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ECC: fix import failure return

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Passing in x=0 and y=0 meant to return ECC_INF_E.
Passing in x=0, y=not 0 or x=not 0, y=0 now checks whether the point is
valid and forces a return of BAD_FUNC_ARG when IS_POINT_E is returned
from check.
This commit is contained in:
Sean Parkinson
2022-04-13 11:00:24 +10:00
parent e87ded85b4
commit 824b7a3f3f
1 changed files with 7 additions and 2 deletions
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9
wolfcrypt/src/ecc.c
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@@ -10042,7 +10042,7 @@ static int wc_ecc_import_raw_private(ecc_key* key, const char* qx,
if (err == MP_OKAY) {
if (mp_iszero(key->pubkey.x) && mp_iszero(key->pubkey.y)) {
WOLFSSL_MSG("Invalid Qx and Qy");
err = BAD_FUNC_ARG;
err = ECC_INF_E;
}
}
@@ -10163,8 +10163,13 @@ static int wc_ecc_import_raw_private(ecc_key* key, const char* qx,
}
#ifdef WOLFSSL_VALIDATE_ECC_IMPORT
if (err == MP_OKAY)
if (err == MP_OKAY) {
err = wc_ecc_check_key(key);
if (err == IS_POINT_E && (mp_iszero(key->pubkey.x) ||
mp_iszero(key->pubkey.y))) {
err = BAD_FUNC_ARG;
}
}
#endif
#ifdef WOLFSSL_VALIDATE_ECC_IMPORT