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wolfssl-w32/linuxkm/module_hooks.c

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/* module_hooks.c -- module load/unload hooks for libwolfssl.ko
*
* Copyright (C) 2006-2023 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
#ifndef WOLFSSL_LICENSE
#define WOLFSSL_LICENSE "GPL v2"
#endif
#define FIPS_NO_WRAPPERS
#define WOLFSSL_NEED_LINUX_CURRENT
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <wolfssl/wolfcrypt/settings.h>
#include <wolfssl/wolfcrypt/error-crypt.h>
#ifdef WOLFCRYPT_ONLY
#include <wolfssl/version.h>
#else
#include <wolfssl/ssl.h>
#endif
#ifdef HAVE_FIPS
#include <wolfssl/wolfcrypt/fips_test.h>
#endif
#ifndef NO_CRYPT_TEST
#include <wolfcrypt/test/test.h>
#include <linux/delay.h>
#endif
static int libwolfssl_cleanup(void) {
int ret;
#ifdef WOLFCRYPT_ONLY
ret = wolfCrypt_Cleanup();
if (ret != 0)
pr_err("wolfCrypt_Cleanup() failed: %s\n", wc_GetErrorString(ret));
else
pr_info("wolfCrypt " LIBWOLFSSL_VERSION_STRING " cleanup complete.\n");
#else
ret = wolfSSL_Cleanup();
if (ret != WOLFSSL_SUCCESS)
pr_err("wolfSSL_Cleanup() failed: %s\n", wc_GetErrorString(ret));
else
pr_info("wolfSSL " LIBWOLFSSL_VERSION_STRING " cleanup complete.\n");
#endif
return ret;
}
#ifdef HAVE_LINUXKM_PIE_SUPPORT
extern int wolfCrypt_PIE_first_function(void);
extern int wolfCrypt_PIE_last_function(void);
extern const unsigned int wolfCrypt_PIE_rodata_start[];
extern const unsigned int wolfCrypt_PIE_rodata_end[];
/* cheap portable ad-hoc hash function to confirm bitwise stability of the PIE
* binary image.
*/
static unsigned int hash_span(char *start, char *end) {
unsigned int sum = 1;
while (start < end) {
unsigned int rotate_by;
sum ^= *start++;
rotate_by = (sum ^ (sum >> 5)) & 31;
sum = (sum << rotate_by) | (sum >> (32 - rotate_by));
}
return sum;
}
#ifdef USE_WOLFSSL_LINUXKM_PIE_REDIRECT_TABLE
extern struct wolfssl_linuxkm_pie_redirect_table wolfssl_linuxkm_pie_redirect_table;
static int set_up_wolfssl_linuxkm_pie_redirect_table(void);
#endif /* USE_WOLFSSL_LINUXKM_PIE_REDIRECT_TABLE */
#endif /* HAVE_LINUXKM_PIE_SUPPORT */
#ifdef HAVE_FIPS
static void lkmFipsCb(int ok, int err, const char* hash)
{
if ((! ok) || (err != 0))
pr_err("libwolfssl FIPS error: %s\n", wc_GetErrorString(err));
if (err == IN_CORE_FIPS_E) {
pr_err("In-core integrity hash check failure.\n"
"Update verifyCore[] in fips_test.c with new hash \"%s\" and rebuild.\n",
hash ? hash : "<null>");
}
}
#endif
#ifdef WOLFCRYPT_FIPS_CORE_DYNAMIC_HASH_VALUE
#ifndef CONFIG_MODULE_SIG
#error WOLFCRYPT_FIPS_CORE_DYNAMIC_HASH_VALUE requires a CONFIG_MODULE_SIG kernel.
