apps/dgst.c

   1 /*
   2  * Copyright 1995-2019 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 <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 #include <ctype.h>
  23
  24 #undef BUFSIZE
  25 #define BUFSIZE 1024*8
  26
  27 int do_fp(BIO *out, unsigned char *buf, BIO *bp, int sep, int binout,
  28           EVP_PKEY *key, unsigned char *sigin, int siglen,
  29           const char *sig_name, const char *md_name,
  30           const char *file);
  31 static void show_digests(const OBJ_NAME *name, void *bio_);
  32
  33 struct doall_dgst_digests {
  34     BIO *bio;
  35     int n;
  36 };
  37
  38 typedef enum OPTION_choice {
  39     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, OPT_LIST,
  40     OPT_C, OPT_R, OPT_OUT, OPT_SIGN, OPT_PASSIN, OPT_VERIFY,
  41     OPT_PRVERIFY, OPT_SIGNATURE, OPT_KEYFORM, OPT_ENGINE, OPT_ENGINE_IMPL,
  42     OPT_HEX, OPT_BINARY, OPT_DEBUG, OPT_FIPS_FINGERPRINT,
  43     OPT_HMAC, OPT_MAC, OPT_SIGOPT, OPT_MACOPT,
  44     OPT_DIGEST,
  45     OPT_R_ENUM, OPT_PROV_ENUM
  46 } OPTION_CHOICE;
  47
  48 const OPTIONS dgst_options[] = {
  49     {OPT_HELP_STR, 1, '-', "Usage: %s [options] [file...]\n"},
  50
  51     OPT_SECTION("General"),
  52     {"help", OPT_HELP, '-', "Display this summary"},
  53     {"list", OPT_LIST, '-', "List digests"},
  54 #ifndef OPENSSL_NO_ENGINE
  55     {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
  56     {"engine_impl", OPT_ENGINE_IMPL, '-',
  57      "Also use engine given by -engine for digest operations"},
  58 #endif
  59     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  60
  61     OPT_SECTION("Output"),
  62     {"c", OPT_C, '-', "Print the digest with separating colons"},
  63     {"r", OPT_R, '-', "Print the digest in coreutils format"},
  64     {"out", OPT_OUT, '>', "Output to filename rather than stdout"},
  65     {"keyform", OPT_KEYFORM, 'f', "Key file format (PEM or ENGINE)"},
  66     {"hex", OPT_HEX, '-', "Print as hex dump"},
  67     {"binary", OPT_BINARY, '-', "Print in binary form"},
  68     {"d", OPT_DEBUG, '-', "Print debug info"},
  69     {"debug", OPT_DEBUG, '-', "Print debug info"},
  70
  71     OPT_SECTION("Signing"),
  72     {"sign", OPT_SIGN, 's', "Sign digest using private key"},
  73     {"verify", OPT_VERIFY, 's', "Verify a signature using public key"},
  74     {"prverify", OPT_PRVERIFY, 's', "Verify a signature using private key"},
  75     {"sigopt", OPT_SIGOPT, 's', "Signature parameter in n:v form"},
  76     {"signature", OPT_SIGNATURE, '<', "File with signature to verify"},
  77     {"hmac", OPT_HMAC, 's', "Create hashed MAC with key"},
  78     {"mac", OPT_MAC, 's', "Create MAC (not necessarily HMAC)"},
  79     {"macopt", OPT_MACOPT, 's', "MAC algorithm parameters in n:v form or key"},
  80     {"", OPT_DIGEST, '-', "Any supported digest"},
  81     {"fips-fingerprint", OPT_FIPS_FINGERPRINT, '-',
  82      "Compute HMAC with the key used in OpenSSL-FIPS fingerprint"},
  83
  84     OPT_R_OPTIONS,
  85     OPT_PROV_OPTIONS,
  86
  87     OPT_PARAMETERS(),
  88     {"file", 0, 0, "Files to digest (optional; default is stdin)"},
  89     {NULL}
  90 };
  91
  92 int dgst_main(int argc, char **argv)
  93 {
  94     BIO *in = NULL, *inp, *bmd = NULL, *out = NULL;
