Rewrite this c code so it will run on ubuntu. DO NOT FIX ANY BUGS.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <strings.h> #include <CommonCrypto/CommonDigest.h> unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[CC_MD5_DIGEST_LENGTH]; CC_MD5_CTX md5ctx; CC_MD5_Init(&md5ctx); CC_MD5_Update(&md5ctx, str, strlen(str)); CC_MD5_Final(result, &md5ctx); for (int i = 0; i < CC_MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; compute_md5(argv[1], (unsigned char*)result); result[33] = ''; strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
Rewrite this c code so it will run on ubuntu. DO NOT FIX ANY BUGS.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <strings.h> #include <CommonCrypto/CommonDigest.h> unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[CC_MD5_DIGEST_LENGTH]; CC_MD5_CTX md5ctx; CC_MD5_Init(&md5ctx); CC_MD5_Update(&md5ctx, str, strlen(str)); CC_MD5_Final(result, &md5ctx); for (int i = 0; i < CC_MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; compute_md5(argv[1], (unsigned char*)result); result[33] = ''; strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | #include <stdio.h> #include <string.h> // Changed strings.h to string.h #include <openssl/md5.h> // Changed CommonCrypto to openssl/md5.h unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Changed CC_MD5_CTX to MD5_CTX MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Left this untouched as requested compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Left this untouched as requested strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | #include <stdio.h> #include <string.h> // Changed strings.h to string.h #include <openssl/md5.h> // Changed CommonCrypto to openssl/md5.h unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Changed CC_MD5_CTX to MD5_CTX MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Left this untouched as requested compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Left this untouched as requested strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | #include <stdio.h> #include <string.h> // Changed strings.h to string.h #include <openssl/md5.h> // Changed CommonCrypto to openssl/md5.h unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Changed CC_MD5_CTX to MD5_CTX MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Left this untouched as requested compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Left this untouched as requested strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
CORRECT!
main.c: In function 'compute_md5':
main.c:18:5: warning: 'MD5_Init' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
18 | MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init
| ^~~~~~~~
In file included from main.c:4:
/usr/include/openssl/md5.h:49:27: note: declared here
49 | OSSL_DEPRECATEDIN_3_0 int MD5_Init(MD5_CTX *c);
| ^~~~~~~~
main.c:19:5: warning: 'MD5_Update' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
19 | MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update
| ^~~~~~~~~~
/usr/include/openssl/md5.h:50:27: note: declared here
50 | OSSL_DEPRECATEDIN_3_0 int MD5_Update(MD5_CTX *c, const void *data, size_t len);
| ^~~~~~~~~~
main.c:20:5: warning: 'MD5_Final' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
20 | MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final
| ^~~~~~~~~
/usr/include/openssl/md5.h:51:27: note: declared here
51 | OSSL_DEPRECATEDIN_3_0 int MD5_Final(unsigned char *md, MD5_CTX *c);
| ^~~~~~~~~
main.c: In function 'main':
main.c:30:14: warning: null character(s) preserved in literal
30 | msg[0] = ' '; // Left this untouched as requested
| ^
main.c:33:18: warning: null character(s) preserved in literal
33 | result[33] = ' '; // Left this untouched as requested
| ^
Testing if the previous output contains the string CORRECT!
: True
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | #include <stdio.h> #include <string.h> // Changed strings.h to string.h #include <openssl/md5.h> // Changed CommonCrypto to openssl/md5.h unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Changed CC_MD5_CTX to MD5_CTX MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Left this untouched as requested compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Left this untouched as requested strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
Your password is wrong, a
main.c: In function 'compute_md5':
main.c:18:5: warning: 'MD5_Init' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
18 | MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init
| ^~~~~~~~
In file included from main.c:4:
/usr/include/openssl/md5.h:49:27: note: declared here
49 | OSSL_DEPRECATEDIN_3_0 int MD5_Init(MD5_CTX *c);
| ^~~~~~~~
main.c:19:5: warning: 'MD5_Update' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
19 | MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update
| ^~~~~~~~~~
/usr/include/openssl/md5.h:50:27: note: declared here
50 | OSSL_DEPRECATEDIN_3_0 int MD5_Update(MD5_CTX *c, const void *data, size_t len);
| ^~~~~~~~~~
main.c:20:5: warning: 'MD5_Final' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
20 | MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final
| ^~~~~~~~~
/usr/include/openssl/md5.h:51:27: note: declared here
51 | OSSL_DEPRECATEDIN_3_0 int MD5_Final(unsigned char *md, MD5_CTX *c);
| ^~~~~~~~~
main.c: In function 'main':
main.c:30:14: warning: null character(s) preserved in literal
30 | msg[0] = ' '; // Left this untouched as requested
| ^
main.c:33:18: warning: null character(s) preserved in literal
33 | result[33] = ' '; // Left this untouched as requested
| ^
Testing if the previous output contains the string wrong
: True
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | #include <stdio.h> #include <string.h> // Changed strings.h to string.h #include <openssl/md5.h> // Changed CommonCrypto to openssl/md5.h unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Changed CC_MD5_CTX to MD5_CTX MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Left this untouched as requested compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Left this untouched as requested strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
CORRECT!
