解密用PHP加密的AES-CBC-256 Mcrypt_RIJNDAEL在GOLang上解密

Question

private $CIPHER_KEY = "12345678901234567890123456789012";

    private function Encrypt($toEncrypt=null){
        $iv_size = $this->ivSize = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC);
        $iv = $this->ivKey = mcrypt_create_iv($iv_size, MCRYPT_RAND);
        $this->B64IV = base64_encode($iv);
        return base64_encode($iv . mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $this->CIPHER_KEY, $toEncrypt, MCRYPT_MODE_CBC, $iv));
    }

KEY: 12345678901234567890123456789012
IV: Egu4tSySXluBLi5dcMzHbZHVSOS7jdNwUKUFlZ8dL1w=
ENC: Egu4tSySXluBLi5dcMzHbZHVSOS7jdNwUKUFlZ8dL1yATFjg26/Nav7cWtlJJL3djhUCND6KV8r/JL7owboKFA==
IV Size: 32

mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC); return 32

func main(){
   key := []byte("12345678901234567890123456789012")

   iv,_ := base64.StdEncoding.DecodeString("Egu4tSySXluBLi5dcMzHbZHVSOS7jdNwUKUFlZ8dL1w=")
   encText,_  := base64.StdEncoding.DecodeString("Egu4tSySXluBLi5dcMzHbZHVSOS7jdNwUKUFlZ8dL1yATFjg26/Nav7cWtlJJL3djhUCND6KV8r/JL7owboKFA==")
//   iv := encText[:32] // also tried to get the iv from encoded string


   fmt.Printf("Key Len: %d\nIV  Len: %d\nENC Len: %d\n",len(key),len(iv),len(encText))

    block, err := aes.NewCipher(key)
    if err != nil {
        panic(err)
    }

    if len(encText) < aes.BlockSize {
        panic("cipherText too short")
    }

    cipherText := encText[32:]
    if len(cipherText)%aes.BlockSize != 0 {
        panic("cipherText is not a multiple of the block size")
    }

    mode := cipher.NewCBCDecrypter(block, iv)
    mode.CryptBlocks(cipherText, cipherText)

    cipherText, _ = pkcs7.Unpad(cipherText, aes.BlockSize)

   fmt.Printf("Dec: %s\n",cipherText)

}

Answer 1

import (
  "fmt"
  "github.com/tblyler/go-mcrypt"
  "encoding/base64"
)

const (
   KEY = "12345678901234567890123456789012"
   ENC = "Egu4tSySXluBLi5dcMzHbZHVSOS7jdNwUKUFlZ8dL1yATFjg26/Nav7cWtlJJL3djhUCND6KV8r/JL7owboKFA=="
)

func main(){
    encText, _ := base64.StdEncoding.DecodeString(ENC)

    iv := encText[:32]
    toDecrypt := encText[32:]

    fmt.Printf("Key Len: %d\n",len(KEY))
    fmt.Printf("IV  Len: %d\n",len(iv))

    decText, err := mcrypt.Decrypt([]byte(KEY),iv,[]byte(toDecrypt))
    if err != nil { panic(err) }

    fmt.Printf("%s\n",decText)
}