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Fix check for format supported by PSA

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For non-Weierstrass curves there's only one format and it's supported.

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
This commit is contained in:
Manuel Pégourié-Gonnard 2023-08-03 10:22:41 +02:00
parent f1b7633443
commit 52e9548c22
1 changed files with 4 additions and 2 deletions
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6
library/pkparse.c
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@ -302,8 +302,10 @@ static int pk_ecc_set_pubkey(mbedtls_pk_context *pk,
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
/* Load the key */
if (*pub == 0x04) {
/* Uncompressed format, directly supported by PSA */
if (!PSA_ECC_FAMILY_IS_WEIERSTRASS(pk->ec_family) || *pub == 0x04) {
/* Format directly supported by PSA:
* - non-Weierstrass curves that only have one format;
* - uncompressed format for Weierstrass curves. */
if (pub_len > sizeof(pk->pub_raw)) {
return MBEDTLS_ERR_PK_BUFFER_TOO_SMALL;
}