Define maximum EC public key length depending on enabled curves
diff --git a/include/mbedtls/psa_util.h b/include/mbedtls/psa_util.h
index a678a77..b0c0428 100644
--- a/include/mbedtls/psa_util.h
+++ b/include/mbedtls/psa_util.h
@@ -235,7 +235,85 @@
return( -1 );
}
-#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH 256
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH 1
+
+#if defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 192 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 192 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP192R1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_SECP224R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 224 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 224 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP224R1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 256 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 256 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP256R1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 384 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 384 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP384R1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 521 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 521 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP521R1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 192 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 192 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP192K1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 224 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 224 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP224K1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_SECP256K1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 256 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 256 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_SECP256K1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_BP256R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 256 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 256 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_BP256R1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_BP384R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 384 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 384 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_BP384R1_ENABLED */
+
+#if defined(MBEDTLS_ECP_DP_BP512R1_ENABLED)
+#if MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH < ( 2 * ( ( 512 + 7 ) / 8 ) + 1 )
+#undef MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH ( 2 * ( ( 512 + 7 ) / 8 ) + 1 )
+#endif
+#endif /* MBEDTLS_ECP_DP_BP512R1_ENABLED */
+
static inline psa_ecc_curve_t mbedtls_psa_translate_ecc_group( mbedtls_ecp_group_id grpid )
{
@@ -298,6 +376,7 @@
}
}
+
#define MBEDTLS_PSA_ECC_KEY_BITS_OF_CURVE( curve ) \
( curve == PSA_ECC_CURVE_SECP192R1 ? 192 : \
curve == PSA_ECC_CURVE_SECP224R1 ? 224 : \