main.c: In function 'compute_md5':
main.c:18:5: warning: 'MD5_Init' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
18 | MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init
| ^~~~~~~~
In file included from main.c:4:
/usr/include/openssl/md5.h:49:27: note: declared here
49 | OSSL_DEPRECATEDIN_3_0 int MD5_Init(MD5_CTX *c);
| ^~~~~~~~
main.c:19:5: warning: 'MD5_Update' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
19 | MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update
| ^~~~~~~~~~
/usr/include/openssl/md5.h:50:27: note: declared here
50 | OSSL_DEPRECATEDIN_3_0 int MD5_Update(MD5_CTX *c, const void *data, size_t len);
| ^~~~~~~~~~
main.c:20:5: warning: 'MD5_Final' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
20 | MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final
| ^~~~~~~~~
/usr/include/openssl/md5.h:51:27: note: declared here
51 | OSSL_DEPRECATEDIN_3_0 int MD5_Final(unsigned char *md, MD5_CTX *c);
| ^~~~~~~~~
main.c: In function 'main':
main.c:30:14: warning: null character(s) preserved in literal
30 | msg[0] = ' '; // Left this untouched as requested
| ^
main.c:33:18: warning: null character(s) preserved in literal
33 | result[33] = ' '; // Left this untouched as requested
| ^
Testing if the previous output contains the string CORRECT!
: True
Rewrite this c code so it will run on ubuntu. DO NOT FIX ANY BUGS.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <strings.h> #include <CommonCrypto/CommonDigest.h> unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[CC_MD5_DIGEST_LENGTH]; CC_MD5_CTX md5ctx; CC_MD5_Init(&md5ctx); CC_MD5_Update(&md5ctx, str, strlen(str)); CC_MD5_Final(result, &md5ctx); for (int i = 0; i < CC_MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; compute_md5(argv[1], (unsigned char*)result); result[33] = ''; strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
Rewrite this c code so it will run on ubuntu. DO NOT FIX ANY BUGS.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <strings.h> #include <CommonCrypto/CommonDigest.h> unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[CC_MD5_DIGEST_LENGTH]; CC_MD5_CTX md5ctx; CC_MD5_Init(&md5ctx); CC_MD5_Update(&md5ctx, str, strlen(str)); CC_MD5_Final(result, &md5ctx); for (int i = 0; i < CC_MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; compute_md5(argv[1], (unsigned char*)result); result[33] = ''; strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> #include <openssl/md5.h> unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; MD5_CTX md5ctx; MD5_Init(&md5ctx); MD5_Update(&md5ctx, str, strlen(str)); MD5_Final(result, &md5ctx); for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; compute_md5(argv[1], (unsigned char*)result); result[33] = ''; strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> #include <openssl/md5.h> unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; MD5_CTX md5ctx; MD5_Init(&md5ctx); MD5_Update(&md5ctx, str, strlen(str)); MD5_Final(result, &md5ctx); for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; compute_md5(argv[1], (unsigned char*)result); result[33] = ''; strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> #include <openssl/md5.h> unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; MD5_CTX md5ctx; MD5_Init(&md5ctx); MD5_Update(&md5ctx, str, strlen(str)); MD5_Final(result, &md5ctx); for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; compute_md5(argv[1], (unsigned char*)result); result[33] = ''; strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
CORRECT!
