id, err
}
return generateShortTeamInviteID(sikey[:], payload)
}
func generatePackedEncryptedKeyWithSecretKeyInvitelink(ikey keybase1.SeitanIKeyInvitelink,
secretKey keybase1.Bytes32, gen keybase1.PerTeamKeyGeneration, nonce keybase1.BoxNonce,
label keybase1.SeitanKeyLabel) (pkey SeitanPKey, encoded string, err error) {
var keyAndLabel keybase1.SeitanKeyAndLabelInvitelink
keyAndLabel.I = ikey
keyAndLabel.L = label
packedKeyAndLabel, err := msgpack.Encode(keybase1.NewSeitanKeyAndLabelWithInvitelink(keyAndLabel))
if err != nil {
return pkey, encoded, err
}
return packAndEncryptKeyWithSecretKey(secretKey, gen, nonce, packedKeyAndLabel, SeitanVersionInvitelink)
}
func GeneratePackedEncryptedKeyInvitelink(ctx context.Context, ikey keybase1.SeitanIKeyInvitelink,
team *Team, label keybase1.SeitanKeyLabel) (pkey SeitanPKey, encoded string, err error) {
appKey, err := team.SeitanInviteTokenKeyLatest(ctx)
if err != nil {
return pkey, encoded, err
}
var nonce keybase1.BoxNonce
if _, err = cryptorand.Read(nonce[:]); err != nil {
return pkey, encoded, err
}
return generatePackedEncryptedKeyWithSecretKeyInvitelink(ikey, appKey.Key,
appKey.KeyGeneration, nonce, label)
}
func GenerateSeitanInvitelinkAcceptanceKey(sikey []byte, uid keybase1.UID, eldestSeqno keybase1.Seqno, unixTimestampSeconds int64) (akey SeitanAKey, encoded string, err error) {
type AKeyPayload struct {
Stage string `codec:"stage" json:"stage"`
UID keybase1.UID `codec:"uid" json:"uid"`
EldestSeqno keybase1.Seqno `codec:"eldest_seqno" json:"eldest_seqno"`
CTime int64 `codec:"ctime" json:"ctime"`
Version SeitanVersion `codec:"version" json:"version"`
}
akeyPayload, err := msgpack.Encode(AKeyPayload{
Stage: "accept",
UID: uid,
EldestSeqno: eldestSeqno,
CTime: unixTimestampSeconds,
Version: SeitanVersionInvitelink,
})
if err != nil {
return akey, encoded, err
}
return generateAcceptanceKey(akeyPayload, sikey)
}
// bound from SeitanEncodedIKeyInvitelinkLength
var invitelinkIKeyRxx = regexp.MustCompile(`/i/t/([a-zA-Z0-9]{16,28})#([a-z0-9+]{16,28})`)
func generateInvitelinkURLPrefix(mctx libkb.MetaContext) string {
// NOTE: if you change this url, change invitelinkIKeyRxx too!
return fmt.Sprintf("%s/i/t/", libkb.SiteURILookup[mctx.G().Env.GetRunMode()])
}
func GenerateInvitelinkURL(
mctx libkb.MetaContext,
ikey keybase1.SeitanIKeyInvitelink,
id SCTeamInviteIDShort,
) string {
return fmt.Sprintf("%s%s#%s", generateInvitelinkURLPrefix(mctx), id, ikey)
}
type TeamInviteLinkDetails struct {
libkb.AppStatusEmbed
InviterResetOrDel bool `json:"inviter_reset_or_del"`
InviterUID keybase1.UID `json:"inviter_uid"`
InviterUsername string `json:"inviter_username"`
IsMember bool `json:"is_member"`
TeamAvatars map[keybase1.AvatarFormat]keybase1.AvatarUrl `json:"team_avatars"`
TeamDescription string `json:"team_desc"`
TeamID keybase1.TeamID `json:"team_id"`
TeamIsOpen bool `json:"team_is_open"`
TeamName string `json:"team_name"`
TeamNumMembers int `json:"team_num_members"`
}
func GetInviteLinkDetails(mctx libkb.MetaContext, inviteID keybase1.TeamInviteID) (info keybase1.InviteLinkDetails, err error) {
arg := libkb.APIArg{
Endpoint: "team/get_invite_details",
SessionType: libkb.APISessionTypeOPTIONAL,
Args: libkb.HTTPArgs{
"invite_id": libkb.S{Val: string(inviteID)},
},
}
var resp TeamInviteLinkDetails
if err = mctx.G().API.GetDecode(mctx, arg, &resp); err != nil {
// The server knows about invite IDs (but not keys), so it is fine to
// put this in the log.
mctx.Debug("GetInviteLinkDetails: failed to get team invite details for %v: %s", inviteID, err)
return info, err
}
teamName, err := keybase1.TeamNameFromString(resp.TeamName)
if err != nil {
return info, err
}
return keybase1.InviteLinkDetails{
InviteID: inviteID,
InviterResetOrDel: resp.InviterResetOrDel,
InviterUID: resp.InviterUID,
InviterUsername: resp.InviterUsername,
IsMember: resp.IsMember,
TeamAvatars: resp.TeamAvatars,
TeamDesc: resp.TeamDescription,
TeamID: resp.TeamID,
TeamIsOpen: resp.TeamIsOpen,
TeamName: teamName,
TeamNumMembers: resp.TeamNumMembers,
}, nil
}