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Hi there!

I get this error while trying to build for BLE Nano:

/Users/luposlip/Dropbox/ArduinoWS/2015/libraries/DES/DES.cpp: In member function 'void DES::tdesCbcEncipher(byte*, byte*)':
/Users/luposlip/Dropbox/ArduinoWS/2015/libraries/DES/DES.cpp:478:21: error: 'printf_P' was not declared in this scope
  printf_P(PSTR("\n"));
                     ^
/Users/luposlip/Dropbox/ArduinoWS/2015/libraries/DES/DES.cpp: In member function 'void DES::tdesCbcDecipher(byte*, byte*)':
/Users/luposlip/Dropbox/ArduinoWS/2015/libraries/DES/DES.cpp:511:21: error: 'printf_P' was not declared in this scope
  printf_P(PSTR("\n"));
                     ^
libraries/DES/DES.cpp: In member function 'void DES::printArray(byte*, bool)':
libraries/DES/DES.cpp:549:40: error: 'printf_P' was not declared in this scope
     printf_P(PSTR("%c"),output[j*8 + i]);
                                        ^
libraries/DES/DES.cpp:552:22: error: 'printf_P' was not declared in this scope
   printf_P(PSTR("\n"));
                      ^
libraries/DES/DES.cpp: In member function 'void DES::printArray(byte*, int)':
libraries/DES/DES.cpp:561:34: error: 'printf_P' was not declared in this scope
     printf_P(PSTR("%x"),output[i]);
                                  ^
libraries/DES/DES.cpp:563:22: error: 'printf_P' was not declared in this scope
   printf_P(PSTR("\n"));
                      ^
Error compiling.

I'm trying to compile the simple DES example:
https://github.com/Octoate/ArduinoDES/tree/master/examples/DESexample

Any ideas?

Best,
Henrik

In function '__base_ctor .constprop',
inlined from '__static_initialization_and_destruction_0.constprop' at C:\Users\matthew\Documents\Arduino\SenderUnoBinaryEncrypted\SenderUnoBinaryEncrypted.ino:7:5,
inlined from 'global constructors keyed to 65535_0_SenderUnoBinaryEncrypted.ino.cpp.o' at C:\Users\matthew\Documents\Arduino\SenderUnoBinaryEncrypted\SenderUnoBinaryEncrypted.ino:135:1:
C:\Users\matthew\Documents\Arduino\libraries\ArduinoDES-master\DES.cpp:177:9: warning: '__builtin_strcpy' writing 25 bytes into a region of size 24 overflows the destination [-Wstringop-overflow=]
sprintf((char *)key,"000000000000000000000000\0");
^

Hi,

Thank you for your helpful library.
It has been useful for me, and hope that you will always continue to support this open source community.

By using this current, library, I've managed to encrypt and decrypt the 3DES and get the same result as I expected with using 8 byte.

For now, we would like to decrypt 32 byte of data, and is this possible?

And if yes, how can we do it.

Thank you and looking forward for your reply.

-Amin

Is there anyway to calculate kcv using this library?

I ran the example code inside the folder. It worked well, but only able to encrypt natural number from 0 to 255, any number bigger will result incorrect, and most of all, I cant encrypt String type.
I tried to change data type of input, output array to String and else, but none is work.
Anyone still here to help?

hello octoate.

i am converting your library to a more sofisticated stacture, implementing the IV and KEY in the class and coding some improvements. I will do that for the reaspberry as well.

The main limitation of the advanced library so far is, trying to encrypt more than 160 bytes of input data (not including the padding) the programm crush. Probably from memory fragmentation as there are many memory blocks needed in order to declare, pad and encrypt the given plaintext string (byte [] = "test..........."). do you think 160 bytes of input data as suficient for the arduino? if yes, i will finish the library (only the padding validation check while decrypting is left to inmplement), and i will make the code compatible with raspberry Pi as well. Moreover i will make a new pull request for you to see the changes and if you want commit them in your respository as well.

Thanks spaniakos

Hey there,

I am using the following line:
des.encrypt(writeData, encryptData, encryptionKey);
writeData is a 16 byte uint8_t array, so is encryptData. I've varied encryptionKey between 8 and 16 entry byte arrays, but the result in writeData is always the first 8 bytes changed (encrypted, presumably), but the later 8 are still the initial value. Since the code for this library is way above my level, I was hoping you could help me with this.

Cheers