[331] | 1 | /*
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| 2 | * Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | /* ====================================================================
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| 11 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
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| 12 | *
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| 13 | * Portions of the attached software ("Contribution") are developed by
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| 14 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
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| 15 | *
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| 16 | * The Contribution is licensed pursuant to the OpenSSL open source
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| 17 | * license provided above.
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| 18 | *
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| 19 | * The elliptic curve binary polynomial software is originally written by
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| 20 | * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories.
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| 21 | *
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| 22 | */
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| 23 |
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| 24 | #include <openssl/opensslconf.h>
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| 25 | #ifdef OPENSSL_NO_EC
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| 26 | NON_EMPTY_TRANSLATION_UNIT
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| 27 | #else
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| 28 |
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| 29 | # include <stdio.h>
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| 30 | # include <stdlib.h>
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| 31 | # include <time.h>
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| 32 | # include <string.h>
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| 33 | # include "apps.h"
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| 34 | # include <openssl/bio.h>
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| 35 | # include <openssl/err.h>
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| 36 | # include <openssl/bn.h>
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| 37 | # include <openssl/ec.h>
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| 38 | # include <openssl/x509.h>
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| 39 | # include <openssl/pem.h>
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| 40 |
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| 41 | typedef enum OPTION_choice {
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| 42 | OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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| 43 | OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT, OPT_C,
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| 44 | OPT_CHECK, OPT_LIST_CURVES, OPT_NO_SEED, OPT_NOOUT, OPT_NAME,
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| 45 | OPT_CONV_FORM, OPT_PARAM_ENC, OPT_GENKEY, OPT_RAND, OPT_ENGINE
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| 46 | } OPTION_CHOICE;
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| 47 |
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| 48 | OPTIONS ecparam_options[] = {
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| 49 | {"help", OPT_HELP, '-', "Display this summary"},
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| 50 | {"inform", OPT_INFORM, 'F', "Input format - default PEM (DER or PEM)"},
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| 51 | {"outform", OPT_OUTFORM, 'F', "Output format - default PEM"},
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| 52 | {"in", OPT_IN, '<', "Input file - default stdin"},
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| 53 | {"out", OPT_OUT, '>', "Output file - default stdout"},
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| 54 | {"text", OPT_TEXT, '-', "Print the ec parameters in text form"},
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| 55 | {"C", OPT_C, '-', "Print a 'C' function creating the parameters"},
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| 56 | {"check", OPT_CHECK, '-', "Validate the ec parameters"},
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| 57 | {"list_curves", OPT_LIST_CURVES, '-',
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| 58 | "Prints a list of all curve 'short names'"},
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| 59 | {"no_seed", OPT_NO_SEED, '-',
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| 60 | "If 'explicit' parameters are chosen do not use the seed"},
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| 61 | {"noout", OPT_NOOUT, '-', "Do not print the ec parameter"},
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| 62 | {"name", OPT_NAME, 's',
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| 63 | "Use the ec parameters with specified 'short name'"},
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| 64 | {"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "},
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| 65 | {"param_enc", OPT_PARAM_ENC, 's',
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| 66 | "Specifies the way the ec parameters are encoded"},
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| 67 | {"genkey", OPT_GENKEY, '-', "Generate ec key"},
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| 68 | {"rand", OPT_RAND, 's', "Files to use for random number input"},
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| 69 | # ifndef OPENSSL_NO_ENGINE
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| 70 | {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
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| 71 | # endif
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| 72 | {NULL}
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| 73 | };
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| 74 |
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| 75 | static OPT_PAIR forms[] = {
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| 76 | {"compressed", POINT_CONVERSION_COMPRESSED},
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| 77 | {"uncompressed", POINT_CONVERSION_UNCOMPRESSED},
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| 78 | {"hybrid", POINT_CONVERSION_HYBRID},
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| 79 | {NULL}
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| 80 | };
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| 81 |
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| 82 | static OPT_PAIR encodings[] = {
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| 83 | {"named_curve", OPENSSL_EC_NAMED_CURVE},
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| 84 | {"explicit", 0},
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| 85 | {NULL}
