1 files changed, 54 insertions, 0 deletions
diff --git a/rsa.go b/rsa.go
new file mode 100644
index 0000000..48135b2
--- /dev/null
+++ b/rsa.go
@@ -0,0 +1,54 @@
+package pkilib
+
+import (
+  "crypto"
+  "crypto/rand"
+  "crypto/rsa"
+  "crypto/x509"
+  "errors"
+)
+
+type (
+  RsaPrivateKey struct {
+    private_key *rsa.PrivateKey
+  }
+
+  RsaPublicKey struct {
+    public_key rsa.PublicKey
+  }
+)
+
+// generate a new rsa private key
+func NewPrivateKeyRsa(size int) (*RsaPrivateKey, error) {
+  key, err := rsa.GenerateKey(rand.Reader, size)
+  if err != nil { return nil, err }
+  return &RsaPrivateKey{key}, nil
+}
+
+// load a rsa private key its ASN.1 presentation
+func LoadPrivateKeyRsa(raw []byte) (*RsaPrivateKey, error) {
+  key, err := x509.ParsePKCS1PrivateKey(raw)
+  if err != nil { return nil, err }
+  return &RsaPrivateKey{key}, nil
+}
+
+func (pr *RsaPrivateKey) Public() PublicKey {
+  return &RsaPublicKey{pr.private_key.Public().(rsa.PublicKey)}
+}
+
+func (pr RsaPrivateKey) Sign(message []byte) ([]byte, error) {
+  return make([]byte, 0), errors.New("not implemented yet!")
+}
+
+// get the private key
+func (pr RsaPrivateKey) privateKey() crypto.PrivateKey {
+  return pr.private_key
+}
+
+func (pr RsaPrivateKey) MarshalPem() (marshalledPemBlock, error) {
+  return nil, errors.New("not implemented yet!")
+}
+
+func (pu *RsaPublicKey) Verify(message []byte, signature []byte) (bool, error) {
+  return false, errors.New("not implemented yet!")
+}