apps/pkeyutl.c

   1 /*
   2  * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (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 "apps.h"
  11 #include "progs.h"
  12 #include <string.h>
  13 #include <openssl/err.h>
  14 #include <openssl/pem.h>
  15 #include <openssl/evp.h>
  16
  17 #define KEY_NONE        0
  18 #define KEY_PRIVKEY     1
  19 #define KEY_PUBKEY      2
  20 #define KEY_CERT        3
  21
  22 static EVP_PKEY_CTX *init_ctx(const char *kdfalg, int *pkeysize,
  23                               const char *keyfile, int keyform, int key_type,
  24                               char *passinarg, int pkey_op, ENGINE *e,
  25                               const int impl);
  26
  27 static int setup_peer(EVP_PKEY_CTX *ctx, int peerform, const char *file,
  28                       ENGINE *e);
  29
  30 static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op,
  31                     unsigned char *out, size_t *poutlen,
  32                     const unsigned char *in, size_t inlen);
  33
  34 typedef enum OPTION_choice {
  35     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  36     OPT_ENGINE, OPT_ENGINE_IMPL, OPT_IN, OPT_OUT,
  37     OPT_PUBIN, OPT_CERTIN, OPT_ASN1PARSE, OPT_HEXDUMP, OPT_SIGN,
  38     OPT_VERIFY, OPT_VERIFYRECOVER, OPT_REV, OPT_ENCRYPT, OPT_DECRYPT,
  39     OPT_DERIVE, OPT_SIGFILE, OPT_INKEY, OPT_PEERKEY, OPT_PASSIN,
  40     OPT_PEERFORM, OPT_KEYFORM, OPT_PKEYOPT, OPT_KDF, OPT_KDFLEN,
  41     OPT_R_ENUM
  42 } OPTION_CHOICE;
  43
  44 const OPTIONS pkeyutl_options[] = {
  45     {"help", OPT_HELP, '-', "Display this summary"},
  46     {"in", OPT_IN, '<', "Input file - default stdin"},
  47     {"out", OPT_OUT, '>', "Output file - default stdout"},
  48     {"pubin", OPT_PUBIN, '-', "Input is a public key"},
  49     {"certin", OPT_CERTIN, '-', "Input is a cert with a public key"},
  50     {"asn1parse", OPT_ASN1PARSE, '-', "asn1parse the output data"},
  51     {"hexdump", OPT_HEXDUMP, '-', "Hex dump output"},
  52     {"sign", OPT_SIGN, '-', "Sign input data with private key"},
  53     {"verify", OPT_VERIFY, '-', "Verify with public key"},
  54     {"verifyrecover", OPT_VERIFYRECOVER, '-',
  55      "Verify with public key, recover original data"},
  56     {"rev", OPT_REV, '-', "Reverse the order of the input buffer"},
  57     {"encrypt", OPT_ENCRYPT, '-', "Encrypt input data with public key"},
  58     {"decrypt", OPT_DECRYPT, '-', "Decrypt input data with private key"},
  59     {"derive", OPT_DERIVE, '-', "Derive shared secret"},
  60     {"kdf", OPT_KDF, 's', "Use KDF algorithm"},
  61     {"kdflen", OPT_KDFLEN, 'p', "KDF algorithm output length"},
  62     {"sigfile", OPT_SIGFILE, '<', "Signature file (verify operation only)"},
  63     {"inkey", OPT_INKEY, 's', "Input private key file"},
  64     {"peerkey", OPT_PEERKEY, 's', "Peer key file used in key derivation"},
  65     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  66     {"peerform", OPT_PEERFORM, 'E', "Peer key format - default PEM"},
  67     {"keyform", OPT_KEYFORM, 'E', "Private key format - default PEM"},
  68     {"pkeyopt", OPT_PKEYOPT, 's', "Public key options as opt:value"},
  69     OPT_R_OPTIONS,
  70 #ifndef OPENSSL_NO_ENGINE
  71     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  72     {"engine_impl", OPT_ENGINE_IMPL, '-',
  73      "Also use engine given by -engine for crypto operations"},
  74 #endif
  75     {NULL}
  76 };
  77
  78 int pkeyutl_main(int argc, char **argv)
  79 {
  80     BIO *in = NULL, *out = NULL;
  81     ENGINE *e = NULL;
  82     EVP_PKEY_CTX *ctx = NULL;
  83     char *infile = NULL, *outfile = NULL, *sigfile = NULL, *passinarg = NULL;
