mirror/mbedtls
1
0
Fork 0
mirror of https://github.com/Mbed-TLS/mbedtls.git synced 2025-03-28 19:21:08 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Add documentation

Browse Source 
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
This commit is contained in:
Gabor Mezei 2023-02-23 17:38:00 +01:00
parent f65a059a64
commit a835d20cde
No known key found for this signature in database
GPG Key ID: F072ACA227ACD71D
2 changed files with 20 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
library/ecp_curves.c
View File

@ -5077,20 +5077,20 @@ int ecp_mod_p224_raw(mbedtls_mpi_uint *Np, size_t Nn)
RESET;
SUB_LAST; NEXT; // A0
/* Use 2^224 = P + 2^96 - 1 to modulo reduce the final carry */
SUB_LAST; NEXT; // A0 += -last_c
NEXT; // A1
NEXT; // A2
ADD_LAST; NEXT; // A3
ADD_LAST; NEXT; // A3 += last_c
NEXT; // A4
NEXT; // A5
// A6
RESET;
SUB_LAST; NEXT; // A0
SUB_LAST; NEXT; // A0 += -last_c
NEXT; // A1
NEXT; // A2
ADD_LAST; NEXT; // A3
ADD_LAST; NEXT; // A3 += last_c
NEXT; // A4
NEXT; // A5
// A6

15
library/ecp_invasive.h
View File

@ -96,6 +96,21 @@ int mbedtls_ecp_mod_p192_raw(mbedtls_mpi_uint *Np, size_t Nn);
#if defined(MBEDTLS_ECP_DP_SECP224R1_ENABLED)
/** Fast quasi-reduction modulo p224 (FIPS 186-3 D.2.2)
*
* \param[in,out] Np The address of the MPI to be converted.
* Must have exact limb size that stores a 448-bit MPI
* (double the bitlength of the modulus).
* Upon return holds the reduced value which is
* in range `0 <= X < 2 * N` (where N is the modulus).
* The bitlength of the reduced value is the same as
* that of the modulus (224 bits).
* \param[in] Nn The length of \p Nn in limbs.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if \p Nn is not the limb
* size that sores a 448-bit MPI.
*/
MBEDTLS_STATIC_TESTABLE
int ecp_mod_p224_raw(mbedtls_mpi_uint *Np, size_t Nn);