Combine hex parameters in a struct
diff --git a/tests/suites/test_suite_pkcs1_v15.function b/tests/suites/test_suite_pkcs1_v15.function
index 7b57bee..9cf3b19 100644
--- a/tests/suites/test_suite_pkcs1_v15.function
+++ b/tests/suites/test_suite_pkcs1_v15.function
@@ -11,18 +11,16 @@
 /* BEGIN_CASE */
 void pkcs1_rsaes_v15_encrypt( int mod, int radix_N, char * input_N,
                               int radix_E, char * input_E, int hash,
-                              uint8_t * message_str, uint32_t msg_len,
-                              uint8_t * rnd_buf, uint32_t rnd_buf_len,
-                              uint8_t * result_hex_str,
-                              uint32_t result_hex_str_len, int result )
+                              HexParam_t * message_str, HexParam_t * rnd_buf,
+                              HexParam_t * result_hex_str, int result )
 {
     unsigned char output[1000];
     mbedtls_rsa_context ctx;
     rnd_buf_info info;
     mbedtls_mpi N, E;
 
-    info.buf = rnd_buf;
-    info.length = rnd_buf_len;
+    info.buf = rnd_buf->x;
+    info.length = rnd_buf->len;
 
     mbedtls_mpi_init( &N ); mbedtls_mpi_init( &E );
     mbedtls_rsa_init( &ctx, MBEDTLS_RSA_PKCS_V15, hash );
@@ -35,11 +33,11 @@
     TEST_ASSERT( mbedtls_rsa_check_pubkey( &ctx ) == 0 );
 
 
-    TEST_ASSERT( mbedtls_rsa_pkcs1_encrypt( &ctx, &rnd_buffer_rand, &info, MBEDTLS_RSA_PUBLIC, msg_len, message_str, output ) == result );
+    TEST_ASSERT( mbedtls_rsa_pkcs1_encrypt( &ctx, &rnd_buffer_rand, &info, MBEDTLS_RSA_PUBLIC, message_str->len, message_str->x, output ) == result );
     if( result == 0 )
     {
 
-        TEST_ASSERT( hexcmp( output, result_hex_str, ctx.len, result_hex_str_len ) == 0 );
+        TEST_ASSERT( hexcmp( output, result_hex_str->x, ctx.len, result_hex_str->len ) == 0 );
     }
 
 exit:
@@ -52,8 +50,8 @@
 void pkcs1_rsaes_v15_decrypt( int mod, int radix_P, char * input_P,
                               int radix_Q, char * input_Q, int radix_N,
                               char * input_N, int radix_E, char * input_E,
-                              int hash, uint8_t * result_hex_str, uint32_t result_hex_str_len,
-                              char * seed, uint8_t * message_str, uint32_t message_str_len,
+                              int hash, HexParam_t * result_hex_str,
+                              char * seed, HexParam_t * message_str,
                               int result )
 {
     unsigned char output[1000];
@@ -81,11 +79,11 @@
     TEST_ASSERT( mbedtls_rsa_check_privkey( &ctx ) == 0 );
 
 
-    TEST_ASSERT( mbedtls_rsa_pkcs1_decrypt( &ctx, &rnd_pseudo_rand, &rnd_info, MBEDTLS_RSA_PRIVATE, &output_len, message_str, output, 1000 ) == result );
+    TEST_ASSERT( mbedtls_rsa_pkcs1_decrypt( &ctx, &rnd_pseudo_rand, &rnd_info, MBEDTLS_RSA_PRIVATE, &output_len, message_str->x, output, 1000 ) == result );
     if( result == 0 )
     {
 
-        TEST_ASSERT( hexcmp( output, result_hex_str, output_len, result_hex_str_len) == 0 );
+        TEST_ASSERT( hexcmp( output, result_hex_str->x, output_len, result_hex_str->len) == 0 );
     }
 
 exit:
@@ -99,10 +97,8 @@
 void pkcs1_rsassa_v15_sign( int mod, int radix_P, char * input_P, int radix_Q,
                             char * input_Q, int radix_N, char * input_N,
                             int radix_E, char * input_E, int digest, int hash,
-                            uint8_t * message_str, uint32_t msg_len,
-                            uint8_t * rnd_buf, uint32_t rnd_buf_len,
-                            uint8_t * result_hex_str,
-                            uint32_t result_hex_str_len, int result )
+                            HexParam_t * message_str, HexParam_t * rnd_buf,
+                            HexParam_t * result_hex_str, int result )
 {
     unsigned char hash_result[1000];
     unsigned char output[1000];
@@ -110,8 +106,8 @@
     mbedtls_mpi N, P, Q, E;
     rnd_buf_info info;
 
-    info.buf = rnd_buf;
-    info.length = rnd_buf_len;
+    info.buf = rnd_buf->x;
+    info.length = rnd_buf->len;
 
     mbedtls_mpi_init( &N ); mbedtls_mpi_init( &P );
     mbedtls_mpi_init( &Q ); mbedtls_mpi_init( &E );
@@ -132,13 +128,13 @@
 
 
     if( mbedtls_md_info_from_type( digest ) != NULL )
-        TEST_ASSERT( mbedtls_md( mbedtls_md_info_from_type( digest ), message_str, msg_len, hash_result ) == 0 );
+        TEST_ASSERT( mbedtls_md( mbedtls_md_info_from_type( digest ), message_str->x, message_str->len, hash_result ) == 0 );
 
     TEST_ASSERT( mbedtls_rsa_pkcs1_sign( &ctx, &rnd_buffer_rand, &info, MBEDTLS_RSA_PRIVATE, digest, 0, hash_result, output ) == result );
     if( result == 0 )
     {
 
-        TEST_ASSERT( hexcmp( output, result_hex_str, ctx.len, result_hex_str_len ) == 0 );
+        TEST_ASSERT( hexcmp( output, result_hex_str->x, ctx.len, result_hex_str->len ) == 0 );
     }
 
 exit:
@@ -151,10 +147,8 @@
 /* BEGIN_CASE */
 void pkcs1_rsassa_v15_verify( int mod, int radix_N, char * input_N,
                               int radix_E, char * input_E, int digest,
-                              int hash, uint8_t * message_str,
-                              uint32_t msg_len, char * salt,
-                              uint8_t * result_str, uint32_t result_str_len,
-                              int result )
+                              int hash, HexParam_t * message_str, char * salt,
+                              HexParam_t * result_str, int result )
 {
     unsigned char hash_result[1000];
     mbedtls_rsa_context ctx;
@@ -173,12 +167,9 @@
 
 
     if( mbedtls_md_info_from_type( digest ) != NULL )
-        TEST_ASSERT( mbedtls_md( mbedtls_md_info_from_type( digest ),
-                                 message_str, msg_len, hash_result ) == 0 );
+        TEST_ASSERT( mbedtls_md( mbedtls_md_info_from_type( digest ), message_str->x, message_str->len, hash_result ) == 0 );
 
-    TEST_ASSERT( mbedtls_rsa_pkcs1_verify( &ctx, NULL, NULL, MBEDTLS_RSA_PUBLIC,
-                                           digest, 0, hash_result,
-                                           result_str ) == result );
+    TEST_ASSERT( mbedtls_rsa_pkcs1_verify( &ctx, NULL, NULL, MBEDTLS_RSA_PUBLIC, digest, 0, hash_result, result_str->x ) == result );
 
 exit:
     mbedtls_mpi_free( &N ); mbedtls_mpi_free( &E );