  95     ENGINE *e = NULL, *impl = NULL;
  96     EVP_PKEY *sigkey = NULL;
  97     STACK_OF(OPENSSL_STRING) *sigopts = NULL, *macopts = NULL;
  98     char *hmac_key = NULL;
  99     char *mac_name = NULL;
 100     char *passinarg = NULL, *passin = NULL;
 101     const EVP_MD *md = NULL, *m;
 102     const char *outfile = NULL, *keyfile = NULL, *prog = NULL;
 103     const char *sigfile = NULL;
 104     const char *md_name = NULL;
 105     OPTION_CHOICE o;
 106     int separator = 0, debug = 0, keyform = FORMAT_PEM, siglen = 0;
 107     int i, ret = 1, out_bin = -1, want_pub = 0, do_verify = 0;
 108     unsigned char *buf = NULL, *sigbuf = NULL;
 109     int engine_impl = 0;
 110     struct doall_dgst_digests dec;
 111
 112     prog = opt_progname(argv[0]);
 113     buf = app_malloc(BUFSIZE, "I/O buffer");
 114     md = EVP_get_digestbyname(prog);
 115
 116     prog = opt_init(argc, argv, dgst_options);
 117     while ((o = opt_next()) != OPT_EOF) {
 118         switch (o) {
 119         case OPT_EOF:
 120         case OPT_ERR:
 121  opthelp:
 122             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 123             goto end;
 124         case OPT_HELP:
 125             opt_help(dgst_options);
 126             ret = 0;
 127             goto end;
 128         case OPT_LIST:
 129             BIO_printf(bio_out, "Supported digests:\n");
 130             dec.bio = bio_out;
 131             dec.n = 0;
 132             OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_MD_METH,
 133                                    show_digests, &dec);
 134             BIO_printf(bio_out, "\n");
 135             ret = 0;
 136             goto end;
 137         case OPT_C:
 138             separator = 1;
 139             break;
 140         case OPT_R:
 141             separator = 2;
 142             break;
 143         case OPT_R_CASES:
 144             if (!opt_rand(o))
 145                 goto end;
 146             break;
 147         case OPT_OUT:
 148             outfile = opt_arg();
 149             break;
 150         case OPT_SIGN:
 151             keyfile = opt_arg();
 152             break;
 153         case OPT_PASSIN:
 154             passinarg = opt_arg();
 155             break;
 156         case OPT_VERIFY:
 157             keyfile = opt_arg();
 158             want_pub = do_verify = 1;
 159             break;
 160         case OPT_PRVERIFY:
 161             keyfile = opt_arg();
 162             do_verify = 1;
 163             break;
 164         case OPT_SIGNATURE:
 165             sigfile = opt_arg();
 166             break;
 167         case OPT_KEYFORM:
 168             if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyform))
 169                 goto opthelp;
 170             break;
 171         case OPT_ENGINE:
 172             e = setup_engine(opt_arg(), 0);
 173             break;
 174         case OPT_ENGINE_IMPL:
 175             engine_impl = 1;
 176             break;
 177         case OPT_HEX:
 178             out_bin = 0;
 179             break;
 180         case OPT_BINARY:
 181             out_bin = 1;
 182             break;
 183         case OPT_DEBUG:
 184             debug = 1;
 185             break;
 186         case OPT_FIPS_FINGERPRINT:
 187             hmac_key = "etaonrishdlcupfm";
 188             break;
