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// TODO: Secret stored in memory must be encrypted with a key derived from the
// user password or consider making password manager stateless (no passwords
// stored locally)
// TODO: Replace CBC with GCM or CCM to prevent padding attacks
// TODO: Have ascii art of a cerberus on start menu/page
#include "main.h"
struct Password passwords[MAX_PASSWORDS];
int numPasswords = 0;
void generate_password(char *password, int length) {
// Define the character set for the password
char charset[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456"
"789!@#$%^&*-_=+{}[]|;:',.<>/?";
int charset_size = strlen(charset);
// Seed the random number generator
srand(time(NULL));
for (int i = 0; i < length; i++) {
int index = rand() % charset_size;
password[i] = charset[index];
}
password[length] = '\0'; // Null-terminate the password
printf("Generated Password: %s\n", password);
}
void save_password(struct Password *password, const char *dir) {
// Save the password information to a file
FILE *fp;
char filename[256];
snprintf(filename, sizeof(filename), "%s/%s.dat", dir, password->website);
fp = fopen(filename, "wb");
if (fp == NULL) {
printf("Error: could not open file %s for writing.\n", filename);
return;
}
// Write the password to the file
fwrite(password, sizeof(struct Password), 1, fp);
fclose(fp);
}
void load_passwords(const char *dir) {
printf("Available Passwords:\n");
DIR *d;
struct dirent *dir_entry;
d = opendir(dir);
if (d) {
int count = 0;
while ((dir_entry = readdir(d)) != NULL) {
if (dir_entry->d_type == DT_REG) { // If it's a regular file
char filename[256];
snprintf(filename, sizeof(filename), "%s/%s", dir, dir_entry->d_name);
FILE *file = fopen(filename, "rb");
if (file != NULL) {
struct Password password;
fread(&password, sizeof(struct Password), 1, file);
// Null-terminate the strings
password.website[MAX_WEBSITE_LENGTH - 1] = '\0';
password.username[MAX_USERNAME_LENGTH - 1] = '\0';
password.password[MAX_PASSWORD_LENGTH - 1] = '\0';
passwords[count++] = password;
printf("%d. Website: %s, Username: %s\n", count, password.website,
password.username);
fclose(file);
}
}
}
numPasswords = count;
closedir(d);
if (count == 0) {
printf("No passwords found.\n");
}
}
}
void copy_to_clipboard(char *text) {
// Use xclip command to copy text to clipboard
FILE *pipe = popen("xclip -selection clipboard", "w");
if (pipe != NULL) {
fprintf(pipe, "%s", text);
pclose(pipe);
printf("Copied to clipboard: %s\n", text);
} else {
printf("Error: Could not copy to clipboard.\n");
}
}
int main() {
const char *dir = "tmp"; // Directory to store password files
mkdir(dir, 0700); // Create directory if it doesn't exist
char user_password[MAX_PASSWORD_LENGTH];
FILE *key_file = fopen("master.key", "rb");
if (key_file == NULL) {
printf("Enter your new master password: ");
fgets(user_password, sizeof(user_password), stdin);
user_password[strcspn(user_password, "\n")] = 0; // Remove newline character
// Save master password to file
key_file = fopen("master.key", "wb");
if (key_file == NULL) {
printf("Error: Could not create master password file.\n");
return 1;
}
fwrite(user_password, sizeof(user_password), 1, key_file);
fclose(key_file);
} else {
// If master key exists, ask for the password
printf("Enter your master password: ");
fgets(user_password, sizeof(user_password), stdin);
user_password[strcspn(user_password, "\n")] = 0; // Remove newline character
// Check if the entered password matches the stored master password
char stored_password[MAX_PASSWORD_LENGTH];
fread(stored_password, sizeof(stored_password), 1, key_file);
fclose(key_file);
if (strcmp(user_password, stored_password) != 0) {
printf("Invalid master password. Exiting...\n");
return 1;
}
}
int choice;
while (1) {
printf("\n1. Create New Password\n");
printf("2. Show Passwords\n");
printf("3. Exit\n");
printf("Enter your choice: ");
scanf("%d", &choice);
switch (choice) {
case 1: {
if (numPasswords >= MAX_PASSWORDS) {
printf("Maximum number of passwords reached.\n");
break;
}
struct Password password;
int length;
printf("Enter password length: ");
scanf("%d", &length);
generate_password(password.password, length);
printf("Enter website: ");
scanf("%s", password.website);
printf("Enter username: ");
scanf("%s", password.username);
save_password(&password, dir);
printf("Password information saved to %s\n", password.website);
passwords[numPasswords++] = password;
break;
}
case 2: {
load_passwords(dir);
printf("Enter the number of the password to copy (0 to cancel): ");
int selection;
scanf("%d", &selection);
if (selection > 0 && selection <= numPasswords) {
struct Password selected_password = passwords[selection - 1];
printf("Selected Password:\n");
printf("- Website: %s\n", selected_password.website);
printf("- Username: %s\n", selected_password.username);
printf("- Password: %s\n", selected_password.password);
printf("Copy to clipboard? (1 for Password, 2 for Username, 0 to "
"cancel): ");
int copy_choice;
scanf("%d", ©_choice);
switch (copy_choice) {
case 1:
copy_to_clipboard(selected_password.password);
break;
case 2:
copy_to_clipboard(selected_password.username);
break;
default:
printf("Canceled.\n");
}
} else if (selection != 0) {
printf("Invalid selection.\n");
}
break;
}
case 3:
printf("Exiting program...\n");
return 0;
default:
printf("Invalid choice. Please enter 1, 2, or 3.\n");
}
}
return 0;
}
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