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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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.
*/
#pragma once
#include <stdint.h>
#include <openssl/sha.h>
#include <openssl/md5.h>
#include "crypto/s2n_evp.h"
#define S2N_MAX_DIGEST_LEN SHA512_DIGEST_LENGTH
typedef enum {
S2N_HASH_NONE,
S2N_HASH_MD5,
S2N_HASH_SHA1,
S2N_HASH_SHA224,
S2N_HASH_SHA256,
S2N_HASH_SHA384,
S2N_HASH_SHA512,
S2N_HASH_MD5_SHA1,
/* Don't add any hash algorithms below S2N_HASH_ALGS_COUNT */
S2N_HASH_ALGS_COUNT
} s2n_hash_algorithm;
struct s2n_hash_state {
s2n_hash_algorithm alg;
int currently_in_hash_block;
};
/* SHA1
* These fields were determined from the SHA specification, augmented by
* analyzing SHA implementations.
* PER_BLOCK_COST is the cost of a compression round. Pessimistically assume
* it is 1000 cycles/block, which is worse than real implementations (larger
* numbers here make lucky13 leakages look worse), and hence large is safer.
* PER_BYTE_COST is the cost of memcopy one byte that is already in cache,
* to a location already in cache.
*/
enum {
PER_BLOCK_COST = 1000,
PER_BYTE_COST = 1,
BLOCK_SIZE = 64,
LENGTH_FIELD_SIZE = 8,
DIGEST_SIZE = 20
};
#define MAX_SIZE 1024
enum {
SUCCESS = 0,
FAILURE = -1
};
int s2n_hash_digest_size(s2n_hash_algorithm alg, uint8_t *out);
int s2n_hash_new(struct s2n_hash_state *state);
S2N_RESULT s2n_hash_state_validate(struct s2n_hash_state *state);
int s2n_hash_init(struct s2n_hash_state *state, s2n_hash_algorithm alg);
int s2n_hash_update(struct s2n_hash_state *state, const void *data, uint32_t size);
int s2n_hash_digest(struct s2n_hash_state *state, void *out, uint32_t size);
int s2n_hash_copy(struct s2n_hash_state *to, struct s2n_hash_state *from);
int s2n_hash_reset(struct s2n_hash_state *state);
int s2n_hash_free(struct s2n_hash_state *state);
int s2n_hash_get_currently_in_hash_total(struct s2n_hash_state *state, uint64_t *out);
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