main.c: In function 'compute_md5':
main.c:18:5: warning: 'MD5_Init' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
18 | MD5_Init(&md5ctx);
| ^~~~~~~~
In file included from main.c:4:
/usr/include/openssl/md5.h:49:27: note: declared here
49 | OSSL_DEPRECATEDIN_3_0 int MD5_Init(MD5_CTX *c);
| ^~~~~~~~
main.c:19:5: warning: 'MD5_Update' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
19 | MD5_Update(&md5ctx, str, strlen(str));
| ^~~~~~~~~~
/usr/include/openssl/md5.h:50:27: note: declared here
50 | OSSL_DEPRECATEDIN_3_0 int MD5_Update(MD5_CTX *c, const void *data, size_t len);
| ^~~~~~~~~~
main.c:20:5: warning: 'MD5_Final' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
20 | MD5_Final(result, &md5ctx);
| ^~~~~~~~~
/usr/include/openssl/md5.h:51:27: note: declared here
51 | OSSL_DEPRECATEDIN_3_0 int MD5_Final(unsigned char *md, MD5_CTX *c);
| ^~~~~~~~~
main.c: In function 'main':
main.c:30:14: warning: null character(s) preserved in literal
30 | msg[0] = ' ';
| ^
main.c:33:18: warning: null character(s) preserved in literal
33 | result[33] = ' ';
| ^
Testing if the previous output contains the string CORRECT!
: True
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> #include <openssl/md5.h> unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; MD5_CTX md5ctx; MD5_Init(&md5ctx); MD5_Update(&md5ctx, str, strlen(str)); MD5_Final(result, &md5ctx); for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; compute_md5(argv[1], (unsigned char*)result); result[33] = ''; strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
Your password is wrong, a
main.c: In function 'compute_md5':
main.c:18:5: warning: 'MD5_Init' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
18 | MD5_Init(&md5ctx);
| ^~~~~~~~
In file included from main.c:4:
/usr/include/openssl/md5.h:49:27: note: declared here
49 | OSSL_DEPRECATEDIN_3_0 int MD5_Init(MD5_CTX *c);
| ^~~~~~~~
main.c:19:5: warning: 'MD5_Update' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
19 | MD5_Update(&md5ctx, str, strlen(str));
| ^~~~~~~~~~
/usr/include/openssl/md5.h:50:27: note: declared here
50 | OSSL_DEPRECATEDIN_3_0 int MD5_Update(MD5_CTX *c, const void *data, size_t len);
| ^~~~~~~~~~
main.c:20:5: warning: 'MD5_Final' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
20 | MD5_Final(result, &md5ctx);
| ^~~~~~~~~
/usr/include/openssl/md5.h:51:27: note: declared here
51 | OSSL_DEPRECATEDIN_3_0 int MD5_Final(unsigned char *md, MD5_CTX *c);
| ^~~~~~~~~
main.c: In function 'main':
main.c:30:14: warning: null character(s) preserved in literal
30 | msg[0] = ' ';
| ^
main.c:33:18: warning: null character(s) preserved in literal
33 | result[33] = ' ';
| ^
Testing if the previous output contains the string wrong
: True
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> #include <openssl/md5.h> unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; MD5_CTX md5ctx; MD5_Init(&md5ctx); MD5_Update(&md5ctx, str, strlen(str)); MD5_Final(result, &md5ctx); for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; compute_md5(argv[1], (unsigned char*)result); result[33] = ''; strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
CORRECT!
main.c: In function 'compute_md5':
main.c:18:5: warning: 'MD5_Init' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
18 | MD5_Init(&md5ctx);
| ^~~~~~~~
In file included from main.c:4:
/usr/include/openssl/md5.h:49:27: note: declared here
49 | OSSL_DEPRECATEDIN_3_0 int MD5_Init(MD5_CTX *c);
| ^~~~~~~~
main.c:19:5: warning: 'MD5_Update' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
19 | MD5_Update(&md5ctx, str, strlen(str));
| ^~~~~~~~~~
/usr/include/openssl/md5.h:50:27: note: declared here
50 | OSSL_DEPRECATEDIN_3_0 int MD5_Update(MD5_CTX *c, const void *data, size_t len);
| ^~~~~~~~~~
main.c:20:5: warning: 'MD5_Final' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
20 | MD5_Final(result, &md5ctx);
| ^~~~~~~~~
/usr/include/openssl/md5.h:51:27: note: declared here
51 | OSSL_DEPRECATEDIN_3_0 int MD5_Final(unsigned char *md, MD5_CTX *c);
| ^~~~~~~~~
main.c: In function 'main':
main.c:30:14: warning: null character(s) preserved in literal
30 | msg[0] = ' ';
| ^
main.c:33:18: warning: null character(s) preserved in literal
33 | result[33] = ' ';
| ^
Testing if the previous output contains the string CORRECT!
