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/*
* Copyright 2018-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <string.h>
#include "apps.h"
#include "progs.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/params.h>
DEFINE_STACK_OF_STRING()
#undef BUFSIZE
#define BUFSIZE 1024*8
typedef enum OPTION_choice {
OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
OPT_MACOPT, OPT_BIN, OPT_IN, OPT_OUT,
OPT_PROV_ENUM
} OPTION_CHOICE;
const OPTIONS mac_options[] = {
{OPT_HELP_STR, 1, '-', "Usage: %s [options] mac_name\n"},
OPT_SECTION("General"),
{"help", OPT_HELP, '-', "Display this summary"},
{"macopt", OPT_MACOPT, 's', "MAC algorithm parameters in n:v form"},
{OPT_MORE_STR, 1, '-', "See 'PARAMETER NAMES' in the EVP_MAC_ docs"},
OPT_SECTION("Input"),
{"in", OPT_IN, '<', "Input file to MAC (default is stdin)"},
OPT_SECTION("Output"),
{"out", OPT_OUT, '>', "Output to filename rather than stdout"},
{"binary", OPT_BIN, '-',
"Output in binary format (default is hexadecimal)"},
OPT_PROV_OPTIONS,
OPT_PARAMETERS(),
{"mac_name", 0, 0, "MAC algorithm"},
{NULL}
};
int mac_main(int argc, char **argv)
{
int ret = 1;
char *prog;
EVP_MAC *mac = NULL;
OPTION_CHOICE o;
EVP_MAC_CTX *ctx = NULL;
STACK_OF(OPENSSL_STRING) *opts = NULL;
unsigned char *buf = NULL;
size_t len;
int i;
BIO *in = NULL, *out = NULL;
const char *outfile = NULL;
const char *infile = NULL;
int out_bin = 0;
int inform = FORMAT_BINARY;
prog = opt_init(argc, argv, mac_options);
buf = app_malloc(BUFSIZE, "I/O buffer");
while ((o = opt_next()) != OPT_EOF) {
switch (o) {
default:
opthelp:
BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
goto err;
case OPT_HELP:
opt_help(mac_options);
ret = 0;
goto err;
case OPT_BIN:
out_bin = 1;
break;
case OPT_IN:
infile = opt_arg();
break;
case OPT_OUT:
outfile = opt_arg();
break;
case OPT_MACOPT:
if (opts == NULL)
opts = sk_OPENSSL_STRING_new_null();
if (opts == NULL || !sk_OPENSSL_STRING_push(opts, opt_arg()))
goto opthelp;
break;
case OPT_PROV_CASES:
if (!opt_provider(o))
goto err;
break;
}
}
argc = opt_num_rest();
argv = opt_rest();
if (argc != 1) {
BIO_printf(bio_err, "Invalid number of extra arguments\n");
goto opthelp;
}
mac = EVP_MAC_fetch(NULL, argv[0], NULL);
if (mac == NULL) {
BIO_printf(bio_err, "Invalid MAC name %s\n", argv[0]);
goto opthelp;
}
ctx = EVP_MAC_CTX_new(mac);
if (ctx == NULL)
goto err;
if (opts != NULL) {
int ok = 1;
OSSL_PARAM *params =
app_params_new_from_opts(opts, EVP_MAC_settable_ctx_params(mac));
if (params == NULL)
goto err;
if (!EVP_MAC_CTX_set_params(ctx, params)) {
BIO_printf(bio_err, "MAC parameter error\n");
ERR_print_errors(bio_err);
ok = 0;
}
app_params_free(params);
if (!ok)
goto err;
}
/* Use text mode for stdin */
if (infile == NULL || strcmp(infile, "-") == 0)
inform = FORMAT_TEXT;
in = bio_open_default(infile, 'r', inform);
if (in == NULL)
goto err;
out = bio_open_default(outfile, 'w', out_bin ? FORMAT_BINARY : FORMAT_TEXT);
if (out == NULL)
goto err;
if (!EVP_MAC_init(ctx)) {
BIO_printf(bio_err, "EVP_MAC_Init failed\n");
goto err;
}
for (;;) {
i = BIO_read(in, (char *)buf, BUFSIZE);
if (i < 0) {
BIO_printf(bio_err, "Read Error in '%s'\n", infile);
goto err;
}
if (i == 0)
break;
if (!EVP_MAC_update(ctx, buf, i)) {
BIO_printf(bio_err, "EVP_MAC_update failed\n");
goto err;
}
}
if (!EVP_MAC_final(ctx, NULL, &len, 0)) {
BIO_printf(bio_err, "EVP_MAC_final failed\n");
goto err;
}
if (len > BUFSIZE) {
BIO_printf(bio_err, "output len is too large\n");
goto err;
}
if (!EVP_MAC_final(ctx, buf, &len, BUFSIZE)) {
BIO_printf(bio_err, "EVP_MAC_final failed\n");
goto err;
}
if (out_bin) {
BIO_write(out, buf, len);
} else {
if (outfile == NULL)
BIO_printf(out,"\n");
for (i = 0; i < (int)len; ++i)
BIO_printf(out, "%02X", buf[i]);
if (outfile == NULL)
BIO_printf(out,"\n");
}
ret = 0;
err:
if (ret != 0)
ERR_print_errors(bio_err);
OPENSSL_clear_free(buf, BUFSIZE);
sk_OPENSSL_STRING_free(opts);
BIO_free(in);
BIO_free(out);
EVP_MAC_CTX_free(ctx);
EVP_MAC_free(mac);
return ret;
}
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