SMIME_read_CMS man page on Gentoo

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SMIME_read_CMS(3)		    OpenSSL		     SMIME_read_CMS(3)

NAME
	SMIME_read_CMS - parse S/MIME message.

SYNOPSIS
	#include <openssl/cms.h>

	CMS_ContentInfo *SMIME_read_CMS(BIO *in, BIO **bcont);

DESCRIPTION
       SMIME_read_CMS() parses a message in S/MIME format.

       in is a BIO to read the message from.

       If cleartext signing is used then the content is saved in a memory bio
       which is written to *bcont, otherwise *bcont is set to NULL.

       The parsed CMS_ContentInfo structure is returned or NULL if an error
       occurred.

NOTES
       If *bcont is not NULL then the message is clear text signed. *bcont can
       then be passed to CMS_verify() with the CMS_DETACHED flag set.

       Otherwise the type of the returned structure can be determined using
       CMS_get0_type().

       To support future functionality if bcont is not NULL *bcont should be
       initialized to NULL. For example:

	BIO *cont = NULL;
	CMS_ContentInfo *cms;

	cms = SMIME_read_CMS(in, &cont);

BUGS
       The MIME parser used by SMIME_read_CMS() is somewhat primitive.	While
       it will handle most S/MIME messages more complex compound formats may
       not work.

       The parser assumes that the CMS_ContentInfo structure is always base64
       encoded and will not handle the case where it is in binary format or
       uses quoted printable format.

       The use of a memory BIO to hold the signed content limits the size of
       message which can be processed due to memory restraints: a streaming
       single pass option should be available.

RETURN VALUES
       SMIME_read_CMS() returns a valid CMS_ContentInfo structure or NULL if
       an error occurred. The error can be obtained from ERR_get_error(3).

SEE ALSO
       ERR_get_error(3), CMS_type(3) SMIME_read_CMS(3), CMS_sign(3),
       CMS_verify(3), CMS_encrypt(3) CMS_decrypt(3)

HISTORY
       SMIME_read_CMS() was added to OpenSSL 0.9.8

1.0.1g				  2014-03-17		     SMIME_read_CMS(3)
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