package main
import (
crypto "crypto/rand"
"fmt"
"math/big"
"math/rand"
)
func main() {
sec1 := rand.New(rand.NewSource(10))
sec2 := rand.New(rand.NewSource(10))
for i := 0; i < 5; i++ {
rnd1 := sec1.Int()
rnd2 := sec2.Int()
if rnd1 != rnd2 {
fmt.Println("Rand generated non-equal sequence")
break
} else {
fmt.Printf("Math/Rand1: %d , Math/Rand2: %d\n", rnd1, rnd2)
}
}
for i := 0; i < 5; i++ {
safeNum := NewCryptoRand()
safeNum2 := NewCryptoRand()
if safeNum == safeNum2 {
fmt.Println("Crypto generated equal numbers")
break
} else {
fmt.Printf("Crypto/Rand1: %d , Crypto/Rand2: %d\n", safeNum, safeNum2)
}
}
}
func NewCryptoRand() int64 {
safeNum, err := crypto.Int(crypto.Reader, big.NewInt(100234))
if err != nil {
panic(err)
}
return safeNum.Int64()
}
/*
Math/Rand1: 5221277731205826435 , Math/Rand2: 5221277731205826435
Math/Rand1: 3852159813000522384 , Math/Rand2: 3852159813000522384
Math/Rand1: 8532807521486154107 , Math/Rand2: 8532807521486154107
Math/Rand1: 3888302351045490779 , Math/Rand2: 3888302351045490779
Math/Rand1: 4512466281294657143 , Math/Rand2: 4512466281294657143
Crypto/Rand1: 8037 , Crypto/Rand2: 39548
Crypto/Rand1: 70036 , Crypto/Rand2: 36267
Crypto/Rand1: 57332 , Crypto/Rand2: 51974
Crypto/Rand1: 71516 , Crypto/Rand2: 5445
Crypto/Rand1: 62317 , Crypto/Rand2: 61380
*/
