apps/pkeyutl.c

   1 /*
   2  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   3  * 2006.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include "apps.h"
  60 #include <string.h>
  61 #include <openssl/err.h>
  62 #include <openssl/pem.h>
  63 #include <openssl/evp.h>
  64
  65 #define KEY_PRIVKEY     1
  66 #define KEY_PUBKEY      2
  67 #define KEY_CERT        3
  68
  69 static EVP_PKEY_CTX *init_ctx(int *pkeysize,
  70                               char *keyfile, int keyform, int key_type,
  71                               char *passinarg, int pkey_op, ENGINE *e);
  72
  73 static int setup_peer(EVP_PKEY_CTX *ctx, int peerform, const char *file);
  74
  75 static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op,
  76                     unsigned char *out, size_t *poutlen,
  77                     unsigned char *in, size_t inlen);
  78
  79 typedef enum OPTION_choice {
  80     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  81     OPT_ENGINE, OPT_IN, OPT_OUT,
  82     OPT_PUBIN, OPT_CERTIN, OPT_ASN1PARSE, OPT_HEXDUMP, OPT_SIGN,
  83     OPT_VERIFY, OPT_VERIFYRECOVER, OPT_REV, OPT_ENCRYPT, OPT_DECRYPT,
  84     OPT_DERIVE, OPT_SIGFILE, OPT_INKEY, OPT_PEERKEY, OPT_PASSIN,
  85     OPT_PEERFORM, OPT_KEYFORM, OPT_PKEYOPT
  86 } OPTION_CHOICE;
  87
  88 OPTIONS pkeyutl_options[] = {
  89     {"help", OPT_HELP, '-', "Display this summary"},
  90     {"in", OPT_IN, '<', "Input file"},
  91     {"out", OPT_OUT, '>', "Output file"},
  92     {"pubin", OPT_PUBIN, '-', "Input is a public key"},
  93     {"certin", OPT_CERTIN, '-', "Input is a cert with a public key"},
  94     {"asn1parse", OPT_ASN1PARSE, '-'},
  95     {"hexdump", OPT_HEXDUMP, '-', "Hex dump output"},
  96     {"sign", OPT_SIGN, '-', "Sign with private key"},
  97     {"verify", OPT_VERIFY, '-', "Verify with public key"},
  98     {"verifyrecover", OPT_VERIFYRECOVER, '-',
  99      "Verify with public key, recover original data"},
 100     {"rev", OPT_REV, '-'},
 101     {"encrypt", OPT_ENCRYPT, '-', "Encrypt with public key"},
 102     {"decrypt", OPT_DECRYPT, '-', "Decrypt with private key"},
 103     {"derive", OPT_DERIVE, '-', "Derive shared secret"},
 104     {"sigfile", OPT_SIGFILE, '<', "Signature file (verify operation only)"},
 105     {"inkey", OPT_INKEY, 's', "Input key"},
 106     {"peerkey", OPT_PEERKEY, 's'},
 107     {"passin", OPT_PASSIN, 's', "Pass phrase source"},
 108     {"peerform", OPT_PEERFORM, 'F'},
 109     {"keyform", OPT_KEYFORM, 'F', "Private key format - default PEM"},
 110     {"pkeyopt", OPT_PKEYOPT, 's', "Public key options as opt:value"},
 111 #ifndef OPENSSL_NO_ENGINE
 112     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
 113 #endif
 114     {NULL}
 115 };
 116
 117 int pkeyutl_main(int argc, char **argv)
 118 {
 119     BIO *in = NULL, *out = NULL;
 120     ENGINE *e = NULL;
 121     EVP_PKEY_CTX *ctx = NULL;
 122     char *infile = NULL, *outfile = NULL, *sigfile = NULL, *passinarg = NULL;
 123     char hexdump = 0, asn1parse = 0, rev = 0, *prog;
 124     unsigned char *buf_in = NULL, *buf_out = NULL, *sig = NULL;
 125     OPTION_CHOICE o;
 126     int buf_inlen = 0, siglen = -1, keyform = FORMAT_PEM, peerform =
 127         FORMAT_PEM;
 128     int keysize = -1, pkey_op = EVP_PKEY_OP_SIGN, key_type = KEY_PRIVKEY;
 129     int ret = 1, rv = -1;
 130     size_t buf_outlen;
 131
 132     prog = opt_init(argc, argv, pkeyutl_options);
 133     while ((o = opt_next()) != OPT_EOF) {
 134         switch (o) {
 135         case OPT_EOF:
 136         case OPT_ERR:
