lokinet/crypto/chacha20/stream_chacha20.c
2018-10-23 07:29:37 -04:00

132 lines
3.3 KiB
C

#include <sodium/crypto_stream_chacha20.h>
#include <sodium/private/common.h>
#include <sodium/private/implementations.h>
#include <sodium/randombytes.h>
#include <sodium/runtime.h>
#include "stream_chacha20.h"
#include "ref/chacha20_ref.h"
#include "dolbeau/chacha20_dolbeau-avx2.h"
#include "dolbeau/chacha20_dolbeau-ssse3.h"
static const crypto_stream_chacha20_implementation *implementation =
&crypto_stream_chacha20_ref_implementation;
size_t
crypto_stream_chacha20_keybytes(void)
{
return crypto_stream_chacha20_KEYBYTES;
}
size_t
crypto_stream_chacha20_noncebytes(void)
{
return crypto_stream_chacha20_NONCEBYTES;
}
size_t
crypto_stream_chacha20_messagebytes_max(void)
{
return crypto_stream_chacha20_MESSAGEBYTES_MAX;
}
size_t
crypto_stream_chacha20_ietf_keybytes(void)
{
return crypto_stream_chacha20_ietf_KEYBYTES;
}
size_t
crypto_stream_chacha20_ietf_noncebytes(void)
{
return crypto_stream_chacha20_ietf_NONCEBYTES;
}
size_t
crypto_stream_chacha20_ietf_messagebytes_max(void)
{
return crypto_stream_chacha20_ietf_MESSAGEBYTES_MAX;
}
int
crypto_stream_chacha20(unsigned char *c, unsigned long long clen,
const unsigned char *n, const unsigned char *k)
{
return implementation->stream(c, clen, n, k);
}
int
crypto_stream_chacha20_ietf(unsigned char *c, unsigned long long clen,
const unsigned char *n, const unsigned char *k)
{
return implementation->stream_ietf(c, clen, n, k);
}
int
crypto_stream_chacha20_xor_ic(unsigned char *c, const unsigned char *m,
unsigned long long mlen, const unsigned char *n,
uint64_t ic, const unsigned char *k)
{
return implementation->stream_xor_ic(c, m, mlen, n, ic, k);
}
int
crypto_stream_chacha20_ietf_xor_ic(unsigned char *c, const unsigned char *m,
unsigned long long mlen,
const unsigned char *n, uint32_t ic,
const unsigned char *k)
{
return implementation->stream_ietf_xor_ic(c, m, mlen, n, ic, k);
}
int
crypto_stream_chacha20_xor(unsigned char *c, const unsigned char *m,
unsigned long long mlen, const unsigned char *n,
const unsigned char *k)
{
return implementation->stream_xor_ic(c, m, mlen, n, 0U, k);
}
int
crypto_stream_chacha20_ietf_xor(unsigned char *c, const unsigned char *m,
unsigned long long mlen, const unsigned char *n,
const unsigned char *k)
{
return implementation->stream_ietf_xor_ic(c, m, mlen, n, 0U, k);
}
void
crypto_stream_chacha20_ietf_keygen(
unsigned char k[crypto_stream_chacha20_ietf_KEYBYTES])
{
randombytes_buf(k, crypto_stream_chacha20_ietf_KEYBYTES);
}
void
crypto_stream_chacha20_keygen(unsigned char k[crypto_stream_chacha20_KEYBYTES])
{
randombytes_buf(k, crypto_stream_chacha20_KEYBYTES);
}
int
_crypto_stream_chacha20_pick_best_implementation(void)
{
implementation = &crypto_stream_chacha20_ref_implementation;
#if __AVX2__
if(sodium_runtime_has_avx2())
{
implementation = &crypto_stream_chacha20_dolbeau_avx2_implementation;
return 0;
}
#endif
#if __SSSE3__
if(sodium_runtime_has_ssse3())
{
implementation = &crypto_stream_chacha20_dolbeau_ssse3_implementation;
}
#endif
return 0;
}