EtherGuard-VPN/mtypes/functions.go

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package mtypes
import (
"bytes"
"compress/gzip"
"crypto/rand"
"fmt"
"io/ioutil"
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nonSecureRand "math/rand"
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"time"
)
func S2TD(secs float64) time.Duration {
return time.Duration(secs * float64(time.Second))
}
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func RandomStr(length int, defaults string) (ret string) {
bytes := RandomBytes(length, []byte(defaults))
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for i, b := range bytes {
bytes[i] = chars[b%byte(len(chars))]
}
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ret = string(bytes)
return
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}
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func RandomBytes(length int, defaults []byte) (ret []byte) {
var err error
ret = make([]byte, length)
_, err = rand.Read(ret)
if err == nil {
return
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}
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_, err = nonSecureRand.Read(ret)
if err == nil {
return
}
if len(defaults) < length {
copy(ret, defaults[:length])
}
return
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}
func ByteSlice2Byte32(bytes []byte) (ret [32]byte) {
if len(bytes) != 32 {
fmt.Println("Not a 32 len byte")
}
copy(ret[:], bytes)
return
}
func Gzip(bytesIn []byte) (ret []byte) {
var b bytes.Buffer
w := gzip.NewWriter(&b)
w.Write([]byte(bytesIn))
w.Close()
return b.Bytes()
}
func GUzip(bytesIn []byte) (ret []byte, err error) {
b := bytes.NewReader(bytesIn)
r, err := gzip.NewReader(b)
if err != nil {
return
}
return ioutil.ReadAll(r)
}