#endif
static int updateFipsHash(void);
#endif
#ifdef WOLFSSL_LINUXKM_BENCHMARKS
#undef HAVE_PTHREAD
#define STRING_USER
#define NO_MAIN_FUNCTION
#define current_time benchmark_current_time
#define WOLFSSL_NO_FLOAT_FMT
#include "wolfcrypt/benchmark/benchmark.c"
#endif /* WOLFSSL_LINUXKM_BENCHMARKS */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 0, 0)
static int __init wolfssl_init(void)
#else
static int wolfssl_init(void)
#endif
{
int ret;
#ifdef WOLFCRYPT_FIPS_CORE_DYNAMIC_HASH_VALUE
if (THIS_MODULE->sig_ok == false) {
pr_err("wolfSSL module load aborted -- bad or missing module signature with FIPS dynamic hash.\n");
return -ECANCELED;
}
ret = updateFipsHash();
if (ret < 0) {
pr_err("wolfSSL module load aborted -- updateFipsHash: %s\n",wc_GetErrorString(ret));
return -ECANCELED;
}
#endif
#ifdef USE_WOLFSSL_LINUXKM_PIE_REDIRECT_TABLE
ret = set_up_wolfssl_linuxkm_pie_redirect_table();
if (ret < 0)
return ret;
#endif
#ifdef HAVE_LINUXKM_PIE_SUPPORT
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 4, 0)
/* see linux commit ac3b432839 */
#define THIS_MODULE_TEXT_BASE (THIS_MODULE->mem[MOD_TEXT].base)
#define THIS_MODULE_TEXT_SIZE (THIS_MODULE->mem[MOD_TEXT].size)
#define THIS_MODULE_RO_BASE (THIS_MODULE->mem[MOD_RODATA].base)
#define THIS_MODULE_RO_SIZE (THIS_MODULE->mem[MOD_RODATA].size)
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 5, 0)
#define THIS_MODULE_TEXT_BASE (THIS_MODULE->core_layout.base)
#define THIS_MODULE_TEXT_SIZE (THIS_MODULE->core_layout.text_size)
#define THIS_MODULE_RO_BASE ((char *)THIS_MODULE->core_layout.base + THIS_MODULE->core_layout.text_size)
#define THIS_MODULE_RO_SIZE (THIS_MODULE->core_layout.ro_size)
#else
#define THIS_MODULE_TEXT_BASE (THIS_MODULE->module_core)
#define THIS_MODULE_TEXT_SIZE (THIS_MODULE->core_text_size)
#define THIS_MODULE_RO_BASE ((char *)THIS_MODULE->module_core + THIS_MODULE->core_ro_size)
#define THIS_MODULE_RO_SIZE (THIS_MODULE->core_ro_size)
#endif
{
char *pie_text_start = (char *)wolfCrypt_PIE_first_function;
char *pie_text_end = (char *)wolfCrypt_PIE_last_function;
char *pie_rodata_start = (char *)wolfCrypt_PIE_rodata_start;
char *pie_rodata_end = (char *)wolfCrypt_PIE_rodata_end;
unsigned int text_hash, rodata_hash;
if ((pie_text_start < pie_text_end) &&
(pie_text_start >= (char *)THIS_MODULE_TEXT_BASE) &&
(pie_text_end - (char *)THIS_MODULE_TEXT_BASE <= THIS_MODULE_TEXT_SIZE))
{
text_hash = hash_span(pie_text_start, pie_text_end);
} else {
pr_info("out-of-bounds PIE fenceposts! pie_text_start=%px pie_text_end=%px (span=%lu)"
" core_layout.base=%px text_end=%px\n",
pie_text_start,
pie_text_end,
pie_text_end-pie_text_start,
THIS_MODULE_TEXT_BASE,
(char *)THIS_MODULE_TEXT_BASE + THIS_MODULE_TEXT_SIZE);
text_hash = 0;
}
if ((pie_rodata_start < pie_rodata_end) && // cppcheck-suppress comparePointers
(pie_rodata_start >= (char *)THIS_MODULE_RO_BASE) &&
(pie_rodata_end - (char *)THIS_MODULE_RO_BASE <= THIS_MODULE_RO_SIZE))
{
rodata_hash = hash_span(pie_rodata_start, pie_rodata_end);
} else {
pr_info("out-of-bounds PIE fenceposts! pie_rodata_start=%px pie_rodata_end=%px (span=%lu)"
" core_layout.base+core_layout.text_size=%px rodata_end=%px\n",
pie_rodata_start,
pie_rodata_end,
pie_rodata_end-pie_rodata_start,
(char *)THIS_MODULE_RO_BASE,
(char *)THIS_MODULE_RO_BASE + THIS_MODULE_RO_SIZE);
rodata_hash = 0;
}
/* note, "%pK" conceals the actual layout information. "%px" exposes
* the true module start address, which is potentially useful to an
* attacker.
