f663ddc7b0
Signed-off-by: Patrick Steuer <patrick.steuer@de.ibm.com> Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/9282)
133 lines
4.2 KiB
C
133 lines
4.2 KiB
C
/*
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* Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* This is a very simple provider that does absolutely nothing except respond
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* to provider global parameter requests. It does this by simply echoing back
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* a parameter request it makes to the loading library.
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*/
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#include <string.h>
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#include <stdio.h>
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/*
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* When built as an object file to link the application with, we get the
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* init function name through the macro PROVIDER_INIT_FUNCTION_NAME. If
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* not defined, we use the standard init function name for the shared
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* object form.
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*/
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#ifdef PROVIDER_INIT_FUNCTION_NAME
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# define OSSL_provider_init PROVIDER_INIT_FUNCTION_NAME
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#endif
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#include <openssl/core.h>
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#include <openssl/core_numbers.h>
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static OSSL_core_get_param_types_fn *c_get_param_types = NULL;
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static OSSL_core_get_params_fn *c_get_params = NULL;
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/* Tell the core what params we provide and what type they are */
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static const OSSL_ITEM p_param_types[] = {
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{ OSSL_PARAM_UTF8_STRING, "greeting" },
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{ 0, NULL }
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};
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/* This is a trick to ensure we define the provider functions correctly */
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static OSSL_provider_get_param_types_fn p_get_param_types;
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static OSSL_provider_get_params_fn p_get_params;
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static const OSSL_ITEM *p_get_param_types(void *_)
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{
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return p_param_types;
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}
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static int p_get_params(void *vprov, OSSL_PARAM params[])
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{
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const OSSL_PROVIDER *prov = vprov;
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OSSL_PARAM *p = params;
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int ok = 1;
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for (; ok && p->key != NULL; p++) {
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if (strcmp(p->key, "greeting") == 0) {
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static char *opensslv;
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static char *provname;
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static char *greeting;
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static OSSL_PARAM counter_request[] = {
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/* Known libcrypto provided parameters */
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{ "openssl-version", OSSL_PARAM_UTF8_PTR,
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&opensslv, sizeof(&opensslv), 0 },
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{ "provider-name", OSSL_PARAM_UTF8_PTR,
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&provname, sizeof(&provname), 0},
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/* This might be present, if there's such a configuration */
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{ "greeting", OSSL_PARAM_UTF8_PTR,
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&greeting, sizeof(&greeting), 0 },
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{ NULL, 0, NULL, 0, 0 }
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};
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char buf[256];
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size_t buf_l;
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opensslv = provname = greeting = NULL;
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if (c_get_params(prov, counter_request)) {
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if (greeting) {
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strcpy(buf, greeting);
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} else {
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const char *versionp = *(void **)counter_request[0].data;
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const char *namep = *(void **)counter_request[1].data;
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sprintf(buf, "Hello OpenSSL %.20s, greetings from %s!",
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versionp, namep);
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}
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} else {
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sprintf(buf, "Howdy stranger...");
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}
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p->return_size = buf_l = strlen(buf) + 1;
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if (p->data_size >= buf_l)
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strcpy(p->data, buf);
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else
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ok = 0;
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}
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}
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return ok;
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}
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static const OSSL_DISPATCH p_test_table[] = {
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{ OSSL_FUNC_PROVIDER_GET_PARAM_TYPES, (void (*)(void))p_get_param_types },
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{ OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))p_get_params },
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{ 0, NULL }
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};
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int OSSL_provider_init(const OSSL_PROVIDER *provider,
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const OSSL_DISPATCH *in,
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const OSSL_DISPATCH **out,
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void **provctx)
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{
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for (; in->function_id != 0; in++) {
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switch (in->function_id) {
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case OSSL_FUNC_CORE_GET_PARAM_TYPES:
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c_get_param_types = OSSL_get_core_get_param_types(in);
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break;
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case OSSL_FUNC_CORE_GET_PARAMS:
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c_get_params = OSSL_get_core_get_params(in);
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break;
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default:
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/* Just ignore anything we don't understand */
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break;
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}
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}
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/* Because we use this in get_params, we need to pass it back */
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*provctx = (void *)provider;
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*out = p_test_table;
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return 1;
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}
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