Latest update.

apps/kdf.c

@@ -24,14 +24,20 @@ typedef enum OPTION_choice {
 
 const OPTIONS kdf_options[] = {
     {OPT_HELP_STR, 1, '-', "Usage: %s [options] kdf_name\n"},
-    {OPT_HELP_STR, 1, '-', "kdf_name\t KDF algorithm.\n"},
+
+    OPT_SECTION("General"),
     {"help", OPT_HELP, '-', "Display this summary"},
-    {"kdfopt", OPT_KDFOPT, 's', "KDF algorithm control parameters in n:v form. "
-                                "See 'Supported Controls' in the EVP_KDF_ docs"},
+    {"kdfopt", OPT_KDFOPT, 's', "KDF algorithm control parameters in n:v form"},
+    {OPT_MORE_STR, 1, '-', "See 'Supported Controls' in the EVP_KDF_ docs\n"},
     {"keylen", OPT_KEYLEN, 's', "The size of the output derived key"},
+
+    OPT_SECTION("Output"),
     {"out", OPT_OUT, '>', "Output to filename rather than stdout"},
-    {"binary", OPT_BIN, '-', "Output in binary format (Default is hexadecimal "
-                             "output)"},
+    {"binary", OPT_BIN, '-',
+        "Output in binary format (default is hexadecimal)"},
+
+    OPT_PARAMETERS(),
+    {"kdf_name", 0, 0, "Name of the KDF algorithm"},
     {NULL}
 };
 
@@ -132,6 +138,10 @@ opthelp:
         BIO_write(out, dkm_bytes, dkm_len);
     } else {
         hexout = OPENSSL_buf2hexstr(dkm_bytes, dkm_len);
+        if (hexout == NULL) {
+            BIO_printf(bio_err, "Memory allocation failure\n");
+            goto err;
+        }
         BIO_printf(out, "%s\n\n", hexout);
     }