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package pki
import (
"crypto/rand"
"crypto/x509"
"crypto/x509/pkix"
"encoding/pem"
"net"
)
const PemLabelCertificateRequest = "CERTIFICATE REQUEST"
type (
CertificateData struct {
Subject pkix.Name
DnsNames []string
EmailAddresses []string
IpAddresses []net.IP
}
Certificate x509.Certificate
CertificateRequest x509.CertificateRequest
)
func NewCertificateData() *CertificateData {
return &CertificateData{Subject: pkix.Name{}}
}
// Create a certificate sign request from the input data and the private key of
// the request creator.
func (c *CertificateData) ToCertificateRequest(private_key PrivateKey) (*CertificateRequest, error) {
csr := &x509.CertificateRequest{}
csr.Subject = c.Subject
csr.DNSNames = c.DnsNames
csr.IPAddresses = c.IpAddresses
csr.EmailAddresses = c.EmailAddresses
csr_asn1, err := x509.CreateCertificateRequest(rand.Reader, csr, private_key.PrivateKey())
if err != nil { return nil, err }
return LoadCertificateSignRequest(csr_asn1)
}
// Load a certificate sign request from its asn1 representation.
func LoadCertificateSignRequest(raw []byte) (*CertificateRequest, error) {
csr, err := x509.ParseCertificateRequest(raw)
if err != nil { return nil, err }
return (*CertificateRequest)(csr), nil
}
// Return the certificate sign request as a pem block.
func (c *CertificateRequest) MarshalPem() (marshalledPemBlock, error) {
block := &pem.Block{Type: PemLabelCertificateRequest, Bytes: c.Raw}
return pem.EncodeToMemory(block), nil
}
// Convert the certificate sign request to a certificate using the private key
// of the signer and the certificate of the signer.
// If the certificate is null, the sign request will be used to sign itself.
// For more information, please read http://golang.org/pkg/crypto/x509/#CreateCertificate
func (c *CertificateRequest) ToCertificate(private_key PrivateKey, ca *Certificate) (*Certificate, error) {
template := &x509.Certificate{}
template.Subject = c.Subject
template.DNSNames = c.DNSNames
template.IPAddresses = c.IPAddresses
template.EmailAddresses = c.EmailAddresses
var cert_asn1 []byte
var err error
if ca == nil {
cert_asn1, err = x509.CreateCertificate(rand.Reader, template, template, c.PublicKey, private_key)
} else {
cert_asn1, err = x509.CreateCertificate(rand.Reader, template, (*x509.Certificate)(ca), c.PublicKey, private_key)
}
if err != nil { return nil, err }
return LoadCertificate(cert_asn1)
}
// Load a certificate from its asn1 representation.
func LoadCertificate(raw []byte) (*Certificate, error) {
cert, err := x509.ParseCertificate(raw)
if err != nil { return nil, err }
return (*Certificate)(cert), nil
}
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