diff options
Diffstat (limited to 'openssl-1.1.0h/apps/dhparam.c')
| -rw-r--r-- | openssl-1.1.0h/apps/dhparam.c | 392 |
1 files changed, 392 insertions, 0 deletions
diff --git a/openssl-1.1.0h/apps/dhparam.c b/openssl-1.1.0h/apps/dhparam.c new file mode 100644 index 0000000..94322e3 --- /dev/null +++ b/openssl-1.1.0h/apps/dhparam.c @@ -0,0 +1,392 @@ +/* + * 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; + +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) { + /* + * We have no PEM header to determine what type of DH params it + * is. We'll just try both. + */ + dh = d2i_DHparams_bio(in, NULL); + /* BIO_reset() returns 0 for success for file BIOs only!!! */ + if (dh == NULL && BIO_reset(in) == 0) + dh = d2i_DHxparams_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) { + if (q != NULL) + i = i2d_DHxparams_bio(out, dh); + else + 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 |