Hi guys,

Sorry for troubling you with yet *another* "Failed to validate oauth
signature and token" error, but I just can't figure out what's wrong
with my request.

I'm constructing my signature from this string:

POST&http%3A%2F%2Fapi.twitter.com%2Foauth
%2Frequest_token&oauth_callback%3Dhttp%3A%2F%2Fcraiga.id.au%2Ftwitter
%2Fconnected%26oauth_consumer_key%3Dtm5...DOg%26oauth_nonce%3D8...22b
%26oauth_signature_method%3DHMAC-SHA1%26oauth_timestamp
%3D1275453048%26oauth_version%3D1.0

>From this I generate a 28 character signature using the following PHP
code:

base64_encode(hash_hmac('sha1', $raw, 'YUo...HIU' . '&', true));

Using this signature, I send the following request:

POST http://api.twitter.com/oauth/request_token HTTP/1.1
Host: api.twitter.com
Pragma: no-cache
Accept: */*
Proxy-Connection: Keep-Alive
Authorization: OAuth oauth_nonce="3D8...22b", oauth_callback="http%3A
%2F%2Fcraiga.id.au%2Ftwitter%2Fconnected",
oauth_signature_method="HMAC-SHA1", oauth_timestamp="1275453048",
oauth_consumer_key="tm5...DOg", oauth_signature="aYd...c6E%3D",
oauth_version="1.0"
Content-Length: 266
Content-Type: application/x-www-form-urlencoded

oauth_callback=http%3A%2F%2Fcraiga.id.au%2Ftwitter
%2Fconnected&oauth_consumer_key=tm5...DOg&oauth_nonce=3D8...22b&oauth_signature_method=HMAC-
SHA1&oauth_timestamp= 1275453048&oauth_version=1.0

I get the following response from Twitter to this request:

HTTP/1.1 401 Unauthorized
Date: Wed, 02 Jun 2010 04:40:14 GMT
Server: hi
Status: 401 Unauthorized
X-Transaction: 1275453614-48409-7443
Last-Modified: Wed, 02 Jun 2010 04:40:14 GMT
X-Runtime: 0.01083
Content-Type: text/html; charset=utf-8
Content-Length: 44
Pragma: no-cache
X-Revision: DEV
Expires: Tue, 31 Mar 1981 05:00:00 GMT
Cache-Control: no-cache, no-store, must-revalidate, pre-check=0, post-
check=0
Set-Cookie: k=58.161.42.101.1275453614748615; path=/; expires=Wed, 09-
Jun-10 04:40:14 GMT; domain=.twitter.com
Set-Cookie: guest_id=12754536147577949; path=/; expires=Fri, 02 Jul
2010 04:40:14 GMT
Set-Cookie:
_twitter_sess=BAh7CToPY3JlYXRlZF9hdGwrCKaq9fYoAToRdHJhbnNfcHJvbXB0MDoHaWQi
%250AJWU0ZDFhMGQzMWU0NTZjMzJiZWFkNWUzMTA4ZDRjOTg3IgpmbGFzaElDOidB
%250AY3Rpb25Db250cm9sbGVyOjpGbGFzaDo6Rmxhc2hIYXNoewAGOgpAdXNlZHsA--
f1e5c7649858a1694f24307504354846bbc1d16b; domain=.twitter.com; path=/
Vary: Accept-Encoding
Connection: close

Failed to validate oauth signature and token

If anyone can cast any light on why this might be failing, I'd love to
hear.

Thanks,
Craig

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