| /* | |
| * Copyright 1995-2016 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_DH | |
| NON_EMPTY_TRANSLATION_UNIT | |
| #else | |
| # include <stdio.h> | |
| # include <stdlib.h> | |
| # include <time.h> | |
| # include <string.h> | |
| # include "apps.h" | |
| # include <openssl/bio.h> | |
| # include <openssl/err.h> | |
| # include <openssl/bn.h> | |
| # include <openssl/dh.h> | |
| # include <openssl/x509.h> | |
| # include <openssl/pem.h> | |
| # ifndef OPENSSL_NO_DSA | |
| # include <openssl/dsa.h> | |
| # endif | |
| # define DEFBITS 2048 | |
| static int dh_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_ENGINE, OPT_CHECK, OPT_TEXT, OPT_NOOUT, | |
| OPT_RAND, OPT_DSAPARAM, OPT_C, OPT_2, OPT_5 | |
| } OPTION_CHOICE; | |
| const OPTIONS dhparam_options[] = { | |
| {OPT_HELP_STR, 1, '-', "Usage: %s [flags] [numbits]\n"}, | |
| {OPT_HELP_STR, 1, '-', "Valid options are:\n"}, | |
| {"help", OPT_HELP, '-', "Display this summary"}, | |
| {"in", OPT_IN, '<', "Input file"}, | |
| {"inform", OPT_INFORM, 'F', "Input format, DER or PEM"}, | |
| {"outform", OPT_OUTFORM, 'F', "Output format, DER or PEM"}, | |
| {"out", OPT_OUT, '>', "Output file"}, | |
| {"check", OPT_CHECK, '-', "Check the DH parameters"}, | |
| {"text", OPT_TEXT, '-', "Print a text form of the DH parameters"}, | |
| {"noout", OPT_NOOUT, '-', "Don't output any DH parameters"}, | |
| {"rand", OPT_RAND, 's', | |
| "Load the file(s) into the random number generator"}, | |
| {"C", OPT_C, '-', "Print C code"}, | |
| {"2", OPT_2, '-', "Generate parameters using 2 as the generator value"}, | |
| {"5", OPT_5, '-', "Generate parameters using 5 as the generator value"}, | |
| # ifndef OPENSSL_NO_DSA | |
| {"dsaparam", OPT_DSAPARAM, '-', | |
| "Read or generate DSA parameters, convert to DH"}, | |
| # endif | |
| # ifndef OPENSSL_NO_ENGINE | |
| {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"}, | |
| # endif | |
| {NULL} | |
| }; | |
| int dhparam_main(int argc, char **argv) | |
| { | |
| BIO *in = NULL, *out = NULL; | |
| DH *dh = NULL; | |
| char *infile = NULL, *outfile = NULL, *prog, *inrand = NULL; | |
| ENGINE *e = NULL; | |
| #ifndef OPENSSL_NO_DSA | |
| int dsaparam = 0; | |
| #endif | |
| int i, text = 0, C = 0, ret = 1, num = 0, g = 0; | |
| int informat = FORMAT_PEM, outformat = FORMAT_PEM, check = 0, noout = 0; | |
| OPTION_CHOICE o; | |
| prog = opt_init(argc, argv, dhparam_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(dhparam_options); | |
| ret = 0; | |
| goto end; | |
| case OPT_INFORM: | |
| if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat)) | |
| goto opthelp; | |
| break; | |
| case OPT_OUTFORM: | |
| if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat)) | |
| goto opthelp; | |
| break; | |
| case OPT_IN: | |
| infile = opt_arg(); | |
| break; | |
| case OPT_OUT: | |
| outfile = opt_arg(); | |
| break; | |
| case OPT_ENGINE: | |
| e = setup_engine(opt_arg(), 0); | |
| break; | |
| case OPT_CHECK: | |
| check = 1; | |
| break; | |
| case OPT_TEXT: | |
| text = 1; | |
| break; | |
| case OPT_DSAPARAM: | |
| #ifndef OPENSSL_NO_DSA | |
| dsaparam = 1; | |
| #endif | |
| break; | |
| case OPT_C: | |
| C = 1; | |
| break; | |
| case OPT_2: | |
| g = 2; | |
| break; | |
