forked from sassoftware/relic
/
certpool.go
51 lines (48 loc) · 1.37 KB
/
certpool.go
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//
// Copyright (c) SAS Institute Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package x509tools
import (
"crypto/tls"
"crypto/x509"
"fmt"
"io/ioutil"
)
// Load a certificate pool from a file and set it as the root CA for a TLS
// config. If path is empty then the system pool will be used. If the filename
// starts with + then both the system pool and the contents of the file will be
// used.
func LoadCertPool(path string, tconf *tls.Config) error {
if path == "" {
return nil
} else if path[0] == '+' {
pool, err := x509.SystemCertPool()
if err != nil {
return err
}
tconf.RootCAs = pool
path = path[1:]
} else {
tconf.RootCAs = x509.NewCertPool()
}
contents, err := ioutil.ReadFile(path)
if err != nil {
return err
}
if !tconf.RootCAs.AppendCertsFromPEM(contents) {
return fmt.Errorf("no CA certificates in %s", path)
}
return nil
}