我正在尝试在node.js中创建一个API，该API解密使用AES-GCM-256算法创建的输入，我在JAVA中使用相同的算法来加密代码，但我无法对其进行解密使用node.js
我尝试了许多方法，但是我可能卡在了标签上，并且出现错误“状态不受支持或无法验证数据”
我的Java代码：
import java.security.SecureRandom;
import java.util.Arrays;
import java.util.Base64;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.GCMParameterSpec;
import javax.crypto.spec.SecretKeySpec;
public class AES256GCMAlgo {
static String plainText = "This is a plain text which need to be encrypted by Java AES 256 GCM Encryption Algorithm";
public static final int AES_KEY_SIZE = 256;
public static final int GCM_IV_LENGTH = 12;
public static final int GCM_TAG_LENGTH = 16;
public static void main(String[] args) throws Exception
{
KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
keyGenerator.init(AES_KEY_SIZE);
// Generate Key
SecretKey key = keyGenerator.generateKey();
byte[] IV = new byte[GCM_IV_LENGTH];
SecureRandom random = new SecureRandom();
random.nextBytes(IV);
byte[] encoded = key.getEncoded();
String output = Base64.getEncoder().withoutPadding().encodeToString(encoded);
System.out.println("Keep it secret, keep it safe! " + output);
String ivoutput = Base64.getEncoder().withoutPadding().encodeToString(IV);
System.out.println("Keep ivoutput secret, keep it safe! " + ivoutput);
System.out.println("Original Text : " + plainText);
byte[] cipherText = encrypt(plainText.getBytes(), key, IV);
byte[] tagVal = Arrays.copyOfRange(cipherText, cipherText.length - (128 / Byte.SIZE), cipherText.length);
System.out.println("Encrypted Text : " + Base64.getEncoder().encodeToString(cipherText));
System.out.println("Tag Text : " + Base64.getEncoder().encodeToString(tagVal));
String input = output ;
byte[] deencoded = Base64.getDecoder().decode(output);
SecretKey aesKey = new SecretKeySpec(deencoded, "AES");
String ivinput = ivoutput;
byte[] ivdeencoded = Base64.getDecoder().decode(ivinput);
String decryptedText = decrypt(cipherText, aesKey, ivdeencoded);
System.out.println("DeCrypted Text : " + decryptedText);
}
public static byte[] encrypt(byte[] plaintext, SecretKey key, byte[] IV) throws Exception
{
// Get Cipher Instance
Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
// Create SecretKeySpec
SecretKeySpec keySpec = new SecretKeySpec(key.getEncoded(), "AES");
// Create GCMParameterSpec
GCMParameterSpec gcmParameterSpec = new GCMParameterSpec(GCM_TAG_LENGTH * 8, IV);
// Initialize Cipher for ENCRYPT_MODE
cipher.init(Cipher.ENCRYPT_MODE, keySpec, gcmParameterSpec);
// Perform Encryption
byte[] cipherText = cipher.doFinal(plaintext);
return cipherText;
}
public static String decrypt(byte[] cipherText, SecretKey key, byte[] IV) throws Exception
{
// Get Cipher Instance
Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
// Create SecretKeySpec
SecretKeySpec keySpec = new SecretKeySpec(key.getEncoded(), "AES");
// Create GCMParameterSpec
GCMParameterSpec gcmParameterSpec = new GCMParameterSpec(GCM_TAG_LENGTH * 8, IV);
