125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// In Samsung R&D Institute Ukraine, LLC (SRUKR) under a contract between
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// Samsung R&D Institute Ukraine, LLC (Kyiv, Ukraine)
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// and "Samsung Electronics Co", Ltd (Seoul, Republic of Korea)
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// Copyright: (c) Samsung Electronics Co, Ltd 2024. All rights reserved.
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//
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#include <crypto/aes.h>
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#include <crypto/skcipher.h>
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#include <linux/err.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include "fips140.h"
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#include "fips140_test.h"
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int skc_fips_enabled;
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EXPORT_SYMBOL_GPL(skc_fips_enabled);
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#ifdef CONFIG_CRYPTO_SKC_FIPS_FUNC_TEST
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static int functest_status;
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#endif
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static int __init fips140_post(void)
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{
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int err_kat = -1;
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int err_integrity = -1;
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skc_fips_enabled = 0;
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pr_info("FIPS : POST (%s)\n", SKC_VERSION_TEXT);
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err_kat = fips140_kat();
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err_integrity = do_integrity_check();
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if (err_kat || err_integrity) {
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pr_err("FIPS : POST - one or more selftests failed\n");
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#ifdef CONFIG_CRYPTO_SKC_FIPS_FUNC_TEST
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if (functest_status) {
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pr_err("FIPS : POST - bypass panic because of functional test\n");
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return -1;
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}
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panic("FIPS : POST - one or more selftests failed\n");
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#else
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panic("FIPS : POST - one or more selftests failed\n");
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#endif
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}
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skc_fips_enabled = 1;
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pr_info("FIPS : POST - CRYPTO API started in FIPS approved mode : skc_fips_enabled = %d\n",
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skc_fips_enabled);
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return 0;
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}
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// When SKC_FUNC_TEST is defined, this function will be called instead of fips140_post.
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// After all tests are done, the normal POST test will start.
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#ifdef CONFIG_CRYPTO_SKC_FIPS_FUNC_TEST
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static int __init fips140_post_func_test(void)
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{
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int i;
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int err = -ENOMEM;
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struct crypto_skcipher *tfm = NULL;
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pr_info("FIPS FUNC : Functional test start\n");
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functest_status = 1;
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for (i = 0; i < SKC_FUNCTEST_KAT_CASE_NUM; i++) {
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set_fips_functest_KAT_mode(i);
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pr_info("FIPS FUNC : --------------------------------------------------\n");
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pr_info("FIPS FUNC : Failure inducement case %d - [%s]\n",
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i + 1, get_fips_functest_mode());
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pr_info("FIPS FUNC : --------------------------------------------------\n");
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err = fips140_post();
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pr_info("FIPS FUNC : (%d) POST done. SKC module FIPS status : fips140_post() returns %d | %s\n",
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i+1, err, skc_fips_enabled ? "passed" : "failed");
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}
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functest_status = 0;
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for (i = 0; i < SKC_FUNCTEST_CONDITIONAL_CASE_NUM; i++) {
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set_fips_functest_conditional_mode(i);
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pr_info("FIPS FUNC : --------------------------------------------------\n");
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pr_info("FIPS FUNC : Conditional test case %d - [%s]\n", i + 1, get_fips_functest_mode());
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pr_info("FIPS FUNC : --------------------------------------------------\n");
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if (!strcmp("zeroization", get_fips_functest_mode())) {
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uint8_t key[AES_KEYSIZE_256];
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memset(key, 0xFE, AES_KEYSIZE_256);
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tfm = crypto_alloc_skcipher("ecb(aes-ce)", 0, 0);
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if (tfm) {
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crypto_skcipher_setkey(tfm, key, AES_KEYSIZE_256);
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crypto_free_skcipher(tfm);
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}
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}
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}
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set_fips_functest_conditional_mode(-1);
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pr_info("FIPS FUNC : Functional test end\n");
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pr_info("FIPS FUNC : Normal POST start\n");
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return fips140_post();
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}
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#endif
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/*
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* If an init function is provided, an exit function must also be provided
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* to allow module unload.
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*/
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static void __exit fips140_fini(void) { }
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#ifdef CONFIG_CRYPTO_SKC_FIPS_FUNC_TEST
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late_initcall(fips140_post_func_test);
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#else
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late_initcall(fips140_post);
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#endif
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module_exit(fips140_fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("FIPS140 POST");
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