Hi
yes, AN11241 is SW lib, you can port it to LPC4337 to implement AES encryption.
But please note:
The library has been tested on the following targets: LPC11Axx (Cortex-M0 based), LPC1769 (Cortex-M3 based). For porting the library to other targets, the user may extend or modify the target definition in the cipher.h file.
For more, see AN11241.
Have a nice day,
Jun Zhang