Initializes a new instance of the class with the specified RSA algorithm.
public RSASignature(RSA rsa)
Parameters
Name
Description
The RSA algorithm.
Exceptions
Name
Description
Thrown when the rsa argument is null.
RSASignature(RSA, bool)
Initializes a new instance of the class with the specified RSA algorithm and a flag which specify to whether to add public key information to the signature.
public RSASignature(RSA rsa, bool generateKeyInfo)
Parameters
Name
Description
The RSA algorithm.
true to add public key information to signature element, false if not.
Remarks
If the public key information is not added to the signature, the RSA public key must be provided before calling the
method VerifyData.
RSASignature(int)
Initializes a new instance of the class with the specified RSA key size.
public RSASignature(int keySize)
Parameters
Name
Description
Size of the RSA key.
Examples
// Sign data using RSA algorithm with 768 bit key size
RSASignature signer = new RSASignature(768);
// A private key is needed to sign data
signer.CreateKeyPair();
byte[] data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
byte[] signature = signer.SignData(data);
// Create a new RSASignature with the public key needed
// to verify the signature
string publicKey = signer.ExportKeys(true);
RSASignature verifier = RSASignature.FromKeys(publicKey);
// Returns true
bool result = verifier.VerifyData(data, signature);
' Sign data using RSA algorithm with 768 bit key size
Dim signer As New RSASignature(768)
' A private key is needed to sign data
signer.CreateKeyPair()
Dim data As Byte() = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
Dim signature As Byte() = signer.SignData(data)
' Create a new RSASignature with the public key needed
' to verify the signature
Dim publicKey As String = signer.ExportKeys(True)
Dim verifier As RSASignature = RSASignature.FromKeys(publicKey)
' Returns true
Dim result As Boolean = verifier.VerifyData(data, signature)
RSASignature()
Initializes a new instance of the class.
public RSASignature()
Examples
// Sign data using RSA algorithm with 1024 bit key size
RSASignature signer = new RSASignature();
// A private key is needed to sign data
signer.CreateKeyPair();
byte[] data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
byte[] signature = signer.SignData(data);
// Create a new RSASignature with the public key needed
// to verify the signature
string publicKey = signer.ExportKeys(true);
RSASignature verifier = RSASignature.FromKeys(publicKey);
// Returns true
bool result = verifier.VerifyData(data, signature);
' Sign data using RSA algorithm with 1024 bit key size
Dim signer As New RSASignature()
' A private key is needed to sign data
signer.CreateKeyPair()
Dim data As Byte() = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
Dim signature As Byte() = signer.SignData(data)
' Create a new RSASignature with the public key needed
' to verify the signature
Dim publicKey As String = signer.ExportKeys(True)
Dim verifier As RSASignature = RSASignature.FromKeys(publicKey)
' Returns true
Dim result As Boolean = verifier.VerifyData(data, signature)
Creates an object from the given public and private keys.
public static RSASignature FromKeys(string rsaKey)
Parameters
Name
Description
The encoded string RSA key.
Returns
Name
Description
An instance of RSASignature.
Examples
// Sign data using RSA algorithm with 768 bit key size
RSASignature signer = new RSASignature(768);
// A private key is needed to sign data
signer.CreateKeyPair();
byte[] data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
byte[] signature = signer.SignData(data);
// Create a new RSASignature with the public key needed
// to verify the signature
string publicKey = signer.ExportKeys(true);
RSASignature verifier = RSASignature.FromKeys(publicKey);
// Returns true
bool result = verifier.VerifyData(data, signature);
' Sign data using RSA algorithm with 768 bit key size
Dim signer As New RSASignature(768)
' A private key is needed to sign data
signer.CreateKeyPair()
Dim data As Byte() = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
Dim signature As Byte() = signer.SignData(data)
' Create a new RSASignature with the public key needed
' to verify the signature
Dim publicKey As String = signer.ExportKeys(True)
Dim verifier As RSASignature = RSASignature.FromKeys(publicKey)
' Returns true
Dim result As Boolean = verifier.VerifyData(data, signature)
Exceptions
Name
Description
Thrown when one or more required arguments are null.
Writes the signature using PEM format to the specified file.
public void WritePem(string path, bool publicKeyOnly)
Parameters
Name
Description
The file path.
