public static void DecryptSavedAnswerUnusualExponent()
{
byte[] cipherBytes =
{
0x55, 0x64, 0x05, 0xF7, 0xBF, 0x99, 0xD8, 0x07,
0xD0, 0xAC, 0x1B, 0x1B, 0x60, 0x92, 0x57, 0x95,
0x5D, 0xA4, 0x5B, 0x55, 0x0E, 0x12, 0x90, 0x24,
0x86, 0x35, 0xEE, 0x6D, 0xB3, 0x46, 0x3A, 0xB0,
0x3D, 0x67, 0xCF, 0xB3, 0xFA, 0x61, 0xBB, 0x90,
0x6D, 0x6D, 0xF8, 0x90, 0x5D, 0x67, 0xD1, 0x8F,
0x99, 0x6C, 0x31, 0xA2, 0x2C, 0x8E, 0x99, 0x7E,
0x75, 0xC5, 0x26, 0x71, 0xD1, 0xB0, 0xA5, 0x41,
0x67, 0x19, 0xF7, 0x40, 0x04, 0xBE, 0xB2, 0xC0,
0x97, 0xFB, 0xF6, 0xD4, 0xEF, 0x48, 0x5B, 0x93,
0x81, 0xF8, 0xE1, 0x6A, 0x0E, 0xA0, 0x74, 0x6B,
0x99, 0xC6, 0x23, 0xF5, 0x02, 0xDE, 0x47, 0x49,
0x1E, 0x9D, 0xAE, 0x55, 0x20, 0xB5, 0xDE, 0xA0,
0x04, 0x32, 0x37, 0x4B, 0x24, 0xE4, 0x64, 0x1B,
0x1B, 0x4B, 0xC0, 0xC7, 0x30, 0x08, 0xA6, 0xAE,
0x50, 0x86, 0x08, 0x34, 0x70, 0xE5, 0xB0, 0x3B,
};
byte[] output;
using (var rsa = new RSACryptoServiceProvider())
{
rsa.ImportParameters(TestData.UnusualExponentParameters);
output = rsa.Decrypt(cipherBytes, true);
}
Assert.Equal(TestData.HelloBytes, output);
}
public static void DecryptSavedAnswer()
{
byte[] cipherBytes =
{
0x35, 0x6F, 0x8F, 0x2C, 0x4D, 0x1A, 0xAC, 0x6D,
0xE7, 0x52, 0xA5, 0xDF, 0x26, 0x54, 0xA6, 0x34,
0xF5, 0xBB, 0x14, 0x26, 0x1C, 0xE4, 0xDC, 0xA2,
0xD8, 0x4D, 0x8F, 0x1C, 0x55, 0xD4, 0xC7, 0xA7,
0xF2, 0x3C, 0x99, 0x77, 0x9F, 0xE4, 0xB7, 0x34,
0xA6, 0x28, 0xB2, 0xC4, 0xFB, 0x6F, 0x85, 0xCA,
0x19, 0x21, 0xCA, 0xC1, 0xA7, 0x8D, 0xAE, 0x95,
0xAB, 0x9B, 0xA9, 0x88, 0x5B, 0x44, 0xC6, 0x9B,
0x44, 0x26, 0x71, 0x5D, 0x02, 0x3F, 0x43, 0x42,
0xEF, 0x4E, 0xEE, 0x09, 0x87, 0xEF, 0xCD, 0xCF,
0xF9, 0x88, 0x99, 0xE8, 0x49, 0xF7, 0x8F, 0x9B,
0x59, 0x68, 0x20, 0xF3, 0xA7, 0xB2, 0x94, 0xA4,
0x23, 0x70, 0x83, 0xD9, 0xAC, 0xE7, 0x5E, 0xEE,
0xE9, 0x7B, 0xE4, 0x4F, 0x73, 0x2E, 0x9B, 0xD8,
0x2A, 0x75, 0xFB, 0x6C, 0xB9, 0x39, 0x6D, 0x72,
0x8A, 0x9C, 0xCD, 0x58, 0x1A, 0x27, 0x79, 0x97,
};
byte[] output;
using (var rsa = new RSACryptoServiceProvider())
{
rsa.ImportParameters(TestData.RSA1024Params);
output = rsa.Decrypt(cipherBytes, true);
}
Assert.Equal(TestData.HelloBytes, output);
}
private static byte[] Decrypt(string privateKeyXml, byte[] encryptedBytes, RsaKeyLengths rsaKeyLength)
{
using (var RSA = new RSACryptoServiceProvider((int) rsaKeyLength))
{
RSA.FromXmlString(privateKeyXml);
byte[] bytes = RSA.Decrypt(encryptedBytes, DoOAEPPadding);
return bytes;
}
}
/// <summary>
/// A string extension method that decrypt a string.
