451 lines
15 KiB
C
451 lines
15 KiB
C
/*
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* Copyright 2002-2018 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/opensslconf.h>
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#ifdef OPENSSL_NO_EC
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NON_EMPTY_TRANSLATION_UNIT
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#else
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# include <stdio.h>
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# include <stdlib.h>
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# include <time.h>
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# include <string.h>
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# include "apps.h"
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# include "progs.h"
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# include <openssl/bio.h>
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# include <openssl/err.h>
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# include <openssl/bn.h>
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# include <openssl/ec.h>
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# include <openssl/x509.h>
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# include <openssl/pem.h>
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typedef enum OPTION_choice {
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OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT, OPT_C,
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OPT_CHECK, OPT_LIST_CURVES, OPT_NO_SEED, OPT_NOOUT, OPT_NAME,
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OPT_CONV_FORM, OPT_PARAM_ENC, OPT_GENKEY, OPT_ENGINE,
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OPT_R_ENUM
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} OPTION_CHOICE;
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const OPTIONS ecparam_options[] = {
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{"help", OPT_HELP, '-', "Display this summary"},
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{"inform", OPT_INFORM, 'F', "Input format - default PEM (DER or PEM)"},
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{"outform", OPT_OUTFORM, 'F', "Output format - default PEM"},
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{"in", OPT_IN, '<', "Input file - default stdin"},
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{"out", OPT_OUT, '>', "Output file - default stdout"},
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{"text", OPT_TEXT, '-', "Print the ec parameters in text form"},
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{"C", OPT_C, '-', "Print a 'C' function creating the parameters"},
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{"check", OPT_CHECK, '-', "Validate the ec parameters"},
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{"list_curves", OPT_LIST_CURVES, '-',
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"Prints a list of all curve 'short names'"},
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{"no_seed", OPT_NO_SEED, '-',
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"If 'explicit' parameters are chosen do not use the seed"},
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{"noout", OPT_NOOUT, '-', "Do not print the ec parameter"},
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{"name", OPT_NAME, 's',
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"Use the ec parameters with specified 'short name'"},
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{"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "},
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{"param_enc", OPT_PARAM_ENC, 's',
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"Specifies the way the ec parameters are encoded"},
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{"genkey", OPT_GENKEY, '-', "Generate ec key"},
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OPT_R_OPTIONS,
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# ifndef OPENSSL_NO_ENGINE
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{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
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# endif
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{NULL}
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};
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static OPT_PAIR forms[] = {
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{"compressed", POINT_CONVERSION_COMPRESSED},
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{"uncompressed", POINT_CONVERSION_UNCOMPRESSED},
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{"hybrid", POINT_CONVERSION_HYBRID},
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{NULL}
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};
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static OPT_PAIR encodings[] = {
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{"named_curve", OPENSSL_EC_NAMED_CURVE},
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{"explicit", 0},
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{NULL}
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};
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int ecparam_main(int argc, char **argv)
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{
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ENGINE *e = NULL;
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BIGNUM *ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL;
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BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL;
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BIO *in = NULL, *out = NULL;
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EC_GROUP *group = NULL;
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point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
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char *curve_name = NULL;
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char *infile = NULL, *outfile = NULL, *prog;
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unsigned char *buffer = NULL;
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OPTION_CHOICE o;
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int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_asn1_flag = 0;
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int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0, C = 0;
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int ret = 1, private = 0;
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int list_curves = 0, no_seed = 0, check = 0, new_form = 0;
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int text = 0, i, genkey = 0;
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prog = opt_init(argc, argv, ecparam_options);
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while ((o = opt_next()) != OPT_EOF) {
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switch (o) {
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case OPT_EOF:
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case OPT_ERR:
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opthelp:
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BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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goto end;
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case OPT_HELP:
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opt_help(ecparam_options);
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ret = 0;
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goto end;
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case OPT_INFORM:
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if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
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goto opthelp;
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break;
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case OPT_IN:
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infile = opt_arg();
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break;
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case OPT_OUTFORM:
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if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
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goto opthelp;
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break;
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case OPT_OUT:
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outfile = opt_arg();
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break;
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case OPT_TEXT:
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text = 1;
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break;
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case OPT_C:
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C = 1;
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break;
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case OPT_CHECK:
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check = 1;
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break;
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case OPT_LIST_CURVES:
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list_curves = 1;
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break;
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case OPT_NO_SEED:
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no_seed = 1;
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break;
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case OPT_NOOUT:
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noout = 1;
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break;
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case OPT_NAME:
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curve_name = opt_arg();
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break;
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case OPT_CONV_FORM:
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if (!opt_pair(opt_arg(), forms, &new_form))
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goto opthelp;
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form = new_form;
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new_form = 1;
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break;
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case OPT_PARAM_ENC:
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if (!opt_pair(opt_arg(), encodings, &asn1_flag))
