Use specific function for odd integer generation

1 files changed, 13 insertions, 0 deletions

diff --git a/rsa/randnum.py b/rsa/randnum.py
index 12a6757..3c788a5 100644
--- a/rsa/randnum.py
+++ b/rsa/randnum.py
@@ -59,6 +59,19 @@ def read_random_int(nbits):
     return value
 
 
+def read_random_odd_int(nbits):
+    """Reads a random odd integer of approximately nbits bits.
+
+    >>> read_random_odd_int(512) & 1
+    1
+    """
+
+    value = read_random_int(nbits)
+
+    # Make sure it's odd
+    return value | 1
+
+
 def randint(maxvalue):
     """Returns a random integer x with 1 <= x <= maxvalue