crypto/openssl/apps/enc.c

   1 /*
   2  * Copyright 1995-2023 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 <stdlib.h>
  12 #include <string.h>
  13 #include <limits.h>
  14 #include "apps.h"
  15 #include "progs.h"
  16 #include <openssl/bio.h>
  17 #include <openssl/err.h>
  18 #include <openssl/evp.h>
  19 #include <openssl/objects.h>
  20 #include <openssl/x509.h>
  21 #include <openssl/rand.h>
  22 #include <openssl/pem.h>
  23 #ifndef OPENSSL_NO_COMP
  24 # include <openssl/comp.h>
  25 #endif
  26 #include <ctype.h>
  27
  28 #undef SIZE
  29 #undef BSIZE
  30 #define SIZE    (512)
  31 #define BSIZE   (8*1024)
  32
  33 #define PBKDF2_ITER_DEFAULT     10000
  34 #define STR(a) XSTR(a)
  35 #define XSTR(a) #a
  36
  37 static int set_hex(const char *in, unsigned char *out, int size);
  38 static void show_ciphers(const OBJ_NAME *name, void *bio_);
  39
  40 struct doall_enc_ciphers {
  41     BIO *bio;
  42     int n;
  43 };
  44
  45 typedef enum OPTION_choice {
  46     OPT_COMMON,
  47     OPT_LIST,
  48     OPT_E, OPT_IN, OPT_OUT, OPT_PASS, OPT_ENGINE, OPT_D, OPT_P, OPT_V,
  49     OPT_NOPAD, OPT_SALT, OPT_NOSALT, OPT_DEBUG, OPT_UPPER_P, OPT_UPPER_A,
  50     OPT_A, OPT_Z, OPT_BUFSIZE, OPT_K, OPT_KFILE, OPT_UPPER_K, OPT_NONE,
  51     OPT_UPPER_S, OPT_IV, OPT_MD, OPT_ITER, OPT_PBKDF2, OPT_CIPHER,
  52     OPT_R_ENUM, OPT_PROV_ENUM
  53 } OPTION_CHOICE;
  54
  55 const OPTIONS enc_options[] = {
  56     OPT_SECTION("General"),
  57     {"help", OPT_HELP, '-', "Display this summary"},
  58     {"list", OPT_LIST, '-', "List ciphers"},
  59 #ifndef OPENSSL_NO_DEPRECATED_3_0
  60     {"ciphers", OPT_LIST, '-', "Alias for -list"},
  61 #endif
  62     {"e", OPT_E, '-', "Encrypt"},
  63     {"d", OPT_D, '-', "Decrypt"},
  64     {"p", OPT_P, '-', "Print the iv/key"},
  65     {"P", OPT_UPPER_P, '-', "Print the iv/key and exit"},
  66 #ifndef OPENSSL_NO_ENGINE
  67     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  68 #endif
  69
  70     OPT_SECTION("Input"),
  71     {"in", OPT_IN, '<', "Input file"},
  72     {"k", OPT_K, 's', "Passphrase"},
  73     {"kfile", OPT_KFILE, '<', "Read passphrase from file"},
  74
  75     OPT_SECTION("Output"),
  76     {"out", OPT_OUT, '>', "Output file"},
  77     {"pass", OPT_PASS, 's', "Passphrase source"},
  78     {"v", OPT_V, '-', "Verbose output"},
  79     {"a", OPT_A, '-', "Base64 encode/decode, depending on encryption flag"},
  80     {"base64", OPT_A, '-', "Same as option -a"},
  81     {"A", OPT_UPPER_A, '-',
  82      "Used with -[base64|a] to specify base64 buffer as a single line"},
  83
  84     OPT_SECTION("Encryption"),
  85     {"nopad", OPT_NOPAD, '-', "Disable standard block padding"},
  86     {"salt", OPT_SALT, '-', "Use salt in the KDF (default)"},
  87     {"nosalt", OPT_NOSALT, '-', "Do not use salt in the KDF"},
  88     {"debug", OPT_DEBUG, '-', "Print debug info"},
  89
  90     {"bufsize", OPT_BUFSIZE, 's', "Buffer size"},
  91     {"K", OPT_UPPER_K, 's', "Raw key, in hex"},
  92     {"S", OPT_UPPER_S, 's', "Salt, in hex"},
  93     {"iv", OPT_IV, 's', "IV in hex"},
  94     {"md", OPT_MD, 's', "Use specified digest to create a key from the passphrase"},
  95     {"iter", OPT_ITER, 'p',
  96      "Specify the iteration count and force the use of PBKDF2"},
  97     {OPT_MORE_STR, 0, 0, "Default: " STR(PBKDF2_ITER_DEFAULT)},
  98     {"pbkdf2", OPT_PBKDF2, '-',
  99      "Use password-based key derivation function 2 (PBKDF2)"},
 100     {OPT_MORE_STR, 0, 0,
 101      "Use -iter to change the iteration count from " STR(PBKDF2_ITER_DEFAULT)},
 102     {"none", OPT_NONE, '-', "Don't encrypt"},
 103 #ifdef ZLIB
 104     {"z", OPT_Z, '-', "Compress or decompress encrypted data using zlib"},
 105 #endif
 106     {"", OPT_CIPHER, '-', "Any supported cipher"},