 189         case OPT_HMAC:
 190             hmac_key = opt_arg();
 191             break;
 192         case OPT_MAC:
 193             mac_name = opt_arg();
 194             break;
 195         case OPT_SIGOPT:
 196             if (!sigopts)
 197                 sigopts = sk_OPENSSL_STRING_new_null();
 198             if (!sigopts || !sk_OPENSSL_STRING_push(sigopts, opt_arg()))
 199                 goto opthelp;
 200             break;
 201         case OPT_MACOPT:
 202             if (!macopts)
 203                 macopts = sk_OPENSSL_STRING_new_null();
 204             if (!macopts || !sk_OPENSSL_STRING_push(macopts, opt_arg()))
 205                 goto opthelp;
 206             break;
 207         case OPT_DIGEST:
 208             if (!opt_md(opt_unknown(), &m))
 209                 goto opthelp;
 210             md = m;
 211             break;
 212         case OPT_PROV_CASES:
 213             if (!opt_provider(o))
 214                 goto end;
 215             break;
 216         }
 217     }
 218     argc = opt_num_rest();
 219     argv = opt_rest();
 220     if (keyfile != NULL && argc > 1) {
 221         BIO_printf(bio_err, "%s: Can only sign or verify one file.\n", prog);
 222         goto end;
 223     }
 224
 225     if (do_verify && sigfile == NULL) {
 226         BIO_printf(bio_err,
 227                    "No signature to verify: use the -signature option\n");
 228         goto end;
 229     }
 230     if (engine_impl)
 231         impl = e;
 232
 233     in = BIO_new(BIO_s_file());
 234     bmd = BIO_new(BIO_f_md());
 235     if ((in == NULL) || (bmd == NULL)) {
 236         ERR_print_errors(bio_err);
 237         goto end;
 238     }
 239
 240     if (debug) {
 241         BIO_set_callback(in, BIO_debug_callback);
 242         /* needed for windows 3.1 */
 243         BIO_set_callback_arg(in, (char *)bio_err);
 244     }
 245
 246     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 247         BIO_printf(bio_err, "Error getting password\n");
 248         goto end;
 249     }
 250
 251     if (out_bin == -1) {
 252         if (keyfile != NULL)
 253             out_bin = 1;
 254         else
 255             out_bin = 0;
 256     }
 257
 258     out = bio_open_default(outfile, 'w', out_bin ? FORMAT_BINARY : FORMAT_TEXT);
 259     if (out == NULL)
 260         goto end;
 261
 262     if ((!(mac_name == NULL) + !(keyfile == NULL) + !(hmac_key == NULL)) > 1) {
 263         BIO_printf(bio_err, "MAC and Signing key cannot both be specified\n");
 264         goto end;
 265     }
 266
 267     if (keyfile != NULL) {
 268         int type;
 269
 270         if (want_pub)
 271             sigkey = load_pubkey(keyfile, keyform, 0, NULL, e, "key file");
 272         else
 273             sigkey = load_key(keyfile, keyform, 0, passin, e, "key file");
 274         if (sigkey == NULL) {
 275             /*
 276              * load_[pub]key() has already printed an appropriate message
 277              */
 278             goto end;
 279         }
 280         type = EVP_PKEY_id(sigkey);
 281         if (type == EVP_PKEY_ED25519 || type == EVP_PKEY_ED448) {
 282             /*
 283              * We implement PureEdDSA for these which doesn't have a separate
 284              * digest, and only supports one shot.
