Asp.net tripledes encryption and decryption algorithms

Using system;

Using system. Collections. Generic;

Using system. LINQ;

Using system. text;

Using system. Security. cryptography;

Using system. IO;

Namespace windowsformsapplication1

{

# Region tripledesAlgorithm

Public class classtripledes

{

Public classtripledes ()

{

}

// Encryption: Use the password to generate the public key of the encryption algorithm, and use tripledes to encrypt the password.

Public static string encrypt (string pass)

{

Try

{

Byte [] bt = (new system. Text. unicodeencoding (). getbytes (PASS );

Passwordderivebytes PDB = new passwordderivebytes (Pass, null );

Byte [] Key = PDB. getbytes (24 );

Byte [] IV = PDB. getbytes (8 );

Memorystream MS = new memorystream ();

Tripledescryptoserviceprovider tdesc = new tripledescryptoserviceprovider ();

Cryptostream cs = new cryptostream (MS, tdesc. createencryptor (Key, IV), cryptostreammode. Write );

CS. Write (BT, 0, BT. Length );

CS. flushfinalblock ();

Return convert. tobase64string (Ms. toarray ());

}

Catch (exception ex)

{

Throw ex;

}

}

// Decrypt, generate the public key of the encryption algorithm using the password, and use tripledes to decrypt the encrypted data.

Public static string decrypt (string STR, string pass)

{

Try

{

Byte [] bt = convert. frombase64string (STR );

Passwordderivebytes PDB = new passwordderivebytes (Pass, null );

Byte [] Key = PDB. getbytes (24 );

Byte [] IV = PDB. getbytes (8 );

Memorystream MS = new memorystream ();

Tripledescryptoserviceprovider tdesc = new tripledescryptoserviceprovider ();

Cryptostream cs = new cryptostream (MS, tdesc. createdecryptor (Key, IV), cryptostreammode. Write );

CS. Write (BT, 0, BT. Length );

CS. flushfinalblock ();

Return (new system. Text. unicodeencoding (). getstring (Ms. toarray ());

}

Catch (exception ex)

{

Throw ex;

}

}

// Use:

// String STR = encrypt ("BBB ");

// Console. writeline (decrypt (STR, "BBB "));

// Encryption: Use the password to generate the public key of the encryption algorithm, and use tripledes to encrypt the password.

Public static string encryptwithkey (string pass, string p_key)

{

Try

{

Byte [] bt = (new system. Text. unicodeencoding (). getbytes (PASS );

Passwordderivebytes PDB = new passwordderivebytes (p_key, null );

Byte [] Key = PDB. getbytes (24 );

Byte [] IV = PDB. getbytes (8 );

Memorystream MS = new memorystream ();

Tripledescryptoserviceprovider tdesc = new tripledescryptoserviceprovider ();

Cryptostream cs = new cryptostream (MS, tdesc. createencryptor (Key, IV), cryptostreammode. Write );

CS. Write (BT, 0, BT. Length );

CS. flushfinalblock ();

Return convert. tobase64string (Ms. toarray ());

}

Catch (exception ex)

{

Throw ex;

}

}

// Decrypt, generate the public key of the encryption algorithm using the password, and use tripledes to decrypt the encrypted data.

Public static string decryptwithkey (string STR, string p_key)

{

Try

{

Byte [] bt = convert. frombase64string (STR );

Passwordderivebytes PDB = new passwordderivebytes (p_key, null );

Byte [] Key = PDB. getbytes (24 );

Byte [] IV = PDB. getbytes (8 );

Memorystream MS = new memorystream ();

Tripledescryptoserviceprovider tdesc = new tripledescryptoserviceprovider ();

Cryptostream cs = new cryptostream (MS, tdesc. createdecryptor (Key, IV), cryptostreammode. Write );

CS. Write (BT, 0, BT. Length );

CS. flushfinalblock ();

Return (new system. Text. unicodeencoding (). getstring (Ms. toarray ());

}

Catch (exception ex)

{

Throw ex;

}

}

}

# Endregion

}