add pem support to public key

This adds pem support to public keys which can now be handled the same
way as private keys.

1 files changed, 9 insertions, 1 deletions

diff --git a/ecdsa.go b/ecdsa.go
index 170786b..f8f51b2 100644
--- a/ecdsa.go
+++ b/ecdsa.go
@@ -1,4 +1,4 @@
-package pkilib
+package pki
 
 import (
   "crypto"
@@ -63,6 +63,14 @@ func (pr EcdsaPrivateKey) MarshalPem() (marshalledPemBlock, error) {
   return pem.EncodeToMemory(&pem_block), nil
 }
 
+// marshal the public key to a pem block
+func (pu *EcdsaPublicKey) MarshalPem() (marshalledPemBlock, error) {
+  asn1, err := x509.MarshalPKIXPublicKey(pu.public_key)
+  if err != nil { return nil, err }
+  pem_block := pem.Block{Type: PemLabelPublic, Bytes: asn1}
+  return pem.EncodeToMemory(&pem_block), nil
+}
+
 // verify a message using the ecdsa public key
 func (pu *EcdsaPublicKey) Verify(message []byte, signature []byte) (bool, error) {
   return false, errors.New("not implemented yet!")