apps/pkey.c

   1 /*
   2  * Copyright 2006-2021 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 <string.h>
  12 #include "apps.h"
  13 #include "progs.h"
  14 #include "ec_common.h"
  15 #include <openssl/pem.h>
  16 #include <openssl/err.h>
  17 #include <openssl/evp.h>
  18 #include <openssl/core_names.h>
  19
  20 typedef enum OPTION_choice {
  21     OPT_COMMON,
  22     OPT_INFORM, OPT_OUTFORM, OPT_PASSIN, OPT_PASSOUT, OPT_ENGINE,
  23     OPT_IN, OPT_OUT, OPT_PUBIN, OPT_PUBOUT, OPT_TEXT_PUB,
  24     OPT_TEXT, OPT_NOOUT, OPT_CIPHER, OPT_TRADITIONAL, OPT_CHECK, OPT_PUB_CHECK,
  25     OPT_EC_PARAM_ENC, OPT_EC_CONV_FORM,
  26     OPT_PROV_ENUM
  27 } OPTION_CHOICE;
  28
  29 const OPTIONS pkey_options[] = {
  30     OPT_SECTION("General"),
  31     {"help", OPT_HELP, '-', "Display this summary"},
  32 #ifndef OPENSSL_NO_ENGINE
  33     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  34 #endif
  35     OPT_PROV_OPTIONS,
  36
  37     {"check", OPT_CHECK, '-', "Check key consistency"},
  38     {"pubcheck", OPT_PUB_CHECK, '-', "Check public key consistency"},
  39
  40     OPT_SECTION("Input"),
  41     {"in", OPT_IN, 's', "Input key"},
  42     {"inform", OPT_INFORM, 'f',
  43      "Key input format (ENGINE, other values ignored)"},
  44     {"passin", OPT_PASSIN, 's', "Key input pass phrase source"},
  45     {"pubin", OPT_PUBIN, '-',
  46      "Read only public components from key input"},
  47
  48     OPT_SECTION("Output"),
  49     {"out", OPT_OUT, '>', "Output file for encoded and/or text output"},
  50     {"outform", OPT_OUTFORM, 'F', "Output encoding format (DER or PEM)"},
  51     {"", OPT_CIPHER, '-', "Any supported cipher to be used for encryption"},
  52     {"passout", OPT_PASSOUT, 's', "Output PEM file pass phrase source"},
  53     {"traditional", OPT_TRADITIONAL, '-',
  54      "Use traditional format for private key PEM output"},
  55     {"pubout", OPT_PUBOUT, '-', "Restrict encoded output to public components"},
  56     {"noout", OPT_NOOUT, '-', "Do not output the key in encoded form"},
  57     {"text", OPT_TEXT, '-', "Output key components in plaintext"},
  58     {"text_pub", OPT_TEXT_PUB, '-',
  59      "Output only public key components in text form"},
  60     {"ec_conv_form", OPT_EC_CONV_FORM, 's',
  61      "Specifies the EC point conversion form in the encoding"},
  62     {"ec_param_enc", OPT_EC_PARAM_ENC, 's',
  63      "Specifies the way the EC parameters are encoded"},
  64
  65     {NULL}
  66 };
  67
  68 int pkey_main(int argc, char **argv)
  69 {
  70     BIO *out = NULL;
  71     ENGINE *e = NULL;
  72     EVP_PKEY *pkey = NULL;
  73     EVP_PKEY_CTX *ctx = NULL;
  74     EVP_CIPHER *cipher = NULL;
  75     char *infile = NULL, *outfile = NULL, *passin = NULL, *passout = NULL;
  76     char *passinarg = NULL, *passoutarg = NULL, *ciphername = NULL, *prog;
  77     OPTION_CHOICE o;
  78     int informat = FORMAT_UNDEF, outformat = FORMAT_PEM;
  79     int pubin = 0, pubout = 0, text_pub = 0, text = 0, noout = 0, ret = 1;
  80     int private = 0, traditional = 0, check = 0, pub_check = 0;
  81 #ifndef OPENSSL_NO_EC
  82     char *asn1_encoding = NULL;
  83     char *point_format = NULL;
  84 #endif
  85
  86     prog = opt_init(argc, argv, pkey_options);
  87     while ((o = opt_next()) != OPT_EOF) {
  88         switch (o) {
  89         case OPT_EOF:
  90         case OPT_ERR:
  91  opthelp:
  92             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  93             goto end;
  94         case OPT_HELP:
  95             opt_help(pkey_options);
  96             ret = 0;
  97             goto end;
  98         case OPT_INFORM:
  99             if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
 100                 goto opthelp;
 101             break;
 102         case OPT_OUTFORM:
