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6ec5cb02cb
This detangles the gRPC client code from the userdata code. The motivation behind this is to make creating clients more simple and not dependent on our configuration format. Signed-off-by: Andrew Rynhard <andrew@andrewrynhard.com>
86 lines
2.2 KiB
Go
86 lines
2.2 KiB
Go
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package tls
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import (
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"context"
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"crypto/tls"
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"net"
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"github.com/pkg/errors"
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"github.com/talos-systems/talos/pkg/crypto/x509"
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"github.com/talos-systems/talos/pkg/grpc/gen"
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)
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type renewingRemoteCertificateProvider struct {
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embeddableCertificateProvider
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generator *gen.RemoteGenerator
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}
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// NewRemoteRenewingFileCertificateProvider returns a new CertificateProvider
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// which manages and updates its certificates from the security API.
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func NewRemoteRenewingFileCertificateProvider(token string, endpoints []string, port int, hostname string, ips []net.IP) (CertificateProvider, error) {
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g, err := gen.NewRemoteGenerator(token, endpoints, port)
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if err != nil {
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return nil, errors.Wrap(err, "failed to create TLS generator")
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}
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provider := &renewingRemoteCertificateProvider{
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generator: g,
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}
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provider.embeddableCertificateProvider = embeddableCertificateProvider{
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hostname: hostname,
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ips: ips,
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updateFunc: provider.update,
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}
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var (
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ca []byte
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cert tls.Certificate
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)
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if ca, cert, err = provider.updateFunc(); err != nil {
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return nil, errors.Wrap(err, "failed to create initial certificate")
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}
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if err = provider.UpdateCertificates(ca, &cert); err != nil {
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return nil, err
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}
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// nolint: errcheck
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go provider.manageUpdates(context.Background())
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return provider, nil
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}
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// nolint: dupl
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func (p *renewingRemoteCertificateProvider) update() (ca []byte, cert tls.Certificate, err error) {
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var (
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crt []byte
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csr *x509.CertificateSigningRequest
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identity *x509.PEMEncodedCertificateAndKey
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)
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csr, identity, err = x509.NewCSRAndIdentity(p.hostname, p.ips)
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if err != nil {
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return nil, cert, err
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}
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if ca, crt, err = p.generator.Identity(csr); err != nil {
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return nil, cert, errors.Wrap(err, "failed to generate identity")
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}
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identity.Crt = crt
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cert, err = tls.X509KeyPair(identity.Crt, identity.Key)
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if err != nil {
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return nil, cert, errors.Wrap(err, "failed to parse cert and key into a TLS Certificate")
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}
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return ca, cert, nil
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}
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