apps/ec.c

   1 /*
   2  * Copyright 2002-2018 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 <openssl/opensslconf.h>
  11 #ifdef OPENSSL_NO_EC
  12 NON_EMPTY_TRANSLATION_UNIT
  13 #else
  14
  15 # include <stdio.h>
  16 # include <stdlib.h>
  17 # include <string.h>
  18 # include "apps.h"
  19 # include "progs.h"
  20 # include <openssl/bio.h>
  21 # include <openssl/err.h>
  22 # include <openssl/evp.h>
  23 # include <openssl/pem.h>
  24
  25 static OPT_PAIR conv_forms[] = {
  26     {"compressed", POINT_CONVERSION_COMPRESSED},
  27     {"uncompressed", POINT_CONVERSION_UNCOMPRESSED},
  28     {"hybrid", POINT_CONVERSION_HYBRID},
  29     {NULL}
  30 };
  31
  32 static OPT_PAIR param_enc[] = {
  33     {"named_curve", OPENSSL_EC_NAMED_CURVE},
  34     {"explicit", 0},
  35     {NULL}
  36 };
  37
  38 typedef enum OPTION_choice {
  39     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  40     OPT_INFORM, OPT_OUTFORM, OPT_ENGINE, OPT_IN, OPT_OUT,
  41     OPT_NOOUT, OPT_TEXT, OPT_PARAM_OUT, OPT_PUBIN, OPT_PUBOUT,
  42     OPT_PASSIN, OPT_PASSOUT, OPT_PARAM_ENC, OPT_CONV_FORM, OPT_CIPHER,
  43     OPT_NO_PUBLIC, OPT_CHECK, OPT_PROV_ENUM
  44 } OPTION_CHOICE;
  45
  46 const OPTIONS ec_options[] = {
  47     OPT_SECTION("General"),
  48     {"help", OPT_HELP, '-', "Display this summary"},
  49 # ifndef OPENSSL_NO_ENGINE
  50     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  51 # endif
  52
  53     OPT_SECTION("Input"),
  54     {"in", OPT_IN, 's', "Input file"},
  55     {"inform", OPT_INFORM, 'f', "Input format - DER or PEM"},
  56     {"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
  57     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  58     {"check", OPT_CHECK, '-', "check key consistency"},
  59     {"", OPT_CIPHER, '-', "Any supported cipher"},
  60     {"param_enc", OPT_PARAM_ENC, 's',
  61      "Specifies the way the ec parameters are encoded"},
  62     {"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "},
  63
  64     OPT_SECTION("Output"),
  65     {"out", OPT_OUT, '>', "Output file"},
  66     {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
  67     {"noout", OPT_NOOUT, '-', "Don't print key out"},
  68     {"text", OPT_TEXT, '-', "Print the key"},
  69     {"param_out", OPT_PARAM_OUT, '-', "Print the elliptic curve parameters"},
  70     {"pubout", OPT_PUBOUT, '-', "Output public key, not private"},
  71     {"no_public", OPT_NO_PUBLIC, '-', "exclude public key from private key"},
  72     {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
  73
  74     OPT_PROV_OPTIONS,
  75     {NULL}
  76 };
  77
  78 int ec_main(int argc, char **argv)
  79 {
  80     BIO *in = NULL, *out = NULL;
  81     ENGINE *e = NULL;
  82     EC_KEY *eckey = NULL;
  83     const EC_GROUP *group;
  84     const EVP_CIPHER *enc = NULL;
  85     point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
  86     char *infile = NULL, *outfile = NULL, *prog;
  87     char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
  88     OPTION_CHOICE o;
  89     int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_form = 0, new_asn1_flag = 0;
  90     int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, noout = 0;
  91     int pubin = 0, pubout = 0, param_out = 0, i, ret = 1, private = 0;
  92     int no_public = 0, check = 0;
  93
  94     prog = opt_init(argc, argv, ec_options);
  95     while ((o = opt_next()) != OPT_EOF) {
  96         switch (o) {
  97         case OPT_EOF:
  98         case OPT_ERR:
  99  opthelp:
 100             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 101             goto end;
 102         case OPT_HELP:
 103             opt_help(ec_options);
 104             ret = 0;
 105             goto end;
 106         case OPT_INFORM:
 107             if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
 108                 goto opthelp;
 109             break;
 110         case OPT_IN:
 111             infile = opt_arg();
 112             break;
 113         case OPT_OUTFORM:
 114             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
 115                 goto opthelp;
 116             break;
 117         case OPT_OUT:
 118             outfile = opt_arg();
 119             break;
 120         case OPT_NOOUT:
 121             noout = 1;
 122             break;
 123         case OPT_TEXT:
 124             text = 1;
 125             break;
 126         case OPT_PARAM_OUT:
 127             param_out = 1;
 128             break;
 129         case OPT_PUBIN:
 130             pubin = 1;
 131             break;
 132         case OPT_PUBOUT:
 133             pubout = 1;
 134             break;
 135         case OPT_PASSIN:
 136             passinarg = opt_arg();
 137             break;
 138         case OPT_PASSOUT:
 139             passoutarg = opt_arg();
 140             break;
