openssl/providers/fips/fipsprov.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
 */

#include <string.h>
#include <stdio.h>
#include <openssl/core.h>
#include <openssl/core_numbers.h>
#include <openssl/core_names.h>
#include <openssl/params.h>
#include <openssl/err.h>
#include "internal/cryptlib.h"

/* Functions provided by the core */
static OSSL_core_get_param_types_fn *c_get_param_types = NULL;
static OSSL_core_get_params_fn *c_get_params = NULL;
static OSSL_core_put_error_fn *c_put_error = NULL;
static OSSL_core_add_error_vdata_fn *c_add_error_vdata = NULL;

/* Parameters we provide to the core */
static const OSSL_ITEM fips_param_types[] = {
    { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_NAME },
    { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_VERSION },
    { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_BUILDINFO },
    { 0, NULL }
};

static void fips_teardown(void)
{
    do_default_context_deinit();
}

static const OSSL_ITEM *fips_get_param_types(const OSSL_PROVIDER *prov)
{
    return fips_param_types;
}

static int fips_get_params(const OSSL_PROVIDER *prov,
                            const OSSL_PARAM params[])
{
    const OSSL_PARAM *p;

    p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_NAME);
    if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "OpenSSL FIPS Provider"))
        return 0;
    p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_VERSION);
    if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR))
        return 0;
    p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_BUILDINFO);
    if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_FULL_VERSION_STR))
        return 0;

    return 1;
}

extern const OSSL_DISPATCH sha256_functions[];

static const OSSL_ALGORITHM fips_digests[] = {
    { "SHA256", "fips=yes", sha256_functions },
    { NULL, NULL, NULL }
};

static const OSSL_ALGORITHM *fips_query(OSSL_PROVIDER *prov,
                                         int operation_id,
                                         int *no_cache)
{
    *no_cache = 0;
    switch (operation_id) {
    case OSSL_OP_DIGEST:
        return fips_digests;
    }
    return NULL;
}

/* Functions we provide to the core */
static const OSSL_DISPATCH fips_dispatch_table[] = {
    { OSSL_FUNC_PROVIDER_TEARDOWN, (void (*)(void))fips_teardown },
    { OSSL_FUNC_PROVIDER_GET_PARAM_TYPES, (void (*)(void))fips_get_param_types },
    { OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))fips_get_params },
    { OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))fips_query },
    { 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_GET_PARAM_TYPES:
            c_get_param_types = OSSL_get_core_get_param_types(in);
            break;
        case OSSL_FUNC_CORE_GET_PARAMS:
            c_get_params = OSSL_get_core_get_params(in);
            break;
        case OSSL_FUNC_CORE_PUT_ERROR:
            c_put_error = OSSL_get_core_put_error(in);
            break;
        case OSSL_FUNC_CORE_ADD_ERROR_VDATA:
            c_add_error_vdata = OSSL_get_core_add_error_vdata(in);
            break;
        /* Just ignore anything we don't understand */
        default:
            break;
        }
    }

    *out = fips_dispatch_table;
    return 1;
}

OSSL_provider_init_fn fips_intern_provider_init;
int fips_intern_provider_init(const OSSL_PROVIDER *provider,
                              const OSSL_DISPATCH *in,
                              const OSSL_DISPATCH **out)
{
    /*
     * The internal init function used when the FIPS module uses EVP to call
     * another algorithm also in the FIPS module.
     */
    return 1;
}

void ERR_put_error(int lib, int func, int reason, const char *file, int line)
{
    /*
     * TODO(3.0): This works for the FIPS module because we're going to be
     * using lib/func/reason codes that libcrypto already knows about. This
     * won't work for third party providers that have their own error mechanisms,
     * so we'll need to come up with something else for them.
     */
    c_put_error(lib, func, reason, file, line);
}

void ERR_add_error_data(int num, ...)
{
    va_list args;
    va_start(args, num);
    ERR_add_error_vdata(num, args);
    va_end(args);
}

void ERR_add_error_vdata(int num, va_list args)
{
    c_add_error_vdata(num, args);
}