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Removed unnecessary state changes in pop3_state_starttls_resp()
following previous fix in IMAP module.
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Minor tidy up of comments and layout prior to next part of imap work.
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76 private header files renamed to use our standard naming scheme.
This change affects 322 files in libcurl's source tree.
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... it also clobbered the 'result' return value so that it wouldn't
return the error back to the parent function properly, which broke test
809 when run with 'multi-always'.
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Inclusion of top two most included header files now done in setup_once.h
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Enhanced the authentication type / mechanism detection in preparation
for the introduction of APOP support.
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Missed some comments that we identified during the SMTP tidy up earlier.
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For consistency with other SASL based functions renamed this function
to Curl_sasl_create_ntlm_type3_message() which better describes its
usage.
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Corrected lines longer than 78 characters.
Changed POP3_AUTH_FINAL to POP3_AUTH to match SMTP code now that the
AUTH command is no longer sent on its own.
Introduced some comments in data sending functions.
Another attempt at trying to rational code and comment style.
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Not all SASL enabled POP3 servers support the AUTH command on its own
when trying to detect the supported mechanisms. As such changed the
mechanism detection to use the CAPA command instead.
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Added USE_NTLM condition compilation around the NTLM functions called
from pop3_statemach_act() introduced in commit 69f7156ad96877.
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Because pop3_endofresp() is called for each line of data yet is not
passed the line and line length, so we have to use the data pointed to
by pp->linestart_resp which contains the whole packet, the mechanisms
were being detected in one call yet the function would be called for
each line of data.
Using curl with verbose mode enabled would show that one line of data
would be received in response to the AUTH command, before the AUTH
<mechanism> command was sent to the server and then the next few lines
of the original AUTH command would be displayed before the response from
the AUTH <mechanism> command. This would then cause problems when
parsing the CRAM-MD5 challenge data as extra data was contained in the
buffer.
Changed the parsing so that each line is checked for the mechanisms
and the function returns FALSE until the whole of the AUTH response has
been processed.
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Previously it wasn't possible to connect to POP3 and not specify the
user name as a CURLE_ACCESS_DENIED error would be returned. This error
occurred because USER would be sent to the server with a blank user name
if no mailbox user was specified as the server would reply with -ERR.
This wasn't a problem prior to the 7.26.0 release but with the
introduction of custom commands the user and/or application developer
might want to issue a CAPA command without having to log in as a
specific mailbox user.
Additionally this fix won't send the newly introduced AUTH command if no
user name is specified.
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Corrected lines exceeding 78 characters.
Repositioned some comments and added extra clarity.
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The POP3 protocol doesn't really have the concept of error codes and
uses +, +OK and -ERR in response to commands to indicate continue,
success and error.
The AUTH command is one of those commands that requires multiple pieces
of data to be sent to the server where the server will respond with + as
part of the handshaking. This meant changing the values before
continuing with the next stage of adding authentication support.
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Changed the order of the state machine to match the order of actual
events.
Reworked some comments and function parameter positioning that I missed
the other day.
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Added support for detecting the supported SASL authentication mechanisms
via the AUTH command. There are two ways of detecting them, either by
using the AUTH command, that will return -ERR if not supported or by
using the CAPA command which will return SASL and the list of mechanisms
if supported, not include SASL if SASL authentication is not supported
or -ERR if the CAPA command is not supported. As such it seems simpler
to use the AUTH command and fallback to normal clear text authentication
if the the command is not supported.
Additionally updated the test cases to return -ERR when the AUTH command
is encountered. Additional test cases will be added when support for the
individual authentication mechanisms is added.
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Moved EOB definition into header file.
Switched the logic around in pop3_endofresp() to allow for the
introduction of auth-mechanism detection.
Repositioned second and third function variables where they will fit
within the 78 character line limit.
Tidied up some comments.
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Reworked the command sending from two specific LIST and RETR command
functions into a single command based function as well as the two
associated response handlers into a generic command handler.
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This feature allows the user to specify and use additional POP3
commands such as UIDL and DELE via libcurl's CURLOPT_CUSTOMREQUEST or
curl's -X command line option.
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Simplified the code to remove the need for a separate "LIST <msg id>"
command handler and state machine and instead use the LIST command
handler for both operations.
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Corrected character and line spacing and re-ordered list and retr
functions based on the order of their state machines.
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Moved the server greeting response handling code from the statemach_act
functions to separate response functions. This makes the code simpler
to follow and provides consistency with the other responses that are
handled here.
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Body data would be forwarded to the client application in both the RETR
and LIST commands even if CURLOPT_NOBODY was specified.
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Curl_protocol_connect() now does the tunneling through the HTTP proxy if
requested instead of letting each protocol specific connection function
do it.
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Curl_pop3_write() would drop the final CRLF of a message as it was
considered part of the EOB as opposed to part of the message. Whilst
the EOB sequence needs to be searched for by the function only the
final 3 characters should be removed as per RFC-1939 section 3.
Reported by: Rich Gray
Bug: http://curl.haxx.se/mail/lib-2012-02/0051.html
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Protocols (IMAP, POP3 and SMTP) that use the path part of a URL in a
decoded manner now use the new Curl_urldecode() function to reject URLs
with embedded control codes (anything that is or decodes to a byte value
less than 32).
URLs containing such codes could easily otherwise be used to do harm and
allow users to do unintended actions with otherwise innocent tools and
applications. Like for example using a URL like
pop3://pop3.example.com/1%0d%0aDELE%201 when the app wants a URL to get
a mail and instead this would delete one.
This flaw is considered a security vulnerability: CVE-2012-0036
Security advisory at: http://curl.haxx.se/docs/adv_20120124.html
Reported by: Dan Fandrich
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Fixed a problem in POP3 and IMAP where a connection would fail when
CURLUSESSL_TRY was specified for a server that didn't support
SSL/TLS connections rather than continuing.
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The STARTTLS response code in SMTP, POP3 and IMAP would return
CURLE_LOGIN_DENIED rather than CURLE_USE_SSL_FAILED when SSL/TLS
was not available on the server.
Reported by: Gokhan Sengun
Bug: http://curl.haxx.se/mail/lib-2012-01/0018.html
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Changed the eob detection to work across the whole of the buffer so that
lines that begin with a dot (which the server will have escaped) are
passed to the client application correctly.
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