libssh  0.10.6
The SSH library
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 
38 typedef mbedtls_md_context_t *SHACTX;
39 typedef mbedtls_md_context_t *SHA256CTX;
40 typedef mbedtls_md_context_t *SHA384CTX;
41 typedef mbedtls_md_context_t *SHA512CTX;
42 typedef mbedtls_md_context_t *MD5CTX;
43 typedef mbedtls_md_context_t *HMACCTX;
44 
45 #define SHA_DIGEST_LENGTH 20
46 #define SHA_DIGEST_LEN SHA_DIGEST_LENGTH
47 #define MD5_DIGEST_LEN 16
48 #define SHA256_DIGEST_LENGTH 32
49 #define SHA256_DIGEST_LEN SHA256_DIGEST_LENGTH
50 #define SHA384_DIGEST_LENGTH 48
51 #define SHA384_DIGEST_LEN SHA384_DIGEST_LENGTH
52 #define SHA512_DIGEST_LENGTH 64
53 #define SHA512_DIGEST_LEN SHA512_DIGEST_LENGTH
54 
55 #ifndef EVP_MAX_MD_SIZE
56 #define EVP_MAX_MD_SIZE 64
57 #endif
58 
59 #define EVP_DIGEST_LEN EVP_MAX_MD_SIZE
60 
61 typedef mbedtls_mpi *bignum;
62 typedef const mbedtls_mpi *const_bignum;
63 typedef void* bignum_CTX;
64 
65 /* Constants for curves */
66 #define NID_mbedtls_nistp256 0
67 #define NID_mbedtls_nistp384 1
68 #define NID_mbedtls_nistp521 2
69 
70 struct mbedtls_ecdsa_sig {
71  bignum r;
72  bignum s;
73 };
74 
75 #ifdef __cplusplus
76 extern "C" {
77 #endif
78 
79 bignum ssh_mbedcry_bn_new(void);
80 void ssh_mbedcry_bn_free(bignum num);
81 unsigned char *ssh_mbedcry_bn2num(const_bignum num, int radix);
82 int ssh_mbedcry_rand(bignum rnd, int bits, int top, int bottom);
83 int ssh_mbedcry_is_bit_set(bignum num, size_t pos);
84 int ssh_mbedcry_rand_range(bignum dest, bignum max);
85 int ssh_mbedcry_hex2bn(bignum *dest, char *data);
86 
87 #define bignum_new() ssh_mbedcry_bn_new()
88 #define bignum_safe_free(num) do { \
89  if ((num) != NULL) { \
90  ssh_mbedcry_bn_free(num); \
91  (num)=NULL; \
92  } \
93  } while(0)
94 #define bignum_ctx_new() NULL
95 #define bignum_ctx_free(num) do {(num) = NULL;} while(0)
96 #define bignum_ctx_invalid(ctx) (ctx == NULL?0:1)
97 #define bignum_set_word(bn, n) (mbedtls_mpi_lset(bn, n)==0?1:0) /* TODO fix
98  overflow/underflow */
99 #define bignum_bin2bn(data, datalen, bn) do { \
100  *(bn) = bignum_new(); \
101  if (*(bn) != NULL) { \
102  mbedtls_mpi_read_binary(*(bn), data, datalen); \
103  } \
104  } while(0)
105 #define bignum_bn2dec(num) ssh_mbedcry_bn2num(num, 10)
106 #define bignum_dec2bn(data, bn) mbedtls_mpi_read_string(bn, 10, data)
107 #define bignum_bn2hex(num, dest) (*dest)=ssh_mbedcry_bn2num(num, 16)
108 #define bignum_hex2bn(data, dest) ssh_mbedcry_hex2bn(dest, data)
109 #define bignum_rand(rnd, bits) ssh_mbedcry_rand((rnd), (bits), 0, 1)
110 #define bignum_rand_range(rnd, max) ssh_mbedcry_rand_range(rnd, max)
111 #define bignum_mod_exp(dest, generator, exp, modulo, ctx) \
112  (mbedtls_mpi_exp_mod(dest, generator, exp, modulo, NULL)==0?1:0)
113 #define bignum_add(dest, a, b) mbedtls_mpi_add_mpi(dest, a, b)
114 #define bignum_sub(dest, a, b) mbedtls_mpi_sub_mpi(dest, a, b)
115 #define bignum_mod(dest, a, b, ctx) \
116  (mbedtls_mpi_mod_mpi(dest, a, b) == 0 ? 1 : 0)
117 #define bignum_num_bytes(num) mbedtls_mpi_size(num)
118 #define bignum_num_bits(num) mbedtls_mpi_bitlen(num)
119 #define bignum_is_bit_set(num, bit) ssh_mbedcry_is_bit_set(num, bit)
120 #define bignum_bn2bin(num, len, ptr) mbedtls_mpi_write_binary(num, ptr, \
121  mbedtls_mpi_size(num))
122 #define bignum_cmp(num1, num2) mbedtls_mpi_cmp_mpi(num1, num2)
123 #define bignum_rshift1(dest, src) mbedtls_mpi_copy(dest, src), mbedtls_mpi_shift_r(dest, 1)
124 #define bignum_dup(orig, dest) do { \
125  if (*(dest) == NULL) { \
126  *(dest) = bignum_new(); \
127  } \
128  if (*(dest) != NULL) { \
129  mbedtls_mpi_copy(orig, *(dest)); \
130  } \
131  } while(0)
132 
133 mbedtls_ctr_drbg_context *ssh_get_mbedtls_ctr_drbg_context(void);
134 
135 int ssh_mbedtls_random(void *where, int len, int strong);
136 
137 ssh_string make_ecpoint_string(const mbedtls_ecp_group *g, const
138  mbedtls_ecp_point *p);
139 
140 #define ssh_fips_mode() false
141 
142 #ifdef __cplusplus
143 }
144 #endif
145 
146 #endif /* HAVE_LIBMBEDCRYPTO */
147 #endif /* LIBMBEDCRYPTO_H_ */
ssh_string_struct
Definition: string.h:33