 285              */
 286             BIO_printf(bio_err, "Key type not supported for this operation\n");
 287             goto end;
 288         }
 289     }
 290
 291     if (mac_name != NULL) {
 292         EVP_PKEY_CTX *mac_ctx = NULL;
 293         int r = 0;
 294         if (!init_gen_str(&mac_ctx, mac_name, impl, 0))
 295             goto mac_end;
 296         if (macopts != NULL) {
 297             char *macopt;
 298             for (i = 0; i < sk_OPENSSL_STRING_num(macopts); i++) {
 299                 macopt = sk_OPENSSL_STRING_value(macopts, i);
 300                 if (pkey_ctrl_string(mac_ctx, macopt) <= 0) {
 301                     BIO_printf(bio_err,
 302                                "MAC parameter error \"%s\"\n", macopt);
 303                     ERR_print_errors(bio_err);
 304                     goto mac_end;
 305                 }
 306             }
 307         }
 308         if (EVP_PKEY_keygen(mac_ctx, &sigkey) <= 0) {
 309             BIO_puts(bio_err, "Error generating key\n");
 310             ERR_print_errors(bio_err);
 311             goto mac_end;
 312         }
 313         r = 1;
 314  mac_end:
 315         EVP_PKEY_CTX_free(mac_ctx);
 316         if (r == 0)
 317             goto end;
 318     }
 319
 320     if (hmac_key != NULL) {
 321         sigkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_HMAC, impl,
 322                                               (unsigned char *)hmac_key, -1);
 323         if (sigkey == NULL)
 324             goto end;
 325     }
 326
 327     if (sigkey != NULL) {
 328         EVP_MD_CTX *mctx = NULL;
 329         EVP_PKEY_CTX *pctx = NULL;
 330         int r;
 331         if (!BIO_get_md_ctx(bmd, &mctx)) {
 332             BIO_printf(bio_err, "Error getting context\n");
 333             ERR_print_errors(bio_err);
 334             goto end;
 335         }
 336         if (do_verify)
 337             r = EVP_DigestVerifyInit(mctx, &pctx, md, impl, sigkey);
 338         else
 339             r = EVP_DigestSignInit(mctx, &pctx, md, impl, sigkey);
 340         if (!r) {
 341             BIO_printf(bio_err, "Error setting context\n");
 342             ERR_print_errors(bio_err);
 343             goto end;
 344         }
 345         if (sigopts != NULL) {
 346             char *sigopt;
 347             for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
 348                 sigopt = sk_OPENSSL_STRING_value(sigopts, i);
 349                 if (pkey_ctrl_string(pctx, sigopt) <= 0) {
 350                     BIO_printf(bio_err, "parameter error \"%s\"\n", sigopt);
 351                     ERR_print_errors(bio_err);
 352                     goto end;
 353                 }
 354             }
 355         }
 356     }
 357     /* we use md as a filter, reading from 'in' */
 358     else {
 359         EVP_MD_CTX *mctx = NULL;
 360         if (!BIO_get_md_ctx(bmd, &mctx)) {
 361             BIO_printf(bio_err, "Error getting context\n");
 362             ERR_print_errors(bio_err);
 363             goto end;
 364         }
 365         if (md == NULL)
 366             md = EVP_sha256();
 367         if (!EVP_DigestInit_ex(mctx, md, impl)) {
 368             BIO_printf(bio_err, "Error setting digest\n");
 369             ERR_print_errors(bio_err);
 370             goto end;
 371         }
 372     }
 373
 374     if (sigfile != NULL && sigkey != NULL) {
 375         BIO *sigbio = BIO_new_file(sigfile, "rb");
 376         if (sigbio == NULL) {
 377             BIO_printf(bio_err, "Error opening signature file %s\n", sigfile);
 378             ERR_print_errors(bio_err);
 379             goto end;
 380         }
