1 /*
2 * Copyright 2018-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <string.h>
11
12 #include "apps.h"
13 #include "progs.h"
14 #include <openssl/bio.h>
15 #include <openssl/err.h>
16 #include <openssl/evp.h>
17 #include <openssl/params.h>
18 #include <openssl/core_names.h>
19
20 #undef BUFSIZE
21 #define BUFSIZE 1024 * 8
22
23 typedef enum OPTION_choice {
24 OPT_COMMON,
25 OPT_MACOPT,
26 OPT_BIN,
27 OPT_IN,
28 OPT_OUT,
29 OPT_CIPHER,
30 OPT_DIGEST,
31 OPT_PROV_ENUM
32 } OPTION_CHOICE;
33
34 const OPTIONS mac_options[] = {
35 { OPT_HELP_STR, 1, '-', "Usage: %s [options] mac_name\n" },
36
37 OPT_SECTION("General"),
38 { "help", OPT_HELP, '-', "Display this summary" },
39 { "macopt", OPT_MACOPT, 's', "MAC algorithm parameters in n:v form" },
40 { "cipher", OPT_CIPHER, 's', "Cipher" },
41 { "digest", OPT_DIGEST, 's', "Digest" },
42 { OPT_MORE_STR, 1, '-', "See 'PARAMETER NAMES' in the EVP_MAC_ docs" },
43
44 OPT_SECTION("Input"),
45 { "in", OPT_IN, '<', "Input file to MAC (default is stdin)" },
46
47 OPT_SECTION("Output"),
48 { "out", OPT_OUT, '>', "Output to filename rather than stdout" },
49 { "binary", OPT_BIN, '-',
50 "Output in binary format (default is hexadecimal)" },
51
52 OPT_PROV_OPTIONS,
53
54 OPT_PARAMETERS(),
55 { "mac_name", 0, 0, "MAC algorithm" },
56 { NULL }
57 };
58
alloc_mac_algorithm_name(STACK_OF (OPENSSL_STRING)** optp,const char * name,const char * arg)59 static char *alloc_mac_algorithm_name(STACK_OF(OPENSSL_STRING) **optp,
60 const char *name, const char *arg)
61 {
62 size_t len = strlen(name) + strlen(arg) + 2;
63 char *res;
64
65 if (*optp == NULL)
66 *optp = sk_OPENSSL_STRING_new_null();
67 if (*optp == NULL)
68 return NULL;
69
70 res = app_malloc(len, "algorithm name");
71 BIO_snprintf(res, len, "%s:%s", name, arg);
72 if (sk_OPENSSL_STRING_push(*optp, res))
73 return res;
74 OPENSSL_free(res);
75 return NULL;
76 }
77
mac_main(int argc,char ** argv)78 int mac_main(int argc, char **argv)
79 {
80 int ret = 1;
81 char *prog;
82 EVP_MAC *mac = NULL;
83 OPTION_CHOICE o;
84 EVP_MAC_CTX *ctx = NULL;
85 STACK_OF(OPENSSL_STRING) *opts = NULL;
86 unsigned char *buf = NULL;
87 size_t len;
88 int i;
89 BIO *in = NULL, *out = NULL;
90 const char *outfile = NULL;
91 const char *infile = NULL;
92 int out_bin = 0;
93 int inform = FORMAT_BINARY;
94 char *digest = NULL, *cipher = NULL;
95 OSSL_PARAM *params = NULL;
96
97 prog = opt_init(argc, argv, mac_options);
98 buf = app_malloc(BUFSIZE, "I/O buffer");
99 while ((o = opt_next()) != OPT_EOF) {
100 switch (o) {
101 default:
102 opthelp:
103 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
104 goto err;
105 case OPT_HELP:
106 opt_help(mac_options);
107 ret = 0;
108 goto err;
109 case OPT_BIN:
110 out_bin = 1;
111 break;
112 case OPT_IN:
113 infile = opt_arg();
114 break;
115 case OPT_OUT:
116 outfile = opt_arg();
117 break;
118 case OPT_MACOPT:
