egutierrez
bd9383fd82
12 funciones puras con implementación real: HashSHA256, HashMD5, EntropyShannon, IsBase64, IsHex, ExtractURLs, ParseIPCIDR, IPInRange, NormalizeURL, DetectSQLInjection, LevenshteinDistance, JaccardSimilarity 4 funciones impuras con implementación real (stdlib): LookupWhois, ResolveDNS, FetchHTTPHeaders, ScanPortTCP Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
34 lines
780 B
Go
34 lines
780 B
Go
package cybersecurity
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"net"
|
|
"strings"
|
|
"time"
|
|
)
|
|
|
|
// LookupWhois realiza una consulta WHOIS para el dominio proporcionado conectandose al servidor whois.iana.org.
|
|
func LookupWhois(domain string) (string, error) {
|
|
conn, err := net.DialTimeout("tcp", "whois.iana.org:43", 10*time.Second)
|
|
if err != nil {
|
|
return "", fmt.Errorf("error conectando al servidor WHOIS: %w", err)
|
|
}
|
|
defer conn.Close()
|
|
|
|
_ = conn.SetDeadline(time.Now().Add(10 * time.Second))
|
|
|
|
_, err = fmt.Fprintf(conn, "%s\r\n", domain)
|
|
if err != nil {
|
|
return "", fmt.Errorf("error enviando consulta WHOIS: %w", err)
|
|
}
|
|
|
|
var sb strings.Builder
|
|
_, err = io.Copy(&sb, conn)
|
|
if err != nil {
|
|
return "", fmt.Errorf("error leyendo respuesta WHOIS: %w", err)
|
|
}
|
|
|
|
return sb.String(), nil
|
|
}
|