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| author | Jonas Nick <jonasd.nick@gmail.com> | 2019-11-04 12:53:37 +0000 |
|---|---|---|
| committer | Pieter Wuille <pieter.wuille@gmail.com> | 2020-01-19 14:47:33 -0800 |
| commit | c8281deec64dcd06b49efd278c322f13f7b13de7 (patch) | |
| tree | 2bdfcd620932b0a8037db7b1f5bbdb02522db826 /bip-schnorr/reference.py | |
| parent | 9b5ba158c1ee8fc87b6c21de8af58754a7ea3069 (diff) | |
| download | bips-c8281deec64dcd06b49efd278c322f13f7b13de7.tar.xz | |
Fix point_from_bytes accepting out-of-range pubkeys and add test vector
Diffstat (limited to 'bip-schnorr/reference.py')
| -rw-r--r-- | bip-schnorr/reference.py | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/bip-schnorr/reference.py b/bip-schnorr/reference.py index 79be690..f2a944f 100644 --- a/bip-schnorr/reference.py +++ b/bip-schnorr/reference.py @@ -53,6 +53,8 @@ def bytes_from_point(P): def point_from_bytes(b): x = int_from_bytes(b) + if x >= p: + return None y_sq = (pow(x, 3, p) + 7) % p y = pow(y_sq, (p + 1) // 4, p) if pow(y, 2, p) != y_sq: |