apps/dgst.c

   1 /*
   2  * Copyright 1995-2021 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, int xoflen,
  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_COMMON,
  40     OPT_LIST,
  41     OPT_C, OPT_R, OPT_OUT, OPT_SIGN, OPT_PASSIN, OPT_VERIFY,
  42     OPT_PRVERIFY, OPT_SIGNATURE, OPT_KEYFORM, OPT_ENGINE, OPT_ENGINE_IMPL,
  43     OPT_HEX, OPT_BINARY, OPT_DEBUG, OPT_FIPS_FINGERPRINT,
  44     OPT_HMAC, OPT_MAC, OPT_SIGOPT, OPT_MACOPT, OPT_XOFLEN,
  45     OPT_DIGEST,
  46     OPT_R_ENUM, OPT_PROV_ENUM
  47 } OPTION_CHOICE;
  48
  49 const OPTIONS dgst_options[] = {
  50     {OPT_HELP_STR, 1, '-', "Usage: %s [options] [file...]\n"},
  51
  52     OPT_SECTION("General"),
  53     {"help", OPT_HELP, '-', "Display this summary"},
  54     {"list", OPT_LIST, '-', "List digests"},
  55 #ifndef OPENSSL_NO_ENGINE
  56     {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
  57     {"engine_impl", OPT_ENGINE_IMPL, '-',
  58      "Also use engine given by -engine for digest operations"},
  59 #endif
  60     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  61
  62     OPT_SECTION("Output"),
  63     {"c", OPT_C, '-', "Print the digest with separating colons"},
  64     {"r", OPT_R, '-', "Print the digest in coreutils format"},
  65     {"out", OPT_OUT, '>', "Output to filename rather than stdout"},
  66     {"keyform", OPT_KEYFORM, 'f', "Key file format (ENGINE, other values ignored)"},
  67     {"hex", OPT_HEX, '-', "Print as hex dump"},
  68     {"binary", OPT_BINARY, '-', "Print in binary form"},
  69     {"xoflen", OPT_XOFLEN, 'p', "Output length for XOF algorithms"},
  70     {"d", OPT_DEBUG, '-', "Print debug info"},
  71     {"debug", OPT_DEBUG, '-', "Print debug info"},
  72
  73     OPT_SECTION("Signing"),
  74     {"sign", OPT_SIGN, 's', "Sign digest using private key"},
  75     {"verify", OPT_VERIFY, 's', "Verify a signature using public key"},
  76     {"prverify", OPT_PRVERIFY, 's', "Verify a signature using private key"},
  77     {"sigopt", OPT_SIGOPT, 's', "Signature parameter in n:v form"},
  78     {"signature", OPT_SIGNATURE, '<', "File with signature to verify"},
  79     {"hmac", OPT_HMAC, 's', "Create hashed MAC with key"},
  80     {"mac", OPT_MAC, 's', "Create MAC (not necessarily HMAC)"},
  81     {"macopt", OPT_MACOPT, 's', "MAC algorithm parameters in n:v form or key"},
  82     {"", OPT_DIGEST, '-', "Any supported digest"},
  83     {"fips-fingerprint", OPT_FIPS_FINGERPRINT, '-',
  84      "Compute HMAC with the key used in OpenSSL-FIPS fingerprint"},
  85
  86     OPT_R_OPTIONS,
  87     OPT_PROV_OPTIONS,
  88
  89     OPT_PARAMETERS(),
  90     {"file", 0, 0, "Files to digest (optional; default is stdin)"},
  91     {NULL}
  92 };
  93
  94 int dgst_main(int argc, char **argv)
  95 {
  96     BIO *in = NULL, *inp, *bmd = NULL, *out = NULL;
  97     ENGINE *e = NULL, *impl = NULL;
  98     EVP_PKEY *sigkey = NULL;
  99     STACK_OF(OPENSSL_STRING) *sigopts = NULL, *macopts = NULL;
 100     char *hmac_key = NULL;
 101     char *mac_name = NULL, *digestname = NULL;
 102     char *passinarg = NULL, *passin = NULL;
 103     EVP_MD *md = NULL;
 104     const char *outfile = NULL, *keyfile = NULL, *prog = NULL;
 105     const char *sigfile = NULL;
