apps/dgst.c

   1 /*
   2  * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (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 <stdio.h>
  11 #include <string.h>
  12 #include <stdlib.h>
  13 #include "apps.h"
  14 #include "progs.h"
  15 #include <openssl/bio.h>
  16 #include <openssl/err.h>
  17 #include <openssl/evp.h>
  18 #include <openssl/objects.h>
  19 #include <openssl/x509.h>
  20 #include <openssl/pem.h>
  21 #include <openssl/hmac.h>
  22
  23 #undef BUFSIZE
  24 #define BUFSIZE 1024*8
  25
  26 int do_fp(BIO *out, unsigned char *buf, BIO *bp, int sep, int binout,
  27           EVP_PKEY *key, unsigned char *sigin, int siglen,
  28           const char *sig_name, const char *md_name,
  29           const char *file);
  30
  31 typedef enum OPTION_choice {
  32     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  33     OPT_C, OPT_R, OPT_OUT, OPT_SIGN, OPT_PASSIN, OPT_VERIFY,
  34     OPT_PRVERIFY, OPT_SIGNATURE, OPT_KEYFORM, OPT_ENGINE, OPT_ENGINE_IMPL,
  35     OPT_HEX, OPT_BINARY, OPT_DEBUG, OPT_FIPS_FINGERPRINT,
  36     OPT_HMAC, OPT_MAC, OPT_SIGOPT, OPT_MACOPT,
  37     OPT_DIGEST,
  38     OPT_R_ENUM
  39 } OPTION_CHOICE;
  40
  41 const OPTIONS dgst_options[] = {
  42     {OPT_HELP_STR, 1, '-', "Usage: %s [options] [file...]\n"},
  43     {OPT_HELP_STR, 1, '-',
  44         "  file... files to digest (default is stdin)\n"},
  45     {"help", OPT_HELP, '-', "Display this summary"},
  46     {"c", OPT_C, '-', "Print the digest with separating colons"},
  47     {"r", OPT_R, '-', "Print the digest in coreutils format"},
  48     {"out", OPT_OUT, '>', "Output to filename rather than stdout"},
  49     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  50     {"sign", OPT_SIGN, 's', "Sign digest using private key"},
  51     {"verify", OPT_VERIFY, 's',
  52      "Verify a signature using public key"},
  53     {"prverify", OPT_PRVERIFY, 's',
  54      "Verify a signature using private key"},
  55     {"signature", OPT_SIGNATURE, '<', "File with signature to verify"},
  56     {"keyform", OPT_KEYFORM, 'f', "Key file format (PEM or ENGINE)"},
  57     {"hex", OPT_HEX, '-', "Print as hex dump"},
  58     {"binary", OPT_BINARY, '-', "Print in binary form"},
  59     {"d", OPT_DEBUG, '-', "Print debug info"},
  60     {"debug", OPT_DEBUG, '-', "Print debug info"},
  61     {"fips-fingerprint", OPT_FIPS_FINGERPRINT, '-',
  62      "Compute HMAC with the key used in OpenSSL-FIPS fingerprint"},
  63     {"hmac", OPT_HMAC, 's', "Create hashed MAC with key"},
  64     {"mac", OPT_MAC, 's', "Create MAC (not necessarily HMAC)"},
  65     {"sigopt", OPT_SIGOPT, 's', "Signature parameter in n:v form"},
  66     {"macopt", OPT_MACOPT, 's', "MAC algorithm parameters in n:v form or key"},
  67     {"", OPT_DIGEST, '-', "Any supported digest"},
  68     OPT_R_OPTIONS,
  69 #ifndef OPENSSL_NO_ENGINE
  70     {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
  71     {"engine_impl", OPT_ENGINE_IMPL, '-',
  72      "Also use engine given by -engine for digest operations"},
  73 #endif
  74     {NULL}
  75 };
  76
  77 int dgst_main(int argc, char **argv)
  78 {
  79     BIO *in = NULL, *inp, *bmd = NULL, *out = NULL;
  80     ENGINE *e = NULL, *impl = NULL;
  81     EVP_PKEY *sigkey = NULL;
  82     STACK_OF(OPENSSL_STRING) *sigopts = NULL, *macopts = NULL;
  83     char *hmac_key = NULL;
  84     char *mac_name = NULL;
  85     char *passinarg = NULL, *passin = NULL;
  86     const EVP_MD *md = NULL, *m;
  87     const char *outfile = NULL, *keyfile = NULL, *prog = NULL;