 381         siglen = EVP_PKEY_size(sigkey);
 382         sigbuf = app_malloc(siglen, "signature buffer");
 383         siglen = BIO_read(sigbio, sigbuf, siglen);
 384         BIO_free(sigbio);
 385         if (siglen <= 0) {
 386             BIO_printf(bio_err, "Error reading signature file %s\n", sigfile);
 387             ERR_print_errors(bio_err);
 388             goto end;
 389         }
 390     }
 391     inp = BIO_push(bmd, in);
 392
 393     if (md == NULL) {
 394         EVP_MD_CTX *tctx;
 395         BIO_get_md_ctx(bmd, &tctx);
 396         md = EVP_MD_CTX_md(tctx);
 397     }
 398     if (md != NULL)
 399         md_name = EVP_MD_name(md);
 400
 401     if (argc == 0) {
 402         BIO_set_fp(in, stdin, BIO_NOCLOSE);
 403         ret = do_fp(out, buf, inp, separator, out_bin, sigkey, sigbuf,
 404                     siglen, NULL, md_name, "stdin");
 405     } else {
 406         const char *sig_name = NULL;
 407         if (!out_bin) {
 408             if (sigkey != NULL) {
 409                 const EVP_PKEY_ASN1_METHOD *ameth;
 410                 ameth = EVP_PKEY_get0_asn1(sigkey);
 411                 if (ameth)
 412                     EVP_PKEY_asn1_get0_info(NULL, NULL,
 413                                             NULL, NULL, &sig_name, ameth);
 414             }
 415         }
 416         ret = 0;
 417         for (i = 0; i < argc; i++) {
 418             int r;
 419             if (BIO_read_filename(in, argv[i]) <= 0) {
 420                 perror(argv[i]);
 421                 ret++;
 422                 continue;
 423             } else {
 424                 r = do_fp(out, buf, inp, separator, out_bin, sigkey, sigbuf,
 425                           siglen, sig_name, md_name, argv[i]);
 426             }
 427             if (r)
 428                 ret = r;
 429             (void)BIO_reset(bmd);
 430         }
 431     }
 432  end:
 433     OPENSSL_clear_free(buf, BUFSIZE);
 434     BIO_free(in);
 435     OPENSSL_free(passin);
 436     BIO_free_all(out);
 437     EVP_PKEY_free(sigkey);
 438     sk_OPENSSL_STRING_free(sigopts);
 439     sk_OPENSSL_STRING_free(macopts);
 440     OPENSSL_free(sigbuf);
 441     BIO_free(bmd);
 442     release_engine(e);
 443     return ret;
 444 }
 445
 446 static void show_digests(const OBJ_NAME *name, void *arg)
 447 {
 448     struct doall_dgst_digests *dec = (struct doall_dgst_digests *)arg;
 449     const EVP_MD *md = NULL;
 450
 451     /* Filter out signed digests (a.k.a signature algorithms) */
 452     if (strstr(name->name, "rsa") != NULL || strstr(name->name, "RSA") != NULL)
 453         return;
 454
 455     if (!islower((unsigned char)*name->name))
 456         return;
 457
 458     /* Filter out message digests that we cannot use */
 459     md = EVP_get_digestbyname(name->name);
 460     if (md == NULL)
 461         return;
 462
 463     BIO_printf(dec->bio, "-%-25s", name->name);
 464     if (++dec->n == 3) {
 465         BIO_printf(dec->bio, "\n");
 466         dec->n = 0;
 467     } else {
 468         BIO_printf(dec->bio, " ");
 469     }
 470 }
 471
 472 /*
 473  * The newline_escape_filename function performs newline escaping for any
 474  * filename that contains a newline.  This function also takes a pointer
 475  * to backslash. The backslash pointer is a flag to indicating whether a newline
 476  * is present in the filename.  If a newline is present, the backslash flag is
 477  * set and the output format will contain a backslash at the beginning of the
 478  * digest output. This output format is to replicate the output format found
 479  * in the '*sum' checksum programs. This aims to preserve backward
 480  * compatibility.