 106     const char *md_name = NULL;
 107     OPTION_CHOICE o;
 108     int separator = 0, debug = 0, keyform = FORMAT_UNDEF, siglen = 0;
 109     int i, ret = EXIT_FAILURE, out_bin = -1, want_pub = 0, do_verify = 0;
 110     int xoflen = 0;
 111     unsigned char *buf = NULL, *sigbuf = NULL;
 112     int engine_impl = 0;
 113     struct doall_dgst_digests dec;
 114
 115     buf = app_malloc(BUFSIZE, "I/O buffer");
 116     md = (EVP_MD *)EVP_get_digestbyname(argv[0]);
 117
 118     prog = opt_init(argc, argv, dgst_options);
 119     while ((o = opt_next()) != OPT_EOF) {
 120         switch (o) {
 121         case OPT_EOF:
 122         case OPT_ERR:
 123  opthelp:
 124             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 125             goto end;
 126         case OPT_HELP:
 127             opt_help(dgst_options);
 128             ret = EXIT_SUCCESS;
 129             goto end;
 130         case OPT_LIST:
 131             BIO_printf(bio_out, "Supported digests:\n");
 132             dec.bio = bio_out;
 133             dec.n = 0;
 134             OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_MD_METH,
 135                                    show_digests, &dec);
 136             BIO_printf(bio_out, "\n");
 137             ret = EXIT_SUCCESS;
 138             goto end;
 139         case OPT_C:
 140             separator = 1;
 141             break;
 142         case OPT_R:
 143             separator = 2;
 144             break;
 145         case OPT_R_CASES:
 146             if (!opt_rand(o))
 147                 goto end;
 148             break;
 149         case OPT_OUT:
 150             outfile = opt_arg();
 151             break;
 152         case OPT_SIGN:
 153             keyfile = opt_arg();
 154             break;
 155         case OPT_PASSIN:
 156             passinarg = opt_arg();
 157             break;
 158         case OPT_VERIFY:
 159             keyfile = opt_arg();
 160             want_pub = do_verify = 1;
 161             break;
 162         case OPT_PRVERIFY:
 163             keyfile = opt_arg();
 164             do_verify = 1;
 165             break;
 166         case OPT_SIGNATURE:
 167             sigfile = opt_arg();
 168             break;
 169         case OPT_KEYFORM:
 170             if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyform))
 171                 goto opthelp;
 172             break;
 173         case OPT_ENGINE:
 174             e = setup_engine(opt_arg(), 0);
 175             break;
 176         case OPT_ENGINE_IMPL:
 177             engine_impl = 1;
 178             break;
 179         case OPT_HEX:
 180             out_bin = 0;
 181             break;
 182         case OPT_BINARY:
 183             out_bin = 1;
 184             break;
 185         case OPT_XOFLEN:
 186             xoflen = atoi(opt_arg());
 187             break;
 188         case OPT_DEBUG:
 189             debug = 1;
 190             break;
 191         case OPT_FIPS_FINGERPRINT:
 192             hmac_key = "etaonrishdlcupfm";
 193             break;
 194         case OPT_HMAC:
 195             hmac_key = opt_arg();
 196             break;
 197         case OPT_MAC:
 198             mac_name = opt_arg();
 199             break;
