apps/enc.c

   1 /*
   2  * Copyright 1995-2018 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 static int set_hex(const char *in, unsigned char *out, int size);
  34 static void show_ciphers(const OBJ_NAME *name, void *bio_);
  35
  36 struct doall_enc_ciphers {
  37     BIO *bio;
  38     int n;
  39 };
  40
  41 typedef enum OPTION_choice {
  42     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  43     OPT_LIST,
  44     OPT_E, OPT_IN, OPT_OUT, OPT_PASS, OPT_ENGINE, OPT_D, OPT_P, OPT_V,
  45     OPT_NOPAD, OPT_SALT, OPT_NOSALT, OPT_DEBUG, OPT_UPPER_P, OPT_UPPER_A,
  46     OPT_A, OPT_Z, OPT_BUFSIZE, OPT_K, OPT_KFILE, OPT_UPPER_K, OPT_NONE,
  47     OPT_UPPER_S, OPT_IV, OPT_MD, OPT_ITER, OPT_PBKDF2, OPT_CIPHER,
  48     OPT_R_ENUM
  49 } OPTION_CHOICE;
  50
  51 const OPTIONS enc_options[] = {
  52     {"help", OPT_HELP, '-', "Display this summary"},
  53     {"ciphers", OPT_LIST, '-', "List ciphers"},
  54     {"in", OPT_IN, '<', "Input file"},
  55     {"out", OPT_OUT, '>', "Output file"},
  56     {"pass", OPT_PASS, 's', "Passphrase source"},
  57     {"e", OPT_E, '-', "Encrypt"},
  58     {"d", OPT_D, '-', "Decrypt"},
  59     {"p", OPT_P, '-', "Print the iv/key"},
  60     {"P", OPT_UPPER_P, '-', "Print the iv/key and exit"},
  61     {"v", OPT_V, '-', "Verbose output"},
  62     {"nopad", OPT_NOPAD, '-', "Disable standard block padding"},
  63     {"salt", OPT_SALT, '-', "Use salt in the KDF (default)"},
  64     {"nosalt", OPT_NOSALT, '-', "Do not use salt in the KDF"},
  65     {"debug", OPT_DEBUG, '-', "Print debug info"},
  66     {"a", OPT_A, '-', "Base64 encode/decode, depending on encryption flag"},
  67     {"base64", OPT_A, '-', "Same as option -a"},
  68     {"A", OPT_UPPER_A, '-',
  69      "Used with -[base64|a] to specify base64 buffer as a single line"},
  70     {"bufsize", OPT_BUFSIZE, 's', "Buffer size"},
  71     {"k", OPT_K, 's', "Passphrase"},
  72     {"kfile", OPT_KFILE, '<', "Read passphrase from file"},
  73     {"K", OPT_UPPER_K, 's', "Raw key, in hex"},
  74     {"S", OPT_UPPER_S, 's', "Salt, in hex"},
  75     {"iv", OPT_IV, 's', "IV in hex"},
  76     {"md", OPT_MD, 's', "Use specified digest to create a key from the passphrase"},
  77     {"iter", OPT_ITER, 'p', "Specify the iteration count and force use of PBKDF2"},
  78     {"pbkdf2", OPT_PBKDF2, '-', "Use password-based key derivation function 2"},
  79     {"none", OPT_NONE, '-', "Don't encrypt"},
  80     {"", OPT_CIPHER, '-', "Any supported cipher"},
  81     OPT_R_OPTIONS,
  82 #ifdef ZLIB
  83     {"z", OPT_Z, '-', "Use zlib as the 'encryption'"},
  84 #endif
  85 #ifndef OPENSSL_NO_ENGINE
  86     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  87 #endif
  88     {NULL}
  89 };
  90
  91 int enc_main(int argc, char **argv)
  92 {
  93     static char buf[128];
  94     static const char magic[] = "Salted__";
  95     ENGINE *e = NULL;
  96     BIO *in = NULL, *out = NULL, *b64 = NULL, *benc = NULL, *rbio =
  97         NULL, *wbio = NULL;
  98     EVP_CIPHER_CTX *ctx = NULL;
  99     const EVP_CIPHER *cipher = NULL, *c;
 100     const EVP_MD *dgst = NULL;
 101     char *hkey = NULL, *hiv = NULL, *hsalt = NULL, *p;
 102     char *infile = NULL, *outfile = NULL, *prog;
 103     char *str = NULL, *passarg = NULL, *pass = NULL, *strbuf = NULL;
 104     char mbuf[sizeof(magic) - 1];
 105     OPTION_CHOICE o;
 106     int bsize = BSIZE, verbose = 0, debug = 0, olb64 = 0, nosalt = 0;
 107     int enc = 1, printkey = 0, i, k;
 108     int base64 = 0, informat = FORMAT_BINARY, outformat = FORMAT_BINARY;
 109     int ret = 1, inl, nopad = 0;
 110     unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
 111     unsigned char *buff = NULL, salt[PKCS5_SALT_LEN];
 112     int pbkdf2 = 0;
 113     int iter = 0;
 114     long n;
