90 lines
4.1 KiB
Plaintext
90 lines
4.1 KiB
Plaintext
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<?php
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/**
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* This example shows signing a message and then sending it via the mail() function of PHP.
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*
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* Before you can sign the mail certificates are needed.
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*
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*
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* STEP 1 - Creating a certificate:
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* You can either use a self signed certificate, pay for a signed one or use free alternatives such as StartSSL/Comodo etc.
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* Check out this link for more providers: http://kb.mozillazine.org/Getting_an_SMIME_certificate
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* In this example I am using Comodo.
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* The form is directly available via https://secure.comodo.com/products/frontpage?area=SecureEmailCertificate
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* Fill it out and you'll get an email with a link to download your certificate.
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* Usually the certificate will be directly installed into your browser (FireFox/Chrome).
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*
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*
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* STEP 2 - Exporting the certificate
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* This is specific to your browser, however, most browsers will give you the option to export your recently added certificate in PKCS12 (.pfx)
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* Include your private key if you are asked for it.
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* Set up a password to protect your exported file.
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*
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* STEP 3 - Splitting the .pfx into a private key and the certificate.
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* I use openssl for this. You only need two commands. In my case the certificate file is called 'exported-cert.pfx'
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* To create the private key do the following:
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*
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* openssl pkcs12 -in exported-cert.pfx -nocerts -out cert.key
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*
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* Of course the way you name your file (-out) is up to you.
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* You will be asked for a password for the Import password. This is the password you just set while exporting the certificate into the pfx file.
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* Afterwards, you can password protect your private key (recommended)
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* Also make sure to set the permissions to a minimum level and suitable for your application.
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* To create the certificate file use the following command:
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*
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* openssl pkcs12 -in exported-cert.pfx -clcerts -nokeys -out cert.crt
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*
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* Again, the way you name your certificate is up to you. You will be also asked for the Import Password.
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* To create the certificate-chain file use the following command:
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*
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* openssl pkcs12 -in exported-cert.pfx -cacerts -out certchain.pem
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*
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* Again, the way you name your chain file is up to you. You will be also asked for the Import Password.
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*
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*
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* STEP 3 - Code
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*/
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require '../PHPMailerAutoload.php';
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//Create a new PHPMailer instance
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$mail = new PHPMailer();
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//Set who the message is to be sent from
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//IMPORTANT: This must match the email address of your certificate.
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//Although the certificate will be valid, an error will be thrown since it cannot be verified that the sender and the signer are the same person.
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$mail->setFrom('from@example.com', 'First Last');
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//Set an alternative reply-to address
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$mail->addReplyTo('replyto@example.com', 'First Last');
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//Set who the message is to be sent to
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$mail->addAddress('whoto@example.com', 'John Doe');
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//Set the subject line
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$mail->Subject = 'PHPMailer mail() test';
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//Read an HTML message body from an external file, convert referenced images to embedded,
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//Convert HTML into a basic plain-text alternative body
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$mail->msgHTML(file_get_contents('contents.html'), dirname(__FILE__));
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//Replace the plain text body with one created manually
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$mail->AltBody = 'This is a plain-text message body';
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//Attach an image file
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$mail->addAttachment('images/phpmailer_mini.png');
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//Configure message signing (the actual signing does not occur until sending)
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$mail->sign(
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'/path/to/cert.crt', //The location of your certificate file
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'/path/to/cert.key', //The location of your private key file
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'yourSecretPrivateKeyPassword', //The password you protected your private key with (not the Import Password! may be empty but parameter must not be omitted!)
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'/path/to/certchain.pem' //The location of your chain file
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);
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//Send the message, check for errors
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if (!$mail->send()) {
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echo "Mailer Error: " . $mail->ErrorInfo;
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} else {
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echo "Message sent!";
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}
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/**
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* REMARKS:
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* If your email client does not support S/MIME it will most likely just show an attachment smime.p7s which is the signature contained in the email.
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* Other clients, such as Thunderbird support S/MIME natively and will validate the signature automatically and report the result in some way.
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*/
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?>
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