apps/dgst.c

   1 /*
   2  * Copyright 1995-2016 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 <openssl/bio.h>
  15 #include <openssl/err.h>
  16 #include <openssl/evp.h>
  17 #include <openssl/objects.h>
  18 #include <openssl/x509.h>
  19 #include <openssl/pem.h>
  20 #include <openssl/hmac.h>
  21
  22 #undef BUFSIZE
  23 #define BUFSIZE 1024*8
  24
  25 int do_fp(BIO *out, unsigned char *buf, BIO *bp, int sep, int binout,
  26           EVP_PKEY *key, unsigned char *sigin, int siglen,
  27           const char *sig_name, const char *md_name,
  28           const char *file);
  29
  30 typedef enum OPTION_choice {
  31     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  32     OPT_C, OPT_R, OPT_RAND, OPT_OUT, OPT_SIGN, OPT_PASSIN, OPT_VERIFY,
  33     OPT_PRVERIFY, OPT_SIGNATURE, OPT_KEYFORM, OPT_ENGINE, OPT_ENGINE_IMPL,
  34     OPT_HEX, OPT_BINARY, OPT_DEBUG, OPT_FIPS_FINGERPRINT,
  35     OPT_HMAC, OPT_MAC, OPT_SIGOPT, OPT_MACOPT,
  36     OPT_DIGEST
  37 } OPTION_CHOICE;
  38
  39 OPTIONS dgst_options[] = {
  40     {OPT_HELP_STR, 1, '-', "Usage: %s [options] [file...]\n"},
  41     {OPT_HELP_STR, 1, '-',
  42         "  file... files to digest (default is stdin)\n"},
  43     {"help", OPT_HELP, '-', "Display this summary"},
  44     {"c", OPT_C, '-', "Print the digest with separating colons"},
  45     {"r", OPT_R, '-', "Print the digest in coreutils format"},
  46     {"rand", OPT_RAND, 's',
  47      "Use file(s) containing random data to seed RNG or an EGD sock"},
  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 #ifndef OPENSSL_NO_ENGINE
  69     {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
  70     {"engine_impl", OPT_ENGINE_IMPL, '-',
  71      "Also use engine given by -engine for digest operations"},
  72 #endif
  73     {NULL}
  74 };
  75
  76 int dgst_main(int argc, char **argv)
  77 {
  78     BIO *in = NULL, *inp, *bmd = NULL, *out = NULL;
  79     ENGINE *e = NULL, *impl = NULL;
  80     EVP_PKEY *sigkey = NULL;
  81     STACK_OF(OPENSSL_STRING) *sigopts = NULL, *macopts = NULL;
  82     char *hmac_key = NULL;
  83     char *mac_name = NULL;
  84     char *passinarg = NULL, *passin = NULL;
  85     const EVP_MD *md = NULL, *m;
  86     const char *outfile = NULL, *keyfile = NULL, *prog = NULL;
  87     const char *sigfile = NULL, *randfile = NULL;
  88     OPTION_CHOICE o;
  89     int separator = 0, debug = 0, keyform = FORMAT_PEM, siglen = 0;
  90     int i, ret = 1, out_bin = -1, want_pub = 0, do_verify = 0;
  91     unsigned char *buf = NULL, *sigbuf = NULL;
  92     int engine_impl = 0;
  93
  94     prog = opt_progname(argv[0]);
  95     buf = app_malloc(BUFSIZE, "I/O buffer");
  96     md = EVP_get_digestbyname(prog);
  97
  98     prog = opt_init(argc, argv, dgst_options);
  99     while ((o = opt_next()) != OPT_EOF) {
 100         switch (o) {
 101         case OPT_EOF:
 102         case OPT_ERR:
 103  opthelp:
 104             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 105             goto end;
 106         case OPT_HELP:
 107             opt_help(dgst_options);
 108             ret = 0;
 109             goto end;
 110         case OPT_C:
 111             separator = 1;
 112             break;
 113         case OPT_R:
 114             separator = 2;
 115             break;
 116         case OPT_RAND:
 117             randfile = opt_arg();
 118             break;
 119         case OPT_OUT:
 120             outfile = opt_arg();
 121             break;
 122         case OPT_SIGN:
 123             keyfile = opt_arg();
 124             break;
 125         case OPT_PASSIN:
 126             passinarg = opt_arg();
 127             break;
 128         case OPT_VERIFY:
 129             keyfile = opt_arg();
 130             want_pub = do_verify = 1;
 131             break;
 132         case OPT_PRVERIFY:
 133             keyfile = opt_arg();
 134             do_verify = 1;