 115     struct doall_enc_ciphers dec;
 116 #ifdef ZLIB
 117     int do_zlib = 0;
 118     BIO *bzl = NULL;
 119 #endif
 120
 121     /* first check the program name */
 122     prog = opt_progname(argv[0]);
 123     if (strcmp(prog, "base64") == 0) {
 124         base64 = 1;
 125 #ifdef ZLIB
 126     } else if (strcmp(prog, "zlib") == 0) {
 127         do_zlib = 1;
 128 #endif
 129     } else {
 130         cipher = EVP_get_cipherbyname(prog);
 131         if (cipher == NULL && strcmp(prog, "enc") != 0) {
 132             BIO_printf(bio_err, "%s is not a known cipher\n", prog);
 133             goto end;
 134         }
 135     }
 136
 137     prog = opt_init(argc, argv, enc_options);
 138     while ((o = opt_next()) != OPT_EOF) {
 139         switch (o) {
 140         case OPT_EOF:
 141         case OPT_ERR:
 142  opthelp:
 143             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 144             goto end;
 145         case OPT_HELP:
 146             opt_help(enc_options);
 147             ret = 0;
 148             goto end;
 149         case OPT_LIST:
 150             BIO_printf(bio_out, "Supported ciphers:\n");
 151             dec.bio = bio_out;
 152             dec.n = 0;
 153             OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
 154                                    show_ciphers, &dec);
 155             BIO_printf(bio_out, "\n");
 156             ret = 0;
 157             goto end;
 158         case OPT_E:
 159             enc = 1;
 160             break;
 161         case OPT_IN:
 162             infile = opt_arg();
 163             break;
 164         case OPT_OUT:
 165             outfile = opt_arg();
 166             break;
 167         case OPT_PASS:
 168             passarg = opt_arg();
 169             break;
 170         case OPT_ENGINE:
 171             e = setup_engine(opt_arg(), 0);
 172             break;
 173         case OPT_D:
 174             enc = 0;
 175             break;
 176         case OPT_P:
 177             printkey = 1;
 178             break;
 179         case OPT_V:
 180             verbose = 1;
 181             break;
 182         case OPT_NOPAD:
 183             nopad = 1;
 184             break;
 185         case OPT_SALT:
 186             nosalt = 0;
 187             break;
 188         case OPT_NOSALT:
 189             nosalt = 1;
 190             break;
 191         case OPT_DEBUG:
 192             debug = 1;
 193             break;
 194         case OPT_UPPER_P:
 195             printkey = 2;
 196             break;
 197         case OPT_UPPER_A:
 198             olb64 = 1;
 199             break;
 200         case OPT_A:
 201             base64 = 1;
 202             break;
 203         case OPT_Z:
 204 #ifdef ZLIB
 205             do_zlib = 1;
 206 #endif
 207             break;
 208         case OPT_BUFSIZE:
 209             p = opt_arg();
 210             i = (int)strlen(p) - 1;
 211             k = i >= 1 && p[i] == 'k';
 212             if (k)
 213                 p[i] = '\0';
 214             if (!opt_long(opt_arg(), &n)
 215                     || n < 0 || (k && n >= LONG_MAX / 1024))
 216                 goto opthelp;
 217             if (k)
 218                 n *= 1024;
 219             bsize = (int)n;
 220             break;
 221         case OPT_K:
 222             str = opt_arg();
 223             break;
 224         case OPT_KFILE:
 225             in = bio_open_default(opt_arg(), 'r', FORMAT_TEXT);
 226             if (in == NULL)
 227                 goto opthelp;
 228             i = BIO_gets(in, buf, sizeof(buf));
 229             BIO_free(in);
 230             in = NULL;
 231             if (i <= 0) {
 232                 BIO_printf(bio_err,
 233                            "%s Can't read key from %s\n", prog, opt_arg());
 234                 goto opthelp;
