我使用Java AES/CBC/PKCS5Padding
API生成128位javax.crypto
密钥。这是我使用的算法:
public static String encryptAES(String data, String secretKey) {
try {
byte[] secretKeys = Hashing.sha1().hashString(secretKey, Charsets.UTF_8)
.toString().substring(0, 16)
.getBytes(Charsets.UTF_8);
final SecretKey secret = new SecretKeySpec(secretKeys, "AES");
final Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, secret);
final AlgorithmParameters params = cipher.getParameters();
final byte[] iv = params.getParameterSpec(IvParameterSpec.class).getIV();
final byte[] cipherText = cipher.doFinal(data.getBytes(Charsets.UTF_8));
return DatatypeConverter.printHexBinary(iv) + DatatypeConverter.printHexBinary(cipherText);
} catch (Exception e) {
throw Throwables.propagate(e);
}
}
public static String decryptAES(String data, String secretKey) {
try {
byte[] secretKeys = Hashing.sha1().hashString(secretKey, Charsets.UTF_8)
.toString().substring(0, 16)
.getBytes(Charsets.UTF_8);
// grab first 16 bytes - that's the IV
String hexedIv = data.substring(0, 32);
// grab everything else - that's the cipher-text (encrypted message)
String hexedCipherText = data.substring(32);
byte[] iv = DatatypeConverter.parseHexBinary(hexedIv);
byte[] cipherText = DatatypeConverter.parseHexBinary(hexedCipherText);
final Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(secretKeys, "AES"), new IvParameterSpec(iv));
return new String(cipher.doFinal(cipherText), Charsets.UTF_8);
} catch (BadPaddingException e) {
throw new IllegalArgumentException("Secret key is invalid");
}catch (Exception e) {
throw Throwables.propagate(e);
}
}
我可以使用secretKey轻松地使用这些方法加密和解密消息。由于Java默认情况下具有128位AES加密,因此它使用SHA1生成原始密钥的散列,并将散列的前16个字节用作AES中的密钥。然后它以HEX格式转储IV和cipherText。
例如encryptAES("test", "test")
生成CB5E759CE5FEAFEFCC9BABBFD84DC80C0291ED4917CF1402FF03B8E12716E44C
,我想用CryptoJS解密此密钥。
这是我的尝试:
var str = 'CB5E759CE5FEAFEFCC9BABBFD84DC80C0291ED4917CF1402FF03B8E12716E44C';
CryptJS.AES.decrypt(
CryptJS.enc.Hex.parse(str.substring(32)),
CryptJS.SHA1("test").toString().substring(0,16),
{
iv: CryptJS.enc.Hex.parse(str.substring(0,32)),
mode: CryptJS.mode.CBC,
formatter: CryptJS.enc.Hex,
blockSize: 16,
padding: CryptJS.pad.Pkcs7
}).toString()
但是它返回一个空字符串。
答案 0 :(得分:5)
问题是您使用64位密钥作为128位。 Hashing.sha1().hashString(secretKey, Charsets.UTF_8)
是HashCode
的一个实例,其toString
方法描述如下:
按顺序返回包含asBytes()每个字节的字符串,作为小写的两位无符号十六进制数。
这是一个十六进制编码的字符串。如果只使用该字符串的16个字符并将其用作键,则只有64位熵而不是128位。你真的应该直接使用HashCode#asBytes()
。
无论如何,CryptoJS代码的问题有很多:
CipherParams
对象,但如果它在ciphertext
属性中包含密文字节作为WordArray就足够了。这是与破坏的Java代码兼容的CryptoJS代码:
var str = 'CB5E759CE5FEAFEFCC9BABBFD84DC80C0291ED4917CF1402FF03B8E12716E44C';
console.log("Result: " + CryptoJS.AES.decrypt({
ciphertext: CryptoJS.enc.Hex.parse(str.substring(32))
}, CryptoJS.enc.Utf8.parse(CryptoJS.SHA1("test").toString().substring(0,16)),
{
iv: CryptoJS.enc.Hex.parse(str.substring(0,32)),
}).toString(CryptoJS.enc.Utf8))
<script src="https://cdn.rawgit.com/CryptoStore/crypto-js/3.1.2/build/rollups/sha1.js"></script>
<script src="https://cdn.rawgit.com/CryptoStore/crypto-js/3.1.2/build/rollups/aes.js"></script>
以下是与固定Java代码兼容的CryptoJS代码:
var str = 'F6A5230232062D2F0BDC2080021E997C6D07A733004287544C9DDE7708975525';
console.log("Result: " + CryptoJS.AES.decrypt({
ciphertext: CryptoJS.enc.Hex.parse(str.substring(32))
}, CryptoJS.enc.Hex.parse(CryptoJS.SHA1("test").toString().substring(0,32)),
{
iv: CryptoJS.enc.Hex.parse(str.substring(0,32)),
}).toString(CryptoJS.enc.Utf8))
<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/sha1.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/aes.js"></script>
CryptoJS中的等效加密代码如下所示:
function encrypt(plaintext, password){
var iv = CryptoJS.lib.WordArray.random(128/8);
var key = CryptoJS.enc.Hex.parse(CryptoJS.SHA1(password).toString().substring(0,32));
var ct = CryptoJS.AES.encrypt(plaintext, key, { iv: iv });
return iv.concat(ct.ciphertext).toString();
}
console.log("ct: " + encrypt("plaintext", "test"));
<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/sha1.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/aes.js"></script>
答案 1 :(得分:0)
这个完美地适合我
import * as CryptoJS from 'crypto-js';
const SECRET_CREDIT_CARD_KEY = '1231231231231231' // 16 digits key
decrypt(cipherText) {
const iv = CryptoJS.enc.Hex.parse(this.SECRET_CREDIT_CARD_KEY);
const key = CryptoJS.enc.Utf8.parse(this.SECRET_CREDIT_CARD_KEY);
const result = CryptoJS.AES.decrypt(cipherText, key,
{
iv,
mode: CryptoJS.mode.ECB,
}
)
const final = result.toString(CryptoJS.enc.Utf8)
return final
}
console.log(decrypt('your encrypted text'))
在Angular 8中使用此库 https://www.npmjs.com/package/crypto-js