> From: openssl-users [mailto:openssl-users-boun...@openssl.org] On Behalf
> Of e...@coderhacks.com
> Sent: Wednesday, March 14, 2018 02:33
> To: openssl-users@openssl.org
> Subject: Re: [openssl-users] MIME-canonicalization
> 
> I think I found the reason for the problem.
> 
> SMIME_read_CMS does convert any single LF to a CRLF.

Have you verified that the file actually contains bare LFs, and not CRLFs?

If you're running on Windows, beware the CRLF conversions done by the C 
library. For example, if you write a file using a file BIO that was created 
using a FILE* from a text-mode fopen, that file will have LFs converted to CRLF 
on output. You need to open the file in binary mode, or call _setmode on the 
FILE* before writing to it.

SMIME_read_CMS just calls SMIME_read_ASN1, which ultimately does a bunch of 
BIO_gets, which calls the gets method on the BIO object. A file BIO's gets 
method just calls fgets. So if there's translation happening, it would appear 
to be in the C runtime.

-- 
Michael Wojcik 
Distinguished Engineer, Micro Focus 


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