216 lines
7.5 KiB
Groff
216 lines
7.5 KiB
Groff
.\" Automatically generated by Pod::Man version 1.15
|
|
.\" Mon Jan 13 19:34:34 2003
|
|
.\"
|
|
.\" Standard preamble:
|
|
.\" ======================================================================
|
|
.de Sh \" Subsection heading
|
|
.br
|
|
.if t .Sp
|
|
.ne 5
|
|
.PP
|
|
\fB\\$1\fR
|
|
.PP
|
|
..
|
|
.de Sp \" Vertical space (when we can't use .PP)
|
|
.if t .sp .5v
|
|
.if n .sp
|
|
..
|
|
.de Ip \" List item
|
|
.br
|
|
.ie \\n(.$>=3 .ne \\$3
|
|
.el .ne 3
|
|
.IP "\\$1" \\$2
|
|
..
|
|
.de Vb \" Begin verbatim text
|
|
.ft CW
|
|
.nf
|
|
.ne \\$1
|
|
..
|
|
.de Ve \" End verbatim text
|
|
.ft R
|
|
|
|
.fi
|
|
..
|
|
.\" Set up some character translations and predefined strings. \*(-- will
|
|
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
|
|
.\" double quote, and \*(R" will give a right double quote. | will give a
|
|
.\" real vertical bar. \*(C+ will give a nicer C++. Capital omega is used
|
|
.\" to do unbreakable dashes and therefore won't be available. \*(C` and
|
|
.\" \*(C' expand to `' in nroff, nothing in troff, for use with C<>
|
|
.tr \(*W-|\(bv\*(Tr
|
|
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
|
|
.ie n \{\
|
|
. ds -- \(*W-
|
|
. ds PI pi
|
|
. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
|
|
. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
|
|
. ds L" ""
|
|
. ds R" ""
|
|
. ds C` ""
|
|
. ds C' ""
|
|
'br\}
|
|
.el\{\
|
|
. ds -- \|\(em\|
|
|
. ds PI \(*p
|
|
. ds L" ``
|
|
. ds R" ''
|
|
'br\}
|
|
.\"
|
|
.\" If the F register is turned on, we'll generate index entries on stderr
|
|
.\" for titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and
|
|
.\" index entries marked with X<> in POD. Of course, you'll have to process
|
|
.\" the output yourself in some meaningful fashion.
|
|
.if \nF \{\
|
|
. de IX
|
|
. tm Index:\\$1\t\\n%\t"\\$2"
|
|
..
|
|
. nr % 0
|
|
. rr F
|
|
.\}
|
|
.\"
|
|
.\" For nroff, turn off justification. Always turn off hyphenation; it
|
|
.\" makes way too many mistakes in technical documents.
|
|
.hy 0
|
|
.if n .na
|
|
.\"
|
|
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
|
|
.\" Fear. Run. Save yourself. No user-serviceable parts.
|
|
.bd B 3
|
|
. \" fudge factors for nroff and troff
|
|
.if n \{\
|
|
. ds #H 0
|
|
. ds #V .8m
|
|
. ds #F .3m
|
|
. ds #[ \f1
|
|
. ds #] \fP
|
|
.\}
|
|
.if t \{\
|
|
. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
|
|
. ds #V .6m
|
|
. ds #F 0
|
|
. ds #[ \&
|
|
. ds #] \&
|
|
.\}
|
|
. \" simple accents for nroff and troff
|
|
.if n \{\
|
|
. ds ' \&
|
|
. ds ` \&
|
|
. ds ^ \&
|
|
. ds , \&
|
|
. ds ~ ~
|
|
. ds /
|
|
.\}
|
|
.if t \{\
|
|
. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
|
|
. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
|
|
. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
|
|
. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
|
|
. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
|
|
. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
|
|
.\}
|
|
. \" troff and (daisy-wheel) nroff accents
|
|
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
|
|
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
|
|
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
|
|
.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
|
|
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
|
|
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
|
|
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
|
|
.ds ae a\h'-(\w'a'u*4/10)'e
|
|
.ds Ae A\h'-(\w'A'u*4/10)'E
|
|
. \" corrections for vroff
|
|
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
|
|
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
|
|
. \" for low resolution devices (crt and lpr)
|
|
.if \n(.H>23 .if \n(.V>19 \
|
|
\{\
|
|
. ds : e
|
|
. ds 8 ss
|
|
. ds o a
|
|
. ds d- d\h'-1'\(ga
|
|
. ds D- D\h'-1'\(hy
|
|
. ds th \o'bp'
|
|
. ds Th \o'LP'
|
|
. ds ae ae
|
|
. ds Ae AE
|
|
.\}
|
|
.rm #[ #] #H #V #F C
|
|
.\" ======================================================================
|
|
.\"
|
|
.IX Title "SSL_CTX_new 3"
|
|
.TH SSL_CTX_new 3 "0.9.7" "2003-01-13" "OpenSSL"
|
|
.UC
|
|
.SH "NAME"
|
|
SSL_CTX_new \- create a new \s-1SSL_CTX\s0 object as framework for \s-1TLS/SSL\s0 enabled functions
|
|
.SH "SYNOPSIS"
|
|
.IX Header "SYNOPSIS"
|
|
.Vb 1
|
|
\& #include <openssl/ssl.h>
|
|
.Ve
|
|
.Vb 1
|
|
\& SSL_CTX *SSL_CTX_new(SSL_METHOD *method);
|
|
.Ve
|
|
.SH "DESCRIPTION"
|
|
.IX Header "DESCRIPTION"
|
|
\&\fISSL_CTX_new()\fR creates a new \fB\s-1SSL_CTX\s0\fR object as framework to establish
|
|
\&\s-1TLS/SSL\s0 enabled connections.
