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141 Commits

Author SHA1 Message Date
Gilles Peskine
f1a8eeb0a6 mbedtls_mpi_write_binary: don't leak the exact size of the number 
In mbedtls_mpi_write_binary, avoid leaking the size of the number
through timing or branches, if possible. More precisely, if the number
fits in the output buffer based on its allocated size, the new code's
trace doesn't depend on the value of the number.
 2018-11-26 12:51:34 +01:00
Gilles Peskine
8c1217984b Merge remote-tracking branch 'upstream-restricted/pr/360' into mbedtls-2.1-restricted-proposed 
Conflicts:
* scripts/config.pl: reconciled parallel edits in a comment.
 2018-03-13 17:26:49 +01:00
Hanno Becker
a82f89181c Verify result of RSA private key operation 2017-11-06 15:08:27 +00:00
Hanno Becker
0f49bbc1fc Zeroize stack before returning from mpi_fill_random 2017-10-25 15:46:29 +01:00
Hanno Becker
7d80688e53 Make mpi_read_binary time constant 
This commit modifies mpi_read_binary to always allocate the minimum number of
limbs required to hold the entire buffer provided to the function, regardless of
its content. Previously, leading zero bytes in the input data were detected and
used to reduce memory footprint and time, but this non-constant behavior turned
out to be non-tolerable for the cryptographic applications this function is used
for.
 2017-10-25 15:44:10 +01:00
Manuel Pégourié-Gonnard
640edc7810 Merge remote-tracking branch 'hanno/mpi_read_file_underflow_backport-2.1' into mbedtls-2.1 
* hanno/mpi_read_file_underflow_backport-2.1:
  Fix potential stack underflow in mpi_read_file.
 2017-06-08 19:51:19 +02:00
Hanno Becker
4195e80649 Fix potential stack underflow in mpi_read_file. 
When provided with an empty line, mpi_read_file causes a numeric
underflow resulting in a stack underflow. This commit fixes this and
adds some documentation to mpi_read_file.
 2017-05-12 07:21:37 +01:00
Hanno Becker
2938ccbdd8 Abort modular inversion when modulus is one. 
The modular inversion function hangs when provided with the modulus 1. This commit refuses this modulus with a BAD_INPUT error code. It also adds a test for this case.
 2017-05-11 11:23:48 +01:00
Hanno Becker
2a8d655664 Correct sign in modular exponentiation algorithm. 
The modular exponentiation function  handled the sign incorrectly. This commit fixes this and a test case which should have caught it.
 2017-05-11 11:23:48 +01:00
Andres AG
e0545c30dd Fix buffer overflow in mbedtls_mpi_write_string() 
Fix a buffer overflow when writting a string representation of an MPI
number to a buffer in hexadecimal. The problem occurs because hex
digits are written in pairs and this is not accounted for in the
calculation of the required buffer size when the number of digits is
odd.
 2017-03-02 22:58:05 +00:00
Janos Follath
79a1da6948 Improved on the previous fix and added a test case to cover both types 
of carries.
 2016-01-08 14:48:01 +01:00
Janos Follath
a65477d885 Removed recursion from fix #309. 2016-01-08 14:48:00 +01:00
Janos Follath
5429c0a7d0 Improved on the fix of #309 and extended the test to cover subroutines. 2016-01-08 14:48:00 +01:00
Janos Follath
d0e0c03520 Tests and fix added for #309 (inplace mpi doubling). 2016-01-08 14:47:16 +01:00
Simon Butcher
6189175900 Fix for MPI divide on MSVC 
Resolves multiple platform issues when building bignum.c with Microsoft
Visual Studio.
 2016-01-03 20:32:46 +00:00
Simon Butcher
7ebe2781fe Fix for compiler warnings and style 
Changes for C90 compliance, and style following review
 2015-12-28 00:05:30 +00:00
Manuel Pégourié-Gonnard
5a8396ed55 Fix two more compiler warnings 
- declaration after statement
- always true comparison due to limited range of operand
 2015-12-03 19:09:23 +01:00
Manuel Pégourié-Gonnard
3eab29adc8 Fix potential integer overflow in prev. commit 
Found by Clang's -Wshift-count-overflow
 2015-12-03 19:09:21 +01:00
Simon Butcher
ea303e3ece Added integer divide by as separate function 
Added 64bit integer divided by 32bit integer, with remainder
 2015-11-26 23:43:34 +00:00
Simon Butcher
60d41b5d87 Corrected URL/reference to MPI library 2015-10-27 10:28:11 +01:00
Manuel Pégourié-Gonnard
2d7083435d Fix references to non-standard SIZE_T_MAX 
Turns out C99 doesn't define SIZE_T_MAX, so let's not use it.
 2015-10-05 15:23:11 +01:00
Manuel Pégourié-Gonnard
58fb49531d Fix potential buffer overflow in mpi_read_string() 
Found by Guido Vranken.

Two possible integer overflows (during << 2 or addition in BITS_TO_LIMB())
could result in far too few memory to be allocated, then overflowing the
buffer in the subsequent for loop.

Both integer overflows happen when slen is close to or greater than
SIZE_T_MAX >> 2 (ie 2^30 on a 32 bit system).