| case OPT_5: | |
| g = 5; | |
| break; | |
| case OPT_NOOUT: | |
| noout = 1; | |
| break; | |
| case OPT_RAND: | |
| inrand = opt_arg(); | |
| break; | |
| } | |
| } | |
| argc = opt_num_rest(); | |
| argv = opt_rest(); | |
| if (argv[0] && (!opt_int(argv[0], &num) || num <= 0)) | |
| goto end; | |
| if (g && !num) | |
| num = DEFBITS; | |
| # ifndef OPENSSL_NO_DSA | |
| if (dsaparam && g) { | |
| BIO_printf(bio_err, | |
| "generator may not be chosen for DSA parameters\n"); | |
| goto end; | |
| } | |
| # endif | |
| /* DH parameters */ | |
| if (num && !g) | |
| g = 2; | |
| if (num) { | |
| BN_GENCB *cb; | |
| cb = BN_GENCB_new(); | |
| if (cb == NULL) { | |
| ERR_print_errors(bio_err); | |
| goto end; | |
| } | |
| BN_GENCB_set(cb, dh_cb, bio_err); | |
| if (!app_RAND_load_file(NULL, 1) && inrand == NULL) { | |
| BIO_printf(bio_err, | |
| "warning, not much extra random data, consider using the -rand option\n"); | |
| } | |
| if (inrand != NULL) | |
| BIO_printf(bio_err, "%ld semi-random bytes loaded\n", | |
| app_RAND_load_files(inrand)); | |
| # ifndef OPENSSL_NO_DSA | |
| if (dsaparam) { | |
| DSA *dsa = DSA_new(); | |
| BIO_printf(bio_err, | |
| "Generating DSA parameters, %d bit long prime\n", num); | |
| if (dsa == NULL | |
| || !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL, | |
| cb)) { | |
| DSA_free(dsa); | |
| BN_GENCB_free(cb); | |
| ERR_print_errors(bio_err); | |
| goto end; | |
| } | |
| dh = DSA_dup_DH(dsa); | |
| DSA_free(dsa); | |
| if (dh == NULL) { | |
| BN_GENCB_free(cb); | |
| ERR_print_errors(bio_err); | |
| goto end; | |
| } | |
| } else | |
| # endif | |
| { | |
| dh = DH_new(); | |
| BIO_printf(bio_err, | |
| "Generating DH parameters, %d bit long safe prime, generator %d\n", | |
| num, g); | |
| BIO_printf(bio_err, "This is going to take a long time\n"); | |
| if (dh == NULL || !DH_generate_parameters_ex(dh, num, g, cb)) { | |
| BN_GENCB_free(cb); | |
| ERR_print_errors(bio_err); | |
| goto end; | |
| } | |
| } | |
| BN_GENCB_free(cb); | |
| app_RAND_write_file(NULL); | |
| } else { | |
| in = bio_open_default(infile, 'r', informat); | |
| if (in == NULL) | |
| goto end; | |
| # ifndef OPENSSL_NO_DSA | |
| if (dsaparam) { | |
| DSA *dsa; | |
| if (informat == FORMAT_ASN1) | |
| dsa = d2i_DSAparams_bio(in, NULL); | |
| else /* informat == FORMAT_PEM */ | |
| 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; | |
| } | |
| dh = DSA_dup_DH(dsa); | |
| DSA_free(dsa); | |
| if (dh == NULL) { | |
| ERR_print_errors(bio_err); | |
| goto end; | |
| } | |
| } else | |
| # endif | |
| { | |
| if (informat == FORMAT_ASN1) | |
| dh = d2i_DHparams_bio(in, NULL); | |
| else /* informat == FORMAT_PEM */ | |
| dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL); | |
| if (dh == NULL) { | |
| BIO_printf(bio_err, "unable to load DH parameters\n"); | |
| ERR_print_errors(bio_err); | |
| goto end; | |
| } | |
| } | |
| /* dh != NULL */ | |
| } | |
| out = bio_open_default(outfile, 'w', outformat); | |
| if (out == NULL) | |
| goto end; | |
| if (text) { | |
| DHparams_print(out, dh); | |
| } | |
| if (check) { | |
| if (!DH_check(dh, &i)) { | |
| ERR_print_errors(bio_err); | |
| goto end; | |
| } | |
| if (i & DH_CHECK_P_NOT_PRIME) | |
