| /* |
| * Copyright 2002-2020 The OpenSSL Project Authors. All Rights Reserved. |
| * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved |
| * |
| * Licensed under the OpenSSL license (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include <openssl/opensslconf.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <time.h> |
| #include <string.h> |
| #include "apps.h" |
| #include "progs.h" |
| #include <openssl/bio.h> |
| #include <openssl/err.h> |
| #include <openssl/bn.h> |
| #include <openssl/ec.h> |
| #include <openssl/x509.h> |
| #include <openssl/pem.h> |
| |
| typedef enum OPTION_choice { |
| OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, |
| OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT, OPT_C, |
| OPT_CHECK, OPT_LIST_CURVES, OPT_NO_SEED, OPT_NOOUT, OPT_NAME, |
| OPT_CONV_FORM, OPT_PARAM_ENC, OPT_GENKEY, OPT_ENGINE, |
| OPT_R_ENUM |
| } OPTION_CHOICE; |
| |
| const OPTIONS ecparam_options[] = { |
| {"help", OPT_HELP, '-', "Display this summary"}, |
| {"inform", OPT_INFORM, 'F', "Input format - default PEM (DER or PEM)"}, |
| {"outform", OPT_OUTFORM, 'F', "Output format - default PEM"}, |
| {"in", OPT_IN, '<', "Input file - default stdin"}, |
| {"out", OPT_OUT, '>', "Output file - default stdout"}, |
| {"text", OPT_TEXT, '-', "Print the ec parameters in text form"}, |
| {"C", OPT_C, '-', "Print a 'C' function creating the parameters"}, |
| {"check", OPT_CHECK, '-', "Validate the ec parameters"}, |
| {"list_curves", OPT_LIST_CURVES, '-', |
| "Prints a list of all curve 'short names'"}, |
| {"no_seed", OPT_NO_SEED, '-', |
| "If 'explicit' parameters are chosen do not use the seed"}, |
| {"noout", OPT_NOOUT, '-', "Do not print the ec parameter"}, |
| {"name", OPT_NAME, 's', |
| "Use the ec parameters with specified 'short name'"}, |
| {"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "}, |
| {"param_enc", OPT_PARAM_ENC, 's', |
| "Specifies the way the ec parameters are encoded"}, |
| {"genkey", OPT_GENKEY, '-', "Generate ec key"}, |
| OPT_R_OPTIONS, |
| #ifndef OPENSSL_NO_ENGINE |
| {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"}, |
| #endif |
| {NULL} |
| }; |
| |
| static OPT_PAIR forms[] = { |
| {"compressed", POINT_CONVERSION_COMPRESSED}, |
| {"uncompressed", POINT_CONVERSION_UNCOMPRESSED}, |
| {"hybrid", POINT_CONVERSION_HYBRID}, |
| {NULL} |
| }; |
| |
| static OPT_PAIR encodings[] = { |
| {"named_curve", OPENSSL_EC_NAMED_CURVE}, |
| {"explicit", 0}, |
| {NULL} |
| }; |
| |
| int ecparam_main(int argc, char **argv) |
| { |
| ENGINE *e = NULL; |
| BIGNUM *ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL; |
| BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL; |
| BIO *in = NULL, *out = NULL; |
| EC_GROUP *group = NULL; |
| point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED; |
| char *curve_name = NULL; |
| char *infile = NULL, *outfile = NULL, *prog; |
| unsigned char *buffer = NULL; |
| OPTION_CHOICE o; |
| int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_asn1_flag = 0; |
| int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0, C = 0; |
| int ret = 1, private = 0; |
| int list_curves = 0, no_seed = 0, check = 0, new_form = 0; |
| int text = 0, i, genkey = 0; |
| |
