问在Botan中，什么是最高性能的SQLite加密编解码器？

EN

/*These constants can be used to tweak the codec behavior as follows */

//BLOCK_CIPHER_STR: Cipher and mode used for encrypting the database
//make sure to add "/NoPadding" for modes that use padding schemes
const string BLOCK_CIPHER_STR = "Twofish/XTS";

//PBKDF_STR: Key derivation function used to derive both the encryption
//and IV derivation keys from the given database passphrase
const string PBKDF_STR = "PBKDF2(SHA-160)";

//SALT_STR: Hard coded salt used to derive the key from the passphrase.
const string SALT_STR = "&g#nB'9]";

//SALT_SIZE: Size of the salt in bytes (as given in SALT_STR)
const int SALT_SIZE = 64/8; //64 bit, 8 byte salt

//MAC_STR: CMAC used to derive the IV that is used for db page
//encryption
const string MAC_STR = "CMAC(Twofish)";

//PBKDF_ITERATIONS: Number of hash iterations used in the key derivation
//process.
const int PBKDF_ITERATIONS = 10000;

//KEY_SIZE: Size of the encryption key. Note that XTS splits the key
//between two ciphers, so if you're using XTS, double the intended key
//size. (ie, "AES-128/XTS" should have a 256 bit KEY_SIZE)
const int KEY_SIZE = 512/8; //512 bit, 64 byte key. (256 bit XTS key)

//IV_DERIVATION_KEY_SIZE: Size of the key used with the CMAC (MAC_STR)
//above.
const int IV_DERIVATION_KEY_SIZE = 256/8; //256 bit, 32 byte key

//This is definited in sqlite.h and very unlikely to change
#define SQLITE_MAX_PAGE_SIZE 32768