mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-03 16:38:35 +08:00
STeve (Xin) Huang
84b66bd247
* Do not delete integration CAs on auth init * change to an iterator * fix lint
105 lines
3.4 KiB
Go
105 lines
3.4 KiB
Go
/*
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* Teleport
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* Copyright (C) 2024 Gravitational, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package integrationv1
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import (
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"context"
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"crypto/rand"
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"time"
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"github.com/gravitational/trace"
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"golang.org/x/crypto/ssh"
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integrationpb "github.com/gravitational/teleport/api/gen/proto/go/teleport/integration/v1"
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"github.com/gravitational/teleport/api/types"
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"github.com/gravitational/teleport/lib/auth/integration/credentials"
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"github.com/gravitational/teleport/lib/authz"
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)
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// GenerateGitHubUserCert signs a SSH certificate for GitHub integration.
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func (s *Service) GenerateGitHubUserCert(ctx context.Context, in *integrationpb.GenerateGitHubUserCertRequest) (*integrationpb.GenerateGitHubUserCertResponse, error) {
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authCtx, err := s.authorizer.Authorize(ctx)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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if !authz.HasBuiltinRole(*authCtx, string(types.RoleProxy)) {
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return nil, trace.AccessDenied("GenerateGitHubUserCert is only available to proxy services")
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}
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cert, err := s.prepareGitHubCert(in)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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caSigner, err := s.getGitHubSigner(ctx, in.Integration)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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if err := cert.SignCert(rand.Reader, caSigner); err != nil {
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return nil, trace.Wrap(err)
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}
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return &integrationpb.GenerateGitHubUserCertResponse{
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AuthorizedKey: ssh.MarshalAuthorizedKey(cert),
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}, nil
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}
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func (s *Service) prepareGitHubCert(in *integrationpb.GenerateGitHubUserCertRequest) (*ssh.Certificate, error) {
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if in.UserId == "" {
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return nil, trace.BadParameter("missing UserId for GenerateGitHubUserCert")
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}
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if in.KeyId == "" {
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return nil, trace.BadParameter("missing KeyId for GenerateGitHubUserCert")
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}
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key, _, _, _, err := ssh.ParseAuthorizedKey(in.PublicKey)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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// Sign with user ID set in id@github.com extension.
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// https://docs.github.com/en/enterprise-cloud@latest/organizations/managing-git-access-to-your-organizations-repositories/about-ssh-certificate-authorities
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now := s.clock.Now()
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cert := &ssh.Certificate{
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Key: key,
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CertType: ssh.UserCert,
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KeyId: in.KeyId,
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ValidAfter: uint64(now.Add(-time.Minute).Unix()),
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ValidBefore: uint64(now.Add(in.Ttl.AsDuration()).Unix()),
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Permissions: ssh.Permissions{
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Extensions: map[string]string{
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"id@github.com": in.UserId,
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},
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},
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}
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return cert, nil
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}
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func (s *Service) getGitHubSigner(ctx context.Context, integration string) (ssh.Signer, error) {
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ig, err := s.cache.GetIntegration(ctx, integration)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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caKeySet, err := credentials.GetGitHubCertAuthorities(ctx, ig, s.cache)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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caSigner, err := s.keyStoreManager.GetSSHSignerFromKeySet(ctx, *caKeySet)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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return caSigner, nil
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}
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