 200         case OPT_SIGOPT:
 201             if (!sigopts)
 202                 sigopts = sk_OPENSSL_STRING_new_null();
 203             if (!sigopts || !sk_OPENSSL_STRING_push(sigopts, opt_arg()))
 204                 goto opthelp;
 205             break;
 206         case OPT_MACOPT:
 207             if (!macopts)
 208                 macopts = sk_OPENSSL_STRING_new_null();
 209             if (!macopts || !sk_OPENSSL_STRING_push(macopts, opt_arg()))
 210                 goto opthelp;
 211             break;
 212         case OPT_DIGEST:
 213             digestname = opt_unknown();
 214             break;
 215         case OPT_PROV_CASES:
 216             if (!opt_provider(o))
 217                 goto end;
 218             break;
 219         }
 220     }
 221
 222     /* Remaining args are files to digest. */
 223     argc = opt_num_rest();
 224     argv = opt_rest();
 225     if (keyfile != NULL && argc > 1) {
 226         BIO_printf(bio_err, "%s: Can only sign or verify one file.\n", prog);
 227         goto end;
 228     }
 229     if (!app_RAND_load())
 230         goto end;
 231
 232     if (digestname != NULL) {
 233         if (!opt_md(digestname, &md))
 234             goto opthelp;
 235     }
 236
 237     if (do_verify && sigfile == NULL) {
 238         BIO_printf(bio_err,
 239                    "No signature to verify: use the -signature option\n");
 240         goto end;
 241     }
 242     if (engine_impl)
 243         impl = e;
 244
 245     in = BIO_new(BIO_s_file());
 246     bmd = BIO_new(BIO_f_md());
 247     if (in == NULL || bmd == NULL)
 248         goto end;
 249
 250     if (debug) {
 251         BIO_set_callback_ex(in, BIO_debug_callback_ex);
 252         /* needed for windows 3.1 */
 253         BIO_set_callback_arg(in, (char *)bio_err);
 254     }
 255
 256     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 257         BIO_printf(bio_err, "Error getting password\n");
 258         goto end;
 259     }
 260
 261     if (out_bin == -1) {
 262         if (keyfile != NULL)
 263             out_bin = 1;
 264         else
 265             out_bin = 0;
 266     }
 267
 268     out = bio_open_default(outfile, 'w', out_bin ? FORMAT_BINARY : FORMAT_TEXT);
 269     if (out == NULL)
 270         goto end;
 271
 272     if ((!(mac_name == NULL) + !(keyfile == NULL) + !(hmac_key == NULL)) > 1) {
 273         BIO_printf(bio_err, "MAC and signing key cannot both be specified\n");
 274         goto end;
 275     }
 276
 277     if (keyfile != NULL) {
 278         int type;
 279
 280         if (want_pub)
 281             sigkey = load_pubkey(keyfile, keyform, 0, NULL, e, "public key");
 282         else
 283             sigkey = load_key(keyfile, keyform, 0, passin, e, "private key");
 284         if (sigkey == NULL) {
 285             /*
 286              * load_[pub]key() has already printed an appropriate message
 287              */
 288             goto end;
 289         }
 290         type = EVP_PKEY_get_id(sigkey);
 291         if (type == EVP_PKEY_ED25519 || type == EVP_PKEY_ED448) {
 292             /*
 293              * We implement PureEdDSA for these which doesn't have a separate
 294              * digest, and only supports one shot.
