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>
27 lines
506 B
Go
27 lines
506 B
Go
package cybersecurity
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import "math"
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// EntropyShannon calcula la entropia de Shannon de los datos proporcionados.
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// Devuelve un valor entre 0 (datos uniformes) y 8 (datos completamente aleatorios para bytes).
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func EntropyShannon(data []byte) float64 {
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if len(data) == 0 {
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return 0
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}
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var freq [256]float64
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for _, b := range data {
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freq[b]++
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}
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n := float64(len(data))
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entropy := 0.0
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for _, f := range freq {
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if f > 0 {
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p := f / n
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entropy -= p * math.Log2(p)
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}
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}
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return entropy
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}
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