75 lines
1.2 KiB
Go
75 lines
1.2 KiB
Go
package scsusers
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import (
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"crypto/rand"
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"encoding/base32"
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"log"
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mr "math/rand"
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"time"
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"unicode"
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)
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func flipCoin() bool {
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r := mr.New(mr.NewSource(time.Now().UnixNano()))
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return r.Intn(3) == 1
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}
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func scrambleCase(in []byte) []byte {
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var out []byte
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for _, x := range string(in) {
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if unicode.IsUpper(x) && flipCoin() {
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out = append(out, byte(unicode.ToLower(x)))
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} else {
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out = append(out, byte(x))
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}
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}
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log.Printf("scrambleCase in %s out %s", in, out)
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return out
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}
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func randBytes(n int) []byte {
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randomBytes := make([]byte, 32)
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_, err := rand.Read(randomBytes)
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if err != nil {
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panic(err)
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}
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return []byte(base32.StdEncoding.EncodeToString(randomBytes)[:n])
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}
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func generatePassword(n int) []byte {
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for {
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p := scrambleCase(randBytes(16))
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if hasDigit(p) && hasUppercase(p) && hasLowercase(p) {
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return p
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}
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}
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}
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func hasDigit(in []byte) bool {
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for _, x := range string(in) {
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if unicode.IsDigit(x) {
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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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func hasUppercase(in []byte) bool {
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for _, x := range string(in) {
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if unicode.IsUpper(x) {
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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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func hasLowercase(in []byte) bool {
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for _, x := range string(in) {
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if unicode.IsLower(x) {
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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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