From 1db96e2e2768bea6d436378da6676565b4f383a8 Mon Sep 17 00:00:00 2001
From: Peter Surda <surda@economicsofbitcoin.com>
Date: Fri, 23 Dec 2022 11:08:09 +0800
Subject: [PATCH] Add python code

---
 encrypt-decrypt-test-bitmessage.py | 88 ++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 encrypt-decrypt-test-bitmessage.py

diff --git a/encrypt-decrypt-test-bitmessage.py b/encrypt-decrypt-test-bitmessage.py
new file mode 100644
index 0000000..2360347
--- /dev/null
+++ b/encrypt-decrypt-test-bitmessage.py
@@ -0,0 +1,88 @@
+
+from binascii import hexlify, unhexlify
+from struct import pack, unpack
+from sys import exit
+
+from highlevelcrypto import makeCryptor, makePubCryptor, privToPub, hexToPubkey
+from pyelliptic import ECC
+from shared import decodeWalletImportFormat
+
+privencryptionkey = hexlify(decodeWalletImportFormat('5J9ydXT7Ep9pgbbkWei8LNsBMEdv3pgYq4nMnh2mqETzFsH7QYC'))
+#privesigningkey = hexlify(decodeWalletImportFormat('5KZ69cpaXNh4GcaueuibSLae6nyYNRbq5ouX1eA2jFF75jT9Qcr'))
+#privencryptionkey = hexlify(decodeWalletImportFormat('5KZ69cpaXNh4GcaueuibSLae6nyYNRbq5ouX1eA2jFF75jT9Qcr'))
+
+pubkey = privToPub(privencryptionkey)
+c = makeCryptor(privencryptionkey)
+eh = '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'
+e = unhexlify(eh)[14:]
+#e = unhexlify(eh)
+#e = unhexlify(eh)[4:]
+#print e
+
+c.decrypt(e)
+
+exit(0)
+
+m = '040100000001ecdc884536409bc7d387aaf521f95a6b964f20a25bc6cd597165dd6fa76b2c3cf0c8f463480bc2facfa8c9abbe386d528d876d249e0b8ead240a2c6196ba94e547e2673246034a2c920158410dfe970127bfc1efe4d4db58eb48408f338aebe07362e91936e654b3b041591a6c05e5882f51f59582db6808497d4572339d7a0dfd03e8fd03e80083d970e98aa0edec730577a43bdae373953706010a686579207468657265210046304402207ff3b4613dc5deac188b2cfdcbdaafaf567e40bc6859c4612ae9a045786bd48602205c54802071d7205ea5be91c2fc55fbf47d2316f65b9c23e2c7894b9d5d8c900f'
+
+#cp = ECC()
+#e = cp.encrypt(unhexlify(m), hexToPubkey(pubkey))
+#print(hexlify(e))
+#print(len(e))
+
+l = len(e)
+print("IV")
+print(hexlify(e[0:16]))
+print("Curve type")
+print(hexlify(e[16:18]))
+print("X length")
+print(hexlify(e[18:20]))
+print("X")
+print(hexlify(e[20:52]))
+print("Y length")
+print(hexlify(e[52:54]))
+print("Y")
+print(hexlify(e[54:86]))
+print("encrypted")
+print(hexlify(e[86:l-32]))
+print("HMAC")
+print(hexlify(e[-32:]))
+
+retval = c.decrypt(e)
+print(retval)
+
+print "pubkey"
+print pubkey
+
+m2 = hexlify(e)
+offset = 0
+print "addressversion"
+print unhexlify(m2)[offset:offset+1]
+offset += 1
+print "stream"
+print unhexlify(m2)[offset:offset+1]
+offset += 1
+print "behaviour"
+print unhexlify(m2)[offset:offset+4]
+offset += 4
+print "signkey"
+print unhexlify(m2)[offset:offset+64]
+offset += 64
+print "enckey"
+print unhexlify(m2)[offset:offset+64]
+offset += 64
+print "trials"
+print unhexlify(m2)[offset:offset+2]
+offset += 2
+print "extra"
+print unhexlify(m2)[offset:offset+2]
+offset += 2
+print "dest"
+print unhexlify(m2)[offset:offset+20]
+offset += 20
+print "Encoding"
+print unhexlify(m2)[offset:offset+1]
+offset += 1
+print "Length"
+print unhexlify(m2)[offset:offset+1]
+