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signer/core: avoid mutating the input

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This commit is contained in:
Weixie Cui 2026-05-08 21:16:00 +08:00
parent 1abbae239d
commit bf978fe60b
1 changed files with 3 additions and 1 deletions
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4
signer/core/signed_data.go
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@ -17,6 +17,7 @@
package core package core
import ( import (
"bytes"
"context" "context"
"encoding/json" "encoding/json"
"errors" "errors"
@ -309,7 +310,8 @@ func (api *SignerAPI) EcRecover(ctx context.Context, data hexutil.Bytes, sig hex
if sig[64] != 27 && sig[64] != 28 { if sig[64] != 27 && sig[64] != 28 {
return common.Address{}, errors.New("invalid Ethereum signature (V is not 27 or 28)") return common.Address{}, errors.New("invalid Ethereum signature (V is not 27 or 28)")
} }
sig[64] -= 27 // Transform yellow paper V from 27/28 to 0/1 sig = bytes.Clone(sig) // Avoid mutating the input
sig[64] -= 27 // Transform yellow paper V from 27/28 to 0/1
hash := accounts.TextHash(data) hash := accounts.TextHash(data)
rpk, err := crypto.SigToPub(hash, sig) rpk, err := crypto.SigToPub(hash, sig)
if err != nil { if err != nil {