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, OPT_BIN, OPT_IN, OPT_OUT,
26 OPT_CIPHER, OPT_DIGEST,
27 OPT_PROV_ENUM
28 } OPTION_CHOICE;
29
30 const OPTIONS mac_options[] = {
31 {OPT_HELP_STR, 1, '-', "Usage: %s [options] mac_name\n"},
32
33 OPT_SECTION("General"),
34 {"help", OPT_HELP, '-', "Display this summary"},
35 {"macopt", OPT_MACOPT, 's', "MAC algorithm parameters in n:v form"},
36 {"cipher", OPT_CIPHER, 's', "Cipher"},
37 {"digest", OPT_DIGEST, 's', "Digest"},
38 {OPT_MORE_STR, 1, '-', "See 'PARAMETER NAMES' in the EVP_MAC_ docs"},
39
40 OPT_SECTION("Input"),
41 {"in", OPT_IN, '<', "Input file to MAC (default is stdin)"},
42
43 OPT_SECTION("Output"),
44 {"out", OPT_OUT, '>', "Output to filename rather than stdout"},
45 {"binary", OPT_BIN, '-',
46 "Output in binary format (default is hexadecimal)"},
47
48 OPT_PROV_OPTIONS,
49
50 OPT_PARAMETERS(),
51 {"mac_name", 0, 0, "MAC algorithm"},
52 {NULL}
53 };
54
alloc_mac_algorithm_name(STACK_OF (OPENSSL_STRING)** optp,const char * name,const char * arg)55 static char *alloc_mac_algorithm_name(STACK_OF(OPENSSL_STRING) **optp,
56 const char *name, const char *arg)
57 {
58 size_t len = strlen(name) + strlen(arg) + 2;
59 char *res;
60
61 if (*optp == NULL)
62 *optp = sk_OPENSSL_STRING_new_null();
63 if (*optp == NULL)
64 return NULL;
65
66 res = app_malloc(len, "algorithm name");
67 BIO_snprintf(res, len, "%s:%s", name, arg);
68 if (sk_OPENSSL_STRING_push(*optp, res))
69 return res;
70 OPENSSL_free(res);
71 return NULL;
72 }
73
mac_main(int argc,char ** argv)74 int mac_main(int argc, char **argv)
75 {
76 int ret = 1;
77 char *prog;
78 EVP_MAC *mac = NULL;
79 OPTION_CHOICE o;
80 EVP_MAC_CTX *ctx = NULL;
81 STACK_OF(OPENSSL_STRING) *opts = NULL;
82 unsigned char *buf = NULL;
83 size_t len;
84 int i;
85 BIO *in = NULL, *out = NULL;
86 const char *outfile = NULL;
87 const char *infile = NULL;
88 int out_bin = 0;
89 int inform = FORMAT_BINARY;
90 char *digest = NULL, *cipher = NULL;
91 OSSL_PARAM *params = NULL;
92
93 prog = opt_init(argc, argv, mac_options);
94 buf = app_malloc(BUFSIZE, "I/O buffer");
95 while ((o = opt_next()) != OPT_EOF) {
96 switch (o) {
97 default:
98 opthelp:
99 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
100 goto err;
101 case OPT_HELP:
102 opt_help(mac_options);
103 ret = 0;
104 goto err;
105 case OPT_BIN:
106 out_bin = 1;
107 break;
108 case OPT_IN:
109 infile = opt_arg();
110 break;
111 case OPT_OUT:
112 outfile = opt_arg();
113 break;
114 case OPT_MACOPT:
115 if (opts == NULL)
116 opts = sk_OPENSSL_STRING_new_null();
117 if (opts == NULL || !sk_OPENSSL_STRING_push(opts, opt_arg()))
118 goto opthelp;
119 break;
120 case OPT_CIPHER:
121 OPENSSL_free(cipher);
122 cipher = alloc_mac_algorithm_name(&opts, "cipher", opt_arg());
123 if (cipher == NULL)
124 goto opthelp;
125 break;
126 case OPT_DIGEST:
127 OPENSSL_free(digest);
128 digest = alloc_mac_algorithm_name(&opts, "digest", opt_arg());
129 if (digest == NULL)
130 goto opthelp;
131 break;
132 case OPT_PROV_CASES:
133 if (!opt_provider(o))
134 goto err;
135 break;
136 }
137 }
138
139 /* One argument, the MAC name. */
140 if (!opt_check_rest_arg("MAC name"))
141 goto opthelp;
142 argv = opt_rest();
143
144 mac = EVP_MAC_fetch(app_get0_libctx(), argv[0], app_get0_propq());
145 if (mac == NULL) {
146 BIO_printf(bio_err, "Invalid MAC name %s\n", argv[0]);
147 goto opthelp;
148 }
149
150 ctx = EVP_MAC_CTX_new(mac);
151 if (ctx == NULL)
152 goto err;
153
154 if (opts != NULL) {
155 int ok = 1;
156
157 params = app_params_new_from_opts(opts,
158 EVP_MAC_settable_ctx_params(mac));
159 if (params == NULL)
160 goto err;
161
162 if (!EVP_MAC_CTX_set_params(ctx, params)) {
163 BIO_printf(bio_err, "MAC parameter error\n");
164 ERR_print_errors(bio_err);
165 ok = 0;
166 }
167 app_params_free(params);
168 if (!ok)
169 goto err;
170 }
171
172 in = bio_open_default(infile, 'r', inform);
173 if (in == NULL)
174 goto err;
175
176 out = bio_open_default(outfile, 'w', out_bin ? FORMAT_BINARY : FORMAT_TEXT);
177 if (out == NULL)
178 goto err;
179
180 if (!EVP_MAC_init(ctx, NULL, 0, NULL)) {
181 BIO_printf(bio_err, "EVP_MAC_Init failed\n");
182 goto err;
183 }
184
185 while (BIO_pending(in) || !BIO_eof(in)) {
186 i = BIO_read(in, (char *)buf, BUFSIZE);
187 if (i < 0) {
188 BIO_printf(bio_err, "Read Error in '%s'\n", infile);
189 ERR_print_errors(bio_err);
190 goto err;
191 }
192 if (i == 0)
193 break;
194 if (!EVP_MAC_update(ctx, buf, i)) {
195 BIO_printf(bio_err, "EVP_MAC_update failed\n");
196 goto err;
197 }
198 }
199
200 if (!EVP_MAC_final(ctx, NULL, &len, 0)) {
201 BIO_printf(bio_err, "EVP_MAC_final failed\n");
202 goto err;
203 }
204 if (len > BUFSIZE) {
205 BIO_printf(bio_err, "output len is too large\n");
206 goto err;
207 }
208
209 if (!EVP_MAC_final(ctx, buf, &len, BUFSIZE)) {
210 BIO_printf(bio_err, "EVP_MAC_final failed\n");
211 goto err;
212 }
213
214 if (out_bin) {
215 BIO_write(out, buf, len);
216 } else {
217 for (i = 0; i < (int)len; ++i)
218 BIO_printf(out, "%02X", buf[i]);
219 if (outfile == NULL)
220 BIO_printf(out, "\n");
221 }
222
223 ret = 0;
224 err:
225 if (ret != 0)
226 ERR_print_errors(bio_err);
227 OPENSSL_clear_free(buf, BUFSIZE);
228 OPENSSL_free(cipher);
229 OPENSSL_free(digest);
230 sk_OPENSSL_STRING_free(opts);
231 BIO_free(in);
232 BIO_free(out);
233 EVP_MAC_CTX_free(ctx);
234 EVP_MAC_free(mac);
235 return ret;
236 }
237
