'Not enought memory' error

Projects Programming
1

Hi, I'm doing an example exercise for encryption and decryption using WolfSSL.

#include <wolfssl.h>
#include <wolfssl/wolfcrypt/aes.h>

 
void setup(void){

}
 
void loop(void){


Aes enc;

int ret = 0;

byte key[] = {"0123456789abcdef"};

byte iv[]  = {"1234567890abcdef"};

String plain = "hola mundo";


if (ret = wc_AesSetKey(&enc, key, AES_BLOCK_SIZE, iv, AES_ENCRYPTION) != 0) {

// failed to set aes key

}

}

The trouble is the call to the function 'wc_AesSetKey' produces a 'not enought memory' arduino error.

If I comment function, it gets the message: "Global variables use 35 bytes (1%) of dynamic memory, leaving 2,013 bytes for Local variables Maximum is 2,048 bytes.."

But if the code is complete, I get: "Global variables use 2,137 bytes (104%) of dynamic memory, leaving -89 Maximum bytes for the local variables is 2,048 bytes..
processing.app.debug.RunnerException: Not enough memory; http://www.arduino.cc/en/Guide/Troubleshooting#size see for tips on Reducing your footprint.
at cc.arduino.Compiler.size (Compiler.java:338)
at cc.arduino.Compiler.build (Compiler.java:158)
at processing.app.Sketch.build (Sketch.java:1111)
at processing.app.Sketch.exportApplet (Sketch.java:1146)
at processing.app.Sketch.exportApplet (Sketch.java:1132)
processing.app.Editor at $ DefaultExportHandler.run (Editor.java:2409)
at java.lang.Thread.run (Thread.java:745)
Not enough memory; http://www.arduino.cc/en/Guide/Troubleshooting#size see for tips on Reducing your footprint. "

Any suggestion for fix it? Thanks for your replies in advance.

2

The library is using too much memory for the Arduino UNO. You will have to re-write the library or use an Arduino with more memory, like the Arduino MEGA.