1 /* 2 * Copyright 2002-2020 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (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 #include <stdio.h> 12 #include <stdlib.h> 13 #include <string.h> 14 #include "apps.h" 15 #include "progs.h" 16 #include <openssl/bio.h> 17 #include <openssl/err.h> 18 #include <openssl/evp.h> 19 #include <openssl/pem.h> 20 21 static OPT_PAIR conv_forms[] = { 22 {"compressed", POINT_CONVERSION_COMPRESSED}, 23 {"uncompressed", POINT_CONVERSION_UNCOMPRESSED}, 24 {"hybrid", POINT_CONVERSION_HYBRID}, 25 {NULL} 26 }; 27 28 static OPT_PAIR param_enc[] = { 29 {"named_curve", OPENSSL_EC_NAMED_CURVE}, 30 {"explicit", 0}, 31 {NULL} 32 }; 33 34 typedef enum OPTION_choice { 35 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, 36 OPT_INFORM, OPT_OUTFORM, OPT_ENGINE, OPT_IN, OPT_OUT, 37 OPT_NOOUT, OPT_TEXT, OPT_PARAM_OUT, OPT_PUBIN, OPT_PUBOUT, 38 OPT_PASSIN, OPT_PASSOUT, OPT_PARAM_ENC, OPT_CONV_FORM, OPT_CIPHER, 39 OPT_NO_PUBLIC, OPT_CHECK 40 } OPTION_CHOICE; 41 42 const OPTIONS ec_options[] = { 43 {"help", OPT_HELP, '-', "Display this summary"}, 44 {"in", OPT_IN, 's', "Input file"}, 45 {"inform", OPT_INFORM, 'f', "Input format - DER or PEM"}, 46 {"out", OPT_OUT, '>', "Output file"}, 47 {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"}, 48 {"noout", OPT_NOOUT, '-', "Don't print key out"}, 49 {"text", OPT_TEXT, '-', "Print the key"}, 50 {"param_out", OPT_PARAM_OUT, '-', "Print the elliptic curve parameters"}, 51 {"pubin", OPT_PUBIN, '-', "Expect a public key in input file"}, 52 {"pubout", OPT_PUBOUT, '-', "Output public key, not private"}, 53 {"no_public", OPT_NO_PUBLIC, '-', "exclude public key from private key"}, 54 {"check", OPT_CHECK, '-', "check key consistency"}, 55 {"passin", OPT_PASSIN, 's', "Input file pass phrase source"}, 56 {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"}, 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 {"", OPT_CIPHER, '-', "Any supported cipher"}, 61 #ifndef OPENSSL_NO_ENGINE 62 {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"}, 63 #endif 64 {NULL} 65 }; 66 67 int ec_main(int argc, char **argv) 68 { 69 BIO *in = NULL, *out = NULL; 70 ENGINE *e = NULL; 71 EC_KEY *eckey = NULL; 72 const EC_GROUP *group; 73 const EVP_CIPHER *enc = NULL; 74 point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED; 75 char *infile = NULL, *outfile = NULL, *prog; 76 char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL; 77 OPTION_CHOICE o; 78 int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_form = 0, new_asn1_flag = 0; 79 int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, noout = 0; 80 int pubin = 0, pubout = 0, param_out = 0, i, ret = 1, private = 0; 81 int no_public = 0, check = 0; 82 83 prog = opt_init(argc, argv, ec_options); 84 while ((o = opt_next()) != OPT_EOF) { 85 switch (o) { 86 case OPT_EOF: 87 case OPT_ERR: 88 opthelp: 89 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); 90 goto end; 91 case OPT_HELP: 92 opt_help(ec_options); 93 ret = 0; 94 goto end; 95 case OPT_INFORM: 96 if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat)) 97 goto opthelp; 98 break; 99 case OPT_IN: 100 infile = opt_arg(); 101 break; 102 case OPT_OUTFORM: 103 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat)) 104 goto opthelp; 105 break; 106 case OPT_OUT: 107 outfile = opt_arg(); 108 break; 109 case OPT_NOOUT: 110 noout = 1; 111 break; 112 case OPT_TEXT: 113 text = 1; 114 break; 115 case OPT_PARAM_OUT: 116 param_out = 1; 117 break; 118 case OPT_PUBIN: 119 pubin = 1; 120 break; 121 case OPT_PUBOUT: 122 pubout = 1; 123 break; 124 