 137  opthelp:
 138             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 139             goto end;
 140         case OPT_HELP:
 141             opt_help(pkeyutl_options);
 142             ret = 0;
 143             goto end;
 144         case OPT_IN:
 145             infile = opt_arg();
 146             break;
 147         case OPT_OUT:
 148             outfile = opt_arg();
 149             break;
 150         case OPT_SIGFILE:
 151             sigfile = opt_arg();
 152             break;
 153         case OPT_INKEY:
 154             ctx = init_ctx(&keysize, opt_arg(), keyform, key_type,
 155                            passinarg, pkey_op, e);
 156             if (ctx == NULL) {
 157                 BIO_puts(bio_err, "%s: Error initializing context\n");
 158                 ERR_print_errors(bio_err);
 159                 goto opthelp;
 160             }
 161             break;
 162         case OPT_PEERKEY:
 163             if (!setup_peer(ctx, peerform, opt_arg()))
 164                 goto opthelp;
 165             break;
 166         case OPT_PASSIN:
 167             passinarg = opt_arg();
 168             break;
 169         case OPT_PEERFORM:
 170             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &peerform))
 171                 goto opthelp;
 172             break;
 173         case OPT_KEYFORM:
 174             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &keyform))
 175                 goto opthelp;
 176             break;
 177         case OPT_ENGINE:
 178             e = setup_engine(opt_arg(), 0);
 179             break;
 180         case OPT_PUBIN:
 181             key_type = KEY_PUBKEY;
 182             break;
 183         case OPT_CERTIN:
 184             key_type = KEY_CERT;
 185             break;
 186         case OPT_ASN1PARSE:
 187             asn1parse = 1;
 188             break;
 189         case OPT_HEXDUMP:
 190             hexdump = 1;
 191             break;
 192         case OPT_SIGN:
 193             pkey_op = EVP_PKEY_OP_SIGN;
 194             break;
 195         case OPT_VERIFY:
 196             pkey_op = EVP_PKEY_OP_VERIFY;
 197             break;
 198         case OPT_VERIFYRECOVER:
 199             pkey_op = EVP_PKEY_OP_VERIFYRECOVER;
 200             break;
 201         case OPT_REV:
 202             rev = 1;
 203         case OPT_ENCRYPT:
 204             pkey_op = EVP_PKEY_OP_ENCRYPT;
 205             break;
 206         case OPT_DECRYPT:
 207             pkey_op = EVP_PKEY_OP_DECRYPT;
 208             break;
 209         case OPT_DERIVE:
 210             pkey_op = EVP_PKEY_OP_DERIVE;
 211             break;
 212         case OPT_PKEYOPT:
 213             if (ctx == NULL) {
 214                 BIO_printf(bio_err,
 215                            "%s: Must have -inkey before -pkeyopt\n", prog);
 216                 goto opthelp;
 217             }
 218             if (pkey_ctrl_string(ctx, opt_arg()) <= 0) {
 219                 BIO_printf(bio_err, "%s: Can't set parameter:\n", prog);
 220                 ERR_print_errors(bio_err);
 221                 goto end;
 222             }
 223             break;
 224         }
 225     }
 226     argc = opt_num_rest();
 227     argv = opt_rest();
 228
 229     if (ctx == NULL)
 230         goto opthelp;
 231
 232     if (!app_load_modules(NULL))
 233         goto end;
 234
 235     if (sigfile && (pkey_op != EVP_PKEY_OP_VERIFY)) {
 236         BIO_printf(bio_err,
 237                    "%s: Signature file specified for non verify\n", prog);
 238         goto end;
 239     }
 240
