aead aes constructs added

[gonatienza]

Hey @reaperhulk,

Included low level bindings for newer APIs for AEAD AES-based constructs (crypto_aead_aegis* from 1.0.19), plus old crypto_aead_aes256gcm*.

size_t crypto_aead_aegis256_keybytes(void);
size_t crypto_aead_aegis256_nsecbytes(void);
size_t crypto_aead_aegis256_npubbytes(void);
size_t crypto_aead_aegis256_abytes(void);
size_t crypto_aead_aegis256_messagebytes_max(void);

size_t crypto_aead_aegis128l_keybytes(void);
size_t crypto_aead_aegis128l_nsecbytes(void);
size_t crypto_aead_aegis128l_npubbytes(void);
size_t crypto_aead_aegis128l_abytes(void);
size_t crypto_aead_aegis128l_messagebytes_max(void);

size_t crypto_aead_aes256gcm_keybytes(void);
size_t crypto_aead_aes256gcm_nsecbytes(void);
size_t crypto_aead_aes256gcm_npubbytes(void);
size_t crypto_aead_aes256gcm_abytes(void);
size_t crypto_aead_aes256gcm_messagebytes_max(void);

int crypto_aead_aegis256_encrypt(unsigned char *c,
                                 unsigned long long *clen_p,
                                 const unsigned char *m,
                                 unsigned long long mlen,
                                 const unsigned char *ad,
                                 unsigned long long adlen,
                                 const unsigned char *nsec,
                                 const unsigned char *npub,
                                 const unsigned char *k);

int crypto_aead_aegis256_decrypt(unsigned char *m,
                                 unsigned long long *mlen_p,
                                 unsigned char *nsec,
                                 const unsigned char *c,
                                 unsigned long long clen,
                                 const unsigned char *ad,
                                 unsigned long long adlen,
                                 const unsigned char *npub,
                                 const unsigned char *k);

int crypto_aead_aegis128l_encrypt(unsigned char *c,
                                  unsigned long long *clen_p,
                                  const unsigned char *m,
                                  unsigned long long mlen,
                                  const unsigned char *ad,
                                  unsigned long long adlen,
                                  const unsigned char *nsec,
                                  const unsigned char *npub,
                                  const unsigned char *k);

int crypto_aead_aegis128l_decrypt(unsigned char *m,
                                  unsigned long long *mlen_p,
                                  unsigned char *nsec,
                                  const unsigned char *c,
                                  unsigned long long clen,
                                  const unsigned char *ad,
                                  unsigned long long adlen,
                                  const unsigned char *npub,
                                  const unsigned char *k);

int crypto_aead_aes256gcm_is_available(void);

int crypto_aead_aes256gcm_encrypt(unsigned char *c,
                                  unsigned long long *clen_p,
                                  const unsigned char *m,
                                  unsigned long long mlen,
                                  const unsigned char *ad,
                                  unsigned long long adlen,
                                  const unsigned char *nsec,
                                  const unsigned char *npub,
                                  const unsigned char *k);

int crypto_aead_aes256gcm_decrypt(unsigned char *m,
                                  unsigned long long *mlen_p,
                                  unsigned char *nsec,
                                  const unsigned char *c,
                                  unsigned long long clen,
                                  const unsigned char *ad,
                                  unsigned long long adlen,
                                  const unsigned char *npub,
                                  const unsigned char *k);

With crypto_aead_aegis* (with AES-NI) I noticed a decent performance bump compared with related AES GCM based constructs from cryptography.

Would be a nice addition for the next release, keeping up to date with the latest libsodium versions.

[gonatienza]

Hi @reaperhulk, just making sure you got this one.

[reaperhulk]

Thanks for your patience here, life things have me operating with very limited bandwidth for open source right now!