*/
pr_info("wolfCrypt container hashes (spans): text 0x%x (%lu), rodata 0x%x (%lu)\n",
text_hash, pie_text_end-pie_text_start,
rodata_hash, pie_rodata_end-pie_rodata_start);
}
#endif /* HAVE_LINUXKM_PIE_SUPPORT */
#ifdef HAVE_FIPS
ret = wolfCrypt_SetCb_fips(lkmFipsCb);
if (ret != 0) {
pr_err("wolfCrypt_SetCb_fips() failed: %s\n", wc_GetErrorString(ret));
return -ECANCELED;
}
fipsEntry();
ret = wolfCrypt_GetStatus_fips();
if (ret != 0) {
pr_err("wolfCrypt_GetStatus_fips() failed: %s\n", wc_GetErrorString(ret));
if (ret == IN_CORE_FIPS_E) {
const char *newhash = wolfCrypt_GetCoreHash_fips();
pr_err("Update verifyCore[] in fips_test.c with new hash \"%s\" and rebuild.\n",
newhash ? newhash : "<null>");
}
return -ECANCELED;
}
pr_info("wolfCrypt FIPS ["
#if defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION == 3)
"ready"
#elif defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION == 2) \
&& defined(WOLFCRYPT_FIPS_RAND)
"140-2 rand"
#elif defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION == 2)
"140-2"
#else
"140"
#endif
"] POST succeeded.\n");
#endif /* HAVE_FIPS */
#ifdef WC_RNG_SEED_CB
ret = wc_SetSeed_Cb(wc_GenerateSeed);
if (ret < 0) {
pr_err("wc_SetSeed_Cb() failed with return code %d.\n", ret);
(void)libwolfssl_cleanup();
msleep(10);
return -ECANCELED;
}
#endif
#ifdef WOLFCRYPT_ONLY
ret = wolfCrypt_Init();
if (ret != 0) {
pr_err("wolfCrypt_Init() failed: %s\n", wc_GetErrorString(ret));
return -ECANCELED;
}
#else
ret = wolfSSL_Init();
if (ret != WOLFSSL_SUCCESS) {
pr_err("wolfSSL_Init() failed: %s\n", wc_GetErrorString(ret));
return -ECANCELED;
}
#endif
#ifndef NO_CRYPT_TEST
ret = wolfcrypt_test(NULL);
if (ret < 0) {
pr_err("wolfcrypt self-test failed with return code %d.\n", ret);
(void)libwolfssl_cleanup();
msleep(10);
return -ECANCELED;
}
pr_info("wolfCrypt self-test passed.\n");
#endif
#ifdef WOLFSSL_LINUXKM_BENCHMARKS
wolfcrypt_benchmark_main(0, (char**)NULL);
#endif
#ifdef WOLFCRYPT_ONLY
pr_info("wolfCrypt " LIBWOLFSSL_VERSION_STRING " loaded%s"
".\nSee https://www.wolfssl.com/ for more information.\n"
"wolfCrypt Copyright (C) 2006-present wolfSSL Inc. Licensed under " WOLFSSL_LICENSE ".\n",
#ifdef CONFIG_MODULE_SIG
THIS_MODULE->sig_ok ? " with valid module signature" : " without valid module signature"
#else
""
#endif
);
#else
pr_info("wolfSSL " LIBWOLFSSL_VERSION_STRING " loaded%s"
".\nSee https://www.wolfssl.com/ for more information.\n"
"wolfSSL Copyright (C) 2006-present wolfSSL Inc. Licensed under " WOLFSSL_LICENSE ".\n",
#ifdef CONFIG_MODULE_SIG
THIS_MODULE->sig_ok ? " with valid module signature" : " without valid module signature"
#else
""
#endif
);
#endif
return 0;
}
module_init(wolfssl_init);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 0, 0)
static void __exit wolfssl_exit(void)
#else
static void wolfssl_exit(void)
#endif
{
(void)libwolfssl_cleanup();
return;
}