 107
 108     OPT_R_OPTIONS,
 109     OPT_PROV_OPTIONS,
 110     {NULL}
 111 };
 112
 113 int enc_main(int argc, char **argv)
 114 {
 115     static char buf[128];
 116     static const char magic[] = "Salted__";
 117     ENGINE *e = NULL;
 118     BIO *in = NULL, *out = NULL, *b64 = NULL, *benc = NULL, *rbio =
 119         NULL, *wbio = NULL;
 120     EVP_CIPHER_CTX *ctx = NULL;
 121     EVP_CIPHER *cipher = NULL;
 122     EVP_MD *dgst = NULL;
 123     const char *digestname = NULL;
 124     char *hkey = NULL, *hiv = NULL, *hsalt = NULL, *p;
 125     char *infile = NULL, *outfile = NULL, *prog;
 126     char *str = NULL, *passarg = NULL, *pass = NULL, *strbuf = NULL;
 127     const char *ciphername = NULL;
 128     char mbuf[sizeof(magic) - 1];
 129     OPTION_CHOICE o;
 130     int bsize = BSIZE, verbose = 0, debug = 0, olb64 = 0, nosalt = 0;
 131     int enc = 1, printkey = 0, i, k;
 132     int base64 = 0, informat = FORMAT_BINARY, outformat = FORMAT_BINARY;
 133     int ret = 1, inl, nopad = 0;
 134     unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
 135     unsigned char *buff = NULL, salt[PKCS5_SALT_LEN];
 136     int pbkdf2 = 0;
 137     int iter = 0;
 138     long n;
 139     struct doall_enc_ciphers dec;
 140 #ifdef ZLIB
 141     int do_zlib = 0;
 142     BIO *bzl = NULL;
 143 #endif
 144
 145     /* first check the command name */
 146     if (strcmp(argv[0], "base64") == 0)
 147         base64 = 1;
 148 #ifdef ZLIB
 149     else if (strcmp(argv[0], "zlib") == 0)
 150         do_zlib = 1;
 151 #endif
 152     else if (strcmp(argv[0], "enc") != 0)
 153         ciphername = argv[0];
 154
 155     prog = opt_init(argc, argv, enc_options);
 156     while ((o = opt_next()) != OPT_EOF) {
 157         switch (o) {
 158         case OPT_EOF:
 159         case OPT_ERR:
 160  opthelp:
 161             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 162             goto end;
 163         case OPT_HELP:
 164             opt_help(enc_options);
 165             ret = 0;
 166             goto end;
 167         case OPT_LIST:
 168             BIO_printf(bio_out, "Supported ciphers:\n");
 169             dec.bio = bio_out;
 170             dec.n = 0;
 171             OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
 172                                    show_ciphers, &dec);
 173             BIO_printf(bio_out, "\n");
 174             ret = 0;
 175             goto end;
 176         case OPT_E:
 177             enc = 1;
 178             break;
 179         case OPT_IN:
 180             infile = opt_arg();
 181             break;
 182         case OPT_OUT:
 183             outfile = opt_arg();
 184             break;
 185         case OPT_PASS:
 186             passarg = opt_arg();
 187             break;
 188         case OPT_ENGINE:
 189             e = setup_engine(opt_arg(), 0);
 190             break;
 191         case OPT_D:
 192             enc = 0;
 193             break;
 194         case OPT_P:
 195             printkey = 1;
 196             break;
 197         case OPT_V:
 198             verbose = 1;
 199             break;
 200         case OPT_NOPAD:
 201             nopad = 1;
 202             break;
 203         case OPT_SALT:
 204             nosalt = 0;
 205             break;
 206         case OPT_NOSALT:
 207             nosalt = 1;
 208             break;
 209         case OPT_DEBUG:
 210             debug = 1;
 211             break;
 212         case OPT_UPPER_P:
 213             printkey = 2;
 214             break;
 215         case OPT_UPPER_A:
 216             olb64 = 1;
 217             break;
 218         case OPT_A:
 219             base64 = 1;
 220             break;
 221         case OPT_Z:
 222 #ifdef ZLIB
 223             do_zlib = 1;
 224 #endif
 225             break;
