dearsky/pico-hsm
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If public point is not found, it is computed automatically.

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
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Pol Henarejos
2023-03-07 23:45:10 +01:00
parent 1e90699a3f
commit 963456051e
1 changed files with 5 additions and 2 deletions
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3
src/hsm/kek.c
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@@ -703,10 +703,13 @@ int dkek_decode_key(uint8_t id,
//Q
len = get_uint16_t(kb, ofs); ofs += 2;
r = mbedtls_ecp_point_read_binary(&ecdsa->grp, &ecdsa->Q, kb + ofs, len);
if (r != 0) {
r = mbedtls_ecp_mul(&ecdsa->grp, &ecdsa->Q, &ecdsa->d, &ecdsa->grp.G, random_gen, NULL);
if (r != 0) {
mbedtls_ecdsa_free(ecdsa);
return CCID_EXEC_ERROR;
}
}
r = mbedtls_ecp_check_pub_priv(ecdsa, ecdsa, random_gen, NULL);
if (r != 0) {
mbedtls_ecdsa_free(ecdsa);