使用golang解密用php openssl_encrypt加密的文件

首先 . 我在这里薄冰！

我有一个加密文件，我从PHP获得 . 我试图用golang解密这个 .

php应用程序使用公共RSA密钥加密用于使用aes-256-cbc加密的密钥 .

我已经创建了一些概念代码证明，但我无法做到正确 . 即使键和副本看起来都是正确的，但有些东西却没有 . 结果就是垃圾 . 我怀疑某些编码不匹配（期望base64，获取字符串字节......某些东西）或者我误解了一些概念 .

加密：

<?php

$cipher = "AES-256-CBC";
$ivLength = openssl_cipher_iv_length($cipher="AES-256-CBC");
echo "iv len: " . $ivLength . "\n";
$iv = openssl_random_pseudo_bytes($ivLength);
$key = "1234567890abcdef";

$ciphertext = openssl_encrypt("hello world", $cipher, $key, 0, $iv);

$publicKey = openssl_pkey_get_public(file_get_contents("some-public-key.pub"));
if (!$publicKey) {
   die("OpenSSL: Unable to get public key for encryption. Is the location correct? Does this key require a password?");
}

$ok = openssl_public_encrypt($key, $encryptedKey, $publicKey);
if (!$ok) {
    die("Encryption failed. Ensure you are using a PUBLIC key.");
}

echo "key unencrypted: " . $key . "\n";
echo "iv: " . base64_encode($iv) . "\n";
echo "ciphertext: " . $ciphertext . "\n";
echo "ciphertext binary: " . (base64_decode($ciphertext)) . "\n";
echo "combined: " . ($iv . $ciphertext) . "\n";

file_put_contents("key.enc", $encryptedKey);
file_put_contents("content.enc", $iv . $ciphertext);
file_put_contents("content.dec", openssl_decrypt($ciphertext, $cipher, $key, 0, $iv));

openssl_free_key($publicKey);
?>

解密：

package main

import (
    "crypto/aes"
    "crypto/cipher"
    "crypto/rand"
    "crypto/rsa"
    "crypto/x509"
    "encoding/base64"
    "encoding/hex"
    "encoding/pem"
    "fmt"
    "io"
    "io/ioutil"
    "log"
)

func main() {

    // Read the input file
    in, err := ioutil.ReadFile("key.enc")
    if err != nil {
        log.Fatalf("input file: %s", err)
    }

    // Read the private key
    pemData, err := ioutil.ReadFile("some-private-key")
    if err != nil {
        log.Fatalf("read key file: %s", err)
    }

    // Extract the PEM-encoded data block
    block, _ := pem.Decode(pemData)
    if block == nil {
        log.Fatalf("bad key data: %s", "not PEM-encoded")
    }
    if got, want := block.Type, "RSA PRIVATE KEY"; got != want {
        log.Fatalf("unknown key type %q, want %q", got, want)
    }

    // Decode the RSA private key
    priv, err := x509.ParsePKCS1PrivateKey(block.Bytes)
    if err != nil {
        log.Fatalf("bad private key: %s", err)
    }

    // Decrypt the data
    cipherKey, err := rsa.DecryptPKCS1v15(rand.Reader, priv, in)
    if err != nil {
        log.Fatalf("decrypt: %s", err)
    }

    fmt.Println("Key decrypted:", string(cipherKey))

    // Read encrypted content file
    content, err := ioutil.ReadFile("content.enc")
    if err != nil {
        log.Fatalf("input file: %s", err)
    }

    fmt.Println("Cipherkey: ", string(cipherKey))
    cipherText := content

    cipherBlock, err := aes.NewCipher(cipherKey)
    if err != nil {
        panic(err)
    }

    iv := cipherText[:aes.BlockSize]
    fmt.Println("iv:", base64.StdEncoding.EncodeToString(iv))
    fmt.Println("ciphertext:", string(cipherText[aes.BlockSize:]))
    cipherText, _ = base64.StdEncoding.DecodeString(string(cipherText[aes.BlockSize:]))
    fmt.Println("ciphertext binary: ", string(cipherText))

    // CBC mode always works in whole blocks.
    if len(cipherText)%aes.BlockSize != 0 {
        panic(fmt.Sprintf("ciphertext (len=%d) is not a multiple of the block size (%d)", len(cipherText), aes.BlockSize))
    }

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

    fmt.Printf("The result: %s\n", cipherText)
}

这是执行此操作的一些示例输出（首先是php，然后是go）：

iv len: 16
key unencrypted: 1234567890abcdef
iv: QffXbVRuwyopwwvQXQ8N6g==
ciphertext: Wk8Gv1xQWikp1YryQiywgQ==
ciphertext binary: ZO�\PZ))Պ�B,��
combined: A��mTn�*)�
�Wk8Gv1xQWikp1YryQiywgQ==
-----
Key decrypted: 1234567890abcdef
Cipherkey:  1234567890abcdef
iv: QffXbVRuwyopwwvQXQ8N6g==
ciphertext: Wk8Gv1xQWikp1YryQiywgQ==
ciphertext binary:  ZO�\PZ))Պ�B,��
The result: ��2��J���~A�D