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pki.go
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pki.go
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// Copyright © 2017 Aaron Donovan <amdonov@gmail.com>
//
// 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 idp
import (
"crypto/x509"
"crypto/x509/pkix"
"encoding/base64"
"errors"
"fmt"
"net/http"
"strings"
"github.com/descope-dev/xmlsig"
)
func getCertFromRequest(r *http.Request) (*x509.Certificate, error) {
if r.TLS == nil || len(r.TLS.PeerCertificates) == 0 {
return nil, errors.New("no certificate provided")
}
return r.TLS.PeerCertificates[0], nil
}
func getCertFromXML(cd *xmlsig.X509Data) (*x509.Certificate, error) {
if cd == nil {
return nil, errors.New("x509 data is nil")
}
certData, err := base64.StdEncoding.DecodeString(cd.X509Certificate)
if err != nil {
return nil, err
}
return x509.ParseCertificate(certData)
}
func getSubjectDN(subject pkix.Name) string {
rdns := []string{}
names := subject.Names
// Reverse the order
for i := len(names) - 1; i >= 0; i-- {
t := names[i].Type
if len(t) == 4 && t[0] == 2 && t[1] == 5 && t[2] == 4 {
var rdnName string
switch t[3] {
case 3:
rdnName = "CN"
case 6:
rdnName = "C"
case 7:
rdnName = "L"
case 8:
rdnName = "ST"
case 9:
rdnName = "STREET"
case 10:
rdnName = "O"
case 11:
rdnName = "OU"
default:
panic("RFC 2253 implementation is incomplete")
}
rdnValue, _ := names[i].Value.(string)
rdns = append(rdns, fmt.Sprintf("%s=%s", rdnName, rdnValue))
}
}
return strings.Join(rdns, ", ")
}