 295              */
 296             BIO_printf(bio_err, "Key type not supported for this operation\n");
 297             goto end;
 298         }
 299     }
 300
 301     if (mac_name != NULL) {
 302         EVP_PKEY_CTX *mac_ctx = NULL;
 303
 304         if (!init_gen_str(&mac_ctx, mac_name, impl, 0, NULL, NULL))
 305             goto end;
 306         if (macopts != NULL) {
 307             for (i = 0; i < sk_OPENSSL_STRING_num(macopts); i++) {
 308                 char *macopt = sk_OPENSSL_STRING_value(macopts, i);
 309
 310                 if (pkey_ctrl_string(mac_ctx, macopt) <= 0) {
 311                     EVP_PKEY_CTX_free(mac_ctx);
 312                     BIO_printf(bio_err, "MAC parameter error \"%s\"\n", macopt);
 313                     goto end;
 314                 }
 315             }
 316         }
 317
 318         sigkey = app_keygen(mac_ctx, mac_name, 0, 0 /* not verbose */);
 319         /* Verbose output would make external-tests gost-engine fail */
 320         EVP_PKEY_CTX_free(mac_ctx);
 321     }
 322
 323     if (hmac_key != NULL) {
 324         if (md == NULL)
 325             md = (EVP_MD *)EVP_sha256();
 326         sigkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_HMAC, impl,
 327                                               (unsigned char *)hmac_key,
 328                                               strlen(hmac_key));
 329         if (sigkey == NULL)
 330             goto end;
 331     }
 332
 333     if (sigkey != NULL) {
 334         EVP_MD_CTX *mctx = NULL;
 335         EVP_PKEY_CTX *pctx = NULL;
 336         int res;
 337
 338         if (BIO_get_md_ctx(bmd, &mctx) <= 0) {
 339             BIO_printf(bio_err, "Error getting context\n");
 340             goto end;
 341         }
 342         if (do_verify)
 343             res = EVP_DigestVerifyInit(mctx, &pctx, md, impl, sigkey);
 344         else
 345             res = EVP_DigestSignInit(mctx, &pctx, md, impl, sigkey);
 346         if (res == 0) {
 347             BIO_printf(bio_err, "Error setting context\n");
 348             goto end;
 349         }
 350         if (sigopts != NULL) {
 351             for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
 352                 char *sigopt = sk_OPENSSL_STRING_value(sigopts, i);
 353
 354                 if (pkey_ctrl_string(pctx, sigopt) <= 0) {
 355                     BIO_printf(bio_err, "Signature parameter error \"%s\"\n",
 356                                sigopt);
 357                     goto end;
 358                 }
 359             }
 360         }
 361     }
 362     /* we use md as a filter, reading from 'in' */
 363     else {
 364         EVP_MD_CTX *mctx = NULL;
 365         if (BIO_get_md_ctx(bmd, &mctx) <= 0) {
 366             BIO_printf(bio_err, "Error getting context\n");
 367             goto end;
 368         }
 369         if (md == NULL)
 370             md = (EVP_MD *)EVP_sha256();
 371         if (!EVP_DigestInit_ex(mctx, md, impl)) {
 372             BIO_printf(bio_err, "Error setting digest\n");
 373             goto end;
 374         }
 375     }
 376
 377     if (sigfile != NULL && sigkey != NULL) {
 378         BIO *sigbio = BIO_new_file(sigfile, "rb");
 379
 380         if (sigbio == NULL) {
 381             BIO_printf(bio_err, "Error opening signature file %s\n", sigfile);
 382             goto end;
 383         }
 384         siglen = EVP_PKEY_get_size(sigkey);
 385         sigbuf = app_malloc(siglen, "signature buffer");
 386         siglen = BIO_read(sigbio, sigbuf, siglen);
 387         BIO_free(sigbio);
 388         if (siglen <= 0) {
 389             BIO_printf(bio_err, "Error reading signature file %s\n", sigfile);
 390             goto end;
 391         }
 392     }
 393     inp = BIO_push(bmd, in);
 394
 395     if (md == NULL) {
 396         EVP_MD_CTX *tctx;
 397
 398         BIO_get_md_ctx(bmd, &tctx);
 399         md = EVP_MD_CTX_get1_md(tctx);
 400     }
 401     if (md != NULL)