 235             }
 236             while (--i > 0 && (buf[i] == '\r' || buf[i] == '\n'))
 237                 buf[i] = '\0';
 238             if (i <= 0) {
 239                 BIO_printf(bio_err, "%s: zero length password\n", prog);
 240                 goto opthelp;
 241             }
 242             str = buf;
 243             break;
 244         case OPT_UPPER_K:
 245             hkey = opt_arg();
 246             break;
 247         case OPT_UPPER_S:
 248             hsalt = opt_arg();
 249             break;
 250         case OPT_IV:
 251             hiv = opt_arg();
 252             break;
 253         case OPT_MD:
 254             if (!opt_md(opt_arg(), &dgst))
 255                 goto opthelp;
 256             break;
 257         case OPT_CIPHER:
 258             if (!opt_cipher(opt_unknown(), &c))
 259                 goto opthelp;
 260             cipher = c;
 261             break;
 262         case OPT_ITER:
 263             if (!opt_int(opt_arg(), &iter))
 264                 goto opthelp;
 265             pbkdf2 = 1;
 266             break;
 267         case OPT_PBKDF2:
 268             pbkdf2 = 1;
 269             if (iter == 0)    /* do not overwrite a chosen value */
 270                 iter = 10000;
 271             break;
 272         case OPT_NONE:
 273             cipher = NULL;
 274             break;
 275         case OPT_R_CASES:
 276             if (!opt_rand(o))
 277                 goto end;
 278             break;
 279         }
 280     }
 281     if (opt_num_rest() != 0) {
 282         BIO_printf(bio_err, "Extra arguments given.\n");
 283         goto opthelp;
 284     }
 285
 286     if (cipher && EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) {
 287         BIO_printf(bio_err, "%s: AEAD ciphers not supported\n", prog);
 288         goto end;
 289     }
 290
 291     if (cipher && (EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE)) {
 292         BIO_printf(bio_err, "%s XTS ciphers not supported\n", prog);
 293         goto end;
 294     }
 295
 296     if (dgst == NULL)
 297         dgst = EVP_sha256();
 298
 299     if (iter == 0)
 300         iter = 1;
 301
 302     /* It must be large enough for a base64 encoded line */
 303     if (base64 && bsize < 80)
 304         bsize = 80;
 305     if (verbose)
 306         BIO_printf(bio_err, "bufsize=%d\n", bsize);
 307
 308 #ifdef ZLIB
 309     if (!do_zlib)
 310 #endif
 311         if (base64) {
 312             if (enc)
 313                 outformat = FORMAT_BASE64;
 314             else
 315                 informat = FORMAT_BASE64;
 316         }
 317
 318     strbuf = app_malloc(SIZE, "strbuf");
 319     buff = app_malloc(EVP_ENCODE_LENGTH(bsize), "evp buffer");
 320
 321     if (infile == NULL) {
 322         in = dup_bio_in(informat);
 323     } else {
 324         in = bio_open_default(infile, 'r', informat);
 325     }
 326     if (in == NULL)
 327         goto end;
 328
 329     if (str == NULL && passarg != NULL) {
 330         if (!app_passwd(passarg, NULL, &pass, NULL)) {
 331             BIO_printf(bio_err, "Error getting password\n");
 332             goto end;
 333         }
 334         str = pass;
 335     }
 336
 337     if ((str == NULL) && (cipher != NULL) && (hkey == NULL)) {
 338         if (1) {
 339 #ifndef OPENSSL_NO_UI_CONSOLE
 340             for (;;) {
 341                 char prompt[200];
 342
 343                 BIO_snprintf(prompt, sizeof(prompt), "enter %s %s password:",
 344                         OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
 345                         (enc) ? "encryption" : "decryption");
 346                 strbuf[0] = '\0';
 347                 i = EVP_read_pw_string((char *)strbuf, SIZE, prompt, enc);
 348                 if (i == 0) {
