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sig.go
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sig.go
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// Copyright 2015 Keybase, Inc. All rights reserved. Use of
// this source code is governed by the included BSD license.
//
// Similar to libkb/kbsigs.go, but for teams sigs.
//
package teams
import (
"crypto/sha256"
"encoding/hex"
"errors"
"strings"
"github.com/keybase/client/go/libkb"
keybase1 "github.com/keybase/client/go/protocol/keybase1"
jsonw "github.com/keybase/go-jsonw"
)
func TeamRootSig(me *libkb.User, key libkb.GenericKey, teamSection SCTeamSection) (*jsonw.Wrapper, error) {
ret, err := libkb.ProofMetadata{
Me: me,
LinkType: libkb.LinkTypeTeamRoot,
SigningKey: key,
Seqno: 1,
SigVersion: libkb.KeybaseSignatureV2,
SeqType: libkb.SeqTypeSemiprivate,
}.ToJSON(me.G())
if err != nil {
return nil, err
}
teamSectionJSON, err := jsonw.WrapperFromObject(teamSection)
if err != nil {
return nil, err
}
teamSectionJSON.SetValueAtPath("per_team_key.reverse_sig", jsonw.NewNil())
body := ret.AtKey("body")
body.SetKey("team", teamSectionJSON)
return ret, nil
}
func RootTeamIDFromName(n keybase1.TeamName) keybase1.TeamID {
if !n.IsRootTeam() {
panic("can't get a team ID from a subteam")
}
return RootTeamIDFromNameString(n.String())
}
// the first 15 bytes of the sha256 of the lowercase team name, followed by the byte 0x24, encoded as hex
func RootTeamIDFromNameString(name string) keybase1.TeamID {
sum := sha256.Sum256([]byte(strings.ToLower(name)))
idBytes := sum[0:16]
idBytes[15] = libkb.RootTeamIDTag
return keybase1.TeamID(hex.EncodeToString(idBytes))
}
func NewSubteamSig(me *libkb.User, key libkb.GenericKey, parentTeam *TeamSigChainState, subteamName keybase1.TeamName, subteamID keybase1.TeamID, admin *SCTeamAdmin) (*jsonw.Wrapper, error) {
prevLinkID, err := libkb.ImportLinkID(parentTeam.GetLatestLinkID())
if err != nil {
return nil, err
}
ret, err := libkb.ProofMetadata{
Me: me,
LinkType: libkb.LinkTypeNewSubteam,
SigningKey: key,
SigVersion: libkb.KeybaseSignatureV2,
SeqType: libkb.SeqTypeSemiprivate,
Seqno: parentTeam.GetLatestSeqno() + 1,
PrevLinkID: prevLinkID,
}.ToJSON(me.G())
if err != nil {
return nil, err
}
teamSection := SCTeamSection{
ID: (SCTeamID)(parentTeam.GetID()),
Subteam: &SCSubteam{
ID: (SCTeamID)(subteamID),
Name: (SCTeamName)(subteamName.String()),
},
Admin: admin,
}
teamSectionJSON, err := jsonw.WrapperFromObject(teamSection)
if err != nil {
return nil, err
}
ret.SetValueAtPath("body.team", teamSectionJSON)
return ret, nil
}
func SubteamHeadSig(me *libkb.User, key libkb.GenericKey, subteamTeamSection SCTeamSection) (*jsonw.Wrapper, error) {
ret, err := libkb.ProofMetadata{
Me: me,
LinkType: libkb.LinkTypeSubteamHead,
SigningKey: key,
Seqno: 1,
SigVersion: libkb.KeybaseSignatureV2,
SeqType: libkb.SeqTypeSemiprivate,
}.ToJSON(me.G())
if err != nil {
return nil, err
}
// Note that the team section here is expected to have its Parent
// subsection filled out by the caller, unlike TeamRootSig.