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| 86 | };
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| 87 |
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| 88 | int ecparam_main(int argc, char **argv)
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| 89 | {
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| 90 | ENGINE *e = NULL;
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| 91 | BIGNUM *ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL;
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| 92 | BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL;
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| 93 | BIO *in = NULL, *out = NULL;
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| 94 | EC_GROUP *group = NULL;
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| 95 | point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
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| 96 | char *curve_name = NULL, *inrand = NULL;
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| 97 | char *infile = NULL, *outfile = NULL, *prog;
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| 98 | unsigned char *buffer = NULL;
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| 99 | OPTION_CHOICE o;
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| 100 | int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_asn1_flag = 0;
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| 101 | int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0, C = 0;
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| 102 | int ret = 1, private = 0;
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| 103 | int list_curves = 0, no_seed = 0, check = 0, new_form = 0;
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| 104 | int text = 0, i, need_rand = 0, genkey = 0;
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| 105 |
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| 106 | prog = opt_init(argc, argv, ecparam_options);
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| 107 | while ((o = opt_next()) != OPT_EOF) {
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| 108 | switch (o) {
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| 109 | case OPT_EOF:
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| 110 | case OPT_ERR:
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| 111 | opthelp:
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| 112 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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| 113 | goto end;
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| 114 | case OPT_HELP:
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| 115 | opt_help(ecparam_options);
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| 116 | ret = 0;
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| 117 | goto end;
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| 118 | case OPT_INFORM:
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| 119 | if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
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| 120 | goto opthelp;
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| 121 | break;
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| 122 | case OPT_IN:
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| 123 | infile = opt_arg();
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| 124 | break;
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| 125 | case OPT_OUTFORM:
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| 126 | if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
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| 127 | goto opthelp;
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| 128 | break;
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| 129 | case OPT_OUT:
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| 130 | outfile = opt_arg();
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| 131 | break;
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| 132 | case OPT_TEXT:
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| 133 | text = 1;
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| 134 | break;
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| 135 | case OPT_C:
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| 136 | C = 1;
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| 137 | break;
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| 138 | case OPT_CHECK:
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| 139 | check = 1;
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| 140 | break;
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| 141 | case OPT_LIST_CURVES:
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| 142 | list_curves = 1;
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| 143 | break;
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| 144 | case OPT_NO_SEED:
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| 145 | no_seed = 1;
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| 146 | break;
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| 147 | case OPT_NOOUT:
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| 148 | noout = 1;
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| 149 | break;
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| 150 | case OPT_NAME:
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| 151 | curve_name = opt_arg();
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| 152 | break;
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| 153 | case OPT_CONV_FORM:
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| 154 | if (!opt_pair(opt_arg(), forms, &new_form))
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| 155 | goto opthelp;
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| 156 | form = new_form;
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| 157 | new_form = 1;
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| 158 | break;
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| 159 | case OPT_PARAM_ENC:
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| 160 | if (!opt_pair(opt_arg(), encodings, &asn1_flag))
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| 161 | goto opthelp;
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| 162 | new_asn1_flag = 1;
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| 163 | break;
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| 164 | case OPT_GENKEY:
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| 165 | genkey = need_rand = 1;
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| 166 | break;
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| 167 | case OPT_RAND:
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| 168 | inrand = opt_arg();
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| 169 | need_rand = 1;
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| 170 | break;
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| 171 | case OPT_ENGINE:
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| 172 | e = setup_engine(opt_arg(), 0);
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| 173 | break;
