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add address validation

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shwoop 2025-07-02 14:05:49 +02:00
parent 72f593611a
commit 5c54198a68
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GPG key ID: 95A35B68C1E5F95A
1 changed files with 17 additions and 2 deletions
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19
signer/core/siwevalidation.go
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@ -21,6 +21,8 @@ import (
"fmt"
"regexp"
"strings"
"github.com/ethereum/go-ethereum/common"
)
// Regular expression to match SIWE messages
@ -34,7 +36,7 @@ var domain = `(?:[^ ]+)`
var wantsMsg = ` wants you to sign in with your Ethereum account:\n`
// Ethereum address (with basic 0x prefix + 40 hex digits)
var address = `0x[a-fA-F0-9]{40}\n`
var address = `(?:0x[a-fA-F0-9]{40})\n`
// Optional statement (any line not containing "\n\n")
var statement = `(?:[^\n]+\n)?`
@ -84,7 +86,7 @@ func validateSIWE(req *SignDataRequest) error {
continue
}
patterns := siweMessageRegex.FindStringSubmatch(s)
if len(patterns) != 14 {
if len(patterns) != 15 {
return ErrMalformedSIWEMEssage
}
scheme := "https"
@ -94,6 +96,9 @@ func validateSIWE(req *SignDataRequest) error {
if err := validateDomain(req, scheme, patterns[1]); err != nil {
return err
}
if err := validateAddress(req, patterns[2]); err != nil {
return err
}
}
return nil
}
@ -105,3 +110,13 @@ func validateDomain(request *SignDataRequest, scheme, domain string) error {
}
return nil
}
func validateAddress(request *SignDataRequest, address string) error {
checksumAddr := common.HexToAddress(address).Hex()
requestAddr := request.Address.Address().Hex()
if checksumAddr != requestAddr {
return fmt.Errorf("sign in request address (%s) does not match source: %s", checksumAddr, requestAddr)
}
return nil
}