[catapult] - Copy Telemetry's gsutilz over to third_party.

third_party/gsutil/third_party/pyasn1-modules/tools/pkcs10dump.py

Index: third_party/gsutil/third_party/pyasn1-modules/tools/pkcs10dump.py
diff --git a/third_party/gsutil/third_party/pyasn1-modules/tools/pkcs10dump.py b/third_party/gsutil/third_party/pyasn1-modules/tools/pkcs10dump.py
new file mode 100755
index 0000000000000000000000000000000000000000..ea979c0cf5a77106afd41185049a6feb52302081
--- /dev/null
+++ b/third_party/gsutil/third_party/pyasn1-modules/tools/pkcs10dump.py
@@ -0,0 +1,39 @@
+#!/usr/bin/python
+#
+# Read ASN.1/PEM X.509 certificate requests (PKCS#10 format) on stdin, 
+# parse each into plain text, then build substrate from it
+#
+from pyasn1.codec.der import decoder, encoder
+from pyasn1_modules import rfc2314, pem
+import sys
+
+if len(sys.argv) != 1:
+    print("""Usage:
+$ cat certificateRequest.pem | %s""" % sys.argv[0])
+    sys.exit(-1)
+    
+certType = rfc2314.CertificationRequest()
+
+certCnt = 0
+
+while 1:
+    idx, substrate = pem.readPemBlocksFromFile(
+                      sys.stdin, ('-----BEGIN CERTIFICATE REQUEST-----',
+                                  '-----END CERTIFICATE REQUEST-----')
+                     )
+    if not substrate:
+        break
+        
+    cert, rest = decoder.decode(substrate, asn1Spec=certType)
+
+    if rest: substrate = substrate[:-len(rest)]
+        
+    print(cert.prettyPrint())
+
+    assert encoder.encode(cert, defMode=False) == substrate or \
+           encoder.encode(cert, defMode=True) == substrate, \
+           'cert recode fails'
+        
+    certCnt = certCnt + 1
+    
+print('*** %s PEM certificate request(s) de/serialized' % certCnt)