mirror of https://github.com/openssl/openssl.git
413 lines
12 KiB
C
413 lines
12 KiB
C
/*
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* Copyright 2019-2022 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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#include <string.h>
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#include <openssl/evp.h>
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#include <openssl/params.h>
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#include <openssl/crypto.h>
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#include "internal/cryptlib.h"
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#include <openssl/fipskey.h>
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#include <openssl/err.h>
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#include <openssl/proverr.h>
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#include "e_os.h"
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#include "prov/providercommon.h"
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/*
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* We're cheating here. Normally we don't allow RUN_ONCE usage inside the FIPS
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* module because all such initialisation should be associated with an
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* individual OSSL_LIB_CTX. That doesn't work with the self test though because
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* it should be run once regardless of the number of OSSL_LIB_CTXs we have.
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*/
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#define ALLOW_RUN_ONCE_IN_FIPS
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#include "internal/thread_once.h"
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#include "self_test.h"
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#define FIPS_STATE_INIT 0
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#define FIPS_STATE_SELFTEST 1
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#define FIPS_STATE_RUNNING 2
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#define FIPS_STATE_ERROR 3
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/*
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* The number of times the module will report it is in the error state
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* before going quiet.
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*/
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#define FIPS_ERROR_REPORTING_RATE_LIMIT 10
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/* The size of a temp buffer used to read in data */
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#define INTEGRITY_BUF_SIZE (4096)
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#define MAX_MD_SIZE 64
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#define MAC_NAME "HMAC"
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#define DIGEST_NAME "SHA256"
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static int FIPS_conditional_error_check = 1;
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static CRYPTO_RWLOCK *self_test_lock = NULL;
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static CRYPTO_RWLOCK *fips_state_lock = NULL;
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static unsigned char fixed_key[32] = { FIPS_KEY_ELEMENTS };
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static CRYPTO_ONCE fips_self_test_init = CRYPTO_ONCE_STATIC_INIT;
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DEFINE_RUN_ONCE_STATIC(do_fips_self_test_init)
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{
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/*
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* These locks get freed in platform specific ways that may occur after we
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* do mem leak checking. If we don't know how to free it for a particular
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* platform then we just leak it deliberately.
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*/
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self_test_lock = CRYPTO_THREAD_lock_new();
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fips_state_lock = CRYPTO_THREAD_lock_new();
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return self_test_lock != NULL;
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}
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/*
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* Declarations for the DEP entry/exit points.
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* Ones not required or incorrect need to be undefined or redefined respectively.
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*/
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#define DEP_INITIAL_STATE FIPS_STATE_INIT
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#define DEP_INIT_ATTRIBUTE static
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#define DEP_FINI_ATTRIBUTE static
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static void init(void);
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static void cleanup(void);
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/*
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* This is the Default Entry Point (DEP) code.
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* See FIPS 140-2 IG 9.10
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*/
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#if defined(_WIN32) || defined(__CYGWIN__)
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# ifdef __CYGWIN__
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/* pick DLL_[PROCESS|THREAD]_[ATTACH|DETACH] definitions */
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# include <windows.h>
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/*
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* this has side-effect of _WIN32 getting defined, which otherwise is
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* mutually exclusive with __CYGWIN__...
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*/
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# endif
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BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved);
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BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
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{
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switch (fdwReason) {
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case DLL_PROCESS_ATTACH:
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init();
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break;
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case DLL_PROCESS_DETACH:
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cleanup();
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break;
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default:
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break;
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}
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return TRUE;
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}
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#elif defined(__GNUC__)
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# undef DEP_INIT_ATTRIBUTE
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# undef DEP_FINI_ATTRIBUTE
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# define DEP_INIT_ATTRIBUTE static __attribute__((constructor))
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# define DEP_FINI_ATTRIBUTE static __attribute__((destructor))
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#elif defined(__sun)
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# pragma init(init)
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# pragma fini(cleanup)
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#elif defined(_AIX)
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void _init(void);
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void _cleanup(void);
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# pragma init(_init)
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# pragma fini(_cleanup)
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void _init(void)
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{
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init();
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}
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void _cleanup(void)
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{
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cleanup();
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}
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#elif defined(__hpux)
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# pragma init "init"
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# pragma fini "cleanup"
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#elif defined(__TANDEM)
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/* Method automatically called by the NonStop OS when the DLL loads */
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void __INIT__init(void) {
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init();
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}
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/* Method automatically called by the NonStop OS prior to unloading the DLL */
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void __TERM__cleanup(void) {
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cleanup();
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}
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#else
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/*
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* This build does not support any kind of DEP.
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* We force the self-tests to run as part of the FIPS provider initialisation
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* rather than being triggered by the DEP.
