feat: 16 funciones cybersecurity — análisis, crypto e IO de seguridad
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>
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package cybersecurity
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import "encoding/base64"
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// IsBase64 verifica si el string proporcionado es una cadena base64 valida (standard encoding).
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func IsBase64(s string) bool {
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if len(s) == 0 {
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return false
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}
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_, err := base64.StdEncoding.DecodeString(s)
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return err == nil
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}
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