  84     char hexdump = 0, asn1parse = 0, rev = 0, *prog;
  85     unsigned char *buf_in = NULL, *buf_out = NULL, *sig = NULL;
  86     OPTION_CHOICE o;
  87     int buf_inlen = 0, siglen = -1, keyform = FORMAT_PEM, peerform = FORMAT_PEM;
  88     int keysize = -1, pkey_op = EVP_PKEY_OP_SIGN, key_type = KEY_PRIVKEY;
  89     int engine_impl = 0;
  90     int ret = 1, rv = -1;
  91     size_t buf_outlen;
  92     const char *inkey = NULL;
  93     const char *peerkey = NULL;
  94     const char *kdfalg = NULL;
  95     int kdflen = 0;
  96     STACK_OF(OPENSSL_STRING) *pkeyopts = NULL;
  97
  98     prog = opt_init(argc, argv, pkeyutl_options);
  99     while ((o = opt_next()) != OPT_EOF) {
 100         switch (o) {
 101         case OPT_EOF:
 102         case OPT_ERR:
 103  opthelp:
 104             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 105             goto end;
 106         case OPT_HELP:
 107             opt_help(pkeyutl_options);
 108             ret = 0;
 109             goto end;
 110         case OPT_IN:
 111             infile = opt_arg();
 112             break;
 113         case OPT_OUT:
 114             outfile = opt_arg();
 115             break;
 116         case OPT_SIGFILE:
 117             sigfile = opt_arg();
 118             break;
 119         case OPT_ENGINE_IMPL:
 120             engine_impl = 1;
 121             break;
 122         case OPT_INKEY:
 123             inkey = opt_arg();
 124             break;
 125         case OPT_PEERKEY:
 126             peerkey = opt_arg();
 127             break;
 128         case OPT_PASSIN:
 129             passinarg = opt_arg();
 130             break;
 131         case OPT_PEERFORM:
 132             if (!opt_format(opt_arg(), OPT_FMT_PDE, &peerform))
 133                 goto opthelp;
 134             break;
 135         case OPT_KEYFORM:
 136             if (!opt_format(opt_arg(), OPT_FMT_PDE, &keyform))
 137                 goto opthelp;
 138             break;
 139         case OPT_R_CASES:
 140             if (!opt_rand(o))
 141                 goto end;
 142             break;
 143         case OPT_ENGINE:
 144             e = setup_engine(opt_arg(), 0);
 145             break;
 146         case OPT_PUBIN:
 147             key_type = KEY_PUBKEY;
 148             break;
 149         case OPT_CERTIN:
 150             key_type = KEY_CERT;
 151             break;
 152         case OPT_ASN1PARSE:
 153             asn1parse = 1;
 154             break;
 155         case OPT_HEXDUMP:
 156             hexdump = 1;
 157             break;
 158         case OPT_SIGN:
 159             pkey_op = EVP_PKEY_OP_SIGN;
 160             break;
 161         case OPT_VERIFY:
 162             pkey_op = EVP_PKEY_OP_VERIFY;
 163             break;
 164         case OPT_VERIFYRECOVER:
 165             pkey_op = EVP_PKEY_OP_VERIFYRECOVER;
 166             break;
 167         case OPT_ENCRYPT:
 168             pkey_op = EVP_PKEY_OP_ENCRYPT;
 169             break;
 170         case OPT_DECRYPT:
 171             pkey_op = EVP_PKEY_OP_DECRYPT;
 172             break;
 173         case OPT_DERIVE:
 174             pkey_op = EVP_PKEY_OP_DERIVE;
 175             break;
 176         case OPT_KDF:
 177             pkey_op = EVP_PKEY_OP_DERIVE;
 178             key_type = KEY_NONE;
 179             kdfalg = opt_arg();
 180             break;
 181         case OPT_KDFLEN:
 182             kdflen = atoi(opt_arg());
 183             break;
 184         case OPT_REV:
 185             rev = 1;
 186             break;
 187         case OPT_PKEYOPT:
 188             if ((pkeyopts == NULL &&
 189                  (pkeyopts = sk_OPENSSL_STRING_new_null()) == NULL) ||
