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https://codeberg.org/forgejo/forgejo.git
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283 lines
8.3 KiB
Go
283 lines
8.3 KiB
Go
// Copyright 2017 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package asymkey
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import (
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"context"
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"fmt"
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"strings"
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"time"
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"code.gitea.io/gitea/models/db"
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user_model "code.gitea.io/gitea/models/user"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/timeutil"
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"github.com/keybase/go-crypto/openpgp"
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"github.com/keybase/go-crypto/openpgp/packet"
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"xorm.io/xorm"
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)
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// __________________ ________ ____ __.
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// / _____/\______ \/ _____/ | |/ _|____ ___.__.
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// / \ ___ | ___/ \ ___ | <_/ __ < | |
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// \ \_\ \| | \ \_\ \ | | \ ___/\___ |
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// \______ /|____| \______ / |____|__ \___ > ____|
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// \/ \/ \/ \/\/
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// GPGKey represents a GPG key.
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type GPGKey struct {
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ID int64 `xorm:"pk autoincr"`
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OwnerID int64 `xorm:"INDEX NOT NULL"`
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KeyID string `xorm:"INDEX CHAR(16) NOT NULL"`
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PrimaryKeyID string `xorm:"CHAR(16)"`
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Content string `xorm:"MEDIUMTEXT NOT NULL"`
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CreatedUnix timeutil.TimeStamp `xorm:"created"`
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ExpiredUnix timeutil.TimeStamp
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AddedUnix timeutil.TimeStamp
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SubsKey []*GPGKey `xorm:"-"`
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Emails []*user_model.EmailAddress
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Verified bool `xorm:"NOT NULL DEFAULT false"`
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CanSign bool
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CanEncryptComms bool
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CanEncryptStorage bool
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CanCertify bool
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}
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func init() {
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db.RegisterModel(new(GPGKey))
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}
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// BeforeInsert will be invoked by XORM before inserting a record
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func (key *GPGKey) BeforeInsert() {
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key.AddedUnix = timeutil.TimeStampNow()
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}
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// AfterLoad is invoked from XORM after setting the values of all fields of this object.
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func (key *GPGKey) AfterLoad(session *xorm.Session) {
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err := session.Where("primary_key_id=?", key.KeyID).Find(&key.SubsKey)
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if err != nil {
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log.Error("Find Sub GPGkeys[%s]: %v", key.KeyID, err)
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}
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}
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// PaddedKeyID show KeyID padded to 16 characters
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func (key *GPGKey) PaddedKeyID() string {
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return PaddedKeyID(key.KeyID)
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}
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// PaddedKeyID show KeyID padded to 16 characters
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func PaddedKeyID(keyID string) string {
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if len(keyID) > 15 {
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return keyID
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}
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zeros := "0000000000000000"
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return zeros[0:16-len(keyID)] + keyID
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}
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// ListGPGKeys returns a list of public keys belongs to given user.
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func ListGPGKeys(ctx context.Context, uid int64, listOptions db.ListOptions) ([]*GPGKey, error) {
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sess := db.GetEngine(ctx).Table(&GPGKey{}).Where("owner_id=? AND primary_key_id=''", uid)
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if listOptions.Page != 0 {
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sess = db.SetSessionPagination(sess, &listOptions)
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}
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keys := make([]*GPGKey, 0, 2)
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return keys, sess.Find(&keys)
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}
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// CountUserGPGKeys return number of gpg keys a user own
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func CountUserGPGKeys(ctx context.Context, userID int64) (int64, error) {
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return db.GetEngine(ctx).Where("owner_id=? AND primary_key_id=''", userID).Count(&GPGKey{})
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}
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// GetGPGKeyByID returns public key by given ID.
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func GetGPGKeyByID(ctx context.Context, keyID int64) (*GPGKey, error) {
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key := new(GPGKey)
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has, err := db.GetEngine(ctx).ID(keyID).Get(key)
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if err != nil {
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return nil, err
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} else if !has {
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return nil, ErrGPGKeyNotExist{keyID}
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}
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return key, nil
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}
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// GetGPGKeysByKeyID returns public key by given ID.
