added a function to return the public key string from a keypair object

diff --git a/sfa/trust/certificate.py b/sfa/trust/certificate.py
index 58486ec..4a17338 100644 (file)
--- a/sfa/trust/certificate.py
+++ b/sfa/trust/certificate.py
@@ -162,11 +162,21 @@ class Keypair:
    def as_pem(self):
       return crypto.dump_privatekey(crypto.FILETYPE_PEM, self.key)
 
+   ##
+   # Return an M2Crypto key object
+
    def get_m2_pkey(self):
       if not self.m2key:
          self.m2key = M2Crypto.EVP.load_key_string(self.as_pem())
       return self.m2key
 
+   ##
+   # Returns a string containing the public key represented by this object.
+
+   def get_pubkey_string(self):
+      m2pkey = self.get_m2_pkey()
+      return base64.b64encode(m2pkey.as_der())
+
    ##
    # Return an OpenSSL pkey object