Colorful, aligned output

[tls-check.git] / tls-check

diff --git a/tls-check b/tls-check
index 27651d53855b9a36b970c52434143898eb4a3126..5e8e19e5e18de4bf467cc0e586aa89d57c9d2e63 100755 (executable)
--- a/tls-check
+++ b/tls-check
@@ -3,7 +3,9 @@ import subprocess, sys, argparse, time, re
 from collections import OrderedDict, namedtuple
 from enum import Enum
 
-# progress bar
+# progress bar and other console output fun
+STATE_WIDTH = 30
+
 def terminal_size():
     import fcntl, termios, struct
     try:
@@ -24,7 +26,6 @@ def compute_frac(fracs):
     return frac
 
 def print_progress(state, fracs):
-    STATE_WIDTH = 30
     w, h = terminal_size()
     if w < STATE_WIDTH+10: return # not a (wide enough) terminal
     bar_width = w-STATE_WIDTH-3
@@ -35,7 +36,17 @@ def finish_progress():
     w, h = terminal_size()
     sys.stdout.write('\r'+(' '*w)+'\r')
     sys.stdout.flush()
+
+class ConsoleFormat:
+    BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(8)
+    RESET_SEQ = "\033[0m"
+    COLOR_SEQ = "\033[1;3%dm"
+    BOLD_SEQ  = "\033[1m"
     
+    @staticmethod
+    def color(text, color):
+        return (ConsoleFormat.COLOR_SEQ % color) + text + ConsoleFormat.RESET_SEQ
+
 
 # cipher check
 def list_ciphers(spec="ALL:COMPLEMENTOFALL"):
@@ -86,6 +97,17 @@ class CipherStrength(Enum):
     low = 1
     medium = 2
     high = 3
+    
+    def colorName(self):
+        if self == CipherStrength.unknown:
+            return self.name
+        elif self.value == CipherStrength.high.value:
+            return ConsoleFormat.color(self.name, ConsoleFormat.GREEN)
+        elif self.value == CipherStrength.medium.value:
+            return ConsoleFormat.color(self.name, ConsoleFormat.YELLOW)
+        else:
+            return ConsoleFormat.color(self.name, ConsoleFormat.RED)
+
 CipherProps = namedtuple('CipherProps', 'bits, strength, isPfs')
 
 class CipherPropsProvider:
@@ -107,11 +129,11 @@ class CipherPropsProvider:
             raise Exception("Unexpected OpenSSL output: Cannot determine encryption strength from {1}\nComplete output: {0}".format(cipherInfo, cipherInfoFields[4]))
         bits = int(bitMatch.group(1))
         # figure out whether the cipher is pfs
-        kxMatch = re.match(r'^Kx=([0-9A-Z/]+)$', cipherInfoFields[2])
+        kxMatch = re.match(r'^Kx=([0-9A-Z/()]+)$', cipherInfoFields[2])
         if kxMatch is None:
-            raise Exception("Unexpected OpenSSL output: Cannot determine key-exchange method from {1}\nComplete output: {0}".format(cipherInfo), cipherInfoFields[2])
+            raise Exception("Unexpected OpenSSL output: Cannot determine key-exchange method from {1}\nComplete output: {0}".format(cipherInfo, cipherInfoFields[2]))
         kx = kxMatch.group(1)
-        isPfs = kx in ('DH', 'ECDH')
+        isPfs = kx in ('DH', 'DH(512)', 'ECDH')
         # determine security level
         isExp = cipher in self.exp
         isLow = cipher in self.low
@@ -175,5 +197,7 @@ if __name__ == "__main__":
             for cipher, supported in ciphers.items():
                 if supported:
                     cipherProps = propsProvider.getProps(cipher)
-                    print("    {0} ({1}, {2} bits, {3})".format(cipher, cipherProps.strength.name, cipherProps.bits, "FS" if cipherProps.isPfs else "not FS"))
+                    fsText = ConsoleFormat.color("FS", ConsoleFormat.GREEN) if cipherProps.isPfs else ConsoleFormat.color("no FS", ConsoleFormat.RED)
+                    bitColor = ConsoleFormat.GREEN if cipherProps.bits > 128 else (ConsoleFormat.YELLOW if cipherProps.bits >= 100 else ConsoleFormat.RED)
+                    print("    {0} ({1}, {2}, {3})".format(cipher.ljust(STATE_WIDTH), cipherProps.strength.colorName(), ConsoleFormat.color(str(cipherProps.bits)+" bits", bitColor), fsText))
         print()