 226         case OPT_BUFSIZE:
 227             p = opt_arg();
 228             i = (int)strlen(p) - 1;
 229             k = i >= 1 && p[i] == 'k';
 230             if (k)
 231                 p[i] = '\0';
 232             if (!opt_long(opt_arg(), &n)
 233                     || n < 0 || (k && n >= LONG_MAX / 1024))
 234                 goto opthelp;
 235             if (k)
 236                 n *= 1024;
 237             bsize = (int)n;
 238             break;
 239         case OPT_K:
 240             str = opt_arg();
 241             break;
 242         case OPT_KFILE:
 243             in = bio_open_default(opt_arg(), 'r', FORMAT_TEXT);
 244             if (in == NULL)
 245                 goto opthelp;
 246             i = BIO_gets(in, buf, sizeof(buf));
 247             BIO_free(in);
 248             in = NULL;
 249             if (i <= 0) {
 250                 BIO_printf(bio_err,
 251                            "%s Can't read key from %s\n", prog, opt_arg());
 252                 goto opthelp;
 253             }
 254             while (--i > 0 && (buf[i] == '\r' || buf[i] == '\n'))
 255                 buf[i] = '\0';
 256             if (i <= 0) {
 257                 BIO_printf(bio_err, "%s: zero length password\n", prog);
 258                 goto opthelp;
 259             }
 260             str = buf;
 261             break;
 262         case OPT_UPPER_K:
 263             hkey = opt_arg();
 264             break;
 265         case OPT_UPPER_S:
 266             hsalt = opt_arg();
 267             break;
 268         case OPT_IV:
 269             hiv = opt_arg();
 270             break;
 271         case OPT_MD:
 272             digestname = opt_arg();
 273             break;
 274         case OPT_CIPHER:
 275             ciphername = opt_unknown();
 276             break;
 277         case OPT_ITER:
 278             iter = opt_int_arg();
 279             pbkdf2 = 1;
 280             break;
 281         case OPT_PBKDF2:
 282             pbkdf2 = 1;
 283             if (iter == 0)    /* do not overwrite a chosen value */
 284                 iter = PBKDF2_ITER_DEFAULT;
 285             break;
 286         case OPT_NONE:
 287             cipher = NULL;
 288             break;
 289         case OPT_R_CASES:
 290             if (!opt_rand(o))
 291                 goto end;
 292             break;
 293         case OPT_PROV_CASES:
 294             if (!opt_provider(o))
 295                 goto end;
 296             break;
 297         }
 298     }
 299
 300     /* No extra arguments. */
 301     argc = opt_num_rest();
 302     if (argc != 0)
 303         goto opthelp;
 304     if (!app_RAND_load())
 305         goto end;
 306
 307     /* Get the cipher name, either from progname (if set) or flag. */
 308     if (ciphername != NULL) {
 309         if (!opt_cipher(ciphername, &cipher))
 310             goto opthelp;
 311     }
 312     if (digestname != NULL) {
 313         if (!opt_md(digestname, &dgst))
 314             goto opthelp;
 315     }
 316     if (dgst == NULL)
 317         dgst = (EVP_MD *)EVP_sha256();
 318
 319     if (iter == 0)
 320         iter = 1;
 321
 322     /* It must be large enough for a base64 encoded line */
 323     if (base64 && bsize < 80)
 324         bsize = 80;
 325     if (verbose)
 326         BIO_printf(bio_err, "bufsize=%d\n", bsize);
 327
 328 #ifdef ZLIB
 329     if (!do_zlib)
 330 #endif
 331         if (base64) {
 332             if (enc)
 333                 outformat = FORMAT_BASE64;
 334             else
 335                 informat = FORMAT_BASE64;
 336         }
 337
 338     strbuf = app_malloc(SIZE, "strbuf");
 339     buff = app_malloc(EVP_ENCODE_LENGTH(bsize), "evp buffer");
 340
 341     if (infile == NULL) {
 342         in = dup_bio_in(informat);
 343     } else {