119 if (opts == NULL)
120 opts = sk_OPENSSL_STRING_new_null();
121 if (opts == NULL || !sk_OPENSSL_STRING_push(opts, opt_arg()))
122 goto opthelp;
123 break;
124 case OPT_CIPHER:
125 OPENSSL_free(cipher);
126 cipher = alloc_mac_algorithm_name(&opts, "cipher", opt_arg());
127 if (cipher == NULL)
128 goto opthelp;
129 break;
130 case OPT_DIGEST:
131 OPENSSL_free(digest);
132 digest = alloc_mac_algorithm_name(&opts, "digest", opt_arg());
133 if (digest == NULL)
134 goto opthelp;
135 break;
136 case OPT_PROV_CASES:
137 if (!opt_provider(o))
138 goto err;
139 break;
140 }
141 }
142
143 /* One argument, the MAC name. */
144 if (!opt_check_rest_arg("MAC name"))
145 goto opthelp;
146 argv = opt_rest();
147
148 mac = EVP_MAC_fetch(app_get0_libctx(), argv[0], app_get0_propq());
149 if (mac == NULL) {
150 BIO_printf(bio_err, "Invalid MAC name %s\n", argv[0]);
151 goto opthelp;
152 }
153
154 ctx = EVP_MAC_CTX_new(mac);
155 if (ctx == NULL)
156 goto err;
157
158 if (opts != NULL) {
159 int ok = 1;
160
161 params = app_params_new_from_opts(opts,
162 EVP_MAC_settable_ctx_params(mac));
163 if (params == NULL)
164 goto err;
165
166 if (!EVP_MAC_CTX_set_params(ctx, params)) {
167 BIO_printf(bio_err, "MAC parameter error\n");
168 ERR_print_errors(bio_err);
169 ok = 0;
170 }
171 app_params_free(params);
172 if (!ok)
173 goto err;
174 }
175
176 in = bio_open_default(infile, 'r', inform);
177 if (in == NULL)
178 goto err;
179
180 out = bio_open_default(outfile, 'w', out_bin ? FORMAT_BINARY : FORMAT_TEXT);
181 if (out == NULL)
182 goto err;
183
184 if (!EVP_MAC_init(ctx, NULL, 0, NULL)) {
185 BIO_printf(bio_err, "EVP_MAC_Init failed\n");
186 goto err;
187 }
188
189 while (BIO_pending(in) || !BIO_eof(in)) {
190 i = BIO_read(in, (char *)buf, BUFSIZE);
191 if (i < 0) {
192 BIO_printf(bio_err, "Read Error in '%s'\n", infile);
193 ERR_print_errors(bio_err);
194 goto err;
195 }
196 if (i == 0)
197 break;
198 if (!EVP_MAC_update(ctx, buf, i)) {
199 BIO_printf(bio_err, "EVP_MAC_update failed\n");
200 goto err;
201 }
202 }
203
204 if (!EVP_MAC_final(ctx, NULL, &len, 0)) {
205 BIO_printf(bio_err, "EVP_MAC_final failed\n");
206 goto err;
207 }
208 if (len > BUFSIZE) {
209 BIO_printf(bio_err, "output len is too large\n");
210 goto err;
211 }
212
213 if (!EVP_MAC_final(ctx, buf, &len, BUFSIZE)) {
214 BIO_printf(bio_err, "EVP_MAC_final failed\n");
215 goto err;
216 }
217
218 if (out_bin) {
219 BIO_write(out, buf, len);
220 } else {
221 for (i = 0; i < (int)len; ++i)
222 BIO_printf(out, "%02X", buf[i]);
223 if (outfile == NULL)
224 BIO_printf(out, "\n");
225 }
226
227 ret = 0;
228 err:
229 if (ret != 0)
230 ERR_print_errors(bio_err);
231 OPENSSL_clear_free(buf, BUFSIZE);
232 OPENSSL_free(cipher);
233 OPENSSL_free(digest);
234 sk_OPENSSL_STRING_free(opts);
235 BIO_free(in);
236 BIO_free(out);
237 EVP_MAC_CTX_free(ctx);
238 EVP_MAC_free(mac);
239 return ret;
240 }
241