linuxkm/linuxkm_wc_port.h:

* move enum wc_svr_flags out of BUILDING_WOLFSSL guard;
* add DISABLE_VECTOR_REGISTERS() and REENABLE_VECTOR_REGISTERS() definitions for !BUILDING_WOLFSSL;
* add #include <linux/spinlock.h> to !WOLFSSL_LINUXKM_USE_MUTEXES implementation to fix compilation (and add usability) to caller code;

linuxkm/lkcapi_sha_glue.c: in wc_linuxkm_drbg_ctx_clear(), fix error-path deallocation of locked object;

wolfcrypt/benchmark/benchmark.c:

* in FIPS v6+ builds, and FIPS linuxkm v5+, check retval from wc_AesEncryptDirect() and wc_AesDecryptDirect();
* add WC_RELAX_LONG_LOOP() in bench_stats_sym_finish() and bench_stats_asym_finish_ex();

wolfcrypt/test/test.c: fix rng_seed_test() with correct test vectors for the relevant combinations of features, and gate the test out if there are user override defines for ENTROPY_SCALE_FACTOR or SEED_BLOCK_SZ.

linuxkm/linuxkm_wc_port.h

@@ -135,6 +135,10 @@
     #endif
     extern void wc_linuxkm_relax_long_loop(void);
 
+    enum wc_svr_flags {
+        WC_SVR_FLAG_INHIBIT = 1,
+    };
+
     #ifdef BUILDING_WOLFSSL
 
     #if ((LINUX_VERSION_CODE >= KERNEL_VERSION(5, 16, 0)) || \
@@ -453,10 +457,6 @@
     #if defined(WOLFSSL_LINUXKM_USE_SAVE_VECTOR_REGISTERS) && \
         defined(CONFIG_X86)
 
-        enum wc_svr_flags {
-            WC_SVR_FLAG_INHIBIT = 1,
-        };
-
         extern __must_check int allocate_wolfcrypt_linuxkm_fpu_states(void);
         extern void free_wolfcrypt_linuxkm_fpu_states(void);
         extern __must_check int can_save_vector_registers_x86(void);
@@ -1179,6 +1179,28 @@
 
     #endif /* BUILDING_WOLFSSL */
 
+    #if !defined(BUILDING_WOLFSSL)
+        /* some caller code needs these. */
+        #if defined(WOLFSSL_LINUXKM_USE_SAVE_VECTOR_REGISTERS)
+            #ifdef CONFIG_X86
+                extern __must_check int save_vector_registers_x86(enum wc_svr_flags flags);
+                #ifndef DISABLE_VECTOR_REGISTERS
+                    #define DISABLE_VECTOR_REGISTERS() save_vector_registers_x86(WC_SVR_FLAG_INHIBIT)
+                #endif
+                #ifndef REENABLE_VECTOR_REGISTERS
+                    #define REENABLE_VECTOR_REGISTERS() restore_vector_registers_x86()
+                #endif
+            #endif /* CONFIG_X86 */
+        #else /* !WOLFSSL_LINUXKM_USE_SAVE_VECTOR_REGISTERS */
+            #ifndef DISABLE_VECTOR_REGISTERS
+                #define DISABLE_VECTOR_REGISTERS() NOT_COMPILED_IN
+            #endif
+            #ifndef REENABLE_VECTOR_REGISTERS
+                #define REENABLE_VECTOR_REGISTERS() WC_DO_NOTHING
+            #endif
+        #endif
+    #endif /* !BUILDING_WOLFSSL */
+
     /* Copied from wc_port.h: For FIPS keep the function names the same */
     #ifdef HAVE_FIPS
     #define wc_InitMutex   InitMutex
@@ -1232,6 +1254,12 @@
             return 0;
         }
     #else
+        /* if BUILDING_WOLFSSL, spinlock.h will have already been included
+         * recursively above, with the bevy of warnings suppressed, and the
+         * below include will be a redundant no-op.
+         */
+        #include <linux/spinlock.h>
+
         typedef struct wolfSSL_Mutex {
             spinlock_t lock;
             unsigned long irq_flags;

linuxkm/lkcapi_sha_glue.c

@@ -980,6 +980,9 @@ static inline void wc_linuxkm_drbg_ctx_clear(struct wc_linuxkm_drbg_ctx * ctx)
             if (ctx->rngs[i].lock != 0) {
                 /* better to leak than to crash. */
                 pr_err("BUG: wc_linuxkm_drbg_ctx_clear called with DRBG #%d still locked.", i);
+                ctx->rngs = NULL;
+                ctx->n_rngs = 0;
+                return;
             }
             else
                 wc_FreeRng(&ctx->rngs[i].rng);

wolfcrypt/benchmark/benchmark.c

@@ -2543,6 +2543,8 @@ static void bench_stats_sym_finish(const char* desc, int useDeviceID,
 
     total = current_time(0) - start;
 
+    WC_RELAX_LONG_LOOP();
+
 #if defined(WOLFSSL_ESPIDF) && defined(DEBUG_WOLFSSL_BENCHMARK_TIMING)
     ESP_LOGI(TAG, "%s total_cycles = %llu", desc, total_cycles);
 #endif
@@ -2773,6 +2775,8 @@ static void bench_stats_asym_finish_ex(const char* algo, int strength,
 
     total = current_time(0) - start;
 
