Workaround for some CMS signature formats.
[openssl.git] / fips / dh / fips_dhvs.c
1 /* fips/dh/fips_dhvs.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3  * project.
4  */
5 /* ====================================================================
6  * Copyright (c) 2011 The OpenSSL Project.  All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer. 
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in
17  *    the documentation and/or other materials provided with the
18  *    distribution.
19  *
20  * 3. All advertising materials mentioning features or use of this
21  *    software must display the following acknowledgment:
22  *    "This product includes software developed by the OpenSSL Project
23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24  *
25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26  *    endorse or promote products derived from this software without
27  *    prior written permission. For written permission, please contact
28  *    licensing@OpenSSL.org.
29  *
30  * 5. Products derived from this software may not be called "OpenSSL"
31  *    nor may "OpenSSL" appear in their names without prior written
32  *    permission of the OpenSSL Project.
33  *
34  * 6. Redistributions of any form whatsoever must retain the following
35  *    acknowledgment:
36  *    "This product includes software developed by the OpenSSL Project
37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38  *
39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50  * OF THE POSSIBILITY OF SUCH DAMAGE.
51  * ====================================================================
52  */
53
54
55 #define OPENSSL_FIPSAPI
56 #include <openssl/opensslconf.h>
57
58 #ifndef OPENSSL_FIPS
59 #include <stdio.h>
60
61 int main(int argc, char **argv)
62 {
63     printf("No FIPS DH support\n");
64     return(0);
65 }
66 #else
67
68 #include <openssl/crypto.h>
69 #include <openssl/bn.h>
70 #include <openssl/dh.h>
71 #include <openssl/fips.h>
72 #include <openssl/err.h>
73 #include <openssl/evp.h>
74 #include <string.h>
75 #include <ctype.h>
76
77 #include "fips_utl.h"
78
79 static const EVP_MD *parse_md(char *line)
80         {
81         char *p;
82         if (line[0] != '[' || line[1] != 'F')
83                 return NULL;
84         p = strchr(line, '-');
85         if (!p)
86                 return NULL;
87         line = p + 1;
88         p = strchr(line, ']');
89         if (!p)
90                 return NULL;
91         *p = 0;
92         p = line;
93         while(isspace(*p))
94                 p++;
95         if (!strcmp(p, "SHA1"))
96                 return EVP_sha1();
97         else if (!strcmp(p, "SHA224"))
98                 return EVP_sha224();
99         else if (!strcmp(p, "SHA256"))
100                 return EVP_sha256();
101         else if (!strcmp(p, "SHA384"))
102                 return EVP_sha384();
103         else if (!strcmp(p, "SHA512"))
104                 return EVP_sha512();
105         else
106                 return NULL;
107         }
108
109 static void output_Zhash(FILE *out, int exout,
110                                 DH *dh, BIGNUM *peerkey, const EVP_MD *md,
111                                 unsigned char *rhash, size_t rhashlen)
112         {
113         unsigned char *Z;
114         unsigned char chash[EVP_MAX_MD_SIZE];
115         int Zlen;
116         if (rhash == NULL)
117                 {
118                 rhashlen = M_EVP_MD_size(md);
119                 if (!DH_generate_key(dh))
120                         exit (1);
121                 do_bn_print_name(out, "YephemIUT", dh->pub_key);
122                 if (exout)
123                         do_bn_print_name(out, "XephemIUT", dh->priv_key);
124                 }
125         Z = OPENSSL_malloc(BN_num_bytes(dh->p));
126         if (!Z)
127                 exit(1);
128         Zlen = DH_compute_key_padded(Z, peerkey, dh);
129         if (exout)
130                 OutputValue("Z", Z, Zlen, out, 0);
131         FIPS_digest(Z, Zlen, chash, NULL, md);
132         OutputValue(rhash ? "IUTHashZZ" : "HashZZ", chash, rhashlen, out, 0);
133         if (rhash)
134                 {
135                 fprintf(out, "Result = %s\n",
136                                 memcmp(chash, rhash, rhashlen) ? "F" : "P");
137                 }
138         else
139                 {
140                 BN_clear_free(dh->priv_key);
141                 BN_clear_free(dh->pub_key);
142                 dh->priv_key = NULL;
143                 dh->pub_key = NULL;
144                 }
145         OPENSSL_cleanse(Z, Zlen);
146         OPENSSL_free(Z);
147         }
148
149 #ifdef FIPS_ALGVS
150 int fips_dhvs_main(int argc, char **argv)
151 #else
152 int main(int argc, char **argv)
153 #endif
154         {
155         char **args = argv + 1;
156         int argn = argc - 1;
157         FILE *in, *out;
158         char buf[2048], lbuf[2048];
159         unsigned char *rhash;
160         long rhashlen;
161         DH *dh = NULL;
