apps/fipsinstall.c

   1 /*
   2  * Copyright 2019 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 #include <openssl/evp.h>
  12 #include <openssl/err.h>
  13 #include <openssl/provider.h>
  14 #include <openssl/params.h>
  15 #include <openssl/fips_names.h>
  16 #include "apps.h"
  17 #include "progs.h"
  18
  19 #define BUFSIZE 4096
  20 #define DEFAULT_MAC_NAME "HMAC"
  21 #define DEFAULT_FIPS_SECTION "fips_check_section"
  22
  23 /* Configuration file values */
  24 #define VERSION_KEY  "version"
  25 #define VERSION_VAL  "1"
  26 #define INSTALL_STATUS_VAL "INSTALL_SELF_TEST_KATS_RUN"
  27
  28 typedef enum OPTION_choice {
  29     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  30     OPT_IN, OPT_OUT, OPT_MODULE,
  31     OPT_PROV_NAME, OPT_SECTION_NAME, OPT_MAC_NAME, OPT_MACOPT, OPT_VERIFY
  32 } OPTION_CHOICE;
  33
  34 const OPTIONS fipsinstall_options[] = {
  35     OPT_SECTION("General"),
  36     {"help", OPT_HELP, '-', "Display this summary"},
  37     {"verify", OPT_VERIFY, '-',
  38         "Verify a config file instead of generating one"},
  39     {"module", OPT_MODULE, '<', "File name of the provider module"},
  40     {"provider_name", OPT_PROV_NAME, 's', "FIPS provider name"},
  41     {"section_name", OPT_SECTION_NAME, 's',
  42      "FIPS Provider config section name (optional)"},
  43
  44     OPT_SECTION("Input"),
  45     {"in", OPT_IN, '<', "Input config file, used when verifying"},
  46
  47     OPT_SECTION("Output"),
  48     {"out", OPT_OUT, '>', "Output config file, used when generating"},
  49     {"mac_name", OPT_MAC_NAME, 's', "MAC name"},
  50     {"macopt", OPT_MACOPT, 's', "MAC algorithm parameters in n:v form. "
  51                                 "See 'PARAMETER NAMES' in the EVP_MAC_ docs"},
  52     {NULL}
  53 };
  54
  55 static int do_mac(EVP_MAC_CTX *ctx, unsigned char *tmp, BIO *in,
  56                   unsigned char *out, size_t *out_len)
  57 {
  58     int ret = 0;
  59     int i;
  60     size_t outsz = *out_len;
  61
  62     if (!EVP_MAC_init(ctx))
  63         goto err;
  64     if (EVP_MAC_size(ctx) > outsz)
  65         goto end;
  66     while ((i = BIO_read(in, (char *)tmp, BUFSIZE)) != 0) {
  67         if (i < 0 || !EVP_MAC_update(ctx, tmp, i))
  68             goto err;
  69     }
  70 end:
  71     if (!EVP_MAC_final(ctx, out, out_len, outsz))
  72         goto err;
  73     ret = 1;
  74 err:
  75     return ret;
  76 }
  77
  78 static int load_fips_prov_and_run_self_test(const char *prov_name)
  79 {
  80     int ret = 0;
  81     OSSL_PROVIDER *prov = NULL;
  82
  83     prov = OSSL_PROVIDER_load(NULL, prov_name);
  84     if (prov == NULL) {
  85         BIO_printf(bio_err, "Failed to load FIPS module\n");
  86         goto end;
  87     }
  88     ret = 1;
  89 end:
  90     OSSL_PROVIDER_unload(prov);
  91     return ret;
  92 }
  93
  94 static int print_mac(BIO *bio, const char *label, const unsigned char *mac,
  95                      size_t len)
  96 {
  97     int ret;
  98     char *hexstr = NULL;
  99
 100     hexstr = OPENSSL_buf2hexstr(mac, (long)len);
 101     if (hexstr == NULL)
 102         return 0;
 103     ret = BIO_printf(bio, "%s = %s\n", label, hexstr);
 104     OPENSSL_free(hexstr);
 105     return ret;
 106 }
 107
 108 static int write_config_header(BIO *out, const char *prov_name,
 109                                const char *section)
 110 {
 111     return BIO_printf(out, "openssl_conf = openssl_init\n\n")
 112            && BIO_printf(out, "[openssl_init]\n")
 113            && BIO_printf(out, "providers = provider_section\n\n")
 114            && BIO_printf(out, "[provider_section]\n")
 115            && BIO_printf(out, "%s = %s\n\n", prov_name, section);
 116 }
 117
 118 /*
 119  * Outputs a fips related config file that contains entries for the fips
 120  * module checksum and the installation indicator checksum.
