Golang: sha256、base64編碼和解碼

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https://play.golang.org/p/qV0bTJSPLXm

package main

import (
    "crypto/sha256"
    "fmt"
)

func main(){
    s := "測試字串"

    h := sha256.New()
    h.Write([]byte(s))
    bs := h.Sum(nil)

    fmt.Printf("origin: %s, sha256 hash: %x\n", s, bs)
}

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https://play.golang.org/p/MtH80JUERdV

package main

import (
"encoding/base64"
"crypto/sha256"
"fmt"
)

func main() {

h := sha256.New()
h.Write([]byte(""))
b := h.Sum(nil)

s256, _ := fmt.Printf("%x", b)
fmt.Println(s256)

b64 := base64.StdEncoding.EncodeToString(b)
fmt.Println(b64)

decodeBytes, _ := base64.StdEncoding.DecodeString(b64)
s256d, _ := fmt.Printf("%x", decodeBytes)
fmt.Println(s256d)
}

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