libssh 0.11.1 The SSH library

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libmbedcrypto.h
1/*
2 * This file is part of the SSH Library
3 *
4 * Copyright (c) 2017 Sartura d.o.o.
5 *
6 * Author: Juraj Vijtiuk <juraj.vijtiuk@sartura.hr>
7 *
8 * The SSH Library is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU Lesser General Public License as published by
10 * the Free Software Foundation; either version 2.1 of the License, or (at your
11 * option) any later version.
12 *
13 * The SSH Library is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 * License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public License
19 * along with the SSH Library; see the file COPYING. If not, write to
20 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
21 * MA 02111-1307, USA.
22 */
23
24#ifndef LIBMBEDCRYPTO_H_
25#define LIBMBEDCRYPTO_H_
26
27#include "config.h"
28
29#ifdef HAVE_LIBMBEDCRYPTO
30
31#include <mbedtls/md.h>
32#include <mbedtls/bignum.h>
33#include <mbedtls/pk.h>
34#include <mbedtls/cipher.h>
35#include <mbedtls/entropy.h>
36#include <mbedtls/ctr_drbg.h>
37#include <mbedtls/platform.h>
38
39 typedef mbedtls_md_context_t *SHACTX;
40 typedef mbedtls_md_context_t *SHA256CTX;
41 typedef mbedtls_md_context_t *SHA384CTX;
42 typedef mbedtls_md_context_t *SHA512CTX;
43 typedef mbedtls_md_context_t *MD5CTX;
44 typedef mbedtls_md_context_t *HMACCTX;
45
46#define SHA_DIGEST_LENGTH 20
47#define SHA_DIGEST_LEN SHA_DIGEST_LENGTH
48#define MD5_DIGEST_LEN 16
49#define SHA256_DIGEST_LENGTH 32
50#define SHA256_DIGEST_LEN SHA256_DIGEST_LENGTH
51#define SHA384_DIGEST_LENGTH 48
52#define SHA384_DIGEST_LEN SHA384_DIGEST_LENGTH
53#define SHA512_DIGEST_LENGTH 64
54#define SHA512_DIGEST_LEN SHA512_DIGEST_LENGTH
55
56#ifndef EVP_MAX_MD_SIZE
57#define EVP_MAX_MD_SIZE 64
58#endif
59
60#define EVP_DIGEST_LEN EVP_MAX_MD_SIZE
61
62#define ssh_crypto_free(x) mbedtls_free(x)
63
64 typedef mbedtls_mpi *bignum;
65 typedef const mbedtls_mpi *const_bignum;
66 typedef void* bignum_CTX;
67
68/* Constants for curves */
69#define NID_mbedtls_nistp256 0
70#define NID_mbedtls_nistp384 1
71#define NID_mbedtls_nistp521 2
72
73 struct mbedtls_ecdsa_sig {
74 bignum r;
75 bignum s;
76};
77
78#ifdef __cplusplus
79 extern "C" {
80#endif
81
82bignum ssh_mbedcry_bn_new(void);
83 void ssh_mbedcry_bn_free(bignum num);
84 char *ssh_mbedcry_bn2num(const_bignum num, int radix);
85 int ssh_mbedcry_rand(bignum rnd, int bits, int top, int bottom);
86 int ssh_mbedcry_is_bit_set(bignum num, size_t pos);
87 int ssh_mbedcry_rand_range(bignum dest, bignum max);
88 int ssh_mbedcry_hex2bn(bignum *dest, char *data);
89
90#define bignum_new() ssh_mbedcry_bn_new()
91#define bignum_safe_free(num) do { \
92 if ((num) != NULL) { \
93 ssh_mbedcry_bn_free(num); \
94 (num)=NULL; \
95 } \
96 } while(0)
97#define bignum_ctx_new() NULL
98#define bignum_ctx_free(num) do {(num) = NULL;} while(0)
99#define bignum_ctx_invalid(ctx) (ctx == NULL?0:1)
100#define bignum_set_word(bn, n) (mbedtls_mpi_lset(bn, n)==0?1:0) /* TODO fix
101 overflow/underflow */
102#define bignum_bin2bn(data, datalen, bn) do { \
103 *(bn) = bignum_new(); \
104 if (*(bn) != NULL) { \
105 mbedtls_mpi_read_binary(*(bn), data, datalen); \
106 } \
107 } while(0)
108#define bignum_bn2dec(num) ssh_mbedcry_bn2num(num, 10)
109#define bignum_dec2bn(data, bn) mbedtls_mpi_read_string(bn, 10, data)
110#define bignum_bn2hex(num, dest) (*dest)=(unsigned char *)ssh_mbedcry_bn2num(num, 16)
111#define bignum_hex2bn(data, dest) ssh_mbedcry_hex2bn(dest, data)
112#define bignum_rand(rnd, bits) ssh_mbedcry_rand((rnd), (bits), 0, 1)
113#define bignum_rand_range(rnd, max) ssh_mbedcry_rand_range(rnd, max)
114#define bignum_mod_exp(dest, generator, exp, modulo, ctx) \
115 (mbedtls_mpi_exp_mod(dest, generator, exp, modulo, NULL)==0?1:0)
116#define bignum_add(dest, a, b) mbedtls_mpi_add_mpi(dest, a, b)
117#define bignum_sub(dest, a, b) mbedtls_mpi_sub_mpi(dest, a, b)
118#define bignum_mod(dest, a, b, ctx) \
119 (mbedtls_mpi_mod_mpi(dest, a, b) == 0 ? 1 : 0)
120#define bignum_num_bytes(num) mbedtls_mpi_size(num)
121#define bignum_num_bits(num) mbedtls_mpi_bitlen(num)
122#define bignum_is_bit_set(num, bit) ssh_mbedcry_is_bit_set(num, bit)
123#define bignum_bn2bin(num, len, ptr) mbedtls_mpi_write_binary(num, ptr, \
124 mbedtls_mpi_size(num))
125#define bignum_cmp(num1, num2) mbedtls_mpi_cmp_mpi(num1, num2)
126#define bignum_rshift1(dest, src) mbedtls_mpi_copy(dest, src), mbedtls_mpi_shift_r(dest, 1)
127#define bignum_dup(orig, dest) do { \
128 if (*(dest) == NULL) { \
129 *(dest) = bignum_new(); \
130 } \
131 if (*(dest) != NULL) { \
132 mbedtls_mpi_copy(*(dest), orig); \
133 } \
134 } while(0)
135
136mbedtls_ctr_drbg_context *ssh_get_mbedtls_ctr_drbg_context(void);
137
138 int ssh_mbedtls_random(void *where, int len, int strong);
139
140ssh_string make_ecpoint_string(const mbedtls_ecp_group *g, const
141 mbedtls_ecp_point *p);
142
143#define ssh_fips_mode() false
144
145#ifdef __cplusplus
146}
147#endif
148
149#endif /* HAVE_LIBMBEDCRYPTO */
150#endif /* LIBMBEDCRYPTO_H_ */