. NET implementation MD5 encryption SHA1 encryption SHA256 encryption sha384 encryption sha512 encrypted DES encryption and decryption

Write the project, the backstage has been used MD5 encryption, a day group of people ask, in addition to MD5 there are other encryption methods? At that time only know there is a sha, but how to realize what is not clear, so when the internet looked for, the several common encryption methods are collated under, with WinForm wrote a program,:

Key code

Using System.Security;
Using System.Security.Cryptography;
Using System.Web;
Using System.IO;

MD5 is case-insensitive
Type, 16-bit or 32-bit, 16-bit is the 8th to 16th bit to take 32 bits
public string Domd5encode (string pwd,string type)
{
Byte[] result = Encoding.Default.GetBytes (PWD);
MD5CryptoServiceProvider MD5 = new MD5CryptoServiceProvider ();
byte[] Output = Md5.computehash (result);
if (type = = "16")
return bitconverter.tostring (Output). Replace ("-", ""). ToLower (). Substring (8,16);
Else
return bitconverter.tostring (Output). Replace ("-", ""). ToLower ();

}

<summary>
SHA1 Encryption of strings
</summary>
<param name= "Strin" > Strings that need to be encrypted </param>
<returns> redaction </returns>
public string Sha1_encrypt (string source_string)
{
byte[] Strres = Encoding.Default.GetBytes (source_string);
HashAlgorithm ISHA = new SHA1CryptoServiceProvider ();
Strres = Isha.computehash (strres);
StringBuilder entext = new StringBuilder ();
foreach (Byte ibyte in strres)
{
Entext.appendformat ("{0:x2}", Ibyte);
}
return entext.tostring ();
}

<summary>
SHA256 encryption, irreversible
</summary>
<param name= "str" >string str: Encrypted string </param>
<returns> returns the encrypted string </returns>
private string Sha256encrypt (String str)
{
System.Security.Cryptography.SHA256 s256 = new System.Security.Cryptography.SHA256Managed ();
Byte[] byte1;
Byte1 = S256.computehash (Encoding.Default.GetBytes (str));
s256. Clear ();
Return convert.tobase64string (BYTE1);
}

<summary>
SHA384 encryption, irreversible
</summary>
<param name= "str" >string str: Encrypted string </param>
<returns> returns the encrypted string </returns>
private string Sha384encrypt (String str)
{
System.Security.Cryptography.SHA384 s384 = new System.Security.Cryptography.SHA384Managed ();
Byte[] byte1;
Byte1 = S384.computehash (Encoding.Default.GetBytes (str));
s384. Clear ();
Return convert.tobase64string (BYTE1);
}

<summary>
SHA512 encryption, irreversible
</summary>
<param name= "str" >string str: Encrypted string </param>
<returns> returns the encrypted string </returns>
private string Sha512encrypt (String str)
{
System.Security.Cryptography.SHA512 s512 = new System.Security.Cryptography.SHA512Managed ();
Byte[] byte1;
Byte1 = S512.computehash (Encoding.Default.GetBytes (str));
s512. Clear ();
Return convert.tobase64string (BYTE1);
}

Default key vector
Private byte[] Keys = {0xEF, 0xAB, 0x56, 0x78, 0x90, 0x34, 0xCD, 0x12};
<summary>
Des encrypted string
</summary>
<param name= "encryptstring" > Strings to be encrypted </param>
<param name= "Encryptkey" > Encryption key, required for 8-bit </param>
<returns> encryption successfully returns the encrypted string, failed to return the source string </returns>
public string Encryptdes (string encryptstring, String encryptkey)
{
Try
{
byte[] RgbKey = Encoding.UTF8.GetBytes (encryptkey.substring (0, 8));
byte[] Rgbiv = Keys;
byte[] Inputbytearray = Encoding.UTF8.GetBytes (encryptstring);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider ();
MemoryStream mstream = new MemoryStream ();
CryptoStream cstream = new CryptoStream (Mstream, Dcsp.createencryptor (RgbKey, Rgbiv), cryptostreammode.write);
Cstream.write (Inputbytearray, 0, inputbytearray.length);
Cstream.flushfinalblock ();
Return convert.tobase64string (Mstream.toarray ());
}
Catch
{
return encryptstring;
}
}

<summary>
Des decryption string
</summary>
<param name= "Decryptstring" > String to Decrypt </param>
<param name= "Decryptkey" > Decryption key, required for 8-bit, same as encryption key </param>
<returns> decryption succeeded in returning the decrypted string, failed to return to the source string </returns>
public string Decryptdes (string decryptstring, String decryptkey)
{
Try
{
byte[] RgbKey = Encoding.UTF8.GetBytes (decryptkey.substring (0, 8));
byte[] Rgbiv = Keys;
byte[] Inputbytearray = convert.frombase64string (decryptstring);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider ();
MemoryStream mstream = new MemoryStream ();
CryptoStream cstream = new CryptoStream (Mstream, DCSP. CreateDecryptor (RgbKey, Rgbiv), cryptostreammode.write);
Cstream.write (Inputbytearray, 0, inputbytearray.length);
Cstream.flushfinalblock ();
Return Encoding.UTF8.GetString (Mstream.toarray ());
}
Catch
{
return decryptstring;
}
}

Go: goody9807. NET implementation MD5 encryption SHA1 encryption SHA256 encryption sha384 encryption sha512 encrypt des encryption decryption

. NET implementation MD5 encryption SHA1 encryption SHA256 encryption sha384 encryption sha512 encrypted DES encryption and decryption