def default_d(self):
i = 0
while True:
d = prf_expand(self.data, bytes([3, i]))[:11]
if group_hash(b'Zcash_gd', d):
return d
i += 1
assert i < 256
def main():
args = render_args()
test_vectors = []
for i in range(0, 10):
sk = SpendingKey(bytes([i] * 32))
note_v = (2548793025584392057432895043257984320 * i) % 2**64
note_r = Fr(8890123457840276890326754358439057438290574382905).exp(i +
1)
note_cm = note_commit(
note_r, leos2bsp(bytes(group_hash(b'Zcash_gd', sk.default_d()))),
leos2bsp(bytes(sk.default_pkd())), note_v)
note_pos = (980705743285409327583205473820957432 * i) % 2**MERKLE_DEPTH
note_nf = note_nullifier(sk.nk(), note_cm, Fr(note_pos))
test_vectors.append({
'sk': sk.data,
'ask': bytes(sk.ask()),
'nsk': bytes(sk.nsk()),
'ovk': sk.ovk(),
'ak': bytes(sk.ak()),
'nk': bytes(sk.nk()),
'ivk': bytes(sk.ivk()),
'default_d': sk.default_d(),
'default_pk_d': bytes(sk.default_pkd()),
'note_v': note_v,
'note_r': bytes(note_r),
'note_cm': bytes(note_cm.u),
'note_pos': note_pos,
'note_nf': note_nf,
})
render_tv(
args,
'sapling_key_components',
(
('sk', '[u8; 32]'),
('ask', '[u8; 32]'),
('nsk', '[u8; 32]'),
('ovk', '[u8; 32]'),
('ak', '[u8; 32]'),
('nk', '[u8; 32]'),
('ivk', '[u8; 32]'),
('default_d', '[u8; 11]'),
('default_pk_d', '[u8; 32]'),
('note_v', 'u64'),
('note_r', '[u8; 32]'),
('note_cm', '[u8; 32]'),
('note_pos', 'u64'),
('note_nf', '[u8; 32]'),
),
test_vectors,
)
def diversify_hash(d):
return group_hash(b'Zcash_gd', d)
def default_pkd(self):
return group_hash(b'Zcash_gd', self.default_d()) * self.ivk()
def main():
print('''
struct TestVector {
sk: [u8; 32],
ask: [u8; 32],
nsk: [u8; 32],
ovk: [u8; 32],
ak: [u8; 32],
nk: [u8; 32],
ivk: [u8; 32],
default_d: [u8; 11],
default_pk_d: [u8; 32],
note_v: u64,
note_r: [u8; 32],
note_cm: [u8; 32],
note_pos: u64,
note_nf: [u8; 32],
};
// From https://github.com/zcash-hackworks/zcash-test-vectors/blob/master/sapling_key_components.py
let test_vectors = vec![''')
for i in range(0, 10):
sk = SpendingKey(bytes([i] * 32))
note_v = (2548793025584392057432895043257984320 * i) % 2**64
note_r = Fr(8890123457840276890326754358439057438290574382905).exp(i +
1)
note_cm = note_commit(
note_r, leos2bsp(bytes(group_hash(b'Zcash_gd', sk.default_d()))),
leos2bsp(bytes(sk.default_pkd())), note_v)
note_pos = (980705743285409327583205473820957432 * i) % 2**MERKLE_DEPTH
note_nf = note_nullifier(sk.nk(), note_cm, Fr(note_pos))
print(''' TestVector {
sk: [
%s
],
ask: [
%s
],
nsk: [
%s
],
ovk: [
%s
],
ak: [
%s
],
nk: [
%s
],
ivk: [
%s
],
default_d: [
%s
],
default_pk_d: [
%s
],
note_v: %s,
note_r: [
%s
],
note_cm: [
%s
],
note_pos: %s,
note_nf: [
%s
],
},''' % (
chunk(hexlify(sk.data)),
chunk(hexlify(bytes(sk.ask()))),
chunk(hexlify(bytes(sk.nsk()))),
chunk(hexlify(sk.ovk())),
chunk(hexlify(bytes(sk.ak()))),
chunk(hexlify(bytes(sk.nk()))),
chunk(hexlify(bytes(sk.ivk()))),
chunk(hexlify(sk.default_d())),
chunk(hexlify(bytes(sk.default_pkd()))),
note_v,
chunk(hexlify(bytes(note_r))),
chunk(hexlify(bytes(note_cm.u))),
note_pos,
chunk(hexlify(note_nf)),
))
print(' ];')