report number of servers that use ECDSA and RSA certificates

Since use of both ECDSA and RSA certificates is easy, it is
relatively simple to support both. Report the total number of
such servers

top1m/parse_results.py

@@ -15,6 +15,7 @@ protocolstats = defaultdict(int)
 handshakestats = defaultdict(int)
 keysize = defaultdict(int)
 sigalg = defaultdict(int)
+dsarsastack = 0
 total = 0
 for r,d,flist in os.walk(path):
 
@@ -40,6 +41,8 @@ for r,d,flist in os.walk(path):
         TLS1 = False
         TLS1_1 = False
         TLS1_2 = False
+        dualstack = False
+        ECDSA = False
 
         """ process the file """
         f_abs = os.path.join(r,f)
@@ -95,11 +98,16 @@ for r,d,flist in os.walk(path):
 
                 """ save the key size """
                 if 'ECDSA' in entry['cipher']:
+                    ECDSA = True
                     tempecckeystats[entry['pubkey'][0]] = 1
                 elif 'DSS' in entry['cipher']:
                     tempdsakeystats[entry['pubkey'][0]] = 1
+                elif 'AECDH' in entry['cipher'] or 'ADH' in entry['cipher']:
+                    """ skip """
                 else:
                     tempkeystats[entry['pubkey'][0]] = 1
+                    if ECDSA:
+                        dualstack = True
 
                 """ save key signatures size """
                 tempsigstats[entry['sigalg'][0]] = 1
@@ -133,6 +141,9 @@ for r,d,flist in os.walk(path):
         for s in tempdsakeystats:
             keysize['DSA ' + s] += 1
 
+        if dualstack:
+            dsarsastack += 1
+
         for s in tempsigstats:
             sigalg[s] += 1
 
@@ -231,6 +242,8 @@ for stat in sorted(keysize):
     percent = round(keysize[stat] / total * 100, 4)
     sys.stdout.write(stat.ljust(25) + " " + str(keysize[stat]).ljust(10) + str(percent).ljust(9) + "\n")
 
+sys.stdout.write("RSA/ECDSA Dual Stack".ljust(25) + " " + str(dsarsastack).ljust(10) + str(round(dsarsastack/total * 100, 4)) + "\n")
+
 print("\nSupported Protocols       Count     Percent")
 print("-------------------------+---------+-------")
 for stat in sorted(protocolstats):