crypto: fix bls rogue attack #680
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SebastianElvis
approved these changes
Mar 14, 2025
crypto/bls12381/bls.go
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| // BLS public key. The sig and public key are all compressed | ||
| func PopVerify(sig Signature, pk PublicKey, msg []byte) (bool, error) { | ||
| dummySig := new(BlsSig) | ||
| return dummySig.VerifyCompressed(sig, false, pk, false, msg, DST_POP), nil |
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shouldn't we verify the:
- sigGroupcheck
- pkValidate
i.e set both check flags to true ?
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Nice find! Although not sure pkValidate should be true as it is not mentioned by Cubist. Will check with them
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Closes https://github.com/babylonlabs-io/pm/issues/289. Below is what is recomended to fix the issue which the reviewer should follow to check: