Update per latest manual pages after running 'man-update'.
[dragonfly.git] / secure / lib / libssl / man / SSL_COMP_add_compression_method.3
CommitLineData
a7d27d5a
JR
1.rn '' }`
2''' $RCSfile$$Revision$$Date$
3'''
4''' $Log$
5'''
6.de Sh
984263bc
MD
7.br
8.if t .Sp
9.ne 5
10.PP
11\fB\\$1\fR
12.PP
13..
a7d27d5a 14.de Sp
984263bc
MD
15.if t .sp .5v
16.if n .sp
17..
a7d27d5a 18.de Ip
984263bc
MD
19.br
20.ie \\n(.$>=3 .ne \\$3
21.el .ne 3
22.IP "\\$1" \\$2
23..
a7d27d5a 24.de Vb
984263bc
MD
25.ft CW
26.nf
27.ne \\$1
28..
a7d27d5a 29.de Ve
984263bc
MD
30.ft R
31
32.fi
33..
a7d27d5a
JR
34'''
35'''
36''' Set up \*(-- to give an unbreakable dash;
37''' string Tr holds user defined translation string.
38''' Bell System Logo is used as a dummy character.
39'''
984263bc 40.tr \(*W-|\(bv\*(Tr
984263bc 41.ie n \{\
a7d27d5a
JR
42.ds -- \(*W-
43.ds PI pi
44.if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
45.if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
46.ds L" ""
47.ds R" ""
48''' \*(M", \*(S", \*(N" and \*(T" are the equivalent of
49''' \*(L" and \*(R", except that they are used on ".xx" lines,
50''' such as .IP and .SH, which do another additional levels of
51''' double-quote interpretation
52.ds M" """
53.ds S" """
54.ds N" """""
55.ds T" """""
56.ds L' '
57.ds R' '
58.ds M' '
59.ds S' '
60.ds N' '
61.ds T' '
984263bc
MD
62'br\}
63.el\{\
a7d27d5a
JR
64.ds -- \(em\|
65.tr \*(Tr
66.ds L" ``
67.ds R" ''
68.ds M" ``
69.ds S" ''
70.ds N" ``
71.ds T" ''
72.ds L' `
73.ds R' '
74.ds M' `
75.ds S' '
76.ds N' `
77.ds T' '
78.ds PI \(*p
984263bc 79'br\}
a7d27d5a
JR
80.\" If the F register is turned on, we'll generate
81.\" index entries out stderr for the following things:
82.\" TH Title
83.\" SH Header
84.\" Sh Subsection
85.\" Ip Item
86.\" X<> Xref (embedded
87.\" Of course, you have to process the output yourself
88.\" in some meaninful fashion.
89.if \nF \{
90.de IX
91.tm Index:\\$1\t\\n%\t"\\$2"
984263bc 92..
a7d27d5a
JR
93.nr % 0
94.rr F
984263bc 95.\}
a7d27d5a
JR
96.TH SSL_COMP_add_compression_method 3 "0.9.7d" "2/Sep/2004" "OpenSSL"
97.UC
98.if n .hy 0
984263bc 99.if n .na
a7d27d5a
JR
100.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
101.de CQ \" put $1 in typewriter font
102.ft CW
103'if n "\c
104'if t \\&\\$1\c
105'if n \\&\\$1\c
106'if n \&"
107\\&\\$2 \\$3 \\$4 \\$5 \\$6 \\$7
108'.ft R
109..
110.\" @(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2
111. \" AM - accent mark definitions
984263bc 112.bd B 3
a7d27d5a 113. \" fudge factors for nroff and troff
984263bc 114.if n \{\
a7d27d5a
JR
115. ds #H 0
116. ds #V .8m
117. ds #F .3m
118. ds #[ \f1
119. ds #] \fP
984263bc
MD
120.\}
121.if t \{\
a7d27d5a
JR
122. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
123. ds #V .6m
124. ds #F 0
125. ds #[ \&
126. ds #] \&
984263bc 127.\}
a7d27d5a 128. \" simple accents for nroff and troff
984263bc 129.if n \{\
a7d27d5a
JR
130. ds ' \&
131. ds ` \&
132. ds ^ \&
133. ds , \&
134. ds ~ ~
135. ds ? ?
136. ds ! !