 190                 sk_OPENSSL_STRING_push(pkeyopts, opt_arg()) == 0) {
 191                 BIO_puts(bio_err, "out of memory\n");
 192                 goto end;
 193             }
 194             break;
 195         }
 196     }
 197     argc = opt_num_rest();
 198     if (argc != 0)
 199         goto opthelp;
 200
 201     if (kdfalg != NULL) {
 202         if (kdflen == 0) {
 203             BIO_printf(bio_err,
 204                        "%s: no KDF length given (-kdflen parameter).\n", prog);
 205             goto opthelp;
 206         }
 207     } else if (inkey == NULL) {
 208         BIO_printf(bio_err,
 209                    "%s: no private key given (-inkey parameter).\n", prog);
 210         goto opthelp;
 211     } else if (peerkey != NULL && pkey_op != EVP_PKEY_OP_DERIVE) {
 212         BIO_printf(bio_err,
 213                    "%s: no peer key given (-peerkey parameter).\n", prog);
 214         goto opthelp;
 215     }
 216     ctx = init_ctx(kdfalg, &keysize, inkey, keyform, key_type,
 217                    passinarg, pkey_op, e, engine_impl);
 218     if (ctx == NULL) {
 219         BIO_printf(bio_err, "%s: Error initializing context\n", prog);
 220         ERR_print_errors(bio_err);
 221         goto end;
 222     }
 223     if (peerkey != NULL && !setup_peer(ctx, peerform, peerkey, e)) {
 224         BIO_printf(bio_err, "%s: Error setting up peer key\n", prog);
 225         ERR_print_errors(bio_err);
 226         goto end;
 227     }
 228     if (pkeyopts != NULL) {
 229         int num = sk_OPENSSL_STRING_num(pkeyopts);
 230         int i;
 231
 232         for (i = 0; i < num; ++i) {
 233             const char *opt = sk_OPENSSL_STRING_value(pkeyopts, i);
 234
 235             if (pkey_ctrl_string(ctx, opt) <= 0) {
 236                 BIO_printf(bio_err, "%s: Can't set parameter \"%s\":\n",
 237                            prog, opt);
 238                 ERR_print_errors(bio_err);
 239                 goto end;
 240             }
 241         }
 242     }
 243
 244     if (sigfile != NULL && (pkey_op != EVP_PKEY_OP_VERIFY)) {
 245         BIO_printf(bio_err,
 246                    "%s: Signature file specified for non verify\n", prog);
 247         goto end;
 248     }
 249
 250     if (sigfile == NULL && (pkey_op == EVP_PKEY_OP_VERIFY)) {
 251         BIO_printf(bio_err,
 252                    "%s: No signature file specified for verify\n", prog);
 253         goto end;
 254     }
 255
 256     if (pkey_op != EVP_PKEY_OP_DERIVE) {
 257         in = bio_open_default(infile, 'r', FORMAT_BINARY);
 258         if (in == NULL)
 259             goto end;
 260     }
 261     out = bio_open_default(outfile, 'w', FORMAT_BINARY);
 262     if (out == NULL)
 263         goto end;
 264
 265     if (sigfile != NULL) {
 266         BIO *sigbio = BIO_new_file(sigfile, "rb");
 267
 268         if (sigbio == NULL) {
 269             BIO_printf(bio_err, "Can't open signature file %s\n", sigfile);
 270             goto end;
 271         }
 272         siglen = bio_to_mem(&sig, keysize * 10, sigbio);
 273         BIO_free(sigbio);
 274         if (siglen < 0) {
 275             BIO_printf(bio_err, "Error reading signature data\n");
 276             goto end;
 277         }
 278     }
 279
 280     if (in != NULL) {
 281         /* Read the input data */
 282         buf_inlen = bio_to_mem(&buf_in, keysize * 10, in);
 283         if (buf_inlen < 0) {
 284             BIO_printf(bio_err, "Error reading input Data\n");
 285             goto end;
 286         }
 287         if (rev) {
 288             size_t i;
 289             unsigned char ctmp;
 290             size_t l = (size_t)buf_inlen;
