revoke_crt.py: Update subprocess.Popen call.

Set `universal_newlines` argument to True for the `subprocess.Popen`
that reads the public key so that the `out` returned from
proc.communicate is of type `str`.

1 files changed, 1 insertions, 1 deletions

diff --git a/revoke_crt.py b/revoke_crt.py
index 2f37524..9897021 100644
--- a/revoke_crt.py
+++ b/revoke_crt.py
@@ -28,7 +28,7 @@ def revoke_crt(pubkey, crt):
     # Step 1: Get account public key
     sys.stderr.write("Reading pubkey file...\n")
     proc = subprocess.Popen(["openssl", "rsa", "-pubin", "-in", pubkey, "-noout", "-text"],
-        stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        stdout=subprocess.PIPE, universal_newlines=True)
     out, err = proc.communicate()
     if proc.returncode != 0:
         raise IOError("Error loading {0}".format(pubkey))