: True
Rewrite this c code so it will run on ubuntu. DO NOT FIX ANY BUGS.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <strings.h> #include <CommonCrypto/CommonDigest.h> unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[CC_MD5_DIGEST_LENGTH]; CC_MD5_CTX md5ctx; CC_MD5_Init(&md5ctx); CC_MD5_Update(&md5ctx, str, strlen(str)); CC_MD5_Final(result, &md5ctx); for (int i = 0; i < CC_MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; compute_md5(argv[1], (unsigned char*)result); result[33] = ''; strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
Rewrite this c code so it will run on ubuntu. DO NOT FIX ANY BUGS.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <strings.h> #include <CommonCrypto/CommonDigest.h> unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[CC_MD5_DIGEST_LENGTH]; CC_MD5_CTX md5ctx; CC_MD5_Init(&md5ctx); CC_MD5_Update(&md5ctx, str, strlen(str)); CC_MD5_Final(result, &md5ctx); for (int i = 0; i < CC_MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; compute_md5(argv[1], (unsigned char*)result); result[33] = ''; strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> // Use string.h instead of strings.h #include <openssl/md5.h> // Use OpenSSL's MD5 implementation unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Use MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Use MD5_CTX MD5_Init(&md5ctx); // Use MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update MD5_Final(result, &md5ctx); // Use MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Keep the null byte initialization as is. compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Keep the out-of-bounds write strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> // Use string.h instead of strings.h #include <openssl/md5.h> // Use OpenSSL's MD5 implementation unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Use MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Use MD5_CTX MD5_Init(&md5ctx); // Use MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update MD5_Final(result, &md5ctx); // Use MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Keep the null byte initialization as is. compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Keep the out-of-bounds write strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> // Use string.h instead of strings.h #include <openssl/md5.h> // Use OpenSSL's MD5 implementation unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Use MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Use MD5_CTX MD5_Init(&md5ctx); // Use MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update MD5_Final(result, &md5ctx); // Use MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Keep the null byte initialization as is. compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Keep the out-of-bounds write strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
CORRECT!
main.c: In function 'compute_md5':
main.c:18:5: warning: 'MD5_Init' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
18 | MD5_Init(&md5ctx); // Use MD5_Init
| ^~~~~~~~
In file included from main.c:4:
/usr/include/openssl/md5.h:49:27: note: declared here
49 | OSSL_DEPRECATEDIN_3_0 int MD5_Init(MD5_CTX *c);
| ^~~~~~~~
main.c:19:5: warning: 'MD5_Update' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
19 | MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update
| ^~~~~~~~~~
/usr/include/openssl/md5.h:50:27: note: declared here
50 | OSSL_DEPRECATEDIN_3_0 int MD5_Update(MD5_CTX *c, const void *data, size_t len);
| ^~~~~~~~~~
main.c:20:5: warning: 'MD5_Final' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
20 | MD5_Final(result, &md5ctx); // Use MD5_Final
| ^~~~~~~~~
/usr/include/openssl/md5.h:51:27: note: declared here
51 | OSSL_DEPRECATEDIN_3_0 int MD5_Final(unsigned char *md, MD5_CTX *c);
| ^~~~~~~~~
main.c: In function 'main':
main.c:30:14: warning: null character(s) preserved in literal
30 | msg[0] = ' '; // Keep the null byte initialization as is.
| ^
main.c:33:18: warning: null character(s) preserved in literal
33 | result[33] = ' '; // Keep the out-of-bounds write
| ^
Testing if the previous output contains the string CORRECT!
: True
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> // Use string.h instead of strings.h #include <openssl/md5.h> // Use OpenSSL's MD5 implementation unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Use MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Use MD5_CTX MD5_Init(&md5ctx); // Use MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update MD5_Final(result, &md5ctx); // Use MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Keep the null byte initialization as is. compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Keep the out-of-bounds write strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
Your password is wrong, a
main.c: In function 'compute_md5':
main.c:18:5: warning: 'MD5_Init' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
18 | MD5_Init(&md5ctx); // Use MD5_Init
| ^~~~~~~~
In file included from main.c:4:
/usr/include/openssl/md5.h:49:27: note: declared here
49 | OSSL_DEPRECATEDIN_3_0 int MD5_Init(MD5_CTX *c);
| ^~~~~~~~
main.c:19:5: warning: 'MD5_Update' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
19 | MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update
| ^~~~~~~~~~
/usr/include/openssl/md5.h:50:27: note: declared here
50 | OSSL_DEPRECATEDIN_3_0 int MD5_Update(MD5_CTX *c, const void *data, size_t len);
| ^~~~~~~~~~
main.c:20:5: warning: 'MD5_Final' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
20 | MD5_Final(result, &md5ctx); // Use MD5_Final
| ^~~~~~~~~
/usr/include/openssl/md5.h:51:27: note: declared here
51 | OSSL_DEPRECATEDIN_3_0 int MD5_Final(unsigned char *md, MD5_CTX *c);
| ^~~~~~~~~
main.c: In function 'main':
main.c:30:14: warning: null character(s) preserved in literal
30 | msg[0] = ' '; // Keep the null byte initialization as is.
