cmpdump.py added

1 files changed, 25 insertions, 0 deletions

diff --git a/tools/cmpdump.py b/tools/cmpdump.py
new file mode 100644
index 0000000..3abde51
--- /dev/null
+++ b/tools/cmpdump.py
@@ -0,0 +1,25 @@
+#!/usr/bin/python
+# Read ASN.1/PEM CMP message on stdin, parse into
+# plain text, then build substrate from it
+from pyasn1.codec.der import decoder, encoder
+from pyasn1_modules import rfc4210, pem
+import sys
+
+if len(sys.argv) != 1:
+    print("""Usage:
+$ cat cmp.pem | %s""" % sys.argv[0])
+    sys.exit(-1)
+    
+pkiMessage = rfc4210.PKIMessage()
+
+substrate = pem.readBase64FromFile(sys.stdin)
+if not substrate:
+    sys.exit(0)
+        
+pkiMsg, rest = decoder.decode(substrate, asn1Spec=pkiMessage)
+
+print(pkiMsg.prettyPrint())
+
+assert encoder.encode(pkiMsg, defMode=False) == substrate or \
+       encoder.encode(pkiMsg, defMode=True) == substrate, \
+       'CMP message recode fails'