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/* Copyright 2016-2018 INRIA and Microsoft Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "kremlib.h"
#ifndef __Hacl_Chacha20_H
#define __Hacl_Chacha20_H
typedef uint32_t Hacl_Impl_Xor_Lemmas_u32;
typedef uint8_t Hacl_Impl_Xor_Lemmas_u8;
typedef uint8_t *Hacl_Lib_LoadStore32_uint8_p;
typedef uint32_t Hacl_Impl_Chacha20_u32;
typedef uint32_t Hacl_Impl_Chacha20_h32;
typedef uint8_t *Hacl_Impl_Chacha20_uint8_p;
typedef uint32_t *Hacl_Impl_Chacha20_state;
typedef uint32_t Hacl_Impl_Chacha20_idx;
typedef struct
{
void *k;
void *n;
} Hacl_Impl_Chacha20_log_t_;
typedef void *Hacl_Impl_Chacha20_log_t;
typedef uint32_t Hacl_Lib_Create_h32;
typedef uint8_t *Hacl_Chacha20_uint8_p;
typedef uint32_t Hacl_Chacha20_uint32_t;
void Hacl_Chacha20_chacha20_key_block(uint8_t *block, uint8_t *k, uint8_t *n1, uint32_t ctr);
/*
This function implements Chacha20
val chacha20 :
output:uint8_p ->
plain:uint8_p{ disjoint output plain } ->
len:uint32_t{ v len = length output /\ v len = length plain } ->
key:uint8_p{ length key = 32 } ->
nonce:uint8_p{ length nonce = 12 } ->
ctr:uint32_t{ v ctr + length plain / 64 < pow2 32 } ->
Stack unit
(requires
fun h -> live h output /\ live h plain /\ live h nonce /\ live h key)
(ensures
fun h0 _ h1 ->
live h1 output /\ live h0 plain /\ modifies_1 output h0 h1 /\
live h0 nonce /\
live h0 key /\
h1.[ output ] ==
chacha20_encrypt_bytes h0.[ key ] h0.[ nonce ] (v ctr) h0.[ plain ])
*/
void
Hacl_Chacha20_chacha20(
uint8_t *output,
uint8_t *plain,
uint32_t len,
uint8_t *k,
uint8_t *n1,
uint32_t ctr);
#endif
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