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55 lines
1.8 KiB
Go
55 lines
1.8 KiB
Go
// Copyright 2022 Google LLC.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package cert contains certificate tools for Google API clients.
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// This package is intended to be used with crypto/tls.Config.GetClientCertificate.
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//
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// The certificates can be used to satisfy Google's Endpoint Validation.
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// See https://cloud.google.com/endpoint-verification/docs/overview
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//
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// This package is not intended for use by end developers. Use the
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// google.golang.org/api/option package to configure API clients.
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package cert
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import (
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"crypto/tls"
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"errors"
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"github.com/googleapis/enterprise-certificate-proxy/client"
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)
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type ecpSource struct {
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key *client.Key
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}
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// NewEnterpriseCertificateProxySource creates a certificate source
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// using the Enterprise Certificate Proxy client, which delegates
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// certifcate related operations to an OS-specific "signer binary"
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// that communicates with the native keystore (ex. keychain on MacOS).
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//
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// The configFilePath points to a config file containing relevant parameters
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// such as the certificate issuer and the location of the signer binary.
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// If configFilePath is empty, the client will attempt to load the config from
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// a well-known gcloud location.
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func NewEnterpriseCertificateProxySource(configFilePath string) (Source, error) {
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key, err := client.Cred(configFilePath)
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if err != nil {
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if errors.Is(err, client.ErrCredUnavailable) {
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return nil, errSourceUnavailable
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}
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return nil, err
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}
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return (&ecpSource{
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key: key,
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}).getClientCertificate, nil
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}
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func (s *ecpSource) getClientCertificate(info *tls.CertificateRequestInfo) (*tls.Certificate, error) {
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var cert tls.Certificate
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cert.PrivateKey = s.key
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cert.Certificate = s.key.CertificateChain()
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return &cert, nil
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}
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