 349                     if (strbuf[0] == '\0') {
 350                         ret = 1;
 351                         goto end;
 352                     }
 353                     str = strbuf;
 354                     break;
 355                 }
 356                 if (i < 0) {
 357                     BIO_printf(bio_err, "bad password read\n");
 358                     goto end;
 359                 }
 360             }
 361         } else {
 362 #endif
 363             BIO_printf(bio_err, "password required\n");
 364             goto end;
 365         }
 366     }
 367
 368     out = bio_open_default(outfile, 'w', outformat);
 369     if (out == NULL)
 370         goto end;
 371
 372     if (debug) {
 373         BIO_set_callback(in, BIO_debug_callback);
 374         BIO_set_callback(out, BIO_debug_callback);
 375         BIO_set_callback_arg(in, (char *)bio_err);
 376         BIO_set_callback_arg(out, (char *)bio_err);
 377     }
 378
 379     rbio = in;
 380     wbio = out;
 381
 382 #ifdef ZLIB
 383     if (do_zlib) {
 384         if ((bzl = BIO_new(BIO_f_zlib())) == NULL)
 385             goto end;
 386         if (debug) {
 387             BIO_set_callback(bzl, BIO_debug_callback);
 388             BIO_set_callback_arg(bzl, (char *)bio_err);
 389         }
 390         if (enc)
 391             wbio = BIO_push(bzl, wbio);
 392         else
 393             rbio = BIO_push(bzl, rbio);
 394     }
 395 #endif
 396
 397     if (base64) {
 398         if ((b64 = BIO_new(BIO_f_base64())) == NULL)
 399             goto end;
 400         if (debug) {
 401             BIO_set_callback(b64, BIO_debug_callback);
 402             BIO_set_callback_arg(b64, (char *)bio_err);
 403         }
 404         if (olb64)
 405             BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
 406         if (enc)
 407             wbio = BIO_push(b64, wbio);
 408         else
 409             rbio = BIO_push(b64, rbio);
 410     }
 411
 412     if (cipher != NULL) {
 413         /*
 414          * Note that str is NULL if a key was passed on the command line, so
 415          * we get no salt in that case. Is this a bug?
 416          */
 417         if (str != NULL) {
 418             /*
 419              * Salt handling: if encrypting generate a salt and write to
 420              * output BIO. If decrypting read salt from input BIO.
 421              */
 422             unsigned char *sptr;
 423             size_t str_len = strlen(str);
 424
 425             if (nosalt) {
 426                 sptr = NULL;
 427             } else {
 428                 if (enc) {
 429                     if (hsalt) {
 430                         if (!set_hex(hsalt, salt, sizeof(salt))) {
 431                             BIO_printf(bio_err, "invalid hex salt value\n");
 432                             goto end;
 433                         }
 434                     } else if (RAND_bytes(salt, sizeof(salt)) <= 0) {
 435                         goto end;
 436                     }
 437                     /*
 438                      * If -P option then don't bother writing
 439                      */
 440                     if ((printkey != 2)
 441                         && (BIO_write(wbio, magic,
 442                                       sizeof(magic) - 1) != sizeof(magic) - 1
 443                             || BIO_write(wbio,
 444                                          (char *)salt,
 445                                          sizeof(salt)) != sizeof(salt))) {
 446                         BIO_printf(bio_err, "error writing output file\n");
 447                         goto end;
 448                     }
 449                 } else if (BIO_read(rbio, mbuf, sizeof(mbuf)) != sizeof(mbuf)
 450                            || BIO_read(rbio,
