Perl Requires Chilkat v11.0.0+

Duplicate openssl dgst -md5 -sign myKey.pem something.txt | openssl enc -base64 -A

See more RSA Examples

Demonstrates how to duplicate the creation of an RSA signature produced by this OpenSSL command:

openssl dgst -md5 -sign myKey.pem something.txt | openssl enc -base64 -A

Perl

use chilkat();

$success = 0;

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

$pkey = chilkat::CkPrivateKey->new();

#  Load the private key from an RSA PEM file:
$success = $pkey->LoadPemFile("myKey.pem");

$rsa = chilkat::CkRsa->new();

#  Import the private key into the RSA component:
$success = $rsa->UsePrivateKey($pkey);
if ($success == 0) {
    print $rsa->lastErrorText() . "\r\n";
    exit;
}

#  OpenSSL uses BigEndian byte ordering:
$rsa->put_LittleEndian(0);

#  The resulting signature will be a Base64 string:
$rsa->put_EncodingMode("base64");

#  For simplicity, we're not loading
#  the data to be signed from a file.  We are instead simply
#  using a literal string value.  
$strData = "This is the text to be signed.";

#  Hash the input using MD5, and then sign the hash:
#  Other valid hash algorithm choices are "md2" and "sha-1".
$base64Sig = $rsa->signStringENC($strData,"md5");

print $base64Sig . "\r\n";

print "Success!" . "\r\n";