adding command line tool

utils/pEp

@@ -0,0 +1,73 @@
+#!env python3
+# -*- coding: utf-8 -*-
+
+
+"""
+p≡p command line version 1.0
+Copyleft 2016, p≡p foundation
+written by Volker Birk
+
+"""
+
+
+from pEp import *
+import argparse
+import sys
+
+
+parser = argparse.ArgumentParser(
+        description='provide p≡p functionality on the command line',
+        epilog='Copyleft 2016, p≡p foundation. All lefts reserved.'
+    )
+
+parser.add_argument('--encrypt', '-e', help='encrypt p≡p message',
+        action='store_true', dest='encrypt')
+parser.add_argument('--decrypt', '-d', help='decrypt p≡p message',
+        action='store_true', dest='decrypt')
+parser.add_argument('--version', '-V', help='show program version',
+        action='store_true', dest='version')
+parser.add_argument('files', metavar='FILE', nargs='*',
+        help='FILE with MIME text')
+
+args = parser.parse_args()
+
+if not(args.encrypt) and not(args.decrypt) and not(args.version):
+    print('use either --encrypt or --decrypt', file=sys.stderr)
+    sys.exit(2)
+
+if args.version:
+    print(__doc__)
+
+try:
+    if len(args.files) == 0:
+        args.files = ['-']
+
+    for filename in args.files:
+        if filename == '-':
+            text = ''
+            for line in sys.stdin.readlines():
+                if line[-2:] == '\r\n':
+                    text += line
+                elif line[-1:] == '\n':
+                    text += line[:-1] + '\r\n'
+                else:
+                    text += line + '\r\n'
+        else:
+            with open(filename, "r") as f:
+                text = f.readall()
+
+        src = Message(text)
+
+        if args.encrypt:
+            src.dir = 1
+            dst = src.encrypt()
+        else:
+            src.dir = 0
+            dst, keys, rating, flags = src.decrypt()
+
+        print(str(dst))
+
+except KeyboardInterrupt:
+    print('\n', file=sys.stderr)
+    sys.exit(1)
+