  88     const char *sigfile = NULL;
  89     OPTION_CHOICE o;
  90     int separator = 0, debug = 0, keyform = FORMAT_PEM, siglen = 0;
  91     int i, ret = 1, out_bin = -1, want_pub = 0, do_verify = 0;
  92     unsigned char *buf = NULL, *sigbuf = NULL;
  93     int engine_impl = 0;
  94
  95     prog = opt_progname(argv[0]);
  96     buf = app_malloc(BUFSIZE, "I/O buffer");
  97     md = EVP_get_digestbyname(prog);
  98
  99     prog = opt_init(argc, argv, dgst_options);
 100     while ((o = opt_next()) != OPT_EOF) {
 101         switch (o) {
 102         case OPT_EOF:
 103         case OPT_ERR:
 104  opthelp:
 105             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 106             goto end;
 107         case OPT_HELP:
 108             opt_help(dgst_options);
 109             ret = 0;
 110             goto end;
 111         case OPT_C:
 112             separator = 1;
 113             break;
 114         case OPT_R:
 115             separator = 2;
 116             break;
 117         case OPT_R_CASES:
 118             if (!opt_rand(o))
 119                 goto end;
 120             break;
 121         case OPT_OUT:
 122             outfile = opt_arg();
 123             break;
 124         case OPT_SIGN:
 125             keyfile = opt_arg();
 126             break;
 127         case OPT_PASSIN:
 128             passinarg = opt_arg();
 129             break;
 130         case OPT_VERIFY:
 131             keyfile = opt_arg();
 132             want_pub = do_verify = 1;
 133             break;
 134         case OPT_PRVERIFY:
 135             keyfile = opt_arg();
 136             do_verify = 1;
 137             break;
 138         case OPT_SIGNATURE:
 139             sigfile = opt_arg();
 140             break;
 141         case OPT_KEYFORM:
 142             if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyform))
 143                 goto opthelp;
 144             break;
 145         case OPT_ENGINE:
 146             e = setup_engine(opt_arg(), 0);
 147             break;
 148         case OPT_ENGINE_IMPL:
 149             engine_impl = 1;
 150             break;
 151         case OPT_HEX:
 152             out_bin = 0;
 153             break;
 154         case OPT_BINARY:
 155             out_bin = 1;
 156             break;
 157         case OPT_DEBUG:
 158             debug = 1;
 159             break;
 160         case OPT_FIPS_FINGERPRINT:
 161             hmac_key = "etaonrishdlcupfm";
 162             break;
 163         case OPT_HMAC:
 164             hmac_key = opt_arg();
 165             break;
 166         case OPT_MAC:
 167             mac_name = opt_arg();
 168             break;
 169         case OPT_SIGOPT:
 170             if (!sigopts)
 171                 sigopts = sk_OPENSSL_STRING_new_null();
 172             if (!sigopts || !sk_OPENSSL_STRING_push(sigopts, opt_arg()))
 173                 goto opthelp;
 174             break;
 175         case OPT_MACOPT:
 176             if (!macopts)
 177                 macopts = sk_OPENSSL_STRING_new_null();
 178             if (!macopts || !sk_OPENSSL_STRING_push(macopts, opt_arg()))
 179                 goto opthelp;
 180             break;
 181         case OPT_DIGEST:
 182             if (!opt_md(opt_unknown(), &m))
 183                 goto opthelp;
 184             md = m;
 185             break;
 186         }
 187     }
 188     argc = opt_num_rest();
 189     argv = opt_rest();
 190     if (keyfile != NULL && argc > 1) {
 191         BIO_printf(bio_err, "%s: Can only sign or verify one file.\n", prog);
