今天在用Golang解析php那邊用Aes加密的一個key。網上大多是用base64將結果編碼一下。而且用到了向量。我php
那邊沒有用到向量。所以golang這邊也是要去掉的。參考網站的改了下。能夠和php通用。
另外，需要注意的是加密的key只能是16,24,32.分別對應的是AES-128,AES-192,AES-256等
package main
import (
"bytes"
"crypto/aes"
"crypto/cipher"
"encoding/base64"
"encoding/hex"
"errors"
"fmt"
)
//填充
func pad(src []byte) []byte {
padding := aes.BlockSize - len(src)%aes.BlockSize
padtext := bytes.Repeat([]byte{byte(padding)}, padding)
return append(src, padtext...)
}
func unpad(src []byte) ([]byte, error) {
length := len(src)
unpadding := int(src[length-1])
if unpadding > length {
return nil, errors.New("unpad error. This could happen when incorrect encryption key is used")
}
return src[:(length - unpadding)], nil
}
func encrypt(key []byte, text string) (string, error) {
block, err := aes.NewCipher(key)
if err != nil {
return "", err
}
msg := pad([]byte(text))
ciphertext := make([]byte, aes.BlockSize+len(msg))
//沒有向量，用的空切片
iv := make([]byte,aes.BlockSize)
mode := cipher.NewCBCEncrypter(block, iv)
mode.CryptBlocks(ciphertext[aes.BlockSize:], msg)
finalMsg := (base64.StdEncoding.EncodeToString(ciphertext))
fmt.Println(hex.EncodeToString([]byte(ciphertext[aes.BlockSize:])))
return finalMsg, nil
}
func decrypt(key []byte, text string) (string, error) {
block, err := aes.NewCipher(key)
if err != nil {
return "", err
}
decodedMsg,_ := hex.DecodeString(text)
iv :=make([]byte,aes.BlockSize)
msg := decodedMsg
mode := cipher.NewCBCDecrypter(block, iv)
mode.CryptBlocks(msg,msg)
unpadMsg, err := unpad(msg)
if err != nil {
return "", err
}
return string(unpadMsg), nil
}
func main() {
key := []byte("0123456789abcdef")
encryptText, _ := encrypt(key, "123456")
rawText, err := decrypt(key, "2994dc19badcd3e820065f4f8211f584")
fmt.Println("text %s \n", rawText)
}