| /* |
| * Copyright 1995-2018 The OpenSSL Project Authors. 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> |
| #ifdef OPENSSL_NO_DSA |
| NON_EMPTY_TRANSLATION_UNIT |
| #else |
| |
| # 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/dsa.h> |
| # include <openssl/x509.h> |
| # include <openssl/pem.h> |
| |
| static int dsa_cb(int p, int n, BN_GENCB *cb); |
| |
| 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_NOOUT, OPT_GENKEY, OPT_ENGINE, OPT_R_ENUM |
| } OPTION_CHOICE; |
| |
| const OPTIONS dsaparam_options[] = { |
| {"help", OPT_HELP, '-', "Display this summary"}, |
| {"inform", OPT_INFORM, 'F', "Input format - DER or PEM"}, |
| {"in", OPT_IN, '<', "Input file"}, |
| {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"}, |
| {"out", OPT_OUT, '>', "Output file"}, |
| {"text", OPT_TEXT, '-', "Print as text"}, |
| {"C", OPT_C, '-', "Output C code"}, |
| {"noout", OPT_NOOUT, '-', "No output"}, |
| {"genkey", OPT_GENKEY, '-', "Generate a DSA key"}, |
| OPT_R_OPTIONS, |
| # ifndef OPENSSL_NO_ENGINE |
| {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"}, |
| # endif |
| {NULL} |
| }; |
| |
| int dsaparam_main(int argc, char **argv) |
| { |
| ENGINE *e = NULL; |
| DSA *dsa = NULL; |
| BIO *in = NULL, *out = NULL; |
| BN_GENCB *cb = NULL; |
| int numbits = -1, num = 0, genkey = 0; |
| int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0, C = 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_C: |
| C = 1; |
| break; |
| case OPT_GENKEY: |
| genkey = 1; |
| break; |
| case OPT_R_CASES: |
| if (!opt_rand(o)) |
| goto end; |
| break; |
| case OPT_NOOUT: |
| noout = 1; |
| break; |
| } |
| } |
| argc = opt_num_rest(); |
| argv = opt_rest(); |
| |
| if (argc == 1) { |
| if (!opt_int(argv[0], &num) || num < 0) |
| goto end; |
| /* generate a key */ |
| numbits = num; |
| } |
| 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 (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); |
| |
| cb = BN_GENCB_new(); |
| if (cb == NULL) { |
| BIO_printf(bio_err, "Error allocating BN_GENCB object\n"); |
| goto end; |
| } |
| BN_GENCB_set(cb, dsa_cb, bio_err); |
| dsa = DSA_new(); |
| if (dsa == NULL) { |
| BIO_printf(bio_err, "Error allocating DSA object\n"); |
| goto end; |
| } |
| BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n", |
| num); |
| BIO_printf(bio_err, "This could take some time\n"); |
| if (!DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL, cb)) { |
| ERR_print_errors(bio_err); |
| BIO_printf(bio_err, "Error, DSA key generation failed\n"); |
| goto end; |
| } |
| } else if (informat == FORMAT_ASN1) { |
| dsa = d2i_DSAparams_bio(in, NULL); |
| } else { |
| dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL); |
| } |
| if (dsa == NULL) { |
| BIO_printf(bio_err, "unable to load DSA parameters\n"); |
| ERR_print_errors(bio_err); |
| goto end; |
| } |
| |
| if (text) { |
| DSAparams_print(out, dsa); |
| } |
| |
| if (C) { |
| const BIGNUM *p = NULL, *q = NULL, *g = NULL; |
| unsigned char *data; |
| int len, bits_p; |
| |
| DSA_get0_pqg(dsa, &p, &q, &g); |
| len = BN_num_bytes(p); |
| bits_p = BN_num_bits(p); |
| |
| data = app_malloc(len + 20, "BN space"); |
| |
| BIO_printf(bio_out, "static DSA *get_dsa%d(void)\n{\n", bits_p); |
| print_bignum_var(bio_out, p, "dsap", bits_p, data); |
| print_bignum_var(bio_out, q, "dsaq", bits_p, data); |
| print_bignum_var(bio_out, g, "dsag", bits_p, data); |
| BIO_printf(bio_out, " DSA *dsa = DSA_new();\n" |
| " BIGNUM *p, *q, *g;\n" |
| "\n"); |
| BIO_printf(bio_out, " if (dsa == NULL)\n" |
| " return NULL;\n"); |
| BIO_printf(bio_out, " if (!DSA_set0_pqg(dsa, p = BN_bin2bn(dsap_%d, sizeof(dsap_%d), NULL),\n", |
| bits_p, bits_p); |
| BIO_printf(bio_out, " q = BN_bin2bn(dsaq_%d, sizeof(dsaq_%d), NULL),\n", |
| bits_p, bits_p); |
| BIO_printf(bio_out, " g = BN_bin2bn(dsag_%d, sizeof(dsag_%d), NULL))) {\n", |
| bits_p, bits_p); |
| BIO_printf(bio_out, " DSA_free(dsa);\n" |
| " BN_free(p);\n" |
| " BN_free(q);\n" |
| " BN_free(g);\n" |
| " return NULL;\n" |
| " }\n" |
| " return dsa;\n}\n"); |
| OPENSSL_free(data); |
| } |
| |
| if (outformat == FORMAT_ASN1 && genkey) |
| noout = 1; |
| |
| if (!noout) { |
| if (outformat == FORMAT_ASN1) |
| i = i2d_DSAparams_bio(out, dsa); |
| else |
| i = PEM_write_bio_DSAparams(out, dsa); |
| if (!i) { |
| BIO_printf(bio_err, "unable to write DSA parameters\n"); |
| ERR_print_errors(bio_err); |
| goto end; |
| } |
| } |
| if (genkey) { |
| DSA *dsakey; |
| |
| if ((dsakey = DSAparams_dup(dsa)) == NULL) |
| goto end; |
| if (!DSA_generate_key(dsakey)) { |
| ERR_print_errors(bio_err); |
| DSA_free(dsakey); |
| goto end; |
| } |
| assert(private); |
| if (outformat == FORMAT_ASN1) |
| i = i2d_DSAPrivateKey_bio(out, dsakey); |
| else |
| i = PEM_write_bio_DSAPrivateKey(out, dsakey, NULL, NULL, 0, NULL, |
| NULL); |
| DSA_free(dsakey); |
| } |
| ret = 0; |
| end: |
| BN_GENCB_free(cb); |
| BIO_free(in); |
| BIO_free_all(out); |
| DSA_free(dsa); |
| release_engine(e); |
| return ret; |
| } |
| |
| static int dsa_cb(int p, int n, BN_GENCB *cb) |
| { |
| static const char symbols[] = ".+*\n"; |
| char c = (p >= 0 && (size_t)p < sizeof(symbols) - 1) ? symbols[p] : '?'; |
| |
| BIO_write(BN_GENCB_get_arg(cb), &c, 1); |
| (void)BIO_flush(BN_GENCB_get_arg(cb)); |
| return 1; |
| } |
| #endif |
