mirror of
https://github.com/wneessen/apg-go.git
synced 2024-12-23 11:40:38 +01:00
Merge pull request #1 from wneessen/dev
v0.2.3: More chars, cleanup and better test coverage
This commit is contained in:
GitHub
commit
01782c228e
2 changed files with 273 additions and 48 deletions
67
apg.go
67
apg.go
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@ -4,7 +4,6 @@ import (
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"crypto/rand"
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"flag"
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"fmt"
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"log"
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"math/big"
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"os"
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"regexp"
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@ -12,13 +11,13 @@ import (
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// Constants
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const DefaultPwLenght int = 20
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const VersionString string = "0.2.2"
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const VersionString string = "0.2.3"
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const PwLowerCharsHuman string = "abcdefghjkmnpqrstuvwxyz"
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const PwUpperCharsHuman string = "ABCDEFGHJKMNPQRSTUVWXYZ"
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const PwLowerChars string = "abcdefghijklmnopqrstuvwxyz"
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const PwUpperChars string = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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const PwSpecialCharsHuman string = "\"#/\\$%&+-*"
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const PwSpecialChars string = "\"#/!\\$%&+-*.,?=()[]{}:;~^|"
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const PwSpecialCharsHuman string = "\"#%*+-/:;=\\_|~"
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const PwSpecialChars string = "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~"
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const PwNumbersHuman string = "23456789"
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const PwNumbers string = "1234567890"
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@ -60,11 +59,12 @@ func init() {
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flag.Parse()
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if config.showVersion {
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_, _ = os.Stderr.WriteString("Advanced Password Generator v" + VersionString + "\n")
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_, _ = os.Stderr.WriteString("Winni's Advanced Password Generator Clone (apg.go) v" + VersionString + "\n")
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os.Exit(0)
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}
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}
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// Main function that generated the passwords and returns them
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func main() {
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pwLength := config.minPassLen
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if pwLength < config.minPassLen {
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@ -81,6 +81,20 @@ func main() {
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config.humanReadable = false
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}
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charRange := getCharRange()
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for i := 1; i <= config.numOfPass; i++ {
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pwString, err := getRandChar(&charRange, pwLength)
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if err != nil {
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fmt.Printf("getRandChar returned an error: %q\n", err.Error())
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os.Exit(1)
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}
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fmt.Println(pwString)
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}
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}
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// Provide the range of available characters based on provided parameters
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func getCharRange() string {
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pwUpperChars := PwUpperChars
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pwLowerChars := PwLowerChars
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pwNumbers := PwNumbers
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@ -110,29 +124,48 @@ func main() {
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charRange = regExp.ReplaceAllLiteralString(charRange, "")
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}
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for i := 1; i <= config.numOfPass; i++ {
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pwString := getRandChar(&charRange, pwLength)
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fmt.Println(pwString)
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}
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return charRange
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}
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func getRandChar(charRange *string, pwLength int) string {
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// Generate random characters based on given character range
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// and password length
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func getRandChar(charRange *string, pwLength int) (string, error) {
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if pwLength <= 0 {
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err := fmt.Errorf("provided pwLength value is <= 0: %v", pwLength)
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return "", err
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}
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availCharsLength := len(*charRange)
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charSlice := []byte(*charRange)
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returnString := []byte{}
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returnString := make([]byte, pwLength)
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for i := 0; i < pwLength; i++ {
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randNum := getRandNum(availCharsLength)
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returnString = append(returnString, charSlice[randNum])
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randNum, err := getRandNum(availCharsLength)
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if err != nil {
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return "", err
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}
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returnString[i] = charSlice[randNum]
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}
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return string(returnString)
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return string(returnString), nil
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}
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func getRandNum(maxNum int) int {
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// Generate a random number with given maximum value
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func getRandNum(maxNum int) (int, error) {
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if maxNum <= 0 {
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err := fmt.Errorf("provided maxNum is <= 0: %v", maxNum)
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return 0, err
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}
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maxNumBigInt := big.NewInt(int64(maxNum))
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if !maxNumBigInt.IsUint64() {
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err := fmt.Errorf("big.NewInt() generation returned negative value: %v", maxNumBigInt)
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return 0, err
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}
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randNum64, err := rand.Int(rand.Reader, maxNumBigInt)
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if err != nil {
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log.Fatalf("An error occured generating random number: %v", err)
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return 0, err
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}
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randNum := int(randNum64.Int64())
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return randNum
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if randNum < 0 {
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err := fmt.Errorf("generated random number does not fit as int64: %v", randNum64)
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return 0, err
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}
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return randNum, nil
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}
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254
apg_test.go
254
apg_test.go
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@ -1,6 +1,9 @@
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package main
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import "testing"
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import (
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"math/big"
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"testing"
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)
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// Make sure the flags are initalized
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var _ = func() bool {
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@ -9,45 +12,224 @@ var _ = func() bool {
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}()
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// Test getRandNum with max 1000
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func TestGetRandNumMax1000(t *testing.T) {
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randNum := getRandNum(1000)
