Chilkat Examples

ChilkatHOME.NET Core C#Android™AutoItCC#C++Chilkat2-PythonCkPythonClassic ASPDataFlexDelphi ActiveXDelphi DLLGoJavaLianjaMono C#Node.jsObjective-CPHP ActiveXPHP ExtensionPerlPowerBuilderPowerShellPureBasicRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++VB.NETVBScriptVisual Basic 6.0Visual FoxProXojo Plugin

PHP ActiveX Examples

Web API Categories

ASN.1
AWS KMS
AWS Misc
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Key Vault
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Cloud Signature CSC
Code Signing
Compression
DKIM / DomainKey
DNS
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
Misc
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
SharePoint Online
Signing in the Cloud
Socket/SSL/TLS
Spider
Stream
Tar Archive
ULID/UUID
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl
uncategorized

 

 

 

(PHP ActiveX) ECDSA Sign and Verify

Demonstrates how to create an ECDSA signature on the SHA256 hash of some data, and then verify.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

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

// First load an ECDSA private key to be used for signing.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.PrivateKey')
$privKey = new COM("Chilkat.PrivateKey");
$success = $privKey->LoadEncryptedPemFile('qa_data/ecc/secp256r1-key-pkcs8-secret.pem','secret');
if ($success == 0) {
    print $privKey->LastErrorText . "\n";
    exit;
}

// Sign the SHA256 hash of some data.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.BinData')
$bd = new COM("Chilkat.BinData");
$success = $bd->LoadFile('qa_data/hamlet.xml');
if ($success == 0) {
    print 'Failed to load file to be hashed.' . "\n";
    exit;
}

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Crypt2')
$crypt = new COM("Chilkat.Crypt2");
$crypt->HashAlgorithm = 'sha256';
$crypt->EncodingMode = 'base64';
$hashStr = $crypt->hashBdENC($bd);

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Ecc')
$ecdsa = new COM("Chilkat.Ecc");
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Prng')
$prng = new COM("Chilkat.Prng");
// Returns ASN.1 signature as a base64 string.
$sig = $ecdsa->signHashENC($hashStr,'base64',$privKey,$prng);
print 'sig = ' . $sig . "\n";

// The signature is in ASN.1 format (which may be described as the "encoded DSS signature").
// SEQUENCE (2 elem)
//   INTEGER (255 bit) 4849395540832462044300553275435608522154141569743642905628579547100940...
//   INTEGER (255 bit) 3680701124244788134409868118208591399799457104230118295614152238560005...

// If you wish, you can get the r and s components of the signature like this:
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Asn')
$asn = new COM("Chilkat.Asn");
$asn->LoadEncoded($sig,'base64');
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Xml')
$xml = new COM("Chilkat.Xml");
$xml->LoadXml($asn->asnToXml());

print $xml->getXml() . "\n";

// We now have this:
// <?xml version="1.0" encoding="utf-8"?>
// <sequence>
//     <int>6650D422D86BA4A228B5617604E59052591B9B2C32EF324C44D09EF67E5F0060</int>
//     <int>0CFD9F6AC85042FC70F672C141BA6B2A4CAFBB906C3D907BCCC1BED62B28326F</int>
// </sequence>

// Get the "r" and "s" as hex strings
$r = $xml->getChildContentByIndex(0);
$s = $xml->getChildContentByIndex(1);

print 'r = ' . $r . "\n";
print 's = ' . $s . "\n";

// --------------------------------------------------------------------
// Now verify against the hash of the original data.

// Get the corresponding public key.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.PublicKey')
$pubKey = new COM("Chilkat.PublicKey");
$success = $pubKey->LoadFromFile('qa_data/ecc/secp256r1-pub.pem');
if ($success == 0) {
    print $pubKey->LastErrorText . "\n";
    exit;
}

// We already have the SHA256 hash of the original data (hashStr) so no need to re-do it..
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Ecc')
$ecc2 = new COM("Chilkat.Ecc");
$result = $ecc2->VerifyHashENC($hashStr,$sig,'base64',$pubKey);
if ($result != 1) {
    print $ecc2->LastErrorText . "\n";
    exit;
}

print 'Verified!' . "\n";

// Note: If we have only r,s and wish to reconstruct the ASN.1 signature, we do it like this:
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Xml')
$xml2 = new COM("Chilkat.Xml");
$xml2->Tag = 'sequence';
$xml2->NewChild2('int',$r);
$xml2->NewChild2('int',$s);

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Asn')
$asn2 = new COM("Chilkat.Asn");
$asn2->LoadAsnXml($xml2->getXml());
$encodedSig = $asn2->getEncodedDer('base64');
print 'encoded DSS signature: ' . $encodedSig . "\n";

// You can go to https://lapo.it/asn1js/  and copy/paste the base64 encodedSig into the online tool, then press the "decode" button.
// You will see the ASN.1 such as this:

// SEQUENCE (2 elem)
//   INTEGER (255 bit) 4849395540832462044300553275435608522154141569743642905628579547100940...
//   INTEGER (255 bit) 3680701124244788134409868118208591399799457104230118295614152238560005...

?>

 

© 2000-2024 Chilkat Software, Inc. All Rights Reserved.