refine certificate sign request workings

certificate.go

@@ -1,45 +1,55 @@
 package pki
 
 import (
-//  "crypto/x509/pkix"
-  "errors"
+  "crypto/rand"
+  "crypto/x509"
+  "crypto/x509/pkix"
+  "encoding/pem"
   "net"
 )
 
-var (
-  ErrTypeMisMatch = errors.New("types mismatched")
-)
+const PemLabelCertificateRequest = "CERTIFICATE REQUEST"
 
 type (
   CertificateData struct {
-    // required fields
-    SerialNumber   string
-    CommonName     string
+    Subject  pkix.Name
 
-    // alternative data
-    DNSNames       []string
+    DnsNames       []string
     EmailAddresses []string
-    IPAddresses    []net.IP
-
-    // address data
-    Country        []string
-    Province       []string
-    Locality       []string
-    PostalCode     []string
-    StreetAddress  []string
-    Organization   []string
-    OrganizationalUnit []string
+    IpAddresses    []net.IP
   }
+
+  Certificate x509.Certificate
+  CertificateRequest x509.CertificateRequest
 )
 
-// create a certificate sign request with the certificate data
-//func (c *CertificateData) CreateCertificateRequest(priv PrivateKey) (*Certificate, error) {
-//  csr := x509.CertificateRequest{}
-//  csr.Subject := c.createSubject()
-//}
-//
-//// create a pkix.Name for the subject of a cert or csr
-//func (c *CertificateData) createSubject() (pkix.Name) {
-//  name := pkix.Name{}
-//  errors := make([]error, 0)
-//}
+// 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(csr_asn1)
+  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
+}
+
+func (c *CertificateRequest) ToCertificate() {
+}