| 1 | /*
|
|---|
| 2 | * Copyright 1995-2023 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 <time.h>
|
|---|
| 15 | #include <string.h>
|
|---|
| 16 | #include "apps.h"
|
|---|
| 17 | #include "progs.h"
|
|---|
| 18 | #include <openssl/bio.h>
|
|---|
| 19 | #include <openssl/err.h>
|
|---|
| 20 | #include <openssl/bn.h>
|
|---|
| 21 | #include <openssl/dsa.h>
|
|---|
| 22 | #include <openssl/x509.h>
|
|---|
| 23 | #include <openssl/pem.h>
|
|---|
| 24 |
|
|---|
| 25 | static int verbose = 0;
|
|---|
| 26 |
|
|---|
| 27 | typedef enum OPTION_choice {
|
|---|
| 28 | OPT_COMMON,
|
|---|
| 29 | OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT,
|
|---|
| 30 | OPT_NOOUT, OPT_GENKEY, OPT_ENGINE, OPT_VERBOSE, OPT_QUIET,
|
|---|
| 31 | OPT_R_ENUM, OPT_PROV_ENUM
|
|---|
| 32 | } OPTION_CHOICE;
|
|---|
| 33 |
|
|---|
| 34 | const OPTIONS dsaparam_options[] = {
|
|---|
| 35 | {OPT_HELP_STR, 1, '-', "Usage: %s [options] [numbits] [numqbits]\n"},
|
|---|
| 36 |
|
|---|
| 37 | OPT_SECTION("General"),
|
|---|
| 38 | {"help", OPT_HELP, '-', "Display this summary"},
|
|---|
| 39 | #ifndef OPENSSL_NO_ENGINE
|
|---|
| 40 | {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
|
|---|
| 41 | #endif
|
|---|
| 42 |
|
|---|
| 43 | OPT_SECTION("Input"),
|
|---|
| 44 | {"in", OPT_IN, '<', "Input file"},
|
|---|
| 45 | {"inform", OPT_INFORM, 'F', "Input format - DER or PEM"},
|
|---|
| 46 |
|
|---|
| 47 | OPT_SECTION("Output"),
|
|---|
| 48 | {"out", OPT_OUT, '>', "Output file"},
|
|---|
| 49 | {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
|
|---|
| 50 | {"text", OPT_TEXT, '-', "Print as text"},
|
|---|
| 51 | {"noout", OPT_NOOUT, '-', "No output"},
|
|---|
| 52 | {"verbose", OPT_VERBOSE, '-', "Verbose output"},
|
|---|
| 53 | {"quiet", OPT_QUIET, '-', "Terse output"},
|
|---|
| 54 | {"genkey", OPT_GENKEY, '-', "Generate a DSA key"},
|
|---|
| 55 |
|
|---|
| 56 | OPT_R_OPTIONS,
|
|---|
| 57 | OPT_PROV_OPTIONS,
|
|---|
| 58 |
|
|---|
| 59 | OPT_PARAMETERS(),
|
|---|
| 60 | {"numbits", 0, 0, "Number of bits if generating parameters or key (optional)"},
|
|---|
| 61 | {"numqbits", 0, 0, "Number of bits in the subprime parameter q if generating parameters or key (optional)"},
|
|---|
| 62 | {NULL}
|
|---|
| 63 | };
|
|---|
| 64 |
|
|---|
| 65 | int dsaparam_main(int argc, char **argv)
|
|---|
| 66 | {
|
|---|
| 67 | ENGINE *e = NULL;
|
|---|
| 68 | BIO *out = NULL;
|
|---|
| 69 | EVP_PKEY *params = NULL, *pkey = NULL;
|
|---|
| 70 | EVP_PKEY_CTX *ctx = NULL;
|
|---|
| 71 | int numbits = -1, numqbits = -1, num = 0, genkey = 0;
|
|---|
| 72 | int informat = FORMAT_UNDEF, outformat = FORMAT_PEM, noout = 0;
|
|---|
| 73 | int ret = 1, i, text = 0, private = 0;
|
|---|
| 74 | char *infile = NULL, *outfile = NULL, *prog;
|
|---|
| 75 | OPTION_CHOICE o;
|
|---|
| 76 |
|
|---|
| 77 | prog = opt_init(argc, argv, dsaparam_options);
|
|---|
| 78 | while ((o = opt_next()) != OPT_EOF) {
|
|---|
| 79 | switch (o) {
|
|---|
| 80 | case OPT_EOF:
|
|---|
| 81 | case OPT_ERR:
|
|---|
| 82 | opthelp:
|
|---|
| 83 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
|
|---|
| 84 | goto end;
|
|---|
| 85 | case OPT_HELP:
|
