Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

C# UWP/WinRT Examples

Web API Categories

ASN.1
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Azure Cloud Storage
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
EBICS
ECC
Ed25519
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
GMail SMTP/IMAP/POP
Geolocation
Google APIs
Google Calendar
Google Cloud SQL
Google Cloud Storage
Google Drive
Google Photos
Google Sheets
Google Tasks
Gzip
HTML-to-XML/Text
HTTP

HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)
Java KeyStore (JKS)
MHT / HTML Email
MIME
MS Storage Providers
Microsoft Graph
NTLM
OAuth1
OAuth2
OIDC
Office365
OneDrive
OpenSSL
Outlook
Outlook Calendar
Outlook Contact
PDF Signatures
PEM
PFX/P12
PKCS11
POP3
PRNG
REST
REST Misc
RSA
SCP
SCard
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
ScMinidriver
SharePoint
Socket/SSL/TLS
Spider
Stream
Tar Archive
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(C# UWP/WinRT) Generate RSA Key and Sign a String

See more RSA Examples

Demonstrates how to generate a new RSA public/private key pair and use it to generate a signature for a string. The (binary) digital signature is returned as a hexidecimalized string.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Rsa rsa = new Chilkat.Rsa();

// Generate a 2048-bit RSA key.
bool success = rsa.GenerateKey(2048);

// To return the signature in hex.
rsa.EncodingMode = "hex";

string strData = "This is the string to be signed.";

// Sign the SHA256 hash of the string.
string hexSig = rsa.SignStringENC(strData,"sha256");

Debug.WriteLine(hexSig);
Debug.WriteLine(rsa.LastErrorText);

// Now verify the signature:
success = rsa.VerifyStringENC(strData,"sha256",hexSig);
if (success == true) {
    Debug.WriteLine("Signature verified!");
}
else {
    Debug.WriteLine(rsa.LastErrorText);
}

// Try it with an invalid signature:
success = rsa.VerifyStringENC(strData,"sha256","not a valid sig");
if (success == true) {
    Debug.WriteLine("Signature verified!");
}
else {
    Debug.WriteLine(rsa.LastErrorText);
}

// Try it with invalid data:
success = rsa.VerifyStringENC("Not the original data","sha256",hexSig);
if (success == true) {
    Debug.WriteLine("Signature verified!");
}
else {
    Debug.WriteLine(rsa.LastErrorText);
}

// Try it with the wrong hash algorithm:
success = rsa.VerifyStringENC(strData,"sha-1",hexSig);
if (success == true) {
    Debug.WriteLine("Signature verified!");
}
else {
    Debug.WriteLine(rsa.LastErrorText);
}


 

© 2000-2022 Chilkat Software, Inc. All Rights Reserved.