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Showing results for tags 'encryption'.
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I am trying to learn how to use encryption and decryption using the built-in libsodium.dll module I have for PHP 8.3.8 and IIS 10+, however, I am unable to get it to work; I am getting this error: Here is the code: <?php // PECL libsodium 0.2.1 and newer /** * Found at <a href="https://stackoverflow.com/questions/3422759/php-aes-encrypt-decrypt"> * https://stackoverflow.com/questions/3422759/php-aes-encrypt-decrypt</a> */ /** * Encrypt a message * * @param string $message - message to encrypt * @param string $key - encryption key * @return string */ function safeEncrypt($message, $key) { $nonce = \Sodium\randombytes_buf( \Sodium\CRYPTO_SECRETBOX_NONCEBYTES ); return base64_encode( $nonce. \Sodium\crypto_secretbox( $message, $nonce, $key ) ); } /** * Decrypt a message * * @param string $encrypted - message encrypted with safeEncrypt() * @param string $key - encryption key * @return string */ function safeDecrypt($encrypted, $key) { $decoded = base64_decode($encrypted); $nonce = mb_substr($decoded, 0, \Sodium\CRYPTO_SECRETBOX_NONCEBYTES, '8bit'); $ciphertext = mb_substr($decoded, \Sodium\CRYPTO_SECRETBOX_NONCEBYTES, null, '8bit'); return \Sodium\crypto_secretbox_open( $ciphertext, $nonce, $key ); } ?> <?php require('./globals/crypto.php'); $key = \Sodium\random_bytes(\Sodium\CRYPTO_SECRETBOX_KEYBYTES); $str = 'Lorem ipsum dolor sit amet. The quick brown fox jumped over the lazy dog. Lorem ipsum dolor sit amet'; $encStr = safeEncrypt($str, $key); $decStr = safeDecrypt($encStr, $key); ?> <!DOCTYPE html> <html> <head> <title>Blah</title> </head> <body> <p> Original string: <?php echo $str ?><br /><br /> Encrypted string: <?php echo $encStr ?><br /><br /> Decrypted string: <?php echo $decStr ?><br /><br /> </p> </body> </html> What else should I be doing to ensure encryption and decryption works? Thanks -
Say I have a form field where I input any text(numbers,text,symbols, or mixed). I want to encrypt that input into 16 characters long encryption string that includes at least one uppercase letter, one lowercase letter, one number and one special character? How can that be done? Also I want to decrypt it back to original input as well. Can that be one?