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*/
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# undef DEP_INIT_ATTRIBUTE
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# undef DEP_FINI_ATTRIBUTE
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# undef DEP_INITIAL_STATE
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# define DEP_INITIAL_STATE FIPS_STATE_SELFTEST
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#endif
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static int FIPS_state = DEP_INITIAL_STATE;
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#if defined(DEP_INIT_ATTRIBUTE)
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DEP_INIT_ATTRIBUTE void init(void)
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{
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FIPS_state = FIPS_STATE_SELFTEST;
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}
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#endif
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#if defined(DEP_FINI_ATTRIBUTE)
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DEP_FINI_ATTRIBUTE void cleanup(void)
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{
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CRYPTO_THREAD_lock_free(self_test_lock);
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CRYPTO_THREAD_lock_free(fips_state_lock);
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}
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#endif
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/*
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* Calculate the HMAC SHA256 of data read using a BIO and read_cb, and verify
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* the result matches the expected value.
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* Return 1 if verified, or 0 if it fails.
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*/
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static int verify_integrity(OSSL_CORE_BIO *bio, OSSL_FUNC_BIO_read_ex_fn read_ex_cb,
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unsigned char *expected, size_t expected_len,
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OSSL_LIB_CTX *libctx, OSSL_SELF_TEST *ev,
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const char *event_type)
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{
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int ret = 0, status;
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unsigned char out[MAX_MD_SIZE];
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unsigned char buf[INTEGRITY_BUF_SIZE];
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size_t bytes_read = 0, out_len = 0;
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EVP_MAC *mac = NULL;
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EVP_MAC_CTX *ctx = NULL;
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OSSL_PARAM params[2], *p = params;
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OSSL_SELF_TEST_onbegin(ev, event_type, OSSL_SELF_TEST_DESC_INTEGRITY_HMAC);
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mac = EVP_MAC_fetch(libctx, MAC_NAME, NULL);
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if (mac == NULL)
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goto err;
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ctx = EVP_MAC_CTX_new(mac);
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if (ctx == NULL)
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goto err;
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*p++ = OSSL_PARAM_construct_utf8_string("digest", DIGEST_NAME, 0);
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*p = OSSL_PARAM_construct_end();
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if (!EVP_MAC_init(ctx, fixed_key, sizeof(fixed_key), params))
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goto err;
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while (1) {
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status = read_ex_cb(bio, buf, sizeof(buf), &bytes_read);
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if (status != 1)
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break;
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if (!EVP_MAC_update(ctx, buf, bytes_read))
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goto err;
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}
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if (!EVP_MAC_final(ctx, out, &out_len, sizeof(out)))
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goto err;
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OSSL_SELF_TEST_oncorrupt_byte(ev, out);
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if (expected_len != out_len
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|| memcmp(expected, out, out_len) != 0)
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goto err;
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ret = 1;
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err:
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OSSL_SELF_TEST_onend(ev, ret);
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EVP_MAC_CTX_free(ctx);
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EVP_MAC_free(mac);
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return ret;
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}
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static void set_fips_state(int state)
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{
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if (ossl_assert(CRYPTO_THREAD_write_lock(fips_state_lock) != 0)) {
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FIPS_state = state;
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CRYPTO_THREAD_unlock(fips_state_lock);
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}
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}
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/* This API is triggered either on loading of the FIPS module or on demand */
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int SELF_TEST_post(SELF_TEST_POST_PARAMS *st, int on_demand_test)
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{
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int ok = 0;
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int kats_already_passed = 0;
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long checksum_len;
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OSSL_CORE_BIO *bio_module = NULL, *bio_indicator = NULL;
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unsigned char *module_checksum = NULL;
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unsigned char *indicator_checksum = NULL;
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int loclstate;
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OSSL_SELF_TEST *ev = NULL;
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if (!RUN_ONCE(&fips_self_test_init, do_fips_self_test_init))
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return 0;
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if (!CRYPTO_THREAD_read_lock(fips_state_lock))
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return 0;
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loclstate = FIPS_state;
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CRYPTO_THREAD_unlock(fips_state_lock);
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if (loclstate == FIPS_STATE_RUNNING) {
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if (!on_demand_test)
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return 1;
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} else if (loclstate != FIPS_STATE_SELFTEST) {
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ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_STATE);
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return 0;
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}
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if (!CRYPTO_THREAD_write_lock(self_test_lock))
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return 0;
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if (!CRYPTO_THREAD_read_lock(fips_state_lock)) {
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CRYPTO_THREAD_unlock(self_test_lock);
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return 0;
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}
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if (FIPS_state == FIPS_STATE_RUNNING) {
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CRYPTO_THREAD_unlock(fips_state_lock);
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if (!on_demand_test) {
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CRYPTO_THREAD_unlock(self_test_lock);
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return 1;
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}
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set_fips_state(FIPS_STATE_SELFTEST);
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} else if (FIPS_state != FIPS_STATE_SELFTEST) {
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CRYPTO_THREAD_unlock(fips_state_lock);
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CRYPTO_THREAD_unlock(self_test_lock);
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ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_STATE);
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return 0;
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} else {
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CRYPTO_THREAD_unlock(fips_state_lock);
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}
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if (st == NULL
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|| st->module_checksum_data == NULL) {
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ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_CONFIG_DATA);
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goto end;
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}
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ev = OSSL_SELF_TEST_new(st->cb, st->cb_arg);
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if (ev == NULL)
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goto end;
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module_checksum = OPENSSL_hexstr2buf(st->module_checksum_data,
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&checksum_len);
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if (module_checksum == NULL) {
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ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_CONFIG_DATA);
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goto end;
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}
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bio_module = (*st->bio_new_file_cb)(st->module_filename, "rb");
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/* Always check the integrity of the fips module */
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if (bio_module == NULL
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|| !verify_integrity(bio_module, st->bio_read_ex_cb,
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module_checksum, checksum_len, st->libctx,
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ev, OSSL_SELF_TEST_TYPE_MODULE_INTEGRITY)) {
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ERR_raise(ERR_LIB_PROV, PROV_R_MODULE_INTEGRITY_FAILURE);
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goto end;
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}
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/* This will be NULL during installation - so the self test KATS will run */
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if (st->indicator_data != NULL) {
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/*
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* If the kats have already passed indicator is set - then check the
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* integrity of the indicator.
