mirror of https://github.com/openssl/openssl.git
134 lines
4.2 KiB
C
134 lines
4.2 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
/*
|
|
* This is a very simple provider that does absolutely nothing except respond
|
|
* to provider global parameter requests. It does this by simply echoing back
|
|
* a parameter request it makes to the loading library.
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
|
|
/*
|
|
* When built as an object file to link the application with, we get the
|
|
* init function name through the macro PROVIDER_INIT_FUNCTION_NAME. If
|
|
* not defined, we use the standard init function name for the shared
|
|
* object form.
|
|
*/
|
|
#ifdef PROVIDER_INIT_FUNCTION_NAME
|
|
# define OSSL_provider_init PROVIDER_INIT_FUNCTION_NAME
|
|
#endif
|
|
|
|
#include <openssl/core.h>
|
|
#include <openssl/core_numbers.h>
|
|
|
|
static OSSL_core_gettable_params_fn *c_gettable_params = NULL;
|
|
static OSSL_core_get_params_fn *c_get_params = NULL;
|
|
|
|
/* Tell the core what params we provide and what type they are */
|
|
static const OSSL_PARAM p_param_types[] = {
|
|
{ "greeting", OSSL_PARAM_UTF8_STRING, NULL, 0, 0 },
|
|
{ NULL, 0, NULL, 0, 0 }
|
|
};
|
|
|
|
/* This is a trick to ensure we define the provider functions correctly */
|
|
static OSSL_provider_gettable_params_fn p_gettable_params;
|
|
static OSSL_provider_get_params_fn p_get_params;
|
|
|
|
static const OSSL_PARAM *p_gettable_params(void *_)
|
|
{
|
|
return p_param_types;
|
|
}
|
|
|
|
static int p_get_params(void *vprov, OSSL_PARAM params[])
|
|
{
|
|
const OSSL_PROVIDER *prov = vprov;
|
|
OSSL_PARAM *p = params;
|
|
int ok = 1;
|
|
|
|
for (; ok && p->key != NULL; p++) {
|
|
if (strcmp(p->key, "greeting") == 0) {
|
|
static char *opensslv;
|
|
static char *provname;
|
|
static char *greeting;
|
|
static OSSL_PARAM counter_request[] = {
|
|
/* Known libcrypto provided parameters */
|
|
{ "openssl-version", OSSL_PARAM_UTF8_PTR,
|
|
&opensslv, sizeof(&opensslv), 0 },
|
|
{ "provider-name", OSSL_PARAM_UTF8_PTR,
|
|
&provname, sizeof(&provname), 0},
|
|
|
|
/* This might be present, if there's such a configuration */
|
|
{ "greeting", OSSL_PARAM_UTF8_PTR,
|
|
&greeting, sizeof(&greeting), 0 },
|
|
|
|
{ NULL, 0, NULL, 0, 0 }
|
|
};
|
|
char buf[256];
|
|
size_t buf_l;
|
|
|
|
opensslv = provname = greeting = NULL;
|
|
|
|
if (c_get_params(prov, counter_request)) {
|
|
if (greeting) {
|
|
strcpy(buf, greeting);
|
|
} else {
|
|
const char *versionp = *(void **)counter_request[0].data;
|
|
const char *namep = *(void **)counter_request[1].data;
|
|
|
|
sprintf(buf, "Hello OpenSSL %.20s, greetings from %s!",
|
|
versionp, namep);
|
|
}
|
|
} else {
|
|
sprintf(buf, "Howdy stranger...");
|
|
}
|
|
|
|
p->return_size = buf_l = strlen(buf) + 1;
|
|
if (p->data_size >= buf_l)
|
|
strcpy(p->data, buf);
|
|
else
|
|
ok = 0;
|
|
}
|
|
}
|
|
return ok;
|
|
}
|
|
|
|
static const OSSL_DISPATCH p_test_table[] = {
|
|
{ OSSL_FUNC_PROVIDER_GETTABLE_PARAMS, (void (*)(void))p_gettable_params },
|
|
{ OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))p_get_params },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
int OSSL_provider_init(const OSSL_PROVIDER *provider,
|
|
const OSSL_DISPATCH *in,
|
|
const OSSL_DISPATCH **out,
|
|
void **provctx)
|
|
{
|
|
for (; in->function_id != 0; in++) {
|
|
switch (in->function_id) {
|
|
case OSSL_FUNC_CORE_GETTABLE_PARAMS:
|
|
c_gettable_params = OSSL_get_core_gettable_params(in);
|
|
break;
|
|
case OSSL_FUNC_CORE_GET_PARAMS:
|
|
c_get_params = OSSL_get_core_get_params(in);
|
|
break;
|
|
default:
|
|
/* Just ignore anything we don't understand */
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Because we use this in get_params, we need to pass it back */
|
|
*provctx = (void *)provider;
|
|
|
|
*out = p_test_table;
|
|
return 1;
|
|
}
|