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