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eth2.0-specs
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change message to message_hash in bls spec 

addresses #572
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Danny Ryan 2019-02-07 10:37:01 -08:00 committed by GitHub
parent 8f37c5c0f8
commit 3f3472087a
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1 changed files with 8 additions and 8 deletions
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specs/bls_signature.md
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@ -69,10 +69,10 @@ We require:
G2_cofactor = 305502333931268344200999753193121504214466019254188142667664032982267604182971884026507427359259977847832272839041616661285803823378372096355777062779109
q = 4002409555221667393417789825735904156556882819939007885332058136124031650490837864442687629129015664037894272559787
def hash_to_G2(message: bytes32, domain: uint64) -> [uint384]:
def hash_to_G2(message_hash: Bytes32, domain: uint64) -> [uint384]:
# Initial candidate x coordinate
x_re = int.from_bytes(hash(message + bytes8(domain) + b'\x01'), 'big')
x_im = int.from_bytes(hash(message + bytes8(domain) + b'\x02'), 'big')
x_re = int.from_bytes(hash(message_hash + bytes8(domain) + b'\x01'), 'big')
x_im = int.from_bytes(hash(message_hash + bytes8(domain) + b'\x02'), 'big')
x_coordinate = Fq2([x_re, x_im]) # x = x_re + i * x_im
# Test candidate y coordinates until a one is found
@ -128,17 +128,17 @@ g = Fq2([g_x, g_y])
### `bls_verify`
Let `bls_verify(pubkey: Bytes48, message: Bytes32, signature: Bytes96, domain: uint64) -> bool`:
Let `bls_verify(pubkey: Bytes48, message_hash: Bytes32, signature: Bytes96, domain: uint64) -> bool`:
* Verify that `pubkey` is a valid G1 point.
* Verify that `signature` is a valid G2 point.
* Verify that `e(pubkey, hash_to_G2(message, domain)) == e(g, signature)`.
* Verify that `e(pubkey, hash_to_G2(message_hash, domain)) == e(g, signature)`.
### `bls_verify_multiple`
Let `bls_verify_multiple(pubkeys: List[Bytes48], messages: List[Bytes32], signature: Bytes96, domain: uint64) -> bool`:
Let `bls_verify_multiple(pubkeys: List[Bytes48], message_hashes: List[Bytes32], signature: Bytes96, domain: uint64) -> bool`:
* Verify that each `pubkey` in `pubkeys` is a valid G1 point.
* Verify that `signature` is a valid G2 point.
* Verify that `len(pubkeys)` equals `len(messages)` and denote the length `L`.
* Verify that `e(pubkeys[0], hash_to_G2(messages[0], domain)) * ... * e(pubkeys[L-1], hash_to_G2(messages[L-1], domain)) == e(g, signature)`.
* Verify that `len(pubkeys)` equals `len(message_hashes)` and denote the length `L`.
* Verify that `e(pubkeys[0], hash_to_G2(message_hashes[0], domain)) * ... * e(pubkeys[L-1], hash_to_G2(message_hashes[L-1], domain)) == e(g, signature)`.