Commit Graph

46 Commits

Author SHA1 Message Date
Gabor Mezei
df29332d4b
Make mbedtls_ct_uchar_mask_of_range function static
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-12-08 16:20:39 +01:00
Gabor Mezei
3d4dba84b7
Move mbedtls_ct_base64_dec_value function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-12-08 16:20:16 +01:00
Gabor Mezei
200708d30a
Move mbedtls_ct_base64_enc_char function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-12-08 16:20:04 +01:00
Gabor Mezei
46f79c388d
Move mbedtls_ct_uchar_mask_of_range function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-12-08 16:19:41 +01:00
Gabor Mezei
dbe0f892b3
Fix documentation and comments
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:33:19 +01:00
Gabor Mezei
c0ae1cf45a
Rename internal header constant_time.h to constant_time_internal.h
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:33:19 +01:00
Gabor Mezei
18a44949d0
Rename constant-time functions to have mbedtls_ct prefix
Rename functions to better suite with the module name.

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:32:01 +01:00
Gabor Mezei
61bf64fbd0
Bind functions' availability for config options
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:54 +01:00
Gabor Mezei
e24dea8225
Move mbedtls_cf_memcmp to a new public header
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:54 +01:00
Gabor Mezei
2b35880d41
Bind functions' availability for config options
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:53 +01:00
Gabor Mezei
4e2de62fef
Remove unused function
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:53 +01:00
Gabor Mezei
fd8a42d914
Make functions static
These functions are only used as an auxiliary function for constant-time functions.

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:53 +01:00
Gabor Mezei
4b4e4d8880
Update documentation and comments
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:53 +01:00
Gabor Mezei
91deea7765
Rename and reorder function parameters
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:53 +01:00
Gabor Mezei
150bdee126
Use condition for not sensitive data
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:53 +01:00
Gabor Mezei
3c38b6e9e1
Move implementation specific comment
This comment is about how the functions are implemented, not about their
public interface, so it doesn't belong in the header file.
It applies to everything in constant_time.c so moved there.

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:52 +01:00
Gabor Mezei
2c5ed2244b
Make mbedtls_cf_size_mask_lt function static
The mbedtls_cf_size_mask_lt is solely used as an auxiliary function
for mbedtls_cf_size_mask_ge.

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:52 +01:00
gabor-mezei-arm
d5a392aa2c
Fix missing includes
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:52 +01:00
gabor-mezei-arm
7e6a1eaf8f
Add documentation for the functions
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:52 +01:00
gabor-mezei-arm
1ffd0ccf02
Unify equality checker functions return value
The equality checker functions always return 0 or 1 value,
thus the type of return value can be the same dispite of the
size of the parameters.

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:52 +01:00
gabor-mezei-arm
60febd5d8a
Propagate usage of mask generation functions
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:52 +01:00
gabor-mezei-arm
2f2c0bead3
Unify mask generation functions
Generate all-bits 0 or all bits 1 mask from a value instead of from a bit.

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:51 +01:00
gabor-mezei-arm
5e4882498e
Unify function parameters
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:51 +01:00
gabor-mezei-arm
378e7eb5cc
Unify memcmp functions
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:51 +01:00
gabor-mezei-arm
04087dffcd
Typo: Unify indentation of function parameters
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:51 +01:00
gabor-mezei-arm
f52941ef73
Move mbedtls_cf_rsaes_pkcs1_v15_unpadding function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:51 +01:00
gabor-mezei-arm
bc3a288b2c
Create mbedtls_cf_size_if function
Add a constant-time function with size_t parameter for choosing
between two integer values, like the ?: ternary operator.

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:03:04 +01:00
gabor-mezei-arm
b10301d2fc
Move mbedtls_mpi_lt_mpi_ct function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:02:38 +01:00
gabor-mezei-arm
58fc8a65ab Move mbedtls_mpi_safe_cond_swap function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:01:08 +01:00
gabor-mezei-arm
b8caeeed5c Move mbedtls_mpi_safe_cond_assign function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:00:14 +01:00
gabor-mezei-arm
cb4317b723
Move mbedtls_cf_hmac function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 10:59:04 +01:00
gabor-mezei-arm
0f7b9e43e9
Move mbedtls_cf_memcpy_offset function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 10:59:04 +01:00
gabor-mezei-arm
ee06febbb4
Move mbedtls_cf_memcpy_if_eq function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 10:59:04 +01:00
gabor-mezei-arm
7b23c0b46d
Move mbedtls_cf_mem_move_to_left function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 10:59:04 +01:00
gabor-mezei-arm
043192d209 Move mbedtls_cf_mpi_uint_cond_assign function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 10:55:56 +01:00
gabor-mezei-arm
5cec8b44a8
Move mbedtls_cf_cond_select_sign function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 10:54:20 +01:00
gabor-mezei-arm
7533253125
Move mbedtls_cf_uint_if function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 10:52:42 +01:00
gabor-mezei-arm
097d4f555e
Move mbedtls_cf_mpi_uint_lt function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 10:52:01 +01:00
gabor-mezei-arm
9d7bf09333
Move mbedtls_cf_size_gt function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 10:04:49 +01:00
gabor-mezei-arm
96584ddd4b
Move mbedtls_cf_size_bool_eq function to the constant-time module
There were multiple functions called mbedtls_cf_size_bool_eq. They had exactly
the same behavior, so move the one in bignum.c and remove the other.

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 10:03:55 +01:00
gabor-mezei-arm
a2bcabceb2
Move mbedtls_cf_size_mask_ge function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 10:00:17 +01:00
gabor-mezei-arm
4d6b14624e
Move mbedtls_cf_size_mask_lt function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 10:00:17 +01:00
gabor-mezei-arm
d361ccd663
Move mbedtls_cf_size_mask function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 10:00:17 +01:00
gabor-mezei-arm
c11cac9f1b
Move mbedtls_cf_uint_mask function to the constant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 10:00:17 +01:00
gabor-mezei-arm
944c107744
Move contatnt-time memcmp functions to the contant-time module
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 10:00:12 +01:00
gabor-mezei-arm
9055972227
Add a new file for constant-time functions
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 09:39:12 +01:00