 344         in = bio_open_default(infile, 'r', informat);
 345     }
 346     if (in == NULL)
 347         goto end;
 348
 349     if (str == NULL && passarg != NULL) {
 350         if (!app_passwd(passarg, NULL, &pass, NULL)) {
 351             BIO_printf(bio_err, "Error getting password\n");
 352             goto end;
 353         }
 354         str = pass;
 355     }
 356
 357     if ((str == NULL) && (cipher != NULL) && (hkey == NULL)) {
 358         if (1) {
 359 #ifndef OPENSSL_NO_UI_CONSOLE
 360             for (;;) {
 361                 char prompt[200];
 362
 363                 BIO_snprintf(prompt, sizeof(prompt), "enter %s %s password:",
 364                         EVP_CIPHER_get0_name(cipher),
 365                         (enc) ? "encryption" : "decryption");
 366                 strbuf[0] = '\0';
 367                 i = EVP_read_pw_string((char *)strbuf, SIZE, prompt, enc);
 368                 if (i == 0) {
 369                     if (strbuf[0] == '\0') {
 370                         ret = 1;
 371                         goto end;
 372                     }
 373                     str = strbuf;
 374                     break;
 375                 }
 376                 if (i < 0) {
 377                     BIO_printf(bio_err, "bad password read\n");
 378                     goto end;
 379                 }
 380             }
 381         } else {
 382 #endif
 383             BIO_printf(bio_err, "password required\n");
 384             goto end;
 385         }
 386     }
 387
 388     out = bio_open_default(outfile, 'w', outformat);
 389     if (out == NULL)
 390         goto end;
 391
 392     if (debug) {
 393         BIO_set_callback_ex(in, BIO_debug_callback_ex);
 394         BIO_set_callback_ex(out, BIO_debug_callback_ex);
 395         BIO_set_callback_arg(in, (char *)bio_err);
 396         BIO_set_callback_arg(out, (char *)bio_err);
 397     }
 398
 399     rbio = in;
 400     wbio = out;
 401
 402 #ifdef ZLIB
 403     if (do_zlib) {
 404         if ((bzl = BIO_new(BIO_f_zlib())) == NULL)
 405             goto end;
 406         if (debug) {
 407             BIO_set_callback_ex(bzl, BIO_debug_callback_ex);
 408             BIO_set_callback_arg(bzl, (char *)bio_err);
 409         }
 410         if (enc)
 411             wbio = BIO_push(bzl, wbio);
 412         else
 413             rbio = BIO_push(bzl, rbio);
 414     }
 415 #endif
 416
 417     if (base64) {
 418         if ((b64 = BIO_new(BIO_f_base64())) == NULL)
 419             goto end;
 420         if (debug) {
 421             BIO_set_callback_ex(b64, BIO_debug_callback_ex);
 422             BIO_set_callback_arg(b64, (char *)bio_err);
 423         }
 424         if (olb64)
 425             BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
 426         if (enc)
 427             wbio = BIO_push(b64, wbio);
 428         else
 429             rbio = BIO_push(b64, rbio);
 430     }
 431
 432     if (cipher != NULL) {
 433         if (str != NULL) { /* a passphrase is available */
 434             /*
 435              * Salt handling: if encrypting generate a salt if not supplied,
 436              * and write to output BIO. If decrypting use salt from input BIO
 437              * if not given with args
 438              */
 439             unsigned char *sptr;
 440             size_t str_len = strlen(str);
 441
 442             if (nosalt) {
 443                 sptr = NULL;
 444             } else {
 445                 if (hsalt != NULL && !set_hex(hsalt, salt, sizeof(salt))) {
 446                     BIO_printf(bio_err, "invalid hex salt value\n");
 447                     goto end;
 448                 }
 449                 if (enc) {  /* encryption */
 450                     if (hsalt == NULL) {