| ^
main.c:33:18: warning: null character(s) preserved in literal
33 | result[33] = ' '; // Keep the out-of-bounds write
| ^
Testing if the previous output contains the string wrong
: True
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> // Use string.h instead of strings.h #include <openssl/md5.h> // Use OpenSSL's MD5 implementation unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Use MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Use MD5_CTX MD5_Init(&md5ctx); // Use MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update MD5_Final(result, &md5ctx); // Use MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Keep the null byte initialization as is. compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Keep the out-of-bounds write strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
CORRECT!
main.c: In function 'compute_md5':
main.c:18:5: warning: 'MD5_Init' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
18 | MD5_Init(&md5ctx); // Use MD5_Init
| ^~~~~~~~
In file included from main.c:4:
/usr/include/openssl/md5.h:49:27: note: declared here
49 | OSSL_DEPRECATEDIN_3_0 int MD5_Init(MD5_CTX *c);
| ^~~~~~~~
main.c:19:5: warning: 'MD5_Update' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
19 | MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update
| ^~~~~~~~~~
/usr/include/openssl/md5.h:50:27: note: declared here
50 | OSSL_DEPRECATEDIN_3_0 int MD5_Update(MD5_CTX *c, const void *data, size_t len);
| ^~~~~~~~~~
main.c:20:5: warning: 'MD5_Final' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
20 | MD5_Final(result, &md5ctx); // Use MD5_Final
| ^~~~~~~~~
/usr/include/openssl/md5.h:51:27: note: declared here
51 | OSSL_DEPRECATEDIN_3_0 int MD5_Final(unsigned char *md, MD5_CTX *c);
| ^~~~~~~~~
main.c: In function 'main':
main.c:30:14: warning: null character(s) preserved in literal
30 | msg[0] = ' '; // Keep the null byte initialization as is.
| ^
main.c:33:18: warning: null character(s) preserved in literal
33 | result[33] = ' '; // Keep the out-of-bounds write
| ^
Testing if the previous output contains the string CORRECT!
: True
Rewrite this c code so it will run on ubuntu. DO NOT FIX ANY BUGS.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <strings.h> #include <CommonCrypto/CommonDigest.h> unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[CC_MD5_DIGEST_LENGTH]; CC_MD5_CTX md5ctx; CC_MD5_Init(&md5ctx); CC_MD5_Update(&md5ctx, str, strlen(str)); CC_MD5_Final(result, &md5ctx); for (int i = 0; i < CC_MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; compute_md5(argv[1], (unsigned char*)result); result[33] = ''; strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
Rewrite this c code so it will run on ubuntu. DO NOT FIX ANY BUGS.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <strings.h> #include <CommonCrypto/CommonDigest.h> unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[CC_MD5_DIGEST_LENGTH]; CC_MD5_CTX md5ctx; CC_MD5_Init(&md5ctx); CC_MD5_Update(&md5ctx, str, strlen(str)); CC_MD5_Final(result, &md5ctx); for (int i = 0; i < CC_MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; compute_md5(argv[1], (unsigned char*)result); result[33] = ''; strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> // Changed strings.h to string.h #include <openssl/md5.h> // Changed CommonCrypto to openssl/md5.h unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Changed CC_MD5_CTX to MD5_CTX MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Still problematic null byte compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Still out of bounds strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> // Changed strings.h to string.h #include <openssl/md5.h> // Changed CommonCrypto to openssl/md5.h unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Changed CC_MD5_CTX to MD5_CTX MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Still problematic null byte compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Still out of bounds strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> // Changed strings.h to string.h #include <openssl/md5.h> // Changed CommonCrypto to openssl/md5.h unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Changed CC_MD5_CTX to MD5_CTX MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Still problematic null byte compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Still out of bounds strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
CORRECT!
