使用php加密和解密

Question

I have the following code using for encryption

$key="company";
$value['service_id']="edit_details";
$encrypted_string=trim(base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $value['service_id'], MCRYPT_MODE_ECB, mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND))));

and i used the below code for decryption

$key="company";
$serviceId=$encrypted_string;
$decrypted_string=trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, base64_decode($serviceId), MCRYPT_MODE_ECB, mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND)));

I am not getting the original string edit_details.

I don't what is wrong in this.

Answer 1

So if you are getting the value by $_GET use like this

$encrypted_string = trim(urlencode(base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $value['service_id'], MCRYPT_MODE_ECB, mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND)))));

when base64_encoded data is transferred , it may get corrupted if the data contains characters such as ?+/. so urlencode() is needed when a data is transferred.