-
Notifications
You must be signed in to change notification settings - Fork 52
Open
Conversation
The `x` coordinate of `R` may be greater than `n`. The current specification of RIP-7212 compares the `x` coordinate with the signature `r` value directly (as integers, presumably), which may return `false` when the standard result should be `true` This happens with negligible probability for honest signatures, but a malicious signature can be constructed which triggers this case. Disagreement could cause differing behavior on various EVM chains. Similarly, it is not specified what should happen when the recovered `R'` is the point at infinity. Most implementations will likely fail (correctly) but some may incorrectly treat `R'.x` as `0`.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
The
xcoordinate ofRmay be greater thann.The current specification of RIP-7212 compares the
xcoordinate with the signaturervalue directly (as integers, presumably), which may returnfalsewhen the standard result should betrueThis happens with negligible probability for honest signatures, but a malicious signature can be constructed which triggers this case. Disagreement could cause differing behavior on various EVM chains.
Similarly, it is not specified what should happen when the recovered
R'is the point at infinity. Most implementations will likely fail (correctly) but some may incorrectly treatR'.xas0.