case OPT_PASSIN: 125 passinarg = opt_arg(); 126 break; 127 case OPT_PASSOUT: 128 passoutarg = opt_arg(); 129 break; 130 case OPT_ENGINE: 131 e = setup_engine(opt_arg(), 0); 132 break; 133 case OPT_CIPHER: 134 if (!opt_cipher(opt_unknown(), &enc)) 135 goto opthelp; 136 break; 137 case OPT_CONV_FORM: 138 if (!opt_pair(opt_arg(), conv_forms, &i)) 139 goto opthelp; 140 new_form = 1; 141 form = i; 142 break; 143 case OPT_PARAM_ENC: 144 if (!opt_pair(opt_arg(), param_enc, &i)) 145 goto opthelp; 146 new_asn1_flag = 1; 147 asn1_flag = i; 148 break; 149 case OPT_NO_PUBLIC: 150 no_public = 1; 151 break; 152 case OPT_CHECK: 153 check = 1; 154 break; 155 } 156 } 157 argc = opt_num_rest(); 158 if (argc != 0) 159 goto opthelp; 160 161 private = param_out || pubin || pubout ? 0 : 1; 162 if (text && !pubin) 163 private = 1; 164 165 if (!app_passwd(passinarg, passoutarg, &passin, &passout)) { 166 BIO_printf(bio_err, "Error getting passwords\n"); 167 goto end; 168 } 169 170 if (informat != FORMAT_ENGINE) { 171 in = bio_open_default(infile, 'r', informat); 172 if (in == NULL) 173 goto end; 174 } 175 176 BIO_printf(bio_err, "read EC key\n"); 177 if (informat == FORMAT_ASN1) { 178 if (pubin) 179 eckey = d2i_EC_PUBKEY_bio(in, NULL); 180 else 181 eckey = d2i_ECPrivateKey_bio(in, NULL); 182 } else if (informat == FORMAT_ENGINE) { 183 EVP_PKEY *pkey; 184 if (pubin) 185 pkey = load_pubkey(infile, informat, 1, passin, e, "Public Key"); 186 else 187 pkey = load_key(infile, informat, 1, passin, e, "Private Key"); 188 if (pkey != NULL) { 189 eckey = EVP_PKEY_get1_EC_KEY(pkey); 190 EVP_PKEY_free(pkey); 191 } 192 } else { 193 if (pubin) 194 eckey = PEM_read_bio_EC_PUBKEY(in, NULL, NULL, NULL); 195 else 196 eckey = PEM_read_bio_ECPrivateKey(in, NULL, NULL, passin); 197 } 198 if (eckey == NULL) { 199 BIO_printf(bio_err, "unable to load Key\n"); 200 ERR_print_errors(bio_err); 201 goto end; 202 } 203 204 out = bio_open_owner(outfile, outformat, private); 205 if (out == NULL) 206 goto end; 207 208 group = EC_KEY_get0_group(eckey); 209 210 if (new_form) 211 EC_KEY_set_conv_form(eckey, form); 212 213 if (new_asn1_flag) 214 EC_KEY_set_asn1_flag(eckey, asn1_flag); 215 216 if (no_public) 217 EC_KEY_set_enc_flags(eckey, EC_PKEY_NO_PUBKEY); 218 219 if (text) { 220 assert(pubin || private); 221 if (!EC_KEY_print(out, eckey, 0)) { 222 perror(outfile); 223 ERR_print_errors(bio_err); 224 goto end; 225 } 226 } 227 228 if (check) { 229 if (EC_KEY_check_key(eckey) == 1) { 230 BIO_printf(bio_err, "EC Key valid.\n"); 231 } else { 232 BIO_printf(bio_err, "EC Key Invalid!\n"); 233 ERR_print_errors(bio_err); 234 } 235 } 236 237 if (noout) { 238 ret = 0; 239 goto end; 240 } 241 242 BIO_printf(bio_err, "writing EC key\n"); 243 if (outformat == FORMAT_ASN1) { 244 if (param_out) { 245 i = i2d_ECPKParameters_bio(out, group); 246 } else if (pubin || pubout) { 247 i = i2d_EC_PUBKEY_bio(out, eckey); 248 } else { 249 assert(private); 250 i = i2d_ECPrivateKey_bio(out, eckey); 251 } 252 } else { 253 if (param_out) { 254 i = PEM_write_bio_ECPKParameters(out, group); 255 } else if (pubin || pubout) { 256 i = PEM_write_bio_EC_PUBKEY(out, eckey); 257 } else { 258 assert(private); 259 i = PEM_write_bio_ECPrivateKey(out, eckey, enc, 260 NULL, 0, NULL, passout); 261 } 262 } 263 264 if (!i) { 265 BIO_printf(bio_err, "unable to write private key\n"); 266 ERR_print_errors(bio_err); 267 } else { 268 ret = 0; 269 } 270 end: 271 BIO_free(in); 272 BIO_free_all(out); 273 EC_KEY_free(eckey); 274 release_engine(e); 275 OPENSSL_free(passin); 276 OPENSSL_free(passout); 277 return ret; 278 } 279