crack complete

.gitignore

 **/.vscode
-**/test.*
+**/test*.*
 **/*.exe
 **/*.o
 **/cheat

Makefile

@@ -10,8 +10,8 @@ sha256.o: sha256.c sha256.h
 $(EXE): crack.c sha256.o
 	$(CC) $(CFLAGS) -o $(EXE) crack.c sha256.o
 
-test: test.c
-	$(CC) $(CFLAGS) -o test test.c
+# test: test.c
+# 	$(CC) $(CFLAGS) -o test test.c
 
 clean:
 	rm $(EXE) sha256.o

crack.c

@@ -7,11 +7,13 @@
 
 // constants
 #define INPUTSIZE 10000
+#define BUFFERSIZE 256
 
 #define PWD4_FILENAME "pwd4sha256"
 #define PWD6_FILENAME "pwd6sha256"
 #define OUTPUT_FILENAME "found_pwds.txt"
-#define DICT_FILENAME "common_passwords.txt"
+#define DICT_FILENAME "passwords_dict.txt"
+#define DICT_NUMBERS 10000
 #define PWD4_DICT_FILENAME "common_pwd4.txt"
 #define PWD6_DICT_FILENAME "common_pwd6.txt"
 #define PWD4_NUMBERS 10
@@ -180,9 +182,9 @@ int main(int argc, char** argv) {
         // guess common pwd6
         FILE* dict_fp;
         dict_fp = fopen(PWD6_DICT_FILENAME, "r");
-        char input[INPUTSIZE];
+        char input[BUFFERSIZE];
 
-        while(fgets(input, INPUTSIZE, dict_fp) != NULL) {
+        while(fgets(input, BUFFERSIZE, dict_fp) != NULL) {
             input[PWD6_LEN] = '\0';
             find = check_pwd6_guess(&ctx, hash, input, pwd, checked);
             if (find) {
@@ -194,7 +196,7 @@ int main(int argc, char** argv) {
 
         // guess common pwd4 plus 2 digits
         dict_fp = fopen(PWD4_DICT_FILENAME, "r");
-        while (fgets(input, INPUTSIZE, dict_fp) != NULL) {
+        while (fgets(input, BUFFERSIZE, dict_fp) != NULL) {
             for (fifth = ASCII_NUM_FROM; fifth <= ASCII_NUM_TO; fifth++) {
                 input[4] = fifth;
             for (sixth = ASCII_NUM_FROM; sixth <= ASCII_NUM_TO; sixth++) {
@@ -249,10 +251,28 @@ int main(int argc, char** argv) {
 
         fclose(fp);
     } else if (argc == 2) {
-        // This part for good guess
+        // get the number of passwords to produce
+        FILE* fp;
+        char input[BUFFERSIZE];
+
+        int n = atoi(argv[1]);
+
+        fp = fopen(PWD6_DICT_FILENAME, "r");
+
+        int i = 0;
+        if (n <= DICT_NUMBERS) {
+            while (++i <= n && fgets(input, BUFFERSIZE, fp) != NULL) {
+                printf("%s", input);
+            }
+        } else {
+            fprintf(stderr, "ERROR, too large n\n");
+            exit(0);
+        }
+
+        fclose(fp);
+
     } else if (argc == 3) {
         FILE* fp;
-        FILE* wfp;
         BYTE buffer[SHA256_BLOCK_SIZE];
 
         // read password file and store hashes passwords
@@ -291,7 +311,6 @@ int main(int argc, char** argv) {
 
         // read guess from file and check guess
         fp = fopen(argv[1], "r");
-        wfp = fopen(OUTPUT_FILENAME, "w");
         char input[INPUTSIZE];
         SHA256_CTX ctx;
         BYTE hash[SHA256_BLOCK_SIZE];
@@ -310,12 +329,13 @@ int main(int argc, char** argv) {
 
             if (find) {
                 printf("%s %d\n", input, find);
-                fprintf(wfp, "%s %d\n", input, find);
             }
         }
 
         fclose(fp);
-        fclose(wfp);
+    } else {
+        fprintf(stderr, "ERROR, undefined usage of crack\n");
+        exit(0);
     }
 
     return 0;