问 Android Java代码Swift实现RSA加密/解密

EN

我有一些来自Java的方法，需要在Swift中实现：

    fun encryptMessage(content: String): String {
        val cipher = Cipher.getInstance("RSA/ECB/PKCS1PADDING")
        cipher.init(Cipher.ENCRYPT_MODE, publicKey)
        val encryptedBytes = cipher.doFinal(content.toByteArray())
        val encryptedData = Base64.encodeToString(encryptedBytes, Base64.DEFAULT)
        return ENCRYPT_MARK + encryptedData
    fun decryptMessage(content: String): String {
        val cipher = Cipher.getInstance("RSA/ECB/PKCS1PADDING")
        cipher.init(Cipher.DECRYPT_MODE, privateKey)
        var encryptedData = Base64.decode(content.substring(ENCRYPT_MARK.length), Base64.DEFAULT)
        val decryptedBytes = cipher.doFinal(encryptedData)
        return String(decryptedBytes)
    }

我对加密和解密不是很在行。我尝试了我找到的几个库和代码，但没有对我有效。

我需要解密的示例字符串：

"p+KuB7UVUteY8g3HVMxo+7h2xhZQxhPjPayMolqq8EYyIknbQjgqHjC95NR8/le6G0F8SQACrOdj\nTlPU1+o7bZrE8ukI7B35i9sWZns3Y2scA9U7yz8z5KsTZ240+4+Xd7dZwfQ49Z6J7nNOfBR/97pq\n2l1QKe0/SThUEraZyts=\n"

我的私钥：

"-----BEGIN RSA PRIVATE KEY-----\nMIICXQIBAAKBgQDjOUZOZgIYWDMkyhyNb/gsFUDbDB3a+FWwT0d2HE7cd3bqebYLg\nKAMqwpc8nCHR77kO23Nd/U5WKVWwFcHUQVtkMcX4QNDtxSV72LRNaSaQZkwBofw9O\nu338mm1hR0DEYzYPXKuyaP3l5/pvZyvOHrA+i0ZD7pUohEtiDsuNhZbwIDAQABAoG\nBAJoM6q2cWy9GHOaEYHdDwm2guyfHPzaFxxKRrVFWP+EY3XZ6rgF+YwQzsgLyG3ic\nG7+AyyDSg18tymrWXCqJs7Mdrxq3xZmdCzwTcfgxZcwiFG0caK/jbA8rXO60xecag\nZRR+AyWa+2wnwt5xPtFcqk7GhqkWIolzQddW7L3CIuBAkEA9Xw+fnLrbR3WaxTpa3\n88NEEgvyxIS2eGc+lRUbC8w2xX5qDtV8Ak7rxkmXGURJ6tvwyUi/Q+5y+X20mBtt8\nsKwJBAOz0yph9n4iHtC+BL5U+LfpZuUO6uUctbmfXs+fU2glI8rAwXhanBCs0Ph/0\nG7aXmNKHvcSjQ9N5mhTPBvhpcc0CQH4PPTBF5ytzZQY8CNmQzuOuhhhlrwI5uUuQh\npfCgEyCOGlQPlEPdGe8CpTZRGAwc9xlo2pzFFI3mG2dQ6Ua2V0CQQCSMY11e7wbzi\n37SScEWzKezRCimueI5JzDcK/MjuRe6iThU1YZf73wsfDKYh9fDjT5X0pTsa89ID9\nSK1DPnq7ZAkB6ybvpomovyBBgSjjTEwwSHyAIr5HIE2hkDjer6/87/WNKEw1yg11b\ngSoJC67f1xnLj7bv9/EJRPWTokCaRRm/\n-----END RSA PRIVATE KEY-----"

1. SecKeyCreateDecryptedData

let encryptedMessageData = encryptedMessage.data(using: .utf8)
if let decryptedMessage:Data = SecKeyCreateDecryptedData(privateSecKey!, .rsaEncryptionPKCS1, encryptedMessageData as CFData, error) as Data? {
    print("We have an decrypted message \(String.init(data: decryptedMessage, encoding: .utf8)!)")
} else {
    print("Error decrypting")
}

• 不工作。我得到打印“错误解密”，但变量

中没有错误。

2. SwiftyRSA

    let encrypted = try EncryptedMessage(data: key.data(using: .utf8)!) // try EncryptedMessage(base64Encoded: key)
    let privateKey = try PrivateKey(pemEncoded: keyPair.privateKey)
    let decryptedKey = try encrypted.decrypted(with: privateKey, padding: SecPadding.PKCS1)

• 获取chunkDecryptFailed(索引: 0)错误.

3. CryptorRSA

    let data = base64.data(using: .utf8)!
    let encryptedData = try CryptorRSA.createEncrypted(with: data)
    let decryptedData = try encryptedData.decrypted(with: privateKey, algorithm: .sha1)

• 获取错误：

错误Domain=NSOSStatusErrorDomain代码=-50 "RSAdecrypt错误输入(err -27)“UserInfo={numberOfErrorsDeep=0，NSDescription=RSAdecrypt错误输入(err -27)}

我甚至尝试用这些代码行来实现解密，但没有成功：

static func decrypt(string: String, privateKey: String?) -> String? {
    guard let privateKey = privateKey else { return nil }
    let keyString = privateKey.replacingOccurrences(of: "-----BEGIN RSA PRIVATE KEY-----\n", with: "").replacingOccurrences(of: "\n-----END RSA PRIVATE KEY-----", with: "")
    guard let data = Data(base64Encoded: keyString, options: .ignoreUnknownCharacters) else { return nil }
    var attributes: CFDictionary {
        return [kSecAttrKeyType         : kSecAttrKeyTypeRSA,
                kSecAttrKeyClass        : kSecAttrKeyClassPrivate,
                kSecAttrKeySizeInBits   : 2048,
                kSecReturnPersistentRef : true] as CFDictionary
    var error: Unmanaged<CFError>? = nil
    guard let secKey = SecKeyCreateWithData(data as CFData, attributes, &error) else {
        print(error.debugDescription)
        return nil
    return decrypt(string: string, privateKey: secKey)
static func decrypt(string: String, privateKey: SecKey) -> String?  {
    let buffer = [UInt8](string.utf8)
    let keySize = SecKeyGetBlockSize(privateKey)
    var messageDecrypted = [UInt8](repeating: 0, count: keySize)
    var messageDecryptedSize = keySize
    var status = SecKeyDecrypt(privateKey, SecPadding.PKCS1, buffer, buffer.count, &messageDecrypted, &messageDecryptedSize)
    if status != noErr {
        print("Decryption Error!")
        return nil
    let result = String(bytes: messageDecrypted, encoding: .utf8)
    print(result)
    return result
}

我做错了什么？我如何解密这些示例数据？谢谢你的帮助