apps/enc.c

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57
  58 #include <stdio.h>
  59 #include <stdlib.h>
  60 #include <string.h>
  61 #include <limits.h>
  62 #include "apps.h"
  63 #include <openssl/bio.h>
  64 #include <openssl/err.h>
  65 #include <openssl/evp.h>
  66 #include <openssl/objects.h>
  67 #include <openssl/x509.h>
  68 #include <openssl/rand.h>
  69 #include <openssl/pem.h>
  70 #ifndef OPENSSL_NO_COMP
  71 # include <openssl/comp.h>
  72 #endif
  73 #include <ctype.h>
  74
  75 #undef SIZE
  76 #undef BSIZE
  77 #define SIZE    (512)
  78 #define BSIZE   (8*1024)
  79
  80 static int set_hex(char *in, unsigned char *out, int size);
  81 static void show_ciphers(const OBJ_NAME *name, void *bio_);
  82
  83 typedef enum OPTION_choice {
  84     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  85     OPT_E, OPT_IN, OPT_OUT, OPT_PASS, OPT_ENGINE, OPT_D, OPT_P, OPT_V,
  86     OPT_NOPAD, OPT_SALT, OPT_NOSALT, OPT_DEBUG, OPT_UPPER_P, OPT_UPPER_A,
  87     OPT_A, OPT_Z, OPT_BUFSIZE, OPT_K, OPT_KFILE, OPT_UPPER_K, OPT_NONE,
  88     OPT_UPPER_S, OPT_IV, OPT_MD, OPT_CIPHER
  89 } OPTION_CHOICE;
  90
  91 OPTIONS enc_options[] = {
  92     {"help", OPT_HELP, '-', "Display this summary"},
  93     {"in", OPT_IN, '<', "Input file"},
  94     {"out", OPT_OUT, '>', "Output file"},
  95     {"pass", OPT_PASS, 's', "Passphrase source"},
  96     {"e", OPT_E, '-', "Encrypt"},
  97     {"d", OPT_D, '-', "Decrypt"},
  98     {"p", OPT_P, '-', "Print the iv/key"},
  99     {"P", OPT_UPPER_P, '-', "Print the iv/key and exit"},
 100     {"v", OPT_V, '-', "Verbose output"},
 101     {"nopad", OPT_NOPAD, '-', "Disable standard block padding"},
 102     {"salt", OPT_SALT, '-', "Use salt in the KDF (default)"},
 103     {"nosalt", OPT_NOSALT, '-', "Do not use salt in the KDF"},
 104     {"debug", OPT_DEBUG, '-', "Print debug info"},
 105     {"a", OPT_A, '-', "Base64 encode/decode, depending on encryption flag"},
 106     {"base64", OPT_A, '-', "Same as option -a"},
 107     {"A", OPT_UPPER_A, '-',
 108      "Used with -[base64|a] to specify base64 buffer as a single line"},
 109     {"bufsize", OPT_BUFSIZE, 's', "Buffer size"},
 110     {"k", OPT_K, 's', "Passphrase"},
 111     {"kfile", OPT_KFILE, '<', "Fead passphrase from file"},
 112     {"K", OPT_UPPER_K, 's', "Raw key, in hex"},
 113     {"S", OPT_UPPER_S, 's', "Salt, in hex"},
 114     {"iv", OPT_IV, 's', "IV in hex"},
 115     {"md", OPT_MD, 's', "Use specified digest to create key from passphrase"},
 116     {"none", OPT_NONE, '-', "Don't encrypt"},
 117     {"", OPT_CIPHER, '-', "Any supported cipher"},
 118 #ifdef ZLIB
 119     {"z", OPT_Z, '-', "Use zlib as the 'encryption'"},
 120 #endif
 121 #ifndef OPENSSL_NO_ENGINE
 122     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
 123 #endif
 124     {NULL}
 125 };
 126
 127 int enc_main(int argc, char **argv)
 128 {
 129     static char buf[128];
 130     static const char magic[] = "Salted__";
 131     BIO *in = NULL, *out = NULL, *b64 = NULL, *benc = NULL, *rbio =
 132         NULL, *wbio = NULL;
 133     EVP_CIPHER_CTX *ctx = NULL;
 134     const EVP_CIPHER *cipher = NULL, *c;
 135     const EVP_MD *dgst = NULL;
 136     char *hkey = NULL, *hiv = NULL, *hsalt = NULL, *p;
 137     char *infile = NULL, *outfile = NULL, *prog;
 138     char *str = NULL, *passarg = NULL, *pass = NULL, *strbuf = NULL;
 139     char mbuf[sizeof magic - 1];
 140     OPTION_CHOICE o;
 141     int bsize = BSIZE, verbose = 0, debug = 0, olb64 = 0, nosalt = 0;
 142     int enc = 1, printkey = 0, i, k;
 143     int base64 = 0, informat = FORMAT_BINARY, outformat = FORMAT_BINARY;
 144     int ret = 1, inl, nopad = 0;
 145     unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
 146     unsigned char *buff = NULL, salt[PKCS5_SALT_LEN];
 147     long n;
 148 #ifdef ZLIB
 149     int do_zlib = 0;
 150     BIO *bzl = NULL;
 151 #endif
 152
 153     /* first check the program name */
 154     prog = opt_progname(argv[0]);
 155     if (strcmp(prog, "base64") == 0)
 156         base64 = 1;
 157 #ifdef ZLIB
 158     else if (strcmp(prog, "zlib") == 0)
 159         do_zlib = 1;
 160 #endif
 161     else {
 162         cipher = EVP_get_cipherbyname(prog);
