apps/ec.c

   1 /*
   2  * Copyright 2002-2020 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
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include "apps.h"
  16 #include "progs.h"
  17 #include <openssl/bio.h>
  18 #include <openssl/err.h>
  19 #include <openssl/evp.h>
  20 #include <openssl/pem.h>
  21
  22 static OPT_PAIR conv_forms[] = {
  23     {"compressed", POINT_CONVERSION_COMPRESSED},
  24     {"uncompressed", POINT_CONVERSION_UNCOMPRESSED},
  25     {"hybrid", POINT_CONVERSION_HYBRID},
  26     {NULL}
  27 };
  28
  29 static OPT_PAIR param_enc[] = {
  30     {"named_curve", OPENSSL_EC_NAMED_CURVE},
  31     {"explicit", 0},
  32     {NULL}
  33 };
  34
  35 typedef enum OPTION_choice {
  36     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  37     OPT_INFORM, OPT_OUTFORM, OPT_ENGINE, OPT_IN, OPT_OUT,
  38     OPT_NOOUT, OPT_TEXT, OPT_PARAM_OUT, OPT_PUBIN, OPT_PUBOUT,
  39     OPT_PASSIN, OPT_PASSOUT, OPT_PARAM_ENC, OPT_CONV_FORM, OPT_CIPHER,
  40     OPT_NO_PUBLIC, OPT_CHECK, OPT_PROV_ENUM
  41 } OPTION_CHOICE;
  42
  43 const OPTIONS ec_options[] = {
  44     OPT_SECTION("General"),
  45     {"help", OPT_HELP, '-', "Display this summary"},
  46 #ifndef OPENSSL_NO_ENGINE
  47     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  48 #endif
  49
  50     OPT_SECTION("Input"),
  51     {"in", OPT_IN, 's', "Input file"},
  52     {"inform", OPT_INFORM, 'f', "Input format (DER/PEM/P12/ENGINE)"},
  53     {"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
  54     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  55     {"check", OPT_CHECK, '-', "check key consistency"},
  56     {"", OPT_CIPHER, '-', "Any supported cipher"},
  57     {"param_enc", OPT_PARAM_ENC, 's',
  58      "Specifies the way the ec parameters are encoded"},
  59     {"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "},
  60
  61     OPT_SECTION("Output"),
  62     {"out", OPT_OUT, '>', "Output file"},
  63     {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
  64     {"noout", OPT_NOOUT, '-', "Don't print key out"},
  65     {"text", OPT_TEXT, '-', "Print the key"},
  66     {"param_out", OPT_PARAM_OUT, '-', "Print the elliptic curve parameters"},
  67     {"pubout", OPT_PUBOUT, '-', "Output public key, not private"},
  68     {"no_public", OPT_NO_PUBLIC, '-', "exclude public key from private key"},
  69     {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
  70
  71     OPT_PROV_OPTIONS,
  72     {NULL}
  73 };
  74
  75 int ec_main(int argc, char **argv)
  76 {
  77     BIO *in = NULL, *out = NULL;
  78     ENGINE *e = NULL;
  79     EC_KEY *eckey = NULL;
  80     const EC_GROUP *group;
  81     const EVP_CIPHER *enc = NULL;
  82     point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
  83     char *infile = NULL, *outfile = NULL, *prog;
  84     char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
  85     OPTION_CHOICE o;
  86     int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_form = 0, new_asn1_flag = 0;
  87     int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, noout = 0;
  88     int pubin = 0, pubout = 0, param_out = 0, i, ret = 1, private = 0;
  89     int no_public = 0, check = 0;
  90
  91     prog = opt_init(argc, argv, ec_options);
  92     while ((o = opt_next()) != OPT_EOF) {
  93         switch (o) {
  94         case OPT_EOF:
  95         case OPT_ERR:
  96  opthelp:
  97             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  98             goto end;
  99         case OPT_HELP:
 100             opt_help(ec_options);
 101             ret = 0;
 102             goto end;
 103         case OPT_INFORM:
 104             if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
 105                 goto opthelp;
 106             break;
 107         case OPT_IN:
 108             infile = opt_arg();
 109             break;
 110         case OPT_OUTFORM:
 111             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
 112                 goto opthelp;
 113             break;
 114         case OPT_OUT:
 115             outfile = opt_arg();
 116             break;
 117         case OPT_NOOUT:
 118             noout = 1;
 119             break;
 120         case OPT_TEXT:
 121             text = 1;
 122             break;
 123         case OPT_PARAM_OUT:
 124             param_out = 1;
 125             break;
 126         case OPT_PUBIN:
 127             pubin = 1;
 128             break;
 129         case OPT_PUBOUT:
 130             pubout = 1;
 131             break;
 132         case OPT_PASSIN:
 133             passinarg = opt_arg();
 134             break;
 135         case OPT_PASSOUT:
 136             passoutarg = opt_arg();
 137             break;
 138         case OPT_ENGINE:
 139             e = setup_engine(opt_arg(), 0);
