apg-go/apg.go

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package main
import (
"flag"
"fmt"
"os"
)
// Constants
const DefaultPwLenght int = 20
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const VersionString string = "0.2.4"
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const PwLowerCharsHuman string = "abcdefghjkmnpqrstuvwxyz"
const PwUpperCharsHuman string = "ABCDEFGHJKMNPQRSTUVWXYZ"
const PwLowerChars string = "abcdefghijklmnopqrstuvwxyz"
const PwUpperChars string = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
const PwSpecialCharsHuman string = "\"#%*+-/:;=\\_|~"
const PwSpecialChars string = "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~"
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const PwNumbersHuman string = "23456789"
const PwNumbers string = "1234567890"
type cliOpts struct {
minPassLen int
maxPassLen int
numOfPass int
useComplex bool
useLowerCase bool
useUpperCase bool
useNumber bool
useSpecial bool
humanReadable bool
excludeChars string
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newStyleModes string
spellPassword bool
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showHelp bool
showVersion bool
outputMode int
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}
var config cliOpts
// Read flags
func init() {
// Bool flags
flag.BoolVar(&config.useLowerCase, "L", true, "Use lower case characters in passwords")
flag.BoolVar(&config.useUpperCase, "U", false, "Use upper case characters in passwords")
flag.BoolVar(&config.useNumber, "N", false, "Use numbers in passwords")
flag.BoolVar(&config.useSpecial, "S", false, "Use special characters in passwords")
flag.BoolVar(&config.useComplex, "C", false, "Generate complex passwords (implies -L -U -N -S, disables -H)")
flag.BoolVar(&config.spellPassword, "l", false, "Spell generated password")
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flag.BoolVar(&config.humanReadable, "H", false, "Generate human-readable passwords")
flag.BoolVar(&config.showVersion, "v", false, "Show version")
// Int flags
flag.IntVar(&config.minPassLen, "m", 10, "Minimum password length")
flag.IntVar(&config.maxPassLen, "x", DefaultPwLenght, "Maxiumum password length")
flag.IntVar(&config.numOfPass, "n", 1, "Number of passwords to generate")
// String flags
flag.StringVar(&config.excludeChars, "E", "", "Exclude list of characters from generated password")
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flag.StringVar(&config.newStyleModes, "M", "",
"New style password parameters (higher priority than single parameters)")
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flag.Parse()
if config.showVersion {
_, _ = os.Stderr.WriteString("Winni's Advanced Password Generator Clone (apg.go) v" + VersionString + "\n")
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os.Exit(0)
}
}
// Main function that generated the passwords and returns them
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func main() {
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parseParams()
pwLength := getPwLengthFromParams()
charRange := getCharRange()
for i := 1; i <= config.numOfPass; i++ {
pwString, err := getRandChar(&charRange, pwLength)
if err != nil {
fmt.Printf("getRandChar returned an error: %q\n", err.Error())
os.Exit(1)
}
switch config.outputMode {
case 1:
{
spelledPw, err := spellPasswordString(pwString)
if err != nil {
fmt.Printf("spellPasswordString returned an error: %q\n", err.Error())
os.Exit(1)
}
fmt.Printf("%v (%v)\n", pwString, spelledPw)
}
default:
{
fmt.Println(pwString)
break
}
}
}
}