в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

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2010-05-26T12:17:57Z

1 версия

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==Asymmetric cryptography==

<source lang="csharp">using System;
using System.IO;
using System.Security.Cryptography;
class MainClass
{
public static void Main()
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
Byte[] testData = {1, 2, 3, 4, 5, 6, 7, 8};
Byte[] encryptedData = rsa.Encrypt(testData, false);
Console.WriteLine("Encrypted data:");
for(int i=0; i<encryptedData.GetLength(0); i++)
{
Console.Write("{0} ", encryptedData[i]);
}
Byte[] decryptedData = rsa.Decrypt(encryptedData, false);
Console.WriteLine("Decrypted Data:");
for(int i=0; i<decryptedData.GetLength(0); i++)
{
Console.Write("{0} ", decryptedData[i]);
}
}
}</source>
<pre class=codeResult>Encrypted data:
105 216 155 138 34 149 122 27 220 172 6 69 23 21 224 142 30 166 81 141 15 234 144 235 122 187 99 245
222 252 154 234 211 79 251 80 253 221 94 91 222 86 225 17 0 96 161 179 155 251 123 140 38 6 161 78
111 193 19 222 251 74 172 104 100 61 39 106 113 67 69 45 237 47 194 189 62 168 98 230 196 149 249 11
3 29 19 66 10 84 73 110 142 142 255 120 138 200 207 79 190 151 164 53 4 198 254 78 203 86 102 233 10
7 216 13 41 166 125 155 58 48 214 27 116 93 211 176 191 183 Decrypted Data:
1 2 3 4 5 6 7 8</pre>

==Encrypt with RSACryptoServiceProvider==

<source lang="csharp">using System;
using System.IO;
using System.Security;
using System.Security.Cryptography;
using System.Collections.Generic;
using System.Text;
class Program
{
static void Main(string[] args)
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
StreamReader sr = File.OpenText("myKey.xml");
string rsaXml = sr.ReadToEnd();
sr.Close();
rsa.FromXmlString(rsaXml);
string messageToJane = "this is a test";
byte[] encrypted = rsa.Encrypt(System.Text.ASCIIEncoding.ASCII.GetBytes(messageToJane), false);
FileStream fs = new FileStream("Message.dat", FileMode.Create);
fs.Write(encrypted, 0, encrypted.Length);
fs.Close();
}
}</source>

==RSACryptoServiceProvider reads from xml key==

<source lang="csharp">using System;
using System.IO;
using System.Security;
using System.Security.Cryptography;
using System.Collections.Generic;
using System.Text;
class Program
{
static void Main(string[] args)
{
StreamReader sr = File.OpenText("myKey.xml");
string myKey = sr.ReadToEnd();
sr.Close();
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.FromXmlString(myKey);
FileStream fs = new FileStream("Message.dat", FileMode.Open);
byte[] encrypted = new byte[fs.Length];
fs.Read(encrypted, 0, (int)fs.Length);
byte[] decrypted = rsa.Decrypt(encrypted, false);
fs.Close();
Console.WriteLine(System.Text.ASCIIEncoding.ASCII.GetString(decrypted));

}
}</source>

==Using RSACryptoServiceProvider==

<source lang="csharp">using System;
using System.IO;
using System.Security.Cryptography;
using System.Collections.Generic;
using System.Text;
class Program
{
static void Main(string[] args)
{
string verifiableMesage = "this is a test";
SHA1Managed sha = new SHA1Managed();
byte[] hashValue = sha.ruputeHash(System.Text.ASCIIEncoding.ASCII.GetBytes(verifiableMesage));
StreamReader sr = File.OpenText("Key.xml");
string myKey = sr.ReadToEnd();
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.FromXmlString(myKey);
RSAPKCS1SignatureFormatter sigFormatter = new RSAPKCS1SignatureFormatter(rsa);
sigFormatter.SetHashAlgorithm("SHA1");
byte[] signedHash = sigFormatter.CreateSignature(hashValue);
FileStream fs = new FileStream("signedHash.dat", FileMode.Create);
fs.Write(signedHash, 0, signedHash.Length);
fs.Close();
}
}</source>

==Using RSAPKCS1SignatureDeformatter==

<source lang="csharp">using System;
using System.IO;
using System.Security;
using System.Security.Cryptography;
using System.Collections.Generic;
using System.Text;
class Program
{
static void Main(string[] args)
{
string verifiableMesage = "this is a test";
string wrongMessage = "this is another test";
SHA1Managed sha = new SHA1Managed();
byte[] verifiableMessageHash = sha.ruputeHash(System.Text.ASCIIEncoding.ASCII.GetBytes(verifiableMesage));
byte[] wrongMessageHash = sha.ruputeHash(System.Text.ASCIIEncoding.ASCII.GetBytes(wrongMessage));
FileStream fs = new FileStream("signedHash.dat", FileMode.Open);
byte[] fileHash = new byte[fs.Length];
fs.Read(fileHash, 0, (int)fs.Length);
fs.Close();
StreamReader sr = File.OpenText("myKey.xml");
string myKey = sr.ReadToEnd();
sr.Close();
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.FromXmlString(myKey);
RSAPKCS1SignatureDeformatter sigDeformatter = new RSAPKCS1SignatureDeformatter(rsa);
sigDeformatter.SetHashAlgorithm("SHA1");
Console.WriteLine(sigDeformatter.VerifySignature(verifiableMessageHash, fileHash));
Console.WriteLine(sigDeformatter.VerifySignature(wrongMessageHash, fileHash) == false);
}
}</source>

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в 15:31, 26 мая 2010

Admin: 1 версия