Chilkat Examples

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

Tcl Examples

Web API Categories

ASN.1
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Service Bus
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
ECC
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
Geolocation
Google APIs
Google Calendar
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
Microsoft Graph
NTLM
OAuth1
OAuth2
OneDrive
OpenSSL
Outlook
PEM
PFX/P12
POP3
PRNG
REST
REST Misc
RSA
SCP
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
SharePoint
Socket/SSL/TLS
Spider
Stream
Tar Archive
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(Tcl) Generate RSA Key and Sign a String

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 Tcl Extension Downloads

Chilkat Tcl Extension Downloads

load ./chilkat.dll

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

set rsa [new_CkRsa]

# Generate a 1024-bit RSA key pair.
set success [CkRsa_GenerateKey $rsa 1024]

# This example will sign a string, and receive the signature
# in a hex-encoded string.  Therefore, set the encoding mode
# to "hex":
CkRsa_put_EncodingMode $rsa "hex"

# If some other non-Chilkat application or web service is going to be verifying
# the signature, it is important to match the byte-ordering.
# The LittleEndian property may be set to 1
# for little-endian byte ordering, 
# or 0  for big-endian byte ordering.
# Microsoft apps typically use little-endian, while
# OpenSSL and other services (such as Amazon CloudFront)
# use big-endian.
CkRsa_put_LittleEndian $rsa 0

set strData "This is the string to be signed."

# Sign the string using the  md5 hash algorithm.
# Other valid choices are "md2", "sha256", "sha384",
# "sha512", and "sha-1".
set hexSig [CkRsa_signStringENC $rsa $strData "md5"]

puts "$hexSig"
puts [CkRsa_lastErrorText $rsa]

# Now verify the signature:
set success [CkRsa_VerifyStringENC $rsa $strData "md5" $hexSig]
if {[expr $success == 1]} then {
    puts "Signature verified!"
} else {
    puts [CkRsa_lastErrorText $rsa]
}

# Try it with an invalid signature:
set success [CkRsa_VerifyStringENC $rsa $strData "md5" "not a valid sig"]
if {[expr $success == 1]} then {
    puts "Signature verified!"
} else {
    puts [CkRsa_lastErrorText $rsa]
}

# Try it with invalid data:
set success [CkRsa_VerifyStringENC $rsa "Not the original data" "md5" $hexSig]
if {[expr $success == 1]} then {
    puts "Signature verified!"
} else {
    puts [CkRsa_lastErrorText $rsa]
}

# Try it with the wrong hash algorithm:
set success [CkRsa_VerifyStringENC $rsa $strData "sha-1" $hexSig]
if {[expr $success == 1]} then {
    puts "Signature verified!"
} else {
    puts [CkRsa_lastErrorText $rsa]
}


delete_CkRsa $rsa

 

© 2000-2019 Chilkat Software, Inc. All Rights Reserved.