+    WC_RELAX_LONG_LOOP();
+
 #ifdef LINUX_RUSAGE_UTIME
     check_for_excessive_stime(algo, strength, desc, desc_extra);
 #endif
@@ -5010,7 +5014,13 @@ static void bench_aesecb_internal(int useDeviceID,
                 if (bench_async_check(&ret, BENCH_ASYNC_GET_DEV(enc[i]), 0,
                                       &times, outer_loop_limit, &pending)) {
                 #ifdef HAVE_FIPS
+                    #if defined(WOLFSSL_LINUXKM) || FIPS_VERSION_GE(6, 0)
+                    ret = wc_AesEncryptDirect(enc[i], bench_cipher, bench_plain);
+                    if (ret != 0)
+                        goto exit_aes_enc;
+                    #else
                     wc_AesEncryptDirect(enc[i], bench_cipher, bench_plain);
+                    #endif
                 #else
                     wc_AesEcbEncrypt(enc[i], bench_cipher, bench_plain,
                         benchSz);
@@ -5061,7 +5071,13 @@ exit_aes_enc:
                 if (bench_async_check(&ret, BENCH_ASYNC_GET_DEV(enc[i]), 0,
                                       &times, outer_loop_limit, &pending)) {
                 #ifdef HAVE_FIPS
+                    #if defined(WOLFSSL_LINUXKM) || FIPS_VERSION_GE(6, 0)
+                    ret = wc_AesDecryptDirect(enc[i], bench_plain, bench_cipher);
+                    if (ret != 0)
+                        goto exit_aes_dec;
+                    #else
                     wc_AesDecryptDirect(enc[i], bench_plain, bench_cipher);
+                    #endif
                 #else
                     wc_AesEcbDecrypt(enc[i], bench_plain, bench_cipher,
                         benchSz);

wolfcrypt/test/test.c

@@ -18352,7 +18352,8 @@ static wc_test_ret_t random_rng_test(void)
 
 #if defined(HAVE_HASHDRBG) && !defined(CUSTOM_RAND_GENERATE_BLOCK)
 
-#ifdef WC_RNG_SEED_CB
+#if defined(WC_RNG_SEED_CB) && \
+    !(defined(ENTROPY_SCALE_FACTOR) || defined(SEED_BLOCK_SZ))
 static int seed_cb(OS_Seed* os, byte* output, word32 sz)
 {
     word32 i;
@@ -18365,16 +18366,73 @@ static int seed_cb(OS_Seed* os, byte* output, word32 sz)
 
