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Commit e3a4e66a authored by ChouTatsumi's avatar ChouTatsumi
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complete PWD4 crack

parent 72f3b755
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.gitignore
+ 2
− 1
View file @ e3a4e66a
......@@ -2,3 +2,4 @@
**/test.*
**/*.exe
**/*.o
**/cheat
\ No newline at end of file
crack.c
+ 76
− 57
View file @ e3a4e66a
......@@ -6,10 +6,11 @@
#include "sha256.h"
// constants
#define BUFFERSIZE 256
#define INPUTSIZE 10000
#define PWD4_FILENAME "pwd4sha256"
#define PWD6_FILENAME "pwd6sha256"
#define OUTPUT_FILENAME "found_pwds.txt"
#define PWD4_NUMBERS 10
#define PWD_NUMBERS 30
......@@ -23,9 +24,9 @@
#define ASCII_LOWERCASE_TO 122
// methods reference
void check_guess(BYTE guess[],
BYTE pwd[PWD_NUMBERS][SHA256_BLOCK_SIZE], int checked[]);
void check_n_guess(BYTE guess[], BYTE pwd[][SHA256_BLOCK_SIZE], int n,
void check_guess(char guess[], BYTE pwd[PWD_NUMBERS][SHA256_BLOCK_SIZE],
int checked[]);
void check_n_guess(char guess[], BYTE pwd[][SHA256_BLOCK_SIZE], int n,
int checked[]);
void int_array_init(int array[], int n);
......@@ -50,7 +51,7 @@ int main(int argc, char** argv) {
exit(0);
}
strcpy((char*)&pwd[i], (char*)&buffer);
memcpy(pwd[i], buffer, SHA256_BLOCK_SIZE);
}
fclose(fp);
......@@ -65,39 +66,60 @@ int main(int argc, char** argv) {
exit(0);
}
strcpy((char*)&pwd[i], (char*)&buffer);
memcpy(pwd[i], buffer, SHA256_BLOCK_SIZE);
}
fclose(fp);
// create guess and check it
// crazy test
BYTE guess[5] = {"aaaa"};
// guess[4] = '\0';
int checked[10];
int_array_init(checked, 10);
check_n_guess(guess, pwd, 10, checked);
// int first, second, third, fourth;
// for (first = ASCII_FROM; first <= ASCII_TO; first++) {
// guess[0] = first;
// for (second = ASCII_FROM; second <= ASCII_TO; second++) {
// guess[1] = second;
// for (third = ASCII_FROM; third <= ASCII_TO; third++) {
// guess[2] = third;
// for (fourth = ASCII_FROM; fourth <= ASCII_TO; fourth++) {
// guess[3] = fourth;
// check_n_guess(guess, pwd, 10, checked);
// }
// }
// }
// }
SHA256_CTX ctx;
BYTE buf[SHA256_BLOCK_SIZE];
// open output file
fp = fopen(OUTPUT_FILENAME, "w");
// violent crack PWD4
char guess[5];
guess[4] = '\0';
int checked[PWD4_NUMBERS];
int_array_init(checked, PWD4_NUMBERS);
int first, second, third, fourth;
for (first = ASCII_FROM; first <= ASCII_TO; first++) {
guess[0] = first;
for (second = ASCII_FROM; second <= ASCII_TO; second++) {
guess[1] = second;
for (third = ASCII_FROM; third <= ASCII_TO; third++) {
guess[2] = third;
for (fourth = ASCII_FROM; fourth <= ASCII_TO; fourth++) {
guess[3] = fourth;
// generate hash and check
sha256_init(&ctx);
sha256_update(&ctx, (BYTE*)guess, 4);
sha256_final(&ctx, buf);
