Fixes for building with “CUSTOM_RAND_GENERATE_BLOCK”. Removed seed as backup RNG source. Fixed building on embedded system with time_t not defined (test.c should use long for asn_test).

IDE/ROWLEY-CROSSWORKS-ARM/user_settings.h

@@ -278,17 +278,21 @@ extern "C" {
 /* Size of returned HW RNG value */
 #define CUSTOM_RAND_TYPE      unsigned int
 
+/* Seed source */
+extern unsigned int custom_rand_generate(void);
+#undef  CUSTOM_RAND_GENERATE
+#define CUSTOM_RAND_GENERATE  custom_rand_generate
+
 /* Choose RNG method */
 #if 1
     /* Use built-in P-RNG (SHA256 based) with HW RNG */
     /* P-RNG + HW RNG (P-RNG is ~8K) */
     #undef  HAVE_HASHDRBG
     #define HAVE_HASHDRBG
-
-    extern unsigned int custom_rand_generate(void);
-    #undef  CUSTOM_RAND_GENERATE
-    #define CUSTOM_RAND_GENERATE  custom_rand_generate
 #else
+    #undef  WC_NO_HASHDRBG
+    #define WC_NO_HASHDRBG
+
     /* Bypass P-RNG and use only HW RNG */
     extern int custom_rand_generate_block(unsigned char* output, unsigned int sz);
     #undef  CUSTOM_RAND_GENERATE_BLOCK

IDE/ROWLEY-CROSSWORKS-ARM/wolfssl.hzp

@@ -122,12 +122,26 @@
         recurse="Yes" />
       <file file_name="user_settings.h" />
       <file file_name="README.md" />
-      <folder
+      <folder Name="source">
-        Name="source"
+        <file file_name="../../src/bio.c">
-        exclude=""
+          <configuration Name="ARM_Debug" build_exclude_from_build="Yes" />
-        filter=""
+        </file>
-        path="../../src"
+        <file file_name="../../src/crl.c" />
-        recurse="No" />
+        <file file_name="../../src/include.am" />
+        <file file_name="../../src/internal.c" />
+        <file file_name="../../src/io.c" />
+        <file file_name="../../src/keys.c" />
+        <file file_name="../../src/libwolfssl.la" />
+        <file file_name="../../src/ocsp.c" />
+        <file file_name="../../src/sniffer.c" />
+        <file file_name="../../src/src_libwolfssl_la-internal.lo" />
+        <file file_name="../../src/src_libwolfssl_la-io.lo" />
+        <file file_name="../../src/src_libwolfssl_la-keys.lo" />
+        <file file_name="../../src/src_libwolfssl_la-ssl.lo" />
+        <file file_name="../../src/src_libwolfssl_la-tls.lo" />
+        <file file_name="../../src/ssl.c" />
+        <file file_name="../../src/tls.c" />
+      </folder>
     </folder>
   </project>
   <project Name="test">

wolfcrypt/src/random.c

@@ -103,20 +103,25 @@ int  wc_RNG_GenerateByte(WC_RNG* rng, byte* b)
     int wnr_timeout     = 0;    /* entropy timeout, mililseconds */
     int wnr_mutex_init  = 0;    /* flag for mutex init */
     wnr_context*  wnr_ctx;      /* global netRandom context */
-#elif !defined(NO_DEV_RANDOM) && !defined(CUSTOM_RAND_GENERATE) && \
-      !defined(WOLFSSL_GENSEED_FORTEST) && !defined(WOLFSSL_MDK_ARM) && \
-      !defined(WOLFSSL_IAR_ARM) && !defined(WOLFSSL_ROWLEY_ARM) && \
-      !defined(WOLFSSL_EMBOS)
-        #include <fcntl.h>
-    #ifndef EBSNET
-        #include <unistd.h>
-    #endif
 #elif defined(FREESCALE_KSDK_2_0_TRNG)
     #include "fsl_trng.h"
 #elif defined(FREESCALE_KSDK_2_0_RNGA)
     #include "fsl_rnga.h"
+
+#elif defined(NO_DEV_RANDOM)
+#elif defined(CUSTOM_RAND_GENERATE)
+#elif defined(CUSTOM_RAND_GENERATE_BLOCK)
+#elif defined(WOLFSSL_GENSEED_FORTEST)
+#elif defined(WOLFSSL_MDK_ARM)
+#elif defined(WOLFSSL_IAR_ARM)
+#elif defined(WOLFSSL_ROWLEY_ARM)
+#elif defined(WOLFSSL_EMBOS)
 #else
     /* include headers that may be needed to get good seed */
+    #include <fcntl.h>
+    #ifndef EBSNET
+        #include <unistd.h>
+    #endif
 #endif
 
