Perl

Save a Private Key as a Traditional PEM File

Demonstrates the Chilkat PrivateKey.SavePemFile method, which saves the key as unencrypted PEM, preferring a traditional algorithm-specific representation (for example RSA PRIVATE KEY). The only argument is the destination path.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: The file-writing form of GetPkcs1Pem, producing the legacy per-algorithm PEM that some older software requires. Prefer SavePkcs8PemFile for modern interoperability; use this when a consumer specifically needs the traditional layout. The PEM is unencrypted.

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use strict;
use warnings;
use Chilkat2;

# Load a private key to export.
my $privKey = Chilkat2::PrivateKey->new;
my $success = $privKey->LoadPemFile('qa_data/private.pem');
if (!$success) {
    print $privKey->LastErrorText, "\n";
    exit;
}

# Save as unencrypted PEM, preferring the traditional algorithm-specific representation (for
# example "RSA PRIVATE KEY" for RSA).
$success = $privKey->SavePemFile('qa_output/private.pem');
if (!$success) {
    print $privKey->LastErrorText, "\n";
    exit;
}

print "Saved.\n";