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422 Commits

Author SHA1 Message Date
Dave Rodgman
b69239c604 Improve docs in mbedtls_mpi_lt_mpi_ct 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-08-29 09:42:14 +01:00
Tom Cosgrove
3d2d599d3e Merge pull request #7996 from gilles-peskine-arm/small_primes-gaps 
Reduce the size of the small primes table used by primality testing
 2023-08-22 12:48:56 +00:00
Gilles Peskine
30b0378008 Fix off-by-one error 
The value of p after adding the last entry in the gap table is not used.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2023-08-22 11:06:47 +02:00
Tom Cosgrove
31b2d7414d Merge pull request #8053 from gilles-peskine-arm/mpi_exp_mod-remove_initial_copy 
mbedtls_mpi_exp_mod: remove spurious copy of the output variable
 2023-08-21 15:50:28 +00:00
Tom Cosgrove
d29648026b Merge pull request #8017 from ivq/unchecked_return 
Fix a few unchecked return values
 2023-08-21 13:02:53 +00:00
Chien Wong
2e3858f5eb Undo a change 
Signed-off-by: Chien Wong <m@xv97.com>
 2023-08-11 18:16:06 +08:00
Manuel Pégourié-Gonnard
54da1a69a2 Merge pull request #7578 from daverodgman/safer-ct5 
Improve constant-time interface
 2023-08-10 16:57:39 +00:00
Gilles Peskine
e6cb45e68e mbedtls_mpi_exp_mod: remove spurious copy of the output variable 
Clear some confusion between `X` as the output variable and "X" as a name
given to the accumulator. Previous iterations of the code used the variable
`X` as the accumulator, but now that the accumulator is `W[x_index]`, some
of the comments didn't make sense.

Remove the copy of the initial value of `X` into `W[x_index]`, which was
meaningless: the initial value of an output variable should not, and did
not, matter. `W[x_index]` is later overridden unconditionally to take the
value `RR`.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2023-08-10 15:59:28 +02:00
Dave Rodgman
98ddc01a7c Rename ...if0 to ...else_0 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-08-10 12:11:31 +01:00
Dave Rodgman
b7825ceb3e Rename uint->bool operators to reflect input types 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-08-10 11:58:18 +01:00
Gilles Peskine
b2bc1712a5 Reduce the size of the small primes table used by primality testing 
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2023-08-10 12:16:02 +02:00
Dave Rodgman
960eca997d code style 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-08-09 20:43:18 +01:00
Dave Rodgman
ebcd78561c Remove redundant code in mbedtls_mpi_cmp_abs 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-08-09 18:57:22 +01:00
Dave Rodgman
fa703e38a2 Use __builtin_ctz to count trailing zeros 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-08-09 18:56:07 +01:00
Dave Rodgman
f3df105b37 Generate smaller code for picking a sign value 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-08-09 18:55:41 +01:00
Dave Rodgman
c98f8d996a Merge branch 'development' into safer-ct5 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-08-07 11:47:35 +01:00
Dave Rodgman
1d4d944e19 Merge pull request #7933 from tom-cosgrove-arm/add-mbedtls_zeroize_and_free 
Provide and use internal function mbedtls_zeroize_and_free()
 2023-08-03 12:56:21 +00:00
Chien Wong
e2caf4161b Fix a few unchecked value issue 
Signed-off-by: Chien Wong <m@xv97.com>
 2023-08-01 22:41:17 +08:00
Dave Rodgman
1f39f037bf Improve variable name in mbedtls_mpi_lt_mpi_ct 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-08-01 09:19:16 +01:00
Dave Rodgman
32d726033b Improve comments in mbedtls_mpi_lt_mpi_ct 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-07-31 12:43:23 +01:00
Tom Cosgrove
bc345e8685 Protect macro parameter expansion with parentheses 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2023-07-25 15:17:39 +01:00
Tom Cosgrove
350226f636 Use a macro for mbedtls_mpi_zeroize_and_free() 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2023-07-25 15:10:14 +01:00
Dave Rodgman
8e8e6b9be3 Merge pull request #7934 from AgathiyanB/move-declarations-to-top 
Move declarations to top of functions
 2023-07-19 15:25:27 +01:00
Tom Cosgrove
46259f670f Internal function mbedtls_mpi_zeroize() can be mbedtls_mpi_zeroize_and_free() 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2023-07-18 16:44:14 +01:00
Agathiyan Bragadeesh
c99840ae1f Move declarations in mbedtls_mpi_add_abs to top 
Signed-off-by: Agathiyan Bragadeesh <agathiyan.bragadeesh2@arm.com>
 2023-07-17 12:21:06 +01:00
Gilles Peskine
053022fe24 Reduce the size of mbedtls_mpi 
Reduce the size of mbedtls_mpi from 3 words to 2 on most architectures.

This also reduces the code size significantly in bignum.o and ecp_curves.o,
with negligible variations in other modules.