 135             break;
 136         case OPT_SIGNATURE:
 137             sigfile = opt_arg();
 138             break;
 139         case OPT_KEYFORM:
 140             if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyform))
 141                 goto opthelp;
 142             break;
 143         case OPT_ENGINE:
 144             e = setup_engine(opt_arg(), 0);
 145             break;
 146         case OPT_ENGINE_IMPL:
 147             engine_impl = 1;
 148             break;
 149         case OPT_HEX:
 150             out_bin = 0;
 151             break;
 152         case OPT_BINARY:
 153             out_bin = 1;
 154             break;
 155         case OPT_DEBUG:
 156             debug = 1;
 157             break;
 158         case OPT_FIPS_FINGERPRINT:
 159             hmac_key = "etaonrishdlcupfm";
 160             break;
 161         case OPT_HMAC:
 162             hmac_key = opt_arg();
 163             break;
 164         case OPT_MAC:
 165             mac_name = opt_arg();
 166             break;
 167         case OPT_SIGOPT:
 168             if (!sigopts)
 169                 sigopts = sk_OPENSSL_STRING_new_null();
 170             if (!sigopts || !sk_OPENSSL_STRING_push(sigopts, opt_arg()))
 171                 goto opthelp;
 172             break;
 173         case OPT_MACOPT:
 174             if (!macopts)
 175                 macopts = sk_OPENSSL_STRING_new_null();
 176             if (!macopts || !sk_OPENSSL_STRING_push(macopts, opt_arg()))
 177                 goto opthelp;
 178             break;
 179         case OPT_DIGEST:
 180             if (!opt_md(opt_unknown(), &m))
 181                 goto opthelp;
 182             md = m;
 183             break;
 184         }
 185     }
 186     argc = opt_num_rest();
 187     argv = opt_rest();
 188
 189     if (do_verify && !sigfile) {
 190         BIO_printf(bio_err,
 191                    "No signature to verify: use the -signature option\n");
 192         goto end;
 193     }
 194     if (engine_impl)
 195         impl = e;
 196
 197     in = BIO_new(BIO_s_file());
 198     bmd = BIO_new(BIO_f_md());
 199     if ((in == NULL) || (bmd == NULL)) {
 200         ERR_print_errors(bio_err);
 201         goto end;
 202     }
 203
 204     if (debug) {
 205         BIO_set_callback(in, BIO_debug_callback);
 206         /* needed for windows 3.1 */
 207         BIO_set_callback_arg(in, (char *)bio_err);
 208     }
 209
 210     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 211         BIO_printf(bio_err, "Error getting password\n");
 212         goto end;
 213     }
 214
 215     if (out_bin == -1) {
 216         if (keyfile)
 217             out_bin = 1;
 218         else
 219             out_bin = 0;
 220     }
 221
 222     if (randfile)
 223         app_RAND_load_file(randfile, 0);
 224
 225     out = bio_open_default(outfile, 'w', out_bin ? FORMAT_BINARY : FORMAT_TEXT);
 226     if (out == NULL)
 227         goto end;
 228
 229     if ((! !mac_name + ! !keyfile + ! !hmac_key) > 1) {
 230         BIO_printf(bio_err, "MAC and Signing key cannot both be specified\n");
 231         goto end;
 232     }
 233
 234     if (keyfile) {
 235         if (want_pub)
 236             sigkey = load_pubkey(keyfile, keyform, 0, NULL, e, "key file");
 237         else
 238             sigkey = load_key(keyfile, keyform, 0, passin, e, "key file");
 239         if (!sigkey) {
 240             /*
 241              * load_[pub]key() has already printed an appropriate message
 242              */
 243             goto end;
 244         }
 245     }
 246
 247     if (mac_name) {
 248         EVP_PKEY_CTX *mac_ctx = NULL;
 249         int r = 0;
 250         if (!init_gen_str(&mac_ctx, mac_name, impl, 0))
 251             goto mac_end;
 252         if (macopts) {
 253             char *macopt;
 254             for (i = 0; i < sk_OPENSSL_STRING_num(macopts); i++) {
