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
  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     {NULL}
  74 };
  75
  76 int ec_main(int argc, char **argv)
  77 {
  78     BIO *in = NULL, *out = NULL;
  79     ENGINE *e = NULL;
  80     EC_KEY *eckey = NULL;
  81     const EC_GROUP *group;
  82     const EVP_CIPHER *enc = NULL;
  83     point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
  84     char *infile = NULL, *outfile = NULL, *prog;
  85     char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
  86     OPTION_CHOICE o;
  87     int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_form = 0, new_asn1_flag = 0;
  88     int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, noout = 0;
  89     int pubin = 0, pubout = 0, param_out = 0, i, ret = 1, private = 0;
  90     int no_public = 0, check = 0;
  91
  92     prog = opt_init(argc, argv, ec_options);
  93     while ((o = opt_next()) != OPT_EOF) {
  94         switch (o) {
  95         case OPT_EOF:
  96         case OPT_ERR:
  97  opthelp:
  98             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  99             goto end;
 100         case OPT_HELP:
 101             opt_help(ec_options);
 102             ret = 0;
 103             goto end;
 104         case OPT_INFORM:
 105             if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
 106                 goto opthelp;
 107             break;
 108         case OPT_IN:
 109             infile = opt_arg();
 110             break;
 111         case OPT_OUTFORM:
 112             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
 113                 goto opthelp;
 114             break;
 115         case OPT_OUT:
 116             outfile = opt_arg();
 117             break;
 118         case OPT_NOOUT:
 119             noout = 1;
 120             break;
 121         case OPT_TEXT:
 122             text = 1;
 123             break;
 124         case OPT_PARAM_OUT:
 125             param_out = 1;
 126             break;
 127         case OPT_PUBIN:
 128             pubin = 1;
 129             break;
 130         case OPT_PUBOUT:
 131             pubout = 1;
 132             break;
 133         case OPT_PASSIN:
 134             passinarg = opt_arg();
 135             break;
 136         case OPT_PASSOUT:
 137             passoutarg = opt_arg();
 138             break;
 139         case OPT_ENGINE:
 140             e = setup_engine(opt_arg(), 0);
 141             break;
 142         case OPT_CIPHER:
 143             if (!opt_cipher(opt_unknown(), &enc))
 144                 goto opthelp;
 145             break;
 146         case OPT_CONV_FORM:
 147             if (!opt_pair(opt_arg(), conv_forms, &i))
 148                 goto opthelp;
 149             new_form = 1;
 150             form = i;
 151             break;
 152         case OPT_PARAM_ENC:
 153             if (!opt_pair(opt_arg(), param_enc, &i))
 154                 goto opthelp;
 155             new_asn1_flag = 1;
 156             asn1_flag = i;
 157             break;
 158         case OPT_NO_PUBLIC:
 159             no_public = 1;
 160             break;
 161         case OPT_CHECK:
 162             check = 1;
 163             break;
 164         }
 165     }
 166     argc = opt_num_rest();
 167     if (argc != 0)
 168         goto opthelp;
 169
 170     private = param_out || pubin || pubout ? 0 : 1;
 171     if (text && !pubin)
 172         private = 1;
 173
 174     if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
 175         BIO_printf(bio_err, "Error getting passwords\n");
 176         goto end;
 177     }
 178
 179     if (informat != FORMAT_ENGINE) {
 180         in = bio_open_default(infile, 'r', informat);
 181         if (in == NULL)
 182             goto end;
 183     }
 184
 185     BIO_printf(bio_err, "read EC key\n");
 186     if (informat == FORMAT_ASN1) {
 187         if (pubin)
 188             eckey = d2i_EC_PUBKEY_bio(in, NULL);
 189         else
 190             eckey = d2i_ECPrivateKey_bio(in, NULL);
 191     } else if (informat == FORMAT_ENGINE) {
 192         EVP_PKEY *pkey;
 193         if (pubin)
 194             pkey = load_pubkey(infile, informat, 1, passin, e, "Public Key");
 195         else
 196             pkey = load_key(infile, informat, 1, passin, e, "Private Key");
 197         if (pkey != NULL) {
 198             eckey = EVP_PKEY_get1_EC_KEY(pkey);
 199             EVP_PKEY_free(pkey);
 200         }
 201     } else {
 202         if (pubin)
 203             eckey = PEM_read_bio_EC_PUBKEY(in, NULL, NULL, NULL);
 204         else
 205             eckey = PEM_read_bio_ECPrivateKey(in, NULL, NULL, passin);
 206     }
 207     if (eckey == NULL) {
 208         BIO_printf(bio_err, "unable to load Key\n");
 209         ERR_print_errors(bio_err);
 210         goto end;
 211     }
 212
 213     out = bio_open_owner(outfile, outformat, private);
 214     if (out == NULL)
 215         goto end;
 216
 217     group = EC_KEY_get0_group(eckey);
 218
 219     if (new_form)
 220         EC_KEY_set_conv_form(eckey, form);
 221
 222     if (new_asn1_flag)
 223         EC_KEY_set_asn1_flag(eckey, asn1_flag);
 224
 225     if (no_public)
 226         EC_KEY_set_enc_flags(eckey, EC_PKEY_NO_PUBKEY);
 227
 228     if (text) {
 229         assert(pubin || private);
 230         if (!EC_KEY_print(out, eckey, 0)) {
 231             perror(outfile);
 232             ERR_print_errors(bio_err);
 233             goto end;
 234         }
 235     }
 236
 237     if (check) {
 238         if (EC_KEY_check_key(eckey) == 1) {
 239             BIO_printf(bio_err, "EC Key valid.\n");
 240         } else {
 241             BIO_printf(bio_err, "EC Key Invalid!\n");
 242             ERR_print_errors(bio_err);
 243         }
 244     }
 245
 246     if (noout) {
 247         ret = 0;
 248         goto end;
 249     }
 250
 251     BIO_printf(bio_err, "writing EC key\n");
 252     if (outformat == FORMAT_ASN1) {
 253         if (param_out) {
 254             i = i2d_ECPKParameters_bio(out, group);
 255         } else if (pubin || pubout) {
 256             i = i2d_EC_PUBKEY_bio(out, eckey);
 257         } else {
 258             assert(private);
 259             i = i2d_ECPrivateKey_bio(out, eckey);
 260         }
 261     } else {
 262         if (param_out) {
 263             i = PEM_write_bio_ECPKParameters(out, group);
 264         } else if (pubin || pubout) {
 265             i = PEM_write_bio_EC_PUBKEY(out, eckey);
 266         } else {
 267             assert(private);
 268             i = PEM_write_bio_ECPrivateKey(out, eckey, enc,
 269                                            NULL, 0, NULL, passout);
 270         }
 271     }
 272
 273     if (!i) {
 274         BIO_printf(bio_err, "unable to write private key\n");
 275         ERR_print_errors(bio_err);
 276     } else {
 277         ret = 0;
 278     }
 279  end:
 280     BIO_free(in);
 281     BIO_free_all(out);
 282     EC_KEY_free(eckey);
 283     release_engine(e);
 284     OPENSSL_free(passin);
 285     OPENSSL_free(passout);
 286     return ret;
 287 }
 288 #endif