 451                         if (RAND_bytes(salt, sizeof(salt)) <= 0) {
 452                             BIO_printf(bio_err, "RAND_bytes failed\n");
 453                             goto end;
 454                         }
 455                         /*
 456                          * If -P option then don't bother writing.
 457                          * If salt is given, shouldn't either ?
 458                          */
 459                         if ((printkey != 2)
 460                             && (BIO_write(wbio, magic,
 461                                           sizeof(magic) - 1) != sizeof(magic) - 1
 462                                 || BIO_write(wbio,
 463                                              (char *)salt,
 464                                              sizeof(salt)) != sizeof(salt))) {
 465                             BIO_printf(bio_err, "error writing output file\n");
 466                             goto end;
 467                         }
 468                     }
 469                 } else {    /* decryption */
 470                     if (hsalt == NULL) {
 471                         if (BIO_read(rbio, mbuf, sizeof(mbuf)) != sizeof(mbuf)) {
 472                             BIO_printf(bio_err, "error reading input file\n");
 473                             goto end;
 474                         }
 475                         if (memcmp(mbuf, magic, sizeof(mbuf)) == 0) { /* file IS salted */
 476                             if (BIO_read(rbio, salt,
 477                                          sizeof(salt)) != sizeof(salt)) {
 478                                 BIO_printf(bio_err, "error reading input file\n");
 479                                 goto end;
 480                             }
 481                         } else { /* file is NOT salted, NO salt available */
 482                             BIO_printf(bio_err, "bad magic number\n");
 483                             goto end;
 484                         }
 485                     }
 486                 }
 487                 sptr = salt;
 488             }
 489
 490             if (pbkdf2 == 1) {
 491                 /*
 492                 * derive key and default iv
 493                 * concatenated into a temporary buffer
 494                 */
 495                 unsigned char tmpkeyiv[EVP_MAX_KEY_LENGTH + EVP_MAX_IV_LENGTH];
 496                 int iklen = EVP_CIPHER_get_key_length(cipher);
 497                 int ivlen = EVP_CIPHER_get_iv_length(cipher);
 498                 /* not needed if HASH_UPDATE() is fixed : */
 499                 int islen = (sptr != NULL ? sizeof(salt) : 0);
 500                 if (!PKCS5_PBKDF2_HMAC(str, str_len, sptr, islen,
 501                                        iter, dgst, iklen+ivlen, tmpkeyiv)) {
 502                     BIO_printf(bio_err, "PKCS5_PBKDF2_HMAC failed\n");
 503                     goto end;
 504                 }
 505                 /* split and move data back to global buffer */
 506                 memcpy(key, tmpkeyiv, iklen);
 507                 memcpy(iv, tmpkeyiv+iklen, ivlen);
 508             } else {
 509                 BIO_printf(bio_err, "*** WARNING : "
 510                                     "deprecated key derivation used.\n"
 511                                     "Using -iter or -pbkdf2 would be better.\n");
 512                 if (!EVP_BytesToKey(cipher, dgst, sptr,
 513                                     (unsigned char *)str, str_len,
 514                                     1, key, iv)) {
 515                     BIO_printf(bio_err, "EVP_BytesToKey failed\n");
 516                     goto end;
 517                 }
 518             }
 519             /*
 520              * zero the complete buffer or the string passed from the command
 521              * line.