 163         if (cipher == NULL && strcmp(prog, "enc") != 0) {
 164             BIO_printf(bio_err, "%s is not a known cipher\n", prog);
 165             goto end;
 166         }
 167     }
 168
 169     prog = opt_init(argc, argv, enc_options);
 170     while ((o = opt_next()) != OPT_EOF) {
 171         switch (o) {
 172         case OPT_EOF:
 173         case OPT_ERR:
 174  opthelp:
 175             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 176             goto end;
 177         case OPT_HELP:
 178             opt_help(enc_options);
 179             ret = 0;
 180             BIO_printf(bio_err, "Cipher Types\n");
 181             OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
 182                                    show_ciphers, bio_err);
 183             BIO_printf(bio_err, "\n");
 184             goto end;
 185         case OPT_E:
 186             enc = 1;
 187             break;
 188         case OPT_IN:
 189             infile = opt_arg();
 190             break;
 191         case OPT_OUT:
 192             outfile = opt_arg();
 193             break;
 194         case OPT_PASS:
 195             passarg = opt_arg();
 196             break;
 197         case OPT_ENGINE:
 198             (void)setup_engine(opt_arg(), 0);
 199             break;
 200         case OPT_D:
 201             enc = 0;
 202             break;
 203         case OPT_P:
 204             printkey = 1;
 205             break;
 206         case OPT_V:
 207             verbose = 1;
 208             break;
 209         case OPT_NOPAD:
 210             nopad = 1;
 211             break;
 212         case OPT_SALT:
 213             nosalt = 0;
 214             break;
 215         case OPT_NOSALT:
 216             nosalt = 1;
 217             break;
 218         case OPT_DEBUG:
 219             debug = 1;
 220             break;
 221         case OPT_UPPER_P:
 222             printkey = 2;
 223             break;
 224         case OPT_UPPER_A:
 225             olb64 = 1;
 226             break;
 227         case OPT_A:
 228             base64 = 1;
 229             break;
 230         case OPT_Z:
 231 #ifdef ZLIB
 232             do_zlib = 1;
 233 #endif
 234             break;
 235         case OPT_BUFSIZE:
 236             p = opt_arg();
 237             i = (int)strlen(p) - 1;
 238             k = i >= 1 && p[i] == 'k';
 239             if (k)
 240                 p[i] = '\0';
 241             if (!opt_long(opt_arg(), &n)
 242                     || n < 0 || (k && n >= LONG_MAX / 1024))
 243                 goto opthelp;
 244             if (k)
 245                 n *= 1024;
 246             bsize = (int)n;
 247             break;
 248         case OPT_K:
 249             str = opt_arg();
 250             break;
 251         case OPT_KFILE:
 252             in = bio_open_default(opt_arg(), 'r', FORMAT_TEXT);
 253             if (in == NULL)
 254                 goto opthelp;
 255             i = BIO_gets(in, buf, sizeof buf);
 256             BIO_free(in);
 257             in = NULL;
 258             if (i <= 0) {
 259                 BIO_printf(bio_err,
 260                            "%s Can't read key from %s\n", prog, opt_arg());
 261                 goto opthelp;
 262             }
 263             while (--i > 0 && (buf[i] == '\r' || buf[i] == '\n'))
 264                 buf[i] = '\0';
 265             if (i <= 0) {
 266                 BIO_printf(bio_err, "%s: zero length password\n", prog);
 267                 goto opthelp;
 268             }
 269             str = buf;
 270             break;
 271         case OPT_UPPER_K:
 272             hkey = opt_arg();
 273             break;
 274         case OPT_UPPER_S:
 275             hsalt = opt_arg();
 276             break;
 277         case OPT_IV:
 278             hiv = opt_arg();
 279             break;
 280         case OPT_MD:
 281             if (!opt_md(opt_arg(), &dgst))
 282                 goto opthelp;
 283             break;
 284         case OPT_CIPHER:
 285             if (!opt_cipher(opt_unknown(), &c))
 286                 goto opthelp;
 287             cipher = c;
 288             break;
 289         case OPT_NONE:
 290             cipher = NULL;
 291             break;
 292         }
 293     }
 294     argc = opt_num_rest();