 291             for (i = 0; i < l / 2; i++) {
 292                 ctmp = buf_in[i];
 293                 buf_in[i] = buf_in[l - 1 - i];
 294                 buf_in[l - 1 - i] = ctmp;
 295             }
 296         }
 297     }
 298
 299     /* Sanity check the input */
 300     if (buf_inlen > EVP_MAX_MD_SIZE
 301             && (pkey_op == EVP_PKEY_OP_SIGN
 302                 || pkey_op == EVP_PKEY_OP_VERIFY
 303                 || pkey_op == EVP_PKEY_OP_VERIFYRECOVER)) {
 304         BIO_printf(bio_err,
 305                    "Error: The input data looks too long to be a hash\n");
 306         goto end;
 307     }
 308
 309     if (pkey_op == EVP_PKEY_OP_VERIFY) {
 310         rv = EVP_PKEY_verify(ctx, sig, (size_t)siglen,
 311                              buf_in, (size_t)buf_inlen);
 312         if (rv == 1) {
 313             BIO_puts(out, "Signature Verified Successfully\n");
 314             ret = 0;
 315         } else {
 316             BIO_puts(out, "Signature Verification Failure\n");
 317         }
 318         goto end;
 319     }
 320     if (kdflen != 0) {
 321         buf_outlen = kdflen;
 322         rv = 1;
 323     } else {
 324         rv = do_keyop(ctx, pkey_op, NULL, (size_t *)&buf_outlen,
 325                       buf_in, (size_t)buf_inlen);
 326     }
 327     if (rv > 0 && buf_outlen != 0) {
 328         buf_out = app_malloc(buf_outlen, "buffer output");
 329         rv = do_keyop(ctx, pkey_op,
 330                       buf_out, (size_t *)&buf_outlen,
 331                       buf_in, (size_t)buf_inlen);
 332     }
 333     if (rv <= 0) {
 334         if (pkey_op != EVP_PKEY_OP_DERIVE) {
 335             BIO_puts(bio_err, "Public Key operation error\n");
 336         } else {
 337             BIO_puts(bio_err, "Key derivation failed\n");
 338         }
 339         ERR_print_errors(bio_err);
 340         goto end;
 341     }
 342     ret = 0;
 343
 344     if (asn1parse) {
 345         if (!ASN1_parse_dump(out, buf_out, buf_outlen, 1, -1))
 346             ERR_print_errors(bio_err);
 347     } else if (hexdump) {
 348         BIO_dump(out, (char *)buf_out, buf_outlen);
 349     } else {
 350         BIO_write(out, buf_out, buf_outlen);
 351     }
 352
 353  end:
 354     EVP_PKEY_CTX_free(ctx);
 355     release_engine(e);
 356     BIO_free(in);
 357     BIO_free_all(out);
 358     OPENSSL_free(buf_in);
 359     OPENSSL_free(buf_out);
 360     OPENSSL_free(sig);
 361     sk_OPENSSL_STRING_free(pkeyopts);
 362     return ret;
 363 }
 364
 365 static EVP_PKEY_CTX *init_ctx(const char *kdfalg, int *pkeysize,
 366                               const char *keyfile, int keyform, int key_type,
 367                               char *passinarg, int pkey_op, ENGINE *e,
 368                               const int engine_impl)
 369 {
 370     EVP_PKEY *pkey = NULL;
 371     EVP_PKEY_CTX *ctx = NULL;
 372     ENGINE *impl = NULL;
 373     char *passin = NULL;
 374     int rv = -1;
 375     X509 *x;
 376     if (((pkey_op == EVP_PKEY_OP_SIGN) || (pkey_op == EVP_PKEY_OP_DECRYPT)
 377          || (pkey_op == EVP_PKEY_OP_DERIVE))
 378         && (key_type != KEY_PRIVKEY && kdfalg == NULL)) {
 379         BIO_printf(bio_err, "A private key is needed for this operation\n");
 380         goto end;
 381     }
 382     if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 383         BIO_printf(bio_err, "Error getting password\n");
 384         goto end;
 385     }
 386     switch (key_type) {
 387     case KEY_PRIVKEY:
 388         pkey = load_key(keyfile, keyform, 0, passin, e, "Private Key");
 389         break;
 390
 391     case KEY_PUBKEY:
