78 lines
1.5 KiB
Go
78 lines
1.5 KiB
Go
|
package protocol
|
||
|
|
|
||
|
|
import (
|
||
|
|
"bytes"
|
||
|
|
"crypto/x509"
|
||
|
|
"encoding/asn1"
|
||
|
|
"fmt"
|
||
|
|
"math/big"
|
||
|
|
)
|
||
|
|
|
||
|
|
// IssuerAndSerialNumber ::= SEQUENCE {
|
||
|
|
// issuer Name,
|
||
|
|
// serialNumber CertificateSerialNumber }
|
||
|
|
//
|
||
|
|
// CertificateSerialNumber ::= INTEGER
|
||
|
|
type IssuerAndSerialNumber struct {
|
||
|
|
Issuer asn1.RawValue
|
||
|
|
SerialNumber *big.Int
|
||
|
|
}
|
||
|
|
|
||
|
|
// NewIssuerAndSerialNumber creates a IssuerAndSerialNumber SID for the given
|
||
|
|
// cert.
|
||
|
|
func NewIssuerAndSerialNumber(cert *x509.Certificate) (sid IssuerAndSerialNumber, err error) {
|
||
|
|
sid = IssuerAndSerialNumber{
|
||
|
|
SerialNumber: new(big.Int).Set(cert.SerialNumber),
|
||
|
|
}
|
||
|
|
|
||
|
|
if _, err = asn1.Unmarshal(cert.RawIssuer, &sid.Issuer); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// RawValue returns the RawValue of the IssuerAndSerialNumber.
|
||
|
|
func (ias *IssuerAndSerialNumber) RawValue() (rv asn1.RawValue, err error) {
|
||
|
|
var der []byte
|
||
|
|
if der, err = asn1.Marshal(*ias); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
if _, err = asn1.Unmarshal(der, &rv); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// Equal returns true if ias and ias2 agree.
|
||
|
|
func (ias *IssuerAndSerialNumber) Equal(ias2 IssuerAndSerialNumber) bool {
|
||
|
|
|
||
|
|
if bytes.Compare(ias.Issuer.Bytes, ias2.Issuer.Bytes) != 0 {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
if ias.SerialNumber.Cmp(ias2.SerialNumber) != 0 {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
|
||
|
|
// IASstring retuns the ias of the cert as hex encoded string.
|
||
|
|
func IASstring(cert *x509.Certificate) (iasString string, err error) {
|
||
|
|
ias, err := NewIssuerAndSerialNumber(cert)
|
||
|
|
if err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
rv, err := ias.RawValue()
|
||
|
|
if err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
iasString = fmt.Sprintf("%x", rv.Bytes)
|
||
|
|
return
|
||
|
|
}
|