 121  *
 122  * Returns 1 if the config file is written otherwise it returns 0 on error.
 123  */
 124 static int write_config_fips_section(BIO *out, const char *section,
 125                                      unsigned char *module_mac,
 126                                      size_t module_mac_len,
 127                                      unsigned char *install_mac,
 128                                      size_t install_mac_len)
 129 {
 130     int ret = 0;
 131
 132     if (!(BIO_printf(out, "[%s]\n", section) > 0
 133           && BIO_printf(out, "activate = 1\n") > 0
 134           && BIO_printf(out, "%s = %s\n", OSSL_PROV_FIPS_PARAM_INSTALL_VERSION,
 135                         VERSION_VAL) > 0
 136           && print_mac(out, OSSL_PROV_FIPS_PARAM_MODULE_MAC, module_mac,
 137                        module_mac_len)))
 138         goto end;
 139
 140     if (install_mac != NULL) {
 141         if (!(print_mac(out, OSSL_PROV_FIPS_PARAM_INSTALL_MAC, install_mac,
 142                       install_mac_len)
 143               && BIO_printf(out, "%s = %s\n",
 144                             OSSL_PROV_FIPS_PARAM_INSTALL_STATUS,
 145                             INSTALL_STATUS_VAL) > 0))
 146         goto end;
 147     }
 148     ret = 1;
 149 end:
 150     return ret;
 151 }
 152
 153 static CONF *generate_config_and_load(const char *prov_name,
 154                                       const char *section,
 155                                       unsigned char *module_mac,
 156                                       size_t module_mac_len)
 157 {
 158     BIO *mem_bio = NULL;
 159     CONF *conf = NULL;
 160
 161     mem_bio = BIO_new(BIO_s_mem());
 162     if (mem_bio  == NULL)
 163         return 0;
 164     if (!write_config_header(mem_bio, prov_name, section)
 165          || !write_config_fips_section(mem_bio, section, module_mac,
 166                                        module_mac_len, NULL, 0))
 167         goto end;
 168
 169     conf = app_load_config_bio(mem_bio, NULL);
 170     if (conf == NULL)
 171         goto end;
 172
 173     if (CONF_modules_load(conf, NULL, 0) <= 0)
 174         goto end;
 175     BIO_free(mem_bio);
 176     return conf;
 177 end:
 178     NCONF_free(conf);
 179     BIO_free(mem_bio);
 180     return NULL;
 181 }
 182
 183 static void free_config_and_unload(CONF *conf)
 184 {
 185     if (conf != NULL) {
 186         NCONF_free(conf);
 187         CONF_modules_unload(1);
 188     }
 189 }
 190
 191 /*
 192  * Returns 1 if the config file entries match the passed in module_mac and
 193  * install_mac values, otherwise it returns 0.
