Add support for the Infineon/Cypress HAL TRNG.

IDE/Infineon/user_settings.h

@@ -37,6 +37,8 @@ extern "C" {
 #define NO_WRITEV
 #define NO_MAIN_DRIVER
 #define WOLFSSL_IGNORE_FILE_WARN /* ignore file include warnings */
+#define WOLFSSL_SMALL_STACK /* limit stack usage */
+#define BENCH_EMBEDDED
 
 /* TLS (allow TLS v1.3 or v1.2) */
 #define WOLFSSL_TLS13
@@ -132,6 +134,13 @@ extern "C" {
 #define HAVE_X963_KDF
 #define WOLFSSL_BASE64_ENCODE
 
+#if 1
+    #define HAVE_SESSION_TICKETS
+    #define SMALL_SESSION_CACHE
+#else
+    #define NO_SESSION_CACHE
+#endif
+
 /* Disables */
 #define NO_PKCS8
 #define NO_PKCS12
@@ -145,9 +154,12 @@ extern "C" {
 #define WOLFSSL_NO_SHAKE128
 #define WOLFSSL_NO_SHAKE256
 
-/* Low Resource Options */
-#define NO_ERROR_STRINGS
-#define NO_SESSION_CACHE
+/* Logging */
+#ifdef ENABLE_SECURE_SOCKETS_LOGS
+    #define DEBUG_WOLFSSL
+#else
+    #define NO_ERROR_STRINGS
+#endif
 
 #ifdef __cplusplus
 }

wolfcrypt/src/random.c

@@ -128,6 +128,8 @@ This library contains implementation for the random number generator.
 #elif defined(WOLFSSL_TELIT_M2MB)
 #elif defined(WOLFSSL_SCE) && !defined(WOLFSSL_SCE_NO_TRNG)
 #elif defined(WOLFSSL_IMXRT1170_CAAM)
+#elif defined(CY_USING_HAL) && defined(COMPONENT_WOLFSSL)
+    #include "cyhal_trng.h" /* Infineon/Cypress HAL RNG implementation */
 #elif defined(WOLFSSL_GETRANDOM)
     #include <errno.h>
     #include <sys/random.h>
@@ -3832,6 +3834,40 @@ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
         return ret;
     }
 
+#elif defined(CY_USING_HAL) && defined(COMPONENT_WOLFSSL)
+
+    /* Infineon/Cypress HAL RNG implementation */
+    int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
+    {
+        cyhal_trng_t obj;
+        cy_rslt_t result;
+        uint32_t val;
+        word32 i = 0;
+
+        (void)os;
+
+        result = cyhal_trng_init(&obj);
+        if (result == CY_RSLT_SUCCESS) {
+            while (i < sz) {
+                /* If not aligned or there is odd/remainder add single byte */
+                if( (i + sizeof(word32)) > sz ||
+                    ((wc_ptr_t)&output[i] % sizeof(word32)) != 0
+                ) {
+                    val = cyhal_trng_generate(&obj);
+                    output[i++] = (byte)val;
+                }
+                else {
+                    /* Use native 32 instruction */
+                    val = cyhal_trng_generate(&obj);
+                    *((uint32_t*)&output[i]) = val;
+                    i += sizeof(word32);
+                }
+            }
+            cyhal_trng_free(&obj);
+        }
+        return 0;
+    }
+
 #elif defined(WOLFSSL_SAFERTOS) || defined(WOLFSSL_LEANPSK) || \
       defined(WOLFSSL_IAR_ARM)  || defined(WOLFSSL_MDK_ARM) || \
       defined(WOLFSSL_uITRON4)  || defined(WOLFSSL_uTKERNEL2) || \