for (int i = 0; i < PWD4_NUMBERS; i++) {
if (!checked[i] && !memcmp(pwd[i], buf, SHA256_BLOCK_SIZE)) {
checked[i] = 1;
printf("%s %d\n", guess, i + 1);
fprintf(fp, "%s %d\n", guess, i + 1);
}
}
}
}
}
}
// crack PWD6
fclose(fp);
} else if (argc == 2) {
// This part for good guess
} else if (argc == 3) {
FILE* fp;
BYTE buffer[BUFFERSIZE];
FILE* wfp;
BYTE buffer[SHA256_BLOCK_SIZE];
// read password file and store hashes passwords
fp = fopen(argv[2], "rb");
......@@ -108,6 +130,7 @@ int main(int argc, char** argv) {
fseek(fp, 0, SEEK_END);
pwdsize = ftell(fp);
fseek(fp, 0, SEEK_SET);
pwdcount = pwdsize / SHA256_BLOCK_SIZE;
if (pwdsize % SHA256_BLOCK_SIZE) {
......@@ -134,32 +157,49 @@ 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 buf[SHA256_BLOCK_SIZE];
// create flag arrays to avoid repeat check
int checked[pwdcount];
int_array_init(checked, pwdcount);
while (fgets((char*)&buffer, BUFFERSIZE, fp) != NULL) {
while (fgets(input, INPUTSIZE, fp) != NULL) {
// get rid of \n for buffer
buffer[strlen((char*)&buffer) - 1] = '\0';
check_n_guess(buffer, pwd, pwdcount, checked);
buffer[strlen(input) - 1] = '\0';
// generate hash and check
sha256_init(&ctx);
sha256_update(&ctx, (BYTE*)input, 4);
sha256_final(&ctx, buf);
for (int i = 0; i < pwdcount; i++) {
if (!checked[i] && !memcmp(pwd[i], buf, SHA256_BLOCK_SIZE)) {
checked[i] = 1;
printf("%s %d\n", input, i + 1);
fprintf(wfp, "%s %d\n", input, i + 1);
}
}
}
fclose(fp);
fclose(wfp);
}
return 0;
}
void check_guess(BYTE guess[], BYTE pwd[PWD_NUMBERS][SHA256_BLOCK_SIZE],
void check_guess(char guess[], BYTE pwd[PWD_NUMBERS][SHA256_BLOCK_SIZE],
int checked[]) {
SHA256_CTX ctx;
BYTE buf[SHA256_BLOCK_SIZE];
size_t guess_len = strlen((char*)&guess);
size_t guess_len = strlen(guess);
int i;
sha256_init(&ctx);
sha256_update(&ctx, guess, guess_len);
sha256_update(&ctx, (BYTE*)guess, guess_len);
sha256_final(&ctx, buf);
if (guess_len == 4) {
......@@ -182,27 +222,6 @@ void check_guess(BYTE guess[], BYTE pwd[PWD_NUMBERS][SHA256_BLOCK_SIZE],
}
}
void check_n_guess(BYTE guess[], BYTE pwd[][SHA256_BLOCK_SIZE], int n,
int checked[]) {
SHA256_CTX ctx;
BYTE buf[SHA256_BLOCK_SIZE];
size_t guess_len = strlen((char*)&guess);
int i;
sha256_init(&ctx);
sha256_update(&ctx, guess, guess_len);
sha256_final(&ctx, buf);
for (i = 0; i < n; i++) {
printf("%d %s %s\n", checked[i], buf, pwd[i]);
if (!checked[i] && !memcmp(pwd[i], buf, SHA256_BLOCK_SIZE)) {
checked[i] = 1;
printf("%s %d\n", guess, i + 1);
}
}
}
void int_array_init(int array[], int n) {
for (int i = 0; i < n; i++) array[i] = 0;
}
\ No newline at end of file
found_pwds.txt 0 → 100644
+ 10
− 0
View file @ e3a4e66a
1472 6
1482 7
1995 2
1gae 9
2goo 10
esit 3
sp*t 1
spOt 4
spot 5
xunz 8
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