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Commit Graph

126 Commits

Author SHA1 Message Date
f7ff4c9a11 Tidy up, remove MPI_CORE(), and apply the naming convention
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
2022-11-22 14:58:15 +00:00
d9b2348d8f Extract MPI_CORE(sub_int) from the prototype
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
2022-11-22 14:58:15 +00:00
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
909e03c52f Bignum core: fill_random: prototype
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2022-11-02 15:59:16 +01:00
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
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
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
82f131063a Update documentation following review comment
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
2022-10-25 16:29:58 +01:00
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
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
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
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
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
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
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
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
abc6fbb8d7 Fix brief description
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2022-10-21 18:36:31 +02:00
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
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
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
4086de667d Fix documentation
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2022-10-14 16:29:42 +02:00
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
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
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
7f887bdc05 Move license out of Doxygen comment
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2022-10-04 14:50:17 +02:00
dba2677597 Update documentation
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2022-10-03 17:01:02 +02:00
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
e5b8585f1e Follow parameter naming convention
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2022-09-30 13:54:02 +02:00
1c628d5700 Follow parameter naming comvention
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2022-09-30 13:36:40 +02:00
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
2b5bf4cec7 Fix doumentation
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2022-09-30 13:36:40 +02:00
f4dd3b6a6d Fix documentation
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2022-09-30 13:36:40 +02:00
cfc0eb8d22 Remove unused parameter
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
2022-09-30 13:36:39 +02:00
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
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
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
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
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
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
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
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
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
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
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
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
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
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
5dd97e60d5 Update comments following code review
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
2022-08-30 14:31:49 +01:00
b496486cdc Reorder functions in bignum_core.[ch]
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
2022-08-30 11:57:22 +01:00
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