162         const EVP_MD *md = NULL;
163         BIGNUM *peerkey = NULL;
164         char *keyword = NULL, *value = NULL;
165         int do_verify = -1, exout = 0;
166
167         fips_algtest_init();
168
169         if (argn && !strcmp(*args, "dhver"))
170                 {
171                 do_verify = 1;
172                 args++;
173                 argn--;
174                 }
175         else if (argn && !strcmp(*args, "dhgen"))
176                 {
177                 do_verify = 0;
178                 args++;
179                 argn--;
180                 }
181
182         if (argn && !strcmp(*args, "-exout"))
183                 {
184                 exout = 1;
185                 args++;
186                 argn--;
187                 }
188
189         if (do_verify == -1)
190                 {
191                 fprintf(stderr,"%s [dhver|dhgen|] [-exout] (infile outfile)\n",argv[0]);
192                 exit(1);
193                 }
194
195         if (argn == 2)
196                 {
197                 in = fopen(*args, "r");
198                 if (!in)
199                         {
200                         fprintf(stderr, "Error opening input file\n");
201                         exit(1);
202                         }
203                 out = fopen(args[1], "w");
204                 if (!out)
205                         {
206                         fprintf(stderr, "Error opening output file\n");
207                         exit(1);
208                         }
209                 }
210         else if (argn == 0)
211                 {
212                 in = stdin;
213                 out = stdout;
214                 }
215         else
216                 {
217                 fprintf(stderr,"%s [dhver|dhgen|] [-exout] (infile outfile)\n",argv[0]);
218                 exit(1);
219                 }
220
221         dh = FIPS_dh_new();
222
223         while (fgets(buf, sizeof(buf), in) != NULL)
224                 {
225                 fputs(buf, out);
226                 if (strlen(buf) > 6 && !strncmp(buf, "[F", 2))
227                         {
228                         md = parse_md(buf);
229                         if (md == NULL)
230                                 goto parse_error;
231                         if (dh)
232                                 FIPS_dh_free(dh);
233                         dh = FIPS_dh_new();
234                         continue;
235                         }
236                 if (!parse_line(&keyword, &value, lbuf, buf))
237                         continue;
238                 if (!strcmp(keyword, "P"))
239                         {
240                         if (!do_hex2bn(&dh->p, value))
241                                 goto parse_error;
242                         }
243                 else if (!strcmp(keyword, "Q"))
244                         {
245                         if (!do_hex2bn(&dh->q, value))
246                                 goto parse_error;
247                         }
248                 else if (!strcmp(keyword, "G"))
249                         {
250                         if (!do_hex2bn(&dh->g, value))
251                                 goto parse_error;
252                         }
253                 else if (!strcmp(keyword, "XephemIUT"))
254                         {
255                         if (!do_hex2bn(&dh->priv_key, value))
256                                 goto parse_error;
257                         }
258                 else if (!strcmp(keyword, "YephemIUT"))
259                         {
260                         if (!do_hex2bn(&dh->pub_key, value))
261                                 goto parse_error;
262                         }
263                 else if (!strcmp(keyword, "YephemCAVS"))
264                         {
265                         if (!do_hex2bn(&peerkey, value))
266                                 goto parse_error;
267                         if (do_verify == 0)
268                                 output_Zhash(out, exout, dh, peerkey, md,
269                                                         NULL, 0);
270                         }
271                 else if (!strcmp(keyword, "CAVSHashZZ"))
272                         {
273                         if (!md)
274                                 goto parse_error;
275                         rhash = hex2bin_m(value, &rhashlen);
276                         if (!rhash || rhashlen != M_EVP_MD_size(md))
277                                 goto parse_error;
278                         output_Zhash(out, exout, dh, peerkey, md,
279                                                         rhash, rhashlen);
280                         }
281                 }
282         if (in && in != stdin)
283                 fclose(in);
284         if (out && out != stdout)
285                 fclose(out);
286         return 0;
287         parse_error:
288         fprintf(stderr, "Error Parsing request file\n");
289         exit(1);
290         }
291
292 #endif