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if randNum > 1000 {
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t.Errorf("Generated random number between 0 and 1000 is too big: %d", randNum)
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}
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if randNum < 0 {
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t.Errorf("Generated random number between 0 and 1000 is too small: %d", randNum)
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}
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}
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// Test getRandNum with max 1
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func TestGetRandNumMax1(t *testing.T) {
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randNum := getRandNum(1)
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if randNum > 1 {
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t.Errorf("Generated random number between 0 and 1 is too big: %d", randNum)
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}
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if randNum < 0 {
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t.Errorf("Generated random number between 0 and 1 is too small: %d", randNum)
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}
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func TestGetRandNum(t *testing.T) {
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t.Run("maxNum_is_1000", func(t *testing.T) {
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randNum, err := getRandNum(1000)
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if err != nil {
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t.Errorf("Random number generation failed: %v", err.Error())
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}
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if randNum > 1000 {
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t.Errorf("Generated random number between 0 and 1000 is too big: %v", randNum)
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}
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if randNum < 0 {
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t.Errorf("Generated random number between 0 and 1000 is too small: %v", randNum)
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}
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})
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t.Run("maxNum_is_1", func(t *testing.T) {
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randNum, err := getRandNum(1)
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if err != nil {
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t.Errorf("Random number generation failed: %v", err.Error())
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}
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if randNum > 1 {
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t.Errorf("Generated random number between 0 and 1000 is too big: %v", randNum)
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}
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if randNum < 0 {
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t.Errorf("Generated random number between 0 and 1000 is too small: %v", randNum)
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}
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})
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t.Run("maxNum_is_0", func(t *testing.T) {
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randNum, err := getRandNum(0)
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if err == nil {
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t.Errorf("Random number expected to fail, but provided a value instead: %v", randNum)
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}
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})
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}
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// Test getRandChar
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func TestGetRandChar(t *testing.T) {
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charRange := "ABC"
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randChar := getRandChar(&charRange, 1)
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if randChar != "A" && randChar != "B" && randChar != "C" {
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t.Errorf("Random character generation failed. Expected A, B or C but got: %v", randChar)
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}
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t.Run("return_value_is_A_B_or_C", func(t *testing.T) {
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charRange := "ABC"
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randChar, err := getRandChar(&charRange, 1)
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if err != nil {
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t.Errorf("Random character generation failed => %v", err.Error())
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}
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if randChar != "A" && randChar != "B" && randChar != "C" {
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t.Errorf("Random character generation failed. Expected A, B or C but got: %v", randChar)
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}
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})
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randChar = getRandChar(&charRange, 1000)
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if len(randChar) != 1000 {
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t.Errorf("Generated random characters with 1000 chars returned wrong amount of chars: %v", len(randChar))
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}
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t.Run("return_value_has_specific_length", func(t *testing.T) {
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charRange := "ABC"
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randChar, err := getRandChar(&charRange, 1000)
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if err != nil {
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t.Errorf("Random character generation failed => %v", err.Error())
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}
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if len(randChar) != 1000 {
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t.Errorf("Generated random characters with 1000 chars returned wrong amount of chars: %v",
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len(randChar))
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}
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})
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t.Run("fail", func(t *testing.T) {
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charRange := "ABC"
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randChar, err := getRandChar(&charRange, -2000)
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if err == nil {
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t.Errorf("Generated random characters expected to fail, but returned a value => %v",
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randChar)
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}
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})
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}
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// Test getCharRange() with different config settings
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func TestGetCharRange(t *testing.T) {
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t.Run("lower_case_only", func(t *testing.T) {
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// Lower case only
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allowedBytes := []int{'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r',
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's', 't', 'u', 'v', 'w', 'x', 'y', 'z'}
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config.useLowerCase = true
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charRange := getCharRange()
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for _, curChar := range charRange {
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searchAllowedBytes := containsByte(allowedBytes, int(curChar))
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if !searchAllowedBytes {
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t.Errorf("Character range for lower-case only returned invalid value: %v",
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string(curChar))
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}
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}
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})
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// Lower case only (human readable)
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t.Run("lower_case_only_human_readable", func(t *testing.T) {
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allowedBytes := []int{'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'j', 'k', 'm', 'n', 'p', 'q', 'r',
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's', 't', 'u', 'v', 'w', 'x', 'y', 'z'}
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config.humanReadable = true
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charRange := getCharRange()
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for _, curChar := range charRange {
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searchAllowedBytes := containsByte(allowedBytes, int(curChar))
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if !searchAllowedBytes {
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t.Errorf("Character range for lower-case only (human readable) returned invalid value: %v",
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string(curChar))
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}
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}
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})
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// Upper case only
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t.Run("upper_case_only", func(t *testing.T) {
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allowedBytes := []int{'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R',
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'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'}
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config.humanReadable = false