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| 174 | }
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| 175 | }
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| 176 | argc = opt_num_rest();
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| 177 | if (argc != 0)
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| 178 | goto opthelp;
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| 179 |
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| 180 | private = genkey ? 1 : 0;
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| 181 |
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| 182 | in = bio_open_default(infile, 'r', informat);
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| 183 | if (in == NULL)
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| 184 | goto end;
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| 185 | out = bio_open_owner(outfile, outformat, private);
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| 186 | if (out == NULL)
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| 187 | goto end;
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| 188 |
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| 189 | if (list_curves) {
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| 190 | EC_builtin_curve *curves = NULL;
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| 191 | size_t crv_len = EC_get_builtin_curves(NULL, 0);
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| 192 | size_t n;
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| 193 |
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| 194 | curves = app_malloc((int)sizeof(*curves) * crv_len, "list curves");
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| 195 | if (!EC_get_builtin_curves(curves, crv_len)) {
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| 196 | OPENSSL_free(curves);
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| 197 | goto end;
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| 198 | }
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| 199 |
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| 200 | for (n = 0; n < crv_len; n++) {
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| 201 | const char *comment;
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| 202 | const char *sname;
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| 203 | comment = curves[n].comment;
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| 204 | sname = OBJ_nid2sn(curves[n].nid);
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| 205 | if (comment == NULL)
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| 206 | comment = "CURVE DESCRIPTION NOT AVAILABLE";
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| 207 | if (sname == NULL)
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| 208 | sname = "";
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| 209 |
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| 210 | BIO_printf(out, " %-10s: ", sname);
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| 211 | BIO_printf(out, "%s\n", comment);
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| 212 | }
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| 213 |
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| 214 | OPENSSL_free(curves);
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| 215 | ret = 0;
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| 216 | goto end;
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| 217 | }
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| 218 |
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| 219 | if (curve_name != NULL) {
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| 220 | int nid;
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| 221 |
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| 222 | /*
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| 223 | * workaround for the SECG curve names secp192r1 and secp256r1 (which
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| 224 | * are the same as the curves prime192v1 and prime256v1 defined in
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| 225 | * X9.62)
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| 226 | */
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| 227 | if (strcmp(curve_name, "secp192r1") == 0) {
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| 228 | BIO_printf(bio_err, "using curve name prime192v1 "
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| 229 | "instead of secp192r1\n");
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| 230 | nid = NID_X9_62_prime192v1;
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| 231 | } else if (strcmp(curve_name, "secp256r1") == 0) {
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| 232 | BIO_printf(bio_err, "using curve name prime256v1 "
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| 233 | "instead of secp256r1\n");
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| 234 | nid = NID_X9_62_prime256v1;
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| 235 | } else
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| 236 | nid = OBJ_sn2nid(curve_name);
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| 237 |
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| 238 | if (nid == 0)
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| 239 | nid = EC_curve_nist2nid(curve_name);
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| 240 |
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| 241 | if (nid == 0) {
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| 242 | BIO_printf(bio_err, "unknown curve name (%s)\n", curve_name);
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| 243 | goto end;
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| 244 | }
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| 245 |
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| 246 | group = EC_GROUP_new_by_curve_name(nid);
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| 247 | if (group == NULL) {
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| 248 | BIO_printf(bio_err, "unable to create curve (%s)\n", curve_name);
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| 249 | goto end;
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| 250 | }
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| 251 | EC_GROUP_set_asn1_flag(group, asn1_flag);
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| 252 | EC_GROUP_set_point_conversion_form(group, form);
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| 253 | } else if (informat == FORMAT_ASN1)
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| 254 | group = d2i_ECPKParameters_bio(in, NULL);
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| 255 | else
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| 256 | group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
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| 257 | if (group == NULL) {
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| 258 | BIO_printf(bio_err, "unable to load elliptic curve parameters\n");
