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a528d4f0a9
If something was "present in all versions" of SSLeay, or if it was added to a version of SSLeay (and therefore predates OpenSSL), remove mention of it. Documentation history now starts with OpenSSL. Remove mention of all history before OpenSSL 0.9.8, inclusive. Remove all AUTHOR sections. Reviewed-by: Tim Hudson <tjh@openssl.org>
61 lines
1.8 KiB
Plaintext
61 lines
1.8 KiB
Plaintext
=pod
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=head1 NAME
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SMIME_write_CMS - convert CMS structure to S/MIME format.
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=head1 SYNOPSIS
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#include <openssl/cms.h>
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int SMIME_write_CMS(BIO *out, CMS_ContentInfo *cms, BIO *data, int flags);
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=head1 DESCRIPTION
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SMIME_write_CMS() adds the appropriate MIME headers to a CMS
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structure to produce an S/MIME message.
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B<out> is the BIO to write the data to. B<cms> is the appropriate
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B<CMS_ContentInfo> structure. If streaming is enabled then the content must be
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supplied in the B<data> argument. B<flags> is an optional set of flags.
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=head1 NOTES
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The following flags can be passed in the B<flags> parameter.
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If B<CMS_DETACHED> is set then cleartext signing will be used, this option only
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makes sense for SignedData where B<CMS_DETACHED> is also set when CMS_sign() is
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called.
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If the B<CMS_TEXT> flag is set MIME headers for type B<text/plain> are added to
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the content, this only makes sense if B<CMS_DETACHED> is also set.
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If the B<CMS_STREAM> flag is set streaming is performed. This flag should only
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be set if B<CMS_STREAM> was also set in the previous call to a CMS_ContentInfo
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creation function.
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If cleartext signing is being used and B<CMS_STREAM> not set then the data must
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be read twice: once to compute the signature in CMS_sign() and once to output
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the S/MIME message.
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If streaming is performed the content is output in BER format using indefinite
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length constructed encoding except in the case of signed data with detached
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content where the content is absent and DER format is used.
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=head1 BUGS
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SMIME_write_CMS() always base64 encodes CMS structures, there should be an
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option to disable this.
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=head1 RETURN VALUES
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SMIME_write_CMS() returns 1 for success or 0 for failure.
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=head1 SEE ALSO
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L<ERR_get_error(3)>, L<CMS_sign(3)>,
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L<CMS_verify(3)>, L<CMS_encrypt(3)>
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L<CMS_decrypt(3)>
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=cut
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