| prog = opt_init(argc, argv, ecparam_options); |
| while ((o = opt_next()) != OPT_EOF) { |
| switch (o) { |
| case OPT_EOF: |
| case OPT_ERR: |
| opthelp: |
| BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); |
| goto end; |
| case OPT_HELP: |
| opt_help(ecparam_options); |
| ret = 0; |
| goto end; |
| case OPT_INFORM: |
| if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat)) |
| goto opthelp; |
| break; |
| case OPT_IN: |
| infile = opt_arg(); |
| break; |
| case OPT_OUTFORM: |
| if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat)) |
| goto opthelp; |
| break; |
| case OPT_OUT: |
| outfile = opt_arg(); |
| break; |
| case OPT_TEXT: |
| text = 1; |
| break; |
| case OPT_C: |
| C = 1; |
| break; |
| case OPT_CHECK: |
| check = 1; |
| break; |
| case OPT_LIST_CURVES: |
| list_curves = 1; |
| break; |
| case OPT_NO_SEED: |
| no_seed = 1; |
| break; |
| case OPT_NOOUT: |
| noout = 1; |
| break; |
| case OPT_NAME: |
| curve_name = opt_arg(); |
| break; |
| case OPT_CONV_FORM: |
| if (!opt_pair(opt_arg(), forms, &new_form)) |
| goto opthelp; |
| form = new_form; |
| new_form = 1; |
| break; |
| case OPT_PARAM_ENC: |
| if (!opt_pair(opt_arg(), encodings, &asn1_flag)) |
| goto opthelp; |
| new_asn1_flag = 1; |
| break; |
| case OPT_GENKEY: |
| genkey = 1; |
| break; |
| case OPT_R_CASES: |
| if (!opt_rand(o)) |
| goto end; |
| break; |
| case OPT_ENGINE: |
| e = setup_engine(opt_arg(), 0); |
| break; |
| } |
| } |
| argc = opt_num_rest(); |
| if (argc != 0) |
| goto opthelp; |
| |
| private = genkey ? 1 : 0; |
| |
| in = bio_open_default(infile, 'r', informat); |
| if (in == NULL) |
| goto end; |
| out = bio_open_owner(outfile, outformat, private); |
| if (out == NULL) |
| goto end; |
| |
| if (list_curves) { |
| EC_builtin_curve *curves = NULL; |
| size_t crv_len = EC_get_builtin_curves(NULL, 0); |
| size_t n; |
| |
| curves = app_malloc((int)sizeof(*curves) * crv_len, "list curves"); |
| if (!EC_get_builtin_curves(curves, crv_len)) { |
| OPENSSL_free(curves); |
| goto end; |
| } |
| |
| for (n = 0; n < crv_len; n++) { |
| const char *comment; |
| const char *sname; |
| comment = curves[n].comment; |
| sname = OBJ_nid2sn(curves[n].nid); |
| if (comment == NULL) |
| comment = "CURVE DESCRIPTION NOT AVAILABLE"; |
| if (sname == NULL) |
| sname = ""; |
| |
| BIO_printf(out, " %-10s: ", sname); |
| BIO_printf(out, "%s\n", comment); |
| } |
| |
| OPENSSL_free(curves); |
| ret = 0; |
| goto end; |
| } |
| |
| if (curve_name != NULL) { |
| int nid; |
| |
| /* |
| * workaround for the SECG curve names secp192r1 and secp256r1 (which |
| * are the same as the curves prime192v1 and prime256v1 defined in |
| * X9.62) |
| */ |
| if (strcmp(curve_name, "secp192r1") == 0) { |
| BIO_printf(bio_err, "using curve name prime192v1 " |
| "instead of secp192r1\n"); |
| nid = NID_X9_62_prime192v1; |
| } else if (strcmp(curve_name, "secp256r1") == 0) { |
| BIO_printf(bio_err, "using curve name prime256v1 " |
| "instead of secp256r1\n"); |
| nid = NID_X9_62_prime256v1; |
| } else { |
| nid = OBJ_sn2nid(curve_name); |
| } |
| |
| if (nid == 0) |
| nid = EC_curve_nist2nid(curve_name); |
| |
| if (nid == 0) { |
| BIO_printf(bio_err, "unknown curve name (%s)\n", curve_name); |
| goto end; |
| } |
| |
