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ecp_curves: Added unit-tests for secp256k1

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This patch introduces basic unit-testing for the `ecp_mod_p256k1()`.

The method is exposed through the ecp_invasive interface, and
the standard testing data is being provided by the python framework.

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
This commit is contained in:
Minos Galanakis
2023-04-11 17:25:31 +01:00
parent 4bf08f86bb
commit d6751dcd8b
4 changed files with 120 additions and 2 deletions
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6
library/ecp_curves.c
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@@ -4617,7 +4617,8 @@ MBEDTLS_STATIC_TESTABLE
int mbedtls_ecp_mod_p224k1(mbedtls_mpi *);
#endif
#if defined(MBEDTLS_ECP_DP_SECP256K1_ENABLED)
static int ecp_mod_p256k1(mbedtls_mpi *);
MBEDTLS_STATIC_TESTABLE
int ecp_mod_p256k1(mbedtls_mpi *);
#endif
#if defined(ECP_LOAD_GROUP)
@@ -5659,7 +5660,8 @@ int mbedtls_ecp_mod_p224k1(mbedtls_mpi *N)
* Fast quasi-reduction modulo p256k1 = 2^256 - R,
* with R = 2^32 + 2^9 + 2^8 + 2^7 + 2^6 + 2^4 + 1 = 0x01000003D1
*/
static int ecp_mod_p256k1(mbedtls_mpi *N)
MBEDTLS_STATIC_TESTABLE
int ecp_mod_p256k1(mbedtls_mpi *N)
{
static mbedtls_mpi_uint Rp[] = {
MBEDTLS_BYTES_TO_T_UINT_8(0xD1, 0x03, 0x00, 0x00, 0x01, 0x00, 0x00,