[ Source ] Gamespy Arcade password decoder

**~Fleck** on Tue Jun 30, 2009 6:40 am

Code:: #include <stdio.h> #include <stdlib.h> #include <string.h> #define VER "0.1" #define BUFFSZ 4096 #define NICK "usr_nick=" #define PASS "usr_pass=" #ifndef WIN32 #define strnicmp strncasecmp #endif #ifndef u_char #define u_char unsigned char #endif void gsa_pwd(u_char *pwd); void std_err(void); int main(int argc, char *argv[]) { FILE *fd; u_char *buff, *ptr, *limit; setbuf(stdout, NULL); fputs("\n" "Gamespy Arcade password decoder "VER"\n" "by Luigi Auriemma\n" "e-mail: aluigi@autistici.org\n" "web: aluigi.org\n" "\n", stdout); if(argc < 2) { printf("\nUsage: %s <settings.cfg>\n" "\n" "settings.cfg is located in the directory Profiles\\ID where ID is the profile number\n" "\n", argv[0]); fputs("\n Press RETURN to exit\n", stdout); fgetc(stdin); exit(1); } printf("\nOpening file %s\n\n", argv[1]); fd = fopen(argv[1], "rb"); if(!fd) std_err(); buff = malloc(BUFFSZ + 1); if(!buff) std_err(); while(1) { if(!fgets(buff, BUFFSZ, fd)) break; if(!strnicmp(buff, NICK, sizeof(NICK) - 1)) { printf("Nickname: %s", buff + sizeof(NICK) - 1); } else if(!strnicmp(buff, PASS, sizeof(PASS) - 1)) { ptr = buff + sizeof(PASS) - 1; if(*ptr == 0xab) { // new method, encoded ptr++; limit = strchr(ptr, 0xbb); if(limit) *limit = 0; gsa_pwd(ptr); } else { // old method for(limit = ptr; *limit > 0xd; limit++); *limit = 0; } printf("Password: %s\n", ptr); } } fclose(fd); fputs("\n\n Press RETURN to exit\n", stdout); fgetc(stdin); return(0); } void gsa_pwd(u_char *pwd) { u_char *out; int len, tmp; out = pwd; len = strlen(pwd) >> 1; while(len--) { tmp = *pwd++; tmp = *pwd++ - tmp; if(tmp < 0) tmp += 0x5f; *out++ = tmp + 0x20; } *out = 0; } void std_err(void) { perror("\nError"); fputs("\n Press RETURN to exit\n", stdout); fgetc(stdin); exit(1); }