/// </summary>
/// <param name="this">The @this to act on.</param>
/// <param name="key">The key.</param>
/// <returns>The decrypted string.</returns>
/// <example>
/// <code>
/// using Microsoft.VisualStudio.TestTools.UnitTesting;
/// using Z.ExtensionMethods;
///
/// namespace ExtensionMethods.Examples
/// {
/// [TestClass]
/// public class System_String_DecryptRSA
/// {
/// [TestMethod]
/// public void DecryptRSA()
/// {
/// // Type
/// string @this = "7E-24-A5-CF-8E-7A-83-52-90-CA-81-6F-26-04-7C-E6-F4-25-47-26-A9-55-04-83-32-78-1A-C0-E4-5D-90-66-A6-E1-58-59-A8-48-E1-20-21-B9-FE-84-31-53-52-9B-45-E1-B2-93-71-92-DA-29-5B-99-D1-41-19-9C-3E-13-4B-2B-BC-08-94-31-A4-F9-B9-0A-04-2F-C6-78-B1-47-27-11-2C-E6-AF-BF-A8-F2-F3-F6-4E-CB-EB-79-5E-80-C6-A1-0A-D7-7C-F1-16-0E-41-14-4E-76-7E-9E-DD-61-BF-11-5E-62-79-2D-C4-11-D2-F6-3D-7F-DD-87-C4-4E";
///
/// // Examples
/// string value = @this.DecryptRSA("Buzz"); // return "Fizz";
///
/// // Unit Test
/// Assert.AreEqual("Fizz", value);
/// }
/// }
/// }
/// </code>
/// </example>
public static string DecryptRSA(this string @this, string key) {
var cspp = new CspParameters {KeyContainerName = key};
var rsa = new RSACryptoServiceProvider(cspp) {PersistKeyInCsp = true};
string[] decryptArray = @this.Split(new[] {"-"}, StringSplitOptions.None);
byte[] decryptByteArray = Array.ConvertAll(decryptArray, (s => Convert.ToByte(byte.Parse(s, NumberStyles.HexNumber))));
byte[] bytes = rsa.Decrypt(decryptByteArray, true);
return Encoding.UTF8.GetString(bytes);
}
public static void Main(String[] args) {
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
RijndaelManaged aes = new RijndaelManaged();
aes.KeySize = 128; // 192;
aes.Key = new byte[] {0xC7, 0x42, 0xD1, 0x37, 0x4B, 0xAC, 0xFE, 0x94,
0x9D, 0x59, 0x79, 0x92, 0x71, 0x48, 0xD6, 0x8E};
// ,1,2,3,4,5,6,7,8};
byte[] aesKey = aes.Key;
if (args.Length > 0) {
FileStream fs = new FileStream(args[0], FileMode.Open);
StreamReader sr = new StreamReader(fs);
String xmlString = sr.ReadToEnd();
rsa.FromXmlString(xmlString);
} else {
FileStream fs = new FileStream("rsa.xml", FileMode.Create);
StreamWriter sw = new StreamWriter(fs);
sw.Write(rsa.ToXmlString(true));
sw.Close();
}
Console.WriteLine("RSA Key is:\n"+rsa.ToXmlString(true));
Console.WriteLine("AES Key is:");
PrintByteArray(aesKey);
byte[] encryptedKey1 = rsa.Encrypt(aesKey, true);
Console.WriteLine("Encrypted AES Key is:");
PrintByteArray(encryptedKey1);
byte[] decryptedKey1 = rsa.Decrypt(encryptedKey1, true);
Console.WriteLine("Decrypted AES Key is:");
PrintByteArray(decryptedKey1);
byte[] encryptedKey2 = rsa.Encrypt(aesKey, false);
Console.WriteLine("Encrypted2 AES Key is:");
PrintByteArray(encryptedKey2);
byte[] decryptedKey2 = rsa.Decrypt(encryptedKey2, false);
Console.WriteLine("Decrypted AES Key is:");
PrintByteArray(decryptedKey2);
}
/// <summary>
/// 字符串解密
/// </summary>
/// <param name="encryptString">密文</param>
/// <param name="privateKey">私钥</param>
/// <returns>遇到解密失败将会返回原字符串</returns>
public static string DecryptString(string encryptString, string privateKey)
{
string source = string.Empty;
try
{
RSACryptoServiceProvider.UseMachineKeyStore = true;
RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider();
rsaProvider.FromXmlString(FromBase64Key(privateKey));
byte[] data = rsaProvider.Decrypt(HexStringToBytes(encryptString), false);
source = System.Text.Encoding.ASCII.GetString(data);
}
catch { }
return source;
}
public static string RSADecrypt(string encryptedString)
{
CspParameters param = new CspParameters();
param.KeyContainerName = "PowerGridIndia";
using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(param))
{
int len = encryptedString.Length;
encryptedString = encryptedString.Replace(" ", "+");
byte[] encryptdata = Convert.FromBase64String(encryptedString);
byte[] decryptdata = rsa.Decrypt(encryptdata, false);
string plaindata = System.Text.Encoding.Default.GetString(decryptdata);
return plaindata;
}
}
public static void RsaCryptRoundtrip()
{
byte[] crypt;
byte[] output;
using (var rsa = new RSACryptoServiceProvider())
{
crypt = rsa.Encrypt(TestData.HelloBytes, true);
output = rsa.Decrypt(crypt, true);
}
Assert.NotEqual(crypt, output);
Assert.Equal(TestData.HelloBytes, output);
}
public static void RsaDecryptAfterExport()
{
byte[] output;
using (var rsa = new RSACryptoServiceProvider())
{
byte[] crypt = rsa.Encrypt(TestData.HelloBytes, true);
// Export the key, this should not clear/destroy the key.
