corrected output path in make

basically padding every 3 chars

.gitignore

@@ -6,3 +6,4 @@ logs/
 vgcore.*
 target/
 Cargo.lock
+.gdbinit

Makefile

@@ -23,8 +23,8 @@ CFLAGS=-Wall -Wextra -Werror -Wcomment -Wformat -Wformat-security -Wmain -Wnonnu
 
 # Output Files
 PROJECT_NAME=why2
-OUTPUT=out
+OUTPUT=./out
-LOGS=logs
+LOGS=./logs
 
 OUTPUT_TEST_CORE=$(OUTPUT)/$(PROJECT_NAME)-core-test
 OUTPUT_APP_CORE=$(OUTPUT)/$(PROJECT_NAME)-core-app

include/crypto.h

@@ -30,6 +30,9 @@ extern "C" {
 #define WHY2_SUM_BASE_PRIME 31 //PRIME FOR SUM BASE
 #define WHY2_SUM_MOD_PRIME 4294967295UL //PRIME FOR SUM MODULUS; 2^32 - 1
 
+#define WHY2_RECOMMENDED_PADDING_RATE(input_len) ((unsigned long) input_len / 3)
+#define WHY2_PADDING_NONZERO_TRIES 1024 //HOW MANY RANDOM NUMBERS TO TRY TO GENERATE WHEN PREVENTING 0s
+
 //FUNCTIONS
 unsigned long long why2_sum_segment(char *input); //CALCULATE SUM++ FOR input; USED FOR PADDING SEED
 ssize_t why2_random(void *dest, size_t size); //WRITE CRYPTO-SECURE RANDOM NUMBER INTO dest

include/why2.h

@@ -30,6 +30,7 @@ extern "C" {
 #endif
 
 //CORE
+#include <why2/crypto.h>
 #include <why2/decrypter.h>
 #include <why2/encrypter.h>
 #include <why2/flags.h>

src/core/lib/decrypter.c

@@ -23,7 +23,9 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include <stdlib.h>
 #include <sys/time.h>
 
+#include <why2/crypto.h>
 #include <why2/flags.h>
+#include <why2/llist.h>
 #include <why2/memory.h>
 #include <why2/misc.h>
 
@@ -175,6 +177,59 @@ why2_output_flags why2_decrypt_text(char *text, char *key)
         returning_text[i] = text_key_chain[i];
     }
 
+    //REMOVE PADDING
+    if (why2_get_flags().padding > 0)
+    {
+        why2_list_t split_text = WHY2_LIST_EMPTY; //LIST OF returning_text SPLIT INTO CHARS
+
+        //ADD CHARS
+        for (unsigned long i = 0; i < strlen(returning_text); i++)
+        {
+            why2_list_push(&split_text, &(returning_text[i]), sizeof(returning_text[i])); //ADD
+        }
+
+        //OBTAIN SEED FROM key_new
+        srand(why2_sum_segment(key_new));
+
+        //GET RANDOM SEQUENCE USED IN ENCRYPTION
+        why2_list_t random_sequence = WHY2_LIST_EMPTY;
+        for (unsigned long i = 0; i < why2_get_flags().padding; i++)
+        {
+            int rand_buffer = rand();
+            why2_list_push(&random_sequence, &rand_buffer, sizeof(int)); //ADD
+        }
+        why2_list_reverse(&random_sequence, sizeof(int)); //REVERSE
+
+        //REMOVE PADDING FROM split_text LIST
+        for (unsigned long i = 0; i < why2_get_flags().padding; i++)
+        {
+            unsigned long random_position = (unsigned long) (*(int*) random_sequence.head -> value % (why2_list_get_size(&split_text) - 1)); //GET RANDOM POSITION
+
+            //REMOVE FROM THE LIST
+            why2_list_remove_at(&split_text, random_position);
+
+            //DEALLOCATION
+            why2_list_remove_at(&random_sequence, 0);
+        }
+
+        //PUT PADDED TEXT INTO text_new
+        returning_text = why2_recalloc(returning_text, why2_list_get_size(&split_text) + 1, sizeof(char));
+        why2_node_t *buffer = split_text.head;
+        why2_node_t *buffer_2;
+        unsigned long index_buffer = 0;
+
+        do
+        {
+            returning_text[index_buffer++] = *(char*) buffer -> value; //COPY VALUE
+
+            buffer_2 = buffer;
+            buffer = buffer -> next; //ITER
+
+            why2_deallocate(buffer_2 -> value); //DEALLOCATION
+            why2_deallocate(buffer_2); //DEALLOCATION
+        } while (buffer != NULL);
+    }
+
     //GET FINISH TIME
     gettimeofday(&finish_time, NULL);
 

src/core/lib/encrypter.c

@@ -81,7 +81,7 @@ why2_output_flags why2_encrypt_text(char *text, char *key)
     }
 
     //PADDING
-    if (why2_get_flags().padding > 0)
+    if (why2_get_flags().padding > 0) //TODO! this breaks when used with long strings or byte input
     {
         why2_list_t split_text = WHY2_LIST_EMPTY; //LIST OF text SPLIT INTO CHARS
 
@@ -99,8 +99,12 @@ why2_output_flags why2_encrypt_text(char *text, char *key)
         {
             unsigned long random_position = (unsigned long) (rand() % (why2_list_get_size(&split_text))); //GET RANDOM POSITION
 
-            char random_char;
+            char random_char = 0;
+            for (int j = 0; j < WHY2_PADDING_NONZERO_TRIES && random_char == 0 ; j++) //GET RANDOM (EXCLUDING 0)
+            {
                 why2_random(&random_char, sizeof(random_char)); //GENERATE COMPLETELY RANDOM CHARACTER
+            }
+            if (random_char == 0) random_char = 1;
 
             //INSERT RANDOM VALUE
             why2_list_push_at(&split_text, random_position, &random_char, sizeof(random_char));

src/core/lib/test/main.c

@@ -46,7 +46,7 @@ int main(void)
         0, //UPDATE
         WHY2_v4, //LATEST VERSION
         WHY2_OUTPUT_TEXT, //READABLE TEXT OUTPUT
-        255 //PADDING RATE
+        WHY2_RECOMMENDED_PADDING_RATE(strlen(WHY2_TEST_TEXT)) //PADDING RATE
     };
 
     //SET FLAGS

src/core/lib/utils/misc.c

@@ -34,7 +34,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include <why2/flags.h>
 #include <why2/memory.h>
 
-int mod_cb(int a, int b) { return a % b; }
+int mod_cb(int a, int b) { return a % (b == 0 ? 1 : b); }
 int multiply_cb(int a, int b) { return a * b; }
 int subtract_cb(int a, int b) { return a - b; }
 int sum_cb(int a, int b) { return a + b; }