/* * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the Apache License 2.0 (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 #include #include #include #include #include "apps.h" #include "progs.h" #include #include #include #include #include #include static int verbose = 0; typedef enum OPTION_choice { OPT_COMMON, OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT, OPT_NOOUT, OPT_GENKEY, OPT_ENGINE, OPT_VERBOSE, OPT_QUIET, OPT_R_ENUM, OPT_PROV_ENUM } OPTION_CHOICE; const OPTIONS dsaparam_options[] = { {OPT_HELP_STR, 1, '-', "Usage: %s [options] [numbits] [numqbits]\n"}, OPT_SECTION("General"), {"help", OPT_HELP, '-', "Display this summary"}, #ifndef OPENSSL_NO_ENGINE {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"}, #endif OPT_SECTION("Input"), {"in", OPT_IN, '<', "Input file"}, {"inform", OPT_INFORM, 'F', "Input format - DER or PEM"}, OPT_SECTION("Output"), {"out", OPT_OUT, '>', "Output file"}, {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"}, {"text", OPT_TEXT, '-', "Print as text"}, {"noout", OPT_NOOUT, '-', "No output"}, {"verbose", OPT_VERBOSE, '-', "Verbose output"}, {"quiet", OPT_QUIET, '-', "Terse output"}, {"genkey", OPT_GENKEY, '-', "Generate a DSA key"}, OPT_R_OPTIONS, OPT_PROV_OPTIONS, OPT_PARAMETERS(), {"numbits", 0, 0, "Number of bits if generating parameters or key (optional)"}, {"numqbits", 0, 0, "Number of bits in the subprime parameter q if generating parameters or key (optional)"}, {NULL} }; int dsaparam_main(int argc, char **argv) { ENGINE *e = NULL; BIO *out = NULL; EVP_PKEY *params = NULL, *pkey = NULL; EVP_PKEY_CTX *ctx = NULL; int numbits = -1, numqbits = -1, num = 0, genkey = 0; int informat = FORMAT_UNDEF, outformat = FORMAT_PEM, noout = 0; int ret = 1, i, text = 0, private = 0; char *infile = NULL, *outfile = NULL, *prog; OPTION_CHOICE o; prog = opt_init(argc, argv, dsaparam_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(dsaparam_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_ENGINE: e = setup_engine(opt_arg(), 0); break; case OPT_TEXT: text = 1; break; case OPT_GENKEY: genkey = 1; break; case OPT_R_CASES: if (!opt_rand(o)) goto end; break; case OPT_PROV_CASES: if (!opt_provider(o)) goto end; break; case OPT_NOOUT: noout = 1; break; case OPT_VERBOSE: verbose = 1; break; case OPT_QUIET: verbose = 0; break; } } /* Optional args are bitsize and q bitsize. */ argc = opt_num_rest(); argv = opt_rest(); if (argc == 2) { if (!opt_int(argv[0], &num) || num < 0) goto opthelp; if (!opt_int(argv[1], &numqbits) || numqbits < 0) goto opthelp; } else if (argc == 1) { if (!opt_int(argv[0], &num) || num < 0) goto opthelp; } else if (!opt_check_rest_arg(NULL)) { goto opthelp; } if (!app_RAND_load()) goto end; /* generate a key */ numbits = num; private = genkey ? 1 : 0; ctx = EVP_PKEY_CTX_new_from_name(app_get0_libctx(), "DSA", app_get0_propq()); if (ctx == NULL) { BIO_printf(bio_err, "Error, DSA parameter generation context allocation failed\n"); goto end; } if (numbits > 0) { if (numbits > OPENSSL_DSA_MAX_MODULUS_BITS) BIO_printf(bio_err, "Warning: It is not recommended to use more than %d bit for DSA keys.\n" " Your key size is %d! Larger key size may behave not as expected.\n", OPENSSL_DSA_MAX_MODULUS_BITS, numbits); EVP_PKEY_CTX_set_app_data(ctx, bio_err); if (verbose) { EVP_PKEY_CTX_set_cb(ctx, progress_cb); BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n", num); BIO_printf(bio_err, "This could take some time\n"); } if (EVP_PKEY_paramgen_init(ctx) <= 0) { BIO_printf(bio_err, "Error, DSA key generation paramgen init failed\n"); goto end; } if (EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, num) <= 0) { BIO_printf(bio_err, "Error, DSA key generation setting bit length failed\n"); goto end; } if (numqbits > 0) { if (EVP_PKEY_CTX_set_dsa_paramgen_q_bits(ctx, numqbits) <= 0) { BIO_printf(bio_err, "Error, DSA key generation setting subprime bit length failed\n"); goto end; } } params = app_paramgen(ctx, "DSA"); } else { params = load_keyparams(infile, informat, 1, "DSA", "DSA parameters"); } if (params == NULL) { /* Error message should already have been displayed */ goto end; } out = bio_open_owner(outfile, outformat, private); if (out == NULL) goto end; if (text) { EVP_PKEY_print_params(out, params, 0, NULL); } if (outformat == FORMAT_ASN1 && genkey) noout = 1; if (!noout) { if (outformat == FORMAT_ASN1) i = i2d_KeyParams_bio(out, params); else i = PEM_write_bio_Parameters(out, params); if (!i) { BIO_printf(bio_err, "Error, unable to write DSA parameters\n"); goto end; } } if (genkey) { EVP_PKEY_CTX_free(ctx); ctx = EVP_PKEY_CTX_new_from_pkey(app_get0_libctx(), params, app_get0_propq()); if (ctx == NULL) { BIO_printf(bio_err, "Error, DSA key generation context allocation failed\n"); goto end; } if (EVP_PKEY_keygen_init(ctx) <= 0) { BIO_printf(bio_err, "Error, unable to initialise for key generation\n"); goto end; } pkey = app_keygen(ctx, "DSA", numbits, verbose); if (pkey == NULL) goto end; assert(private); if (outformat == FORMAT_ASN1) i = i2d_PrivateKey_bio(out, pkey); else i = PEM_write_bio_PrivateKey(out, pkey, NULL, NULL, 0, NULL, NULL); } ret = 0; end: if (ret != 0) ERR_print_errors(bio_err); BIO_free_all(out); EVP_PKEY_CTX_free(ctx); EVP_PKEY_free(pkey); EVP_PKEY_free(params); release_engine(e); return ret; }