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OAuthUtil.php
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<?php
// vim: foldmethod=marker
/**
* The MIT License
*
* Copyright (c) 2007 Andy Smith
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files ( the "Software" ), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
namespace
MediaWiki\Extension\OAuth\Lib
;
use
MediaWiki\Logger\LoggerFactory
;
class
OAuthUtil
{
public
static
function
urlencode_rfc3986
(
$input
)
{
if
(
is_array
(
$input
)
)
{
return
array_map
(
array
(
self
::
class
,
'urlencode_rfc3986'
),
$input
);
}
else
{
if
(
is_scalar
(
$input
)
)
{
return
str_replace
(
'+'
,
' '
,
str_replace
(
'%7E'
,
'~'
,
rawurlencode
(
$input
)
)
);
}
else
{
return
''
;
}
}
}
// This decode function isn't taking into consideration the above
// modifications to the encoding process. However, this method doesn't
// seem to be used anywhere so leaving it as is.
public
static
function
urldecode_rfc3986
(
$string
)
{
return
urldecode
(
$string
);
}
// Utility function for turning the Authorization: header into
// parameters, has to do some unescaping
// Can filter out any non-oauth parameters if needed ( default behaviour )
// May 28th, 2010 - method updated to tjerk.meesters for a speed improvement.
// see http://code.google.com/p/oauth/issues/detail?id = 163
public
static
function
split_header
(
$header
,
$only_allow_oauth_parameters
=
true
)
{
$logger
=
LoggerFactory
::
getInstance
(
'OAuth'
);
$logger
->
debug
(
__METHOD__
.
": pulling headers from '$header'"
);
$params
=
array
();
if
(
preg_match_all
(
'/('
.
(
$only_allow_oauth_parameters
?
'oauth_'
:
''
)
.
'[a-z_-]*)=(:?"([^"]*)"|([^,]*))/'
,
$header
,
$matches
)
)
{
foreach
(
$matches
[
1
]
as
$i
=>
$h
)
{
$params
[
$h
]
=
OAuthUtil
::
urldecode_rfc3986
(
empty
(
$matches
[
3
][
$i
]
)
?
$matches
[
4
][
$i
]
:
$matches
[
3
][
$i
]
);
}
if
(
isset
(
$params
[
'realm'
]
)
)
{
unset
(
$params
[
'realm'
]
);
}
}
return
$params
;
}
// helper to try to sort out headers for people who aren't running apache
public
static
function
get_headers
()
{
if
(
function_exists
(
'apache_request_headers'
)
)
{
// we need this to get the actual Authorization: header
// because apache tends to tell us it doesn't exist
$headers
=
apache_request_headers
();
// sanitize the output of apache_request_headers because
// we always want the keys to be Cased-Like-This and arh()
// returns the headers in the same case as they are in the
// request
$out
=
array
();
foreach
(
$headers
as
$key
=>
$value
)
{
$key
=
str_replace
(
" "
,
"-"
,
ucwords
(
strtolower
(
str_replace
(
"-"
,
" "
,
$key
)
)
)
);
$out
[
$key
]
=
$value
;
}
}
else
{
// otherwise we don't have apache and are just going to have to hope
// that $_SERVER actually contains what we need
$out
=
array
();
if
(
isset
(
$_SERVER
[
'CONTENT_TYPE'
]
)
)
{
$out
[
'Content-Type'
]
=
$_SERVER
[
'CONTENT_TYPE'
];
}
if
(
isset
(
$_ENV
[
'CONTENT_TYPE'
]
)
)
{
$out
[
'Content-Type'
]
=
$_ENV
[
'CONTENT_TYPE'
];
}
foreach
(
$_SERVER
as
$key
=>
$value
)
{
if
(
substr
(
$key
,
0
,
5
)
==
"HTTP_"
)
{
// this is chaos, basically it is just there to capitalize the first
// letter of every word that is not an initial HTTP and strip HTTP
// code from przemek
$key
=
str_replace
(
" "
,
"-"
,
ucwords
(
strtolower
(
str_replace
(
"_"
,
" "
,
substr
(
$key
,
5
)
)
)
)
);
$out
[
$key
]
=
$value
;
}
}
}
return
$out
;
}
// This function takes a input like a=b&a=c&d=e and returns the parsed
// parameters like this
// array( 'a' => array( 'b','c' ), 'd' => 'e' )
public
static
function
parse_parameters
(
$input
)
{
if
(
!
isset
(
$input
)
||
!
$input
)
{
return
array
();
}
$pairs
=
explode
(
'&'
,
$input
);
$parsed_parameters
=
array
();
foreach
(
$pairs
as
$pair
)
{
$split
=
explode
(
'='
,
$pair
,
2
);
$parameter
=
OAuthUtil
::
urldecode_rfc3986
(
$split
[
0
]
);
$value
=
isset
(
$split
[
1
]
)
?
OAuthUtil
::
urldecode_rfc3986
(
$split
[
1
]
)
:
''
;
if
(
isset
(
$parsed_parameters
[
$parameter
]
)
)
{
// We have already recieved parameter( s ) with this name, so add to the list
// of parameters with this name
if
(
is_scalar
(
$parsed_parameters
[
$parameter
]
)
)
{
// This is the first duplicate, so transform scalar ( string ) into an array
// so we can add the duplicates
$parsed_parameters
[
$parameter
]
=
array
(
$parsed_parameters
[
$parameter
]
);
}
$parsed_parameters
[
$parameter
][]
=
$value
;
}
else
{
$parsed_parameters
[
$parameter
]
=
$value
;
}
}
return
$parsed_parameters
;
}
public
static
function
build_http_query
(
$params
)
{
LoggerFactory
::
getInstance
(
'OAuth'
)->
debug
(
__METHOD__
.
" called with params:
\n
"
.
print_r
(
$params
,
true
)
);
if
(
!
$params
)
{
return
''
;
}
// Urlencode both keys and values
$keys
=
OAuthUtil
::
urlencode_rfc3986
(
array_keys
(
$params
)
);
$values
=
OAuthUtil
::
urlencode_rfc3986
(
array_values
(
$params
)
);
$params
=
array_combine
(
$keys
,
$values
);
// Parameters are sorted by name, using lexicographical byte value ordering.
// Ref: Spec: 9.1.1 ( 1 )
uksort
(
$params
,
'strcmp'
);
$pairs
=
array
();
foreach
(
$params
as
$parameter
=>
$value
)
{
if
(
is_array
(
$value
)
)
{
// If two or more parameters share the same name, they are sorted by their value
// Ref: Spec: 9.1.1 ( 1 )
// June 12th, 2010 - changed to sort because of issue 164 by hidetaka
sort
(
$value
,
SORT_STRING
);
foreach
(
$value
as
$duplicate_value
)
{
$pairs
[]
=
$parameter
.
'='
.
$duplicate_value
;
}
}
else
{
$pairs
[]
=
$parameter
.
'='
.
$value
;
}
}
// For each parameter, the name is separated from the corresponding value by an ' = ' character ( ASCII code 61 )
// Each name-value pair is separated by an '&' character ( ASCII code 38 )
return
implode
(
'&'
,
$pairs
);
}
}
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