module_exit(wolfssl_exit);
MODULE_LICENSE(WOLFSSL_LICENSE);
MODULE_AUTHOR("https://www.wolfssl.com/");
MODULE_DESCRIPTION("libwolfssl cryptographic and protocol facilities");
MODULE_VERSION(LIBWOLFSSL_VERSION_STRING);
#ifdef USE_WOLFSSL_LINUXKM_PIE_REDIRECT_TABLE
/* get_current() is an inline or macro, depending on the target -- sidestep the whole issue with a wrapper func. */
static struct task_struct *my_get_current_thread(void) {
return get_current();
}
/* ditto for preempt_count(). */
static int my_preempt_count(void) {
return preempt_count();
}
static int set_up_wolfssl_linuxkm_pie_redirect_table(void) {
memset(
&wolfssl_linuxkm_pie_redirect_table,
0,
sizeof wolfssl_linuxkm_pie_redirect_table);
#ifndef __ARCH_MEMCMP_NO_REDIRECT
wolfssl_linuxkm_pie_redirect_table.memcmp = memcmp;
#endif
#ifndef __ARCH_MEMCPY_NO_REDIRECT
wolfssl_linuxkm_pie_redirect_table.memcpy = memcpy;
#endif
#ifndef __ARCH_MEMSET_NO_REDIRECT
wolfssl_linuxkm_pie_redirect_table.memset = memset;
#endif
#ifndef __ARCH_MEMMOVE_NO_REDIRECT
wolfssl_linuxkm_pie_redirect_table.memmove = memmove;
#endif
#ifndef __ARCH_STRCMP_NO_REDIRECT
wolfssl_linuxkm_pie_redirect_table.strcmp = strcmp;
#endif
#ifndef __ARCH_STRNCMP_NO_REDIRECT
wolfssl_linuxkm_pie_redirect_table.strncmp = strncmp;
#endif
#ifndef __ARCH_STRCASECMP_NO_REDIRECT
wolfssl_linuxkm_pie_redirect_table.strcasecmp = strcasecmp;
#endif
#ifndef __ARCH_STRNCASECMP_NO_REDIRECT
wolfssl_linuxkm_pie_redirect_table.strncasecmp = strncasecmp;
#endif
#ifndef __ARCH_STRLEN_NO_REDIRECT
wolfssl_linuxkm_pie_redirect_table.strlen = strlen;
#endif
#ifndef __ARCH_STRSTR_NO_REDIRECT
wolfssl_linuxkm_pie_redirect_table.strstr = strstr;
#endif
#ifndef __ARCH_STRNCPY_NO_REDIRECT
wolfssl_linuxkm_pie_redirect_table.strncpy = strncpy;
#endif
#ifndef __ARCH_STRNCAT_NO_REDIRECT
wolfssl_linuxkm_pie_redirect_table.strncat = strncat;
#endif
wolfssl_linuxkm_pie_redirect_table.kstrtoll = kstrtoll;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 15, 0)
wolfssl_linuxkm_pie_redirect_table._printk = _printk;
#else
wolfssl_linuxkm_pie_redirect_table.printk = printk;
#endif
wolfssl_linuxkm_pie_redirect_table.snprintf = snprintf;
wolfssl_linuxkm_pie_redirect_table._ctype = _ctype;
wolfssl_linuxkm_pie_redirect_table.kmalloc = kmalloc;
wolfssl_linuxkm_pie_redirect_table.kfree = kfree;
wolfssl_linuxkm_pie_redirect_table.ksize = ksize;
wolfssl_linuxkm_pie_redirect_table.krealloc = krealloc;
#ifdef HAVE_KVMALLOC
wolfssl_linuxkm_pie_redirect_table.kvmalloc_node = kvmalloc_node;
wolfssl_linuxkm_pie_redirect_table.kvfree = kvfree;
#endif
wolfssl_linuxkm_pie_redirect_table.is_vmalloc_addr = is_vmalloc_addr;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 1, 0)
wolfssl_linuxkm_pie_redirect_table.kmalloc_trace =
kmalloc_trace;
#else
wolfssl_linuxkm_pie_redirect_table.kmem_cache_alloc_trace =
kmem_cache_alloc_trace;
wolfssl_linuxkm_pie_redirect_table.kmalloc_order_trace =
