crypto/ec/curve448/eddsa.c: fix EBCDIC platforms

Signed-off-by: Patrick Steuer <[email protected]>

Reviewed-by: Matt Caswell <[email protected]>
(Merged from openssl#11229)

Author: p-steuer

crypto/ec/curve448/eddsa.c

@@ -58,7 +58,12 @@ static c448_error_t hash_init_with_dom(OPENSSL_CTX *ctx, EVP_MD_CTX *hashctx,
                                        const uint8_t *context,
                                        size_t context_len)
 {
-    const char *dom_s = "SigEd448";
+#ifdef CHARSET_EBCDIC
+    const char dom_s[] = {0x53, 0x69, 0x67, 0x45,
+                          0x64, 0x34, 0x34, 0x38, 0x00};
+#else
+    const char dom_s[] = "SigEd448";
+#endif
     uint8_t dom[2];
     EVP_MD *shake256 = NULL;