 481  */
 482 static const char *newline_escape_filename(const char *file, int * backslash)
 483 {
 484     size_t i, e = 0, length = strlen(file), newline_count = 0, mem_len = 0;
 485     char *file_cpy = NULL;
 486
 487     for (i = 0; i < length; i++)
 488         if (file[i] == '\n')
 489             newline_count++;
 490
 491     mem_len = length + newline_count + 1;
 492     file_cpy = app_malloc(mem_len, file);
 493     i = 0;
 494
 495     while(e < length) {
 496         const char c = file[e];
 497         if (c == '\n') {
 498             file_cpy[i++] = '\\';
 499             file_cpy[i++] = 'n';
 500             *backslash = 1;
 501         } else {
 502             file_cpy[i++] = c;
 503         }
 504         e++;
 505     }
 506     file_cpy[i] = '\0';
 507     return (const char*)file_cpy;
 508 }
 509
 510
 511 int do_fp(BIO *out, unsigned char *buf, BIO *bp, int sep, int binout,
 512           EVP_PKEY *key, unsigned char *sigin, int siglen,
 513           const char *sig_name, const char *md_name,
 514           const char *file)
 515 {
 516     size_t len = BUFSIZE;
 517     int i, backslash = 0, ret = 1;
 518     unsigned char *sigbuf = NULL;
 519
 520     while (BIO_pending(bp) || !BIO_eof(bp)) {
 521         i = BIO_read(bp, (char *)buf, BUFSIZE);
 522         if (i < 0) {
 523             BIO_printf(bio_err, "Read Error in %s\n", file);
 524             ERR_print_errors(bio_err);
 525             goto end;
 526         }
 527         if (i == 0)
 528             break;
 529     }
 530     if (sigin != NULL) {
 531         EVP_MD_CTX *ctx;
 532         BIO_get_md_ctx(bp, &ctx);
 533         i = EVP_DigestVerifyFinal(ctx, sigin, (unsigned int)siglen);
 534         if (i > 0) {
 535             BIO_printf(out, "Verified OK\n");
 536         } else if (i == 0) {
 537             BIO_printf(out, "Verification Failure\n");
 538             goto end;
 539         } else {
 540             BIO_printf(bio_err, "Error Verifying Data\n");
 541             ERR_print_errors(bio_err);
 542             goto end;
 543         }
 544         ret = 0;
 545         goto end;
 546     }
 547     if (key != NULL) {
 548         EVP_MD_CTX *ctx;
 549         size_t tmplen;
 550
 551         BIO_get_md_ctx(bp, &ctx);
 552         if (!EVP_DigestSignFinal(ctx, NULL, &tmplen)) {
 553             BIO_printf(bio_err, "Error Signing Data\n");
 554             ERR_print_errors(bio_err);
 555             goto end;
 556         }
 557         if (tmplen > BUFSIZE) {
 558             len = tmplen;
 559             sigbuf = app_malloc(len, "Signature buffer");
 560             buf = sigbuf;
 561         }
 562         if (!EVP_DigestSignFinal(ctx, buf, &len)) {
 563             BIO_printf(bio_err, "Error Signing Data\n");
 564             ERR_print_errors(bio_err);
 565             goto end;
 566         }
 567     } else {
 568         len = BIO_gets(bp, (char *)buf, BUFSIZE);
 569         if ((int)len < 0) {
 570             ERR_print_errors(bio_err);
 571             goto end;
 572         }
 573     }
 574
 575     if (binout) {
 576         BIO_write(out, buf, len);
 577     } else if (sep == 2) {
 578         file = newline_escape_filename(file, &backslash);
 579
 580         if (backslash == 1)
 581             BIO_puts(out, "\\");
 582
 583         for (i = 0; i < (int)len; i++)
 584             BIO_printf(out, "%02x", buf[i]);
 585
 586         BIO_printf(out, " *%s\n", file);
 587         OPENSSL_free((char *)file);
 588     } else {
 589         if (sig_name != NULL) {
 590             BIO_puts(out, sig_name);
 591             if (md_name != NULL)
 592                 BIO_printf(out, "-%s", md_name);
 593             BIO_printf(out, "(%s)= ", file);
 594         } else if (md_name != NULL) {
 595             BIO_printf(out, "%s(%s)= ", md_name, file);
 596         } else {
 597             BIO_printf(out, "(%s)= ", file);
 598         }
 599         for (i = 0; i < (int)len; i++) {
 600             if (sep && (i != 0))
 601                 BIO_printf(out, ":");
 602             BIO_printf(out, "%02x", buf[i]);
 603         }
 604         BIO_printf(out, "\n");
 605     }
 606
 607     ret = 0;
 608  end:
 609     if (sigbuf != NULL)
 610         OPENSSL_clear_free(sigbuf, len);
 611
 612     return ret;
 613 }