| group = EC_GROUP_new_by_curve_name(nid); |
| if (group == NULL) { |
| BIO_printf(bio_err, "unable to create curve (%s)\n", curve_name); |
| goto end; |
| } |
| EC_GROUP_set_asn1_flag(group, asn1_flag); |
| EC_GROUP_set_point_conversion_form(group, form); |
| } else if (informat == FORMAT_ASN1) { |
| group = d2i_ECPKParameters_bio(in, NULL); |
| } else { |
| group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL); |
| } |
| if (group == NULL) { |
| BIO_printf(bio_err, "unable to load elliptic curve parameters\n"); |
| ERR_print_errors(bio_err); |
| goto end; |
| } |
| |
| if (new_form) |
| EC_GROUP_set_point_conversion_form(group, form); |
| |
| if (new_asn1_flag) |
| EC_GROUP_set_asn1_flag(group, asn1_flag); |
| |
| if (no_seed) { |
| EC_GROUP_set_seed(group, NULL, 0); |
| } |
| |
| if (text) { |
| if (!ECPKParameters_print(out, group, 0)) |
| goto end; |
| } |
| |
| if (check) { |
| BIO_printf(bio_err, "checking elliptic curve parameters: "); |
| if (!EC_GROUP_check(group, NULL)) { |
| BIO_printf(bio_err, "failed\n"); |
| ERR_print_errors(bio_err); |
| goto end; |
| } |
| BIO_printf(bio_err, "ok\n"); |
| |
| } |
| |
| if (C) { |
| size_t buf_len = 0, tmp_len = 0; |
| const EC_POINT *point; |
| int is_prime, len = 0; |
| const EC_METHOD *meth = EC_GROUP_method_of(group); |
| |
| if ((ec_p = BN_new()) == NULL |
| || (ec_a = BN_new()) == NULL |
| || (ec_b = BN_new()) == NULL |
| || (ec_gen = BN_new()) == NULL |
| || (ec_order = BN_new()) == NULL |
| || (ec_cofactor = BN_new()) == NULL) { |
| perror("Can't allocate BN"); |
| goto end; |
| } |
| |
| is_prime = (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field); |
| if (!is_prime) { |
| BIO_printf(bio_err, "Can only handle X9.62 prime fields\n"); |
| goto end; |
| } |
| |
| if (!EC_GROUP_get_curve(group, ec_p, ec_a, ec_b, NULL)) |
| goto end; |
| |
| if ((point = EC_GROUP_get0_generator(group)) == NULL) |
| goto end; |
| if (!EC_POINT_point2bn(group, point, |
| EC_GROUP_get_point_conversion_form(group), |
| ec_gen, NULL)) |
| goto end; |
| if (!EC_GROUP_get_order(group, ec_order, NULL)) |
| goto end; |
| if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL)) |
| goto end; |
| |
| if (!ec_p || !ec_a || !ec_b || !ec_gen || !ec_order || !ec_cofactor) |
| goto end; |
| |
| len = BN_num_bits(ec_order); |
| |
| if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len) |
| buf_len = tmp_len; |
| if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len) |
| buf_len = tmp_len; |
| if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len) |
| buf_len = tmp_len; |
| if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len) |
| buf_len = tmp_len; |
| if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len) |
| buf_len = tmp_len; |
| if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len) |
| buf_len = tmp_len; |
| |
| buffer = app_malloc(buf_len, "BN buffer"); |
| |
| BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n{\n", len); |
| print_bignum_var(out, ec_p, "ec_p", len, buffer); |
| print_bignum_var(out, ec_a, "ec_a", len, buffer); |
| print_bignum_var(out, ec_b, "ec_b", len, buffer); |
| print_bignum_var(out, ec_gen, "ec_gen", len, buffer); |
| print_bignum_var(out, ec_order, "ec_order", len, buffer); |
