devcrypto auth error fix/adjustment

Author: night1rider

wolfcrypt/benchmark/benchmark.c

@@ -1991,6 +1991,11 @@ static const char* bench_result_words2[][5] = {
 #endif
 
 
+
+#if defined(WOLFSSL_DEVCRYPTO) && defined(WOLFSSL_AUTHSZ_BENCH)
+    #warning Large/Unalligned AuthSz could result in errors with /dev/crypto
+#endif
+
 /* use kB instead of mB for embedded benchmarking */
 #ifdef BENCH_EMBEDDED
     #ifndef BENCH_NTIMES
@@ -4798,6 +4803,14 @@ void bench_gmac(int useDeviceID)
     const char* gmacStr = "GMAC Default";
 #endif
 
+/* Implementations of /Dev/Crypto will error out if the size of Auth in is */
+/* greater than the system's page size */
+#if defined(WOLFSSL_DEVCRYPTO) && defined(WOLFSSL_AUTHSZ_BENCH)
+    bench_size = WOLFSSL_AUTHSZ_BENCH;
+#elif defined(WOLFSSL_DEVCRYPTO)
+    bench_size = sysconf(_SC_PAGESIZE);
+#endif
+
     /* init keys */
     XMEMSET(bench_plain, 0, bench_size);
     XMEMSET(tag, 0, sizeof(tag));
@@ -4828,7 +4841,13 @@ void bench_gmac(int useDeviceID)
 #ifdef MULTI_VALUE_STATISTICS
     bench_multi_value_stats(max, min, sum, squareSum, runs);
 #endif
-
+#if defined(WOLFSSL_DEVCRYPTO)
+    if (ret != 0 && (bench_size > sysconf(_SC_PAGESIZE))) {
+        printf("authIn Buffer Size[%d] greater than System Page Size[%ld]\n",
+                        bench_size, sysconf(_SC_PAGESIZE));
+    }
+    bench_size = BENCH_SIZE;
+#endif
 }
 
 #endif /* HAVE_AESGCM */

wolfcrypt/src/port/devcrypto/devcrypto_aes.c

@@ -324,6 +324,11 @@ static int wc_DevCrypto_AesGcm(Aes* aes, byte* out, byte* in, word32 sz,
                       dir, (byte*)authIn, authInSz, authTag, authTagSz);
     ret = ioctl(aes->ctx.cfd, CIOCAUTHCRYPT, &crt);
     if (ret != 0) {
+        #ifdef WOLFSSL_DEBUG
+        if (authInSz > sysconf(_SC_PAGESIZE)) {
+            WOLFSSL_MSG("authIn Buffer greater than System Page Size");
+        }
+        #endif
         if (dir == COP_DECRYPT) {
             return AES_GCM_AUTH_E;
         }