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goto opthelp;
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new_asn1_flag = 1;
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break;
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case OPT_GENKEY:
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genkey = 1;
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break;
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case OPT_R_CASES:
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if (!opt_rand(o))
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goto end;
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break;
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case OPT_ENGINE:
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e = setup_engine(opt_arg(), 0);
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break;
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}
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}
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argc = opt_num_rest();
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if (argc != 0)
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goto opthelp;
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private = genkey ? 1 : 0;
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in = bio_open_default(infile, 'r', informat);
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if (in == NULL)
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goto end;
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out = bio_open_owner(outfile, outformat, private);
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if (out == NULL)
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goto end;
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if (list_curves) {
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EC_builtin_curve *curves = NULL;
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size_t crv_len = EC_get_builtin_curves(NULL, 0);
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size_t n;
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curves = app_malloc((int)sizeof(*curves) * crv_len, "list curves");
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if (!EC_get_builtin_curves(curves, crv_len)) {
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OPENSSL_free(curves);
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goto end;
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}
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for (n = 0; n < crv_len; n++) {
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const char *comment;
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const char *sname;
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comment = curves[n].comment;
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sname = OBJ_nid2sn(curves[n].nid);
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if (comment == NULL)
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comment = "CURVE DESCRIPTION NOT AVAILABLE";
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if (sname == NULL)
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sname = "";
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BIO_printf(out, " %-10s: ", sname);
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BIO_printf(out, "%s\n", comment);
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}
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OPENSSL_free(curves);
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ret = 0;
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goto end;
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}
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if (curve_name != NULL) {
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int nid;
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/*
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* workaround for the SECG curve names secp192r1 and secp256r1 (which
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* are the same as the curves prime192v1 and prime256v1 defined in
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* X9.62)
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*/
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if (strcmp(curve_name, "secp192r1") == 0) {
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BIO_printf(bio_err, "using curve name prime192v1 "
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"instead of secp192r1\n");
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nid = NID_X9_62_prime192v1;
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} else if (strcmp(curve_name, "secp256r1") == 0) {
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BIO_printf(bio_err, "using curve name prime256v1 "
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"instead of secp256r1\n");
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nid = NID_X9_62_prime256v1;
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} else {
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nid = OBJ_sn2nid(curve_name);
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}
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if (nid == 0)
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nid = EC_curve_nist2nid(curve_name);
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if (nid == 0) {
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BIO_printf(bio_err, "unknown curve name (%s)\n", curve_name);
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goto end;
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}
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group = EC_GROUP_new_by_curve_name(nid);
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if (group == NULL) {
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BIO_printf(bio_err, "unable to create curve (%s)\n", curve_name);
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goto end;
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}
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EC_GROUP_set_asn1_flag(group, asn1_flag);
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EC_GROUP_set_point_conversion_form(group, form);
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} else if (informat == FORMAT_ASN1) {
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group = d2i_ECPKParameters_bio(in, NULL);
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} else {
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group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
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}
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if (group == NULL) {
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BIO_printf(bio_err, "unable to load elliptic curve parameters\n");
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ERR_print_errors(bio_err);
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goto end;
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}
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if (new_form)
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EC_GROUP_set_point_conversion_form(group, form);
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if (new_asn1_flag)
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EC_GROUP_set_asn1_flag(group, asn1_flag);
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if (no_seed) {
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EC_GROUP_set_seed(group, NULL, 0);
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}
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if (text) {
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if (!ECPKParameters_print(out, group, 0))
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goto end;
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}
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if (check) {
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BIO_printf(bio_err, "checking elliptic curve parameters: ");
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if (!EC_GROUP_check(group, NULL)) {
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BIO_printf(bio_err, "failed\n");
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ERR_print_errors(bio_err);
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goto end;
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}
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BIO_printf(bio_err, "ok\n");
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}
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if (C) {
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size_t buf_len = 0, tmp_len = 0;
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const EC_POINT *point;
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int is_prime, len = 0;
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const EC_METHOD *meth = EC_GROUP_method_of(group);
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if ((ec_p = BN_new()) == NULL
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|| (ec_a = BN_new()) == NULL
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|| (ec_b = BN_new()) == NULL
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|| (ec_gen = BN_new()) == NULL
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|| (ec_order = BN_new()) == NULL
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|| (ec_cofactor = BN_new()) == NULL) {
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perror("Can't allocate BN");
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goto end;
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}
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is_prime = (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field);
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if (!is_prime) {
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BIO_printf(bio_err, "Can only handle X9.62 prime fields\n");
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goto end;
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}
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if (!EC_GROUP_get_curve(group, ec_p, ec_a, ec_b, NULL))
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goto end;
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if ((point = EC_GROUP_get0_generator(group)) == NULL)
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goto end;
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if (!EC_POINT_point2bn(group, point,
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EC_GROUP_get_point_conversion_form(group),
