From a996f78277d5ba5adccb0daa535bc2494350975c Mon Sep 17 00:00:00 2001
From: srdusr <trevorgray@srdusr.com>
Date: Fri, 26 Sep 2025 12:40:58 +0200
Subject: Initial Commit

---
 main.c | 581 -----------------------------------------------------------------
 1 file changed, 581 deletions(-)
 delete mode 100644 main.c

(limited to 'main.c')

diff --git a/main.c b/main.c
deleted file mode 100644
index 079a9e7..0000000
--- a/main.c
+++ /dev/null
@@ -1,581 +0,0 @@
-// 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)
-
-#include "main.h"
-
-struct Password passwords[MAX_PASSWORDS];
-int numPasswords = 0;
-
-FILE *log_file;
-
-void log_message(const char *message) {
-  if (log_file == NULL) {
-    printf("Error: Log file not available.\n");
-    return;
-  }
-
-  time_t current_time;
-  struct tm *time_info;
-  char time_string[80];
-
-  time(&current_time);
-  time_info = localtime(&current_time);
-
-  strftime(time_string, sizeof(time_string), "[%Y-%m-%d %H:%M:%S] ", time_info);
-  fprintf(log_file, "%s %s\n", time_string,
-          message); // Print timestamp and message
-}
-
-void initialize_log() {
-  log_file = fopen("cerberus.log", "a");
-  if (log_file == NULL) {
-    printf("Error: Could not open log file.\n");
-  } else {
-    log_message("=== cerberus log ==="); // Initial log message
-  }
-}
-
-void close_log() {
-  if (log_file != NULL) {
-    fclose(log_file);
-  }
-}
-
-void error_exit(const char *error_message) {
-  log_message(error_message);
-  if (log_file != NULL) {
-    fclose(log_file);
-  }
-  exit(1);
-}
-
-void clear_input_buffer() {
-  int c;
-  while ((c = getchar()) != '\n' && c != EOF)
-    ;
-}
-
-void check_password_policy(const char *password) {
-  int length = strlen(password);
-  if (length < 8) {
-    error_exit("Password must be at least 8 characters long.");
-  }
-
-  bool has_upper = false, has_lower = false, has_digit = false,
-       has_special = false;
-  for (int i = 0; i < length; i++) {
-    if (isupper(password[i])) {
-      has_upper = true;
-    } else if (islower(password[i])) {
-      has_lower = true;
-    } else if (isdigit(password[i])) {
-      has_digit = true;
-    } else {
-      has_special = true;
-    }
-  }
-
-  if (!has_upper || !has_lower || !has_digit || !has_special) {
-    error_exit("Password must contain at least one uppercase letter, one "
-               "lowercase letter, one digit, and one special character.");
-  }
-}
-
-void generate_password(char *password, int length) {
-  if (length < 8 || length > MAX_PASSWORD_LENGTH - 1) {
-    printf("Invalid password length. Please enter a length between 8 and %d.\n",
-           MAX_PASSWORD_LENGTH - 1);
-    return;
-  }
-
-  char charset[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456"
-                   "789!@#$%^&*()-_=+[]{}|;:',.<>?";
-  int charset_size = strlen(charset);
-
-  srand(time(NULL));
-
-  // Initialize flags to check if each required character type is included
-  bool has_upper = false, has_lower = false, has_digit = false,
-       has_special = false;
-
-  // Create password with at least one character from each required type
-  password[0] = charset[rand() % 26];      // at least one uppercase letter
-  password[1] = charset[26 + rand() % 26]; // at least one lowercase letter
-  password[2] = charset[52 + rand() % 10]; // at least one digit
-  password[3] = charset[62 + rand() % 14]; // at least one special character
-
-  // Fill the rest of the password randomly from the character set
-  for (int i = 4; i < length; i++) {
-    password[i] = charset[rand() % charset_size];
-  }
-
-  password[length] = '\0';
-
-  // Shuffle the password characters
-  for (int i = 0; i < length; i++) {
-    int j = rand() % length;
-    char temp = password[i];
-    password[i] = password[j];
-    password[j] = temp;
-  }
-
-  printf("Generated Password: %s\n", password);
-}
-
-void derive_key(unsigned char *key, const char *password, unsigned char *salt) {
-  PKCS5_PBKDF2_HMAC(password, strlen(password), salt, SALT_SIZE,
-                    PBKDF2_ITERATIONS, EVP_sha256(), AES_KEY_SIZE, key);
-}
-
-void encrypt_password(struct Password *password, const char *user_password) {
-  unsigned char iv[AES_BLOCK_SIZE];
-  unsigned char encrypted_password[MAX_PASSWORD_LENGTH];
-
-  RAND_bytes(iv, AES_BLOCK_SIZE);