main.c: In function 'compute_md5':
main.c:18:5: warning: 'MD5_Init' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
18 | MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init
| ^~~~~~~~
In file included from main.c:4:
/usr/include/openssl/md5.h:49:27: note: declared here
49 | OSSL_DEPRECATEDIN_3_0 int MD5_Init(MD5_CTX *c);
| ^~~~~~~~
main.c:19:5: warning: 'MD5_Update' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
19 | MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update
| ^~~~~~~~~~
/usr/include/openssl/md5.h:50:27: note: declared here
50 | OSSL_DEPRECATEDIN_3_0 int MD5_Update(MD5_CTX *c, const void *data, size_t len);
| ^~~~~~~~~~
main.c:20:5: warning: 'MD5_Final' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
20 | MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final
| ^~~~~~~~~
/usr/include/openssl/md5.h:51:27: note: declared here
51 | OSSL_DEPRECATEDIN_3_0 int MD5_Final(unsigned char *md, MD5_CTX *c);
| ^~~~~~~~~
main.c: In function 'main':
main.c:30:14: warning: null character(s) preserved in literal
30 | msg[0] = ' '; // Still problematic null byte
| ^
main.c:33:18: warning: null character(s) preserved in literal
33 | result[33] = ' '; // Still out of bounds
| ^
Testing if the previous output contains the string CORRECT!
: True
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> // Changed strings.h to string.h #include <openssl/md5.h> // Changed CommonCrypto to openssl/md5.h unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Changed CC_MD5_CTX to MD5_CTX MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Still problematic null byte compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Still out of bounds strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
Your password is wrong, a
main.c: In function 'compute_md5':
main.c:18:5: warning: 'MD5_Init' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
18 | MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init
| ^~~~~~~~
In file included from main.c:4:
/usr/include/openssl/md5.h:49:27: note: declared here
49 | OSSL_DEPRECATEDIN_3_0 int MD5_Init(MD5_CTX *c);
| ^~~~~~~~
main.c:19:5: warning: 'MD5_Update' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
19 | MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update
| ^~~~~~~~~~
/usr/include/openssl/md5.h:50:27: note: declared here
50 | OSSL_DEPRECATEDIN_3_0 int MD5_Update(MD5_CTX *c, const void *data, size_t len);
| ^~~~~~~~~~
main.c:20:5: warning: 'MD5_Final' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
20 | MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final
| ^~~~~~~~~
/usr/include/openssl/md5.h:51:27: note: declared here
51 | OSSL_DEPRECATEDIN_3_0 int MD5_Final(unsigned char *md, MD5_CTX *c);
| ^~~~~~~~~
main.c: In function 'main':
main.c:30:14: warning: null character(s) preserved in literal
30 | msg[0] = ' '; // Still problematic null byte
| ^
main.c:33:18: warning: null character(s) preserved in literal
33 | result[33] = ' '; // Still out of bounds
| ^
Testing if the previous output contains the string wrong
: True
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> // Changed strings.h to string.h #include <openssl/md5.h> // Changed CommonCrypto to openssl/md5.h unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Changed CC_MD5_CTX to MD5_CTX MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { // Changed CC_MD5_DIGEST_LENGTH to MD5_DIGEST_LENGTH sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Still problematic null byte compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Still out of bounds strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
CORRECT!
main.c: In function 'compute_md5':
main.c:18:5: warning: 'MD5_Init' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
18 | MD5_Init(&md5ctx); // Changed CC_MD5_Init to MD5_Init
| ^~~~~~~~
In file included from main.c:4:
/usr/include/openssl/md5.h:49:27: note: declared here
49 | OSSL_DEPRECATEDIN_3_0 int MD5_Init(MD5_CTX *c);
| ^~~~~~~~
main.c:19:5: warning: 'MD5_Update' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
19 | MD5_Update(&md5ctx, str, strlen(str)); // Changed CC_MD5_Update to MD5_Update
| ^~~~~~~~~~
/usr/include/openssl/md5.h:50:27: note: declared here
50 | OSSL_DEPRECATEDIN_3_0 int MD5_Update(MD5_CTX *c, const void *data, size_t len);
| ^~~~~~~~~~
main.c:20:5: warning: 'MD5_Final' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
20 | MD5_Final(result, &md5ctx); // Changed CC_MD5_Final to MD5_Final
| ^~~~~~~~~
/usr/include/openssl/md5.h:51:27: note: declared here
51 | OSSL_DEPRECATEDIN_3_0 int MD5_Final(unsigned char *md, MD5_CTX *c);
| ^~~~~~~~~
main.c: In function 'main':
main.c:30:14: warning: null character(s) preserved in literal
30 | msg[0] = ' '; // Still problematic null byte
| ^
main.c:33:18: warning: null character(s) preserved in literal
33 | result[33] = ' '; // Still out of bounds
| ^
Testing if the previous output contains the string CORRECT!