 255                 macopt = sk_OPENSSL_STRING_value(macopts, i);
 256                 if (pkey_ctrl_string(mac_ctx, macopt) <= 0) {
 257                     BIO_printf(bio_err,
 258                                "MAC parameter error \"%s\"\n", macopt);
 259                     ERR_print_errors(bio_err);
 260                     goto mac_end;
 261                 }
 262             }
 263         }
 264         if (EVP_PKEY_keygen(mac_ctx, &sigkey) <= 0) {
 265             BIO_puts(bio_err, "Error generating key\n");
 266             ERR_print_errors(bio_err);
 267             goto mac_end;
 268         }
 269         r = 1;
 270  mac_end:
 271         EVP_PKEY_CTX_free(mac_ctx);
 272         if (r == 0)
 273             goto end;
 274     }
 275
 276     if (hmac_key) {
 277         sigkey = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, impl,
 278                                       (unsigned char *)hmac_key, -1);
 279         if (!sigkey)
 280             goto end;
 281     }
 282
 283     if (sigkey) {
 284         EVP_MD_CTX *mctx = NULL;
 285         EVP_PKEY_CTX *pctx = NULL;
 286         int r;
 287         if (!BIO_get_md_ctx(bmd, &mctx)) {
 288             BIO_printf(bio_err, "Error getting context\n");
 289             ERR_print_errors(bio_err);
 290             goto end;
 291         }
 292         if (do_verify)
 293             r = EVP_DigestVerifyInit(mctx, &pctx, md, impl, sigkey);
 294         else
 295             r = EVP_DigestSignInit(mctx, &pctx, md, impl, sigkey);
 296         if (!r) {
 297             BIO_printf(bio_err, "Error setting context\n");
 298             ERR_print_errors(bio_err);
 299             goto end;
 300         }
 301         if (sigopts) {
 302             char *sigopt;
 303             for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
 304                 sigopt = sk_OPENSSL_STRING_value(sigopts, i);
 305                 if (pkey_ctrl_string(pctx, sigopt) <= 0) {
 306                     BIO_printf(bio_err, "parameter error \"%s\"\n", sigopt);
 307                     ERR_print_errors(bio_err);
 308                     goto end;
 309                 }
 310             }
 311         }
 312     }
 313     /* we use md as a filter, reading from 'in' */
 314     else {
 315         EVP_MD_CTX *mctx = NULL;
 316         if (!BIO_get_md_ctx(bmd, &mctx)) {
 317             BIO_printf(bio_err, "Error getting context\n");
 318             ERR_print_errors(bio_err);
 319             goto end;
 320         }
 321         if (md == NULL)
 322             md = EVP_sha256();
 323         if (!EVP_DigestInit_ex(mctx, md, impl)) {
 324             BIO_printf(bio_err, "Error setting digest\n");
 325             ERR_print_errors(bio_err);
 326             goto end;
 327         }
 328     }
 329
 330     if (sigfile && sigkey) {
 331         BIO *sigbio = BIO_new_file(sigfile, "rb");
 332         if (!sigbio) {
 333             BIO_printf(bio_err, "Error opening signature file %s\n", sigfile);
 334             ERR_print_errors(bio_err);
 335             goto end;
 336         }
 337         siglen = EVP_PKEY_size(sigkey);
 338         sigbuf = app_malloc(siglen, "signature buffer");
 339         siglen = BIO_read(sigbio, sigbuf, siglen);
 340         BIO_free(sigbio);
 341         if (siglen <= 0) {
 342             BIO_printf(bio_err, "Error reading signature file %s\n", sigfile);
 343             ERR_print_errors(bio_err);
 344             goto end;
 345         }
 346     }
 347     inp = BIO_push(bmd, in);
 348
 349     if (md == NULL) {
 350         EVP_MD_CTX *tctx;
 351         BIO_get_md_ctx(bmd, &tctx);
 352         md = EVP_MD_CTX_md(tctx);
 353     }
 354
 355     if (argc == 0) {
 356         BIO_set_fp(in, stdin, BIO_NOCLOSE);
 357         ret = do_fp(out, buf, inp, separator, out_bin, sigkey, sigbuf,
 358                     siglen, NULL, NULL, "stdin");
 359     } else {
 360         const char *md_name = NULL, *sig_name = NULL;