 103             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
 104                 goto opthelp;
 105             break;
 106         case OPT_PASSIN:
 107             passinarg = opt_arg();
 108             break;
 109         case OPT_PASSOUT:
 110             passoutarg = opt_arg();
 111             break;
 112         case OPT_ENGINE:
 113             e = setup_engine(opt_arg(), 0);
 114             break;
 115         case OPT_IN:
 116             infile = opt_arg();
 117             break;
 118         case OPT_OUT:
 119             outfile = opt_arg();
 120             break;
 121         case OPT_PUBIN:
 122             pubin = pubout = 1;
 123             break;
 124         case OPT_PUBOUT:
 125             pubout = 1;
 126             break;
 127         case OPT_TEXT_PUB:
 128             text_pub = 1;
 129             break;
 130         case OPT_TEXT:
 131             text = 1;
 132             break;
 133         case OPT_NOOUT:
 134             noout = 1;
 135             break;
 136         case OPT_TRADITIONAL:
 137             traditional = 1;
 138             break;
 139         case OPT_CHECK:
 140             check = 1;
 141             break;
 142         case OPT_PUB_CHECK:
 143             pub_check = 1;
 144             break;
 145         case OPT_CIPHER:
 146             ciphername = opt_unknown();
 147             break;
 148         case OPT_EC_CONV_FORM:
 149 #ifdef OPENSSL_NO_EC
 150             goto opthelp;
 151 #else
 152             point_format = opt_arg();
 153             if (!opt_string(point_format, point_format_options))
 154                 goto opthelp;
 155             break;
 156 #endif
 157         case OPT_EC_PARAM_ENC:
 158 #ifdef OPENSSL_NO_EC
 159             goto opthelp;
 160 #else
 161             asn1_encoding = opt_arg();
 162             if (!opt_string(asn1_encoding, asn1_encoding_options))
 163                 goto opthelp;
 164             break;
 165 #endif
 166         case OPT_PROV_CASES:
 167             if (!opt_provider(o))
 168                 goto end;
 169             break;
 170         }
 171     }
 172
 173     /* No extra arguments. */
 174     if (!opt_check_rest_arg(NULL))
 175         goto opthelp;
 176
 177     if (text && text_pub)
 178         BIO_printf(bio_err,
 179                    "Warning: The -text option is ignored with -text_pub\n");
 180     if (traditional && (noout || outformat != FORMAT_PEM))
 181         BIO_printf(bio_err,
 182                    "Warning: The -traditional is ignored since there is no PEM output\n");
 183
 184     /* -pubout and -text is the same as -text_pub */
 185     if (!text_pub && pubout && text) {
 186         text = 0;
 187         text_pub = 1;
 188     }
 189
 190     private = (!noout && !pubout) || (text && !text_pub);
 191
 192     if (!opt_cipher(ciphername, &cipher))
 193         goto opthelp;
 194     if (cipher == NULL) {
 195         if (passoutarg != NULL)
 196             BIO_printf(bio_err,
 197                        "Warning: The -passout option is ignored without a cipher option\n");
 198     } else {
 199         if (noout || outformat != FORMAT_PEM) {
 200             BIO_printf(bio_err,
 201                        "Error: Cipher options are supported only for PEM output\n");
 202             goto end;
 203         }
 204     }
 205     if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
 206         BIO_printf(bio_err, "Error getting passwords\n");
 207         goto end;
 208     }
 209
 210     out = bio_open_owner(outfile, outformat, private);
 211     if (out == NULL)
 212         goto end;
 213
 214     if (pubin)
 215         pkey = load_pubkey(infile, informat, 1, passin, e, "Public Key");
 216     else
 217         pkey = load_key(infile, informat, 1, passin, e, "key");
 218     if (pkey == NULL)