RSAParameters ignored = rsa.ExportParameters(true);
output = rsa.Decrypt(crypt, true);
}
Assert.Equal(TestData.HelloBytes, output);
}
private static string Decrypt(byte[] encData)
{
var prvParams = "";
using (var reader = new StreamReader(new FileStream("1.pub", FileMode.Open)))
{
prvParams = reader.ReadToEnd();
}
using (var rsa = new RSACryptoServiceProvider())
{
rsa.FromXmlString(prvParams);
return ByteConverter.GetString(rsa.Decrypt(encData, false));
}
}
public static byte[] RSADecrypt(byte[] DataToDecrypt, RSAParameters RSAKeyInfo)
{
try
{
byte[] decryptedData;
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())
{
RSA.ImportParameters(RSAKeyInfo);
decryptedData = RSA.Decrypt(DataToDecrypt,false);
}
return decryptedData;
}
catch (CryptographicException e)
{
Console.WriteLine(e.ToString());
return null;
}
}
public bool CheckLicense(byte[] license)
{
try {
var rsaPrivate = new RSACryptoServiceProvider();
rsaPrivate.FromXmlString(PRI_XML);
byte[] decryptedRSA = rsaPrivate.Decrypt(license, false);
string originalResult = Encoding.Default.GetString(decryptedRSA);
string[] result = originalResult.Split('|');
if (result.Length == 4)
{
if (result[3] != ENC_MSG)
{
return(false);
}
this.LicenseTaker = result[0];
this.PurchaseInfo = result[1];
this.LicenseCount = result[2];
return(true);
}
} catch {
this.PurchaseInfo = "License not valid!";
}
return(false);
}
protected override bool HandshakeActive(SendCall Send, ReceiveCall Receive)
{
if (!Send(Encoding.ASCII.GetBytes(KEXCrypto.ToXmlString(false))))
{
return(false);
}
if (!Receive(out byte[] data, out EndPoint source))
{
return(false);
}
DataCrypto.Key = KEXCrypto.Decrypt(data, RSAEncryptionPadding.Pkcs1);
if (!Send(DataCrypto.IV))
{
return(false);
}
if (!Receive(out data, out source))
{
return(false);
}
return(DecryptSecret(data));
}
public void DecyrptFile(string FilePath, int keysize)
{
byte[] decryped;
string beriKljuc = null;
SaveFileDialog dialog = new SaveFileDialog();
if (dialog.ShowDialog() == DialogResult.OK)
{
beriKljuc = File.ReadAllText(dialog.FileName);
}
using (var rsadecyrpt = new RSACryptoServiceProvider(keysize))
{
rsa.FromXmlString(beriKljuc);
byte[] beri = File.ReadAllBytes(FilePath);
decryped = rsa.Decrypt(beri, false);
}
File.WriteAllBytes(FilePath, decryped);
}
private void ExtractButtonClick(object sender, EventArgs e)
{
try
{
var dataToEncrypt = File.ReadAllBytes(@"D:\TEST\test.txt");
byte[] encryptedData;
using (var rsa1 = new RSACryptoServiceProvider(1024))
{
var justPublicKey1 = this.GetStringFromFile(@"D:\TEST\GpiPublicKey.bin");
rsa1.FromXmlString(justPublicKey1);
encryptedData = rsa1.Encrypt(dataToEncrypt, false);
}
using (var rsa2 = new RSACryptoServiceProvider(1024))
{
var publicAndPrivateKeys2 = this.GetStringFromFile(@"D:\TEST\GpiKeyPair.bin");
rsa2.FromXmlString(publicAndPrivateKeys2);
var decryptedData = rsa2.Decrypt(encryptedData, false);
var byteConverter = new ASCIIEncoding();
this.InfoListBox.Items.Add($"Decrypted plaintext: {byteConverter.GetString(decryptedData)}");
var signedBytes = File.ReadAllBytes(@"D:\TEST\Test.sig");
var result = rsa2.VerifyData(decryptedData, CryptoConfig.MapNameToOID("SHA512"), signedBytes);
this.InfoListBox.Items.Add(rsa2.CspKeyContainerInfo.UniqueKeyContainerName);
this.InfoListBox.Items.Add(BitConverter.ToString(decryptedData).Replace("-", string.Empty));
this.InfoListBox.Items.Add(BitConverter.ToString(signedBytes).Replace("-", string.Empty));
this.InfoListBox.Items.Add(result);
}
}
catch (Exception ex)
{
this.InfoListBox.Items.Add(ex.Message);
}
}
public bool Decrypt(byte[] ToDecrypt, out byte[] decrypted)
{
bool flag;
decrypted = null;
if (string.IsNullOrEmpty(m_privateKey))
{
return(false);
}
try
{
using (RSACryptoServiceProvider provider = new RSACryptoServiceProvider())
{
provider.FromXmlString(m_privateKey);
decrypted = provider.Decrypt(ToDecrypt, false);
flag = true;
}
}
catch
{
flag = false;
}
return(flag);
}
public static void EncryptASymmetricKeyWithRSA()
{
var rsa = new RSACryptoServiceProvider(2048);
byte[] blob = rsa.ExportCspBlob(false);
var publicKey = new RSACryptoServiceProvider();
publicKey.ImportCspBlob(blob);
var aes = new AesCryptoServiceProvider();
aes.KeySize = 256;
// Now I will encrypt the key for a certain recipient using their public key.
// This encryptedKey I can send at the other party that I want to communicate with securely.
byte[] encryptedKey = publicKey.Encrypt(aes.Key, true);
// The other party now will use their private key to decrypt the encryptedKey.
// So now the decryptedKey here should be equal to aes.Key which was encrypted earlier.