-
-  unsigned char key[AES_KEY_SIZE];
-  derive_key(key, user_password, iv);
-
-  EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new();
-  EVP_EncryptInit_ex(ctx, EVP_aes_256_gcm(), NULL, key, iv);
-
-  int outlen, tmplen;
-  EVP_EncryptUpdate(ctx, encrypted_password, &outlen,
-                    (unsigned char *)password->password,
-                    strlen(password->password));
-  EVP_EncryptFinal_ex(ctx, encrypted_password + outlen, &tmplen);
-
-  memcpy(password->password, encrypted_password, outlen + tmplen);
-  memcpy(password->username, iv, AES_BLOCK_SIZE);
-
-  EVP_CIPHER_CTX_free(ctx);
-}
-
-void decrypt_password(struct Password *password, const char *user_password) {
-  unsigned char iv[AES_BLOCK_SIZE];
-  unsigned char decrypted_password[MAX_PASSWORD_LENGTH];
-  int decrypted_len = 0;
-
-  memcpy(iv, password->username, AES_BLOCK_SIZE);
-
-  unsigned char key[AES_KEY_SIZE];
-  derive_key(key, user_password, iv);
-
-  EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new();
-  EVP_DecryptInit_ex(ctx, EVP_aes_256_gcm(), NULL, key, iv);
-
-  int outlen, tmplen;
-  EVP_DecryptUpdate(ctx, decrypted_password, &outlen,
-                    (unsigned char *)password->password,
-                    strlen(password->password));
-  EVP_DecryptFinal_ex(ctx, decrypted_password + outlen, &tmplen);
-
-  decrypted_password[outlen + tmplen] = '\0';
-
-  strcpy(password->password, (char *)decrypted_password);
-
-  EVP_CIPHER_CTX_free(ctx);
-}
-
-void save_password(struct Password *password, const char *website,
-                   const char *dir, const char *user_password) {
-  unsigned char iv[AES_BLOCK_SIZE];
-  RAND_bytes(iv, AES_BLOCK_SIZE);
-
-  unsigned char key[AES_KEY_SIZE];
-  derive_key(key, user_password, iv);
-
-  unsigned char encrypted_password[MAX_PASSWORD_LENGTH];
-  EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new();
-  EVP_EncryptInit_ex(ctx, EVP_aes_256_gcm(), NULL, key, iv);
-
-  int outlen, tmplen;
-  EVP_EncryptUpdate(ctx, encrypted_password, &outlen,
-                    (unsigned char *)password->password,
-                    strlen(password->password));
-  EVP_EncryptFinal_ex(ctx, encrypted_password + outlen, &tmplen);
-
-  char filename[256];
-  snprintf(filename, sizeof(filename), "%s/%s_%s.dat", dir, website,
-           password->username);
-  FILE *fp = fopen(filename, "wb");
-  if (fp == NULL) {
-    printf("Error: could not open file %s for writing.\n", filename);
-    return;
-  }
-  fwrite(iv, sizeof(iv), 1, fp);
-  fwrite(encrypted_password, outlen + tmplen, 1, fp);
-
-  fclose(fp);
-  EVP_CIPHER_CTX_free(ctx);
-}
-
-void edit_password(struct Password *password) {
-  int choice;
-  printf("\nEdit Password:\n");
-  printf("1. Website: %s\n", password->website);
-  printf("2. Username: %s\n", password->username);
-  printf("3. Password: %s\n", password->password);
-  printf("4. Cancel\n");
-  printf("Enter your choice: ");
-  scanf("%d", &choice);
-  clear_input_buffer();
-
-  switch (choice) {
-  case 1: {
-    char old_filename[256];
-    snprintf(old_filename, sizeof(old_filename), "tmp/%s_%s.dat",
-             password->website, password->username);
-    if (remove(old_filename) != 0) {
-      printf("Error deleting old password file.\n");
-    }
-
-    printf("Enter new website: ");
-    fgets(password->website, sizeof(password->website), stdin);
-    password->website[strcspn(password->website, "\n")] =
-        0; // Remove newline character
-    printf("Website updated.\n");
-    save_password(password, password->website, "tmp", "user_password");
-    break;
-  }
-  case 2: {
-    char old_filename[256];
-    snprintf(old_filename, sizeof(old_filename), "tmp/%s_%s.dat",
-             password->website, password->username);
-    if (remove(old_filename) != 0) {
-      printf("Error deleting old password file.\n");
-    }
-
-    printf("Enter new username: ");
-    fgets(password->username, sizeof(password->username), stdin);
-    password->username[strcspn(password->username, "\n")] =
-        0; // Remove newline character
-    printf("Username updated.\n");
-    save_password(password, password->website, "tmp", "user_password");
-    break;
-  }
-  case 3: {
-    int length;
-    do {
-      printf("Enter new password length: ");
-      scanf("%d", &length);