 141         case OPT_ENGINE:
 142             e = setup_engine(opt_arg(), 0);
 143             break;
 144         case OPT_CIPHER:
 145             if (!opt_cipher(opt_unknown(), &enc))
 146                 goto opthelp;
 147             break;
 148         case OPT_CONV_FORM:
 149             if (!opt_pair(opt_arg(), conv_forms, &i))
 150                 goto opthelp;
 151             new_form = 1;
 152             form = i;
 153             break;
 154         case OPT_PARAM_ENC:
 155             if (!opt_pair(opt_arg(), param_enc, &i))
 156                 goto opthelp;
 157             new_asn1_flag = 1;
 158             asn1_flag = i;
 159             break;
 160         case OPT_NO_PUBLIC:
 161             no_public = 1;
 162             break;
 163         case OPT_CHECK:
 164             check = 1;
 165             break;
 166         case OPT_PROV_CASES:
 167             if (!opt_provider(o))
 168                 goto end;
 169             break;
 170         }
 171     }
 172     argc = opt_num_rest();
 173     if (argc != 0)
 174         goto opthelp;
 175
 176     private = param_out || pubin || pubout ? 0 : 1;
 177     if (text && !pubin)
 178         private = 1;
 179
 180     if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
 181         BIO_printf(bio_err, "Error getting passwords\n");
 182         goto end;
 183     }
 184
 185     if (informat != FORMAT_ENGINE) {
 186         in = bio_open_default(infile, 'r', informat);
 187         if (in == NULL)
 188             goto end;
 189     }
 190
 191     BIO_printf(bio_err, "read EC key\n");
 192     if (informat == FORMAT_ASN1) {
 193         if (pubin)
 194             eckey = d2i_EC_PUBKEY_bio(in, NULL);
 195         else
 196             eckey = d2i_ECPrivateKey_bio(in, NULL);
 197     } else if (informat == FORMAT_ENGINE) {
 198         EVP_PKEY *pkey;
 199         if (pubin)
 200             pkey = load_pubkey(infile, informat, 1, passin, e, "Public Key");
 201         else
 202             pkey = load_key(infile, informat, 1, passin, e, "Private Key");
 203         if (pkey != NULL) {
 204             eckey = EVP_PKEY_get1_EC_KEY(pkey);
 205             EVP_PKEY_free(pkey);
 206         }
 207     } else {
 208         if (pubin)
 209             eckey = PEM_read_bio_EC_PUBKEY(in, NULL, NULL, NULL);
 210         else
 211             eckey = PEM_read_bio_ECPrivateKey(in, NULL, NULL, passin);
 212     }
 213     if (eckey == NULL) {
 214         BIO_printf(bio_err, "unable to load Key\n");
 215         ERR_print_errors(bio_err);
 216         goto end;
 217     }
 218
 219     out = bio_open_owner(outfile, outformat, private);
 220     if (out == NULL)
 221         goto end;
 222
 223     group = EC_KEY_get0_group(eckey);
 224
 225     if (new_form)
 226         EC_KEY_set_conv_form(eckey, form);
 227
 228     if (new_asn1_flag)
 229         EC_KEY_set_asn1_flag(eckey, asn1_flag);
 230
 231     if (no_public)
 232         EC_KEY_set_enc_flags(eckey, EC_PKEY_NO_PUBKEY);
 233
 234     if (text) {
 235         assert(pubin || private);
 236         if (!EC_KEY_print(out, eckey, 0)) {
 237             perror(outfile);
 238             ERR_print_errors(bio_err);
 239             goto end;
 240         }
 241     }
 242
 243     if (check) {
 244         if (EC_KEY_check_key(eckey) == 1) {
 245             BIO_printf(bio_err, "EC Key valid.\n");
 246         } else {
 247             BIO_printf(bio_err, "EC Key Invalid!\n");
 248             ERR_print_errors(bio_err);
 249         }
 250     }
 251
 252     if (noout) {
 253         ret = 0;
 254         goto end;
 255     }
 256
 257     BIO_printf(bio_err, "writing EC key\n");
 258     if (outformat == FORMAT_ASN1) {
 259         if (param_out) {
 260             i = i2d_ECPKParameters_bio(out, group);
 261         } else if (pubin || pubout) {
 262             i = i2d_EC_PUBKEY_bio(out, eckey);
 263         } else {
 264             assert(private);
 265             i = i2d_ECPrivateKey_bio(out, eckey);
 266         }
 267     } else {
 268         if (param_out) {
 269             i = PEM_write_bio_ECPKParameters(out, group);
 270         } else if (pubin || pubout) {
 271             i = PEM_write_bio_EC_PUBKEY(out, eckey);
 272         } else {
 273             assert(private);
 274             i = PEM_write_bio_ECPrivateKey(out, eckey, enc,
 275                                            NULL, 0, NULL, passout);
 276         }
 277     }
 278
 279     if (!i) {
 280         BIO_printf(bio_err, "unable to write private key\n");
 281         ERR_print_errors(bio_err);
 282     } else {
 283         ret = 0;
 284     }
 285  end:
 286     BIO_free(in);
 287     BIO_free_all(out);
 288     EC_KEY_free(eckey);
 289     release_engine(e);
 290     OPENSSL_free(passin);
 291     OPENSSL_free(passout);
 292     return ret;
 293 }
 294 #endif