[test suite] add python SPA packet payload fuzzer

test/spa_fuzzing.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python
+#
+# Purpose: This script generates SPA packet payloads that are designed to
+#          act as fuzzer against libfko SPA decoding routines.
+#
+# Fuzzing file format:
+#
+#   <pkt_ID> <status: success|fail> <digest: yes|no> <digest type> <base64_SPA_payload>
+#
+# SPA payload format (before:
+#
+#   <rand_num>:<user>:<timestamp>:<version>:<spa_msg_type>:<access_request
+#
+# Example SPA payload (after inner base64 encoding):
+#
+#   1716411011200157:cm9vdA:1397329899:2.0.1:1:MTI3LjAuMC4yLHRjcC8yMw
+#
+
+import base64
+import argparse
+
+def main():
+
+    args = parse_cmdline()
+
+    print_hdr()
+
+    spa_payload = "1716411011200157:cm9vdA:1397329899:2.0.1:1:MTI3LjAuMC4yLHRjcC8yMw"
+
+    pkt_id = 1
+
+    #### non-ascii char tests
+    for pos in range(0, len(spa_payload)):
+        for non_ascii in range(0, 31) + range(127, 255):
+            new_payload = list(spa_payload)
+            new_payload[pos] = chr(non_ascii)
+            ### write out the fuzzing line
+            print str(pkt_id) + " 0 1 3 " + base64.b64encode(''.join(new_payload))
+            pkt_id += 1
+
+    # for c in list(spa_payload):
+        # print c
+
+    return
+
+def print_hdr():
+    print "# <pkt_ID> <status: success|fail> <digest: yes|no> <digest type> <base64_SPA_payload>"
+    return
+
+def parse_cmdline():
+
+    ### parse command line args
+    parser = argparse.ArgumentParser()
+
+    parser.add_argument("-c", "--max-packet-count", type=int, help="packet count", default=1000000)
+
+    args = parser.parse_args()
+    return args
+
+if __name__ == "__main__":
+    main()