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ec_gen, NULL))
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goto end;
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if (!EC_GROUP_get_order(group, ec_order, NULL))
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goto end;
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if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
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goto end;
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if (!ec_p || !ec_a || !ec_b || !ec_gen || !ec_order || !ec_cofactor)
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goto end;
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len = BN_num_bits(ec_order);
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if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
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buf_len = tmp_len;
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if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
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buf_len = tmp_len;
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if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
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buf_len = tmp_len;
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if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
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buf_len = tmp_len;
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if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
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buf_len = tmp_len;
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if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
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buf_len = tmp_len;
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buffer = app_malloc(buf_len, "BN buffer");
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BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n{\n", len);
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print_bignum_var(out, ec_p, "ec_p", len, buffer);
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print_bignum_var(out, ec_a, "ec_a", len, buffer);
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print_bignum_var(out, ec_b, "ec_b", len, buffer);
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print_bignum_var(out, ec_gen, "ec_gen", len, buffer);
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print_bignum_var(out, ec_order, "ec_order", len, buffer);
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print_bignum_var(out, ec_cofactor, "ec_cofactor", len, buffer);
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BIO_printf(out, " int ok = 0;\n"
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" EC_GROUP *group = NULL;\n"
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" EC_POINT *point = NULL;\n"
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" BIGNUM *tmp_1 = NULL;\n"
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" BIGNUM *tmp_2 = NULL;\n"
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" BIGNUM *tmp_3 = NULL;\n"
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"\n");
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BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_p_%d, sizeof(ec_p_%d), NULL)) == NULL)\n"
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" goto err;\n", len, len);
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BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_a_%d, sizeof(ec_a_%d), NULL)) == NULL)\n"
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" goto err;\n", len, len);
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BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_b_%d, sizeof(ec_b_%d), NULL)) == NULL)\n"
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" goto err;\n", len, len);
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BIO_printf(out, " if ((group = EC_GROUP_new_curve_GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)\n"
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" goto err;\n"
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"\n");
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BIO_printf(out, " /* build generator */\n");
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BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_gen_%d, sizeof(ec_gen_%d), tmp_1)) == NULL)\n"
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" goto err;\n", len, len);
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BIO_printf(out, " point = EC_POINT_bn2point(group, tmp_1, NULL, NULL);\n");
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BIO_printf(out, " if (point == NULL)\n"
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" goto err;\n");
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BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_order_%d, sizeof(ec_order_%d), tmp_2)) == NULL)\n"
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" goto err;\n", len, len);
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BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_cofactor_%d, sizeof(ec_cofactor_%d), tmp_3)) == NULL)\n"
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" goto err;\n", len, len);
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BIO_printf(out, " if (!EC_GROUP_set_generator(group, point, tmp_2, tmp_3))\n"
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" goto err;\n"
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"ok = 1;"
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"\n");
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BIO_printf(out, "err:\n"
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" BN_free(tmp_1);\n"
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" BN_free(tmp_2);\n"
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" BN_free(tmp_3);\n"
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" EC_POINT_free(point);\n"
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" if (!ok) {\n"
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" EC_GROUP_free(group);\n"
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" return NULL;\n"
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" }\n"
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" return (group);\n"
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"}\n");
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}
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if (outformat == FORMAT_ASN1 && genkey)
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noout = 1;
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if (!noout) {
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if (outformat == FORMAT_ASN1)
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i = i2d_ECPKParameters_bio(out, group);
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else
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i = PEM_write_bio_ECPKParameters(out, group);
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if (!i) {
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BIO_printf(bio_err, "unable to write elliptic "
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"curve parameters\n");
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ERR_print_errors(bio_err);
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goto end;
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}
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}
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if (genkey) {
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EC_KEY *eckey = EC_KEY_new();
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if (eckey == NULL)
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goto end;
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if (EC_KEY_set_group(eckey, group) == 0) {
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BIO_printf(bio_err, "unable to set group when generating key\n");
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EC_KEY_free(eckey);
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ERR_print_errors(bio_err);
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goto end;
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}
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if (new_form)
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EC_KEY_set_conv_form(eckey, form);
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if (!EC_KEY_generate_key(eckey)) {
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BIO_printf(bio_err, "unable to generate key\n");
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EC_KEY_free(eckey);
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ERR_print_errors(bio_err);
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goto end;
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}
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assert(private);
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if (outformat == FORMAT_ASN1)
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i = i2d_ECPrivateKey_bio(out, eckey);
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else
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i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
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NULL, 0, NULL, NULL);
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EC_KEY_free(eckey);
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}
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ret = 0;
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end:
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BN_free(ec_p);
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BN_free(ec_a);
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BN_free(ec_b);
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BN_free(ec_gen);
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BN_free(ec_order);
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BN_free(ec_cofactor);
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OPENSSL_free(buffer);
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EC_GROUP_free(group);
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release_engine(e);
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BIO_free(in);
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BIO_free_all(out);
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return ret;
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}
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#endif
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