 static wc_test_ret_t rng_seed_test(void)
 {
-#ifndef HAVE_FIPS
+    /* The expected PRNG block depends on ENTROPY_SCALE_FACTOR and
+     * SEED_BLOCK_SZ, which depend on which seed back end is configured.
+     */
+#if defined(HAVE_ENTROPY_MEMUSE) && defined(HAVE_AMD_RDSEED)
+    #ifdef HAVE_FIPS
     WOLFSSL_SMALL_STACK_STATIC const byte check[] =
     {
-        0x83, 0x46, 0x65, 0x2f, 0x5c, 0x44, 0x16, 0x5f,
-        0xb3, 0x89, 0x26, 0xde, 0x0b, 0x6b, 0xa2, 0x06,
-        0x7e, 0xa7, 0x9a, 0x55, 0x22, 0x01, 0xb0, 0x22,
-        0xf4, 0x7e, 0xa2, 0x66, 0xc4, 0x08, 0x6f, 0xba
+        0x35, 0x1e, 0xf9, 0xe8, 0x6b, 0x19, 0xe0, 0xe5,
+        0x32, 0xb3, 0x41, 0xe5, 0xc1, 0x35, 0x18, 0x35,
+        0x84, 0x2a, 0x3f, 0x84, 0x16, 0xc4, 0xf3, 0x50,
+        0xdd, 0x4b, 0xeb, 0xe4, 0xcd, 0xbe, 0x94, 0x84
     };
-#else
-    /* FIPS uses a longer seed, so different check value. */
+    #else
+    WOLFSSL_SMALL_STACK_STATIC const byte check[] =
+    {
+        0xb8, 0x3e, 0x23, 0xad, 0x34, 0xb6, 0x1e, 0xc7,
+        0x0f, 0xa6, 0x4a, 0x45, 0x12, 0x66, 0xfd, 0x4d,
+        0x97, 0xb2, 0x3d, 0xb3, 0xda, 0xcc, 0xed, 0x50,
+        0x2e, 0xe0, 0x51, 0x38, 0x1d, 0x0f, 0x81, 0x35
+    };
+    #endif
+#elif defined(HAVE_ENTROPY_MEMUSE) && \
+    (defined(HAVE_INTEL_RDSEED) || defined(HAVE_INTEL_RDRAND))
+    #ifdef HAVE_FIPS
+    WOLFSSL_SMALL_STACK_STATIC const byte check[] =
+    {
+        0xba, 0xc3, 0x2f, 0xcf, 0xd2, 0x0e, 0xe1, 0x16,
+        0x45, 0xdc, 0xc2, 0x87, 0x0d, 0x70, 0xde, 0x5e,
+        0x2e, 0x2f, 0x0c, 0x7a, 0x1d, 0x04, 0x89, 0x0d,
+        0x0b, 0x9a, 0x51, 0x00, 0x4f, 0x7e, 0xce, 0xd6
+    };
+    #else
+    WOLFSSL_SMALL_STACK_STATIC const byte check[] =
+    {
+        0xa6, 0xfa, 0x3e, 0xb7, 0x66, 0x85, 0x96, 0x79,
+        0xef, 0x91, 0x26, 0xa1, 0xe8, 0x71, 0xa7, 0x13,
+        0x03, 0xea, 0xe5, 0x7b, 0x36, 0x52, 0x02, 0x39,
+        0x83, 0xbf, 0x41, 0xd1, 0x3e, 0x8f, 0xc0, 0x45
+    };
+    #endif
+#elif defined(HAVE_AMD_RDSEED)
+    WOLFSSL_SMALL_STACK_STATIC const byte check[] =
+    {
+        0x2c, 0xd4, 0x9b, 0x1e, 0x1e, 0xe7, 0xb0, 0xb0,
+        0xf9, 0xa0, 0xa9, 0xd5, 0x8d, 0xf9, 0x6d, 0x10,
+        0xf4, 0x77, 0xaf, 0xac, 0x3d, 0x2f, 0x6b, 0x1f,
+        0xa2, 0xe7, 0xe5, 0x90, 0x6d, 0x1f, 0x88, 0x98
+    };
+#elif defined(HAVE_INTEL_RDSEED) || defined(HAVE_INTEL_RDRAND)
+    #ifdef HAVE_FIPS
+    WOLFSSL_SMALL_STACK_STATIC const byte check[] =
+    {
+        0x27, 0xdd, 0xff, 0x5b, 0x21, 0x26, 0x0a, 0x48,
+        0xb3, 0x6b, 0xd8, 0x14, 0x00, 0x55, 0xe8, 0x39,
+        0x6d, 0x31, 0xf3, 0x6e, 0xe7, 0xbf, 0xce, 0x08,
+        0x1f, 0x61, 0x73, 0xe6, 0x3c, 0xb9, 0x12, 0xea
+    };
+    #else
+    WOLFSSL_SMALL_STACK_STATIC const byte check[] =
+    {
+        0x3b, 0x9d, 0x0d, 0xc8, 0x0e, 0xb4, 0x33, 0x0b,
+        0x50, 0x5f, 0x3a, 0xee, 0xc8, 0x68, 0x8d, 0x9f,
+        0xdf, 0x39, 0x06, 0x78, 0xf8, 0x6a, 0xd6, 0xc6,
+        0xd7, 0x63, 0x57, 0xe8, 0x6d, 0xf7, 0xc8, 0x6b
+    };
+    #endif
+#elif defined(HAVE_FIPS)
     WOLFSSL_SMALL_STACK_STATIC const byte check[] =
     {
         0xaf, 0x31, 0xcc, 0xef, 0xa9, 0x29, 0x4c, 0x24,
@@ -18382,6 +18440,14 @@ static wc_test_ret_t rng_seed_test(void)
         0x1e, 0xd4, 0x52, 0x3b, 0x9a, 0x96, 0x06, 0x20,
         0xc0, 0x5f, 0x44, 0x06, 0x1f, 0x80, 0xdf, 0xe0
     };
+#else
+    WOLFSSL_SMALL_STACK_STATIC const byte check[] =
+    {
+        0x83, 0x46, 0x65, 0x2f, 0x5c, 0x44, 0x16, 0x5f,
+        0xb3, 0x89, 0x26, 0xde, 0x0b, 0x6b, 0xa2, 0x06,
+        0x7e, 0xa7, 0x9a, 0x55, 0x22, 0x01, 0xb0, 0x22,
+        0xf4, 0x7e, 0xa2, 0x66, 0xc4, 0x08, 0x6f, 0xba
+    };
 #endif
     byte output[WC_SHA256_DIGEST_SIZE];
     WC_RNG rng;
@@ -18415,7 +18481,7 @@ static wc_test_ret_t rng_seed_test(void)
 out:
     return ret;
 }
-#endif
+#endif /* WC_RNG_SEED_CB) && !(ENTROPY_SCALE_FACTOR || SEED_BLOCK_SZ) */
 
 
 WOLFSSL_TEST_SUBROUTINE wc_test_ret_t random_test(void)
@@ -18526,7 +18592,8 @@ WOLFSSL_TEST_SUBROUTINE wc_test_ret_t random_test(void)
 #endif
 
     /* Test the seed callback. */
-#ifdef WC_RNG_SEED_CB
+#if defined(WC_RNG_SEED_CB) && \
+    !(defined(ENTROPY_SCALE_FACTOR) || defined(SEED_BLOCK_SZ))
     if ((ret = rng_seed_test()) != 0)
         return ret;
 #endif