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clang 5.0 complains:
possible misuse of comma operator here [-Wcomma]
Change the comma to a semicolon to fix that.
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... to really make sure the boundary fits in the target buffer.
Fixes unused parameter 'buflen' warning.
Reported-by: Michael Kaufmann
Bug: https://github.com/curl/curl/pull/1468#issuecomment-300078754
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When the random seed is purposely made predictable for testing purposes
by using the CURL_ENTROPY environment variable, process that data in an
endian agnostic way so the the initial random seed is the same
regardless of endianness.
- Change Curl_rand to write to a char array instead of int array.
- Add Curl_rand_hex to write random hex characters to a buffer.
Fixes #1315
Closes #1468
Co-authored-by: Daniel Stenberg
Reported-by: Michael Kaufmann
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This fixes the following clang warnings:
macro is not used [-Wunused-macros]
will never be executed [-Wunreachable-code]
Closes https://github.com/curl/curl/pull/1448
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... by removing the else branch after a return, break or continue.
Closes #1310
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Mark intended fallthroughs with /* FALLTHROUGH */ so that gcc will know
it's expected and won't warn on [-Wimplicit-fallthrough=].
Closes https://github.com/curl/curl/pull/1297
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Reported-by: shachaf@users.noreply.github.com
Fixes #1281
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... they're already frowned upon in our source code style guide, this
now enforces the rule harder.
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In order to make the code style more uniform everywhere
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Now Curl_rand() is made to fail if it cannot get the necessary random
level.
Changed the proto of Curl_rand() slightly to provide a number of ints at
once.
Moved out from vtls, since it isn't a TLS function and vtls provides
Curl_ssl_random() for this to use.
Discussion: https://curl.haxx.se/mail/lib-2016-11/0119.html
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... to make it less likely that we forget that the function actually
does case insentive compares. Also replaced several invokes of the
function with a plain strcmp when case sensitivity is not an issue (like
comparing with "-").
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The previous use of snprintf() could make libcurl silently truncate some
input data and not report that back on overly large input, which could
make data get sent over the network in a bad format.
Example:
$ curl --form 'a=b' -H "Content-Type: $(perl -e 'print "A"x4100')"
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The error path would previously add a freed entry to the linked list.
Reported-by: Toby Peterson
Fixes #1053
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curl_printf.h defines printf to curl_mprintf, etc. This can cause
problems with external headers which may use
__attribute__((format(printf, ...))) markers etc.
To avoid that they cause problems with system includes, we include
curl_printf.h after any system headers. That makes the three last
headers to always be, and we keep them in this order:
curl_printf.h
curl_memory.h
memdebug.h
None of them include system headers, they all do funny #defines.
Reported-by: David Benjamin
Fixes #743
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formdata.c:390: warning: cast from pointer to integer of different size
Introduced in commit ca5f9341ef this happens because a char*, which is
32-bits wide in 32-bit land, is being cast to a curl_off_t which is
64-bits wide where 64-bit integers are supported by the compiler.
This doesn't happen in 64-bit land as a pointer is the same size as a
curl_off_t.
This fix doesn't address the fact that a 64-bit value cannot be used
for CURLFORM_CONTENTLEN when set in a form array and compiled on a
32-bit platforms, it does at least suppress the compilation warning.
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Reported-by: Dmitry-Me
Fixes #688
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- If the size of the length type (curl_off_t) is greater than the size
of the size_t type then check before allocating memory to make sure the
value of length will fit in a size_t without overflow. If it doesn't
then return CURLE_BAD_FUNCTION_ARGUMENT.
Bug: https://github.com/bagder/curl/issues/425#issuecomment-154518679
Reported-by: Steve Holme
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Closes #425
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Fixes a name space pollution at the cost of programs using one of these
defines will no longer compile. However, the vast majority of libcurl
programs that do multipart formposts use curl_formadd() to build this
list.
Closes #506
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Closes #457
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Follow-up to e8423f9ce150 with discussionis in
https://github.com/bagder/curl/pull/258
This check scans for fopen() with a mode string without 'b' present, as
it may indicate that an FOPEN_* define should rather be used.
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This header file must be included after all header files except
memdebug.h, as it does similar memory function redefinitions and can be
similarly affected by conflicting definitions in system or dependent
library headers.
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Since we just started make use of free(NULL) in order to simplify code,
this change takes it a step further and:
- converts lots of Curl_safefree() calls to good old free()
- makes Curl_safefree() not check the pointer before free()
The (new) rule of thumb is: if you really want a function call that
frees a pointer and then assigns it to NULL, then use Curl_safefree().
But we will prefer just using free() from now on.
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The following functions return immediately if a null pointer was passed.
* Curl_cookie_cleanup
* curl_formfree
It is therefore not needed that a function caller repeats a corresponding check.