|---|
| 86 | opt_help(dsaparam_options);
|
|---|
| 87 | ret = 0;
|
|---|
| 88 | goto end;
|
|---|
| 89 | case OPT_INFORM:
|
|---|
| 90 | if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
|
|---|
| 91 | goto opthelp;
|
|---|
| 92 | break;
|
|---|
| 93 | case OPT_IN:
|
|---|
| 94 | infile = opt_arg();
|
|---|
| 95 | break;
|
|---|
| 96 | case OPT_OUTFORM:
|
|---|
| 97 | if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
|
|---|
| 98 | goto opthelp;
|
|---|
| 99 | break;
|
|---|
| 100 | case OPT_OUT:
|
|---|
| 101 | outfile = opt_arg();
|
|---|
| 102 | break;
|
|---|
| 103 | case OPT_ENGINE:
|
|---|
| 104 | e = setup_engine(opt_arg(), 0);
|
|---|
| 105 | break;
|
|---|
| 106 | case OPT_TEXT:
|
|---|
| 107 | text = 1;
|
|---|
| 108 | break;
|
|---|
| 109 | case OPT_GENKEY:
|
|---|
| 110 | genkey = 1;
|
|---|
| 111 | break;
|
|---|
| 112 | case OPT_R_CASES:
|
|---|
| 113 | if (!opt_rand(o))
|
|---|
| 114 | goto end;
|
|---|
| 115 | break;
|
|---|
| 116 | case OPT_PROV_CASES:
|
|---|
| 117 | if (!opt_provider(o))
|
|---|
| 118 | goto end;
|
|---|
| 119 | break;
|
|---|
| 120 | case OPT_NOOUT:
|
|---|
| 121 | noout = 1;
|
|---|
| 122 | break;
|
|---|
| 123 | case OPT_VERBOSE:
|
|---|
| 124 | verbose = 1;
|
|---|
| 125 | break;
|
|---|
| 126 | case OPT_QUIET:
|
|---|
| 127 | verbose = 0;
|
|---|
| 128 | break;
|
|---|
| 129 | }
|
|---|
| 130 | }
|
|---|
| 131 |
|
|---|
| 132 | /* Optional args are bitsize and q bitsize. */
|
|---|
| 133 | argc = opt_num_rest();
|
|---|
| 134 | argv = opt_rest();
|
|---|
| 135 | if (argc == 2) {
|
|---|
| 136 | if (!opt_int(argv[0], &num) || num < 0)
|
|---|
| 137 | goto opthelp;
|
|---|
| 138 | if (!opt_int(argv[1], &numqbits) || numqbits < 0)
|
|---|
| 139 | goto opthelp;
|
|---|
| 140 | } else if (argc == 1) {
|
|---|
| 141 | if (!opt_int(argv[0], &num) || num < 0)
|
|---|
| 142 | goto opthelp;
|
|---|
| 143 | } else if (!opt_check_rest_arg(NULL)) {
|
|---|
| 144 | goto opthelp;
|
|---|
| 145 | }
|
|---|
| 146 | if (!app_RAND_load())
|
|---|
| 147 | goto end;
|
|---|
| 148 |
|
|---|
| 149 | /* generate a key */
|
|---|
| 150 | numbits = num;
|
|---|
| 151 | private = genkey ? 1 : 0;
|
|---|
| 152 |
|
|---|
| 153 | out = bio_open_owner(outfile, outformat, private);
|
|---|
| 154 | if (out == NULL)
|
|---|
| 155 | goto end;
|
|---|
| 156 |
|
|---|
| 157 | ctx = EVP_PKEY_CTX_new_from_name(app_get0_libctx(), "DSA", app_get0_propq());
|
|---|
| 158 | if (ctx == NULL) {
|
|---|
| 159 | BIO_printf(bio_err,
|
|---|
| 160 | "Error, DSA parameter generation context allocation failed\n");
|
|---|
| 161 | goto end;
|
|---|
| 162 | }
|
|---|
| 163 | if (numbits > 0) {
|
|---|
| 164 | if (numbits > OPENSSL_DSA_MAX_MODULUS_BITS)
|
|---|
| 165 | BIO_printf(bio_err,
|
|---|
| 166 | "Warning: It is not recommended to use more than %d bit for DSA keys.\n"
|
|---|
| 167 | " Your key size is %d! Larger key size may behave not as expected.\n",
|
|---|
| 168 | OPENSSL_DSA_MAX_MODULUS_BITS, numbits);
|
|---|
| 169 |
|
|---|
| 170 | EVP_PKEY_CTX_set_app_data(ctx, bio_err);
|
|---|
| 171 | if (verbose) {
|
|---|
| 172 | EVP_PKEY_CTX_set_cb(ctx, progress_cb);
|
|---|