byte[] decryptedKey = rsa.Decrypt(encryptedKey, true);
//Enumerable.SequenceEqual(decryptedKey, aes.Key).Should().BeTrue();
}
/// <summary>
/// SHA1加密字符串 （不可解密）
/// </summary>
/// <param name="source">源字符串</param>
/// <returns>加密后的字符串</returns>
//public string SHA1(string source)
//{
// return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "SHA1");
//}
/// <summary>
/// MD5加密字符串 （不可解密）
/// </summary>
/// <param name="source">源字符串</param>
/// <returns>加密后的字符串</returns>
//public string MD5(string source)
//{
// return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "MD5"); ;
//}
#endregion
#region RSA
#region rsa解密
/// <summary>
/// rsa解密
/// </summary>
/// <param name="s">加密后字符串字符串</param>
/// <param name="key">加密key</param>
/// <returns></returns>
public static string RSADecrypt(string s, string key = strKeys)
{
string result = null;
if (string.IsNullOrEmpty(s))
{
throw new ArgumentException("An empty string value cannot be encrypted.");
}
if (string.IsNullOrEmpty(key))
{
throw new ArgumentException("Cannot decrypt using an empty key. Please supply a decryption key.");
}
CspParameters cspp = new CspParameters();
cspp.KeyContainerName = key;
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cspp);
rsa.PersistKeyInCsp = true;
string[] decryptArray = s.Split(new string[] { "-" }, StringSplitOptions.None);
byte[] decryptByteArray = Array.ConvertAll <string, byte>(decryptArray, (a => Convert.ToByte(byte.Parse(a, System.Globalization.NumberStyles.HexNumber))));
byte[] bytes = rsa.Decrypt(decryptByteArray, true);
result = System.Text.UTF8Encoding.UTF8.GetString(bytes);
return(result);
}
public static string Encrypt(string toEncrypt)
{
RSACryptoServiceProvider CSPRSA = null;
string result;
try
{
CSPRSA = new RSACryptoServiceProvider();
CSPRSA.FromXmlString(SAFSecurityKeys.loadKeysFromFile());
byte[] toEncryptArray = Encoding.UTF8.GetBytes(toEncrypt);
result = Convert.ToBase64String(CSPRSA.Decrypt(toEncryptArray, false));
}
catch
{
result = null;
}
finally
{
if (CSPRSA != null)
{
CSPRSA.Clear();
}
}
return result;
}
public static void ASymmetricKeyEncryptionDecryption(byte[] data)
{
using (var rsa = new RSACryptoServiceProvider())
{
byte[] encrypted = rsa.Encrypt(data, true);
foreach (byte b in encrypted)
{
Console.Write(b + " ");
}
byte[] decrypted = rsa.Decrypt(encrypted, true);
Console.WriteLine("\n........................");
foreach (byte b in decrypted)
{
Console.Write(b + " ");
}
File.WriteAllText("PublicKeyOnly.xml", rsa.ToXmlString(false));
File.WriteAllText("PublicPrivate.xml", rsa.ToXmlString(true));
rsa.ToString();
}
}
public string Decryption(string strText)
{
var base64Encrypted = strText;
using (var rsa = new RSACryptoServiceProvider(512))
{
try
{
var P = new RSAParameters()
{
D = b64_dBytes,
DP = b64_dpBytes,
DQ = b64_dqBytes,
Exponent = b64_exponent,
InverseQ = b64_inverseqBytes,
Modulus = b64_modulusBytes,
P = b64_pBytes,
Q = b64_qBytes
};
rsa.ImportParameters(P);
var resultBytes = Convert.FromBase64String(base64Encrypted);
var decryptedBytes = rsa.Decrypt(resultBytes, false);
var decryptedData = Encoding.UTF8.GetString(decryptedBytes);
return(decryptedData.ToString());
}
catch (Exception)
{
}
finally
{
rsa.PersistKeyInCsp = false;
}
}
return(null);
}
/// <summary>
/// Decrypts the passed in string value using RSA
/// </summary>
/// <param name="decryptValue"><see cref="System.String"/> value to decrypt</param>
/// <param name="publicKey"><see cref="System.String"/> registry key name that contains the public key</param>
/// <returns></returns>
public static string DecryptStringUsingRegistryKey(this string decryptValue, string privateKey)
{
// This is the variable that will be returned to the user
string decryptedValue = string.Empty;
// Make sure user supplied a value for the registry key
if (string.IsNullOrEmpty(privateKey))
{
throw new ArgumentNullException("You must provide the name of the registry key for the public key");
}
// Create the CspParameters object which is used to create the RSA provider
// without it generating a new private/public key.
// Parameter value of 1 indicates RSA provider type - 13 would indicate DSA provider
CspParameters csp = new CspParameters(1);
// Registry key name containing the RSA private/public key
csp.KeyContainerName = privateKey;
// Supply the provider name
csp.ProviderName = "Microsoft Strong Cryptographic Provider";
//Create new RSA object passing our key info
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(csp);
// Before decryption we must convert this ugly string into a byte array
byte[] valueToDecrypt = Convert.FromBase64String(decryptValue);
// Decrypt the passed in string value - Again the false value has to do with padding
byte[] plainTextValue = rsa.Decrypt(valueToDecrypt, false);
// Extract our decrypted byte array into a string value to return to our user
decryptedValue = System.Text.Encoding.UTF8.GetString(plainTextValue);
return(decryptedValue);
}
private byte[] DecryptData(byte[] encryptedData, RSAParameters rsaKeyInfo, bool doOAEPPadding)
{
byte[] text = null;
try
{
using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())
{
//Import the RSA Key information. This needs to include the private key information.
rsa.ImportParameters(rsaKeyInfo);
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or later.
text = rsa.Decrypt(encryptedData, doOAEPPadding);
}
}
catch (CryptographicException)
{
throw;
}
catch (Exception)
{
throw;
}
return(text);
}
private void decryptFile(string keyPath, string filePath, string outputPath)
{
rsa.FromXmlString(File.ReadAllText(keyPath));
FileStream fsInput = new FileStream(filePath, FileMode.Open, FileAccess.Read);
FileStream fsOutput = new FileStream(outputPath, FileMode.Create, FileAccess.Write);
fsOutput.SetLength(0);
byte[] bin, encryptedData;
long rdlen = 0;
long totlen = fsInput.Length;
int len;
int maxByte = rsa.KeySize / 8;
progressBarControl1.Properties.Step = 1;
progressBarControl1.Properties.PercentView = true;
progressBarControl1.Properties.Maximum = (int)(totlen + maxByte - 1) / maxByte;
progressBarControl1.Properties.Minimum = 0;
while (rdlen < totlen)
{
bin = new byte[maxByte];
len = fsInput.Read(bin, 0, maxByte);
encryptedData = rsa.Decrypt(bin, false);
fsOutput.Write(encryptedData, 0, encryptedData.Length);
rdlen += len;
progressBarControl1.PerformStep();
progressBarControl1.Update();
}
fsOutput.Close();
fsInput.Close();
}
/// <summary>
/// 解密
/// </summary>
public static string Decrypt(string privateKey, string content)
{
if (string.IsNullOrEmpty(privateKey) || string.IsNullOrEmpty(content))
{
return(null);
}
byte[] bt = null;
try
{
RSACryptoServiceProvider rsa = RSA.CreateRsaProviderFromPrivateKey(privateKey);
bt = rsa.Decrypt(Convert.FromBase64String(content), false);
}
catch (Exception)
{
return(null);
}
if (bt != null && bt.Length > 0)
{
return(Encoding.UTF8.GetString(bt));
}
return(null);
}
/// <summary>
/// Gets the decrypted password using the RSA private key which can be found in the
/// PEM file for the key pair.
