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Commit Graph

50 Commits

Author SHA1 Message Date
61156f8a6a Cap the workaround for mbedtls_mpi_safe_cond_assign on MSVC/ARM64 to MSVC versions prior to 17.1.
Signed-off-by: Tautvydas Žilys <tautvydas.zilys@gmail.com>
2022-01-31 13:37:47 -08:00
ea4af4d345 Don't inline mbedtls_mpi_safe_cond_assign on MSVC/ARM64 to avoid a compiler bug.
Signed-off-by: Tautvydas Žilys <tautvydas.zilys@gmail.com>
2022-01-26 15:44:47 -08:00
3a755f511f Add documentation for the functions
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-12-08 16:24:22 +01:00
46ca2f76c4 Unify function parameters
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-12-08 16:22:45 +01:00
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
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
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
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
dbe0f892b3 Fix documentation and comments
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:33:19 +01:00
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
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
61bf64fbd0 Bind functions' availability for config options
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:54 +01:00
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
2b35880d41 Bind functions' availability for config options
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:53 +01:00
4e2de62fef Remove unused function
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:53 +01:00
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
4b4e4d8880 Update documentation and comments
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:53 +01:00
91deea7765 Rename and reorder function parameters
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:53 +01:00
150bdee126 Use condition for not sensitive data
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:53 +01:00
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
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
d5a392aa2c Fix missing includes
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:52 +01:00
7e6a1eaf8f Add documentation for the functions
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:52 +01:00
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
60febd5d8a Propagate usage of mask generation functions
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:52 +01:00
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
5e4882498e Unify function parameters
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:51 +01:00
378e7eb5cc Unify memcmp functions
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:51 +01:00
04087dffcd Typo: Unify indentation of function parameters
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2021-11-11 11:04:51 +01:00
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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