def read_xml(self,xml,private_key):
# Parse Salmon document
tree = ElementTree.fromstring(xml)
encrypted_header = tree.findtext('.//{http://www.w3.org/2005/Atom}encrypted_header')
envelope_data_encrypted = tree.findtext('.//{http://salmon-protocol.org/ns/magic-env}data')
envelope_signature = tree.findtext('.//{http://salmon-protocol.org/ns/magic-env}data')
envelope_encoding = tree.findtext('.//{http://salmon-protocol.org/ns/magic-env}encoding')
envelope_alg = tree.findtext('.//{http://salmon-protocol.org/ns/magic-env}alg')
# Validate stuff
if envelope_encoding != 'base64url':
# Wrong encoding in salmon
return None
if envelope_alg != 'RSA-SHA256':
# Wrong algorithm used for signature
return None
# Check signature
# TODO: IMPORTANT! Verify signature
# B64decode and unfold encrypted header
encrypted_header = simplejson.loads(base64.b64decode(encrypted_header))
encrypted_header_key = base64.b64decode(encrypted_header['aes_key'])
encrypted_header_cipher = base64.b64decode(encrypted_header['ciphertext'])
# Extract the key json (diaspora adds some random padding before json data, so we'll filter that out)
test_dec = re.search('\{\".*\"}',rsa_helper.decrypt(encrypted_header_key,private_key))
if test_dec.group(0) == None:
test_dec = re.search('\{\'.*\'}',rsa_helper.decrypt(encrypted_header_key,private_key))
# Save key and iv and decrypt header
encrypted_header_decrypted_key = [ base64.b64decode(simplejson.loads(test_dec.group(0))[u'key']),
base64.b64decode(simplejson.loads(test_dec.group(0))[u'iv'])]
decrypted_header = self.filter_printable(aes_helper.decrypt(encrypted_header_cipher,encrypted_header_decrypted_key))
# Extract AES iv and key from decrypted header
tree_header = ElementTree.fromstring(decrypted_header)
header_iv = base64.urlsafe_b64decode(tree_header.findtext('.//iv'))
header_key = base64.urlsafe_b64decode(tree_header.findtext('.//aes_key'))
header_author = tree_header.findtext('.//author/name')
header_author_handle = tree_header.findtext('.//author/uri')
# Decrypt Salmon message
envelope_data = self.filter_printable(aes_helper.decrypt(base64.urlsafe_b64decode(base64.urlsafe_b64decode(envelope_data_encrypted)),[header_key,header_iv]))
return [header_author_handle,envelope_data]
plain = "Testing encryption"
cipher = rsa_helper.encrypt(plain,res[0])
if cipher and cipher != plain:
print " - Success"
success += 1
else:
print " - Fail"
fail +=1
except:
print " - Epic fail"
fail +=1
if test_rsa or test_salmon:
print "Decrypting message with private key using rsa_helper..."
try:
new_plain = rsa_helper.decrypt(cipher,res[1])
if new_plain == plain:
print " - Success"
success += 1
else:
print " - Fail"
fail +=1
except:
print " - Epic fail"
fail +=1
if test_salmon:
print "Creating Salmon XML..."
try:
salmon_obj = salmon.Salmon("Robin Nilsson","*****@*****.**",res[1],res[0],"Testing testing")
if salmon_obj: