混合密码学。要解密的数据长度无效
Hybrid cryptography. Length of the data to decrypt is invalid
我在混合加密实施过程中遇到上述错误。
根据https://en.wikipedia.org/wiki/Hybrid_cryptosystem
我卡在了最后一步
我的密码是
private void button1_Click(object sender, EventArgs e)
{
try
{
CspParameters cspParams = new CspParameters { ProviderType = 1 };
RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider(2048, cspParams);
string publicKey =lblPublicKey.Text = Convert.ToBase64String(rsaProvider.ExportCspBlob(false));
string privateKey = lblPrivateKey.Text= Convert.ToBase64String(rsaProvider.ExportCspBlob(true));
string symmericKey = txtBoxSymmetricKey.Text = "Kamran12";
txtEncryptedData.Text = EncryptData(txtInputData.Text, symmericKey);
txtBoxEncryptedSymmetricKey.Text = RSA_Encrypt(symmericKey, publicKey);
txtBoxDescryptedSymmetricKey.Text = RSA_Decrypt(txtBoxEncryptedSymmetricKey.Text, privateKey);
txtDecryptedData.Text = DecryptData(txtEncryptedData.Text, txtBoxDescryptedSymmetricKey.Text); //getting error length of the data to decrypt is invalid
}
catch (Exception exc)
{
}
}
public static string RSA_Decrypt(string encryptedText, string privateKey)
{
CspParameters cspParams = new CspParameters { ProviderType = 1 };
RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider(cspParams);
rsaProvider.ImportCspBlob(Convert.FromBase64String(privateKey));
var buffer = Convert.FromBase64String(encryptedText);
byte[] plainBytes = rsaProvider.Decrypt(buffer, false);
string plainText = Encoding.UTF8.GetString(plainBytes, 0, plainBytes.Length);
return plainText;
}
public static string RSA_Encrypt(string data, string publicKey)
{
CspParameters cspParams = new CspParameters { ProviderType = 1 };
RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider(cspParams);
rsaProvider.ImportCspBlob(Convert.FromBase64String(publicKey));
byte[] plainBytes = Encoding.UTF8.GetBytes(data);
byte[] encryptedBytes = rsaProvider.Encrypt(plainBytes, false);
return Convert.ToBase64String(encryptedBytes);
}
public string EncryptData(string data, string key)
{
string encryptedData = null;
byte[] buffer = Encoding.UTF8.GetBytes(data);
DESCryptoServiceProvider desCryptSrvckey = new DESCryptoServiceProvider
{
Key = new UTF8Encoding().GetBytes(key)
};
desCryptSrvckey.IV = desCryptSrvckey.Key;
using (MemoryStream stmCipherText = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(stmCipherText, desCryptSrvckey.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(buffer, 0, buffer.Length);
cs.FlushFinalBlock();
encryptedData = Encoding.UTF8.GetString(stmCipherText.ToArray());
}
}
return encryptedData;
}
public string DecryptData(string data, string key)
{
byte[] encryptedMessageBytes = Encoding.UTF8.GetBytes(data);
string decryptedData = null;
DESCryptoServiceProvider desCryptSrvckey = new DESCryptoServiceProvider
{
Key = new UTF8Encoding().GetBytes(key)
};
desCryptSrvckey.IV = desCryptSrvckey.Key;
using (MemoryStream encryptedStream = new MemoryStream(encryptedMessageBytes))
{
using (
CryptoStream cs = new CryptoStream(encryptedStream, desCryptSrvckey.CreateDecryptor(),
CryptoStreamMode.Read))
{
using (StreamReader sr = new StreamReader(cs))
{
decryptedData = sr.ReadToEnd();
}
}
}
return decryptedData;
}
您将 encryptedData
声明为字符串。这是不正确的。您的加密数据是字节,而不是字符串。尝试将原始字节转换为 UTF-8 文本,如 encryptedData = Encoding.UTF8.GetString(stmCipherText.ToArray());
中那样不会产生 UTF-8 文本,但会产生垃圾并可能丢失数据。
如果您希望加密的输出为文本,则获取密文字节并使用 Convert.ToBase64String()
将它们转换为文本字符串。
解密时,将Base64字符串转回字节,再解密
我在混合加密实施过程中遇到上述错误。
根据https://en.wikipedia.org/wiki/Hybrid_cryptosystem
我卡在了最后一步
我的密码是
private void button1_Click(object sender, EventArgs e)
{
try
{
CspParameters cspParams = new CspParameters { ProviderType = 1 };
RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider(2048, cspParams);
string publicKey =lblPublicKey.Text = Convert.ToBase64String(rsaProvider.ExportCspBlob(false));
string privateKey = lblPrivateKey.Text= Convert.ToBase64String(rsaProvider.ExportCspBlob(true));
string symmericKey = txtBoxSymmetricKey.Text = "Kamran12";
txtEncryptedData.Text = EncryptData(txtInputData.Text, symmericKey);
txtBoxEncryptedSymmetricKey.Text = RSA_Encrypt(symmericKey, publicKey);
txtBoxDescryptedSymmetricKey.Text = RSA_Decrypt(txtBoxEncryptedSymmetricKey.Text, privateKey);
txtDecryptedData.Text = DecryptData(txtEncryptedData.Text, txtBoxDescryptedSymmetricKey.Text); //getting error length of the data to decrypt is invalid
}
catch (Exception exc)
{
}
}
public static string RSA_Decrypt(string encryptedText, string privateKey)
{
CspParameters cspParams = new CspParameters { ProviderType = 1 };
RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider(cspParams);
rsaProvider.ImportCspBlob(Convert.FromBase64String(privateKey));
var buffer = Convert.FromBase64String(encryptedText);
byte[] plainBytes = rsaProvider.Decrypt(buffer, false);
string plainText = Encoding.UTF8.GetString(plainBytes, 0, plainBytes.Length);
return plainText;
}
public static string RSA_Encrypt(string data, string publicKey)
{
CspParameters cspParams = new CspParameters { ProviderType = 1 };
RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider(cspParams);
rsaProvider.ImportCspBlob(Convert.FromBase64String(publicKey));
byte[] plainBytes = Encoding.UTF8.GetBytes(data);
byte[] encryptedBytes = rsaProvider.Encrypt(plainBytes, false);
return Convert.ToBase64String(encryptedBytes);
}
public string EncryptData(string data, string key)
{
string encryptedData = null;
byte[] buffer = Encoding.UTF8.GetBytes(data);
DESCryptoServiceProvider desCryptSrvckey = new DESCryptoServiceProvider
{
Key = new UTF8Encoding().GetBytes(key)
};
desCryptSrvckey.IV = desCryptSrvckey.Key;
using (MemoryStream stmCipherText = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(stmCipherText, desCryptSrvckey.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(buffer, 0, buffer.Length);
cs.FlushFinalBlock();
encryptedData = Encoding.UTF8.GetString(stmCipherText.ToArray());
}
}
return encryptedData;
}
public string DecryptData(string data, string key)
{
byte[] encryptedMessageBytes = Encoding.UTF8.GetBytes(data);
string decryptedData = null;
DESCryptoServiceProvider desCryptSrvckey = new DESCryptoServiceProvider
{
Key = new UTF8Encoding().GetBytes(key)
};
desCryptSrvckey.IV = desCryptSrvckey.Key;
using (MemoryStream encryptedStream = new MemoryStream(encryptedMessageBytes))
{
using (
CryptoStream cs = new CryptoStream(encryptedStream, desCryptSrvckey.CreateDecryptor(),
CryptoStreamMode.Read))
{
using (StreamReader sr = new StreamReader(cs))
{
decryptedData = sr.ReadToEnd();
}
}
}
return decryptedData;
}
您将 encryptedData
声明为字符串。这是不正确的。您的加密数据是字节,而不是字符串。尝试将原始字节转换为 UTF-8 文本,如 encryptedData = Encoding.UTF8.GetString(stmCipherText.ToArray());
中那样不会产生 UTF-8 文本,但会产生垃圾并可能丢失数据。
如果您希望加密的输出为文本,则获取密文字节并使用 Convert.ToBase64String()
将它们转换为文本字符串。
解密时,将Base64字符串转回字节,再解密