 451                                        (unsigned char *)salt,
 452                                        sizeof(salt)) != sizeof(salt)) {
 453                     BIO_printf(bio_err, "error reading input file\n");
 454                     goto end;
 455                 } else if (memcmp(mbuf, magic, sizeof(magic) - 1)) {
 456                     BIO_printf(bio_err, "bad magic number\n");
 457                     goto end;
 458                 }
 459                 sptr = salt;
 460             }
 461
 462             if (pbkdf2 == 1) {
 463                 /*
 464                 * derive key and default iv
 465                 * concatenated into a temporary buffer
 466                 */
 467                 unsigned char tmpkeyiv[EVP_MAX_KEY_LENGTH + EVP_MAX_IV_LENGTH];
 468                 int iklen = EVP_CIPHER_key_length(cipher);
 469                 int ivlen = EVP_CIPHER_iv_length(cipher);
 470                 /* not needed if HASH_UPDATE() is fixed : */
 471                 int islen = (sptr != NULL ? sizeof(salt) : 0);
 472                 if (!PKCS5_PBKDF2_HMAC(str, str_len, sptr, islen,
 473                                        iter, dgst, iklen+ivlen, tmpkeyiv)) {
 474                     BIO_printf(bio_err, "PKCS5_PBKDF2_HMAC failed\n");
 475                     goto end;
 476                 }
 477                 /* split and move data back to global buffer */
 478                 memcpy(key, tmpkeyiv, iklen);
 479                 memcpy(iv, tmpkeyiv+iklen, ivlen);
 480             } else {
 481                 BIO_printf(bio_err, "*** WARNING : "
 482                                     "deprecated key derivation used.\n"
 483                                     "Using -iter or -pbkdf2 would be better.\n");
 484                 if (!EVP_BytesToKey(cipher, dgst, sptr,
 485                                     (unsigned char *)str, str_len,
 486                                     1, key, iv)) {
 487                     BIO_printf(bio_err, "EVP_BytesToKey failed\n");
 488                     goto end;
 489                 }
 490             }
 491             /*
 492              * zero the complete buffer or the string passed from the command
 493              * line.
 494              */
 495             if (str == strbuf)
 496                 OPENSSL_cleanse(str, SIZE);
 497             else
 498                 OPENSSL_cleanse(str, str_len);
 499         }
 500         if (hiv != NULL) {
 501             int siz = EVP_CIPHER_iv_length(cipher);
 502             if (siz == 0) {
 503                 BIO_printf(bio_err, "warning: iv not used by this cipher\n");
 504             } else if (!set_hex(hiv, iv, siz)) {
 505                 BIO_printf(bio_err, "invalid hex iv value\n");
 506                 goto end;
 507             }
 508         }
 509         if ((hiv == NULL) && (str == NULL)
 510             && EVP_CIPHER_iv_length(cipher) != 0) {
 511             /*
 512              * No IV was explicitly set and no IV was generated.
 513              * Hence the IV is undefined, making correct decryption impossible.
 514              */
 515             BIO_printf(bio_err, "iv undefined\n");
 516             goto end;
 517         }
 518         if (hkey != NULL) {
 519             if (!set_hex(hkey, key, EVP_CIPHER_key_length(cipher))) {
 520                 BIO_printf(bio_err, "invalid hex key value\n");
 521                 goto end;
 522             }
 523             /* wiping secret data as we no longer need it */
 524             OPENSSL_cleanse(hkey, strlen(hkey));
 525         }
 526
 527         if ((benc = BIO_new(BIO_f_cipher())) == NULL)
 528             goto end;
 529
 530         /*
 531          * Since we may be changing parameters work on the encryption context
 532          * rather than calling BIO_set_cipher().
