fix: add const to wc_Ed448 DER export function signatures

Author: MarkAtwood

wolfcrypt/src/asn.c

@@ -12621,7 +12621,7 @@ int wc_Ed25519PublicKeyToDer(const ed25519_key* key, byte* output, word32 inLen,
  * @return  BAD_FUNC_ARG when key is NULL.
  * @return  MEMORY_E when dynamic memory allocation failed.
  */
-int wc_Ed448PublicKeyToDer(ed448_key* key, byte* output, word32 inLen,
+int wc_Ed448PublicKeyToDer(const ed448_key* key, byte* output, word32 inLen,
                            int withAlg)
 {
     int    ret;
@@ -32022,7 +32022,7 @@ int wc_Curve448PublicKeyDecode(const byte* input, word32* inOutIdx,
 #if defined(HAVE_ED448) && defined(HAVE_ED448_KEY_EXPORT)
 /* Write a Private ecc key, including public to DER format,
  * length on success else < 0 */
-int wc_Ed448KeyToDer(ed448_key* key, byte* output, word32 inLen)
+int wc_Ed448KeyToDer(const ed448_key* key, byte* output, word32 inLen)
 {
     if (key == NULL) {
         return BAD_FUNC_ARG;
@@ -32033,7 +32033,7 @@ int wc_Ed448KeyToDer(ed448_key* key, byte* output, word32 inLen)
 
 /* Write only private ecc key to DER format,
  * length on success else < 0 */
-int wc_Ed448PrivateKeyToDer(ed448_key* key, byte* output, word32 inLen)
+int wc_Ed448PrivateKeyToDer(const ed448_key* key, byte* output, word32 inLen)
 {
     if (key == NULL) {
         return BAD_FUNC_ARG;

wolfssl/wolfcrypt/asn_public.h

@@ -851,11 +851,11 @@ WOLFSSL_API int wc_Ed448PublicKeyDecode(
     const byte* input, word32* inOutIdx, ed448_key* key, word32 inSz);
 #endif
 #ifdef HAVE_ED448_KEY_EXPORT
-WOLFSSL_API int wc_Ed448KeyToDer(ed448_key* key, byte* output, word32 inLen);
+WOLFSSL_API int wc_Ed448KeyToDer(const ed448_key* key, byte* output, word32 inLen);
 WOLFSSL_API int wc_Ed448PrivateKeyToDer(
-    ed448_key* key, byte* output, word32 inLen);
+    const ed448_key* key, byte* output, word32 inLen);
 WOLFSSL_API int wc_Ed448PublicKeyToDer(
-    ed448_key* key, byte* output, word32 inLen, int withAlg);
+    const ed448_key* key, byte* output, word32 inLen, int withAlg);
 #endif
 #endif /* HAVE_ED448 */