: True
Rewrite this c code so it will run on ubuntu. DO NOT FIX ANY BUGS.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <strings.h> #include <CommonCrypto/CommonDigest.h> unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[CC_MD5_DIGEST_LENGTH]; CC_MD5_CTX md5ctx; CC_MD5_Init(&md5ctx); CC_MD5_Update(&md5ctx, str, strlen(str)); CC_MD5_Final(result, &md5ctx); for (int i = 0; i < CC_MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; compute_md5(argv[1], (unsigned char*)result); result[33] = ''; strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
Rewrite this c code so it will run on ubuntu. DO NOT FIX ANY BUGS.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <strings.h> #include <CommonCrypto/CommonDigest.h> unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[CC_MD5_DIGEST_LENGTH]; CC_MD5_CTX md5ctx; CC_MD5_Init(&md5ctx); CC_MD5_Update(&md5ctx, str, strlen(str)); CC_MD5_Final(result, &md5ctx); for (int i = 0; i < CC_MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; compute_md5(argv[1], (unsigned char*)result); result[33] = ''; strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> // Use string.h instead of strings.h #include <openssl/md5.h> // Use OpenSSL's MD5 implementation unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Use MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Use MD5_CTX MD5_Init(&md5ctx); // Use MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update MD5_Final(result, &md5ctx); // Use MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Keep the null byte as is compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Keep the out-of-bounds write strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> // Use string.h instead of strings.h #include <openssl/md5.h> // Use OpenSSL's MD5 implementation unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Use MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Use MD5_CTX MD5_Init(&md5ctx); // Use MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update MD5_Final(result, &md5ctx); // Use MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Keep the null byte as is compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Keep the out-of-bounds write strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> // Use string.h instead of strings.h #include <openssl/md5.h> // Use OpenSSL's MD5 implementation unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Use MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Use MD5_CTX MD5_Init(&md5ctx); // Use MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update MD5_Final(result, &md5ctx); // Use MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Keep the null byte as is compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Keep the out-of-bounds write strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
CORRECT!
main.c: In function 'compute_md5':
main.c:18:5: warning: 'MD5_Init' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
18 | MD5_Init(&md5ctx); // Use MD5_Init
| ^~~~~~~~
In file included from main.c:4:
/usr/include/openssl/md5.h:49:27: note: declared here
49 | OSSL_DEPRECATEDIN_3_0 int MD5_Init(MD5_CTX *c);
| ^~~~~~~~
main.c:19:5: warning: 'MD5_Update' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
19 | MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update
| ^~~~~~~~~~
/usr/include/openssl/md5.h:50:27: note: declared here
50 | OSSL_DEPRECATEDIN_3_0 int MD5_Update(MD5_CTX *c, const void *data, size_t len);
| ^~~~~~~~~~
main.c:20:5: warning: 'MD5_Final' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
20 | MD5_Final(result, &md5ctx); // Use MD5_Final
| ^~~~~~~~~
/usr/include/openssl/md5.h:51:27: note: declared here
51 | OSSL_DEPRECATEDIN_3_0 int MD5_Final(unsigned char *md, MD5_CTX *c);
| ^~~~~~~~~
main.c: In function 'main':
main.c:30:14: warning: null character(s) preserved in literal
30 | msg[0] = ' '; // Keep the null byte as is
| ^
main.c:33:18: warning: null character(s) preserved in literal
33 | result[33] = ' '; // Keep the out-of-bounds write
| ^
Testing if the previous output contains the string CORRECT!
