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