 192         goto end;
 193     }
 194
 195     if (do_verify && sigfile == NULL) {
 196         BIO_printf(bio_err,
 197                    "No signature to verify: use the -signature option\n");
 198         goto end;
 199     }
 200     if (engine_impl)
 201         impl = e;
 202
 203     in = BIO_new(BIO_s_file());
 204     bmd = BIO_new(BIO_f_md());
 205     if ((in == NULL) || (bmd == NULL)) {
 206         ERR_print_errors(bio_err);
 207         goto end;
 208     }
 209
 210     if (debug) {
 211         BIO_set_callback(in, BIO_debug_callback);
 212         /* needed for windows 3.1 */
 213         BIO_set_callback_arg(in, (char *)bio_err);
 214     }
 215
 216     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 217         BIO_printf(bio_err, "Error getting password\n");
 218         goto end;
 219     }
 220
 221     if (out_bin == -1) {
 222         if (keyfile != NULL)
 223             out_bin = 1;
 224         else
 225             out_bin = 0;
 226     }
 227
 228     out = bio_open_default(outfile, 'w', out_bin ? FORMAT_BINARY : FORMAT_TEXT);
 229     if (out == NULL)
 230         goto end;
 231
 232     if ((!(mac_name == NULL) + !(keyfile == NULL) + !(hmac_key == NULL)) > 1) {
 233         BIO_printf(bio_err, "MAC and Signing key cannot both be specified\n");
 234         goto end;
 235     }
 236
 237     if (keyfile != NULL) {
 238         int type;
 239
 240         if (want_pub)
 241             sigkey = load_pubkey(keyfile, keyform, 0, NULL, e, "key file");
 242         else
 243             sigkey = load_key(keyfile, keyform, 0, passin, e, "key file");
 244         if (sigkey == NULL) {
 245             /*
 246              * load_[pub]key() has already printed an appropriate message
 247              */
 248             goto end;
 249         }
 250         type = EVP_PKEY_id(sigkey);
 251         if (type == EVP_PKEY_ED25519 || type == EVP_PKEY_ED448) {
 252             /*
 253              * We implement PureEdDSA for these which doesn't have a separate
 254              * digest, and only supports one shot.
 255              */
 256             BIO_printf(bio_err, "Key type not supported for this operation\n");
 257             goto end;
 258         }
 259     }
 260
 261     if (mac_name != NULL) {
 262         EVP_PKEY_CTX *mac_ctx = NULL;
 263         int r = 0;
 264         if (!init_gen_str(&mac_ctx, mac_name, impl, 0))
 265             goto mac_end;
 266         if (macopts != NULL) {
 267             char *macopt;
 268             for (i = 0; i < sk_OPENSSL_STRING_num(macopts); i++) {
 269                 macopt = sk_OPENSSL_STRING_value(macopts, i);
 270                 if (pkey_ctrl_string(mac_ctx, macopt) <= 0) {
 271                     BIO_printf(bio_err,
 272                                "MAC parameter error \"%s\"\n", macopt);
 273                     ERR_print_errors(bio_err);
 274                     goto mac_end;
 275                 }
 276             }
 277         }
 278         if (EVP_PKEY_keygen(mac_ctx, &sigkey) <= 0) {
 279             BIO_puts(bio_err, "Error generating key\n");
 280             ERR_print_errors(bio_err);
 281             goto mac_end;
 282         }
 283         r = 1;
 284  mac_end:
 285         EVP_PKEY_CTX_free(mac_ctx);
 286         if (r == 0)
 287             goto end;
 288     }
 289
 290     if (hmac_key != NULL) {
 291         sigkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_HMAC, impl,
 292                                               (unsigned char *)hmac_key, -1);
