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client.go
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client.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 config
import "crypto/x509"
func (cl *ClientConfig) Match(incoming []*x509.Certificate) (bool, error) {
if cl.certs == nil || len(incoming) == 0 {
return false, nil
}
leaf := incoming[0]
intermediates := incoming[1:]
ipool := x509.NewCertPool()
for _, cert := range intermediates {
ipool.AddCert(cert)
}
_, err := leaf.Verify(x509.VerifyOptions{
Roots: cl.certs,
Intermediates: ipool,
KeyUsages: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},
})
if err == nil {
return true, nil
} else if _, ok := err.(x509.UnknownAuthorityError); ok {
return false, nil
}
return false, err
}