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Add _raw function to P224K1

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Modified the testing to use the generic fast reduction test function.

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
This commit is contained in:
Gabor Mezei
2023-05-02 14:10:57 +02:00
parent dacfe56370
commit e42bb6294e
4 changed files with 26 additions and 52 deletions
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20
library/ecp_curves.c
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@ -4618,7 +4618,7 @@ int mbedtls_ecp_mod_p192k1_raw(mbedtls_mpi_uint *X, size_t X_limbs);
#if defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED)
static int ecp_mod_p224k1(mbedtls_mpi *);
MBEDTLS_STATIC_TESTABLE
int mbedtls_ecp_mod_p224k1(mbedtls_mpi *);
int mbedtls_ecp_mod_p224k1_raw(mbedtls_mpi_uint *X, size_t X_limbs);
#endif
#if defined(MBEDTLS_ECP_DP_SECP256K1_ENABLED)
static int ecp_mod_p256k1(mbedtls_mpi *);
@ -5650,30 +5650,30 @@ int mbedtls_ecp_mod_p192k1_raw(mbedtls_mpi_uint *X, size_t X_limbs)
#if defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED)
/*
* Fast quasi-reduction modulo p224k1 = 2^224 - R,
* with R = 2^32 + 2^12 + 2^11 + 2^9 + 2^7 + 2^4 + 2 + 1 = 0x0100001A93
*/
static int ecp_mod_p224k1(mbedtls_mpi *N)
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
size_t expected_width = 2 * 224 / biL;
MBEDTLS_MPI_CHK(mbedtls_mpi_grow(N, expected_width));
ret = mbedtls_ecp_mod_p224k1(N);
ret = mbedtls_ecp_mod_p224k1_raw(N->p, expected_width);
cleanup:
return ret;
}
/*
* Fast quasi-reduction modulo p224k1 = 2^224 - R,
* with R = 2^32 + 2^12 + 2^11 + 2^9 + 2^7 + 2^4 + 2 + 1 = 0x0100001A93
*/
MBEDTLS_STATIC_TESTABLE
int mbedtls_ecp_mod_p224k1(mbedtls_mpi *N)
int mbedtls_ecp_mod_p224k1_raw(mbedtls_mpi_uint *X, size_t X_limbs)
{
static mbedtls_mpi_uint Rp[] = {
MBEDTLS_BYTES_TO_T_UINT_8(0x93, 0x1A, 0x00, 0x00, 0x01, 0x00, 0x00,
0x00)
MBEDTLS_BYTES_TO_T_UINT_8(0x93, 0x1A, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00)
};
return ecp_mod_koblitz(N->p, N->n, Rp, 224);
return ecp_mod_koblitz(X, X_limbs, Rp, 224);
}
#endif /* MBEDTLS_ECP_DP_SECP224K1_ENABLED */

3
library/ecp_invasive.h
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@ -179,10 +179,11 @@ MBEDTLS_STATIC_TESTABLE
int mbedtls_ecp_mod_p192k1_raw(mbedtls_mpi_uint *X, size_t X_limbs);
#endif /* MBEDTLS_ECP_DP_SECP192K1_ENABLED */
#if defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED)
MBEDTLS_STATIC_TESTABLE
int mbedtls_ecp_mod_p224k1(mbedtls_mpi *N);
int mbedtls_ecp_mod_p224k1_raw(mbedtls_mpi_uint *X, size_t X_limbs);
#endif /* MBEDTLS_ECP_DP_SECP224K1_ENABLED */