 
@@ -602,13 +607,9 @@ int wc_RNG_GenerateBlock(WC_RNG* rng, byte* output, word32 sz)
     }
 #else
 
-    /* try using the generate seed direectly */
-    ret = wc_GenerateSeed(&rng->seed, output, sz);
-    if (ret == 0)
-        return 0;
-
     /* if we get here then there is an RNG configuration error */
     ret = RNG_FAILURE_E;
+
 #endif /* HAVE_HASHDRBG */
 
     return ret;
@@ -1590,6 +1591,11 @@ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
         return 0;
     }
 
+#elif defined(CUSTOM_RAND_GENERATE_BLOCK)
+    /* #define CUSTOM_RAND_GENERATE_BLOCK myRngFunc
+     * extern int myRngFunc(byte* output, word32 sz);
+     */
+
 #elif defined(WOLFSSL_SAFERTOS)
 #elif defined(WOLFSSL_LEANPSK)
 #elif defined(WOLFSSL_IAR_ARM)

wolfcrypt/test/test.c

@@ -1025,8 +1025,7 @@ int base64_test()
 int asn_test()
 {
 #ifndef NO_ASN_TIME
-    {
+    long now;
-    time_t now;
 
     /* Parameter Validation tests. */
     if (wc_GetTime(NULL, sizeof(now)) != BAD_FUNC_ARG)
@@ -1039,7 +1038,6 @@ int asn_test()
         return -102;
     if (now == 0)
         return -103;
-    }
 #endif
 
     return 0;

wolfssl/wolfcrypt/random.h

@@ -35,11 +35,17 @@
     extern "C" {
 #endif
 
-/* Maximum generate block length */
+ /* Maximum generate block length */
 #ifndef RNG_MAX_BLOCK_LEN
     #define RNG_MAX_BLOCK_LEN (0x10000)
 #endif
 
+/* Size of the BRBG seed */
+#ifndef DRBG_SEED_LEN
+    #define DRBG_SEED_LEN (440/8)
+#endif
+
+
 #if defined(CUSTOM_RAND_GENERATE) && !defined(CUSTOM_RAND_TYPE)
     /* To maintain compatibility the default is byte */
     #define CUSTOM_RAND_TYPE    byte
@@ -61,7 +67,6 @@
  * 2. HAVE_INTEL_RDRAND: Uses the Intel RDRAND if supported by CPU.
  * 3. HAVE_HASHDRBG (requires SHA256 enabled): Uses SHA256 based P-RNG
  *     seeded via wc_GenerateSeed. This is the default source.
- * 4. Fallback to using wc_GenerateSeed directly.
  */
 
  /* Seed source can be overriden by defining one of these:
@@ -83,11 +88,7 @@
 #elif defined(HAVE_WNR)
      /* allow whitewood as direct RNG source using wc_GenerateSeed directly */
 #else
-    #ifndef _MSC_VER
+    #error No RNG source defined!
-        #warning "No RNG source defined. Using wc_GenerateSeed directly"
-    #else
-        #pragma message("Warning: No RNG source defined. Using wc_GenerateSeed directly")
-    #endif
 #endif
 
 #ifdef HAVE_WNR
@@ -124,26 +125,25 @@ typedef struct OS_Seed {
     #define WC_RNG_TYPE_DEFINED
 #endif
 
-#ifndef CUSTOM_RAND_GENERATE_BLOCK
-
-#define DRBG_SEED_LEN (440/8)
-
-struct DRBG; /* Private DRBG state */
-
-/* Hash-based Deterministic Random Bit Generator */
-struct WC_RNG {
 #ifdef HAVE_HASHDRBG
+    /* Private DRBG state */
+    struct DRBG;
+#endif
+
+/* RNG context */
+struct WC_RNG {
+    OS_Seed seed;
+    void* heap;
+#ifdef HAVE_HASHDRBG
+    /* Hash-based Deterministic Random Bit Generator */
     struct DRBG* drbg;
     byte status;
 #endif
-    OS_Seed seed;
-    void* heap;
 #ifdef WOLFSSL_ASYNC_CRYPT
     AsyncCryptDev asyncDev;
 #endif
 };
 
-#endif /* !CUSTOM_RAND_GENERATE_BLOCK */
 #endif /* HAVE_FIPS */
 
 /* NO_OLD_RNGNAME removes RNG struct name to prevent possible type conflicts,
@@ -152,6 +152,7 @@ struct WC_RNG {
     #define RNG WC_RNG
 #endif
 
+
 WOLFSSL_LOCAL
 int wc_GenerateSeed(OS_Seed* os, byte* seed, word32 sz);