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config.useLowerCase = false
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config.useUpperCase = true
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charRange := getCharRange()
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for _, curChar := range charRange {
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searchAllowedBytes := containsByte(allowedBytes, int(curChar))
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if !searchAllowedBytes {
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t.Errorf("Character range for upper-case only returned invalid value: %v",
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string(curChar))
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}
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}
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})
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// Upper case only (human readable)
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t.Run("upper_case_only_human_readable", func(t *testing.T) {
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allowedBytes := []int{'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'M', 'N', 'P', 'Q',
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'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'}
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config.humanReadable = true
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charRange := getCharRange()
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for _, curChar := range charRange {
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searchAllowedBytes := containsByte(allowedBytes, int(curChar))
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if !searchAllowedBytes {
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t.Errorf("Character range for upper-case only (human readable) returned invalid value: %v",
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string(curChar))
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}
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}
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})
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// Numbers only
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t.Run("numbers_only", func(t *testing.T) {
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allowedBytes := []int{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'}
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config.humanReadable = false
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config.useUpperCase = false
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config.useNumber = true
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charRange := getCharRange()
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for _, curChar := range charRange {
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searchAllowedBytes := containsByte(allowedBytes, int(curChar))
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if !searchAllowedBytes {
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t.Errorf("Character range for numbers only returned invalid value: %v",
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string(curChar))
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}
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}
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})
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// Numbers only (human readable)
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t.Run("numbers_only_human_readable", func(t *testing.T) {
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allowedBytes := []int{'2', '3', '4', '5', '6', '7', '8', '9'}
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config.humanReadable = true
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charRange := getCharRange()
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for _, curChar := range charRange {
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searchAllowedBytes := containsByte(allowedBytes, int(curChar))
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if !searchAllowedBytes {
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t.Errorf("Character range for numbers (human readable) only returned invalid value: %v",
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string(curChar))
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}
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}
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})
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// Special characters only
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t.Run("special_chars_only", func(t *testing.T) {
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allowedBytes := []int{'!', '"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', '/', ':',
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';', '<', '=', '>', '?', '@', '[', '\\', ']', '^', '_', '`', '{', '|', '}', '~'}
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config.humanReadable = false
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config.useNumber = false
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config.useSpecial = true
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charRange := getCharRange()
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for _, curChar := range charRange {
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searchAllowedBytes := containsByte(allowedBytes, int(curChar))
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if !searchAllowedBytes {
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t.Errorf("Character range for special characters only returned invalid value: %v",
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string(curChar))
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}
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}
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})
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// Special characters only (human readable)
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t.Run("special_chars_only_human_readable", func(t *testing.T) {
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allowedBytes := []int{'"', '#', '%', '*', '+', '-', '/', ':', ';', '=', '\\', '_', '|', '~'}
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config.humanReadable = true
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charRange := getCharRange()
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for _, curChar := range charRange {
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searchAllowedBytes := containsByte(allowedBytes, int(curChar))
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if !searchAllowedBytes {
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t.Errorf("Character range for special characters only returned invalid value: %v",
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string(curChar))
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}
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}
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})
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}
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// Forced failures
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func TestForceFailures(t *testing.T) {
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t.Run("too_big_big.NewInt_value", func(t *testing.T) {
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maxNum := 9223372036854775807
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maxNumBigInt := big.NewInt(int64(maxNum) + 1)
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if maxNumBigInt.IsUint64() {
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t.Errorf("Calling big.NewInt() with too large number expected to fail: %v", maxNumBigInt)
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}
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})
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t.Run("negative value for big.NewInt()", func(t *testing.T) {
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randNum, err := getRandNum(-20000)
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if err == nil {
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t.Errorf("Calling getRandNum() with negative value is expected to fail, but returned value: %v",
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randNum)
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}
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})
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}
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// Benchmark: Random number generation
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func BenchmarkGetRandNum(b *testing.B) {
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for i := 0; i < b.N; i++ {
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getRandNum(100000)
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_, _ = getRandNum(100000)
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}
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}
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@ -55,6 +237,16 @@ func BenchmarkGetRandNum(b *testing.B) {
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func BenchmarkGetRandChar(b *testing.B) {
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charRange := "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890\"#/!\\$%&+-*.,?=()[]{}:;~^|"
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for i := 0; i < b.N; i++ {
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getRandChar(&charRange, 20)
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_, _ = getRandChar(&charRange, 20)
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}
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}
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// Contains function to search a given slice for values
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func containsByte(allowedBytes []int, currentChar int) bool {
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for _, charInt := range allowedBytes {
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if charInt == currentChar {
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return true
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}
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}
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return false
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}
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