 522              */
 523             if (str == strbuf)
 524                 OPENSSL_cleanse(str, SIZE);
 525             else
 526                 OPENSSL_cleanse(str, str_len);
 527         }
 528         if (hiv != NULL) {
 529             int siz = EVP_CIPHER_get_iv_length(cipher);
 530             if (siz == 0) {
 531                 BIO_printf(bio_err, "warning: iv not used by this cipher\n");
 532             } else if (!set_hex(hiv, iv, siz)) {
 533                 BIO_printf(bio_err, "invalid hex iv value\n");
 534                 goto end;
 535             }
 536         }
 537         if ((hiv == NULL) && (str == NULL)
 538             && EVP_CIPHER_get_iv_length(cipher) != 0) {
 539             /*
 540              * No IV was explicitly set and no IV was generated.
 541              * Hence the IV is undefined, making correct decryption impossible.
 542              */
 543             BIO_printf(bio_err, "iv undefined\n");
 544             goto end;
 545         }
 546         if (hkey != NULL) {
 547             if (!set_hex(hkey, key, EVP_CIPHER_get_key_length(cipher))) {
 548                 BIO_printf(bio_err, "invalid hex key value\n");
 549                 goto end;
 550             }
 551             /* wiping secret data as we no longer need it */
 552             cleanse(hkey);
 553         }
 554
 555         if ((benc = BIO_new(BIO_f_cipher())) == NULL)
 556             goto end;
 557
 558         /*
 559          * Since we may be changing parameters work on the encryption context
 560          * rather than calling BIO_set_cipher().
 561          */
 562
 563         BIO_get_cipher_ctx(benc, &ctx);
 564
 565         if (!EVP_CipherInit_ex(ctx, cipher, e, NULL, NULL, enc)) {
 566             BIO_printf(bio_err, "Error setting cipher %s\n",
 567                        EVP_CIPHER_get0_name(cipher));
 568             ERR_print_errors(bio_err);
 569             goto end;
 570         }
 571
 572         if (nopad)
 573             EVP_CIPHER_CTX_set_padding(ctx, 0);
 574
 575         if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc)) {
 576             BIO_printf(bio_err, "Error setting cipher %s\n",
 577                        EVP_CIPHER_get0_name(cipher));
 578             ERR_print_errors(bio_err);
 579             goto end;
 580         }
 581
 582         if (debug) {
 583             BIO_set_callback_ex(benc, BIO_debug_callback_ex);
 584             BIO_set_callback_arg(benc, (char *)bio_err);
 585         }
 586
 587         if (printkey) {
 588             if (!nosalt) {
 589                 printf("salt=");
 590                 for (i = 0; i < (int)sizeof(salt); i++)
 591                     printf("%02X", salt[i]);
 592                 printf("\n");
 593             }
 594             if (EVP_CIPHER_get_key_length(cipher) > 0) {
 595                 printf("key=");
 596                 for (i = 0; i < EVP_CIPHER_get_key_length(cipher); i++)
 597                     printf("%02X", key[i]);
 598                 printf("\n");
 599             }
 600             if (EVP_CIPHER_get_iv_length(cipher) > 0) {
 601                 printf("iv =");
 602                 for (i = 0; i < EVP_CIPHER_get_iv_length(cipher); i++)
 603                     printf("%02X", iv[i]);