kmalloc_order_trace;
#endif
wolfssl_linuxkm_pie_redirect_table.get_random_bytes = get_random_bytes;
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 0, 0)
wolfssl_linuxkm_pie_redirect_table.getnstimeofday =
getnstimeofday;
#elif LINUX_VERSION_CODE < KERNEL_VERSION(5, 0, 0)
wolfssl_linuxkm_pie_redirect_table.current_kernel_time64 =
current_kernel_time64;
#else
wolfssl_linuxkm_pie_redirect_table.ktime_get_coarse_real_ts64 =
ktime_get_coarse_real_ts64;
#endif
wolfssl_linuxkm_pie_redirect_table.get_current = my_get_current_thread;
wolfssl_linuxkm_pie_redirect_table.preempt_count = my_preempt_count;
#ifdef WOLFSSL_LINUXKM_USE_SAVE_VECTOR_REGISTERS
#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0)
wolfssl_linuxkm_pie_redirect_table.cpu_number = &cpu_number;
#else
wolfssl_linuxkm_pie_redirect_table.pcpu_hot = &pcpu_hot;
#endif
wolfssl_linuxkm_pie_redirect_table.nr_cpu_ids = &nr_cpu_ids;
#if defined(CONFIG_SMP) && (LINUX_VERSION_CODE >= KERNEL_VERSION(5, 7, 0))
wolfssl_linuxkm_pie_redirect_table.migrate_disable = &migrate_disable;
wolfssl_linuxkm_pie_redirect_table.migrate_enable = &migrate_enable;
#endif
#ifdef WOLFSSL_LINUXKM_SIMD_X86
wolfssl_linuxkm_pie_redirect_table.irq_fpu_usable = irq_fpu_usable;
#ifdef kernel_fpu_begin
wolfssl_linuxkm_pie_redirect_table.kernel_fpu_begin_mask =
kernel_fpu_begin_mask;
#else
wolfssl_linuxkm_pie_redirect_table.kernel_fpu_begin =
kernel_fpu_begin;
#endif
wolfssl_linuxkm_pie_redirect_table.kernel_fpu_end = kernel_fpu_end;
#endif /* WOLFSSL_LINUXKM_SIMD_X86 */
#endif /* WOLFSSL_LINUXKM_USE_SAVE_VECTOR_REGISTERS */
wolfssl_linuxkm_pie_redirect_table.__mutex_init = __mutex_init;
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 0, 0)
wolfssl_linuxkm_pie_redirect_table.mutex_lock_nested = mutex_lock_nested;
#else
wolfssl_linuxkm_pie_redirect_table.mutex_lock = mutex_lock;
#endif
wolfssl_linuxkm_pie_redirect_table.mutex_unlock = mutex_unlock;
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 0, 0)
wolfssl_linuxkm_pie_redirect_table.mutex_destroy = mutex_destroy;
#endif
#ifdef HAVE_FIPS
wolfssl_linuxkm_pie_redirect_table.wolfCrypt_FIPS_first =
wolfCrypt_FIPS_first;
wolfssl_linuxkm_pie_redirect_table.wolfCrypt_FIPS_last =
wolfCrypt_FIPS_last;
#endif
#if !defined(WOLFCRYPT_ONLY) && !defined(NO_CERTS)
wolfssl_linuxkm_pie_redirect_table.GetCA = GetCA;
#ifndef NO_SKID
wolfssl_linuxkm_pie_redirect_table.GetCAByName = GetCAByName;
#endif
#endif
/* runtime assert that the table has no null slots after initialization. */
{
unsigned long *i;
for (i = (unsigned long *)&wolfssl_linuxkm_pie_redirect_table;
i < (unsigned long *)&wolfssl_linuxkm_pie_redirect_table._last_slot;
++i)
if (*i == 0) {
pr_err("wolfCrypt container redirect table initialization was incomplete.\n");
return -EFAULT;
}
}
return 0;
}
#endif /* USE_WOLFSSL_LINUXKM_PIE_REDIRECT_TABLE */