 241     if (!sigfile && (pkey_op == EVP_PKEY_OP_VERIFY)) {
 242         BIO_printf(bio_err,
 243                    "%s: No signature file specified for verify\n", prog);
 244         goto end;
 245     }
 246
 247 /* FIXME: seed PRNG only if needed */
 248     app_RAND_load_file(NULL, 0);
 249
 250     if (pkey_op != EVP_PKEY_OP_DERIVE) {
 251         in = bio_open_default(infile, "rb");
 252         if (in == NULL)
 253             goto end;
 254     }
 255     out = bio_open_default(outfile, "wb");
 256     if (out == NULL)
 257         goto end;
 258
 259     if (sigfile) {
 260         BIO *sigbio = BIO_new_file(sigfile, "rb");
 261         if (!sigbio) {
 262             BIO_printf(bio_err, "Can't open signature file %s\n", sigfile);
 263             goto end;
 264         }
 265         siglen = bio_to_mem(&sig, keysize * 10, sigbio);
 266         BIO_free(sigbio);
 267         if (siglen <= 0) {
 268             BIO_printf(bio_err, "Error reading signature data\n");
 269             goto end;
 270         }
 271     }
 272
 273     if (in) {
 274         /* Read the input data */
 275         buf_inlen = bio_to_mem(&buf_in, keysize * 10, in);
 276         if (buf_inlen <= 0) {
 277             BIO_printf(bio_err, "Error reading input Data\n");
 278             exit(1);
 279         }
 280         if (rev) {
 281             size_t i;
 282             unsigned char ctmp;
 283             size_t l = (size_t)buf_inlen;
 284             for (i = 0; i < l / 2; i++) {
 285                 ctmp = buf_in[i];
 286                 buf_in[i] = buf_in[l - 1 - i];
 287                 buf_in[l - 1 - i] = ctmp;
 288             }
 289         }
 290     }
 291
 292     if (pkey_op == EVP_PKEY_OP_VERIFY) {
 293         rv = EVP_PKEY_verify(ctx, sig, (size_t)siglen,
 294                              buf_in, (size_t)buf_inlen);
 295         if (rv == 1) {
 296             BIO_puts(out, "Signature Verified Successfully\n");
 297             ret = 0;
 298         } else
 299             BIO_puts(out, "Signature Verification Failure\n");
 300         goto end;
 301     }
 302     rv = do_keyop(ctx, pkey_op, NULL, (size_t *)&buf_outlen,
 303                   buf_in, (size_t)buf_inlen);
 304     if (rv > 0) {
 305         buf_out = app_malloc(buf_outlen, "buffer output");
 306         rv = do_keyop(ctx, pkey_op,
 307                       buf_out, (size_t *)&buf_outlen,
 308                       buf_in, (size_t)buf_inlen);
 309     }
 310     if (rv <= 0) {
 311         ERR_print_errors(bio_err);
 312         goto end;
 313     }
 314     ret = 0;
 315
 316     if (asn1parse) {
 317         if (!ASN1_parse_dump(out, buf_out, buf_outlen, 1, -1))
 318             ERR_print_errors(bio_err);
 319     } else if (hexdump)
 320         BIO_dump(out, (char *)buf_out, buf_outlen);
 321     else
 322         BIO_write(out, buf_out, buf_outlen);
 323
 324  end:
 325     EVP_PKEY_CTX_free(ctx);
 326     BIO_free(in);
 327     BIO_free_all(out);
 328     OPENSSL_free(buf_in);
 329     OPENSSL_free(buf_out);
 330     OPENSSL_free(sig);
 331     return ret;
 332 }
 333
 334 static EVP_PKEY_CTX *init_ctx(int *pkeysize,
 335                               char *keyfile, int keyform, int key_type,
 336                               char *passinarg, int pkey_op, ENGINE *e)
 337 {
 338     EVP_PKEY *pkey = NULL;
 339     EVP_PKEY_CTX *ctx = NULL;
 340     char *passin = NULL;
 341     int rv = -1;
 342     X509 *x;
 343     if (((pkey_op == EVP_PKEY_OP_SIGN) || (pkey_op == EVP_PKEY_OP_DECRYPT)
 344          || (pkey_op == EVP_PKEY_OP_DERIVE))