/// </summary>
/// <param name="rsaPrivateKey">The RSA private key from the PEM file</param>
/// <returns>The decrypted password</returns>
public string GetDecryptedPassword(string rsaPrivateKey)
{
RSAParameters rsaParams;
try
{
rsaParams = new PemReader(new StringReader(rsaPrivateKey.Trim())).ReadPrivatekey();
}
catch (Exception e)
{
throw new AmazonEC2Exception("Invalid RSA Private Key", e);
}
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.ImportParameters(rsaParams);
byte[] encryptedBytes = Convert.FromBase64String(this.PasswordData);
var decryptedBytes = rsa.Decrypt(encryptedBytes, false);
string decrypted = Encoding.UTF8.GetString(decryptedBytes);
return(decrypted);
}
public static void Encrypt()
{
string plainText = "This is my super secret data";
Console.WriteLine($"Plain text: {plainText}");
ASCIIEncoding converter = new ASCIIEncoding();
byte[] plaintBytes = converter.GetBytes(plainText);
DumbBytes("Plain bytes: ", plaintBytes);
byte[] encryptedBytes, decryptedBytes;
RSACryptoServiceProvider rsaEncrypt = new RSACryptoServiceProvider();
//get keys out of the encryptor
string publicKey = rsaEncrypt.ToXmlString(includePrivateParameters: false);
Console.WriteLine($"Public key: {publicKey}");
string privateKey = rsaEncrypt.ToXmlString(includePrivateParameters: true);
Console.WriteLine($"Private key: {privateKey}");
rsaEncrypt.FromXmlString(privateKey);
encryptedBytes = rsaEncrypt.Encrypt(plaintBytes, fOAEP: false);
DumbBytes("Encrypted bytes: ", encryptedBytes);
RSACryptoServiceProvider rsaDecrypt = new RSACryptoServiceProvider();
rsaDecrypt.FromXmlString(privateKey);
decryptedBytes = rsaDecrypt.Decrypt(encryptedBytes, fOAEP: false);
DumbBytes("Decrypted bytes: ", decryptedBytes);
Console.WriteLine($"Decrypted string: {converter.GetString(decryptedBytes)}");
}
public byte[] _DecryptByPriKey(byte[] inputBytes, RSACryptoServiceProvider key)
{
int bufferSize = key.KeySize / 8;
var buffer = new byte[bufferSize];
using (MemoryStream inputStream = new MemoryStream(inputBytes),
outputStream = new MemoryStream())
{
while (true)
{
int readSize = inputStream.Read(buffer, 0, bufferSize);
if (readSize <= 0)
{
break;
}
var temp = new byte[readSize];
Array.Copy(buffer, 0, temp, 0, readSize);
var rawBytes = key.Decrypt(temp, false);
outputStream.Write(rawBytes, 0, rawBytes.Length);
}
return(outputStream.ToArray());
}
}
public string Decrypt(string strText)
{
var testData = Encoding.UTF8.GetBytes(strText);
using (var rsa = new RSACryptoServiceProvider(1024))
{
try
{
var base64Encrypted = strText;
// server decrypting data with private key
rsa.FromXmlString(privateKey);
var resultBytes = Convert.FromBase64String(base64Encrypted);
var decryptedBytes = rsa.Decrypt(resultBytes, false);
var decryptedData = Encoding.UTF8.GetString(decryptedBytes);
return(decryptedData);
}
finally
{
rsa.PersistKeyInCsp = false;
}
}
}
public static string DecryptString(string inputString, int dwKeySize, string xmlString)
{
// TODO: Add Proper Exception Handlers
RSACryptoServiceProvider rsaCryptoServiceProvider = new RSACryptoServiceProvider(dwKeySize);
rsaCryptoServiceProvider.FromXmlString(xmlString);
int base64BlockSize = ((dwKeySize / 8) % 3 != 0) ? (((dwKeySize / 8) / 3) * 4) + 4 : ((dwKeySize / 8) / 3) * 4;
int iterations = inputString.Length / base64BlockSize;
List <byte> arrayList = new List <byte>();
for (int i = 0; i < iterations; i++)
{
byte[] encryptedBytes = Convert.FromBase64String(inputString.Substring(base64BlockSize * i, base64BlockSize));
// Be aware the RSACryptoServiceProvider reverses the order of
// encrypted bytes after encryption and before decryption.
// If you do not require compatibility with Microsoft Cryptographic
// API (CAPI) and/or other vendors.
// Comment out the next line and the corresponding one in the
// EncryptString function.
Array.Reverse(encryptedBytes);
arrayList.AddRange(rsaCryptoServiceProvider.Decrypt(encryptedBytes, true));
}
return(Encoding.UTF8.GetString(arrayList.ToArray()));
}
public static byte[] RSADecrypt(byte[] privateKey, byte[] dataToDecrypt)
{
// helper to RSA decrypt a given blob
// PROV_RSA_AES == 24
var cspParameters = new CspParameters(24);
using (var rsaProvider = new RSACryptoServiceProvider(cspParameters))
{
try
{
rsaProvider.PersistKeyInCsp = false;
rsaProvider.ImportCspBlob(privateKey);
var dataToDecryptRev = new byte[256];
Buffer.BlockCopy(dataToDecrypt, 0, dataToDecryptRev, 0, dataToDecrypt.Length); // ... Array.Copy? naw... :(
Array.Reverse(dataToDecryptRev); // ... don't ask me how long it took to realize this :(
var dec = rsaProvider.Decrypt(dataToDecryptRev, false); // no padding
return(dec);
}
catch (Exception e)
{
Console.WriteLine("Error decryption domain key: {0}", e.Message);
}
finally
{
rsaProvider.PersistKeyInCsp = false;
rsaProvider.Clear();
}
}
return(new byte[0]);
}
public byte[] ReadAllBytes(Stream stream)
{
// tested by?