-      clear_input_buffer();
-      if (length < 8 || length > MAX_PASSWORD_LENGTH - 1) {
-        printf("Invalid password length. Please enter a length between 8 and "
-               "%d.\n",
-               MAX_PASSWORD_LENGTH - 1);
-      }
-    } while (length < 8 || length > MAX_PASSWORD_LENGTH - 1);
-    generate_password(password->password, length);
-    printf("Password updated.\n");
-    save_password(password, password->website, "tmp", "user_password");
-    break;
-  }
-  case 4:
-    printf("Canceled.\n");
-    break;
-  default:
-    printf("Invalid choice.\n");
-    break;
-  }
-}
-
-void load_passwords(const char *dir, const char *user_password) {
-  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;
-
-          unsigned char iv[AES_BLOCK_SIZE];
-          fread(iv, sizeof(iv), 1, file);
-
-          unsigned char encrypted_password[MAX_PASSWORD_LENGTH];
-          int len = fread(encrypted_password, 1, MAX_PASSWORD_LENGTH, file);
-
-          unsigned char key[AES_KEY_SIZE];
-          derive_key(key, user_password, iv);
-
-          unsigned char decrypted_password[MAX_PASSWORD_LENGTH];
-          EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new();
-          EVP_DecryptInit_ex(ctx, EVP_aes_256_gcm(), NULL, key, iv);
-
-          int outlen, tmplen;
-          EVP_DecryptUpdate(ctx, decrypted_password, &outlen,
-                            encrypted_password, len);
-          EVP_DecryptFinal_ex(ctx, decrypted_password + outlen, &tmplen);
-
-          decrypted_password[outlen + tmplen] = '\0';
-
-          fclose(file);
-          EVP_CIPHER_CTX_free(ctx);
-
-          // Extract website and username from filename
-          char website[MAX_WEBSITE_LENGTH];
-          char username[MAX_USERNAME_LENGTH];
-          sscanf(dir_entry->d_name, "%[^_]_%[^.]", website, username);
-
-          // Copy decrypted password to password field
-          strncpy(password.website, website, MAX_WEBSITE_LENGTH - 1);
-          password.website[MAX_WEBSITE_LENGTH - 1] = '\0';
-          strncpy(password.username, username, MAX_USERNAME_LENGTH - 1);
-          password.username[MAX_USERNAME_LENGTH - 1] = '\0';
-          strncpy(password.password, decrypted_password,
-                  MAX_PASSWORD_LENGTH - 1);
-          password.password[MAX_PASSWORD_LENGTH - 1] = '\0';
-
-          passwords[count++] = password;
-          printf("%d. Website: %s, Username: %s\n", count, password.website,
-                 password.username);
-        }
-      }
-    }
-    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");
-  }
-}
-
-void print_ascii_art(const char *filename) {
-  FILE *file = fopen(filename, "r");
-  if (file == NULL) {
-    printf("Unable to open ASCII art file.\n");
-    return;
-  }
-
-  // Get console width
-  struct winsize w;
-  ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
-  int console_width = w.ws_col;
-
-  char line[256];
-  while (fgets(line, sizeof(line), file)) {
-    // Calculate padding for centering
-    int padding = (console_width - strlen(line)) / 2;
-    if (padding > 0) {
-      for (int i = 0; i < padding; i++) {
-        printf(" ");
-      }
-    }
-    printf("%s", line);
-  }
-
-  fclose(file);
-}
-
-int main() {
-  initialize_log();
-
-  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;
-
-    // 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;
-    }
-  }
-
-  // Print ASCII art
-  print_ascii_art("ascii-art.txt");
-
-  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);
-    clear_input_buffer(); // Clear input buffer after scanf
-
-    switch (choice) {
-    case 1: {
-      struct Password password;
-      int length;
-      do {
-        printf("Enter password length: ");
-        scanf("%d", &length);
-        clear_input_buffer();
-        if (length < 8 || length > MAX_PASSWORD_LENGTH - 1) {
-          printf("Invalid password length. Please enter a length between 8 and "
-                 "%d.\n",
-                 MAX_PASSWORD_LENGTH - 1);
-        }
-      } while (length < 8 || length > MAX_PASSWORD_LENGTH - 1);
-      generate_password(password.password, length);
-      printf("Enter website: ");
-      fgets(password.website, sizeof(password.website), stdin);
-      password.website[strcspn(password.website, "\n")] =
-          0; // Remove newline character