Note: one could also avoid those overflows by changing BITS_TO_LIMB(s << 2) to
CHARS_TO_LIMB(s >> 1) but the solution implemented looks more robust with
respect to future code changes.
 2015-09-28 15:59:54 +02:00
Manuel Pégourié-Gonnard
37ff14062e Change main license to Apache 2.0 2015-09-04 14:21:07 +02:00
Manuel Pégourié-Gonnard
6fb8187279 Update date in copyright line 2015-07-28 17:11:58 +02:00
Manuel Pégourié-Gonnard
c0696c216b Rename mbedtls_mpi_msb to mbedtls_mpi_bitlen 2015-06-18 16:49:37 +02:00
Manuel Pégourié-Gonnard
f79b425226 Avoid in-out length parameter in bignum 2015-06-02 15:41:48 +01:00
Manuel Pégourié-Gonnard
6a8ca33fa5 Rename ERR_xxx_MALLOC_FAILED to ..._ALLOC_FAILED 2015-05-28 16:25:05 +02:00
Manuel Pégourié-Gonnard
7551cb9ee9 Replace malloc with calloc 
- platform layer currently broken (not adapted yet)
- memmory_buffer_alloc too
 2015-05-26 16:04:06 +02:00
Manuel Pégourié-Gonnard
da61ed3346 Merge branch 'mbedtls-1.3' into development 
* mbedtls-1.3:
  Include changes from the 1.2 branch
  Remove unused headers in o_p_test
  Add countermeasure against cache-based lucky 13
  Make results of (ext)KeyUsage accessible
  Fix missing NULL check in MPI
  Fix detection of getrandom()
  Fix "make install" handling of symlinks
  Fix bugs in programs displaying verify flags

Conflicts:
	Makefile
	include/polarssl/ssl.h
	library/entropy_poll.c
	library/ssl_srv.c
	library/ssl_tls.c
	programs/test/o_p_test.c
	programs/test/ssl_cert_test.c
	programs/x509/cert_app.c
 2015-04-30 10:38:44 +02:00
Manuel Pégourié-Gonnard
770b5e1e9e Fix missing NULL check in MPI 2015-04-29 17:02:01 +02:00
Manuel Pégourié-Gonnard
53c76c07de Merge branch 'mbedtls-1.3' into development 
* commit 'ce60fbe':
  Fix potential timing difference with RSA PMS
  Update Changelog for recent merge
  Added more constant-time code and removed biases in the prime number generation routines.

Conflicts:
	library/bignum.c
	library/ssl_srv.c
 2015-04-17 20:19:32 +02:00
Manuel Pégourié-Gonnard
aac657a1d3 Merge remote-tracking branch 'pj/development' into mbedtls-1.3 
* pj/development:
  Added more constant-time code and removed biases in the prime number generation routines.
 2015-04-15 14:12:59 +02:00
Manuel Pégourié-Gonnard
2cf5a7c98e The Great Renaming 
A simple execution of tmp/invoke-rename.pl
 2015-04-08 13:25:31 +02:00
Manuel Pégourié-Gonnard
fa8aebcbcc Fix a constness issue 2015-03-19 13:38:17 +00:00
Manuel Pégourié-Gonnard
35f1d7f0aa Update signature of mpi_mul_mpi() 2015-03-19 12:42:40 +00:00
Pascal Junod
b99183dfc6 Added more constant-time code and removed biases in the prime number generation routines. 2015-03-11 16:49:45 +01:00
Manuel Pégourié-Gonnard
7f8099773e Rename include directory to mbedtls 2015-03-10 11:23:56 +00:00
Manuel Pégourié-Gonnard
fe44643b0e Rename website and repository 2015-03-06 13:17:10 +00:00
Mansour Moufid
c531b4af3c Apply the semantic patch rm-malloc-cast.cocci. 
for dir in library programs; do
        spatch --sp-file scripts/rm-malloc-cast.cocci --dir $dir \
        --in-place;
    done
 2015-02-16 10:43:52 +00:00
Manuel Pégourié-Gonnard
d72704b0d5 Remove work-around for alleged compiler bug 
It turns out the problem was with the way the reporter was invoking its
toolchain, not the toolchain itself.
 2015-02-12 09:38:54 +00:00
Rich Evans
00ab47026b cleanup library and some basic tests. Includes, add guards to includes 2015-02-10 11:28:46 +00:00
Manuel Pégourié-Gonnard
860b51642d Fix url again 2015-01-28 17:12:07 +00:00
Manuel Pégourié-Gonnard
085ab040aa Fix website url to use https. 2015-01-23 11:06:27 +00:00
Manuel Pégourié-Gonnard
9698f5852c Remove maintainer line. 2015-01-23 10:59:00 +00:00
Manuel Pégourié-Gonnard
19f6b5dfaa Remove redundant "all rights reserved" 2015-01-23 10:54:00 +00:00
Manuel Pégourié-Gonnard
a658a4051b Update copyright 2015-01-23 09:55:24 +00:00
Manuel Pégourié-Gonnard
967a2a5f8c Change name to mbed TLS in the copyright notice 2015-01-22 14:28:16 +00:00
Manuel Pégourié-Gonnard
7f4ed67a97 Fix compile error with armcc in mpi_is_prime() 2014-10-15 22:06:46 +02:00
Paul Bakker
6c343d7d9a Fix mpi_write_string() to write "00" as hex output for empty MPI 2014-07-10 15:27:10 +02:00
Paul Bakker
66d5d076f7 Fix formatting in various code to match spacing from coding style 2014-06-17 17:06:47 +02:00