From: Wietse Venema (wietseporcupine.org)
Date: Tue Mar 06 2007 - 08:06:58 CST

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Alessio Palmero Aprosio:
> Hello to all!
>
> I am Italian, so I'm sorry for my English.
>
> I have a big big problem with Postfix and digital signatures. I need to
> sign a message from a PHP script and send it. I use the PHP function
> openssl_pkcs7_sign, that works well.
>
> Then I save the file in /tmp/signed.txt and execute the command
>
> cat /tmp/signed.txt | sendmail myemail
>
> The mail is sent but arrives with a Signature failure. This happens
> because Postfix adds some new-line (??) in the body message, and so the

Your MIME is malformed.

You must not encode message/rfc822 as quoted-printable or
base64.

The latest release has a workaround for malformed MIME messages
like yours.

        Wietse

> message is modified and the signature verifying script fails. I tried to
> do the same from another server by simply scp signed.txt and execute the
> same command cat /tmp/sig... etc. and all goes well. But that server
> uses qmail as MTA and it doesn't add any newline.
>
> How can I do? I attach the two mail received by Thunderbird from the two
> servers.
>
> Thank you
> Alessio Palmero

> Return-Path: <webmasterinchiostro.unipv.it>
> Delivered-To: HIDDEN
> Received: (qmail 9697 invoked by uid 1009); 6 Mar 2007 09:18:43 -0000
> Date: 6 Mar 2007 09:18:43 -0000
> Message-ID: <20070306091843.9696.qmailinchiostro.unipv.it>
> To: HIDDEN
> From: HIDDEN
> Subject: Prova
> MIME-Version: 1.0
> Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=sha1; boundary="----CC0249166B3A27078C2DC2410F7517FC"
>
> This is an S/MIME signed message
>
> ------CC0249166B3A27078C2DC2410F7517FC
> MIME-Version: 1.0
> Content-Type: multipart/mixed; boundary="143f3c60a50ce01f947c103ba473bdcd"
> Content-Transfer-Encoding: quoted-printable
>
> This is a multi-part message in MIME format.
>
> --143f3c60a50ce01f947c103ba473bdcd
> Content-Type: text/plain; charset="iso-8859-1"
> Content-Transfer-Encoding: quoted-printable
>
> Ciao ciao
>
> --143f3c60a50ce01f947c103ba473bdcd
> Content-Type: application/octet-stream; name="prova.tmp"
> Content-Transfer-Encoding: base64
> Content-Disposition: attachment;
>
> L3RtcC9waXBwby50eHQ=
>
>
> --143f3c60a50ce01f947c103ba473bdcd--
>
> ------CC0249166B3A27078C2DC2410F7517FC
> Content-Type: application/x-pkcs7-signature; name="smime.p7s"
> Content-Transfer-Encoding: base64
> Content-Disposition: attachment; filename="smime.p7s"
>
> MIIFaQYJKoZIhvcNAQcCoIIFWjCCBVYCAQExCzAJBgUrDgMCGgUAMAsGCSqGSIb3
> DQEHAaCCA0IwggM+MIICp6ADAgECAgIEIzANBgkqhkiG9w0BAQQFADCBjTELMAkG
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> AgIAgDANBggqhkiG9w0DAgIBQDAHBgUrDgMCBzANBggqhkiG9w0DAgIBKDANBgkq
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> BlImIkUAtW+SJUCfFoQyB9UeTD3D93xLj4TVtu3F8r5IIC0m9W05lZihQdCcvEuV
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>
> ------CC0249166B3A27078C2DC2410F7517FC--
>

> Return-Path: <webdevwebservice.ferrarigroup.net>
> Delivered-To: HIDDEN
> Received: (qmail 9989 invoked from network); 6 Mar 2007 09:27:45 -0000
> Received: from unknown (HELO webservice.ferrarigroup.net) (151.8.139.194)
> by inchiostro.unipv.it with SMTP; 6 Mar 2007 09:27:45 -0000
> Received: by webservice.ferrarigroup.net (Postfix, from userid 1004)
> id E60687A63; Tue, 6 Mar 2007 10:30:20 +0100 (CET)
> To: HIDDEN
> From: HIDDEN
> Subject: Prova
> MIME-Version: 1.0
> Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=sha1; boundary="----CC0249166B3A27078C2DC2410F7517FC"
> Message-Id: <20070306093020.E60687A63webservice.ferrarigroup.net>
> Date: Tue, 6 Mar 2007 10:30:20 +0100 (CET)
>
> This is an S/MIME signed message
>
> ------CC0249166B3A27078C2DC2410F7517FC
> MIME-Version: 1.0
> Content-Type: multipart/mixed; boundary="143f3c60a50ce01f947c103ba473bdcd"
> Content-Transfer-Encoding: quoted-printable
>
>
> This is a multi-part message in MIME format.
>
> --143f3c60a50ce01f947c103ba473bdcd
> Content-Type: text/plain; charset="iso-8859-1"
> Content-Transfer-Encoding: quoted-printable
>
>
> Ciao ciao
>
> --143f3c60a50ce01f947c103ba473bdcd
> Content-Type: application/octet-stream; name="prova.tmp"
> Content-Transfer-Encoding: base64
> Content-Disposition: attachment;
>
>
> L3RtcC9waXBwby50eHQ=
>
>
> --143f3c60a50ce01f947c103ba473bdcd--
>
> ------CC0249166B3A27078C2DC2410F7517FC
> Content-Type: application/x-pkcs7-signature; name="smime.p7s"
> Content-Transfer-Encoding: base64
> Content-Disposition: attachment; filename="smime.p7s"
>
> MIIFaQYJKoZIhvcNAQcCoIIFWjCCBVYCAQExCzAJBgUrDgMCGgUAMAsGCSqGSIb3
> DQEHAaCCA0IwggM+MIICp6ADAgECAgIEIzANBgkqhkiG9w0BAQQFADCBjTELMAkG
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>
> ------CC0249166B3A27078C2DC2410F7517FC--
>

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