阅读RSA PrivateKey在C＃和充气城堡 [英] Read RSA PrivateKey in C# and Bouncy Castle
本文介绍了阅读RSA PrivateKey在C＃和充气城堡的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我已经成功地写入与OpenSSL的格式公钥和私钥文件
I have successfully written to public and private key files with OpenSSL format.
文件：
-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCpHCHYgawzNlxVebSKXL7vfc/i
hP+dQgMxlaPEi7/vpQtV2szHjIP34MnUKelXFuIETJjOgjWAjTTJoj38MQUWc3u7
SRXaGVggqQEKH+cRi5+UcEObIfpi+cIyAm9MJqKabfJK2e5X/OS7FgAwPjgtDbZO
ZxamOrWWL8KGB+lH+QIDAQAB
-----END PUBLIC KEY-----
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
和公共密钥只包含课程的公钥部分。
And public key contains just the public key portion of course.
使用公钥加密我的消息后。我想读的私钥文件
和解密，但它不工作。 。我得到的例外尝试读取私钥说法不能施放对象asymmetriccipherkey
After encrypting my message using the public key. I want to read the private key file and decrypt it but it's not working. I'm getting exceptions trying to read the private key saying can't cast object to asymmetriccipherkey.
下面是我的代码：
public static AsymmetricKeyParameter ReadAsymmetricKeyParameter(string pemFilename)
{
var fileStream = System.IO.File.OpenText(pemFilename);
var pemReader = new Org.BouncyCastle.OpenSsl.PemReader(fileStream);
var KeyParameter = (Org.BouncyCastle.Crypto.AsymmetricKeyParameter)pemReader.ReadObject();
return KeyParameter;
}
static void Encrypt2(string publicKeyFileName, string inputMessage, string encryptedFileName)
{
UTF8Encoding utf8enc = new UTF8Encoding();
FileStream encryptedFile = null;
try
{
// Converting the string message to byte array
byte[] inputBytes = utf8enc.GetBytes(inputMessage);
// RSAKeyPairGenerator generates the RSA Key pair based on the random number and strength of key required
/*RsaKeyPairGenerator rsaKeyPairGnr = new RsaKeyPairGenerator();
rsaKeyPairGnr.Init(new Org.BouncyCastle.Crypto.KeyGenerationParameters(new SecureRandom(), 512));
Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair keyPair = rsaKeyPairGnr.GenerateKeyPair();
*/
AsymmetricKeyParameter publicKey = ReadAsymmetricKeyParameter(publicKeyFileName);
// Creating the RSA algorithm object
IAsymmetricBlockCipher cipher = new RsaEngine();
// Initializing the RSA object for Encryption with RSA public key. Remember, for encryption, public key is needed
cipher.Init(true, publicKey);
//Encrypting the input bytes
byte[] cipheredBytes = cipher.ProcessBlock(inputBytes, 0, inputMessage.Length);
//Write the encrypted message to file
// Write encrypted text to file
encryptedFile = File.Create(encryptedFileName);
encryptedFile.Write(cipheredBytes, 0, cipheredBytes.Length);
}
catch (Exception ex)
{
// Any errors? Show them
Console.WriteLine("Exception encrypting file! More info:");
Console.WriteLine(ex.Message);
}
finally
{
// Do some clean up if needed
if (encryptedFile != null)
{
encryptedFile.Close();
}
}
}
下面是解密功能。注：第二个是不使用充气城堡，但是，我宁愿使用充气城堡，因为我以后也可以加密和Java中解密。
Here is the decrypt function. 2nd one is without using Bouncy Castle, however, I'd rather use Bouncy Castle since later I'll be also encrypting and decrypting in Java.