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func GetGPGKeysByKeyID(ctx context.Context, keyID string) ([]*GPGKey, error) {
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keys := make([]*GPGKey, 0, 1)
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return keys, db.GetEngine(ctx).Where("key_id=?", keyID).Find(&keys)
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}
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// GPGKeyToEntity retrieve the imported key and the traducted entity
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func GPGKeyToEntity(ctx context.Context, k *GPGKey) (*openpgp.Entity, error) {
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impKey, err := GetGPGImportByKeyID(ctx, k.KeyID)
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if err != nil {
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return nil, err
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}
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keys, err := checkArmoredGPGKeyString(impKey.Content)
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if err != nil {
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return nil, err
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}
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return keys[0], err
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}
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// parseSubGPGKey parse a sub Key
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func parseSubGPGKey(ownerID int64, primaryID string, pubkey *packet.PublicKey, expiry time.Time) (*GPGKey, error) {
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content, err := base64EncPubKey(pubkey)
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if err != nil {
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return nil, err
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}
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return &GPGKey{
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OwnerID: ownerID,
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KeyID: pubkey.KeyIdString(),
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PrimaryKeyID: primaryID,
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Content: content,
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CreatedUnix: timeutil.TimeStamp(pubkey.CreationTime.Unix()),
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ExpiredUnix: timeutil.TimeStamp(expiry.Unix()),
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CanSign: pubkey.CanSign(),
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CanEncryptComms: pubkey.PubKeyAlgo.CanEncrypt(),
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CanEncryptStorage: pubkey.PubKeyAlgo.CanEncrypt(),
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CanCertify: pubkey.PubKeyAlgo.CanSign(),
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}, nil
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}
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// parseGPGKey parse a PrimaryKey entity (primary key + subs keys + self-signature)
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func parseGPGKey(ctx context.Context, ownerID int64, e *openpgp.Entity, verified bool) (*GPGKey, error) {
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pubkey := e.PrimaryKey
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expiry := getExpiryTime(e)
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// Parse Subkeys
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subkeys := make([]*GPGKey, len(e.Subkeys))
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for i, k := range e.Subkeys {
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subs, err := parseSubGPGKey(ownerID, pubkey.KeyIdString(), k.PublicKey, expiry)
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if err != nil {
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return nil, ErrGPGKeyParsing{ParseError: err}
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}
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subkeys[i] = subs
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}
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// Check emails
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userEmails, err := user_model.GetEmailAddresses(ctx, ownerID)
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if err != nil {
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return nil, err
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}
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emails := make([]*user_model.EmailAddress, 0, len(e.Identities))
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for _, ident := range e.Identities {
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if ident.Revocation != nil {
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continue
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}
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email := strings.ToLower(strings.TrimSpace(ident.UserId.Email))
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for _, e := range userEmails {
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if e.IsActivated && e.LowerEmail == email {
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emails = append(emails, e)
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break
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}
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}
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}
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if !verified {
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// In the case no email as been found
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if len(emails) == 0 {
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failedEmails := make([]string, 0, len(e.Identities))
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for _, ident := range e.Identities {
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failedEmails = append(failedEmails, ident.UserId.Email)
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}
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return nil, ErrGPGNoEmailFound{failedEmails, e.PrimaryKey.KeyIdString()}
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}
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}
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content, err := base64EncPubKey(pubkey)
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if err != nil {
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return nil, err
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}
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return &GPGKey{
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OwnerID: ownerID,
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KeyID: pubkey.KeyIdString(),
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PrimaryKeyID: "",
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Content: content,
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CreatedUnix: timeutil.TimeStamp(pubkey.CreationTime.Unix()),
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ExpiredUnix: timeutil.TimeStamp(expiry.Unix()),
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Emails: emails,
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SubsKey: subkeys,
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Verified: verified,
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CanSign: pubkey.CanSign(),
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CanEncryptComms: pubkey.PubKeyAlgo.CanEncrypt(),
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CanEncryptStorage: pubkey.PubKeyAlgo.CanEncrypt(),
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CanCertify: pubkey.PubKeyAlgo.CanSign(),
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}, nil
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}
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// deleteGPGKey does the actual key deletion
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func deleteGPGKey(ctx context.Context, keyID string) (int64, error) {
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if keyID == "" {
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return 0, fmt.Errorf("empty KeyId forbidden") // Should never happen but just to be sure
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}
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// Delete imported key
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n, err := db.GetEngine(ctx).Where("key_id=?", keyID).Delete(new(GPGKeyImport))
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if err != nil {
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return n, err
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}
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return db.GetEngine(ctx).Where("key_id=?", keyID).Or("primary_key_id=?", keyID).Delete(new(GPGKey))
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}
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// DeleteGPGKey deletes GPG key information in database.
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func DeleteGPGKey(ctx context.Context, doer *user_model.User, id int64) (err error) {
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key, err := GetGPGKeyByID(ctx, id)
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if err != nil {
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if IsErrGPGKeyNotExist(err) {
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return nil
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}
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return fmt.Errorf("GetPublicKeyByID: %w", err)
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}
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// Check if user has access to delete this key.
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if !doer.IsAdmin && doer.ID != key.OwnerID {
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return ErrGPGKeyAccessDenied{doer.ID, key.ID}
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}
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ctx, committer, err := db.TxContext(ctx)
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if err != nil {
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return err
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}
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defer committer.Close()
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if _, err = deleteGPGKey(ctx, key.KeyID); err != nil {
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return err
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}
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return committer.Commit()
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}
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func checkKeyEmails(ctx context.Context, email string, keys ...*GPGKey) (bool, string) {
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uid := int64(0)
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var userEmails []*user_model.EmailAddress
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var user *user_model.User
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for _, key := range keys {
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for _, e := range key.Emails {
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if e.IsActivated && (email == "" || strings.EqualFold(e.Email, email)) {
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return true, e.Email
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}
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}
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if key.Verified && key.OwnerID != 0 {
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if uid != key.OwnerID {
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userEmails, _ = user_model.GetEmailAddresses(ctx, key.OwnerID)
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uid = key.OwnerID
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user = &user_model.User{ID: uid}
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_, _ = user_model.GetUser(ctx, user)
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}
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for _, e := range userEmails {
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if e.IsActivated && (email == "" || strings.EqualFold(e.Email, email)) {
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return true, e.Email
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}
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}
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if user.KeepEmailPrivate && strings.EqualFold(email, user.GetEmail()) {
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return true, user.GetEmail()
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}
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}
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}
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return false, email
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}
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