 361         if (!out_bin) {
 362             if (sigkey) {
 363                 const EVP_PKEY_ASN1_METHOD *ameth;
 364                 ameth = EVP_PKEY_get0_asn1(sigkey);
 365                 if (ameth)
 366                     EVP_PKEY_asn1_get0_info(NULL, NULL,
 367                                             NULL, NULL, &sig_name, ameth);
 368             }
 369             if (md)
 370                 md_name = EVP_MD_name(md);
 371         }
 372         ret = 0;
 373         for (i = 0; i < argc; i++) {
 374             int r;
 375             if (BIO_read_filename(in, argv[i]) <= 0) {
 376                 perror(argv[i]);
 377                 ret++;
 378                 continue;
 379             } else
 380                 r = do_fp(out, buf, inp, separator, out_bin, sigkey, sigbuf,
 381                           siglen, sig_name, md_name, argv[i]);
 382             if (r)
 383                 ret = r;
 384             (void)BIO_reset(bmd);
 385         }
 386     }
 387  end:
 388     OPENSSL_clear_free(buf, BUFSIZE);
 389     BIO_free(in);
 390     OPENSSL_free(passin);
 391     BIO_free_all(out);
 392     EVP_PKEY_free(sigkey);
 393     sk_OPENSSL_STRING_free(sigopts);
 394     sk_OPENSSL_STRING_free(macopts);
 395     OPENSSL_free(sigbuf);
 396     BIO_free(bmd);
 397     return (ret);
 398 }
 399
 400 int do_fp(BIO *out, unsigned char *buf, BIO *bp, int sep, int binout,
 401           EVP_PKEY *key, unsigned char *sigin, int siglen,
 402           const char *sig_name, const char *md_name,
 403           const char *file)
 404 {
 405     size_t len;
 406     int i;
 407
 408     for (;;) {
 409         i = BIO_read(bp, (char *)buf, BUFSIZE);
 410         if (i < 0) {
 411             BIO_printf(bio_err, "Read Error in %s\n", file);
 412             ERR_print_errors(bio_err);
 413             return 1;
 414         }
 415         if (i == 0)
 416             break;
 417     }
 418     if (sigin) {
 419         EVP_MD_CTX *ctx;
 420         BIO_get_md_ctx(bp, &ctx);
 421         i = EVP_DigestVerifyFinal(ctx, sigin, (unsigned int)siglen);
 422         if (i > 0)
 423             BIO_printf(out, "Verified OK\n");
 424         else if (i == 0) {
 425             BIO_printf(out, "Verification Failure\n");
 426             return 1;
 427         } else {
 428             BIO_printf(bio_err, "Error Verifying Data\n");
 429             ERR_print_errors(bio_err);
 430             return 1;
 431         }
 432         return 0;
 433     }
 434     if (key) {
 435         EVP_MD_CTX *ctx;
 436         BIO_get_md_ctx(bp, &ctx);
 437         len = BUFSIZE;
 438         if (!EVP_DigestSignFinal(ctx, buf, &len)) {
 439             BIO_printf(bio_err, "Error Signing Data\n");
 440             ERR_print_errors(bio_err);
 441             return 1;
 442         }
 443     } else {
 444         len = BIO_gets(bp, (char *)buf, BUFSIZE);
 445         if ((int)len < 0) {
 446             ERR_print_errors(bio_err);
 447             return 1;
 448         }
 449     }
 450
 451     if (binout)
 452         BIO_write(out, buf, len);
 453     else if (sep == 2) {
 454         for (i = 0; i < (int)len; i++)
 455             BIO_printf(out, "%02x", buf[i]);
 456         BIO_printf(out, " *%s\n", file);
 457     } else {
 458         if (sig_name) {
 459             BIO_puts(out, sig_name);
 460             if (md_name)
 461                 BIO_printf(out, "-%s", md_name);
 462             BIO_printf(out, "(%s)= ", file);
 463         } else if (md_name)
 464             BIO_printf(out, "%s(%s)= ", md_name, file);
 465         else
 466             BIO_printf(out, "(%s)= ", file);
 467         for (i = 0; i < (int)len; i++) {
 468             if (sep && (i != 0))
 469                 BIO_printf(out, ":");
 470             BIO_printf(out, "%02x", buf[i]);
 471         }
 472         BIO_printf(out, "\n");
 473     }
 474     return 0;
 475 }