Perl

Apple Keychain - Create RSA Signature

See more Apple Keychain Examples

Using an RSA private key stored in the Apple Keychain, create a signature by signing the SHA-256 hash of the provided string, then return the signature encoded in Base64 format.

Note: This example requires Chilkat v10.0.0 or greater.

Perl

use chilkat();

$success = 0;

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

$cert = chilkat::CkCert->new();

# On MacOS and iOS, the LoadByCommonName function will search the Apple Keychain for the matching certificate.

# A digital certificate's Common Name (CN) is a field in the certificate that specifies the name of the entity the 
# certificate is issued to. It is often used to identify the domain name, hostname, or organization the certificate represents. 

# For example:
# - In an SSL/TLS certificate for a website, the CN typically contains the domain name (e.g., "www.example.com").
# - For certificates representing individuals or organizations, the CN might include the person's name or the organization's name.

# The CN is part of the certificate's Subject field and is crucial for verifying that the certificate corresponds 
# to the intended entity, especially in SSL/TLS communications.

$success = $cert->LoadByCommonName("Example, Inc.");
if ($success == 0) {
    print $cert->lastErrorText() . "\r\n";
    exit;
}

$rsa = chilkat::CkRsa->new();
$success = $rsa->SetX509Cert($cert,1);
if ($success == 0) {
    print $rsa->lastErrorText() . "\r\n";
    exit;
}

# Generate an RSA signature by signing the SHA-256 hash of the provided string, 
# then return the signature encoded in Base64 format.
$rsa->put_EncodingMode("base64");
$sigBase64 = $rsa->signStringENC("to be signed","sha256");
if ($rsa->get_LastMethodSuccess() == 0) {
    print $rsa->lastErrorText() . "\r\n";
    exit;
}

print "RSA Signature:" . "\r\n";
print $sigBase64 . "\r\n";