(Perl) openssl smime -encrypt -des3 -in

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OpenSSL SMIME encrypt file using PEM containing a certificate.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

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

# Load the cert from a PEM file.

$pem = chilkat::CkPem->new();
# Our particular PEM was not encrypted, so we pass an empty password.
# Also, a private key is not needed for encryption.  The PEM used to test this example
# happens to have a private key, but it's not actually used.
$success = $pem->LoadPemFile("qa_data/openssl/rsaCertAndKey.pem","");
if ($success == 0) {
    print $pem->lastErrorText() . "\r\n";
    exit;
}

if ($pem->get_NumCerts() == 0) {
    print "PEM does not contain any certificates." . "\r\n";
    exit;
}

# cert is a Cert
$cert = $pem->GetCert(0);
if ($pem->get_LastMethodSuccess() == 0) {
    print $pem->lastErrorText() . "\r\n";
    exit;
}

# -------------------------------------------------------------------------------------
# Duplicate this OpenSSL command:   openssl smime -encrypt -des3 -in <file> <pem file>
# -------------------------------------------------------------------------------------
$crypt = chilkat::CkCrypt2->new();
$success = $crypt->SetEncryptCert($cert);
if ($success == 0) {
    print $crypt->lastErrorText() . "\r\n";

    exit;
}

$crypt->put_CryptAlgorithm("PKI");
$crypt->put_Pkcs7CryptAlg("3des");
$crypt->put_KeyLength(168);

# Load the file to be encrypted.
$bd = chilkat::CkBinData->new();
$success = $bd->LoadFile("qa_data/openssl/hello.txt");
if ($success == 0) {
    print "Failed to load the input file." . "\r\n";
    exit;
}

# Encrypt.
$success = $crypt->EncryptBd($bd);
if ($success == 0) {
    print $crypt->lastErrorText() . "\r\n";
    exit;
}

# The openssl smime -encrypt command produces encrypte MIME such as this:

# MIME-Version: 1.0
# Content-Disposition: attachment; filename="smime.p7m"
# Content-Type: application/x-pkcs7-mime; smime-type=enveloped-data; name="smime.p7m"
# Content-Transfer-Encoding: base64
# 
# MIICzwYJKoZIhvcNAQcDoIICwDCCArwCAQAxggF8MIIBeAIBADBgMEoxCzAJBgNVBAYTAlVTMRYw
# FAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQDExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBY
# MwISA9Nqgb1dH/XTDNeKzN1nR85iMA0GCSqGSIb3DQEBAQUABIIBAIQqPexjxWovgxwKV/r3HL/U
# EP9Yozvz5hBeX5VvRZjKSi4FRw5wapElPK+4FB82hiAR9Mi3c16PvPSVkJv3l78Mv5uaaOs/OmUz
# mIHFB6Z+l2E52BDmUVWJZTQ09vdWy6+NIRlg2R9Z1NkmZ4BZCJk6mHB/Yx03IaOxK8LnwieDMthM
# SvxbhJnIOISN7k7ofs+/0vTXUpdQ+tlmwyVySMGQ6VMk+z4sqZJ2stacqCPtt/aiSwJ9p0OKmihf
# 3KDJceXJtavIQeA97yz1LqPvle35mmd5sBhV9qQYdTV/KJ+YM5uEZ9BHYbvMJbADFHwKzhcEY3qA
# 7T9acmEsb7NycOIwggE1BgkqhkiG9w0BBwEwFAYIKoZIhvcNAwcECERX/ZoHweSkgIIBEMmCMx49
# zjVAnGqRaBbvzQT1hg0uQSxIJjxMxC+HSuM+eY9oSOsbrw4uIijHKH9NdOpeDsdRzg2z5EBM7AlP
# Ht9DyPW5C2deV6RPX4F8gyExz+JUXrd+3Yb3AKTdpDkTWDmNCeO0r/YSqp518+mfU5hG8e336u51
# HAM44FeknA8oThWsD/wUB1e8vzsatK4UXW/KSu/166V7z+VT86kd+IHa7t60U9Yp0ZXgcM5Pb5Ni
# 69Qc5MKPzom2801H5UR/WjCgsxOIjOj49sKisjRy79skrJzxY5ZG05T0dKn6KC3TjRpIEEeOyhCd
# Nm2Y7dcW8GLMepdhWay5vePmQxmvmhbAtBprIem14NcrYeG6D5wP

# We have the body in bd
# Construct the header and base64 body...
$sbEncryptedMime = chilkat::CkStringBuilder->new();

$sbEncryptedMime->AppendLine("MIME-Version: 1.0",1);
$sbEncryptedMime->AppendLine("Content-Disposition: attachment; filename=\"smime.p7m\"",1);
$sbEncryptedMime->AppendLine("Content-Type: application/x-pkcs7-mime; smime-type=enveloped-data; name=\"smime.p7m\"",1);
$sbEncryptedMime->AppendLine("Content-Transfer-Encoding: base64",1);
$sbEncryptedMime->AppendLine("",1);
$sbEncryptedMime->AppendLine($bd->getEncoded("base64_mime"),1);

# Show the result.
print $sbEncryptedMime->getAsString() . "\r\n";

# or save to a file..
$success = $sbEncryptedMime->WriteFile("qa_output/encryptedMime.txt","utf-8",0);