From 8d040ad41f2d0013439638a15106f995939ca0e3 Mon Sep 17 00:00:00 2001
From: Chris Conlon <chris@wolfssl.com>
Date: Thu, 24 Mar 2016 11:07:05 -0600
Subject: [PATCH] uTasker: add initial port, WOLFSSL_UTASKER

---
 src/internal.c               |  7 +++++
 wolfcrypt/src/logging.c      |  3 ++
 wolfssl/openssl/ssl.h        |  5 ++++
 wolfssl/wolfcrypt/settings.h | 58 ++++++++++++++++++++++++++++++++++--
 wolfssl/wolfcrypt/types.h    |  4 +--
 5 files changed, 73 insertions(+), 4 deletions(-)

diff --git a/src/internal.c b/src/internal.c
index f072d8181..c46235b42 100755
--- a/src/internal.c
+++ b/src/internal.c
@@ -3351,6 +3351,13 @@ ProtocolVersion MakeDTLSv1_2(void)
         return (word32) Seconds_get();
     }
 
+#elif defined(WOLFSSL_UTASKER)
+
+    word32 LowResTimer(void)
+    {
+		return (word32)(uTaskerSystemTick / TICK_RESOLUTION);
+    }
+
 #elif defined(USER_TICKS)
 #if 0
     word32 LowResTimer(void)
diff --git a/wolfcrypt/src/logging.c b/wolfcrypt/src/logging.c
index 4351f7209..9a4fac5f4 100644
--- a/wolfcrypt/src/logging.c
+++ b/wolfcrypt/src/logging.c
@@ -122,6 +122,9 @@ static void wolfssl_log(const int logLevel, const char *const logMessage)
             fflush(stdout) ;
 #elif defined(WOLFSSL_LOG_PRINTF)
             printf("%s\n", logMessage);
+#elif defined(WOLFSSL_UTASKER)
+            fnDebugMsg((char*)logMessage);
+            fnDebugMsg("\r\n");
 #else
             fprintf(stderr, "%s\n", logMessage);
 #endif
diff --git a/wolfssl/openssl/ssl.h b/wolfssl/openssl/ssl.h
index f9bf3f03e..67902a679 100644
--- a/wolfssl/openssl/ssl.h
+++ b/wolfssl/openssl/ssl.h
@@ -41,6 +41,11 @@
     #undef X509_NAME
 #endif
 
+#ifdef WOLFSSL_UTASKER
+    /* tcpip.h clashes */
+    #undef ASN1_INTEGER
+#endif
+
 
 typedef WOLFSSL          SSL;
 typedef WOLFSSL_SESSION  SSL_SESSION;
diff --git a/wolfssl/wolfcrypt/settings.h b/wolfssl/wolfcrypt/settings.h
index 5e5d1f34d..527b829cd 100644
--- a/wolfssl/wolfcrypt/settings.h
+++ b/wolfssl/wolfcrypt/settings.h
@@ -139,6 +139,9 @@
 /* Uncomment next line to enable asynchronous crypto WC_PENDING_E */
 /* #define WOLFSSL_ASYNC_CRYPT */
 
+/* Uncomment next line if building for uTasker */
+/* #define WOLFSSL_UTASKER */
+
 #include <wolfssl/wolfcrypt/visibility.h>
 
 #ifdef WOLFSSL_USER_SETTINGS
@@ -349,9 +352,60 @@
 #endif
 
 
+#ifdef WOLFSSL_UTASKER
+    /* uTasker configuration - used for fnRandom() */
+    #include "config.h"
+
+    #define SINGLE_THREADED
+    #define NO_WOLFSSL_DIR
+    #define WOLFSSL_HAVE_MIN
+    #define NO_WRITEV
+
+    #define HAVE_ECC
+    #define ALT_ECC_SIZE
+    #define USE_FAST_MATH
+    #define TFM_TIMING_RESISTANT
+    #define ECC_TIMING_RESISTANT
+
+    /* used in wolfCrypt test */
+    #define NO_MAIN_DRIVER
+    #define USE_CERT_BUFFERS_2048
+
+    /* uTasker port uses RAW sockets, use I/O callbacks
+	 * See wolfSSL uTasker example for sample callbacks */
+    #define WOLFSSL_USER_IO
+
+    /* uTasker filesystem not ported  */
+    #define NO_FILESYSTEM
+
+    /* uTasker RNG is abstracted, calls HW RNG when available */
+    #define CUSTOM_RAND_GENERATE    fnRandom
+    #define CUSTOM_RAND_TYPE        unsigned short
+
+    /* use uTasker std library replacements where available */
+    #define STRING_USER
+    #define XMEMCPY(d,s,l)         uMemcpy((d),(s),(l))
+    #define XMEMSET(b,c,l)         uMemset((b),(c),(l))
+    #define XMEMCMP(s1,s2,n)       uMemcmp((s1),(s2),(n))
+    #define XMEMMOVE(d,s,l)        memmove((d),(s),(l))
+
+    #define XSTRLEN(s1)            uStrlen((s1))
+    #define XSTRNCPY(s1,s2,n)      strncpy((s1),(s2),(n))
+    #define XSTRSTR(s1,s2)         strstr((s1),(s2))
+    #define XSTRNSTR(s1,s2,n)      mystrnstr((s1),(s2),(n))
+    #define XSTRNCMP(s1,s2,n)      strncmp((s1),(s2),(n))
+    #define XSTRNCAT(s1,s2,n)      strncat((s1),(s2),(n))
+    #define XSTRNCASECMP(s1,s2,n)  _strnicmp((s1),(s2),(n))
+    #if defined(WOLFSSL_CERT_EXT) || defined(HAVE_ALPN)
+        #define XSTRTOK            strtok_r
+    #endif
+#endif
+
+
 /* Micrium will use Visual Studio for compilation but not the Win32 API */
-#if defined(_WIN32) && !defined(MICRIUM) && !defined(FREERTOS) && !defined(FREERTOS_TCP)\
-        && !defined(EBSNET) && !defined(WOLFSSL_EROAD)
+#if defined(_WIN32) && !defined(MICRIUM) && !defined(FREERTOS) && \
+	!defined(FREERTOS_TCP) && !defined(EBSNET) && !defined(WOLFSSL_EROAD) && \
+	!defined(WOLFSSL_UTASKER)
     #define USE_WINDOWS_API
 #endif
 
diff --git a/wolfssl/wolfcrypt/types.h b/wolfssl/wolfcrypt/types.h
index af30c926e..5ce3c32a0 100644
--- a/wolfssl/wolfcrypt/types.h
+++ b/wolfssl/wolfcrypt/types.h
@@ -160,8 +160,8 @@
 
 
 	/* Micrium will use Visual Studio for compilation but not the Win32 API */
-	#if defined(_WIN32) && !defined(MICRIUM) && !defined(FREERTOS) && !defined(FREERTOS_TCP) \
-	        && !defined(EBSNET)
+	#if defined(_WIN32) && !defined(MICRIUM) && !defined(FREERTOS) && \
+		!defined(FREERTOS_TCP) && !defined(EBSNET) && !defined(WOLFSSL_UTASKER)
 	    #define USE_WINDOWS_API
 	#endif