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| 259 | ERR_print_errors(bio_err);
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| 260 | goto end;
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| 261 | }
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| 262 |
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| 263 | if (new_form)
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| 264 | EC_GROUP_set_point_conversion_form(group, form);
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| 265 |
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| 266 | if (new_asn1_flag)
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| 267 | EC_GROUP_set_asn1_flag(group, asn1_flag);
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| 268 |
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| 269 | if (no_seed) {
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| 270 | EC_GROUP_set_seed(group, NULL, 0);
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| 271 | }
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| 272 |
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| 273 | if (text) {
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| 274 | if (!ECPKParameters_print(out, group, 0))
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| 275 | goto end;
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| 276 | }
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| 277 |
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| 278 | if (check) {
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| 279 | BIO_printf(bio_err, "checking elliptic curve parameters: ");
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| 280 | if (!EC_GROUP_check(group, NULL)) {
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| 281 | BIO_printf(bio_err, "failed\n");
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| 282 | ERR_print_errors(bio_err);
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| 283 | goto end;
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| 284 | }
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| 285 | BIO_printf(bio_err, "ok\n");
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| 286 |
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| 287 | }
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| 288 |
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| 289 | if (C) {
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| 290 | size_t buf_len = 0, tmp_len = 0;
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| 291 | const EC_POINT *point;
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| 292 | int is_prime, len = 0;
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| 293 | const EC_METHOD *meth = EC_GROUP_method_of(group);
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| 294 |
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| 295 | if ((ec_p = BN_new()) == NULL
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| 296 | || (ec_a = BN_new()) == NULL
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| 297 | || (ec_b = BN_new()) == NULL
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| 298 | || (ec_gen = BN_new()) == NULL
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| 299 | || (ec_order = BN_new()) == NULL
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| 300 | || (ec_cofactor = BN_new()) == NULL) {
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| 301 | perror("Can't allocate BN");
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| 302 | goto end;
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| 303 | }
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| 304 |
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| 305 | is_prime = (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field);
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| 306 | if (!is_prime) {
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| 307 | BIO_printf(bio_err, "Can only handle X9.62 prime fields\n");
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| 308 | goto end;
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| 309 | }
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| 310 |
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| 311 | if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a, ec_b, NULL))
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| 312 | goto end;
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| 313 |
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| 314 | if ((point = EC_GROUP_get0_generator(group)) == NULL)
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| 315 | goto end;
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| 316 | if (!EC_POINT_point2bn(group, point,
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| 317 | EC_GROUP_get_point_conversion_form(group),
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| 318 | ec_gen, NULL))
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| 319 | goto end;
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| 320 | if (!EC_GROUP_get_order(group, ec_order, NULL))
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| 321 | goto end;
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| 322 | if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
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| 323 | goto end;
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| 324 |
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| 325 | if (!ec_p || !ec_a || !ec_b || !ec_gen || !ec_order || !ec_cofactor)
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| 326 | goto end;
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| 327 |
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| 328 | len = BN_num_bits(ec_order);
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| 329 |
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| 330 | if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
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| 331 | buf_len = tmp_len;
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| 332 | if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
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| 333 | buf_len = tmp_len;
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| 334 | if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
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| 335 | buf_len = tmp_len;
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| 336 | if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
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| 337 | buf_len = tmp_len;
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| 338 | if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
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| 339 | buf_len = tmp_len;
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| 340 | if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
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| 341 | buf_len = tmp_len;
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| 342 |
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| 343 | buffer = app_malloc(buf_len, "BN buffer");