 402         md_name = EVP_MD_get0_name(md);
 403
 404     if (xoflen > 0) {
 405         if (!(EVP_MD_get_flags(md) & EVP_MD_FLAG_XOF)) {
 406             BIO_printf(bio_err, "Length can only be specified for XOF\n");
 407             goto end;
 408         }
 409         if (sigkey != NULL) {
 410             BIO_printf(bio_err, "Signing key cannot be specified for XOF\n");
 411             goto end;
 412         }
 413     }
 414
 415     if (argc == 0) {
 416         BIO_set_fp(in, stdin, BIO_NOCLOSE);
 417         ret = do_fp(out, buf, inp, separator, out_bin, xoflen, sigkey, sigbuf,
 418                     siglen, NULL, md_name, "stdin");
 419     } else {
 420         const char *sig_name = NULL;
 421
 422         if (out_bin == 0) {
 423             if (sigkey != NULL)
 424                 sig_name = EVP_PKEY_get0_type_name(sigkey);
 425         }
 426         ret = EXIT_SUCCESS;
 427         for (i = 0; i < argc; i++) {
 428             if (BIO_read_filename(in, argv[i]) <= 0) {
 429                 perror(argv[i]);
 430                 ret = EXIT_FAILURE;
 431                 continue;
 432             } else {
 433                 if (do_fp(out, buf, inp, separator, out_bin, xoflen,
 434                           sigkey, sigbuf, siglen, sig_name, md_name, argv[i]))
 435                     ret = EXIT_FAILURE;
 436             }
 437             (void)BIO_reset(bmd);
 438         }
 439     }
 440  end:
 441     if (ret != EXIT_SUCCESS)
 442         ERR_print_errors(bio_err);
 443     OPENSSL_clear_free(buf, BUFSIZE);
 444     BIO_free(in);
 445     OPENSSL_free(passin);
 446     BIO_free_all(out);
 447     EVP_MD_free(md);
 448     EVP_PKEY_free(sigkey);
 449     sk_OPENSSL_STRING_free(sigopts);
 450     sk_OPENSSL_STRING_free(macopts);
 451     OPENSSL_free(sigbuf);
 452     BIO_free(bmd);
 453     release_engine(e);
 454     return ret;
 455 }
 456
 457 static void show_digests(const OBJ_NAME *name, void *arg)
 458 {
 459     struct doall_dgst_digests *dec = (struct doall_dgst_digests *)arg;
 460     const EVP_MD *md = NULL;
 461
 462     /* Filter out signed digests (a.k.a signature algorithms) */
 463     if (strstr(name->name, "rsa") != NULL || strstr(name->name, "RSA") != NULL)
 464         return;
 465
 466     if (!islower((unsigned char)*name->name))
 467         return;
 468
 469     /* Filter out message digests that we cannot use */
 470     md = EVP_get_digestbyname(name->name);
 471     if (md == NULL)
 472         return;
 473
 474     BIO_printf(dec->bio, "-%-25s", name->name);
 475     if (++dec->n == 3) {
 476         BIO_printf(dec->bio, "\n");
 477         dec->n = 0;
 478     } else {
 479         BIO_printf(dec->bio, " ");
 480     }
 481 }
 482
 483 /*
 484  * The newline_escape_filename function performs newline escaping for any
 485  * filename that contains a newline.  This function also takes a pointer
 486  * to backslash. The backslash pointer is a flag to indicating whether a newline
 487  * is present in the filename.  If a newline is present, the backslash flag is
 488  * set and the output format will contain a backslash at the beginning of the
 489  * digest output. This output format is to replicate the output format found
 490  * in the '*sum' checksum programs. This aims to preserve backward
 491  * compatibility.
 492  */
 493 static const char *newline_escape_filename(const char *file, int * backslash)
 494 {
 495     size_t i, e = 0, length = strlen(file), newline_count = 0, mem_len = 0;
 496     char *file_cpy = NULL;
 497
 498     for (i = 0; i < length; i++)
 499         if (file[i] == '\n')
 500             newline_count++;
 501
 502     mem_len = length + newline_count + 1;
 503     file_cpy = app_malloc(mem_len, file);
 504     i = 0;
 505
 506     while (e < length) {
 507         const char c = file[e];
 508         if (c == '\n') {
 509             file_cpy[i++] = '\\';
 510             file_cpy[i++] = 'n';
 511             *backslash = 1;
