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// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package asymkey
import (
"context"
"strings"
"code.gitea.io/gitea/models/db"
"code.gitea.io/gitea/modules/log"
"github.com/keybase/go-crypto/openpgp"
)
// __________________ ________ ____ __.
// / _____/\______ \/ _____/ | |/ _|____ ___.__.
// / \ ___ | ___/ \ ___ | <_/ __ < | |
// \ \_\ \| | \ \_\ \ | | \ ___/\___ |
// \______ /|____| \______ / |____|__ \___ > ____|
// \/ \/ \/ \/\/
// _____ .___ .___
// / _ \ __| _/__| _/
// / /_\ \ / __ |/ __ |
// / | \/ /_/ / /_/ |
// \____|__ /\____ \____ |
// \/ \/ \/
// This file contains functions relating to adding GPG Keys
// addGPGKey add key, import and subkeys to database
func addGPGKey(ctx context.Context, key *GPGKey, content string) (err error) {
// Add GPGKeyImport
if err = db.Insert(ctx, &GPGKeyImport{
KeyID: key.KeyID,
Content: content,
}); err != nil {
return err
}
// Save GPG primary key.
if err = db.Insert(ctx, key); err != nil {
return err
}
// Save GPG subs key.
for _, subkey := range key.SubsKey {
if err := addGPGSubKey(ctx, subkey); err != nil {
return err
}
}
return nil
}
// addGPGSubKey add subkeys to database
func addGPGSubKey(ctx context.Context, key *GPGKey) (err error) {
// Save GPG primary key.
if err = db.Insert(ctx, key); err != nil {
return err
}
// Save GPG subs key.
for _, subkey := range key.SubsKey {
if err := addGPGSubKey(ctx, subkey); err != nil {
return err
}
}
return nil
}
// AddGPGKey adds new public key to database.
func AddGPGKey(ownerID int64, content, token, signature string) ([]*GPGKey, error) {
ekeys, err := checkArmoredGPGKeyString(content)
if err != nil {
return nil, err
}
ctx, committer, err := db.TxContext(db.DefaultContext)
if err != nil {
return nil, err
}
defer committer.Close()
keys := make([]*GPGKey, 0, len(ekeys))
verified := false
// Handle provided signature
if signature != "" {
signer, err := openpgp.CheckArmoredDetachedSignature(ekeys, strings.NewReader(token), strings.NewReader(signature))
if err != nil {
signer, err = openpgp.CheckArmoredDetachedSignature(ekeys, strings.NewReader(token+"\n"), strings.NewReader(signature))
}
if err != nil {
signer, err = openpgp.CheckArmoredDetachedSignature(ekeys, strings.NewReader(token+"\r\n"), strings.NewReader(signature))
}
if err != nil {
log.Error("Unable to validate token signature. Error: %v", err)
return nil, ErrGPGInvalidTokenSignature{
ID: ekeys[0].PrimaryKey.KeyIdString(),
Wrapped: err,
}
}
ekeys = []*openpgp.Entity{signer}
verified = true
}
if len(ekeys) > 1 {
id2key := map[string]*openpgp.Entity{}
newEKeys := make([]*openpgp.Entity, 0, len(ekeys))
for _, ekey := range ekeys {
id := ekey.PrimaryKey.KeyIdString()
if original, has := id2key[id]; has {
// Coalesce this with the other one
for _, subkey := range ekey.Subkeys {
if subkey.PublicKey == nil {
continue
}
found := false
for _, originalSubkey := range original.Subkeys {
if originalSubkey.PublicKey == nil {
continue
}
if originalSubkey.PublicKey.KeyId == subkey.PublicKey.KeyId {
found = true
break
}
}
if !found {
original.Subkeys = append(original.Subkeys, subkey)
}
}
for name, identity := range ekey.Identities {
if _, has := original.Identities[name]; has {
continue
}
original.Identities[name] = identity
}
continue
}
id2key[id] = ekey
newEKeys = append(newEKeys, ekey)
}
ekeys = newEKeys
}
for _, ekey := range ekeys {
// Key ID cannot be duplicated.
has, err := db.GetEngine(ctx).Where("key_id=?", ekey.PrimaryKey.KeyIdString()).
Get(new(GPGKey))
if err != nil {
return nil, err
} else if has {
return nil, ErrGPGKeyIDAlreadyUsed{ekey.PrimaryKey.KeyIdString()}
}
// Get DB session
key, err := parseGPGKey(ownerID, ekey, verified)
if err != nil {
return nil, err
}
if err = addGPGKey(ctx, key, content); err != nil {
return nil, err
}
keys = append(keys, key)
}
return keys, committer.Commit()
}
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