我希望有人已经在golang中实现了这一点,因为我甚至不擅长加密。然而,在将项目从php移植到golang时,我遇到了移植找到here的openssl_encrypt方法的问题。我也挖了source code一点点但没有用。
这是golang中implemented的方法。这给了我输出
lvb7JwaI4OCYUrdJMm8Q9uDd9rIILnvbZKJb/ozFbwCmLKkxoJN5Zf/ODOJ/RGq5
这是使用php时我需要的输出。
lvb7JwaI4OCYUrdJMm8Q9uDd9rIILnvbZKJb/ozFbwDV98XaJjvzEjBQp7jc+2DH
这是我用php生成它的函数。
$data = "This is some text I want to encrypt";
$method = "aes-256-cbc";
$password = "This is a really long key and su";
$options = 0;
$iv = "MMMMMMMMMMMMMMMM";
echo openssl_encrypt($data, $method, $password, $options, $iv);
对我来说,它看起来非常接近,我必须遗漏一些明显的东西。
答案 0 :(得分:4)
你非常接近,但你的填充错了。根据{{3}}(以及PHP文档),PHP使用默认的OpenSSL填充行为,即使用所需数量的填充字节作为填充字节值。
我做的唯一改变是:
copy(plaintextblock[length:], bytes.Repeat([]byte{uint8(extendBlock)}, extendBlock))
您可以看到完整更新的代码this answer。
答案 1 :(得分:1)
其他人在我玩它的时候打败了我,但是我有一个“更好”的固定版本的示例代码,也考虑到总是需要填充(至少模仿php代码的作用)
它还会显示您用于执行相同操作的openssl
命令行,如果可用,则运行它(当然操场不会)。
package main
import (
"crypto/aes"
"crypto/cipher"
"encoding/base64"
"fmt"
"log"
"os/exec"
"strings"
)
func main() {
const input = "This is some text I want to encrypt"
fmt.Println(opensslCommand(input))
fmt.Println(aesCBCenctypt(input))
}
func aesCBCenctypt(input string) string {
// Of course real IVs should be from crypto/rand
iv := []byte("MMMMMMMMMMMMMMMM")
// And real keys should be from something like PBKDF2, RFC 2898.
// E.g. use golang.org/x/crypto/pbkdf2 to turn a
// "passphrase" into a key.
key := []byte("This is a really long key and su")
// Make sure the block size is a multiple of aes.BlockSize
// Pad to aes.BlockSize using the pad length as the padding
// byte. If we would otherwise need no padding we instead
// pad an entire extra block.
pad := (aes.BlockSize - len(input)%aes.BlockSize)
if pad == 0 {
pad = aes.BlockSize
}
data := make([]byte, len(input)+pad)
copy(data, input)
for i := len(input); i < len(input)+pad; i++ {
data[i] = byte(pad)
}
cb, err := aes.NewCipher(key)
if err != nil {
log.Fatalln("error NewCipher():", err)
}
mode := cipher.NewCBCEncrypter(cb, iv)
mode.CryptBlocks(data, data)
return base64.StdEncoding.EncodeToString(data)
}
// Just for comparison, don't do this for real!
func opensslCommand(input string) string {
iv := []byte("MMMMMMMMMMMMMMMM")
key := []byte("This is a really long key and su")
args := []string{"enc", "-aes-256-cbc", "-base64"}
// "-nosalt", "-nopad"
args = append(args, "-iv", fmt.Sprintf("%X", iv))
args = append(args, "-K", fmt.Sprintf("%X", key))
cmd := exec.Command("openssl", args...)
// Show how you could do this via the command line:
fmt.Println("Command:", strings.Join(cmd.Args, " "))
cmd.Stdin = strings.NewReader(input)
result, err := cmd.CombinedOutput()
if err != nil {
if e, ok := err.(*exec.Error); ok && e.Err == exec.ErrNotFound {
// openssl not available
return err.Error() // XXX
}
// some other error, show it and the (error?) output and die
fmt.Println("cmd error:", err)
log.Fatalf("result %q", result)
}
// Strip trailing '\n' and return it.
if n := len(result) - 1; result[n] == '\n' {
result = result[:n]
}
return string(result)
}