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misc.go
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misc.go
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//
// misc.go : contains misc helper function
// Written By : @ice3man (Nizamul Rana)
//
// Distributed Under MIT License
// Copyrights (C) 2018 Ice3man
//
package helper
import (
"crypto/rand"
"fmt"
"io"
"strings"
)
// Current result structure
type Result struct {
Subdomains []string // Subdomains found
Error error // Any error that has occured
}
//Domain structure
type Domain struct {
IP string
Fqdn string
}
// NewUUID generates a random UUID according to RFC 4122
// Taken from : https://play.golang.org/p/4FkNSiUDMg
//
// Used for bruteforcing and detection of Wildcard Subdomains :-)
func NewUUID() (string, error) {
uuid := make([]byte, 16)
n, err := io.ReadFull(rand.Reader, uuid)
if n != len(uuid) || err != nil {
return "", err
}
// variant bits; see section 4.1.1
uuid[8] = uuid[8]&^0xc0 | 0x80
// version 4 (pseudo-random); see section 4.1.3
uuid[6] = uuid[6]&^0xf0 | 0x40
return fmt.Sprintf("%x-%x-%x-%x-%x", uuid[0:4], uuid[4:6], uuid[6:8], uuid[8:10], uuid[10:]), nil
}
// Returns unique items in a slice
// Adapted from http://www.golangprograms.com/remove-duplicate-values-from-slice.html
func Unique(elements []string) []string {
// Use map to record duplicates as we find them.
encountered := map[string]bool{}
result := []string{}
for v := range elements {
if encountered[elements[v]] == true {
// Do not add duplicate.
} else {
// Record this element as an encountered element.
encountered[elements[v]] = true
// Append to result slice.
result = append(result, elements[v])
}
}
// Return the new slice.
return result
}
//Validate returns valid subdomains found ending with target domain
func Validate(domain string, strslice []string) (subdomains []string) {
for _, entry := range strslice {
if strings.HasSuffix(entry, "."+domain) {
subdomains = append(subdomains, entry)
}
}
return subdomains
}