This removes the ability to set MBEDTLS_MPI_MAX_LIMBS to a value >=65536,
but we don't support customizing this value anyway (it's always 10000).

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2023-06-29 19:33:44 +02:00
Dave Rodgman
2c76484005 Fix non-opaque use of mbedtls_ct_condition_t 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-05-26 12:42:48 +01:00
Dave Rodgman
2b4486a014 Rename mbedtls_ct_uint_if_new to mbedtls_ct_uint_if 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-05-26 12:42:48 +01:00
Dave Rodgman
cf06acac32 Use new CT interface in mbedtls_mpi_safe_cond_swap 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-05-26 12:42:48 +01:00
Dave Rodgman
ee54faf1cd Update mpi_select to use new CT interface 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-05-26 12:42:48 +01:00
Dave Rodgman
1a7a5626ec Update mbedtls_mpi_lt_mpi_ct to new interface 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-05-26 12:42:48 +01:00
Dave Rodgman
589ccb8aaa Update mbedtls_mpi_safe_cond_(assign|swap) part 2 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-05-26 12:42:48 +01:00
Dave Rodgman
cd2e38b906 Update mbedtls_mpi_safe_cond_(assign|swap) to use new CT interface 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-05-26 12:42:48 +01:00
Dave Rodgman
7d4f019810 Move some bignum functions out of constant_time module 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-05-26 12:42:48 +01:00
Dave Rodgman
68ef1d6ee6 Remove DIY SIZE_MAX definitions 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-05-18 20:49:03 +01:00
Minos Galanakis
0144b35f7d bignum: Updated mbedtls_mpi_shift_l to use the core method. 
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
 2023-05-16 17:16:26 +01:00
Tom Cosgrove
6af26f3838 Tidy up, remove MPI_CORE(), apply the naming convention, and use the new mbedtls_mpi_core_mul() 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
 2023-03-31 16:16:00 +02:00
Paul Elliott
1748de160a Fix IAR Warnings 
IAR was warning that conditional execution could bypass initialisation of
variables, although those same variables were not used uninitialised.

Signed-off-by: Paul Elliott <paul.elliott@arm.com>
 2023-02-13 15:35:35 +00:00
Aaron M. Ucko
af67d2c1cf mbedtls_mpi_sub_abs: Skip memcpy when redundant (#6701). 
In some contexts, the output pointer may equal the first input
pointer, in which case copying is not only superfluous but results in
"Source and destination overlap in memcpy" errors from Valgrind (as I
observed in the context of ecp_double_jac) and a diagnostic message
from TrustInSoft Analyzer (as Pascal Cuoq reported in the context of
other ECP functions called by cert-app with a suitable certificate).

Signed-off-by: Aaron M. Ucko <ucko@ncbi.nlm.nih.gov>
 2023-01-17 11:52:22 -05:00
Gilles Peskine
449bd8303e Switch to the new code style 
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2023-01-11 14:50:10 +01:00
Glenn Strauss
14db51224e Fix IAR warning 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-01-06 14:20:14 +00:00
Manuel Pégourié-Gonnard
5bf8629b2c Merge pull request #6303 from gilles-peskine-arm/bignum-core-random 
Bignum: Implement mbedtls_mpi_core_random
 2022-12-16 09:58:07 +01:00
Gilles Peskine
6b7ce968d2 Clarify some comments 
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2022-12-15 15:04:33 +01:00
Dave Rodgman
acbb6dc364 Merge remote-tracking branch 'origin/development' into merge-dev 2022-12-05 10:59:23 +00:00
Gilles Peskine
70375b2028 Move mbedtls_mpi_core_random to the proper source file 
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2022-12-01 23:46:26 +01:00
Gilles Peskine
78cf3bbf22 Bignum core: break mbedtls_mpi_core_random out of mbedtls_mpi_random 
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2022-12-01 23:45:45 +01:00
Gilles Peskine
26be89b3f6 Bignum core: random: prepare to break out the core function 
Shuffle things around a bit inside mbedtls_mpi_random() in preparation for
breaking out mbedtls_mpi_core_random().

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2022-12-01 23:06:43 +01:00
Gilles Peskine
8a32a75aa2 mbedtls_mpi_random: avoid local allocation 
Rewrite the minimum bound comparison to avoid a local allocation. This costs
a bit of code size, but saves RAM. This is in preparation for moving the
bulk of the function to the bignum_core module where allocation is not
permitted.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2022-12-01 23:06:43 +01:00
Manuel Pégourié-Gonnard
660b396e41 Merge pull request #975 from yanesca/issue-946 
Fix RSA side channel
 2022-11-23 10:30:35 +01:00
Janos Follath
3165f063b5 mpi_exp_mod: use x_index consistently 
Signed-off-by: Janos Follath <janos.follath@arm.com>
 2022-11-22 15:04:11 +00:00