| print_bignum_var(out, ec_cofactor, "ec_cofactor", len, buffer); |
| BIO_printf(out, " int ok = 0;\n" |
| " EC_GROUP *group = NULL;\n" |
| " EC_POINT *point = NULL;\n" |
| " BIGNUM *tmp_1 = NULL;\n" |
| " BIGNUM *tmp_2 = NULL;\n" |
| " BIGNUM *tmp_3 = NULL;\n" |
| "\n"); |
| |
| BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_p_%d, sizeof(ec_p_%d), NULL)) == NULL)\n" |
| " goto err;\n", len, len); |
| BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_a_%d, sizeof(ec_a_%d), NULL)) == NULL)\n" |
| " goto err;\n", len, len); |
| BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_b_%d, sizeof(ec_b_%d), NULL)) == NULL)\n" |
| " goto err;\n", len, len); |
| BIO_printf(out, " if ((group = EC_GROUP_new_curve_GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)\n" |
| " goto err;\n" |
| "\n"); |
| BIO_printf(out, " /* build generator */\n"); |
| BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_gen_%d, sizeof(ec_gen_%d), tmp_1)) == NULL)\n" |
| " goto err;\n", len, len); |
| BIO_printf(out, " point = EC_POINT_bn2point(group, tmp_1, NULL, NULL);\n"); |
| BIO_printf(out, " if (point == NULL)\n" |
| " goto err;\n"); |
| BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_order_%d, sizeof(ec_order_%d), tmp_2)) == NULL)\n" |
| " goto err;\n", len, len); |
| BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_cofactor_%d, sizeof(ec_cofactor_%d), tmp_3)) == NULL)\n" |
| " goto err;\n", len, len); |
| BIO_printf(out, " if (!EC_GROUP_set_generator(group, point, tmp_2, tmp_3))\n" |
| " goto err;\n" |
| "ok = 1;" |
| "\n"); |
| BIO_printf(out, "err:\n" |
| " BN_free(tmp_1);\n" |
| " BN_free(tmp_2);\n" |
| " BN_free(tmp_3);\n" |
| " EC_POINT_free(point);\n" |
| " if (!ok) {\n" |
| " EC_GROUP_free(group);\n" |
| " return NULL;\n" |
| " }\n" |
| " return (group);\n" |
| "}\n"); |
| } |
| |
| if (outformat == FORMAT_ASN1 && genkey) |
| noout = 1; |
| |
| if (!noout) { |
| if (outformat == FORMAT_ASN1) |
| i = i2d_ECPKParameters_bio(out, group); |
| else |
| i = PEM_write_bio_ECPKParameters(out, group); |
| if (!i) { |
| BIO_printf(bio_err, "unable to write elliptic " |
| "curve parameters\n"); |
| ERR_print_errors(bio_err); |
| goto end; |
| } |
| } |
| |
| if (genkey) { |
| EC_KEY *eckey = EC_KEY_new(); |
| |
| if (eckey == NULL) |
| goto end; |
| |
| if (EC_KEY_set_group(eckey, group) == 0) { |
| BIO_printf(bio_err, "unable to set group when generating key\n"); |
| EC_KEY_free(eckey); |
| ERR_print_errors(bio_err); |
| goto end; |
| } |
| |
| if (new_form) |
| EC_KEY_set_conv_form(eckey, form); |
| |
| if (!EC_KEY_generate_key(eckey)) { |
| BIO_printf(bio_err, "unable to generate key\n"); |
| EC_KEY_free(eckey); |
| ERR_print_errors(bio_err); |
| goto end; |
| } |
| assert(private); |
| if (outformat == FORMAT_ASN1) |
| i = i2d_ECPrivateKey_bio(out, eckey); |
| else |
| i = PEM_write_bio_ECPrivateKey(out, eckey, NULL, |
| NULL, 0, NULL, NULL); |
| EC_KEY_free(eckey); |
| } |
| |
| ret = 0; |
| end: |
| BN_free(ec_p); |
| BN_free(ec_a); |
| BN_free(ec_b); |
| BN_free(ec_gen); |
| BN_free(ec_order); |
| BN_free(ec_cofactor); |
| OPENSSL_free(buffer); |
| EC_GROUP_free(group); |
| release_engine(e); |
| BIO_free(in); |
| BIO_free_all(out); |
| return ret; |
| } |
