S/MIME PKCS7 and the famous CRLF

[Holger Sesterhenn]

Hi,

I am playing around with PKCS7 mails and also have noticed the small gliches when dealing with multipart/mime. (yes, I have spent some time reading groups.google and the mailing list archives).

If I understand RFC2046 correctly every line ends with an CRLF. The function PKCS7_sign() fransfers the data to be signed to the "canonical form" using SMIME_crlf_copy(). Thats pretty nice. SMIME_write_PKCS7() and B64_write_PKCS7() just use BIO_printf() with a single "\n" for the EOL, especially when writing the boundary strings.

OK, thats not a real big mistake and most MTAs/MUAs do handle this releaxed but I think if we have a RFC we should stick to it.

And the other reason is that I have to use a program (for which I don't have the source code) which crashes without CRLF.

The current workaround is to copy the whole mail again with something like my_crlf_copy(). That is a little bit annoying if you deal with some hundred mails bigger than 10 MB within a few minutes...

What is you opinion?

Best Regards,

Holger Sesterhenn
http://www.utimaco.com
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