diff options
Diffstat (limited to 'src/test/hs_build_address.py')
-rw-r--r-- | src/test/hs_build_address.py | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/test/hs_build_address.py b/src/test/hs_build_address.py new file mode 100644 index 0000000000..7ff22c3a9a --- /dev/null +++ b/src/test/hs_build_address.py @@ -0,0 +1,38 @@ +import sys +import hashlib +import struct +import base64 + +# Python 3.6+, the SHA3 is available in hashlib natively. Else this requires +# the pysha3 package (pip install pysha3). +if sys.version_info < (3, 6): + import sha3 + +# Test vector to make sure the right sha3 version will be used. pysha3 < 1.0 +# used the old Keccak implementation. During the finalization of SHA3, NIST +# changed the delimiter suffix from 0x01 to 0x06. The Keccak sponge function +# stayed the same. pysha3 1.0 provides the previous Keccak hash, too. +TEST_VALUE = "e167f68d6563d75bb25f3aa49c29ef612d41352dc00606de7cbd630bb2665f51" +if TEST_VALUE != sha3.sha3_256(b"Hello World").hexdigest(): + print("pysha3 version is < 1.0. Please install from:") + print("https://github.com/tiran/pysha3https://github.com/tiran/pysha3") + sys.exit(1) + +# Checksum is built like so: +# CHECKSUM = SHA3(".onion checksum" || PUBKEY || VERSION) +PREFIX = ".onion checksum".encode() +# 32 bytes ed25519 pubkey from first test vector of +# https://tools.ietf.org/html/draft-josefsson-eddsa-ed25519-02#section-6 +PUBKEY = "d75a980182b10ab7d54bfed3c964073a0ee172f3daa62325af021a68f707511a".decode('hex') +# Version 3 is proposal224 +VERSION = 3 + +data = struct.pack('15s32sb', PREFIX, PUBKEY, VERSION) +checksum = hashlib.sha3_256(data).digest() + +# Onion address is built like so: +# onion_address = base32(PUBKEY || CHECKSUM || VERSION) + ".onion" +address = struct.pack('!32s2sb', PUBKEY, checksum, VERSION) +onion_addr = base64.b32encode(address).decode().lower() + +print("%s" % (onion_addr)) |