 295     argv = opt_rest();
 296
 297     if (cipher && EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) {
 298         BIO_printf(bio_err, "%s: AEAD ciphers not supported\n", prog);
 299         goto end;
 300     }
 301
 302     if (cipher && (EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE)) {
 303         BIO_printf(bio_err, "%s XTS ciphers not supported\n", prog);
 304         goto end;
 305     }
 306
 307     if (dgst == NULL)
 308         dgst = EVP_sha256();
 309
 310     /* It must be large enough for a base64 encoded line */
 311     if (base64 && bsize < 80)
 312         bsize = 80;
 313     if (verbose)
 314         BIO_printf(bio_err, "bufsize=%d\n", bsize);
 315
 316 #ifdef ZLIB
 317     if (!do_zlib)
 318 #endif
 319         if (base64) {
 320             if (enc)
 321                 outformat = FORMAT_BASE64;
 322             else
 323                 informat = FORMAT_BASE64;
 324         }
 325
 326     strbuf = app_malloc(SIZE, "strbuf");
 327     buff = app_malloc(EVP_ENCODE_LENGTH(bsize), "evp buffer");
 328
 329     if (infile == NULL) {
 330         unbuffer(stdin);
 331         in = dup_bio_in(informat);
 332     } else
 333         in = bio_open_default(infile, 'r', informat);
 334     if (in == NULL)
 335         goto end;
 336
 337     if (!str && passarg) {
 338         if (!app_passwd(passarg, NULL, &pass, NULL)) {
 339             BIO_printf(bio_err, "Error getting password\n");
 340             goto end;
 341         }
 342         str = pass;
 343     }
 344
 345     if ((str == NULL) && (cipher != NULL) && (hkey == NULL)) {
 346         if (1) {
 347 #ifndef OPENSSL_NO_UI
 348             for (;;) {
 349                 char prompt[200];
 350
 351                 BIO_snprintf(prompt, sizeof prompt, "enter %s %s password:",
 352                              OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
 353                              (enc) ? "encryption" : "decryption");
 354                 strbuf[0] = '\0';
 355                 i = EVP_read_pw_string((char *)strbuf, SIZE, prompt, enc);
 356                 if (i == 0) {
 357                     if (strbuf[0] == '\0') {
 358                         ret = 1;
 359                         goto end;
 360                     }
 361                     str = strbuf;
 362                     break;
 363                 }
 364                 if (i < 0) {
 365                     BIO_printf(bio_err, "bad password read\n");
 366                     goto end;
 367                 }
 368             }
 369         } else {
 370 #endif
 371             BIO_printf(bio_err, "password required\n");
 372             goto end;
 373         }
 374     }
 375
 376     out = bio_open_default(outfile, 'w', outformat);
 377     if (out == NULL)
 378         goto end;
 379
 380     if (debug) {
 381         BIO_set_callback(in, BIO_debug_callback);
 382         BIO_set_callback(out, BIO_debug_callback);
 383         BIO_set_callback_arg(in, (char *)bio_err);
 384         BIO_set_callback_arg(out, (char *)bio_err);
 385     }
 386
 387     rbio = in;
 388     wbio = out;
 389
 390 #ifdef ZLIB
 391     if (do_zlib) {
 392         if ((bzl = BIO_new(BIO_f_zlib())) == NULL)
 393             goto end;
 394         if (debug) {
 395             BIO_set_callback(bzl, BIO_debug_callback);
 396             BIO_set_callback_arg(bzl, (char *)bio_err);
 397         }
 398         if (enc)
 399             wbio = BIO_push(bzl, wbio);
 400         else
 401             rbio = BIO_push(bzl, rbio);
 402     }
 403 #endif
 404
 405     if (base64) {
 406         if ((b64 = BIO_new(BIO_f_base64())) == NULL)
 407             goto end;
 408         if (debug) {
 409             BIO_set_callback(b64, BIO_debug_callback);
 410             BIO_set_callback_arg(b64, (char *)bio_err);
 411         }
 412         if (olb64)
 413             BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
 414         if (enc)
 415             wbio = BIO_push(b64, wbio);
 416         else
 417             rbio = BIO_push(b64, rbio);
 418     }
 419
 420     if (cipher != NULL) {
 421         /*
 422          * Note that str is NULL if a key was passed on the command line, so
 423          * we get no salt in that case. Is this a bug?