This issue was fixed by using the software Coccinelle 1.0.0-rc24.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
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The function "free" is documented in the way that no action shall occur for
a passed null pointer. It is therefore not needed that a function caller
repeats a corresponding check.
http://stackoverflow.com/questions/18775608/free-a-null-pointer-anyway-or-check-first
This issue was fixed by using the software Coccinelle 1.0.0-rc24.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
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... and as a consequence, introduce curl_printf.h with that re-define
magic instead and make all libcurl code use that instead.
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When duplicating a handle, the data to post was duplicated using
strdup() when it could be binary and contain zeroes and it was not even
zero terminated! This caused read out of bounds crashes/segfaults.
Since the lib/strdup.c file no longer is easily shared with the curl
tool with this change, it now uses its own version instead.
Bug: http://curl.haxx.se/docs/adv_20141105.html
CVE: CVE-2014-3707
Reported-By: Symeon Paraschoudis
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... for the local variable name in functions holding the return
code. Using the same name universally makes code easier to read and
follow.
Also, unify code for checking for CURLcode errors with:
if(result) or if(!result)
instead of
if(result == CURLE_OK), if(CURLE_OK == result) or if(result != CURLE_OK)
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Coverity CID 252518. This function is in general far too complicated for
its own good and really should be broken down into several smaller
funcitons instead - but I'm adding this protection here now since it
seems there's a risk the code flow can end up here and dereference a
NULL pointer.
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Not comma, which is an inconsistency and a mistake probably inherited
from the examples section of RFC1867.
This bug has been present since the day curl started to support
multipart formposts, back in the 90s.
Reported-by: Rob Davies
Bug: http://curl.haxx.se/bug/view.cgi?id=1333
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The internal function that's used to detect known file extensions for
the default Content-Type got the the wrong pointer passed in when
CURLFORM_BUFFER + CURLFORM_BUFFERPTR were used. This had the effect that
strlen() would be used which could lead to an out-of-bounds read (and
thus segfault). In most cases it would only lead to it not finding or
using the correct default content-type.
It also showed that test 554 and test 587 were testing for the
previous/wrong behavior and now they're updated as well.
Bug: http://curl.haxx.se/bug/view.cgi?id=1262
Reported-by: Konstantin Isakov
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For the standard VMS text file formats, VMS needs to read the file to
get the actual file size.
For the standard VMS binary file formats, VMS needs a special format of
fopen() call so that it stops reading at the logical end of file instead
of at the end of the blocks allocated to the file.
I structured the patch this way as I was not sure about changing the
structures or parameters to the routines, but would prefer to only call
the stat() function once and pass the information to where the fopen()
call is made.
Bug: https://sourceforge.net/p/curl/bugs/758/
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The code for CURLFORM_FILECONTENT had its check for duplicate options
wrong so that it would reject CURLFORM_PTRNAME if used in combination
with it (but not CURLFORM_COPYNAME)! The flags field used for this
purpose cannot be interpreted that broadly.
Bug: http://curl.haxx.se/mail/lib-2013-07/0258.html
Reported-by: Byrial Jensen
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When doing multi-part formposts, libcurl used a pseudo-random value that
was seeded with time(). This turns out to be bad for users who formpost
data that is provided with users who then can guess how the boundary
string will look like and then they can forge a different formpost part
and trick the receiver.
My advice to such implementors is (still even after this change) to not
rely on the boundary strings being cryptographically strong. Fix your
code and logic to not depend on them that much!
I moved the Curl_rand() function into the sslgen.c source file now to be
able to take advantage of the SSL library's random function if it
provides one. If not, try to use the RANDOM_FILE for seeding and as a
last resort keep the old logic, just modified to also add microseconds
which makes it harder to properly guess the exact seed.
The formboundary() function in formdata.c is now using 64 bit entropy
for the boundary and therefore the string of dashes was reduced by 4
letters and there are 16 hex digits following it. The total length is
thus still the same.
Bug: http://curl.haxx.se/bug/view.cgi?id=1251
Reported-by: "Floris"
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Commit f4cc54cb4746ae5a6d (shipped as part of the 7.29.0 release) was a
bug fix that introduced a regression in that while trying to avoid
allowing directory names, it also forbade "special" files like character
devices and more. like "/dev/null" as was used by Oliver who reported
this regression.
Reported by: Oliver Gondža
Bug: http://curl.haxx.se/mail/archive-2013-02/0040.html
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As Curl_FormBoundary() is no longer used outside of this file (since
commit ad7291c1a9d), it is now renamed to formboundary() and is made
static.
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- document the double-quote and backslash need be escaped if quoting.
- libcurl formdata escape double-quote in filename by backslash.
- curl formparse can parse filename both contains '"' and ',' or ';'.
- curl now can uploading file with ',' or ';' in filename.
Bug: http://curl.haxx.se/bug/view.cgi?id=1171
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Bug: http://curl.haxx.se/mail/archive-2013-01/0017.html
Reported by: Ulrich Doehner
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