Whether to write only public key data.
Examples
// Sign data using RSA algorithm with 768 bit key size
RSASignature signer = new RSASignature(768);
// A private key is needed to sign data
signer.CreateKeyPair();
// Save RSA key pair to a PEM file
signer.WritePem("RSAkeys.pem", false);
// File content
// -----BEGIN RSA PRIVATE KEY-----
// MIIByQIBAAJhALsbgbJEQYSnIBZeauJ0AEIVqSlXiAhrZ+kir0A23lpxGY0xfKdo
// Sgtce+eu39+NEXiXE/XqGFGmTq3VVomYEnoSmgmfhsLvGWkI6dnLtdOfxaBvPFGy
// 6YvDDk7qMopV8QIBAwJgfL0BIYLWWG9quZRHQaKq1rkbcOUFWvJFRhcfgCSUPEtm
// XiD9xPAxXOhSmnSVP7Nf1RPt3B3syRApg/o3Cd4+B17bIqv5BbNrt3Ow5+/eFyK7
// gtRobuWu4gBfH9X5neejAjEA9zlKt/tahtXOsHoJsRg84qUnpNfCMrNfi9AmWny+
// 7AwSndeqcDkMYk7Tv1z8WKJrAjEAwb/kc8HanThBt2P6SbJ4jF8psMXPB66YSgs6
// I2cpxN+Zvlj1OyFW1nOr38w/xNgTAjEApNDceqeRrzk0daaxILrTQcNvwzqBdyI/
// sorEPFMp8rK3E+UcStCy7DSNKj39kGxHAjEAgSqYTSvnE3rWekKm28xQXZTGddk0
// r8m63Ad8F5ob2JURKZCjfMDkjvfH6ogqgzq3AjA6hGF6znnuDZTrF4iO1rVXMj1I
// lRpQ0nE0svBu9kqhoYkd17LVVfzt9u2+tcD81Wo=
// -----END RSA PRIVATE KEY-----
' Sign data using RSA algorithm with 768 bit key size
Dim signer As New RSASignature(768)
' A private key is needed to sign data
signer.CreateKeyPair()
' Save RSA key pair to a PEM file
signer.WritePem("RSAkeys.pem", False)
' File content
' -----BEGIN RSA PRIVATE KEY-----
' MIIByQIBAAJhALsbgbJEQYSnIBZeauJ0AEIVqSlXiAhrZ+kir0A23lpxGY0xfKdo
' Sgtce+eu39+NEXiXE/XqGFGmTq3VVomYEnoSmgmfhsLvGWkI6dnLtdOfxaBvPFGy
' 6YvDDk7qMopV8QIBAwJgfL0BIYLWWG9quZRHQaKq1rkbcOUFWvJFRhcfgCSUPEtm
' XiD9xPAxXOhSmnSVP7Nf1RPt3B3syRApg/o3Cd4+B17bIqv5BbNrt3Ow5+/eFyK7
' gtRobuWu4gBfH9X5neejAjEA9zlKt/tahtXOsHoJsRg84qUnpNfCMrNfi9AmWny+
' 7AwSndeqcDkMYk7Tv1z8WKJrAjEAwb/kc8HanThBt2P6SbJ4jF8psMXPB66YSgs6
' I2cpxN+Zvlj1OyFW1nOr38w/xNgTAjEApNDceqeRrzk0daaxILrTQcNvwzqBdyI/
' sorEPFMp8rK3E+UcStCy7DSNKj39kGxHAjEAgSqYTSvnE3rWekKm28xQXZTGddk0
' r8m63Ad8F5ob2JURKZCjfMDkjvfH6ogqgzq3AjA6hGF6znnuDZTrF4iO1rVXMj1I
' lRpQ0nE0svBu9kqhoYkd17LVVfzt9u2+tcD81Wo=
' -----END RSA PRIVATE KEY-----
Exceptions
Name
Description
Thrown when one or more required arguments are null.
Thrown when one or more arguments have unsupported or illegal values.
WritePem(Stream, bool)
Writes the signature using PEM format to the specified stream.
public void WritePem(Stream stream, bool publicKeyOnly)
Parameters
Name
Description
The stream to write.
Whether to write only public key data.
Exceptions
Name
Description
Thrown when one or more required arguments are null.