 604                 printf("\n");
 605             }
 606             if (printkey == 2) {
 607                 ret = 0;
 608                 goto end;
 609             }
 610         }
 611     }
 612
 613     /* Only encrypt/decrypt as we write the file */
 614     if (benc != NULL)
 615         wbio = BIO_push(benc, wbio);
 616
 617     while (BIO_pending(rbio) || !BIO_eof(rbio)) {
 618         inl = BIO_read(rbio, (char *)buff, bsize);
 619         if (inl <= 0)
 620             break;
 621         if (BIO_write(wbio, (char *)buff, inl) != inl) {
 622             BIO_printf(bio_err, "error writing output file\n");
 623             goto end;
 624         }
 625     }
 626     if (!BIO_flush(wbio)) {
 627         if (enc)
 628             BIO_printf(bio_err, "bad encrypt\n");
 629         else
 630             BIO_printf(bio_err, "bad decrypt\n");
 631         goto end;
 632     }
 633
 634     ret = 0;
 635     if (verbose) {
 636         BIO_printf(bio_err, "bytes read   : %8ju\n", BIO_number_read(in));
 637         BIO_printf(bio_err, "bytes written: %8ju\n", BIO_number_written(out));
 638     }
 639  end:
 640     ERR_print_errors(bio_err);
 641     OPENSSL_free(strbuf);
 642     OPENSSL_free(buff);
 643     BIO_free(in);
 644     BIO_free_all(out);
 645     BIO_free(benc);
 646     BIO_free(b64);
 647     EVP_MD_free(dgst);
 648     EVP_CIPHER_free(cipher);
 649 #ifdef ZLIB
 650     BIO_free(bzl);
 651 #endif
 652     release_engine(e);
 653     OPENSSL_free(pass);
 654     return ret;
 655 }
 656
 657 static void show_ciphers(const OBJ_NAME *name, void *arg)
 658 {
 659     struct doall_enc_ciphers *dec = (struct doall_enc_ciphers *)arg;
 660     const EVP_CIPHER *cipher;
 661
 662     if (!islower((unsigned char)*name->name))
 663         return;
 664
 665     /* Filter out ciphers that we cannot use */
 666     cipher = EVP_get_cipherbyname(name->name);
 667     if (cipher == NULL
 668             || (EVP_CIPHER_get_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) != 0
 669             || EVP_CIPHER_get_mode(cipher) == EVP_CIPH_XTS_MODE)
 670         return;
 671
 672     BIO_printf(dec->bio, "-%-25s", name->name);
 673     if (++dec->n == 3) {
 674         BIO_printf(dec->bio, "\n");
 675         dec->n = 0;
 676     } else
 677         BIO_printf(dec->bio, " ");
 678 }
 679
 680 static int set_hex(const char *in, unsigned char *out, int size)
 681 {
 682     int i, n;
 683     unsigned char j;
 684
 685     i = size * 2;
 686     n = strlen(in);
 687     if (n > i) {
 688         BIO_printf(bio_err, "hex string is too long, ignoring excess\n");
 689         n = i; /* ignore exceeding part */
 690     } else if (n < i) {
 691         BIO_printf(bio_err, "hex string is too short, padding with zero bytes to length\n");
 692     }
 693
 694     memset(out, 0, size);
 695     for (i = 0; i < n; i++) {
 696         j = (unsigned char)*in++;
 697         if (!isxdigit(j)) {
 698             BIO_printf(bio_err, "non-hex digit\n");
 699             return 0;
 700         }
 701         j = (unsigned char)OPENSSL_hexchar2int(j);
 702         if (i & 1)
 703             out[i / 2] |= j;
 704         else
 705             out[i / 2] = (j << 4);
 706     }
 707     return 1;
 708 }