+/*
+ * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include "apps.h"
+#include "app_params.h"
+
+static int describe_param_type(char *buf, size_t bufsz, const OSSL_PARAM *param)
+{
+ const char *type_mod = "";
+ const char *type = NULL;
+ int show_type_number = 0;
+ int printed_len;
+
+ switch (param->data_type) {
+ case OSSL_PARAM_UNSIGNED_INTEGER:
+ type_mod = "unsigned ";
+ /* FALLTHRU */
+ case OSSL_PARAM_INTEGER:
+ type = "integer";
+ break;
+ case OSSL_PARAM_UTF8_PTR:
+ type_mod = "pointer to a ";
+ /* FALLTHRU */
+ case OSSL_PARAM_UTF8_STRING:
+ type = "UTF8 encoded string";
+ break;
+ case OSSL_PARAM_OCTET_PTR:
+ type_mod = "pointer to an ";
+ /* FALLTHRU */
+ case OSSL_PARAM_OCTET_STRING:
+ type = "octet string";
+ break;
+ default:
+ type = "unknown type";
+ show_type_number = 1;
+ break;
+ }
+
+ printed_len = BIO_snprintf(buf, bufsz, "%s: ", param->key);
+ if (printed_len > 0) {
+ buf += printed_len;
+ bufsz -= printed_len;
+ }
+ printed_len = BIO_snprintf(buf, bufsz, "%s%s", type_mod, type);
+ if (printed_len > 0) {
+ buf += printed_len;
+ bufsz -= printed_len;
+ }
+ if (show_type_number) {
+ printed_len = BIO_snprintf(buf, bufsz, " [%d]", param->data_type);
+ if (printed_len > 0) {
+ buf += printed_len;
+ bufsz -= printed_len;
+ }
+ }
+ if (param->data_size == 0)
+ printed_len = BIO_snprintf(buf, bufsz, " (arbitrary size)");
+ else
+ printed_len = BIO_snprintf(buf, bufsz, " (max %zu bytes large)",
+ param->data_size);
+ if (printed_len > 0) {
+ buf += printed_len;
+ bufsz -= printed_len;
+ }
+ *buf = '\0';
+ return 1;
+}
+
+int print_param_types(const char *thing, const OSSL_PARAM *pdefs, int indent)
+{
+ if (pdefs == NULL) {
+ BIO_printf(bio_out, "%*sNo declared %s\n", indent, " ", thing);
+ } else if (pdefs->key == NULL) {
+ /*
+ * An empty list? This shouldn't happen, but let's just make sure to
+ * say something if there's a badly written provider...
+ */
+ BIO_printf(bio_out, "%*sEmpty list of %s (!!!)\n", indent, " ", thing);
+ } else {
+ BIO_printf(bio_out, "%*s%s:\n", indent, " ", thing);
+ for (; pdefs->key != NULL; pdefs++) {
+ char buf[200]; /* This should be ample space */
+
+ describe_param_type(buf, sizeof(buf), pdefs);
+ BIO_printf(bio_out, "%*s %s\n", indent, " ", buf);
+ }
+ }
+ return 1;
+}
+