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*/
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if (st->indicator_checksum_data == NULL) {
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ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_CONFIG_DATA);
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goto end;
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}
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indicator_checksum = OPENSSL_hexstr2buf(st->indicator_checksum_data,
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&checksum_len);
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if (indicator_checksum == NULL) {
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ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_CONFIG_DATA);
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goto end;
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}
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bio_indicator =
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(*st->bio_new_buffer_cb)(st->indicator_data,
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strlen(st->indicator_data));
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if (bio_indicator == NULL
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|| !verify_integrity(bio_indicator, st->bio_read_ex_cb,
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indicator_checksum, checksum_len,
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st->libctx, ev,
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OSSL_SELF_TEST_TYPE_INSTALL_INTEGRITY)) {
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ERR_raise(ERR_LIB_PROV, PROV_R_INDICATOR_INTEGRITY_FAILURE);
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goto end;
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} else {
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kats_already_passed = 1;
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}
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}
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/*
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* Only runs the KAT's during installation OR on_demand().
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* NOTE: If the installation option 'self_test_onload' is chosen then this
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* path will always be run, since kats_already_passed will always be 0.
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*/
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if (on_demand_test || kats_already_passed == 0) {
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if (!SELF_TEST_kats(ev, st->libctx)) {
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ERR_raise(ERR_LIB_PROV, PROV_R_SELF_TEST_KAT_FAILURE);
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goto end;
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}
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}
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ok = 1;
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end:
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OSSL_SELF_TEST_free(ev);
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OPENSSL_free(module_checksum);
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OPENSSL_free(indicator_checksum);
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if (st != NULL) {
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(*st->bio_free_cb)(bio_indicator);
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(*st->bio_free_cb)(bio_module);
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}
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if (ok)
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set_fips_state(FIPS_STATE_RUNNING);
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else
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ossl_set_error_state(OSSL_SELF_TEST_TYPE_NONE);
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CRYPTO_THREAD_unlock(self_test_lock);
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return ok;
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}
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void SELF_TEST_disable_conditional_error_state(void)
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{
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FIPS_conditional_error_check = 0;
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}
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void ossl_set_error_state(const char *type)
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{
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int cond_test = (type != NULL && strcmp(type, OSSL_SELF_TEST_TYPE_PCT) == 0);
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if (!cond_test || (FIPS_conditional_error_check == 1)) {
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set_fips_state(FIPS_STATE_ERROR);
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ERR_raise(ERR_LIB_PROV, PROV_R_FIPS_MODULE_ENTERING_ERROR_STATE);
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} else {
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ERR_raise(ERR_LIB_PROV, PROV_R_FIPS_MODULE_CONDITIONAL_ERROR);
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}
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}
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int ossl_prov_is_running(void)
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{
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int res;
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static unsigned int rate_limit = 0;
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if (!CRYPTO_THREAD_read_lock(fips_state_lock))
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return 0;
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res = FIPS_state == FIPS_STATE_RUNNING
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|| FIPS_state == FIPS_STATE_SELFTEST;
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if (FIPS_state == FIPS_STATE_ERROR) {
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CRYPTO_THREAD_unlock(fips_state_lock);
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if (!CRYPTO_THREAD_write_lock(fips_state_lock))
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return 0;
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if (rate_limit++ < FIPS_ERROR_REPORTING_RATE_LIMIT)
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ERR_raise(ERR_LIB_PROV, PROV_R_FIPS_MODULE_IN_ERROR_STATE);
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}
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CRYPTO_THREAD_unlock(fips_state_lock);
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return res;
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}
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