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129 Commits

Author SHA1 Message Date
Manuel Pégourié-Gonnard
75ed58723e Add optionally unsafe variant of exp_mod for perf 
Attempt to partially solve the performance regression in 3.6.0 without
adding too much code size.

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
 2024-06-18 12:52:45 +02:00
Janos Follath
23dc8b5fd8
Fix code style 
Co-authored-by: Dave Rodgman <dave.rodgman@arm.com>
Signed-off-by: Janos Follath <janos.follath@arm.com>
 2024-03-11 10:39:57 +00:00
Janos Follath
adb9d2d822 Remove volatile from declaration 
Use of volatile is more an internal implementation detail (ensuring
const-time) than part of the contract (the caller doesn't care about
volatile as such).

Signed-off-by: Janos Follath <janos.follath@arm.com>
 2024-03-11 10:03:05 +00:00
Janos Follath
d6df0a5dac Fix use of volatile 
We need the pointer, A, to be volatile, to ensure the reads happen. bits
does not need to be volatile.

Signed-off-by: Janos Follath <janos.follath@arm.com>
 2024-03-11 09:40:03 +00:00
Janos Follath
30f49f19cc Hinder unwanted optimisations 
We want this function to be constant time. Make it less likely that the
compiler optimises it.

Signed-off-by: Janos Follath <janos.follath@arm.com>
 2024-03-08 16:29:54 +00:00
Janos Follath
aec1a868fe Use mbedtls_ct_condition_t in mpi_core_check_zero 
Signed-off-by: Janos Follath <janos.follath@arm.com>
 2024-02-21 11:24:20 +00:00
Dave Rodgman
16799db69a update headers 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-11-02 19:47:20 +00:00
Dave Rodgman
85061b97b5 Improve sanity checking of MBEDTLS_HAVE_INTxx 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-09-06 08:41:05 +01:00
Dave Rodgman
b7b8c09c81
Update bignum_core.c 
Co-authored-by: Gilles Peskine <gilles.peskine@arm.com>
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-09-05 20:35:19 +01:00
Dave Rodgman
7e1e7be8fc Simplify fixes for unreachable code 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-09-05 18:15:31 +01:00
Dave Rodgman
cfa722324c Fix warnings about unreachable code 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-09-05 16:53:33 +01:00
Manuel Pégourié-Gonnard
54da1a69a2
Merge pull request #7578 from daverodgman/safer-ct5 
Improve constant-time interface
 2023-08-10 16:57:39 +00:00
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
Dave Rodgman
4883f109a0 Reduce code size for exp_mod_get_window_size 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-08-09 20:42:54 +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
Agathiyan Bragadeesh
5058a5b5ad Remove trailing whitespace bignum_core 
Signed-off-by: Agathiyan Bragadeesh <agathiyan.bragadeesh2@arm.com>
 2023-07-17 15:23:52 +01:00
Agathiyan Bragadeesh
e55a1e1cf4 Refactor preprocessing for arm none 
Signed-off-by: Agathiyan Bragadeesh <agathiyan.bragadeesh2@arm.com>
 2023-07-17 15:00:19 +01:00
Agathiyan Bragadeesh
271a95331e Remove tautology in mbedtls_mpi_core_clz 
Signed-off-by: Agathiyan Bragadeesh <agathiyan.bragadeesh2@arm.com>
 2023-07-14 14:07:18 +01:00
Dave Rodgman
3b25c40f52 Fix RSA perf regression 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-05-26 12:42:48 +01:00
Dave Rodgman
fd492ab1be Use new CT interface in mbedtls_mpi_core_random 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-05-26 12:42:48 +01:00
Dave Rodgman
b59b73e2bc Use new CT interface in mbedtls_mpi_core_add_if 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-05-26 12:42:48 +01:00
Dave Rodgman
8ac9a1df24 Use new CT interface in mbedtls_mpi_core_lt_ct 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-05-26 12:42:48 +01:00
Dave Rodgman
231a516682 Remove not-needed mbedtls_ct_mpi_uint_cond_assign 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-05-26 12:42:48 +01:00
Dave Rodgman
fd7fab4073 Update mbedtls_mpi_core_uint_le_mpi to new CT interface 
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
Paul Elliott
f0806bee66
Merge pull request #7489 from minosgalanakis/ecp/7246_xtrack_core_shift_l 
[Bignum]: Introduce left shift from prototype
 2023-05-16 17:13:19 +01:00
Minos Galanakis
b89440394f bignum_core: Removed input checking for mbedtls_mpi_core_shift_l 
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
 2023-05-04 14:40:40 +01:00
Dave Rodgman
914347bfa3 Don't explicitly inline mbedtls_mpi_core_clz 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-04-27 14:20:30 +01:00
Dave Rodgman
3b29364d61 Fix VS2022 build error 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-04-26 21:53:30 +01:00
Dave Rodgman
2e863ecde9 Remove unnecessary if to save 16 bytes 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-04-25 17:40:49 +01:00
Minos Galanakis
ec09e25251 bignum_core: Aligned xxx_core_shift_l to xxx_core_shift_r 
This patch modifies the left-shift implementation to closely
align in interface and behaviour to the existing right-shift
method.

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
 2023-04-25 12:23:34 +01:00
Minos Galanakis
ad808dd5f1 bignum_core: Extracted mbedtls_mpi_shift_l from prototype 
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
 2023-04-25 12:23:33 +01:00
Dave Rodgman
0f16d560aa Fix documentation 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-04-24 12:53:45 +01:00
Dave Rodgman
bbf881053d Document undefined case. Clarify test code. 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-04-21 12:54:40 +01:00
Dave Rodgman
880a6b34c2 Further size optimisation 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-04-20 11:52:55 +01:00
Dave Rodgman
fe8a8cd100 Size/perf optimisation for mbedtls_mpi_core_clz 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
 2023-04-19 17:59:12 +01:00
Minos Galanakis
00bd8925a7 bignum: Removed merge scaffolding. 
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
 2023-04-05 16:13:11 +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
Hanno Becker
4ae890bbd0
Extract MPI_CORE(mul) from the prototype 
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
 2023-03-31 16:10:34 +02:00
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
Gilles Peskine
e162b4725c
Merge pull request #6777 from tom-cosgrove-arm/issue-6292-mod_inv 
Bignum: Implement high level fixed width modular inversion
 2022-12-17 13:26:02 +01:00
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
Tom Cosgrove
786848b5c5 Add low-level Montgomery conversion functions to bignum_core 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-12-15 16:56:36 +00:00
Tom Cosgrove
30f3b4d601 Add mbedtls_mpi_core_check_zero_ct() and tests 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-12-15 16:56:36 +00:00
Gilles Peskine
6b7ce968d2 Clarify some comments 
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2022-12-15 15:04:33 +01:00
Manuel Pégourié-Gonnard
a9ac61203b
Merge pull request #6666 from daverodgman/fast_unaligned 
Fast unaligned memory access macros
 2022-12-12 12:18:17 +01:00
Tom Cosgrove
0a0ddedfb7 Have mbedtls_mpi_core_exp_mod() take a temporary instead of allocating memory 
Last PR needed for #6293

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-12-06 14:37:18 +00:00
Tom Cosgrove
ecda186893 Require input to mbedtls_mpi_core_exp_mod() to already be in Montgomery form 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-12-06 10:46:30 +00:00