// Initialize Cipher for DECRYPT_MODE
cipher.init(Cipher.DECRYPT_MODE, keySpec, gcmParameterSpec);
// Perform Decryption
byte[] decryptedText = cipher.doFinal(cipherText);
return new String(decryptedText);
}
}
我的Node.js代码
const crypto = require('crypto');
// input created by running above program in java
const ed = 'OGtANbvTLY6Cme2VNAxsiIhBLLwl29oVX7zC5DGmmq4hU/VqNKaGQuSp1Q8liQ94cW/B96OJoJJ2r67jRlQFI4qHCTWFU2qQ8QaNj6WehdVLsf5mDK2aMYjc/vXd1ha/cElMBzFaIp9g==='
const key = 'HuzPEZgzqKOo8VwlnYhNUaPWTWSVDRQ2bMtY6aJAp8I'
const iv = 'kg5ILA0826hrew5w'
const tag = 'jc/vXd1ha/cElMBzFaIp9g==' // last 16 bytes extracted in java
function decrypt(encrypted, ik, iiv, it) {
let bData = Buffer.from(encrypted, 'base64');
// console.log(bData.length,bData.length - 64)
let tag1 = Buffer.from(tag, 'base64');
// let tag1 = bData.slice((bData.length - 16),bData.length) // also tried slicing last 16 bytes of buffer
console.log('00000000',tag1.length)
let iv1 = Buffer.from(iiv, 'base64');
let key1 = new Buffer(ik, 'base64');
console.log('aaaaaaaaa')
let decipher = crypto.createDecipheriv('aes-256-gcm', key1, iv1)
console.log('bbbbbbbbbbbbb')
decipher.setAuthTag(tag1);
console.log('ccccccc')
let dec = decipher.update(encrypted, 'binary', 'utf8')
dec += decipher.final('utf8');
return dec;
}
console.log('devryptedddddd',decrypt(ed,key,iv,tag))
我应该在node.js的控制台中收到“这是纯文本，需要通过Java AES 256 GCM加密算法进行加密”，但是我收到“不受支持的状态或无法验证数据”错误。 请帮忙。
答案 0 :(得分：2)
您使用的“ ed”不是该明文，键和IV的Java代码的输出。我得到的值在base64
OGtANbvTLY6Cme2VNAxsiIhBLLwl29oVX7zC5DGmmq4hU/VqNKaGQuSp1Q8liQ94cW/B96OJoJJ2r67jRlQFI4qHCTWFU2qQ8QaNj6WehdVLsf5mDK2aMY3P713dYWv3BJTAcxWiKfY=
（最后22个字符不同）。但是，该值不是在nodejs中使用的正确值。 Java加密将GCM标记作为密文的最后N个字节返回，您已将其正确地从那里复制到了一个单独的变量，但是您没有将其从密文中删除。在nodejs中使用的正确密文在base64中：
OGtANbvTLY6Cme2VNAxsiIhBLLwl29oVX7zC5DGmmq4hU/VqNKaGQuSp1Q8liQ94cW/B96OJoJJ2r67jRlQFI4qHCTWFU2qQ8QaNj6WehdVLsf5mDK2aMQ==
（短20个字符，最后3个字符不同）。
最后，您的nodejs执行bData = Buffer.from(encrypted, 'base64')，但随后忽略bData并执行decipher.update(encrypted, 'binary', 'utf8') －使用base64字符串作为二进制，但不是。有了这两个更改：
const crypto = require('crypto');
const ed = 'OGtANbvTLY6Cme2VNAxsiIhBLLwl29oVX7zC5DGmmq4hU/VqNKaGQuSp1Q8liQ94cW/B96OJoJJ2r67jRlQFI4qHCTWFU2qQ8QaNj6WehdVLsf5mDK2aMQ=='
const key = 'HuzPEZgzqKOo8VwlnYhNUaPWTWSVDRQ2bMtY6aJAp8I'
const iv = 'kg5ILA0826hrew5w'
const tag = 'jc/vXd1ha/cElMBzFaIp9g==' // last 16 bytes extracted in java
function decrypt(encrypted, ik, iiv, it) {
let bData = Buffer.from(encrypted, 'base64');
let tag1 = Buffer.from(tag, 'base64');
let iv1 = Buffer.from(iiv, 'base64');
let key1 = new Buffer(ik, 'base64');
let decipher = crypto.createDecipheriv('aes-256-gcm', key1, iv1)
decipher.setAuthTag(tag1);
let dec = decipher.update(bData, 'utf8')
dec += decipher.final('utf8');
return dec;
}
console.log(decrypt(ed,key,iv,tag))
我得到了正确的输出，但是还警告了new Buffer()（用于key1）已过时；现在首选使用Buffer.from，就像您用于其他变量一样。