print out the base58 encoding of an identity's public key so that

it can be loaded into the server to be authorized...

ui/cli.py

@@ -7,6 +7,7 @@ from cryptography.hazmat.primitives.asymmetric.ed448 import Ed448PrivateKey, \
 from cryptography.hazmat.primitives.serialization import Encoding, \
     PrivateFormat, PublicFormat, NoEncryption
 
+import base58
 import copy
 import datetime
 import hashlib
@@ -479,13 +480,15 @@ def main():
 	    default=False, help='update the identity')
 	parser.add_option('-l', action='store_true', dest='list',
 	    default=False, help='list metadata')
+	parser.add_option('-p', action='store_true', dest='printpub',
+	    default=False, help='Print the public key of the identity')
 
 	options, args = parser.parse_args()
 
 	# this is shared between generateident and add
 	addprops = map(lambda x: x.split('=', 1), options.add)
 
-	if options.generateident or options.updateident:
+	if options.generateident or options.updateident or options.printpub:
 		identfname = os.path.expanduser('~/.medashare_identity.pasn1')
 
 		if options.generateident and os.path.exists(identfname):
@@ -498,6 +501,10 @@ def main():
 		else:
 			persona = Persona.load(identfname)
 
+		if options.printpub:
+			print base58.b58encode_check(persona.get_identity().pubkey)
+			return
+
 		persona.new_version(*addprops)
 		persona.store(identfname)
 		return
@@ -902,6 +909,19 @@ class _TestCases(unittest.TestCase):
 			# and that the old Persona can verify the new one
 			self.assertTrue(persona.verify(nident))
 
+			# that when asked to print the public key
+			with nested(mock.patch('sys.stdout',
+			    StringIO.StringIO()), mock.patch('sys.argv',
+			    [ 'progname', '-p' ])) as (stdout, argv):
+				main()
+
+				# the correct key is printed
+				self.assertEqual(stdout.getvalue(),
+				    '%s\n' % base58.b58encode_check(pident.pubkey))
+
+			# and looked up the correct file
+			eu.assert_called_with('~/.medashare_identity.pasn1')
+
 			with nested(mock.patch('sys.stdout',
 			    StringIO.StringIO()), mock.patch('sys.argv',
 			    [ 'progname', '-l', testfname ])) as (stdout, argv):

ui/requirements.txt

@@ -4,3 +4,4 @@ coverage
 mock
 klein
 cryptography
+base58