AES Library or code for C++

Question

I'm supposed to overload the class below twice. Once I'm supposed to implement it with AES (Rijndael) and once with Twofish. However, I can't seem to find a simple implementation that allows to encrypt only a single block. The implementations I found come with included CBC and Padding. Any hint?

#ifndef CRYPTER_H
#define CRYPTER_H

#include <valarray>

class Crypter {
public:
    Crypter();
    virtual ~Crypter();

    //Encrypts a single block of 16 byte.
    virtual std::valarray<unsigned char> encrypt(std::valarray<unsigned char> plaintext,
            std::valarray<unsigned char> passphrase) = 0;

    //Decrypts a single block of 16 byte.
    virtual std::valarray<unsigned char> decrypt(std::valarray<unsigned char> cyphertext,
            std::valarray<unsigned char> passphrase) = 0;     
};
#endif  /* CRYPTER_H */

Have you checked OpenSSL and Crypto++? – John Tracid Sep 02 '15 at 11:39 — John Tracid, Sep 02 '15 at 11:39
openssl supports CTR mode, and so probably does crypto++ – Jens Sep 02 '15 at 11:42 — Jens, Sep 02 '15 at 11:42
Try also PolarSSL aka mbedTLS. There is AES implementation. – i486 Sep 02 '15 at 11:48 — i486, Sep 02 '15 at 11:48

score 1 · Accepted Answer · answered Sep 02 '15 at 11:46

1

Openssl is the best crypto library for C/C++ and I think it's definitely worth to give it a look.

You can always break data yourself into blocks and encrypt/decrypt with library functions.

answered Sep 02 '15 at 11:46

Catalin

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It is not the best library, but is widely used in Linux, etc. – i486 Sep 02 '15 at 11:48
@i486: In OSS cryptography, "widely used" is a strength in and of itself. However, OpenSSL doesn't have a Twofish implementation AFAIK...? – DevSolar Sep 02 '15 at 11:51
Found it :-) I can copy the source code from aes_x86core.c. However, there's no Twofish implementation. – Aptitude Sep 02 '15 at 12:22
@Aptitude: The idea is to *use* a library (and benefit from future releases), not copy its source code... – DevSolar Sep 02 '15 at 14:28

AES Library or code for C++

1 Answers1