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Check via zlint if a domain's TLD is valid #7943

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Check via zlint if a domain's TLD is valid #7943

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086cd68
Check via zlint if a domain's TLD is valid
mcpherrinm Jan 13, 2025
9ac5f5c
Unknown instead of invalid
mcpherrinm Jan 13, 2025
2c3ca81
move check after the empty-suffix handling
mcpherrinm Jan 13, 2025
f5f7613
Change domain uses in High-risk domain test
mcpherrinm Jan 13, 2025
5fdd429
Use HasValidTLD on the full name instead
mcpherrinm Jan 14, 2025
b949278
Revert "Change domain uses in High-risk domain test"
mcpherrinm Jan 14, 2025
8535f2a
Merge branch 'main' into mattm-zlint-tld
mcpherrinm Apr 22, 2025
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6 changes: 6 additions & 0 deletions iana/iana.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,12 +4,14 @@ import (
"fmt"

"github.com/weppos/publicsuffix-go/publicsuffix"
zlintutil "github.com/zmap/zlint/v3/util"
)

// ExtractSuffix returns the public suffix of the domain using only the "ICANN"
// section of the Public Suffix List database.
// If the domain does not end in a suffix that belongs to an IANA-assigned
// domain, ExtractSuffix returns an error.
// It confirms with zlint's TLD list.
func ExtractSuffix(name string) (string, error) {
if name == "" {
return "", fmt.Errorf("Blank name argument passed to ExtractSuffix")
Expand All @@ -28,5 +30,9 @@ func ExtractSuffix(name string) (string, error) {
suffix = name
}

if !zlintutil.IsInTLDMap(suffix) {
return "", fmt.Errorf("Domain %s has an unknown TLD %s", name, suffix)
}

return suffix, nil
}