/
cert.go
83 lines (68 loc) · 1.82 KB
/
cert.go
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// Copyright (C) 2017, 2018, 2019 EGAAS S.A.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or (at
// your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
package utils
import (
"crypto/x509"
"encoding/pem"
"errors"
)
var (
errParseCert = errors.New("Failed to parse certificate")
errParseRootCert = errors.New("Failed to parse root certificate")
)
type Cert struct {
cert *x509.Certificate
}
func (c *Cert) Validate(pem []byte) error {
roots := x509.NewCertPool()
if ok := roots.AppendCertsFromPEM(pem); !ok {
return errParseRootCert
}
if _, err := c.cert.Verify(x509.VerifyOptions{Roots: roots}); err != nil {
return err
}
return nil
}
func (c *Cert) EqualBytes(bs ...[]byte) bool {
for _, b := range bs {
other, err := parseCert(b)
if err != nil {
return false
}
if c.cert.Equal(other) {
return true
}
}
return false
}
func parseCert(b []byte) (*x509.Certificate, error) {
block, _ := pem.Decode(b)
if block == nil {
return nil, errParseCert
}
cert, err := x509.ParseCertificate(block.Bytes)
if err != nil {
return nil, err
}
return cert, nil
}
func ParseCert(b []byte) (c *Cert, err error) {
cert, err := parseCert(b)
if err != nil {
return nil, err
}
return &Cert{cert}, nil
}