 345         && (key_type != KEY_PRIVKEY)) {
 346         BIO_printf(bio_err, "A private key is needed for this operation\n");
 347         goto end;
 348     }
 349     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 350         BIO_printf(bio_err, "Error getting password\n");
 351         goto end;
 352     }
 353     switch (key_type) {
 354     case KEY_PRIVKEY:
 355         pkey = load_key(keyfile, keyform, 0, passin, e, "Private Key");
 356         break;
 357
 358     case KEY_PUBKEY:
 359         pkey = load_pubkey(keyfile, keyform, 0, NULL, e, "Public Key");
 360         break;
 361
 362     case KEY_CERT:
 363         x = load_cert(keyfile, keyform, NULL, e, "Certificate");
 364         if (x) {
 365             pkey = X509_get_pubkey(x);
 366             X509_free(x);
 367         }
 368         break;
 369
 370     }
 371
 372     *pkeysize = EVP_PKEY_size(pkey);
 373
 374     if (!pkey)
 375         goto end;
 376
 377     ctx = EVP_PKEY_CTX_new(pkey, e);
 378
 379     EVP_PKEY_free(pkey);
 380
 381     if (!ctx)
 382         goto end;
 383
 384     switch (pkey_op) {
 385     case EVP_PKEY_OP_SIGN:
 386         rv = EVP_PKEY_sign_init(ctx);
 387         break;
 388
 389     case EVP_PKEY_OP_VERIFY:
 390         rv = EVP_PKEY_verify_init(ctx);
 391         break;
 392
 393     case EVP_PKEY_OP_VERIFYRECOVER:
 394         rv = EVP_PKEY_verify_recover_init(ctx);
 395         break;
 396
 397     case EVP_PKEY_OP_ENCRYPT:
 398         rv = EVP_PKEY_encrypt_init(ctx);
 399         break;
 400
 401     case EVP_PKEY_OP_DECRYPT:
 402         rv = EVP_PKEY_decrypt_init(ctx);
 403         break;
 404
 405     case EVP_PKEY_OP_DERIVE:
 406         rv = EVP_PKEY_derive_init(ctx);
 407         break;
 408     }
 409
 410     if (rv <= 0) {
 411         EVP_PKEY_CTX_free(ctx);
 412         ctx = NULL;
 413     }
 414
 415  end:
 416     OPENSSL_free(passin);
 417     return ctx;
 418
 419 }
 420
 421 static int setup_peer(EVP_PKEY_CTX *ctx, int peerform, const char *file)
 422 {
 423     EVP_PKEY *peer = NULL;
 424     int ret;
 425     if (!ctx) {
 426         BIO_puts(bio_err, "-peerkey command before -inkey\n");
 427         return 0;
 428     }
 429
 430     peer = load_pubkey(file, peerform, 0, NULL, NULL, "Peer Key");
 431
 432     if (!peer) {
 433         BIO_printf(bio_err, "Error reading peer key %s\n", file);
 434         ERR_print_errors(bio_err);
 435         return 0;
 436     }
 437
 438     ret = EVP_PKEY_derive_set_peer(ctx, peer);
 439
 440     EVP_PKEY_free(peer);
 441     if (ret <= 0)
 442         ERR_print_errors(bio_err);
 443     return ret;
 444 }
 445
 446 static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op,
 447                     unsigned char *out, size_t *poutlen,
 448                     unsigned char *in, size_t inlen)
 449 {
 450     int rv = 0;
 451     switch (pkey_op) {
 452     case EVP_PKEY_OP_VERIFYRECOVER:
 453         rv = EVP_PKEY_verify_recover(ctx, out, poutlen, in, inlen);
 454         break;
 455
 456     case EVP_PKEY_OP_SIGN:
 457         rv = EVP_PKEY_sign(ctx, out, poutlen, in, inlen);
 458         break;
 459
 460     case EVP_PKEY_OP_ENCRYPT:
 461         rv = EVP_PKEY_encrypt(ctx, out, poutlen, in, inlen);
 462         break;
 463
 464     case EVP_PKEY_OP_DECRYPT:
 465         rv = EVP_PKEY_decrypt(ctx, out, poutlen, in, inlen);
 466         break;
 467
 468     case EVP_PKEY_OP_DERIVE:
 469         rv = EVP_PKEY_derive(ctx, out, poutlen);
 470         break;
 471
 472     }
 473     return rv;
 474 }