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Adding checks on ec import.

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
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Pol Henarejos 2023-02-13 23:30:27 +01:00
parent 68071825c2
commit af16be64a2
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GPG key ID: C0095B7870A4CCD3
1 changed files with 9 additions and 1 deletions
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10
src/hsm/kek.c
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@ -589,8 +589,16 @@ int dkek_decode_key(uint8_t id, void *key_ctx, const uint8_t *in, size_t in_len,
mbedtls_ecdsa_free(ecdsa);
return CCID_EXEC_ERROR;
}
ofs += len;
r = mbedtls_ecp_mul(&ecdsa->grp, &ecdsa->Q, &ecdsa->d, &ecdsa->grp.G, random_gen, NULL);
//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) {
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);
return CCID_EXEC_ERROR;