Console.WriteLine("enter ReadAllBytes " + new { stream });
var m = new MemoryStream();
var data = new byte[EncryptedDataChunkSize];
var datalength = stream.Read(data, 0, data.Length);
while (datalength > 0)
{
var rgb = new byte[datalength];
Array.Copy(data, rgb, datalength);
var clear = rsa.Decrypt(rgb, fOAEP: fOAEP);
m.Write(clear, 0, clear.Length);
datalength = stream.Read(data, 0, data.Length);
}
return(m.ToArray());
}
static void Main(string[] args)
{
CspParameters csp = new CspParameters();
csp.KeyContainerName = "mykey";
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(csp);
var cipher = rsa.Encrypt(Encoding.UTF8.GetBytes("Hello World"), true);
Console.WriteLine(Encoding.UTF8.GetString(cipher));
Console.WriteLine(Encoding.UTF8.GetString(rsa.Decrypt(cipher, true)));
var stream = File.Open(@"C:\hello.txt", FileMode.Open, FileAccess.Read);
var signature = rsa.SignData(stream,
SHA256.Create());
stream.Close();
byte[] fileContent = new byte[1024];
File.Open(@"c:\hello.txt", FileMode.Open, FileAccess.Read).Read(fileContent, 0, 1024);
byte[] hash = SHA256.Create().ComputeHash(fileContent);
bool result = rsa.VerifyData(hash,
SHA256.Create(), signature
);
Console.WriteLine(result);
}
static public byte[] RSADecrypt(byte[] DataToDecrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
{
try
{
byte[] decryptedData;
//Create a new instance of RSACryptoServiceProvider.
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(8192))
{
//Import the RSA Key information. This needs
//to include the private key information.
RSA.ImportParameters(RSAKeyInfo);
byte[] bytes = new byte[1024];
for (int i = 0; i < 1024; i++)
{
bytes[i] = DataToDecrypt[i];
}
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
//Console.WriteLine("Big data {0}",Convert.ToBase64String(DataToDecrypt));
//Console.WriteLine("Small data {0}",Convert.ToBase64String(DataToDecrypt));
decryptedData = RSA.Decrypt(bytes, DoOAEPPadding);
}
return(decryptedData);
}
//Catch and display a CryptographicException
//to the console.
catch (CryptographicException e)
{
Console.WriteLine(e.ToString());
return(null);
}
}
/// <summary>
/// Decripta tramite chiave RSA
/// </summary>
/// <param name="key"></param>
/// <param name="encData"></param>
/// <returns></returns>
public static byte[] RSA_Decrypt(RSACryptoServiceProvider key, byte[] encData)
{
return(key.Decrypt(encData, true));
}
/// <summary>
/// Decripta un testo codificato ed in base 64 e ritorna un buffer
/// </summary>
/// <param name="key"></param>
/// <param name="encData64"></param>
/// <returns></returns>
public static byte[] RSA_Decrypt_B64(RSACryptoServiceProvider key, string encData64)
{
return(key.Decrypt(Convert.FromBase64String(encData64), true));
}
public byte[] Decrypt(byte[] value)
{
return(_provider.Decrypt(value, RSAEncryptionPadding.Pkcs1));
}
private bool DecryptFile(string inFile, string csppName)
{
cspp.KeyContainerName = csppName;
rsa = new RSACryptoServiceProvider(cspp);
try
{
string infile2 = inFile;
inFile = EncrFolder + inFile;
FileStream inFs = new FileStream(inFile, FileMode.Open);
inFile = infile2;
if (inFs.Length == 0)
{
MessageBox.Show("File is empty");
}
else
{
RijndaelManaged rjndl = new RijndaelManaged();
rjndl.KeySize = 256;
rjndl.BlockSize = 128;
rjndl.Mode = CipherMode.CBC;
byte[] LenK = new byte[4];
byte[] LenIV = new byte[4];
string outFile = DecrFolder + inFile.Substring(0, inFile.LastIndexOf(".")) + ".txt";
using (inFs)
{
inFs.Seek(0, SeekOrigin.Begin);
inFs.Seek(0, SeekOrigin.Begin);
inFs.Read(LenK, 0, 3);
inFs.Seek(4, SeekOrigin.Begin);
inFs.Read(LenIV, 0, 3);
int lenK = BitConverter.ToInt32(LenK, 0);
int lenIV = BitConverter.ToInt32(LenIV, 0);
int startC = lenK + lenIV + 8;
int lenC = (int)inFs.Length - startC;
byte[] KeyEncrypted = new byte[lenK];
byte[] IV = new byte[lenIV];
inFs.Seek(8, SeekOrigin.Begin);
inFs.Read(KeyEncrypted, 0, lenK);
inFs.Seek(8 + lenK, SeekOrigin.Begin);
inFs.Read(IV, 0, lenIV);
Directory.CreateDirectory(DecrFolder);
byte[] KeyDecrypted = rsa.Decrypt(KeyEncrypted, false);
ICryptoTransform transform = rjndl.CreateDecryptor(KeyDecrypted, IV);
using (FileStream outFs = new FileStream(outFile, FileMode.Create))
{
int count = 0;
int offset = 0;
int blockSizeBytes = rjndl.BlockSize / 8;
byte[] data = new byte[blockSizeBytes];
inFs.Seek(startC, SeekOrigin.Begin);
using (CryptoStream outStreamDecrypted = new CryptoStream(outFs, transform, CryptoStreamMode.Write))
{
do
{
count = inFs.Read(data, 0, blockSizeBytes);
offset += count;
outStreamDecrypted.Write(data, 0, count);
}while (count > 0);
outStreamDecrypted.FlushFinalBlock();
outStreamDecrypted.Close();
}
outFs.Close();
}
