libssh  0.8.4
The SSH library
libgcrypt.h
1 /*
2  * This file is part of the SSH Library
3  *
4  * Copyright (c) 2009 by Aris Adamantiadis
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef LIBGCRYPT_H_
22 #define LIBGCRYPT_H_
23 
24 #include "config.h"
25 
26 #ifdef HAVE_LIBGCRYPT
27 
28 #include <gcrypt.h>
29 typedef gcry_md_hd_t SHACTX;
30 typedef gcry_md_hd_t SHA256CTX;
31 typedef gcry_md_hd_t SHA384CTX;
32 typedef gcry_md_hd_t SHA512CTX;
33 typedef gcry_md_hd_t MD5CTX;
34 typedef gcry_md_hd_t HMACCTX;
35 typedef gcry_md_hd_t EVPCTX;
36 #define SHA_DIGEST_LENGTH 20
37 #define SHA_DIGEST_LEN SHA_DIGEST_LENGTH
38 #define MD5_DIGEST_LEN 16
39 #define SHA256_DIGEST_LENGTH 32
40 #define SHA256_DIGEST_LEN SHA256_DIGEST_LENGTH
41 #define SHA384_DIGEST_LENGTH 48
42 #define SHA384_DIGEST_LEN SHA384_DIGEST_LENGTH
43 #define SHA512_DIGEST_LENGTH 64
44 #define SHA512_DIGEST_LEN SHA512_DIGEST_LENGTH
45 
46 #ifndef EVP_MAX_MD_SIZE
47 #define EVP_MAX_MD_SIZE 64
48 #endif
49 
50 #define EVP_DIGEST_LEN EVP_MAX_MD_SIZE
51 
52 typedef gcry_mpi_t bignum;
53 
54 /* Constants for curves. */
55 #define NID_gcrypt_nistp256 0
56 #define NID_gcrypt_nistp384 1
57 #define NID_gcrypt_nistp521 2
58 
59 /* missing gcrypt functions */
60 int ssh_gcry_dec2bn(bignum *bn, const char *data);
61 char *ssh_gcry_bn2dec(bignum bn);
62 
63 #define bignum_new() gcry_mpi_new(0)
64 #define bignum_safe_free(num) do { \
65  if ((num) != NULL) { \
66  gcry_mpi_release((num)); \
67  (num)=NULL; \
68  } \
69  } while (0)
70 #define bignum_set_word(bn,n) gcry_mpi_set_ui(bn,n)
71 #define bignum_bin2bn(bn,datalen,data) gcry_mpi_scan(data,GCRYMPI_FMT_USG,bn,datalen,NULL)
72 #define bignum_bn2dec(num) ssh_gcry_bn2dec(num)
73 #define bignum_dec2bn(num, data) ssh_gcry_dec2bn(data, num)
74 #define bignum_bn2hex(num,data) gcry_mpi_aprint(GCRYMPI_FMT_HEX,data,NULL,num)
75 #define bignum_hex2bn(num,datalen,data) gcry_mpi_scan(num,GCRYMPI_FMT_HEX,data,datalen,NULL)
76 #define bignum_rand(num,bits) gcry_mpi_randomize(num,bits,GCRY_STRONG_RANDOM),gcry_mpi_set_bit(num,bits-1),gcry_mpi_set_bit(num,0)
77 #define bignum_mod_exp(dest,generator,exp,modulo) gcry_mpi_powm(dest,generator,exp,modulo)
78 #define bignum_num_bits(num) gcry_mpi_get_nbits(num)
79 #define bignum_num_bytes(num) ((gcry_mpi_get_nbits(num)+7)/8)
80 #define bignum_is_bit_set(num,bit) gcry_mpi_test_bit(num,bit)
81 #define bignum_bn2bin(num,datalen,data) gcry_mpi_print(GCRYMPI_FMT_USG,data,datalen,NULL,num)
82 #define bignum_cmp(num1,num2) gcry_mpi_cmp(num1,num2)
83 
84 /* Helper functions for data conversions. */
85 
86 /* Extract an MPI from the given s-expression SEXP named NAME which is
87  encoded using INFORMAT and store it in a newly allocated ssh_string
88  encoded using OUTFORMAT. */
89 ssh_string ssh_sexp_extract_mpi(const gcry_sexp_t sexp,
90  const char *name,
91  enum gcry_mpi_format informat,
92  enum gcry_mpi_format outformat);
93 
94 #endif /* HAVE_LIBGCRYPT */
95 
96 #endif /* LIBGCRYPT_H_ */
Definition: string.h:29