Simplify the definition of a macro
Relying on a PSA_VENDOR macro is not ideal, since the standard doesn't
guarantee this macro exists, but OTOH relying on
MBEDTLS_ECP_DP_xxx_ENABLED was even less ideal, so I believe this is
still an improvement.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/include/mbedtls/psa_util.h b/include/mbedtls/psa_util.h
index 892d609..917799c 100644
--- a/include/mbedtls/psa_util.h
+++ b/include/mbedtls/psa_util.h
@@ -258,85 +258,8 @@
return( -1 );
}
-#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 */
-
+#define MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH \
+ PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE( PSA_VENDOR_ECC_MAX_CURVE_BITS )
/* This function transforms an ECC group identifier from
* https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-8