-      printf("Enter username: ");
-      fgets(password.username, sizeof(password.username), stdin);
-      password.username[strcspn(password.username, "\n")] =
-          0; // Remove newline character
-      save_password(&password, password.website, dir, user_password);
-      printf("Password information saved to %s\n", password.website);
-      break;
-    }
-    case 2: {
-      load_passwords(dir, user_password);
-      printf("Enter the number of the password to view or 0 to cancel: ");
-      int selection;
-      scanf("%d", &selection);
-      clear_input_buffer();
-      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("1. Copy Username and/or Password\n");
-        printf("2. Edit the Password\n");
-        printf("3. Delete the Password\n");
-        printf("0. Cancel\n");
-        printf("Enter your choice: ");
-        int copy_choice;
-        scanf("%d", &copy_choice);
-        clear_input_buffer();
-        switch (copy_choice) {
-        case 1:
-          // Provide options for copying username and/or password
-          printf("1. Copy Username and Password\n");
-          printf("2. Copy just the Password\n");
-          printf("3. Copy just the Username\n");
-          printf("0. Cancel\n");
-          printf("Enter your choice: ");
-          int sub_copy_choice;
-          scanf("%d", &sub_copy_choice);
-          clear_input_buffer();
-          switch (sub_copy_choice) {
-          case 1:
-            // Copy both username and password
-            {
-              char copy_text[MAX_PASSWORD_LENGTH * 2 +
-                             2]; // Max length of both plus space
-              snprintf(copy_text, sizeof(copy_text),
-                       "Username: %s, Password: %s", selected_password.username,
-                       selected_password.password);
-              copy_to_clipboard(copy_text);
-              printf("Username and Password copied to clipboard.\n");
-            }
-            break;
-          case 2:
-            // Copy just the password
-            copy_to_clipboard(selected_password.password);
-            printf("Password copied to clipboard.\n");
-            break;
-          case 3:
-            // Copy just the username
-            copy_to_clipboard(selected_password.username);
-            printf("Username copied to clipboard.\n");
-            break;
-          case 0:
-            printf("Canceled.\n");
-            break;
-          default:
-            printf("Invalid choice.\n");
-          }
-          break;
-        case 2:
-          edit_password(&selected_password);
-          save_password(&selected_password, selected_password.website, dir,
-                        user_password);
-          printf("Password updated.\n");
-          break;
-        case 3: {
-          struct Password selected_password = passwords[selection - 1];
-          printf("Are you sure you want to delete this password? (y/n): ");
-          char confirm;
-          scanf(" %c", &confirm);
-          clear_input_buffer();
-          if (confirm == 'y' || confirm == 'Y') {
-            char filename[256];
-            snprintf(filename, sizeof(filename), "%s/%s_%s.dat", dir,
-                     selected_password.website, selected_password.username);
-            if (remove(filename) != 0) {
-              printf("Error deleting password file.\n");
-            } else {
-              printf("Password deleted.\n");
-              // Shift remaining passwords to fill the gap
-              for (int i = selection - 1; i < numPasswords - 1; i++) {
-                passwords[i] = passwords[i + 1];
-              }
-              numPasswords--;
-            }
-          } else {
-            printf("Password not deleted.\n");
-          }
-          break;
-        }
-
-        case 0:
-          printf("Canceled.\n");
-          break;
-        default:
-          printf("Invalid choice.\n");
-        }
-      } else if (selection != 0) {
-        printf("Invalid selection.\n");
-      }
-      break;
-    }
-    case 3:
-      printf("Exiting program...\n");
-      close_log();
-      return 0;
-    default:
-      printf("Invalid choice. Please enter 1, 2, or 3.\n");
-    }
-  }
-
-  close_log();
-  return 0;
-}
-- 
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