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| 344 |
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| 345 | BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n{\n", len);
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| 346 | print_bignum_var(out, ec_p, "ec_p", len, buffer);
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| 347 | print_bignum_var(out, ec_a, "ec_a", len, buffer);
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| 348 | print_bignum_var(out, ec_b, "ec_b", len, buffer);
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| 349 | print_bignum_var(out, ec_gen, "ec_gen", len, buffer);
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| 350 | print_bignum_var(out, ec_order, "ec_order", len, buffer);
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| 351 | print_bignum_var(out, ec_cofactor, "ec_cofactor", len, buffer);
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| 352 | BIO_printf(out, " int ok = 0;\n"
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| 353 | " EC_GROUP *group = NULL;\n"
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| 354 | " EC_POINT *point = NULL;\n"
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| 355 | " BIGNUM *tmp_1 = NULL;\n"
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| 356 | " BIGNUM *tmp_2 = NULL;\n"
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| 357 | " BIGNUM *tmp_3 = NULL;\n"
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| 358 | "\n");
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| 359 |
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| 360 | BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_p_%d, sizeof (ec_p_%d), NULL)) == NULL)\n"
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| 361 | " goto err;\n", len, len);
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| 362 | BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_a_%d, sizeof (ec_a_%d), NULL)) == NULL)\n"
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| 363 | " goto err;\n", len, len);
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| 364 | BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_b_%d, sizeof (ec_b_%d), NULL)) == NULL)\n"
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| 365 | " goto err;\n", len, len);
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| 366 | BIO_printf(out, " if ((group = EC_GROUP_new_curve_GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)\n"
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| 367 | " goto err;\n"
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| 368 | "\n");
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| 369 | BIO_printf(out, " /* build generator */\n");
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| 370 | BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_gen_%d, sizeof (ec_gen_%d), tmp_1)) == NULL)\n"
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| 371 | " goto err;\n", len, len);
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| 372 | BIO_printf(out, " point = EC_POINT_bn2point(group, tmp_1, NULL, NULL);\n");
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| 373 | BIO_printf(out, " if (point == NULL)\n"
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| 374 | " goto err;\n");
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| 375 | BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_order_%d, sizeof (ec_order_%d), tmp_2)) == NULL)\n"
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| 376 | " goto err;\n", len, len);
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| 377 | BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_cofactor_%d, sizeof (ec_cofactor_%d), tmp_3)) == NULL)\n"
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| 378 | " goto err;\n", len, len);
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| 379 | BIO_printf(out, " if (!EC_GROUP_set_generator(group, point, tmp_2, tmp_3))\n"
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| 380 | " goto err;\n"
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| 381 | "ok = 1;"
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| 382 | "\n");
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| 383 | BIO_printf(out, "err:\n"
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| 384 | " BN_free(tmp_1);\n"
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| 385 | " BN_free(tmp_2);\n"
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| 386 | " BN_free(tmp_3);\n"
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| 387 | " EC_POINT_free(point);\n"
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| 388 | " if (!ok) {\n"
|
---|
| 389 | " EC_GROUP_free(group);\n"
|
---|
| 390 | " return NULL;\n"
|
---|
| 391 | " }\n"
|
---|
| 392 | " return (group);\n"
|
---|
| 393 | "}\n");
|
---|
| 394 | }
|
---|
| 395 |
|
---|
| 396 | if (!noout) {
|
---|
| 397 | if (outformat == FORMAT_ASN1)
|
---|
| 398 | i = i2d_ECPKParameters_bio(out, group);
|
---|
| 399 | else
|
---|
| 400 | i = PEM_write_bio_ECPKParameters(out, group);
|
---|
| 401 | if (!i) {
|
---|
| 402 | BIO_printf(bio_err, "unable to write elliptic "
|
---|
| 403 | "curve parameters\n");
|
---|
| 404 | ERR_print_errors(bio_err);
|
---|
| 405 | goto end;
|
---|
| 406 | }
|
---|
| 407 | }
|
---|
| 408 |
|
---|
| 409 | if (need_rand) {
|
---|
| 410 | app_RAND_load_file(NULL, (inrand != NULL));
|
---|
| 411 | if (inrand != NULL)
|
---|
| 412 | BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
|
---|
| 413 | app_RAND_load_files(inrand));
|
---|
| 414 | }
|
---|
| 415 |
|
---|
| 416 | if (genkey) {
|
---|
| 417 | EC_KEY *eckey = EC_KEY_new();
|
---|
| 418 |
|
---|
| 419 | if (eckey == NULL)
|
---|
| 420 | goto end;
|
---|
| 421 |
|
---|
| 422 | assert(need_rand);
|
---|
| 423 |
|
---|
| 424 | if (EC_KEY_set_group(eckey, group) == 0) {
|
---|
| 425 | BIO_printf(bio_err, "unable to set group when generating key\n");
|
---|
| 426 | EC_KEY_free(eckey);
|
---|
| 427 | ERR_print_errors(bio_err);
|
---|
| 428 | goto end;
|
---|
| 429 | }
|
---|
| 430 |
|
---|
| 431 | if (!EC_KEY_generate_key(eckey)) {
|
---|
| 432 | BIO_printf(bio_err, "unable to generate key\n");
|
---|
| 433 | EC_KEY_free(eckey);
|
---|
| 434 | ERR_print_errors(bio_err);
|
---|
| 435 | goto end;
|
---|
| 436 | }
|
---|
| 437 | assert(private);
|
---|
| 438 | if (outformat == FORMAT_ASN1)
|
---|
| 439 | i = i2d_ECPrivateKey_bio(out, eckey);
|
---|
| 440 | else
|
---|
| 441 | i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
|
---|
| 442 | NULL, 0, NULL, NULL);
|
---|
| 443 | EC_KEY_free(eckey);
|
---|
| 444 | }
|
---|
| 445 |
|
---|
| 446 | if (need_rand)
|
---|
| 447 | app_RAND_write_file(NULL);
|
---|
| 448 |
|
---|
| 449 | ret = 0;
|
---|
| 450 | end:
|
---|
| 451 | BN_free(ec_p);
|
---|
| 452 | BN_free(ec_a);
|
---|
| 453 | BN_free(ec_b);
|
---|
| 454 | BN_free(ec_gen);
|
---|
| 455 | BN_free(ec_order);
|
---|
| 456 | BN_free(ec_cofactor);
|
---|
| 457 | OPENSSL_free(buffer);
|
---|
| 458 | EC_GROUP_free(group);
|
---|
| 459 | release_engine(e);
|
---|
| 460 | BIO_free(in);
|
---|
| 461 | BIO_free_all(out);
|
---|
| 462 | return (ret);
|
---|
| 463 | }
|
---|
| 464 |
|
---|
| 465 | #endif
|
---|