#ifdef WOLFCRYPT_FIPS_CORE_DYNAMIC_HASH_VALUE
#include <wolfssl/wolfcrypt/coding.h>
PRAGMA_GCC_DIAG_PUSH
PRAGMA_GCC("GCC diagnostic ignored \"-Wnested-externs\"")
PRAGMA_GCC("GCC diagnostic ignored \"-Wpointer-arith\"")
#include <crypto/hash.h>
PRAGMA_GCC_DIAG_POP
extern char verifyCore[WC_SHA256_DIGEST_SIZE*2 + 1];
extern const char coreKey[WC_SHA256_DIGEST_SIZE*2 + 1];
extern const unsigned int wolfCrypt_FIPS_ro_start[];
extern const unsigned int wolfCrypt_FIPS_ro_end[];
#define FIPS_IN_CORE_KEY_SZ 32
#define FIPS_IN_CORE_VERIFY_SZ FIPS_IN_CORE_KEY_SZ
typedef int (*fips_address_function)(void);
#define MAX_FIPS_DATA_SZ 100000
#define MAX_FIPS_CODE_SZ 1000000
extern int GenBase16_Hash(const byte* in, int length, char* out, int outSz);
static int updateFipsHash(void)
{
struct crypto_shash *tfm = NULL;
struct shash_desc *desc = NULL;
word32 verifySz = FIPS_IN_CORE_VERIFY_SZ;
word32 binCoreSz = FIPS_IN_CORE_KEY_SZ;
int ret;
byte *hash = NULL;
char *base16_hash = NULL;
byte *binCoreKey = NULL;
byte *binVerify = NULL;
fips_address_function first = wolfCrypt_FIPS_first;
fips_address_function last = wolfCrypt_FIPS_last;
char* start = (char*)wolfCrypt_FIPS_ro_start;
char* end = (char*)wolfCrypt_FIPS_ro_end;
unsigned long code_sz = (unsigned long)last - (unsigned long)first;
unsigned long data_sz = (unsigned long)end - (unsigned long)start;
if (data_sz == 0 || data_sz > MAX_FIPS_DATA_SZ)
return BAD_FUNC_ARG; /* bad fips data size */
if (code_sz == 0 || code_sz > MAX_FIPS_CODE_SZ)
return BAD_FUNC_ARG; /* bad fips code size */
hash = XMALLOC(WC_SHA256_DIGEST_SIZE, 0, DYNAMIC_TYPE_TMP_BUFFER);
if (hash == NULL) {
ret = MEMORY_E;
goto out;
}
base16_hash = XMALLOC(WC_SHA256_DIGEST_SIZE*2 + 1, 0, DYNAMIC_TYPE_TMP_BUFFER);
if (base16_hash == NULL) {
ret = MEMORY_E;
goto out;
}
binCoreKey = XMALLOC(binCoreSz, 0, DYNAMIC_TYPE_TMP_BUFFER);
if (binCoreKey == NULL) {
ret = MEMORY_E;
goto out;
}
binVerify = XMALLOC(verifySz, 0, DYNAMIC_TYPE_TMP_BUFFER);
if (binVerify == NULL) {
ret = MEMORY_E;
goto out;
}
{
word32 base16_out_len = binCoreSz;
ret = Base16_Decode((const byte *)coreKey, sizeof coreKey - 1, binCoreKey, &base16_out_len);
if (ret != 0) {
pr_err("Base16_Decode for coreKey: %s\n", wc_GetErrorString(ret));
goto out;
}
if (base16_out_len != binCoreSz) {
pr_err("unexpected output length %u for coreKey from Base16_Decode.\n",base16_out_len);
ret = BAD_STATE_E;
goto out;
}
}
tfm = crypto_alloc_shash("hmac(sha256)", 0, 0);
if (IS_ERR(tfm)) {
if (PTR_ERR(tfm) == -ENOMEM) {
pr_err("crypto_alloc_shash failed: out of memory\n");
ret = MEMORY_E;
} else if (PTR_ERR(tfm) == -ENOENT) {
pr_err("crypto_alloc_shash failed: kernel is missing hmac(sha256) implementation\n");
pr_err("check for CONFIG_CRYPTO_SHA256 and CONFIG_CRYPTO_HMAC.\n");
ret = NOT_COMPILED_IN;
} else {
pr_err("crypto_alloc_shash failed with ret %ld\n",PTR_ERR(tfm));
ret = HASH_TYPE_E;
}
tfm = NULL;