 194  */
 195 static int verify_config(const char *infile, const char *section,
 196                          unsigned char *module_mac, size_t module_mac_len,
 197                          unsigned char *install_mac, size_t install_mac_len)
 198 {
 199     int ret = 0;
 200     char *s = NULL;
 201     unsigned char *buf1 = NULL, *buf2 = NULL;
 202     long len;
 203     CONF *conf = NULL;
 204
 205     /* read in the existing values and check they match the saved values */
 206     conf = app_load_config(infile);
 207     if (conf == NULL)
 208         goto end;
 209
 210     s = NCONF_get_string(conf, section, OSSL_PROV_FIPS_PARAM_INSTALL_VERSION);
 211     if (s == NULL || strcmp(s, VERSION_VAL) != 0) {
 212         BIO_printf(bio_err, "version not found\n");
 213         goto end;
 214     }
 215     s = NCONF_get_string(conf, section, OSSL_PROV_FIPS_PARAM_INSTALL_STATUS);
 216     if (s == NULL || strcmp(s, INSTALL_STATUS_VAL) != 0) {
 217         BIO_printf(bio_err, "install status not found\n");
 218         goto end;
 219     }
 220     s = NCONF_get_string(conf, section, OSSL_PROV_FIPS_PARAM_MODULE_MAC);
 221     if (s == NULL) {
 222         BIO_printf(bio_err, "Module integrity MAC not found\n");
 223         goto end;
 224     }
 225     buf1 = OPENSSL_hexstr2buf(s, &len);
 226     if (buf1 == NULL
 227             || (size_t)len != module_mac_len
 228             || memcmp(module_mac, buf1, module_mac_len) != 0) {
 229         BIO_printf(bio_err, "Module integrity mismatch\n");
 230         goto end;
 231     }
 232     s = NCONF_get_string(conf, section, OSSL_PROV_FIPS_PARAM_INSTALL_MAC);
 233     if (s == NULL) {
 234         BIO_printf(bio_err, "Install indicator MAC not found\n");
 235         goto end;
 236     }
 237     buf2 = OPENSSL_hexstr2buf(s, &len);
 238     if (buf2 == NULL
 239             || (size_t)len != install_mac_len
 240             || memcmp(install_mac, buf2, install_mac_len) != 0) {
 241         BIO_printf(bio_err, "Install indicator status mismatch\n");
 242         goto end;
 243     }
 244     ret = 1;
 245 end:
 246     OPENSSL_free(buf1);
 247     OPENSSL_free(buf2);
 248     NCONF_free(conf);
 249     return ret;
 250 }
 251
 252 int fipsinstall_main(int argc, char **argv)
 253 {
 254     int ret = 1, verify = 0;
 255     BIO *module_bio = NULL, *mem_bio = NULL, *fout = NULL;
 256     char *in_fname = NULL, *out_fname = NULL, *prog, *section_name = NULL;
 257     char *prov_name = NULL, *module_fname = NULL;
 258     static const char *mac_name = DEFAULT_MAC_NAME;
 259     EVP_MAC_CTX *ctx = NULL, *ctx2 = NULL;
 260     STACK_OF(OPENSSL_STRING) *opts = NULL;
 261     OPTION_CHOICE o;
 262     unsigned char *read_buffer = NULL;
 263     unsigned char module_mac[EVP_MAX_MD_SIZE];
 264     size_t module_mac_len = EVP_MAX_MD_SIZE;
 265     unsigned char install_mac[EVP_MAX_MD_SIZE];
 266     size_t install_mac_len = EVP_MAX_MD_SIZE;
 267     EVP_MAC *mac = NULL;
 268     CONF *conf = NULL;
 269
 270     section_name = DEFAULT_FIPS_SECTION;
 271
 272     prog = opt_init(argc, argv, fipsinstall_options);
 273     while ((o = opt_next()) != OPT_EOF) {
 274         switch (o) {
 275         case OPT_EOF:
 276         case OPT_ERR:
 277 opthelp:
 278             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 279             goto end;
 280         case OPT_HELP:
 281             opt_help(fipsinstall_options);
 282             ret = 0;
 283             goto end;
 284         case OPT_IN:
 285             in_fname = opt_arg();
 286             break;
 287         case OPT_OUT:
 288             out_fname = opt_arg();
 289             break;
 290         case OPT_PROV_NAME:
 291             prov_name = opt_arg();
 292             break;
 293         case OPT_MODULE:
 294             module_fname = opt_arg();
 295             break;
 296         case OPT_SECTION_NAME:
 297             section_name = opt_arg();
 298             break;
 299         case OPT_MAC_NAME:
 300             mac_name = opt_arg();
 301             break;
 302         case OPT_MACOPT:
 303             if (opts == NULL)
