95 lines
2.2 KiB
Go
95 lines
2.2 KiB
Go
package zgrab2
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import (
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"errors"
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"net"
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"strconv"
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"strings"
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"github.com/ajholland/zflags"
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)
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var parser *flags.Parser
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func init() {
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parser = flags.NewParser(&config, flags.Default)
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}
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// AddCommand adds a module to the parser and returns a pointer to
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// a flags.command object or an error
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func AddCommand(command string, shortDescription string, longDescription string, port int, m ScanModule) (*flags.Command, error) {
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cmd, err := parser.AddCommand(command, shortDescription, longDescription, m)
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if err != nil {
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return nil, err
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}
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cmd.FindOptionByLongName("port").Default = []string{strconv.FormatUint(uint64(port), 10)}
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cmd.FindOptionByLongName("name").Default = []string{command}
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return cmd, nil
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}
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// ParseFlags abstracts away the parser and validates the framework
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// configuration (global options) immediately after parsing
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func ParseFlags() ([]string, error) {
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r, err := parser.Parse()
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if err == nil {
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validateFrameworkConfiguration()
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}
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return r, err
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}
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// ParseTarget takes input as a string and parses it into either an IPNet
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// (may have empty mask and just contain IP , domain name, or errors, may
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// return both IPNet and domain name
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func ParseTarget(s string) (*net.IPNet, string, error) {
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i := strings.IndexByte(s, ',')
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j := strings.IndexByte(s, '/')
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switch {
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case i == -1 && j == -1:
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// just ip or domain
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if ip := net.ParseIP(s); ip != nil {
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return &net.IPNet{IP: ip}, "", nil
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} else {
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ips, err := net.LookupIP(s)
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if err != nil {
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return nil, "", err
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}
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return &net.IPNet{IP: ips[0]}, s, nil // only return first IP after a lookup
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}
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case i == -1:
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// cidr block
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_, ipnet, err := net.ParseCIDR(s)
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if err != nil {
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return nil, "", err
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}
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return ipnet, "", nil
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case j == -1:
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// ip,domain
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str := strings.Split(s, ",")
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if len(str) != 2 {
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return nil, "", errors.New("malformed input")
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}
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d := strings.TrimSpace(str[1])
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if ip := net.ParseIP(str[0]); ip != nil {
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return &net.IPNet{IP: ip}, d, nil
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}
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return nil, d, nil
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}
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return nil, "", nil
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}
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func incrementIP(ip net.IP) {
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for j := len(ip) - 1; j >= 0; j-- {
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ip[j]++
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if ip[j] > 0 {
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break
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}
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}
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}
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func duplicateIP(ip net.IP) net.IP {
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dup := make(net.IP, len(ip))
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copy(dup, ip)
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return dup
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}
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