goto out;
}
{
size_t desc_size = crypto_shash_descsize(tfm) + sizeof *desc;
desc = XMALLOC(desc_size, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (desc == NULL) {
pr_err("failed allocating desc.");
ret = MEMORY_E;
goto out;
}
XMEMSET(desc, 0, desc_size);
}
ret = crypto_shash_setkey(tfm, binCoreKey, binCoreSz);
if (ret) {
pr_err("crypto_ahash_setkey failed: err %d\n", ret);
ret = BAD_STATE_E;
goto out;
}
desc->tfm = tfm;
ret = crypto_shash_init(desc);
if (ret) {
pr_err("crypto_shash_init failed: err %d\n", ret);
ret = BAD_STATE_E;
goto out;
}
ret = crypto_shash_update(desc, (byte *)(wc_ptr_t)first, (word32)code_sz);
if (ret) {
pr_err("crypto_shash_update failed: err %d\n", ret);
ret = BAD_STATE_E;
goto out;
}
/* don't hash verifyCore or changing verifyCore will change hash */
if (verifyCore >= start && verifyCore < end) {
data_sz = (unsigned long)verifyCore - (unsigned long)start;
ret = crypto_shash_update(desc, (byte*)start, (word32)data_sz);
if (ret) {
pr_err("crypto_shash_update failed: err %d\n", ret);
ret = BAD_STATE_E;
goto out;
}
start = (char*)verifyCore + sizeof(verifyCore);
data_sz = (unsigned long)end - (unsigned long)start;
}
ret = crypto_shash_update(desc, (byte*)start, (word32)data_sz);
if (ret) {
pr_err("crypto_shash_update failed: err %d\n", ret);
ret = BAD_STATE_E;
goto out;
}
ret = crypto_shash_final(desc, hash);
if (ret) {
pr_err("crypto_shash_final failed: err %d\n", ret);
ret = BAD_STATE_E;
goto out;
}
ret = GenBase16_Hash(hash, WC_SHA256_DIGEST_SIZE, base16_hash, WC_SHA256_DIGEST_SIZE*2 + 1);
if (ret != 0) {
pr_err("GenBase16_Hash failed: %s\n", wc_GetErrorString(ret));
goto out;
}
{
word32 base16_out_len = verifySz;
ret = Base16_Decode((const byte *)verifyCore, sizeof verifyCore - 1, binVerify, &base16_out_len);
if (ret != 0) {
pr_err("Base16_Decode for verifyCore: %s\n", wc_GetErrorString(ret));
goto out;
}
if (base16_out_len != binCoreSz) {
pr_err("unexpected output length %u for verifyCore from Base16_Decode.\n",base16_out_len);
ret = BAD_STATE_E;
goto out;
}
}
if (XMEMCMP(hash, binVerify, WC_SHA256_DIGEST_SIZE) == 0)
pr_info("updateFipsHash: verifyCore already matches.\n");
else {
XMEMCPY(verifyCore, base16_hash, WC_SHA256_DIGEST_SIZE*2 + 1);
pr_info("updateFipsHash: verifyCore updated.\n");
}
ret = 0;
out:
if (tfm != NULL)
crypto_free_shash(tfm);
if (desc != NULL)
XFREE(desc, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (hash != NULL)
XFREE(hash, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (base16_hash != NULL)
XFREE(base16_hash, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (binCoreKey != NULL)
XFREE(binCoreKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (binVerify != NULL)
XFREE(binVerify, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return ret;
}
#endif /* WOLFCRYPT_FIPS_CORE_DYNAMIC_HASH_VALUE */
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