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Third Party Openssl
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Third Party Openssl
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体验新版 GitCode,发现更多精彩内容 >>
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336736ef
编写于
8月 21, 2001
作者:
L
Lutz Jänicke
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Documentation on how to handle compression methods.
Hopefully it is clear enough, that it is currently not recommended.
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doc/ssl/SSL_COMP_add_compression_method.pod
doc/ssl/SSL_COMP_add_compression_method.pod
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doc/ssl/ssl.pod
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doc/ssl/SSL_COMP_add_compression_method.pod
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=pod
=head1 NAME
SSL_COMP_add_compression_method - handle SSL/TLS integrated compression methods
=head1 SYNOPSIS
#include <openssl/ssl.h>
int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm);
=head1 DESCRIPTION
SSL_COMP_add_compression_method() adds the compression method B<cm> with
the identifier B<id> to the list of available compression methods. This
list is globally maintained for all SSL operations within this application.
It cannot be set for specific SSL_CTX or SSL objects.
=head1 NOTES
The TLS standard (or SSLv3) allows the integration of compression methods
into the communication. The TLS RFC does however not specify compression
methods or their corresponding identifiers, so there is currently no compatible
way to integrate compression with unknown peers. It is therefore currently not
recommended to integrate compression into applications. Applications for
non-public use may agree on certain compression methods. Using different
compression methods with the same identifier will lead to connection failure.
An OpenSSL client speaking a protocol that allows compression (SSLv3, TLSv1)
will unconditionally send the list of all compression methods enabled with
SSL_COMP_add_compression_method() to the server during the handshake.
Unlike the mechanisms to set a cipher list, there is no method available to
restrict the list of compression method on a per connection basis.
An OpenSSL server will match the identifiers listed by a client against
its own compression methods and will unconditionally activate compression
when a matching identifier is found. There is no way to restrict the list
of compression methods supported on a per connection basis.
The OpenSSL library has the compression methods B<COMP_rle()> and (when
especially enabled during compilation) B<COMP_zlib()> available.
=head1 RETURN VALUES
SSL_COMP_add_compression_method() may return the following values:
=over 4
=item 1
The operation succeeded.
=item 0
The operation failed. Check the error queue to find out the reason.
=back
=head1 SEE ALSO
L<ssl(3)|ssl(3)>
=cut
doc/ssl/ssl.pod
浏览文件 @
336736ef
...
...
@@ -650,6 +650,7 @@ L<openssl(1)|openssl(1)>, L<crypto(3)|crypto(3)>,
L<SSL_accept(3)|SSL_accept(3)>, L<SSL_clear(3)|SSL_clear(3)>,
L<SSL_connect(3)|SSL_connect(3)>,
L<SSL_CIPHER_get_name(3)|SSL_CIPHER_get_name(3)>,
L<SSL_COMP_add_compression_method(3)|SSL_COMP_add_compression_method(3)>,
L<SSL_CTX_add_extra_chain_cert(3)|SSL_CTX_add_extra_chain_cert(3)>,
L<SSL_CTX_add_session(3)|SSL_CTX_add_session(3)>,
L<SSL_CTX_flush_sessions(3)|SSL_CTX_flush_sessions(3)>,
...
...
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