function encryption_encrypt

6.x encryption.module encryption_encrypt($plain_contents)
2 calls to encryption_encrypt()
content_add_new_uploaded_file in modules/content/content.module
bool_replace_existing means should we replace an existing file (based on filename) with this new one? Instead of creating an INSERT, that is.
student_files_handle_upload in modules/student_files/student_files.module
Handles the upload of a file which we assume is located at $_FILES["student_file_upload_file"], or the provided $file array.


modules/encryption/encryption.module, line 305
This is the main module file for the encryption module.


function encryption_encrypt($plain_contents) {

  $cipher = encryption_get_cipher_algorithm();
  $key = encryption_get_key();

  $plaintext = base64_encode($plain_contents); // convert to base64 so binary will work as well as text files.
  $ivlen = openssl_cipher_iv_length($cipher);
  $iv = openssl_random_pseudo_bytes($ivlen);

  // replace OPENSSL_RAW_DATA & $iv with 0 & bin2hex($iv) for hex cipher (eg. for transmission over internet)
  $ciphertext_raw = openssl_encrypt($plaintext, $cipher, $key, OPENSSL_RAW_DATA, $iv);

  // increase security with hashed cipher; (hex or base64 printable eg. for transmission over internet)
  $hmac = hash_hmac("sha256", $ciphertext_raw, $key, true);
  return base64_encode($iv . $hmac . $ciphertext_raw);