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74 commits

Author SHA1 Message Date
Janos Follath
5933f691a2 Add merge slots to Bignum files 
Legacy Bignum is excluded as it doesn't get regular extensions like new
ones.

Each slot uses comments of their respective filetype. Since .data files
don't have a syntax for comments, dummy test cases are used. (These test
cases will never be executed and no noise will be added to tests.)

Signed-off-by: Janos Follath <janos.follath@arm.com>
 2022-11-02 17:27:25 +00:00
Gilles Peskine
909e03c52f Bignum core: fill_random: prototype 
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2022-11-02 15:59:16 +01:00
Janos Follath
8904a2db29 mpi_core_ct_uint_table_lookup: style and docs 
Signed-off-by: Janos Follath <janos.follath@arm.com>
 2022-10-31 16:51:56 +00:00
Janos Follath
e50f2f1a8e Add mbedtls_mpi_core_ct_uint_table_lookup 
This will be needed for extracting modular exponentiation from the
prototype. The function signature is kept aligned to the prototype, but
the implementation is new. (The implementation of this function in the
prototype has further optimisations which are out of scope for now.)

The function is not reused in the bignum counterpart as it will become
redundant soon.

This function is meant to be static, but doesn't have the qualifier as
it is not used yet and would cause compiler warnings. The
MBEDTLS_STATIC_TESTABLE macro will be added in a later commit.

Signed-off-by: Janos Follath <janos.follath@arm.com>
 2022-10-31 11:32:55 +00:00
Gilles Peskine
9603daddaa
Merge pull request #6230 from tom-cosgrove-arm/issue-6223-core-add 
Bignum: extract core_add from the prototype
 2022-10-27 11:25:27 +02:00
Tom Cosgrove
82f131063a Update documentation following review comment 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-10-25 16:29:58 +01:00
Tom Cosgrove
af7d44b4d2 Tidy up, remove MPI_CORE(), apply the naming convention, and use the new mbedtls_mpi_core_add() 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-10-25 16:29:58 +01:00
Hanno Becker
c98871339d Extract MPI_CORE(add) from the prototype 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-10-25 16:29:58 +01:00
Minos Galanakis
a081c51cd3 Renamed mpi_core_get_mont_R2_unsafe_neg -> mpi_core_get_mont_r2_unsafe_neg 
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
 2022-10-25 15:12:38 +01:00
Minos Galanakis
51d638baf6 bignum_core: Style update 
'mbedtls_mpi_core_get_mont_R2_unsafe' aligns const
keyword to match the style of the rest of the module.

Documentation is also updated to remove
`MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED`.

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
 2022-10-25 15:12:38 +01:00
Minos Galanakis
ae4fb671b4 mbedtls_mpi_core_get_mont_R2_unsafe: Removed NULL input checking 
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
 2022-10-25 15:12:38 +01:00
Minos Galanakis
b85506e250 bignum_core.h: Comment update for mbedtls_mpi_core_get_mont_R2_unsafe 
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
 2022-10-25 15:12:23 +01:00
Minos Galanakis
4f43f61c6a Renamed mbedtls_mpi_get_montgomery_constant_unsafe to mpi_core_get_mont_R2_unsafe 
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
 2022-10-25 15:12:23 +01:00
Hanno Becker
ec440f2397 bignum_mod_raw: Ported mbedtls_mpi_get_montgomery_constant_unsafe from prototype 
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
 2022-10-25 15:08:08 +01:00
Gilles Peskine
abc6fbb8d7 Fix brief description 
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2022-10-21 18:36:31 +02:00
Gilles Peskine
6641420951 Bignum core: Break shift_r function out of the classic shift_r 
This commit contains the function prototype for mbedtls_mpi_core_shift_r,
and the implementation minimally modified from mbedtls_mpi_shift_r.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2022-10-20 11:40:15 +02:00
Gilles Peskine
4281ae0bd2
Merge pull request #6373 from gilles-peskine-arm/bignum-core-conventions 
Spell out bignum core conventions
 2022-10-19 15:53:33 +02:00
Gilles Peskine
dcd1717f5f Forbid aliasing outputs 
Aliasing between two outputs is hardly ever useful.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2022-10-14 17:15:21 +02:00
Gabor Mezei
4086de667d
Fix documentation 
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
 2022-10-14 16:29:42 +02:00
Gilles Peskine
01af3ddc82 Fixed confusion between number size and limb size; define limb 
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2022-10-04 16:23:29 +02:00
Gilles Peskine
2926484de1 Describe generic conventions for the bignum core module 
This commit codifies some conventions that result from the original design
goals and others that have emerged after starting the implementation.