 533          */
 534
 535         BIO_get_cipher_ctx(benc, &ctx);
 536
 537         if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc)) {
 538             BIO_printf(bio_err, "Error setting cipher %s\n",
 539                        EVP_CIPHER_name(cipher));
 540             ERR_print_errors(bio_err);
 541             goto end;
 542         }
 543
 544         if (nopad)
 545             EVP_CIPHER_CTX_set_padding(ctx, 0);
 546
 547         if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc)) {
 548             BIO_printf(bio_err, "Error setting cipher %s\n",
 549                        EVP_CIPHER_name(cipher));
 550             ERR_print_errors(bio_err);
 551             goto end;
 552         }
 553
 554         if (debug) {
 555             BIO_set_callback(benc, BIO_debug_callback);
 556             BIO_set_callback_arg(benc, (char *)bio_err);
 557         }
 558
 559         if (printkey) {
 560             if (!nosalt) {
 561                 printf("salt=");
 562                 for (i = 0; i < (int)sizeof(salt); i++)
 563                     printf("%02X", salt[i]);
 564                 printf("\n");
 565             }
 566             if (EVP_CIPHER_key_length(cipher) > 0) {
 567                 printf("key=");
 568                 for (i = 0; i < EVP_CIPHER_key_length(cipher); i++)
 569                     printf("%02X", key[i]);
 570                 printf("\n");
 571             }
 572             if (EVP_CIPHER_iv_length(cipher) > 0) {
 573                 printf("iv =");
 574                 for (i = 0; i < EVP_CIPHER_iv_length(cipher); i++)
 575                     printf("%02X", iv[i]);
 576                 printf("\n");
 577             }
 578             if (printkey == 2) {
 579                 ret = 0;
 580                 goto end;
 581             }
 582         }
 583     }
 584
 585     /* Only encrypt/decrypt as we write the file */
 586     if (benc != NULL)
 587         wbio = BIO_push(benc, wbio);
 588
 589     for (;;) {
 590         inl = BIO_read(rbio, (char *)buff, bsize);
 591         if (inl <= 0)
 592             break;
 593         if (BIO_write(wbio, (char *)buff, inl) != inl) {
 594             BIO_printf(bio_err, "error writing output file\n");
 595             goto end;
 596         }
 597     }
 598     if (!BIO_flush(wbio)) {
 599         BIO_printf(bio_err, "bad decrypt\n");
 600         goto end;
 601     }
 602
 603     ret = 0;
 604     if (verbose) {
 605         BIO_printf(bio_err, "bytes read   : %8ju\n", BIO_number_read(in));
 606         BIO_printf(bio_err, "bytes written: %8ju\n", BIO_number_written(out));
 607     }
 608  end:
 609     ERR_print_errors(bio_err);
 610     OPENSSL_free(strbuf);
 611     OPENSSL_free(buff);
 612     BIO_free(in);
 613     BIO_free_all(out);
 614     BIO_free(benc);
 615     BIO_free(b64);
 616 #ifdef ZLIB
 617     BIO_free(bzl);
 618 #endif
 619     release_engine(e);
 620     OPENSSL_free(pass);
 621     return ret;
 622 }
 623
 624 static void show_ciphers(const OBJ_NAME *name, void *arg)
 625 {
 626     struct doall_enc_ciphers *dec = (struct doall_enc_ciphers *)arg;
 627     const EVP_CIPHER *cipher;
 628
 629     if (!islower((unsigned char)*name->name))
 630         return;
 631
 632     /* Filter out ciphers that we cannot use */
 633     cipher = EVP_get_cipherbyname(name->name);
 634     if (cipher == NULL ||
 635             (EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) != 0 ||
 636             EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE)
 637         return;
 638
 639     BIO_printf(dec->bio, "-%-25s", name->name);
 640     if (++dec->n == 3) {
 641         BIO_printf(dec->bio, "\n");
 642         dec->n = 0;
 643     } else
 644         BIO_printf(dec->bio, " ");
 645 }
 646
 647 static int set_hex(const char *in, unsigned char *out, int size)
 648 {
 649     int i, n;
 650     unsigned char j;
 651
 652     i = size * 2;
 653     n = strlen(in);
 654     if (n > i) {
 655         BIO_printf(bio_err, "hex string is too long, ignoring excess\n");
 656         n = i; /* ignore exceeding part */
 657     } else if (n < i) {
 658         BIO_printf(bio_err, "hex string is too short, padding with zero bytes to length\n");
 659     }
 660
 661     memset(out, 0, size);
 662     for (i = 0; i < n; i++) {
 663         j = (unsigned char)*in++;
 664         if (!isxdigit(j)) {
 665             BIO_printf(bio_err, "non-hex digit\n");
 666             return 0;
 667         }
 668         j = (unsigned char)OPENSSL_hexchar2int(j);
 669         if (i & 1)
 670             out[i / 2] |= j;
 671         else
 672             out[i / 2] = (j << 4);
 673     }
 674     return 1;
 675 }