: True
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> // Use string.h instead of strings.h #include <openssl/md5.h> // Use OpenSSL's MD5 implementation unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Use MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Use MD5_CTX MD5_Init(&md5ctx); // Use MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update MD5_Final(result, &md5ctx); // Use MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Keep the null byte as is compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Keep the out-of-bounds write strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
Your password is wrong, a
main.c: In function 'compute_md5':
main.c:18:5: warning: 'MD5_Init' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
18 | MD5_Init(&md5ctx); // Use MD5_Init
| ^~~~~~~~
In file included from main.c:4:
/usr/include/openssl/md5.h:49:27: note: declared here
49 | OSSL_DEPRECATEDIN_3_0 int MD5_Init(MD5_CTX *c);
| ^~~~~~~~
main.c:19:5: warning: 'MD5_Update' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
19 | MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update
| ^~~~~~~~~~
/usr/include/openssl/md5.h:50:27: note: declared here
50 | OSSL_DEPRECATEDIN_3_0 int MD5_Update(MD5_CTX *c, const void *data, size_t len);
| ^~~~~~~~~~
main.c:20:5: warning: 'MD5_Final' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
20 | MD5_Final(result, &md5ctx); // Use MD5_Final
| ^~~~~~~~~
/usr/include/openssl/md5.h:51:27: note: declared here
51 | OSSL_DEPRECATEDIN_3_0 int MD5_Final(unsigned char *md, MD5_CTX *c);
| ^~~~~~~~~
main.c: In function 'main':
main.c:30:14: warning: null character(s) preserved in literal
30 | msg[0] = ' '; // Keep the null byte as is
| ^
main.c:33:18: warning: null character(s) preserved in literal
33 | result[33] = ' '; // Keep the out-of-bounds write
| ^
Testing if the previous output contains the string wrong
: True
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <stdio.h> #include <string.h> // Use string.h instead of strings.h #include <openssl/md5.h> // Use OpenSSL's MD5 implementation unsigned char memory[1<<20]; void* malloc_ptr = (void*)&memory; void* my_malloc(int size) { void* ptr = malloc_ptr; malloc_ptr += size; return (void*)ptr; } void compute_md5(char *str, unsigned char *hex_result) { unsigned char result[MD5_DIGEST_LENGTH]; // Use MD5_DIGEST_LENGTH MD5_CTX md5ctx; // Use MD5_CTX MD5_Init(&md5ctx); // Use MD5_Init MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update MD5_Final(result, &md5ctx); // Use MD5_Final for (int i = 0; i < MD5_DIGEST_LENGTH; i++) { sprintf((char*)(hex_result + (i * 2)), "%02x", result[i]); } } int main(int argc, char** argv) { char* msg = (char*)my_malloc(32); char* result = (char*)my_malloc(33); msg[0] = ''; // Keep the null byte as is compute_md5(argv[1], (unsigned char*)result); result[33] = ''; // Keep the out-of-bounds write strcat(msg, "Your password is wrong, "); strcat(msg, argv[2]); if (strcmp(result, "13bd041ac6e683f0c8ddba41eeed9e67") == 0) { puts("CORRECT!"); return 0; } else { puts(msg); return 1; } } |
CORRECT!
main.c: In function 'compute_md5':
main.c:18:5: warning: 'MD5_Init' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
18 | MD5_Init(&md5ctx); // Use MD5_Init
| ^~~~~~~~
In file included from main.c:4:
/usr/include/openssl/md5.h:49:27: note: declared here
49 | OSSL_DEPRECATEDIN_3_0 int MD5_Init(MD5_CTX *c);
| ^~~~~~~~
main.c:19:5: warning: 'MD5_Update' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
19 | MD5_Update(&md5ctx, str, strlen(str)); // Use MD5_Update
| ^~~~~~~~~~
/usr/include/openssl/md5.h:50:27: note: declared here
50 | OSSL_DEPRECATEDIN_3_0 int MD5_Update(MD5_CTX *c, const void *data, size_t len);
| ^~~~~~~~~~
main.c:20:5: warning: 'MD5_Final' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
20 | MD5_Final(result, &md5ctx); // Use MD5_Final
| ^~~~~~~~~
/usr/include/openssl/md5.h:51:27: note: declared here
51 | OSSL_DEPRECATEDIN_3_0 int MD5_Final(unsigned char *md, MD5_CTX *c);
| ^~~~~~~~~
main.c: In function 'main':
main.c:30:14: warning: null character(s) preserved in literal
30 | msg[0] = ' '; // Keep the null byte as is
| ^
main.c:33:18: warning: null character(s) preserved in literal
33 | result[33] = ' '; // Keep the out-of-bounds write
| ^
Testing if the previous output contains the string CORRECT!
: True