 304                 opts = sk_OPENSSL_STRING_new_null();
 305             if (opts == NULL || !sk_OPENSSL_STRING_push(opts, opt_arg()))
 306                 goto opthelp;
 307             break;
 308         case OPT_VERIFY:
 309             verify = 1;
 310             break;
 311         }
 312     }
 313     argc = opt_num_rest();
 314     if (module_fname == NULL
 315         || (verify && in_fname == NULL)
 316         || (!verify && (out_fname == NULL || prov_name == NULL))
 317         || opts == NULL
 318         || argc != 0)
 319         goto opthelp;
 320
 321     module_bio = bio_open_default(module_fname, 'r', FORMAT_BINARY);
 322     if (module_bio == NULL) {
 323         BIO_printf(bio_err, "Failed to open module file\n");
 324         goto end;
 325     }
 326
 327     read_buffer = app_malloc(BUFSIZE, "I/O buffer");
 328     if (read_buffer == NULL)
 329         goto end;
 330
 331     mac = EVP_MAC_fetch(NULL, mac_name, NULL);
 332     if (mac == NULL) {
 333         BIO_printf(bio_err, "Unable to get MAC of type %s\n", mac_name);
 334         goto end;
 335     }
 336
 337     ctx = EVP_MAC_CTX_new(mac);
 338     if (ctx == NULL) {
 339         BIO_printf(bio_err, "Unable to create MAC CTX for module check\n");
 340         goto end;
 341     }
 342
 343     if (opts != NULL) {
 344         int ok = 1;
 345         OSSL_PARAM *params =
 346             app_params_new_from_opts(opts, EVP_MAC_settable_ctx_params(mac));
 347
 348         if (params == NULL)
 349             goto end;
 350
 351         if (!EVP_MAC_CTX_set_params(ctx, params)) {
 352             BIO_printf(bio_err, "MAC parameter error\n");
 353             ERR_print_errors(bio_err);
 354             ok = 0;
 355         }
 356         app_params_free(params);
 357         if (!ok)
 358             goto end;
 359     }
 360
 361     ctx2 = EVP_MAC_CTX_dup(ctx);
 362     if (ctx2 == NULL) {
 363         BIO_printf(bio_err, "Unable to create MAC CTX for install indicator\n");
 364         goto end;
 365     }
 366
 367     if (!do_mac(ctx, read_buffer, module_bio, module_mac, &module_mac_len))
 368         goto end;
 369
 370     mem_bio = BIO_new_mem_buf((const void *)INSTALL_STATUS_VAL,
 371                               strlen(INSTALL_STATUS_VAL));
 372     if (mem_bio == NULL) {
 373         BIO_printf(bio_err, "Unable to create memory BIO\n");
 374         goto end;
 375     }
 376     if (!do_mac(ctx2, read_buffer, mem_bio, install_mac, &install_mac_len))
 377         goto end;
 378
 379     if (verify) {
 380         if (!verify_config(in_fname, section_name, module_mac, module_mac_len,
 381                            install_mac, install_mac_len))
 382             goto end;
 383         BIO_printf(bio_out, "VERIFY PASSED\n");
 384     } else {
 385
 386         conf = generate_config_and_load(prov_name, section_name, module_mac,
 387                                         module_mac_len);
 388         if (conf == NULL)
 389             goto end;
 390         if (!load_fips_prov_and_run_self_test(prov_name))
 391             goto end;
 392
 393         fout = bio_open_default(out_fname, 'w', FORMAT_TEXT);
 394         if (fout == NULL) {
 395             BIO_printf(bio_err, "Failed to open file\n");
 396             goto end;
 397         }
 398         if (!write_config_fips_section(fout, section_name, module_mac,
 399                                        module_mac_len, install_mac,
 400                                        install_mac_len))
 401             goto end;
 402         BIO_printf(bio_out, "INSTALL PASSED\n");
 403     }
 404
 405     ret = 0;
 406 end:
 407     if (ret == 1) {
 408         BIO_printf(bio_err, "%s FAILED\n", verify ? "VERIFY" : "INSTALL");
 409         ERR_print_errors(bio_err);
 410     }
 411
 412     BIO_free(fout);
 413     BIO_free(mem_bio);
 414     BIO_free(module_bio);
 415     sk_OPENSSL_STRING_free(opts);
 416     EVP_MAC_free(mac);
 417     EVP_MAC_CTX_free(ctx2);
 418     EVP_MAC_CTX_free(ctx);
 419     OPENSSL_free(read_buffer);
 420     free_config_and_unload(conf);
 421     return ret;
 422 }