mirror of
https://github.com/openssl/openssl.git
synced 2024-12-15 06:01:37 +08:00
485d336137
Change find-doc-nits to complain if a section header is repeated, within a parent header (i.e., duplicate =head2 within a =head1). In almost all cases, we just remove the duplicate header, as it was a "continuation" of the =head1 that was already in affect. In some cases, just remove "=head1 NOTES", possibly moving text around, because the "NOTES" were really important parts of the DESCRIPTION section. No =headX sections should end with a period. All =head1 labels should be in all uppercase. No sub-head (=head2, etc) should be in all uppercase. Update find-doc-nits to reject the above. Fixup an internal POD link Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Paul Yang <kaishen.yy@antfin.com> Reviewed-by: Paul Dale <paul.dale@oracle.com> (Merged from https://github.com/openssl/openssl/pull/9631)
78 lines
2.6 KiB
Plaintext
78 lines
2.6 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
CMS_compress - create a CMS CompressedData structure
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/cms.h>
|
|
|
|
CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
CMS_compress() creates and returns a CMS CompressedData structure. B<comp_nid>
|
|
is the compression algorithm to use or B<NID_undef> to use the default
|
|
algorithm (zlib compression). B<in> is the content to be compressed.
|
|
B<flags> is an optional set of flags.
|
|
|
|
The only currently supported compression algorithm is zlib using the NID
|
|
NID_zlib_compression.
|
|
|
|
If zlib support is not compiled into OpenSSL then CMS_compress() will return
|
|
an error.
|
|
|
|
If the B<CMS_TEXT> flag is set MIME headers for type B<text/plain> are
|
|
prepended to the data.
|
|
|
|
Normally the supplied content is translated into MIME canonical format (as
|
|
required by the S/MIME specifications) if B<CMS_BINARY> is set no translation
|
|
occurs. This option should be used if the supplied data is in binary format
|
|
otherwise the translation will corrupt it. If B<CMS_BINARY> is set then
|
|
B<CMS_TEXT> is ignored.
|
|
|
|
If the B<CMS_STREAM> flag is set a partial B<CMS_ContentInfo> structure is
|
|
returned suitable for streaming I/O: no data is read from the BIO B<in>.
|
|
|
|
The compressed data is included in the CMS_ContentInfo structure, unless
|
|
B<CMS_DETACHED> is set in which case it is omitted. This is rarely used in
|
|
practice and is not supported by SMIME_write_CMS().
|
|
|
|
If the flag B<CMS_STREAM> is set the returned B<CMS_ContentInfo> structure is
|
|
B<not> complete and outputting its contents via a function that does not
|
|
properly finalize the B<CMS_ContentInfo> structure will give unpredictable
|
|
results.
|
|
|
|
Several functions including SMIME_write_CMS(), i2d_CMS_bio_stream(),
|
|
PEM_write_bio_CMS_stream() finalize the structure. Alternatively finalization
|
|
can be performed by obtaining the streaming ASN1 B<BIO> directly using
|
|
BIO_new_CMS().
|
|
|
|
Additional compression parameters such as the zlib compression level cannot
|
|
currently be set.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
CMS_compress() returns either a CMS_ContentInfo structure or NULL if an error
|
|
occurred. The error can be obtained from ERR_get_error(3).
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<ERR_get_error(3)>, L<CMS_uncompress(3)>
|
|
|
|
=head1 HISTORY
|
|
|
|
The B<CMS_STREAM> flag was added in OpenSSL 1.0.0.
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
|
|
|
|
Licensed under the Apache License 2.0 (the "License"). You may not use
|
|
this file except in compliance with the License. You can obtain a copy
|
|
in the file LICENSE in the source distribution or at
|
|
L<https://www.openssl.org/source/license.html>.
|
|
|
|
=cut
|