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Reject undefined keys (eg. state is ECC_STATE_NONE) from X963 export functions

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Additionally, harmonize the failure conditions of wc_ecc_export_x963 and
wc_ecc_export_x963_compressed.
This commit is contained in:
Guido Vranken
2021-01-25 16:22:21 +01:00
parent fb9836ed28
commit 29f7eebef7
1 changed files with 13 additions and 4 deletions
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wolfcrypt/src/ecc.c
+13 -4
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@@ -7168,9 +7168,12 @@ int wc_ecc_export_x963(ecc_key* key, byte* out, word32* outLen)
if (key->type == ECC_PRIVATEKEY_ONLY)
return ECC_PRIVATEONLY_E;
if (wc_ecc_is_valid_idx(key->idx) == 0 || key->dp == NULL) {
return ECC_BAD_ARG_E;
if (key->type == ECC_STATE_NONE ||
wc_ecc_is_valid_idx(key->idx) == 0 ||
key->dp == NULL) {
return ECC_BAD_ARG_E;
}
numlen = key->dp->size;
/* verify room in out buffer */
@@ -11235,9 +11238,15 @@ static int wc_ecc_export_x963_compressed(ecc_key* key, byte* out, word32* outLen
if (key == NULL || out == NULL || outLen == NULL)
return BAD_FUNC_ARG;
if (wc_ecc_is_valid_idx(key->idx) == 0) {
return ECC_BAD_ARG_E;
if (key->type == ECC_PRIVATEKEY_ONLY)
return ECC_PRIVATEONLY_E;
if (key->type == ECC_STATE_NONE ||
wc_ecc_is_valid_idx(key->idx) == 0 ||
key->dp == NULL) {
return ECC_BAD_ARG_E;
}
numlen = key->dp->size;
if (*outLen < (1 + numlen)) {