mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-22 02:37:15 +00:00
67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
/* This file is in the public domain. */
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <crypto/chacha20/chacha.h>
|
|
#include <opencrypto/xform_enc.h>
|
|
|
|
static int
|
|
chacha20_xform_setkey(void *ctx, const uint8_t *key, int len)
|
|
{
|
|
|
|
if (len != CHACHA_MINKEYLEN && len != 32)
|
|
return (EINVAL);
|
|
|
|
chacha_keysetup(ctx, key, len * 8);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
chacha20_xform_reinit(void *ctx, const uint8_t *iv, size_t ivlen)
|
|
{
|
|
KASSERT(ivlen == CHACHA_NONCELEN + CHACHA_CTRLEN,
|
|
("%s: invalid IV length", __func__));
|
|
chacha_ivsetup(ctx, iv + 8, iv);
|
|
}
|
|
|
|
static void
|
|
chacha20_xform_crypt(void *ctx, const uint8_t *in, uint8_t *out)
|
|
{
|
|
|
|
chacha_encrypt_bytes(ctx, in, out, CHACHA_BLOCKLEN);
|
|
}
|
|
|
|
static void
|
|
chacha20_xform_crypt_multi(void *ctx, const uint8_t *in, uint8_t *out,
|
|
size_t len)
|
|
{
|
|
KASSERT(len % CHACHA_BLOCKLEN == 0, ("%s: invalid length", __func__));
|
|
chacha_encrypt_bytes(ctx, in, out, len);
|
|
}
|
|
|
|
static void
|
|
chacha20_xform_crypt_last(void *ctx, const uint8_t *in, uint8_t *out,
|
|
size_t len)
|
|
{
|
|
|
|
chacha_encrypt_bytes(ctx, in, out, len);
|
|
}
|
|
|
|
const struct enc_xform enc_xform_chacha20 = {
|
|
.type = CRYPTO_CHACHA20,
|
|
.name = "chacha20",
|
|
.ctxsize = sizeof(struct chacha_ctx),
|
|
.blocksize = 1,
|
|
.native_blocksize = CHACHA_BLOCKLEN,
|
|
.ivsize = CHACHA_NONCELEN + CHACHA_CTRLEN,
|
|
.minkey = CHACHA_MINKEYLEN,
|
|
.maxkey = 32,
|
|
.setkey = chacha20_xform_setkey,
|
|
.reinit = chacha20_xform_reinit,
|
|
.encrypt = chacha20_xform_crypt,
|
|
.decrypt = chacha20_xform_crypt,
|
|
.encrypt_multi = chacha20_xform_crypt_multi,
|
|
.decrypt_multi = chacha20_xform_crypt_multi,
|
|
.encrypt_last = chacha20_xform_crypt_last,
|
|
.decrypt_last = chacha20_xform_crypt_last,
|
|
};
|