137. ds /
138. ds q
984263bc
MD
139.\}
140.if t \{\
a7d27d5a
JR
141. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
142. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
143. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
144. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
145. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
146. ds ? \s-2c\h'-\w'c'u*7/10'\u\h'\*(#H'\zi\d\s+2\h'\w'c'u*8/10'
147. ds ! \s-2\(or\s+2\h'-\w'\(or'u'\v'-.8m'.\v'.8m'
148. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
149. ds q o\h'-\w'o'u*8/10'\s-4\v'.4m'\z\(*i\v'-.4m'\s+4\h'\w'o'u*8/10'
984263bc 150.\}
a7d27d5a 151. \" troff and (daisy-wheel) nroff accents
984263bc
MD
152.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
153.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
a7d27d5a
JR
154.ds v \\k:\h'-(\\n(.wu*9/10-\*(#H)'\v'-\*(#V'\*(#[\s-4v\s0\v'\*(#V'\h'|\\n:u'\*(#]
155.ds _ \\k:\h'-(\\n(.wu*9/10-\*(#H+(\*(#F*2/3))'\v'-.4m'\z\(hy\v'.4m'\h'|\\n:u'
156.ds . \\k:\h'-(\\n(.wu*8/10)'\v'\*(#V*4/10'\z.\v'-\*(#V*4/10'\h'|\\n:u'
157.ds 3 \*(#[\v'.2m'\s-2\&3\s0\v'-.2m'\*(#]
984263bc
MD
158.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
159.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
160.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
161.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
162.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
163.ds ae a\h'-(\w'a'u*4/10)'e
164.ds Ae A\h'-(\w'A'u*4/10)'E
a7d27d5a
JR
165.ds oe o\h'-(\w'o'u*4/10)'e
166.ds Oe O\h'-(\w'O'u*4/10)'E
167. \" corrections for vroff
984263bc
MD
168.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
169.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
a7d27d5a 170. \" for low resolution devices (crt and lpr)
984263bc
MD
171.if \n(.H>23 .if \n(.V>19 \
172\{\
a7d27d5a
JR
173. ds : e
174. ds 8 ss
175. ds v \h'-1'\o'\(aa\(ga'
176. ds _ \h'-1'^
177. ds . \h'-1'.
178. ds 3 3
179. ds o a
180. ds d- d\h'-1'\(ga
181. ds D- D\h'-1'\(hy
182. ds th \o'bp'
183. ds Th \o'LP'
184. ds ae ae
185. ds Ae AE
186. ds oe oe
187. ds Oe OE
984263bc
MD
188.\}
189.rm #[ #] #H #V #F C
984263bc 190.SH "NAME"
a7d27d5a 191SSL_COMP_add_compression_method \- handle SSL/TLS integrated compression methods
984263bc 192.SH "SYNOPSIS"
a7d27d5a 193.PP
984263bc
MD
194.Vb 1
195\& #include <openssl/ssl.h>
196.Ve
197.Vb 1
198\& int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm);
199.Ve
200.SH "DESCRIPTION"
a7d27d5a 201\fISSL_COMP_add_compression_method()\fR adds the compression method \fBcm\fR with
984263bc 202the identifier \fBid\fR to the list of available compression methods. This
a7d27d5a
JR
203list is globally maintained for all SSL operations within this application.
204It cannot be set for specific SSL_CTX or SSL objects.
984263bc 205.SH "NOTES"
a7d27d5a
JR
206The TLS standard (or SSLv3) allows the integration of compression methods
207into the communication. The TLS RFC does however not specify compression
984263bc
MD
208methods or their corresponding identifiers, so there is currently no compatible
209way to integrate compression with unknown peers. It is therefore currently not
210recommended to integrate compression into applications. Applications for
211non-public use may agree on certain compression methods. Using different
212compression methods with the same identifier will lead to connection failure.
213.PP
214An OpenSSL client speaking a protocol that allows compression (SSLv3, TLSv1)
215will unconditionally send the list of all compression methods enabled with
a7d27d5a 216\fISSL_COMP_add_compression_method()\fR to the server during the handshake.
984263bc
MD
217Unlike the mechanisms to set a cipher list, there is no method available to
218restrict the list of compression method on a per connection basis.
219.PP
220An OpenSSL server will match the identifiers listed by a client against
221its own compression methods and will unconditionally activate compression
222when a matching identifier is found. There is no way to restrict the list
223of compression methods supported on a per connection basis.
224.PP
a7d27d5a
JR
225The OpenSSL library has the compression methods \fBCOMP_rle()\fR and (when
226especially enabled during compilation) \fBCOMP_zlib()\fR available.
984263bc 227.SH "WARNINGS"
a7d27d5a
JR
228Once the identities of the compression methods for the TLS protocol have
229been standardized, the compression API will most likely be changed. Using
984263bc
MD
230it in the current state is not recommended.
231.SH "RETURN VALUES"
a7d27d5a 232\fISSL_COMP_add_compression_method()\fR may return the following values:
984263bc 233.Ip "0" 4
a7d27d5a
JR
234The operation succeeded.
235.Ip "1" 4
984263bc
MD
236The operation failed. Check the error queue to find out the reason.
237.SH "SEE ALSO"
984263bc 238ssl(3)
a7d27d5a
JR
239
240.rn }` ''
241.IX Title "SSL_COMP_add_compression_method 3"
242.IX Name "SSL_COMP_add_compression_method - handle SSL/TLS integrated compression methods"
243
244.IX Header "NAME"
245
246.IX Header "SYNOPSIS"
247
248.IX Header "DESCRIPTION"
249
250.IX Header "NOTES"
251
252.IX Header "WARNINGS"
253
254.IX Header "RETURN VALUES"
255
256.IX Item "0"
257
258.IX Item "1"
259
260.IX Header "SEE ALSO"
261