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/*
* Copyright 2019-2021 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 <openssl/self_test.h>
#include <openssl/core_names.h>
#include <openssl/params.h>
#include "internal/cryptlib.h"
typedef struct self_test_cb_st
{
OSSL_CALLBACK *cb;
void *cbarg;
} SELF_TEST_CB;
struct ossl_self_test_st
{
/* local state variables */
const char *phase;
const char *type;
const char *desc;
OSSL_CALLBACK *cb;
/* callback related variables used to pass the state back to the user */
OSSL_PARAM params[4];
void *cb_arg;
};
#ifndef FIPS_MODULE
static void *self_test_set_callback_new(OSSL_LIB_CTX *ctx)
{
SELF_TEST_CB *stcb;
stcb = OPENSSL_zalloc(sizeof(*stcb));
return stcb;
}
static void self_test_set_callback_free(void *stcb)
{
OPENSSL_free(stcb);
}
static const OSSL_LIB_CTX_METHOD self_test_set_callback_method = {
OSSL_LIB_CTX_METHOD_DEFAULT_PRIORITY,
self_test_set_callback_new,
self_test_set_callback_free,
};
static SELF_TEST_CB *get_self_test_callback(OSSL_LIB_CTX *libctx)
{
return ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_SELF_TEST_CB_INDEX,
&self_test_set_callback_method);
}
void OSSL_SELF_TEST_set_callback(OSSL_LIB_CTX *libctx, OSSL_CALLBACK *cb,
void *cbarg)
{
SELF_TEST_CB *stcb = get_self_test_callback(libctx);
if (stcb != NULL) {
stcb->cb = cb;
stcb->cbarg = cbarg;
}
}
void OSSL_SELF_TEST_get_callback(OSSL_LIB_CTX *libctx, OSSL_CALLBACK **cb,
void **cbarg)
{
SELF_TEST_CB *stcb = get_self_test_callback(libctx);
if (cb != NULL)
*cb = (stcb != NULL ? stcb->cb : NULL);
if (cbarg != NULL)
*cbarg = (stcb != NULL ? stcb->cbarg : NULL);
}
#endif /* FIPS_MODULE */
static void self_test_setparams(OSSL_SELF_TEST *st)
{
size_t n = 0;
if (st->cb != NULL) {
st->params[n++] =
OSSL_PARAM_construct_utf8_string(OSSL_PROV_PARAM_SELF_TEST_PHASE,
(char *)st->phase, 0);
st->params[n++] =
OSSL_PARAM_construct_utf8_string(OSSL_PROV_PARAM_SELF_TEST_TYPE,
(char *)st->type, 0);
st->params[n++] =
OSSL_PARAM_construct_utf8_string(OSSL_PROV_PARAM_SELF_TEST_DESC,
(char *)st->desc, 0);
}
st->params[n++] = OSSL_PARAM_construct_end();
}
OSSL_SELF_TEST *OSSL_SELF_TEST_new(OSSL_CALLBACK *cb, void *cbarg)
{
OSSL_SELF_TEST *ret = OPENSSL_zalloc(sizeof(*ret));
if (ret == NULL)
return NULL;
ret->cb = cb;
ret->cb_arg = cbarg;
ret->phase = "";
ret->type = "";
ret->desc = "";
self_test_setparams(ret);
return ret;
}
void OSSL_SELF_TEST_free(OSSL_SELF_TEST *st)
{
OPENSSL_free(st);
}
/* Can be used during application testing to log that a test has started. */
void OSSL_SELF_TEST_onbegin(OSSL_SELF_TEST *st, const char *type,
const char *desc)
{
if (st != NULL && st->cb != NULL) {
st->phase = OSSL_SELF_TEST_PHASE_START;
st->type = type;
st->desc = desc;
self_test_setparams(st);
(void)st->cb(st->params, st->cb_arg);
}
}
/*
* Can be used during application testing to log that a test has either
* passed or failed.
*/
void OSSL_SELF_TEST_onend(OSSL_SELF_TEST *st, int ret)
{
if (st != NULL && st->cb != NULL) {
st->phase =
(ret == 1 ? OSSL_SELF_TEST_PHASE_PASS : OSSL_SELF_TEST_PHASE_FAIL);
self_test_setparams(st);
(void)st->cb(st->params, st->cb_arg);
st->phase = OSSL_SELF_TEST_PHASE_NONE;
st->type = OSSL_SELF_TEST_TYPE_NONE;
st->desc = OSSL_SELF_TEST_DESC_NONE;
}
}
/*
* Used for failure testing.
*
* Call the applications SELF_TEST_cb() if it exists.
* If the application callback decides to return 0 then the first byte of 'bytes'
* is modified (corrupted). This is used to modify output signatures or
* ciphertext before they are verified or decrypted.
*/
int OSSL_SELF_TEST_oncorrupt_byte(OSSL_SELF_TEST *st, unsigned char *bytes)
{
if (st != NULL && st->cb != NULL) {
st->phase = OSSL_SELF_TEST_PHASE_CORRUPT;
self_test_setparams(st);
if (!st->cb(st->params, st->cb_arg)) {
bytes[0] ^= 1;
return 1;
}
}
return 0;
}
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