 293         if (sigkey == NULL)
 294             goto end;
 295     }
 296
 297     if (sigkey != NULL) {
 298         EVP_MD_CTX *mctx = NULL;
 299         EVP_PKEY_CTX *pctx = NULL;
 300         int r;
 301         if (!BIO_get_md_ctx(bmd, &mctx)) {
 302             BIO_printf(bio_err, "Error getting context\n");
 303             ERR_print_errors(bio_err);
 304             goto end;
 305         }
 306         if (do_verify)
 307             r = EVP_DigestVerifyInit(mctx, &pctx, md, impl, sigkey);
 308         else
 309             r = EVP_DigestSignInit(mctx, &pctx, md, impl, sigkey);
 310         if (!r) {
 311             BIO_printf(bio_err, "Error setting context\n");
 312             ERR_print_errors(bio_err);
 313             goto end;
 314         }
 315         if (sigopts != NULL) {
 316             char *sigopt;
 317             for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
 318                 sigopt = sk_OPENSSL_STRING_value(sigopts, i);
 319                 if (pkey_ctrl_string(pctx, sigopt) <= 0) {
 320                     BIO_printf(bio_err, "parameter error \"%s\"\n", sigopt);
 321                     ERR_print_errors(bio_err);
 322                     goto end;
 323                 }
 324             }
 325         }
 326     }
 327     /* we use md as a filter, reading from 'in' */
 328     else {
 329         EVP_MD_CTX *mctx = NULL;
 330         if (!BIO_get_md_ctx(bmd, &mctx)) {
 331             BIO_printf(bio_err, "Error getting context\n");
 332             ERR_print_errors(bio_err);
 333             goto end;
 334         }
 335         if (md == NULL)
 336             md = EVP_sha256();
 337         if (!EVP_DigestInit_ex(mctx, md, impl)) {
 338             BIO_printf(bio_err, "Error setting digest\n");
 339             ERR_print_errors(bio_err);
 340             goto end;
 341         }
 342     }
 343
 344     if (sigfile != NULL && sigkey != NULL) {
 345         BIO *sigbio = BIO_new_file(sigfile, "rb");
 346         if (sigbio == NULL) {
 347             BIO_printf(bio_err, "Error opening signature file %s\n", sigfile);
 348             ERR_print_errors(bio_err);
 349             goto end;
 350         }
 351         siglen = EVP_PKEY_size(sigkey);
 352         sigbuf = app_malloc(siglen, "signature buffer");
 353         siglen = BIO_read(sigbio, sigbuf, siglen);
 354         BIO_free(sigbio);
 355         if (siglen <= 0) {
 356             BIO_printf(bio_err, "Error reading signature file %s\n", sigfile);
 357             ERR_print_errors(bio_err);
 358             goto end;
 359         }
 360     }
 361     inp = BIO_push(bmd, in);
 362
 363     if (md == NULL) {
 364         EVP_MD_CTX *tctx;
 365         BIO_get_md_ctx(bmd, &tctx);
 366         md = EVP_MD_CTX_md(tctx);
 367     }
 368
 369     if (argc == 0) {
 370         BIO_set_fp(in, stdin, BIO_NOCLOSE);
 371         ret = do_fp(out, buf, inp, separator, out_bin, sigkey, sigbuf,
 372                     siglen, NULL, NULL, "stdin");
 373     } else {
 374         const char *md_name = NULL, *sig_name = NULL;
 375         if (!out_bin) {
 376             if (sigkey != NULL) {
 377                 const EVP_PKEY_ASN1_METHOD *ameth;
 378                 ameth = EVP_PKEY_get0_asn1(sigkey);
 379                 if (ameth)
 380                     EVP_PKEY_asn1_get0_info(NULL, NULL,
 381                                             NULL, NULL, &sig_name, ameth);
 382             }
 383             if (md != NULL)
 384                 md_name = EVP_MD_name(md);
 385         }
 386         ret = 0;