inFs.Close();
}
}
return(true);
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
return(false);
}
}
public byte[] Decrypt(byte[] bytes, bool fOAEP)
{
return(algorithm.Decrypt(bytes, fOAEP));
}
/// <summary>
/// 私钥解密
/// </summary>
/// <param name="encryptdata">已加密的字节数组</param>
/// <param name="xmlPublicKey">待加密的字节数组</param>
/// <returns>返回加密的字节数组</returns>
public static byte[] DecryptByPrivateKey(byte[] encryptdata, string xmlPrivateKey)
{
System.Security.Cryptography.RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.FromXmlString(xmlPrivateKey);
return(rsa.Decrypt(encryptdata, false));
}
public static byte[] Decrypt(byte[] encryptedBytes, RSAParameters privateKey, RsaKeyLengths rsaKeyLength = RsaKeyLengths.Bit2048)
{
using (var rsa = new RSACryptoServiceProvider((int)rsaKeyLength))
{
rsa.ImportParameters(privateKey);
byte[] bytes = rsa.Decrypt(encryptedBytes, DoOAEPPadding);
return bytes;
}
}
public static string Decrypt(string privateKey, string data, RsaKeyLengths length = RsaKeyLengths.Bit2048)
{
var dwKeySize = (int)length;
// TODO: Add Proper Exception Handlers
var rsaCryptoServiceProvider = new RSACryptoServiceProvider(dwKeySize);
rsaCryptoServiceProvider.FromXmlString(privateKey);
int base64BlockSize = ((dwKeySize / 8) % 3 != 0) ?
(((dwKeySize / 8) / 3) * 4) + 4 : ((dwKeySize / 8) / 3) * 4;
int iterations = data.Length / base64BlockSize;
var arrayList = new ArrayList();
for (int i = 0; i < iterations; i++)
{
byte[] encryptedBytes = Convert.FromBase64String(
data.Substring(base64BlockSize * i, base64BlockSize));
// Be aware the RSACryptoServiceProvider reverses the order of
// encrypted bytes after encryption and before decryption.
// If you do not require compatibility with Microsoft Cryptographic
// API (CAPI) and/or other vendors.
// Comment out the next line and the corresponding one in the
// EncryptString function.
Array.Reverse(encryptedBytes);
arrayList.AddRange(rsaCryptoServiceProvider.Decrypt(encryptedBytes, true));
}
return Encoding.Unicode.GetString(arrayList.ToArray(typeof(byte)) as byte[]);
}
public static byte[] RSADecrypt(byte[] dataToDecrypt, RSAParameters pars, bool padding)
{
try
{
byte[] encryptedData;
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())
{
RSA.ImportParameters(pars);
encryptedData = RSA.Decrypt(dataToDecrypt, padding);
}
return encryptedData;
}
catch (Exception)
{
return null;
}
}
public static byte[] Decrypt(byte[] encryptedBytes, string privateKeyXml, RsaKeyLengths rsaKeyLength = RsaKeyLengths.Bit2048)
{
using (var rsa = new RSACryptoServiceProvider((int)rsaKeyLength))
{
rsa.FromXmlString(privateKeyXml);
byte[] bytes = rsa.Decrypt(encryptedBytes, DoOAEPPadding);
return bytes;
}
}
public static void StartClient()
{
// Data buffer for incoming data.
byte[] bytes;
// Connect to a remote device.
try
{
// Establish the remote endpoint for the socket.
// This example uses port 11000 on the local computer.
IPHostEntry ipHostInfo = Dns.Resolve(Dns.GetHostName());
IPAddress ipAddress = ipHostInfo.AddressList[0];
IPEndPoint remoteEP = new IPEndPoint(ipAddress, 11000);
// Create a TCP/IP socket.
Socket sender = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
// Connect the socket to the remote endpoint. Catch any errors.
try
{
sender.Connect(remoteEP);
Console.WriteLine("Socket connected to {0}",
sender.RemoteEndPoint.ToString());
// Encode the data string into a byte array.
// byte[] msg = Encoding.ASCII.GetBytes("This is a test<EOF>");
// Send the data through the socket.
// int bytesSent = sender.Send(msg);
// Receive the response from the remote device.
string data = null;
bytes = new byte[16000];
while (true)
{
int bytesCount = sender.Receive(bytes);
//answer = bytes;
data = Encoding.ASCII.GetString(bytes);
if (data.IndexOf("{Key}") > -1)
{
byte[] answer = new byte[256];
for (int i = 0; i < 256; i++)
answer[i] = bytes[i + 5];
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.FromXmlString(File.ReadAllText("c:\\private.txt"));
keyAES = rsa.Decrypt(answer, false);
byte[] buff = Encoding.UTF8.GetBytes("Ключ был успешно получен!");
sender.Send(buff);
Console.Write("Сессионный ключ был успешно получен\n");
data = null;
bytesCount = sender.Receive(bytes);
//answer = bytes;
data = Encoding.ASCII.GetString(bytes);
}
if (data!=null)
{
byte[] encMes = new byte[bytesCount];
Array.Copy(bytes, 0, encMes, 0, bytesCount);
AesCryptoServiceProvider aes = new AesCryptoServiceProvider();
aes.KeySize = 256;
aes.Key = keyAES;
//aes.Padding = PaddingMode.Zeros;
byte[] iv = new byte[16];
aes.IV = iv;
ICryptoTransform decryptor = aes.CreateDecryptor(aes.Key, aes.IV);
// Create the streams used for decryption.
