C#

RSACryptoServiceProvider RSA;<br />
RSA = new RSACryptoServiceProvider();<br />
byte[] rawData, hash;<br />
HashAlgorithm HashMan;<br />
HashMan = new SHA1CryptoServiceProvider();<br />
rawData= System.Text.Encoding.Unicode.GetBytes(string PASSWORD); ///get the bytes of the original password<br />
hash = HashMan.ComputeHash(rawData); //uses the private key to generate the hash<br />
RSAPKCS1SignatureFormatter sf = new RSAPKCS1SignatureFormatter(RSA);   //this one will use the public key to encode it more                    <br />
sf.SetHashAlgorithm("SHA1");<br />
byte []FinalSignature= sf.CreateSignature(hash); //creates the signature, u will send this one to the receiver along with the public key<br />
<br />
RSA.ExportParameters(false); //this both sentences will give the public key, if u pass them true will give also the private key.<br />
RSA.ToXMLString(false);

<br />
//if u used the RSA.EXPORTPARAMETERS<br />
RSAPKCS1SignatureDeformatter sd=new RSAPKCS1SignatureDeformatter(parameters);<br />
// or if u used the xml string<br />
RSAPKCS1SignatureDeformatter sd=new RSAPKCS1SignatureDeformatter();<br />
sd.FromXMLString(string xmlParameters);<br />
//<br />
sd.SetHashAlgorithm("SHA1");<br />
bool pd=sd.VerifySignature(hashinurdatabase,FinalSignature);<br />
<br />

HashAlgorithm HashMan;<br />
HashMan = new SHA1CryptoServiceProvider();<br />
rawData= System.Text.Encoding.Unicode.GetBytes(string PASSWORD); <br />
hash = HashMan.ComputeHash(rawData);<br />
RSAPKCS1SignatureFormatter sf = new RSAPKCS1SignatureFormatter(RSA);<br />
sf.SetHashAlgorithm("SHA1");<br />
byte[] FinalSignature= sf.CreateSignature(hash); 

rawData = System.Text.Encoding.Unicode.GetBytes(string PASSWORD); <br />
byte[] FinalSignature = RSA.SignData(rawData, "SHA1");