 387         for (i = 0; i < argc; i++) {
 388             int r;
 389             if (BIO_read_filename(in, argv[i]) <= 0) {
 390                 perror(argv[i]);
 391                 ret++;
 392                 continue;
 393             } else {
 394                 r = do_fp(out, buf, inp, separator, out_bin, sigkey, sigbuf,
 395                           siglen, sig_name, md_name, argv[i]);
 396             }
 397             if (r)
 398                 ret = r;
 399             (void)BIO_reset(bmd);
 400         }
 401     }
 402  end:
 403     OPENSSL_clear_free(buf, BUFSIZE);
 404     BIO_free(in);
 405     OPENSSL_free(passin);
 406     BIO_free_all(out);
 407     EVP_PKEY_free(sigkey);
 408     sk_OPENSSL_STRING_free(sigopts);
 409     sk_OPENSSL_STRING_free(macopts);
 410     OPENSSL_free(sigbuf);
 411     BIO_free(bmd);
 412     release_engine(e);
 413     return ret;
 414 }
 415
 416 int do_fp(BIO *out, unsigned char *buf, BIO *bp, int sep, int binout,
 417           EVP_PKEY *key, unsigned char *sigin, int siglen,
 418           const char *sig_name, const char *md_name,
 419           const char *file)
 420 {
 421     size_t len;
 422     int i;
 423
 424     for (;;) {
 425         i = BIO_read(bp, (char *)buf, BUFSIZE);
 426         if (i < 0) {
 427             BIO_printf(bio_err, "Read Error in %s\n", file);
 428             ERR_print_errors(bio_err);
 429             return 1;
 430         }
 431         if (i == 0)
 432             break;
 433     }
 434     if (sigin != NULL) {
 435         EVP_MD_CTX *ctx;
 436         BIO_get_md_ctx(bp, &ctx);
 437         i = EVP_DigestVerifyFinal(ctx, sigin, (unsigned int)siglen);
 438         if (i > 0) {
 439             BIO_printf(out, "Verified OK\n");
 440         } else if (i == 0) {
 441             BIO_printf(out, "Verification Failure\n");
 442             return 1;
 443         } else {
 444             BIO_printf(bio_err, "Error Verifying Data\n");
 445             ERR_print_errors(bio_err);
 446             return 1;
 447         }
 448         return 0;
 449     }
 450     if (key != NULL) {
 451         EVP_MD_CTX *ctx;
 452         BIO_get_md_ctx(bp, &ctx);
 453         len = BUFSIZE;
 454         if (!EVP_DigestSignFinal(ctx, buf, &len)) {
 455             BIO_printf(bio_err, "Error Signing Data\n");
 456             ERR_print_errors(bio_err);
 457             return 1;
 458         }
 459     } else {
 460         len = BIO_gets(bp, (char *)buf, BUFSIZE);
 461         if ((int)len < 0) {
 462             ERR_print_errors(bio_err);
 463             return 1;
 464         }
 465     }
 466
 467     if (binout) {
 468         BIO_write(out, buf, len);
 469     } else if (sep == 2) {
 470         for (i = 0; i < (int)len; i++)
 471             BIO_printf(out, "%02x", buf[i]);
 472         BIO_printf(out, " *%s\n", file);
 473     } else {
 474         if (sig_name != NULL) {
 475             BIO_puts(out, sig_name);
 476             if (md_name != NULL)
 477                 BIO_printf(out, "-%s", md_name);
 478             BIO_printf(out, "(%s)= ", file);
 479         } else if (md_name != NULL) {
 480             BIO_printf(out, "%s(%s)= ", md_name, file);
 481         } else {
 482             BIO_printf(out, "(%s)= ", file);
 483         }
 484         for (i = 0; i < (int)len; i++) {
 485             if (sep && (i != 0))
 486                 BIO_printf(out, ":");
 487             BIO_printf(out, "%02x", buf[i]);
 488         }
 489         BIO_printf(out, "\n");
 490     }
 491     return 0;
 492 }