diff options
Diffstat (limited to 'src/plugins/wireguard/wireguard_chachapoly.c')
| -rw-r--r-- | src/plugins/wireguard/wireguard_chachapoly.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/plugins/wireguard/wireguard_chachapoly.c b/src/plugins/wireguard/wireguard_chachapoly.c index 961b43f100d..0dd7908d2e2 100644 --- a/src/plugins/wireguard/wireguard_chachapoly.c +++ b/src/plugins/wireguard/wireguard_chachapoly.c @@ -61,6 +61,36 @@ wg_chacha20poly1305_calc (vlib_main_t *vm, u8 *src, u32 src_len, u8 *dst, return (op->status == VNET_CRYPTO_OP_STATUS_COMPLETED); } +void +wg_xchacha20poly1305_encrypt (vlib_main_t *vm, u8 *src, u32 src_len, u8 *dst, + u8 *aad, u32 aad_len, + u8 nonce[XCHACHA20POLY1305_NONCE_SIZE], + u8 key[CHACHA20POLY1305_KEY_SIZE]) +{ + int i; + u32 derived_key[CHACHA20POLY1305_KEY_SIZE / sizeof (u32)]; + u64 h_nonce; + + clib_memcpy (&h_nonce, nonce + 16, sizeof (h_nonce)); + h_nonce = le64toh (h_nonce); + hchacha20 (derived_key, nonce, key); + + for (i = 0; i < (sizeof (derived_key) / sizeof (derived_key[0])); i++) + (derived_key[i]) = htole32 ((derived_key[i])); + + uint32_t key_idx; + + key_idx = + vnet_crypto_key_add (vm, VNET_CRYPTO_ALG_CHACHA20_POLY1305, + (uint8_t *) derived_key, CHACHA20POLY1305_KEY_SIZE); + + wg_chacha20poly1305_calc (vm, src, src_len, dst, aad, aad_len, h_nonce, + VNET_CRYPTO_OP_CHACHA20_POLY1305_ENC, key_idx); + + vnet_crypto_key_del (vm, key_idx); + wg_secure_zero_memory (derived_key, CHACHA20POLY1305_KEY_SIZE); +} + bool wg_xchacha20poly1305_decrypt (vlib_main_t *vm, u8 *src, u32 src_len, u8 *dst, u8 *aad, u32 aad_len, |