static void Decrypt2(string privateKeyFileName, string encryptedFileName, string plainTextFileName)
{
UTF8Encoding utf8enc = new UTF8Encoding();
FileStream encryptedFile = null;
StreamWriter plainFile = null;
byte[] encryptedBytes = null;
string plainText = "";
try
{
// Converting the string message to byte array
//byte[] inputBytes = utf8enc.GetBytes(inputMessage);
// RSAKeyPairGenerator generates the RSA Key pair based on the random number and strength of key required
/*RsaKeyPairGenerator rsaKeyPairGnr = new RsaKeyPairGenerator();
rsaKeyPairGnr.Init(new Org.BouncyCastle.Crypto.KeyGenerationParameters(new SecureRandom(), 512));
Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair keyPair = rsaKeyPairGnr.GenerateKeyPair();
*/
StreamReader sr = File.OpenText(privateKeyFileName);
PemReader pr = new PemReader(sr);
PemReader pemReader = new PemReader(new StringReader(privateKeyFileName));
AsymmetricCipherKeyPair keyPair = (AsymmetricCipherKeyPair)pemReader.ReadObject();
Console.WriteLine(keyPair.ToString());
AsymmetricKeyParameter privatekey = keyPair.Private;
Console.WriteLine(pr.ReadPemObject());
AsymmetricCipherKeyPair KeyPair = (AsymmetricCipherKeyPair)pr.ReadObject();
AsymmetricKeyParameter privateKey = ReadAsymmetricKeyParameter(privateKeyFileName);
// Creating the RSA algorithm object
IAsymmetricBlockCipher cipher = new RsaEngine();
Console.WriteLine("privateKey: " + privateKey.ToString());
// Initializing the RSA object for Decryption with RSA private key. Remember, for decryption, private key is needed
//cipher.Init(false, KeyPair.Private);
//cipher.Init(false, KeyPair.Private);
cipher.Init(false, keyPair.Private);
// Read encrypted text from file
encryptedFile = File.OpenRead(encryptedFileName);
encryptedBytes = new byte[encryptedFile.Length];
encryptedFile.Read(encryptedBytes, 0, (int)encryptedFile.Length);
//Encrypting the input bytes
//byte[] cipheredBytes = cipher.ProcessBlock(inputBytes, 0, inputMessage.Length);
byte[] cipheredBytes = cipher.ProcessBlock(encryptedBytes, 0, encryptedBytes.Length);
//Write the encrypted message to file
// Write encrypted text to file
plainFile = File.CreateText(plainTextFileName);
plainText = Encoding.Unicode.GetString(cipheredBytes);
plainFile.Write(plainText);
}
catch (Exception ex)
{
// Any errors? Show them
Console.WriteLine("Exception encrypting file! More info:");
Console.WriteLine(ex.Message);
}
finally
{
// Do some clean up if needed
if (plainFile != null)
{
plainFile.Close();
}
if (encryptedFile != null)
{
encryptedFile.Close();
}
}
}
// Decrypt a file
static void Decrypt(string privateKeyFileName, string encryptedFileName, string plainFileName)
{
// Variables
CspParameters cspParams = null;
RSACryptoServiceProvider rsaProvider = null;
StreamReader privateKeyFile = null;
FileStream encryptedFile = null;
StreamWriter plainFile = null;
string privateKeyText = "";
string plainText = "";
byte[] encryptedBytes = null;
byte[] plainBytes = null;
try
{
// Select target CSP
cspParams = new CspParameters();
cspParams.ProviderType = 1; // PROV_RSA_FULL
//cspParams.ProviderName; // CSP name
rsaProvider = new RSACryptoServiceProvider(cspParams);
// Read private/public key pair from file
privateKeyFile = File.OpenText(privateKeyFileName);
privateKeyText = privateKeyFile.ReadToEnd();
// Import private/public key pair
rsaProvider.FromXmlString(privateKeyText);
// Read encrypted text from file
encryptedFile = File.OpenRead(encryptedFileName);
encryptedBytes = new byte[encryptedFile.Length];
encryptedFile.Read(encryptedBytes, 0, (int)encryptedFile.Length);
// Decrypt text
plainBytes = rsaProvider.Decrypt(encryptedBytes, false);
// Write decrypted text to file
plainFile = File.CreateText(plainFileName);
plainText = Encoding.Unicode.GetString(plainBytes);
plainFile.Write(plainText);
}
catch (Exception ex)
{
// Any errors? Show them
Console.WriteLine("Exception decrypting file! More info:");
Console.WriteLine(ex.Message);
}
finally
{
// Do some clean up if needed
if (privateKeyFile != null)
{
privateKeyFile.Close();
}
if (encryptedFile != null)
{
encryptedFile.Close();
}
if (plainFile != null)
{
plainFile.Close();
}
}
} // Decrypt
任何帮助将不胜感激！
推荐答案
我想通了这一点。基本上读取使用BouncyCastle的和C＃的私人OpenSSL的关键是这样的：
I figured this out. Basically to read a private openssl key using BouncyCastle and C# is like this:
static AsymmetricKeyParameter readPrivateKey(string privateKeyFileName)
{
AsymmetricCipherKeyPair keyPair;
using (var reader = File.OpenText(privateKeyFileName))
keyPair = (AsymmetricCipherKeyPair)new PemReader(reader).ReadObject();
return keyPair.Private;
}
那么这个键可以用来解密，如下面的数据：
Then this key can be used to decrypt data such as below:
AsymmetricKeyParameter key = readPrivateKey(pemFilename);
RsaEngine e = new RsaEngine();
e.Init(false, key);
byte[] decipheredBytes = e.ProcessBlock(cipheredData, 0, cipheredData.Length);
这篇关于阅读RSA PrivateKey在C＃和充气城堡的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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