 140             break;
 141         case OPT_CIPHER:
 142             if (!opt_cipher(opt_unknown(), &enc))
 143                 goto opthelp;
 144             break;
 145         case OPT_CONV_FORM:
 146             if (!opt_pair(opt_arg(), conv_forms, &i))
 147                 goto opthelp;
 148             new_form = 1;
 149             form = i;
 150             break;
 151         case OPT_PARAM_ENC:
 152             if (!opt_pair(opt_arg(), param_enc, &i))
 153                 goto opthelp;
 154             new_asn1_flag = 1;
 155             asn1_flag = i;
 156             break;
 157         case OPT_NO_PUBLIC:
 158             no_public = 1;
 159             break;
 160         case OPT_CHECK:
 161             check = 1;
 162             break;
 163         case OPT_PROV_CASES:
 164             if (!opt_provider(o))
 165                 goto end;
 166             break;
 167         }
 168     }
 169     argc = opt_num_rest();
 170     if (argc != 0)
 171         goto opthelp;
 172
 173     private = param_out || pubin || pubout ? 0 : 1;
 174     if (text && !pubin)
 175         private = 1;
 176
 177     if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
 178         BIO_printf(bio_err, "Error getting passwords\n");
 179         goto end;
 180     }
 181
 182     if (informat != FORMAT_ENGINE) {
 183         in = bio_open_default(infile, 'r', informat);
 184         if (in == NULL)
 185             goto end;
 186     }
 187
 188     BIO_printf(bio_err, "read EC key\n");
 189     if (informat == FORMAT_ASN1) {
 190         if (pubin)
 191             eckey = d2i_EC_PUBKEY_bio(in, NULL);
 192         else
 193             eckey = d2i_ECPrivateKey_bio(in, NULL);
 194     } else if (informat == FORMAT_ENGINE) {
 195         EVP_PKEY *pkey;
 196         if (pubin)
 197             pkey = load_pubkey(infile, informat, 1, passin, e, "public key");
 198         else
 199             pkey = load_key(infile, informat, 1, passin, e, "private key");
 200         if (pkey != NULL) {
 201             eckey = EVP_PKEY_get1_EC_KEY(pkey);
 202             EVP_PKEY_free(pkey);
 203         }
 204     } else {
 205         if (pubin)
 206             eckey = PEM_read_bio_EC_PUBKEY(in, NULL, NULL, NULL);
 207         else
 208             eckey = PEM_read_bio_ECPrivateKey(in, NULL, NULL, passin);
 209     }
 210     if (eckey == NULL) {
 211         BIO_printf(bio_err, "unable to load Key\n");
 212         ERR_print_errors(bio_err);
 213         goto end;
 214     }
 215
 216     out = bio_open_owner(outfile, outformat, private);
 217     if (out == NULL)
 218         goto end;
 219
 220     group = EC_KEY_get0_group(eckey);
 221
 222     if (new_form)
 223         EC_KEY_set_conv_form(eckey, form);
 224
 225     if (new_asn1_flag)
 226         EC_KEY_set_asn1_flag(eckey, asn1_flag);
 227
 228     if (no_public)
 229         EC_KEY_set_enc_flags(eckey, EC_PKEY_NO_PUBKEY);
 230
 231     if (text) {
 232         assert(pubin || private);
 233         if (!EC_KEY_print(out, eckey, 0)) {
 234             perror(outfile);
 235             ERR_print_errors(bio_err);
 236             goto end;
 237         }
 238     }
 239
 240     if (check) {
 241         if (EC_KEY_check_key(eckey) == 1) {
 242             BIO_printf(bio_err, "EC Key valid.\n");
 243         } else {
 244             BIO_printf(bio_err, "EC Key Invalid!\n");
 245             ERR_print_errors(bio_err);
 246         }
 247     }
 248
 249     if (noout) {
 250         ret = 0;
 251         goto end;
 252     }
 253
 254     BIO_printf(bio_err, "writing EC key\n");
 255     if (outformat == FORMAT_ASN1) {
 256         if (param_out) {
 257             i = i2d_ECPKParameters_bio(out, group);
 258         } else if (pubin || pubout) {
 259             i = i2d_EC_PUBKEY_bio(out, eckey);
 260         } else {
 261             assert(private);
 262             i = i2d_ECPrivateKey_bio(out, eckey);
 263         }
 264     } else {
 265         if (param_out) {
 266             i = PEM_write_bio_ECPKParameters(out, group);
 267         } else if (pubin || pubout) {
 268             i = PEM_write_bio_EC_PUBKEY(out, eckey);
 269         } else {
 270             assert(private);
 271             i = PEM_write_bio_ECPrivateKey(out, eckey, enc,
 272                                            NULL, 0, NULL, passout);
 273         }
 274     }
 275
 276     if (!i) {
 277         BIO_printf(bio_err, "unable to write private key\n");
 278         ERR_print_errors(bio_err);
 279     } else {
 280         ret = 0;
 281     }
 282  end:
 283     BIO_free(in);
 284     BIO_free_all(out);
 285     EC_KEY_free(eckey);
 286     release_engine(e);
 287     OPENSSL_free(passin);
 288     OPENSSL_free(passout);
 289     return ret;
 290 }