* Value ranges
* Bignum parameter naming and ordering
* Sizes
* Aliasing and overlap
* Error handling

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2022-10-04 14:51:21 +02:00
Gilles Peskine
7aab2fbe41 Add a short description of what each module does 
There was already a short introduction to _who_ should use each module, but
not to _what_ each module does.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2022-10-04 14:50:17 +02:00
Gilles Peskine
7f887bdc05 Move license out of Doxygen comment 
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
 2022-10-04 14:50:17 +02:00
Gabor Mezei
dba2677597
Update documentation 
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
 2022-10-03 17:01:02 +02:00
Gabor Mezei
86dfe384c2
Fix documentation tags to be lower case 
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
 2022-09-30 14:03:04 +02:00
Gabor Mezei
e5b8585f1e
Follow parameter naming convention 
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
 2022-09-30 13:54:02 +02:00
Gabor Mezei
1c628d5700
Follow parameter naming comvention 
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
 2022-09-30 13:36:40 +02:00
Gabor Mezei
3eff425b1a
Use only one limb parameter for assign 
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
 2022-09-30 13:36:40 +02:00
Gabor Mezei
2b5bf4cec7
Fix doumentation 
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
 2022-09-30 13:36:40 +02:00
Gabor Mezei
f4dd3b6a6d
Fix documentation 
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
 2022-09-30 13:36:40 +02:00
Gabor Mezei
cfc0eb8d22
Remove unused parameter 
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
 2022-09-30 13:36:39 +02:00
Gabor Mezei
9f6615f146
Remove argument checking from constant time functions 
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
 2022-09-30 13:36:39 +02:00
Gabor Mezei
e1d31c4aad
Add conditional swap and assign function for MPI core 
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
 2022-09-30 13:33:30 +02:00
Tom Cosgrove
6da3a3b15f Fix doc regarding aliasing of modulus input to mbedtls_mpi_core_montmul() 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-09-29 17:20:18 +01:00
Tom Cosgrove
4386ead662 Correct the aliasing requirements in doc for mbedtls_mpi_core_montmul(), and test them 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-09-29 14:40:21 +01:00
Tom Cosgrove
4782823ec3 Ensure we explicitly document the modulus for fixed-width arithmetic 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-09-20 13:51:50 +01:00
Tom Cosgrove
b0b77e1b13 Document and test aliasing of the bignums given to mbedtls_mpi_core_mla() 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-09-20 13:33:40 +01:00
Tom Cosgrove
ea45c1d2d4 Document and test aliasing of output for mbedtls_mpi_core_montmul() 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-09-20 13:17:51 +01:00
Tom Cosgrove
3bd7bc3add Use X rather than A for accumulator-style input (and output!) params, and rename others accordingly 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-09-15 15:55:07 +01:00
Tom Cosgrove
5c0e8104bc Prefer 'fixed-size' to 'known-size' in doc comments 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-09-15 15:46:10 +01:00
Tom Cosgrove
b7438d1f62 Update name of mbedtls_mpi_montg_init() 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-09-15 15:05:59 +01:00
Tom Cosgrove
818d992cc7 Note that T must not overlap other parameters of mbedtls_mpi_core_montmul() 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-09-15 14:58:10 +01:00
Tom Cosgrove
5eefc3db3f Move macros to come before function declarations 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-08-31 17:16:50 +01:00
Tom Cosgrove
630110ab23 Fix documentation where ciL should be biL 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-08-31 17:15:04 +01:00
Tom Cosgrove
ed43c6caeb In add_if(), B MAY be aliased to A. Also update another comment for consistency. 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-08-31 17:15:04 +01:00
Tom Cosgrove
5dd97e60d5 Update comments following code review 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-08-30 14:31:49 +01:00
Tom Cosgrove
b496486cdc Reorder functions in bignum_core.[ch] 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-08-30 11:57:22 +01:00
Tom Cosgrove
d932de8857 Remove incorrect constant-time claim from doc for mbedtls_mpi_core_add_if() 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-08-25 16:43:43 +01:00
Tom Cosgrove
ecbb124292 Fix incorrect parameter name in mbedtls_mpi_core_add_if() doc comment 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-08-25 10:13:44 +01:00
Tom Cosgrove
72594633a1 Apply the function parameter naming convention 
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
 2022-08-24 11:51:58 +01:00