 512         } else {
 513             file_cpy[i++] = c;
 514         }
 515         e++;
 516     }
 517     file_cpy[i] = '\0';
 518     return (const char*)file_cpy;
 519 }
 520
 521
 522 int do_fp(BIO *out, unsigned char *buf, BIO *bp, int sep, int binout, int xoflen,
 523           EVP_PKEY *key, unsigned char *sigin, int siglen,
 524           const char *sig_name, const char *md_name,
 525           const char *file)
 526 {
 527     size_t len = BUFSIZE;
 528     int i, backslash = 0, ret = EXIT_FAILURE;
 529     unsigned char *allocated_buf = NULL;
 530
 531     while (BIO_pending(bp) || !BIO_eof(bp)) {
 532         i = BIO_read(bp, (char *)buf, BUFSIZE);
 533         if (i < 0) {
 534             BIO_printf(bio_err, "Read error in %s\n", file);
 535             goto end;
 536         }
 537         if (i == 0)
 538             break;
 539     }
 540     if (sigin != NULL) {
 541         EVP_MD_CTX *ctx;
 542         BIO_get_md_ctx(bp, &ctx);
 543         i = EVP_DigestVerifyFinal(ctx, sigin, (unsigned int)siglen);
 544         if (i > 0) {
 545             BIO_printf(out, "Verified OK\n");
 546         } else if (i == 0) {
 547             BIO_printf(out, "Verification failure\n");
 548             goto end;
 549         } else {
 550             BIO_printf(bio_err, "Error verifying data\n");
 551             goto end;
 552         }
 553         ret = EXIT_SUCCESS;
 554         goto end;
 555     }
 556     if (key != NULL) {
 557         EVP_MD_CTX *ctx;
 558         size_t tmplen;
 559
 560         BIO_get_md_ctx(bp, &ctx);
 561         if (!EVP_DigestSignFinal(ctx, NULL, &tmplen)) {
 562             BIO_printf(bio_err, "Error getting maximum length of signed data\n");
 563             goto end;
 564         }
 565         if (tmplen > BUFSIZE) {
 566             len = tmplen;
 567             allocated_buf = app_malloc(len, "Signature buffer");
 568             buf = allocated_buf;
 569         }
 570         if (!EVP_DigestSignFinal(ctx, buf, &len)) {
 571             BIO_printf(bio_err, "Error signing data\n");
 572             goto end;
 573         }
 574     } else if (xoflen > 0) {
 575         EVP_MD_CTX *ctx;
 576
 577         len = xoflen;
 578         if (len > BUFSIZE) {
 579             allocated_buf = app_malloc(len, "Digest buffer");
 580             buf = allocated_buf;
 581         }
 582
 583         BIO_get_md_ctx(bp, &ctx);
 584
 585         if (!EVP_DigestFinalXOF(ctx, buf, len)) {
 586             BIO_printf(bio_err, "Error Digesting Data\n");
 587             goto end;
 588         }
 589     } else {
 590         len = BIO_gets(bp, (char *)buf, BUFSIZE);
 591         if ((int)len < 0)
 592             goto end;
 593     }
 594
 595     if (binout) {
 596         BIO_write(out, buf, len);
 597     } else if (sep == 2) {
 598         file = newline_escape_filename(file, &backslash);
 599
 600         if (backslash == 1)
 601             BIO_puts(out, "\\");
 602
 603         for (i = 0; i < (int)len; i++)
 604             BIO_printf(out, "%02x", buf[i]);
 605
 606         BIO_printf(out, " *%s\n", file);
 607         OPENSSL_free((char *)file);
 608     } else {
 609         if (sig_name != NULL) {
 610             BIO_puts(out, sig_name);
 611             if (md_name != NULL)
 612                 BIO_printf(out, "-%s", md_name);
 613             BIO_printf(out, "(%s)= ", file);
 614         } else if (md_name != NULL) {
 615             BIO_printf(out, "%s(%s)= ", md_name, file);
 616         } else {
 617             BIO_printf(out, "(%s)= ", file);
 618         }
 619         for (i = 0; i < (int)len; i++) {
 620             if (sep && (i != 0))
 621                 BIO_printf(out, ":");
 622             BIO_printf(out, "%02x", buf[i]);
 623         }
 624         BIO_printf(out, "\n");
 625     }
 626
 627     ret = EXIT_SUCCESS;
 628  end:
 629     if (allocated_buf != NULL)
 630         OPENSSL_clear_free(allocated_buf, len);
 631
 632     return ret;
 633 }