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Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
This commit is contained in:
Gabor Mezei 2023-03-06 16:17:02 +01:00
parent d034b3d0d2
commit 97803abd2a
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GPG Key ID: F072ACA227ACD71D
1 changed files with 4 additions and 1 deletions
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library/ecp_curves.c
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@ -5080,7 +5080,7 @@ int mbedtls_ecp_mod_p224_raw(mbedtls_mpi_uint *X, size_t X_limbs)
RESET; RESET;
/* Use 2^224 = P + 2^96 - 1 to modulo reduce the final carry */ /* Use 2^224 = P + 2^96 - 1 to modulo reduce the final carry */
SUB_LAST; NEXT; // A0 += -last_c SUB_LAST; NEXT; // A0 -= last_c
; NEXT; // A1 ; NEXT; // A1
; NEXT; // A2 ; NEXT; // A2
ADD_LAST; NEXT; // A3 += last_c ADD_LAST; NEXT; // A3 += last_c
@ -5088,6 +5088,9 @@ int mbedtls_ecp_mod_p224_raw(mbedtls_mpi_uint *X, size_t X_limbs)
; NEXT; // A5 ; NEXT; // A5
// A6 // A6
/* The carry reduction cannot generate a carry
* (see commit 73e8553 for details)*/
LAST; LAST;
return 0; return 0;