【发布时间】：2018-04-02 03:15:09
【问题描述】：
我正在尝试加密文本并使用公钥对对其进行解密。我需要将密钥作为字符串处理。所以我将这些密钥从字符串转换为 RSAParameters。但是当我尝试加密文本时，它会抛出一个错误，因为“句柄无效”。
static RSAParameters _publicKey = new RSAParameters();
static RSAParameters _privateKey = new RSAParameters();
static string _strPublicKey = "-----BEGIN PUBLIC KEY-----\r\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsG5sBbnH7gXkrExzNOeK\r\nEjoRDHUH5uU+crH52Z1uXCEx8LiFow8RwrvZGqjYXgBwxzqOQwHJt3utoNVY0niP\r\nHjfPXwKTk79PkeET/mtRar1gEcCOr0/hgHxT3YGlQLw2ugVIulMzlUBRY4rceNv3\r\nEiSZ+4cnO04hJ6UiftrCfwTe6q9Hadp6B6SX+N9hgcHhRX4iR/VYUf/6cvN+NAgb\r\ntuF0Dk61C6ulh2Gvdj2TBCLaq1LPF5H+ghrRxjK/Zn6MG9BW2ju9g8zYKuufaaaM\r\ndbTmN+Z4f27nEOxFq5wWqeaWl53yrMia6xnOi7vtU8zcwBL7jSLgwrkyO8LabCdz\r\neQIDAQAB\r\n-----END PUBLIC KEY-----";
static string _strPrivateKey = "-----BEGIN RSA PRIVATE KEY-----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\r\nDsUL5Ia5W7/Cm7d0/nqchUCkRslIsH+bfGj0NZ7qcE5H1D8Ee0A=\r\n-----END RSA PRIVATE KEY-----";
static void Main(string[] args)
{
var message = "Hello World!";
var data = Encrypt(message);
var res = Decrypt(data);
}
private static RSAParameters GetRSAParameters(string pPublicKey)
{
byte[] lDer;
//Set RSAKeyInfo to the public key values.
int lBeginStart = "-----BEGIN PUBLIC KEY-----".Length;
int lEndLenght = "-----END PUBLIC KEY-----".Length;
string KeyString = pPublicKey.Substring(lBeginStart, (pPublicKey.Length - lBeginStart - lEndLenght));
lDer = Convert.FromBase64String(KeyString);
//Create a new instance of the RSAParameters structure.
RSAParameters lRSAKeyInfo = new RSAParameters();
lRSAKeyInfo.Modulus = GetModulus(lDer);
lRSAKeyInfo.Exponent = GetExponent(lDer);
return lRSAKeyInfo;
}
private static byte[] GetModulus(byte[] pDer)
{
//Size header is 29 bits
//The key size modulus is 128 bits, but in hexa string the size is 2 digits => 256
string lModulus = BitConverter.ToString(pDer).Replace("-", "").Substring(58, 256);
return StringHexToByteArray(lModulus);
}
private static byte[] GetExponent(byte[] pDer)
{
int lExponentLenght = pDer[pDer.Length - 3];
string lExponent = BitConverter.ToString(pDer).Replace("-", "").Substring((pDer.Length * 2) - lExponentLenght * 2, lExponentLenght * 2);
return StringHexToByteArray(lExponent);
}
public static byte[] StringHexToByteArray(string hex)
{
return Enumerable.Range(0, hex.Length)
.Where(x => x % 2 == 0)
.Select(x => Convert.ToByte(hex.Substring(x, 2), 16))
.ToArray();
}
public static string Encrypt(string mess)
{
string response = "";
var input = Encoding.UTF8.GetBytes(mess);
using (var rsa = new RSACryptoServiceProvider(1024))
{
rsa.PersistKeyInCsp = false;
rsa.ImportParameters(GetRSAParameters(_strPublicKey));
var decrypt = rsa.Encrypt(input, true);
response = Convert.ToBase64String(decrypt);
}
return response;
}
public static string Decrypt(string mess)
{
string response = "";
var input = Convert.FromBase64String(mess);
using (var rsa = new RSACryptoServiceProvider(2048))
{
rsa.PersistKeyInCsp = false;
rsa.ImportParameters(GetRSAParameters(_strPublicKey));
var decrypt = rsa.Decrypt(input, false);
response = Encoding.UTF8.GetString(decrypt);
}
return response;
}
上面是我用来加密和解密的代码。转换后，我将它们转换为字符串并将其传递给解密函数。请指教
【问题讨论】：
标签： c# cryptography rsa public-key-encryption private-key