Merge pull request wolfSSL#10372 from MarkAtwood/fix/ed448-der-const

fix: add const to wc_Ed448 DER export function key parameters

Author: dgarske

doc/dox_comments/header_files/asn_public.h

@@ -2845,7 +2845,7 @@ int wc_Ed448PublicKeyDecode(const byte* input, word32* inOutIdx,
 
     \sa wc_Ed448PrivateKeyToDer
 */
-int wc_Ed448KeyToDer(ed448_key* key, byte* output, word32 inLen);
+int wc_Ed448KeyToDer(const ed448_key* key, byte* output, word32 inLen);
 
 /*!
     \ingroup Ed448
@@ -2868,7 +2868,7 @@ int wc_Ed448KeyToDer(ed448_key* key, byte* output, word32 inLen);
 
     \sa wc_Ed448PrivateKeyDecode
 */
-int wc_Ed448PrivateKeyToDer(ed448_key* key, byte* output,
+int wc_Ed448PrivateKeyToDer(const ed448_key* key, byte* output,
                              word32 inLen);
 
 /*!
@@ -2881,19 +2881,20 @@ int wc_Ed448PrivateKeyToDer(ed448_key* key, byte* output,
     \param key Ed448 key structure with public key
     \param output Buffer for DER encoded public key
     \param inLen Size of output buffer
+    \param withAlg 1 to include algorithm identifier, 0 for key data only
 
     _Example_
     \code
     ed448_key key;
     byte der[1024];
     int derSz = wc_Ed448PublicKeyToDer(&key, der,
-                                       sizeof(der));
+                                       sizeof(der), 1);
     \endcode
 
     \sa wc_Ed448PublicKeyDecode
 */
-int wc_Ed448PublicKeyToDer(ed448_key* key, byte* output,
-                            int inLen);
+int wc_Ed448PublicKeyToDer(const ed448_key* key, byte* output,
+                            word32 inLen, int withAlg);
 
 /*!
     \ingroup Curve448

wolfcrypt/src/asn.c

@@ -12920,7 +12920,7 @@ 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;
@@ -32368,7 +32368,7 @@ 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;
@@ -32379,7 +32379,7 @@ 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

@@ -857,11 +857,11 @@ 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 */