| 173 | BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n",
|
|---|
| 174 | num);
|
|---|
| 175 | BIO_printf(bio_err, "This could take some time\n");
|
|---|
| 176 | }
|
|---|
| 177 | if (EVP_PKEY_paramgen_init(ctx) <= 0) {
|
|---|
| 178 | BIO_printf(bio_err,
|
|---|
| 179 | "Error, DSA key generation paramgen init failed\n");
|
|---|
| 180 | goto end;
|
|---|
| 181 | }
|
|---|
| 182 | if (EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, num) <= 0) {
|
|---|
| 183 | BIO_printf(bio_err,
|
|---|
| 184 | "Error, DSA key generation setting bit length failed\n");
|
|---|
| 185 | goto end;
|
|---|
| 186 | }
|
|---|
| 187 | if (numqbits > 0) {
|
|---|
| 188 | if (EVP_PKEY_CTX_set_dsa_paramgen_q_bits(ctx, numqbits) <= 0) {
|
|---|
| 189 | BIO_printf(bio_err,
|
|---|
| 190 | "Error, DSA key generation setting subprime bit length failed\n");
|
|---|
| 191 | goto end;
|
|---|
| 192 | }
|
|---|
| 193 | }
|
|---|
| 194 | params = app_paramgen(ctx, "DSA");
|
|---|
| 195 | } else {
|
|---|
| 196 | params = load_keyparams(infile, informat, 1, "DSA", "DSA parameters");
|
|---|
| 197 | }
|
|---|
| 198 | if (params == NULL) {
|
|---|
| 199 | /* Error message should already have been displayed */
|
|---|
| 200 | goto end;
|
|---|
| 201 | }
|
|---|
| 202 |
|
|---|
| 203 | if (text) {
|
|---|
| 204 | EVP_PKEY_print_params(out, params, 0, NULL);
|
|---|
| 205 | }
|
|---|
| 206 |
|
|---|
| 207 | if (outformat == FORMAT_ASN1 && genkey)
|
|---|
| 208 | noout = 1;
|
|---|
| 209 |
|
|---|
| 210 | if (!noout) {
|
|---|
| 211 | if (outformat == FORMAT_ASN1)
|
|---|
| 212 | i = i2d_KeyParams_bio(out, params);
|
|---|
| 213 | else
|
|---|
| 214 | i = PEM_write_bio_Parameters(out, params);
|
|---|
| 215 | if (!i) {
|
|---|
| 216 | BIO_printf(bio_err, "Error, unable to write DSA parameters\n");
|
|---|
| 217 | goto end;
|
|---|
| 218 | }
|
|---|
| 219 | }
|
|---|
| 220 | if (genkey) {
|
|---|
| 221 | EVP_PKEY_CTX_free(ctx);
|
|---|
| 222 | ctx = EVP_PKEY_CTX_new_from_pkey(app_get0_libctx(), params,
|
|---|
| 223 | app_get0_propq());
|
|---|
| 224 | if (ctx == NULL) {
|
|---|
| 225 | BIO_printf(bio_err,
|
|---|
| 226 | "Error, DSA key generation context allocation failed\n");
|
|---|
| 227 | goto end;
|
|---|
| 228 | }
|
|---|
| 229 | if (EVP_PKEY_keygen_init(ctx) <= 0) {
|
|---|
| 230 | BIO_printf(bio_err,
|
|---|
| 231 | "Error, unable to initialise for key generation\n");
|
|---|
| 232 | goto end;
|
|---|
| 233 | }
|
|---|
| 234 | pkey = app_keygen(ctx, "DSA", numbits, verbose);
|
|---|
| 235 | if (pkey == NULL)
|
|---|
| 236 | goto end;
|
|---|
| 237 | assert(private);
|
|---|
| 238 | if (outformat == FORMAT_ASN1)
|
|---|
| 239 | i = i2d_PrivateKey_bio(out, pkey);
|
|---|
| 240 | else
|
|---|
| 241 | i = PEM_write_bio_PrivateKey(out, pkey, NULL, NULL, 0, NULL, NULL);
|
|---|
| 242 | }
|
|---|
| 243 | ret = 0;
|
|---|
| 244 | end:
|
|---|
| 245 | if (ret != 0)
|
|---|
| 246 | ERR_print_errors(bio_err);
|
|---|
| 247 | BIO_free_all(out);
|
|---|
| 248 | EVP_PKEY_CTX_free(ctx);
|
|---|
| 249 | EVP_PKEY_free(pkey);
|
|---|
| 250 | EVP_PKEY_free(params);
|
|---|
| 251 | release_engine(e);
|
|---|
| 252 | return ret;
|
|---|
| 253 | }
|
|---|