| BIO_printf(bio_err, "WARNING: p value is not prime\n"); | |
| if (i & DH_CHECK_P_NOT_SAFE_PRIME) | |
| BIO_printf(bio_err, "WARNING: p value is not a safe prime\n"); | |
| if (i & DH_CHECK_Q_NOT_PRIME) | |
| BIO_printf(bio_err, "WARNING: q value is not a prime\n"); | |
| if (i & DH_CHECK_INVALID_Q_VALUE) | |
| BIO_printf(bio_err, "WARNING: q value is invalid\n"); | |
| if (i & DH_CHECK_INVALID_J_VALUE) | |
| BIO_printf(bio_err, "WARNING: j value is invalid\n"); | |
| if (i & DH_UNABLE_TO_CHECK_GENERATOR) | |
| BIO_printf(bio_err, | |
| "WARNING: unable to check the generator value\n"); | |
| if (i & DH_NOT_SUITABLE_GENERATOR) | |
| BIO_printf(bio_err, "WARNING: the g value is not a generator\n"); | |
| if (i == 0) | |
| BIO_printf(bio_err, "DH parameters appear to be ok.\n"); | |
| if (num != 0 && i != 0) { | |
| /* | |
| * We have generated parameters but DH_check() indicates they are | |
| * invalid! This should never happen! | |
| */ | |
| BIO_printf(bio_err, "ERROR: Invalid parameters generated\n"); | |
| goto end; | |
| } | |
| } | |
| if (C) { | |
| unsigned char *data; | |
| int len, bits; | |
| const BIGNUM *pbn, *gbn; | |
| len = DH_size(dh); | |
| bits = DH_bits(dh); | |
| DH_get0_pqg(dh, &pbn, NULL, &gbn); | |
| data = app_malloc(len, "print a BN"); | |
| BIO_printf(out, "#ifndef HEADER_DH_H\n" | |
| "# include <openssl/dh.h>\n" | |
| "#endif\n" | |
| "\n"); | |
| BIO_printf(out, "DH *get_dh%d()\n{\n", bits); | |
| print_bignum_var(out, pbn, "dhp", bits, data); | |
| print_bignum_var(out, gbn, "dhg", bits, data); | |
| BIO_printf(out, " DH *dh = DH_new();\n" | |
| " BIGNUM *dhp_bn, *dhg_bn;\n" | |
| "\n" | |
| " if (dh == NULL)\n" | |
| " return NULL;\n"); | |
| BIO_printf(out, " dhp_bn = BN_bin2bn(dhp_%d, sizeof (dhp_%d), NULL);\n", | |
| bits, bits); | |
| BIO_printf(out, " dhg_bn = BN_bin2bn(dhg_%d, sizeof (dhg_%d), NULL);\n", | |
| bits, bits); | |
| BIO_printf(out, " if (dhp_bn == NULL || dhg_bn == NULL\n" | |
| " || !DH_set0_pqg(dh, dhp_bn, NULL, dhg_bn)) {\n" | |
| " DH_free(dh);\n" | |
| " BN_free(dhp_bn);\n" | |
| " BN_free(dhg_bn);\n" | |
| " return NULL;\n" | |
| " }\n"); | |
| if (DH_get_length(dh) > 0) | |
| BIO_printf(out, | |
| " if (!DH_set_length(dh, %ld)) {\n" | |
| " DH_free(dh);\n" | |
| " }\n", DH_get_length(dh)); | |
| BIO_printf(out, " return dh;\n}\n"); | |
| OPENSSL_free(data); | |
| } | |
| if (!noout) { | |
| const BIGNUM *q; | |
| DH_get0_pqg(dh, NULL, &q, NULL); | |
| if (outformat == FORMAT_ASN1) | |
| i = i2d_DHparams_bio(out, dh); | |
| else if (q != NULL) | |
| i = PEM_write_bio_DHxparams(out, dh); | |
| else | |
| i = PEM_write_bio_DHparams(out, dh); | |
| if (!i) { | |
| BIO_printf(bio_err, "unable to write DH parameters\n"); | |
| ERR_print_errors(bio_err); | |
| goto end; | |
| } | |
| } | |
| ret = 0; | |
| end: | |
| BIO_free(in); | |
| BIO_free_all(out); | |
| DH_free(dh); | |
| release_engine(e); | |
| return (ret); | |
| } | |
| static int dh_cb(int p, int n, BN_GENCB *cb) | |
| { | |
| char c = '*'; | |
| if (p == 0) | |
| c = '.'; | |
| if (p == 1) | |
| c = '+'; | |
| if (p == 2) | |
| c = '*'; | |
| if (p == 3) | |
| c = '\n'; | |
| BIO_write(BN_GENCB_get_arg(cb), &c, 1); | |
| (void)BIO_flush(BN_GENCB_get_arg(cb)); | |
| return 1; | |
| } | |
| #endif |