teamSectionJSON, err := jsonw.WrapperFromObject(subteamTeamSection)
if err != nil {
return nil, err
}
teamSectionJSON.SetValueAtPath("per_team_key.reverse_sig", jsonw.NewNil())
body := ret.AtKey("body")
body.SetKey("team", teamSectionJSON)
return ret, nil
}
func RenameSubteamSig(me *libkb.User, key libkb.GenericKey, parentTeam *TeamSigChainState, teamSection SCTeamSection) (*jsonw.Wrapper, error) {
prev, err := parentTeam.GetLatestLibkbLinkID()
if err != nil {
return nil, err
}
ret, err := libkb.ProofMetadata{
Me: me,
LinkType: libkb.LinkTypeRenameSubteam,
SigningKey: key,
Seqno: parentTeam.GetLatestSeqno() + 1,
PrevLinkID: prev,
SigVersion: libkb.KeybaseSignatureV2,
SeqType: libkb.SeqTypeSemiprivate,
}.ToJSON(me.G())
if err != nil {
return nil, err
}
teamSectionJSON, err := jsonw.WrapperFromObject(teamSection)
if err != nil {
return nil, err
}
body := ret.AtKey("body")
body.SetKey("team", teamSectionJSON)
return ret, nil
}
func RenameUpPointerSig(me *libkb.User, key libkb.GenericKey, subteam *TeamSigChainState, teamSection SCTeamSection) (*jsonw.Wrapper, error) {
prev, err := subteam.GetLatestLibkbLinkID()
if err != nil {
return nil, err
}
ret, err := libkb.ProofMetadata{
Me: me,
LinkType: libkb.LinkTypeRenameUpPointer,
SigningKey: key,
Seqno: subteam.GetLatestSeqno() + 1,
PrevLinkID: prev,
SigVersion: libkb.KeybaseSignatureV2,
SeqType: libkb.SeqTypeSemiprivate,
}.ToJSON(me.G())
if err != nil {
return nil, err
}
teamSectionJSON, err := jsonw.WrapperFromObject(teamSection)
if err != nil {
return nil, err
}
body := ret.AtKey("body")
body.SetKey("team", teamSectionJSON)
return ret, nil
}
// 15 random bytes, followed by the byte 0x25, encoded as hex
func NewSubteamID() keybase1.TeamID {
idBytes, err := libkb.RandBytesWithSuffix(16, libkb.SubteamIDTag)
if err != nil {
panic("RandBytes failed: " + err.Error())
}
return keybase1.TeamID(hex.EncodeToString(idBytes))
}
func NewInviteID() SCTeamInviteID {
b, err := libkb.RandBytesWithSuffix(16, libkb.InviteIDTag)
if err != nil {
panic("RandBytes failed: " + err.Error())
}
return SCTeamInviteID(hex.EncodeToString(b))
}
func ChangeSig(me *libkb.User, prev libkb.LinkID, seqno keybase1.Seqno, key libkb.GenericKey, teamSection SCTeamSection, linkType libkb.LinkType, merkleRoot *libkb.MerkleRoot) (*jsonw.Wrapper, error) {
if teamSection.PerTeamKey != nil {
if teamSection.PerTeamKey.ReverseSig != "" {
return nil, errors.New("ChangeMembershipSig called with PerTeamKey.ReverseSig already set")
}
}
ret, err := libkb.ProofMetadata{
Me: me,
LinkType: linkType,
SigningKey: key,
Seqno: seqno,
PrevLinkID: prev,
SigVersion: libkb.KeybaseSignatureV2,
SeqType: libkb.SeqTypeSemiprivate,
MerkleRoot: merkleRoot,
}.ToJSON(me.G())
if err != nil {
return nil, err
}
teamSectionJSON, err := jsonw.WrapperFromObject(teamSection)
if err != nil {
return nil, err
}
body := ret.AtKey("body")
body.SetKey("team", teamSectionJSON)
return ret, nil
}