mbedtls_ecp_group::nbits - syntax, references, description

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size_t nbits; /*!< For Short Weierstrass: The number of bits in \p P.

ecp.h:246

size_t n_size = (grp->nbits + 7) / 8;

ecdsa.c:207

derive_mpi()

if (use_size * 8 > grp->nbits) {

ecdsa.c:211

derive_mpi()

MBEDTLS_MPI_CHK(mbedtls_mpi_shift_r(x, use_size * 8 - grp->nbits));

ecdsa.c:212

derive_mpi()

size_t grp_len = (grp->nbits + 7) / 8;

ecdsa.c:409

mbedtls_ecdsa_sign_det_restartable()

grp->nbits = 0;

ecp.c:521

mbedtls_ecp_group_init()

w = grp->nbits >= 384 ? 5 : 4;

ecp.c:2247

ecp_pick_window_size()

if (w >= grp->nbits) {

ecp.c:2272

ecp_pick_window_size()

d = (grp->nbits + w - 1) / w;

ecp.c:2317

ecp_mul_comb()

i = grp->nbits + 1; /* one past the (zero-based) required msb for private keys */

ecp.c:2586

ecp_mul_mxz()

if (mbedtls_mpi_size(&pt->X) > (grp->nbits + 7) / 8) {

ecp.c:3031

ecp_check_pubkey_mx()

mbedtls_mpi_bitlen(d) - 1 != grp->nbits) { /* mbedtls_mpi_bitlen is one-based! */

ecp.c:3090

mbedtls_ecp_check_privkey()

if (grp->nbits == 254 && mbedtls_mpi_get_bit(d, 2) != 0) {

ecp.c:3095

mbedtls_ecp_check_privkey()

return mbedtls_ecp_gen_privkey_mx(grp->nbits, d, f_rng, p_rng);

ecp.c:3175

mbedtls_ecp_gen_privkey()

size_t len = (key->grp.nbits + 7) / 8;

ecp.c:3372

mbedtls_ecp_write_key_ext()

grp->nbits = mbedtls_mpi_bitlen(&grp->N);

grp->nbits = 254;

grp->nbits = mbedtls_mpi_bitlen(&grp->N);

pkparse.c:247

pk_group_from_specified()

if (grp->pbits == ref.pbits && grp->nbits == ref.nbits &&

pkparse.c:274

pk_group_id_from_group()

m = ecp_group.nbits;

psa_crypto.c:6212

psa_generate_derived_ecc_key_weierstrass_helper()

*bits = ecp->grp.nbits + 1;

psa_crypto_ecp.c:230

mbedtls_psa_ecp_import_key()

*bits = ecp->grp.nbits;

psa_crypto_ecp.c:232

mbedtls_psa_ecp_import_key()

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Data Use

mbedtls_ecp_group::nbits is written by 4 functions and is read by 12 functions:

mbedtls_ecp_group_init()

ecp_group_load()

ecp_use_curve25519()

pk_group_from_specified()

mbedtls_ecp_group::nbits

derive_mpi()

mbedtls_ecdsa_sign_det_restartable()

ecp_pick_window_size()

ecp_mul_comb()

ecp_mul_mxz()

ecp_check_pubkey_mx()

mbedtls_ecp_check_privkey()

mbedtls_ecp_gen_privkey()

mbedtls_ecp_write_key_ext()

pk_group_id_from_group()

psa_generate_derived_ecc_key_weierstrass_helper()

mbedtls_psa_ecp_import_key()

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mbedtls_ecp_group::nbits field

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