 219         goto end;
 220
 221 #ifndef OPENSSL_NO_EC
 222     if (asn1_encoding != NULL || point_format != NULL) {
 223         OSSL_PARAM params[3], *p = params;
 224
 225         if (!EVP_PKEY_is_a(pkey, "EC"))
 226             goto end;
 227
 228         if (asn1_encoding != NULL)
 229             *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_EC_ENCODING,
 230                                                     asn1_encoding, 0);
 231         if (point_format != NULL)
 232             *p++ = OSSL_PARAM_construct_utf8_string(
 233                        OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT,
 234                        point_format, 0);
 235         *p = OSSL_PARAM_construct_end();
 236         if (EVP_PKEY_set_params(pkey, params) <= 0)
 237             goto end;
 238     }
 239 #endif
 240
 241     if (check || pub_check) {
 242         int r;
 243
 244         ctx = EVP_PKEY_CTX_new(pkey, e);
 245         if (ctx == NULL) {
 246             ERR_print_errors(bio_err);
 247             goto end;
 248         }
 249
 250         if (check)
 251             r = EVP_PKEY_check(ctx);
 252         else
 253             r = EVP_PKEY_public_check(ctx);
 254
 255         if (r == 1) {
 256             BIO_printf(out, "Key is valid\n");
 257         } else {
 258             /*
 259              * Note: at least for RSA keys if this function returns
 260              * -1, there will be no error reasons.
 261              */
 262             BIO_printf(bio_err, "Key is invalid\n");
 263             ERR_print_errors(bio_err);
 264             goto end;
 265         }
 266     }
 267
 268     if (!noout) {
 269         if (outformat == FORMAT_PEM) {
 270             if (pubout) {
 271                 if (!PEM_write_bio_PUBKEY(out, pkey))
 272                     goto end;
 273             } else {
 274                 assert(private);
 275                 if (traditional) {
 276                     if (!PEM_write_bio_PrivateKey_traditional(out, pkey, cipher,
 277                                                               NULL, 0, NULL,
 278                                                               passout))
 279                         goto end;
 280                 } else {
 281                     if (!PEM_write_bio_PrivateKey(out, pkey, cipher,
 282                                                   NULL, 0, NULL, passout))
 283                         goto end;
 284                 }
 285             }
 286         } else if (outformat == FORMAT_ASN1) {
 287             if (text || text_pub) {
 288                 BIO_printf(bio_err,
 289                            "Error: Text output cannot be combined with DER output\n");
 290                 goto end;
 291             }
 292             if (pubout) {
 293                 if (!i2d_PUBKEY_bio(out, pkey))
 294                     goto end;
 295             } else {
 296                 assert(private);
 297                 if (!i2d_PrivateKey_bio(out, pkey))
 298                     goto end;
 299             }
 300         } else {
 301             BIO_printf(bio_err, "Bad format specified for key\n");
 302             goto end;
 303         }
 304     }
 305
 306     if (text_pub) {
 307         if (EVP_PKEY_print_public(out, pkey, 0, NULL) <= 0)
 308             goto end;
 309     } else if (text) {
 310         assert(private);
 311         if (EVP_PKEY_print_private(out, pkey, 0, NULL) <= 0)
 312             goto end;
 313     }
 314
 315     ret = 0;
 316
 317  end:
 318     if (ret != 0)
 319         ERR_print_errors(bio_err);
 320     EVP_PKEY_CTX_free(ctx);
 321     EVP_PKEY_free(pkey);
 322     EVP_CIPHER_free(cipher);
 323     release_engine(e);
 324     BIO_free_all(out);
 325     OPENSSL_free(passin);
 326     OPENSSL_free(passout);
 327
 328     return ret;
 329 }