Start of command line client.

README.md

@@ -1,3 +1,8 @@
 # OpenTimestamps
 
 A hash-chain-based timestamping system.
+
+# Requirements
+
+Python (>=2.7.0)
+PyCrypto (>=0.5)

ots

@@ -0,0 +1,47 @@
+#!/usr/bin/python
+# Copyright (C) 2012 Peter Todd <pete@petertodd.org>
+#
+# This file is part of OpenTimestamps.
+#
+# OpenTimestamps is free software; you can redistribute it and/or modify it
+# under the terms of the GNU Affero General Public License as published by the
+# Free Software Foundation; either version 3 of the License, or (at your
+# option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import sys
+if sys.version_info[1] < 7:
+    sys.exit("OpenTimestamps requires Python version 2.7.0 or newer. "\
+             "(you have %d.%d.%d)"%sys.version_info[0:3])
+
+import Crypto.Hash.SHA256 as chash
+import argparse
+
+parser = argparse.ArgumentParser(description="OpenTimestamps client")
+verbosity_group = parser.add_mutually_exclusive_group()
+verbosity_group.add_argument("-v","--verbose",action="store_true",
+                             help="be verbose")
+verbosity_group.add_argument("-q","--quiet",action="store_true",
+                             help="be quiet")
+
+args = parser.parse_args()
+
+print 'args: ',args
+
+h = chash.new()
+
+in_fd = sys.stdin
+
+while True:
+    d = in_fd.read(4096)
+    if d == '':
+        break
+    h.update(d)
+print h.hexdigest()