string plaintext;
using (MemoryStream msDecrypt = new MemoryStream(encMes))
{
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
{
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
plaintext = srDecrypt.ReadToEnd();
File.WriteAllText("c:\\result", plaintext);
Console.WriteLine("Расшифрованный принятый файл : {0}", plaintext);
}
}
}
break;
}
}
Console.Read();
// Release the socket.
sender.Shutdown(SocketShutdown.Both);
sender.Close();
}
catch (ArgumentNullException ane)
{
Console.WriteLine("ArgumentNullException : {0}", ane.ToString());
}
catch (SocketException se)
{
Console.WriteLine("SocketException : {0}", se.ToString());
}
catch (Exception e)
{
Console.WriteLine("Unexpected exception : {0}", e.ToString());
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
public static void UnusualExponentCryptRoundtrip()
{
byte[] crypt;
byte[] output;
using (var rsa = new RSACryptoServiceProvider())
{
rsa.ImportParameters(TestData.UnusualExponentParameters);
crypt = rsa.Encrypt(TestData.HelloBytes, true);
output = rsa.Decrypt(crypt, true);
}
Assert.NotEqual(crypt, output);
Assert.Equal(TestData.HelloBytes, output);
}
public static void LargeKeyCryptRoundtrip()
{
byte[] output;
using (var rsa = new RSACryptoServiceProvider())
{
try
{
rsa.ImportParameters(TestData.RSA16384Params);
}
catch (CryptographicException)
{
// The key is pretty big, perhaps it was refused.
return;
}
byte[] crypt = rsa.Encrypt(TestData.HelloBytes, true);
Assert.Equal(rsa.KeySize, crypt.Length * 8);
output = rsa.Decrypt(crypt, true);
}
Assert.Equal(TestData.HelloBytes, output);
}
/// <summary>
/// Decripta un testo codificato ed in base 64 e ritorna un testo nell'encoding specificato
/// </summary>
/// <param name="key"></param>
/// <param name="encData64"></param>
/// <param name="enc"></param>
/// <returns></returns>
public static string RSA_Decrypt_B64_Text(RSACryptoServiceProvider key, string encData64, Encoding enc)
{
return(enc.GetString(key.Decrypt(Convert.FromBase64String(encData64), true)));
}
public byte[] RSADecrypt(byte[] DataToDecrypt, RSAParameters RSAKeyInfo,bool DoOAEPPadding)
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
//Import the RSA Key information. This needs
//to include the private key information.
RSA.ImportParameters(RSAKeyInfo);
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSA.Decrypt(DataToDecrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.ToString());
return null;
}
}
/// <summary>
/// Кнопка расшифровать
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void buttonDecrypt_Click(object sender, EventArgs e)
{
// Если установлен флажок "Доп. защиты", то расшифроваем зашифрованный AES ключ с помощью доп. ключа RSA
try
{
if (checkBoxTwoKeys.Checked)
{
using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(2048))
{
rsa.FromXmlString(textBoxRsaKey.Text);
textBoxKey.Text = BitConverter.ToString(rsa.Decrypt(FromHex(textBoxKey.Text), false));
}
}
}
catch (Exception)
{
MessageBox.Show("Невозможно расшифровать основной ключ с помощью дополнительного.", "Неверные ключи.", MessageBoxButtons.OK);
return;
}
// Считывание ключа
string key = string.Empty;
string iv = string.Empty;
try
{
key = textBoxKey.Text.Substring(0, 95);
iv = textBoxKey.Text.Substring(96, 47);
}
catch (Exception)
{
MessageBox.Show("Неверный ключ!", "Ошибка!", MessageBoxButtons.OK);
return;
}
// Переносим все выбранные папки treeView в список
var selectedFolders = GetAllFilesPathFrom(Descendants(treeView.Nodes)
.Where(n => n.Checked && n.Tag != null)
.Select(n => n.Tag.ToString())
.ToArray()).ToArray();
var listPaths = GetAllFilesPathFrom(GetAllItemsFrom(listViewFiles.Items)
.Select(n => n.Text)
.ToArray()).ToArray();
string[] allPaths = selectedFolders.Union(listPaths).ToArray();
listViewFiles.Clear();
// добавляем файлы в listView
foreach (var path in allPaths)
{
listViewFiles.Items.Add(path.ToString());
}
// Проверка элементов
if (listViewFiles.Items.Count <= 0)
{
MessageBox.Show("Пожалуйста, выберите файлы для дешифрования", "Не выбраны файлы", MessageBoxButtons.OK);
return;
}
// Убираем все подсветы
UncolorItems();
// Начальные логи
logBar.Text = "Logs: Decrypt started...";
progressBar.Value = 0;
highestPercentageReached = 0;
if (backgroundCrypter.IsBusy == false && backgroundDecrypter.IsBusy == false)
{
CrypterPack decryptPack = new CrypterPack();
decryptPack.key = key;
decryptPack.iv = iv;
decryptPack.paths = allPaths;
backgroundDecrypter.RunWorkerAsync(decryptPack);
CrypterStarted(true);
}
else
{
MessageBox.Show("Процесс уже запущен.", "Невозможно запустить второй раз", MessageBoxButtons.OK);
}
}
public static byte[] decrypt(string PEMPrivateKey, byte[] data) {
byte[] decrData = null;
if ((data != null) && (PEMPrivateKey != null)) {
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
string privateKeyXml = opensslkey.DecodePEMKey(PEMPrivateKey);
if (privateKeyXml != null) {
rsa.FromXmlString(privateKeyXml);
decrData = rsa.Decrypt(data, false);
}
else {
Console.WriteLine("incorrect PEM key. " + PEMPrivateKey);
}
}
return decrData;
}