Determine MBEDTLS_ECP_MAX_BITS automatically
MBEDTLS_ECP_MAX_BITS doesn't make sense as a configuration option: it
must not be smaller than the largest supported curve, and it's useless
to set it to a larger value. So unconditionally set it to the size of
the largest supported curve. Remove it from the build configuration.
Alternative implementations must no longer need define this macro.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/configs/config-suite-b.h b/configs/config-suite-b.h
index 28e6443..b62bdfa 100644
--- a/configs/config-suite-b.h
+++ b/configs/config-suite-b.h
@@ -84,8 +84,7 @@
#define MBEDTLS_AES_ROM_TABLES
/* Save RAM by adjusting to our exact needs */
-#define MBEDTLS_ECP_MAX_BITS 384
-#define MBEDTLS_MPI_MAX_SIZE 48 // 384 bits is 48 bytes
+#define MBEDTLS_MPI_MAX_SIZE 48 // 384-bit EC curve = 48 bytes
/* Save RAM at the expense of speed, see ecp.h */
#define MBEDTLS_ECP_WINDOW_SIZE 2