 392         pkey = load_pubkey(keyfile, keyform, 0, NULL, e, "Public Key");
 393         break;
 394
 395     case KEY_CERT:
 396         x = load_cert(keyfile, keyform, "Certificate");
 397         if (x) {
 398             pkey = X509_get_pubkey(x);
 399             X509_free(x);
 400         }
 401         break;
 402
 403     case KEY_NONE:
 404         break;
 405
 406     }
 407
 408 #ifndef OPENSSL_NO_ENGINE
 409     if (engine_impl)
 410         impl = e;
 411 #endif
 412
 413     if (kdfalg != NULL) {
 414         int kdfnid = OBJ_sn2nid(kdfalg);
 415
 416         if (kdfnid == NID_undef) {
 417             kdfnid = OBJ_ln2nid(kdfalg);
 418             if (kdfnid == NID_undef) {
 419                 BIO_printf(bio_err, "The given KDF \"%s\" is unknown.\n",
 420                            kdfalg);
 421                 goto end;
 422             }
 423         }
 424         ctx = EVP_PKEY_CTX_new_id(kdfnid, impl);
 425     } else {
 426         if (pkey == NULL)
 427             goto end;
 428         *pkeysize = EVP_PKEY_size(pkey);
 429         ctx = EVP_PKEY_CTX_new(pkey, impl);
 430         EVP_PKEY_free(pkey);
 431     }
 432
 433     if (ctx == NULL)
 434         goto end;
 435
 436     switch (pkey_op) {
 437     case EVP_PKEY_OP_SIGN:
 438         rv = EVP_PKEY_sign_init(ctx);
 439         break;
 440
 441     case EVP_PKEY_OP_VERIFY:
 442         rv = EVP_PKEY_verify_init(ctx);
 443         break;
 444
 445     case EVP_PKEY_OP_VERIFYRECOVER:
 446         rv = EVP_PKEY_verify_recover_init(ctx);
 447         break;
 448
 449     case EVP_PKEY_OP_ENCRYPT:
 450         rv = EVP_PKEY_encrypt_init(ctx);
 451         break;
 452
 453     case EVP_PKEY_OP_DECRYPT:
 454         rv = EVP_PKEY_decrypt_init(ctx);
 455         break;
 456
 457     case EVP_PKEY_OP_DERIVE:
 458         rv = EVP_PKEY_derive_init(ctx);
 459         break;
 460     }
 461
 462     if (rv <= 0) {
 463         EVP_PKEY_CTX_free(ctx);
 464         ctx = NULL;
 465     }
 466
 467  end:
 468     OPENSSL_free(passin);
 469     return ctx;
 470
 471 }
 472
 473 static int setup_peer(EVP_PKEY_CTX *ctx, int peerform, const char *file,
 474                       ENGINE *e)
 475 {
 476     EVP_PKEY *peer = NULL;
 477     ENGINE *engine = NULL;
 478     int ret;
 479
 480     if (peerform == FORMAT_ENGINE)
 481         engine = e;
 482     peer = load_pubkey(file, peerform, 0, NULL, engine, "Peer Key");
 483     if (peer == NULL) {
 484         BIO_printf(bio_err, "Error reading peer key %s\n", file);
 485         ERR_print_errors(bio_err);
 486         return 0;
 487     }
 488
 489     ret = EVP_PKEY_derive_set_peer(ctx, peer);
 490
 491     EVP_PKEY_free(peer);
 492     if (ret <= 0)
 493         ERR_print_errors(bio_err);
 494     return ret;
 495 }
 496
 497 static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op,
 498                     unsigned char *out, size_t *poutlen,
 499                     const unsigned char *in, size_t inlen)
 500 {
 501     int rv = 0;
 502     switch (pkey_op) {
 503     case EVP_PKEY_OP_VERIFYRECOVER:
 504         rv = EVP_PKEY_verify_recover(ctx, out, poutlen, in, inlen);
 505         break;
 506
 507     case EVP_PKEY_OP_SIGN:
 508         rv = EVP_PKEY_sign(ctx, out, poutlen, in, inlen);
 509         break;
 510
 511     case EVP_PKEY_OP_ENCRYPT:
 512         rv = EVP_PKEY_encrypt(ctx, out, poutlen, in, inlen);
 513         break;
 514
 515     case EVP_PKEY_OP_DECRYPT:
 516         rv = EVP_PKEY_decrypt(ctx, out, poutlen, in, inlen);
 517         break;
 518
 519     case EVP_PKEY_OP_DERIVE:
 520         rv = EVP_PKEY_derive(ctx, out, poutlen);
 521         break;
 522
 523     }
 524     return rv;
 525 }