 424          */
 425         if (str != NULL) {
 426             /*
 427              * Salt handling: if encrypting generate a salt and write to
 428              * output BIO. If decrypting read salt from input BIO.
 429              */
 430             unsigned char *sptr;
 431             if (nosalt)
 432                 sptr = NULL;
 433             else {
 434                 if (enc) {
 435                     if (hsalt) {
 436                         if (!set_hex(hsalt, salt, sizeof salt)) {
 437                             BIO_printf(bio_err, "invalid hex salt value\n");
 438                             goto end;
 439                         }
 440                     } else if (RAND_bytes(salt, sizeof salt) <= 0)
 441                         goto end;
 442                     /*
 443                      * If -P option then don't bother writing
 444                      */
 445                     if ((printkey != 2)
 446                         && (BIO_write(wbio, magic,
 447                                       sizeof magic - 1) != sizeof magic - 1
 448                             || BIO_write(wbio,
 449                                          (char *)salt,
 450                                          sizeof salt) != sizeof salt)) {
 451                         BIO_printf(bio_err, "error writing output file\n");
 452                         goto end;
 453                     }
 454                 } else if (BIO_read(rbio, mbuf, sizeof mbuf) != sizeof mbuf
 455                            || BIO_read(rbio,
 456                                        (unsigned char *)salt,
 457                                        sizeof salt) != sizeof salt) {
 458                     BIO_printf(bio_err, "error reading input file\n");
 459                     goto end;
 460                 } else if (memcmp(mbuf, magic, sizeof magic - 1)) {
 461                     BIO_printf(bio_err, "bad magic number\n");
 462                     goto end;
 463                 }
 464
 465                 sptr = salt;
 466             }
 467
 468             if (!EVP_BytesToKey(cipher, dgst, sptr,
 469                                 (unsigned char *)str,
 470                                 strlen(str), 1, key, iv)) {
 471                 BIO_printf(bio_err, "EVP_BytesToKey failed\n");
 472                 goto end;
 473             }
 474             /*
 475              * zero the complete buffer or the string passed from the command
 476              * line bug picked up by Larry J. Hughes Jr. <hughes@indiana.edu>
 477              */
 478             if (str == strbuf)
 479                 OPENSSL_cleanse(str, SIZE);
 480             else
 481                 OPENSSL_cleanse(str, strlen(str));
 482         }
 483         if (hiv != NULL) {
 484             int siz = EVP_CIPHER_iv_length(cipher);
 485             if (siz == 0) {
 486                 BIO_printf(bio_err, "warning: iv not use by this cipher\n");
 487             } else if (!set_hex(hiv, iv, sizeof iv)) {
 488                 BIO_printf(bio_err, "invalid hex iv value\n");
 489                 goto end;
 490             }
 491         }
 492         if ((hiv == NULL) && (str == NULL)
 493             && EVP_CIPHER_iv_length(cipher) != 0) {
 494             /*
 495              * No IV was explicitly set and no IV was generated during
 496              * EVP_BytesToKey. Hence the IV is undefined, making correct
 497              * decryption impossible.
 498              */
 499             BIO_printf(bio_err, "iv undefined\n");
 500             goto end;
 501         }
 502         if ((hkey != NULL) && !set_hex(hkey, key, EVP_CIPHER_key_length(cipher))) {
 503             BIO_printf(bio_err, "invalid hex key value\n");
 504             goto end;
 505         }
 506
 507         if ((benc = BIO_new(BIO_f_cipher())) == NULL)
 508             goto end;
 509
 510         /*
 511          * Since we may be changing parameters work on the encryption context
 512          * rather than calling BIO_set_cipher().