|
|
.SH "NOTES"
|
|
.IX Header "NOTES"
|
|
The \s-1SSL_CTX\s0 object uses \fBmethod\fR as connection method. The methods exist
|
|
in a generic type (for client and server use), a server only type, and a
|
|
client only type. \fBmethod\fR can be of the following types:
|
|
.Ip "SSLv2_method(void), SSLv2_server_method(void), SSLv2_client_method(void)" 4
|
|
.IX Item "SSLv2_method(void), SSLv2_server_method(void), SSLv2_client_method(void)"
|
|
A \s-1TLS/SSL\s0 connection established with these methods will only understand
|
|
the SSLv2 protocol. A client will send out SSLv2 client hello messages
|
|
and will also indicate that it only understand SSLv2. A server will only
|
|
understand SSLv2 client hello messages.
|
|
.Ip "SSLv3_method(void), SSLv3_server_method(void), SSLv3_client_method(void)" 4
|
|
.IX Item "SSLv3_method(void), SSLv3_server_method(void), SSLv3_client_method(void)"
|
|
A \s-1TLS/SSL\s0 connection established with these methods will only understand the
|
|
SSLv3 protocol. A client will send out SSLv3 client hello messages
|
|
and will indicate that it only understands SSLv3. A server will only understand
|
|
SSLv3 client hello messages. This especially means, that it will
|
|
not understand SSLv2 client hello messages which are widely used for
|
|
compatibility reasons, see SSLv23_*\fI_method()\fR.
|
|
.Ip "TLSv1_method(void), TLSv1_server_method(void), TLSv1_client_method(void)" 4
|
|
.IX Item "TLSv1_method(void), TLSv1_server_method(void), TLSv1_client_method(void)"
|
|
A \s-1TLS/SSL\s0 connection established with these methods will only understand the
|
|
TLSv1 protocol. A client will send out TLSv1 client hello messages
|
|
and will indicate that it only understands TLSv1. A server will only understand
|
|
TLSv1 client hello messages. This especially means, that it will
|
|
not understand SSLv2 client hello messages which are widely used for
|
|
compatibility reasons, see SSLv23_*\fI_method()\fR. It will also not understand
|
|
SSLv3 client hello messages.
|
|
.Ip "SSLv23_method(void), SSLv23_server_method(void), SSLv23_client_method(void)" 4
|
|
.IX Item "SSLv23_method(void), SSLv23_server_method(void), SSLv23_client_method(void)"
|
|
A \s-1TLS/SSL\s0 connection established with these methods will understand the SSLv2,
|
|
SSLv3, and TLSv1 protocol. A client will send out SSLv2 client hello messages
|
|
and will indicate that it also understands SSLv3 and TLSv1. A server will
|
|
understand SSLv2, SSLv3, and TLSv1 client hello messages. This is the best
|
|
choice when compatibility is a concern.
|
|
.PP
|
|
The list of protocols available can later be limited using the SSL_OP_NO_SSLv2,
|
|
SSL_OP_NO_SSLv3, SSL_OP_NO_TLSv1 options of the \fB\f(BISSL_CTX_set_options()\fB\fR or
|
|
\&\fB\f(BISSL_set_options()\fB\fR functions. Using these options it is possible to choose
|
|
e.g. \fISSLv23_server_method()\fR and be able to negotiate with all possible
|
|
clients, but to only allow newer protocols like SSLv3 or TLSv1.
|
|
.PP
|
|
\&\fISSL_CTX_new()\fR initializes the list of ciphers, the session cache setting,
|
|
the callbacks, the keys and certificates, and the options to its default
|
|
values.
|
|
.SH "RETURN VALUES"
|
|
.IX Header "RETURN VALUES"
|
|
The following return values can occur:
|
|
.Ip "\s-1NULL\s0" 4
|
|
.IX Item "NULL"
|
|
The creation of a new \s-1SSL_CTX\s0 object failed. Check the error stack to
|
|
find out the reason.
|
|
.Ip "Pointer to an \s-1SSL_CTX\s0 object" 4
|
|
.IX Item "Pointer to an SSL_CTX object"
|
|
The return value points to an allocated \s-1SSL_CTX\s0 object.
|
|
.SH "SEE ALSO"
|
|
.IX Header "SEE ALSO"
|
|
SSL_CTX_free(3), SSL_accept(3),
|
|
ssl(3), SSL_set_connect_state(3)
|