ARCHIVE/xrpl-dev-portal
1
0
Fork 0
mirror of https://github.com/XRPLF/xrpl-dev-portal.git synced 2025-12-06 17:27:57 +00:00
Code Issues Packages Projects Releases Wiki Activity

v1.5.0 amendments: edits per reviews

Browse Source
This commit is contained in:
mDuo13
2020-03-26 17:51:41 -07:00
parent 33ec52d83d
commit 508e34a0e5
2 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
content/concepts/consensus-network/transaction-malleability.md
View File

@@ -43,7 +43,7 @@ An ECDSA signature consists of two integers, called R and S. The secp256k1 _grou
Thus, to have _fully_ canonical signatures, one must choose which of the two possibilities is preferred and declare the other to be invalid. The creators of the XRP Ledger decided arbitrarily to prefer the _smaller_ of the two possible values, `S` or `N-S`. A transaction is considered _fully canonical_ if it uses the preferred (smaller) value of `S`, and follows all the normal rules for being canonical.
To maintain compatibility with older software that did not always generate fully canonical signatures, the XRP Ledger accepts transactions that are not fully canonical. To protect new users from exploits, the XRP Ledger has a flag on transactions called [**tfFullyCanonicalSig**](transaction-common-fields.html#global-flags), which requires that the transaction use a _fully-canonical_ signature to be valid. If the [RequireFullyCanonicalSig amendment][] :not_enabled: is enabled, all transactions require fully-canonical signatures regardless of the tfFullyCanonicalSig flag.
To maintain compatibility with older software that did not always generate fully canonical signatures, the XRP Ledger accepts transactions that are not fully canonical. To protect new users from exploits, the XRP Ledger has a flag on transactions called [**tfFullyCanonicalSig**](transaction-common-fields.html#global-flags), which requires that the transaction use a _fully-canonical_ signature to be valid. If the [RequireFullyCanonicalSig amendment][] :not_enabled: is enabled, all transactions require fully-canonical signatures regardless of the tfFullyCanonicalSig flag, and legacy software that makes non-fully-canonical signatures is no longer compatible.
To calculate a fully-canonical ECDSA signature, one must compare S and N-S to determine which is smaller, then use that value in the `Signature` field of the transaction.