 513          */
 514
 515         BIO_get_cipher_ctx(benc, &ctx);
 516
 517         if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc)) {
 518             BIO_printf(bio_err, "Error setting cipher %s\n",
 519                        EVP_CIPHER_name(cipher));
 520             ERR_print_errors(bio_err);
 521             goto end;
 522         }
 523
 524         if (nopad)
 525             EVP_CIPHER_CTX_set_padding(ctx, 0);
 526
 527         if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc)) {
 528             BIO_printf(bio_err, "Error setting cipher %s\n",
 529                        EVP_CIPHER_name(cipher));
 530             ERR_print_errors(bio_err);
 531             goto end;
 532         }
 533
 534         if (debug) {
 535             BIO_set_callback(benc, BIO_debug_callback);
 536             BIO_set_callback_arg(benc, (char *)bio_err);
 537         }
 538
 539         if (printkey) {
 540             if (!nosalt) {
 541                 printf("salt=");
 542                 for (i = 0; i < (int)sizeof(salt); i++)
 543                     printf("%02X", salt[i]);
 544                 printf("\n");
 545             }
 546             if (EVP_CIPHER_key_length(cipher) > 0) {
 547                 printf("key=");
 548                 for (i = 0; i < EVP_CIPHER_key_length(cipher); i++)
 549                     printf("%02X", key[i]);
 550                 printf("\n");
 551             }
 552             if (EVP_CIPHER_iv_length(cipher) > 0) {
 553                 printf("iv =");
 554                 for (i = 0; i < EVP_CIPHER_iv_length(cipher); i++)
 555                     printf("%02X", iv[i]);
 556                 printf("\n");
 557             }
 558             if (printkey == 2) {
 559                 ret = 0;
 560                 goto end;
 561             }
 562         }
 563     }
 564
 565     /* Only encrypt/decrypt as we write the file */
 566     if (benc != NULL)
 567         wbio = BIO_push(benc, wbio);
 568
 569     for (;;) {
 570         inl = BIO_read(rbio, (char *)buff, bsize);
 571         if (inl <= 0)
 572             break;
 573         if (BIO_write(wbio, (char *)buff, inl) != inl) {
 574             BIO_printf(bio_err, "error writing output file\n");
 575             goto end;
 576         }
 577     }
 578     if (!BIO_flush(wbio)) {
 579         BIO_printf(bio_err, "bad decrypt\n");
 580         goto end;
 581     }
 582
 583     ret = 0;
 584     if (verbose) {
 585         BIO_printf(bio_err, "bytes read   :%8"PRIu64"\n", BIO_number_read(in));
 586         BIO_printf(bio_err, "bytes written:%8"PRIu64"\n", BIO_number_written(out));
 587     }
 588  end:
 589     ERR_print_errors(bio_err);
 590     OPENSSL_free(strbuf);
 591     OPENSSL_free(buff);
 592     BIO_free(in);
 593     BIO_free_all(out);
 594     BIO_free(benc);
 595     BIO_free(b64);
 596 #ifdef ZLIB
 597     BIO_free(bzl);
 598 #endif
 599     OPENSSL_free(pass);
 600     return (ret);
 601 }
 602
 603 static void show_ciphers(const OBJ_NAME *name, void *bio_)
 604 {
 605     BIO *bio = bio_;
 606     static int n;
 607
 608     if (!islower((unsigned char)*name->name))
 609         return;
 610
 611     BIO_printf(bio, "-%-25s", name->name);
 612     if (++n == 3) {
 613         BIO_printf(bio, "\n");
 614         n = 0;
 615     } else
 616         BIO_printf(bio, " ");
 617 }
 618
 619 static int set_hex(char *in, unsigned char *out, int size)
 620 {
 621     int i, n;
 622     unsigned char j;
 623
 624     n = strlen(in);
 625     if (n > (size * 2)) {
 626         BIO_printf(bio_err, "hex string is too long\n");
 627         return (0);
 628     }
 629     memset(out, 0, size);
 630     for (i = 0; i < n; i++) {
 631         j = (unsigned char)*in;
 632         *(in++) = '\0';
 633         if (j == 0)
 634             break;
 635         if (!isxdigit(j)) {
 636             BIO_printf(bio_err, "non-hex digit\n");
 637             return (0);
 638         }
 639         j = (unsigned char)OPENSSL_hexchar2int(j);
 640         if (i & 1)
 641             out[i / 2] |= j;
 642         else
 643             out[i / 2] = (j << 4);
 644     }
 645     return (1);
 646 }