diff options
Diffstat (limited to 'openssl-1.1.0h/apps/dsaparam.c')
| -rw-r--r-- | openssl-1.1.0h/apps/dsaparam.c | 316 |
1 files changed, 316 insertions, 0 deletions
diff --git a/openssl-1.1.0h/apps/dsaparam.c b/openssl-1.1.0h/apps/dsaparam.c new file mode 100644 index 0000000..5c3c8f8 --- /dev/null +++ b/openssl-1.1.0h/apps/dsaparam.c @@ -0,0 +1,316 @@ +/* + * 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 <openssl/bio.h> +# include <openssl/err.h> +# include <openssl/bn.h> +# include <openssl/dsa.h> +# include <openssl/x509.h> +# include <openssl/pem.h> + +# ifdef GENCB_TEST + +static int stop_keygen_flag = 0; + +static void timebomb_sigalarm(int foo) +{ + stop_keygen_flag = 1; +} + +# endif + +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_RAND, OPT_ENGINE, + OPT_TIMEBOMB +} OPTION_CHOICE; + +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"}, + {"rand", OPT_RAND, 's', "Files to use for random number input"}, +# ifdef GENCB_TEST + {"timebomb", OPT_TIMEBOMB, 'p', "Interrupt keygen after 'pnum' seconds"}, +# endif +# 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, need_rand = 0; + int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0, C = 0; + int ret = 1, i, text = 0, private = 0; +# ifdef GENCB_TEST + int timebomb = 0; +# endif + char *infile = NULL, *outfile = NULL, *prog, *inrand = NULL; + 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_TIMEBOMB: +# ifdef GENCB_TEST + timebomb = atoi(opt_arg()); + break; +# endif + case OPT_TEXT: + text = 1; + break; + case OPT_C: + C = 1; + break; + case OPT_GENKEY: + genkey = need_rand = 1; + break; + case OPT_RAND: + inrand = opt_arg(); + need_rand = 1; + 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; + need_rand = 1; + } + 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 (need_rand) { + app_RAND_load_file(NULL, (inrand != NULL)); + if (inrand != NULL) + BIO_printf(bio_err, "%ld semi-random bytes loaded\n", + app_RAND_load_files(inrand)); + } + + if (numbits > 0) { + 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); + assert(need_rand); + 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"); +# ifdef GENCB_TEST + if (timebomb > 0) { + struct sigaction act; + act.sa_handler = timebomb_sigalarm; + act.sa_flags = 0; + BIO_printf(bio_err, + "(though I'll stop it if not done within %d secs)\n", + timebomb); + if (sigaction(SIGALRM, &act, NULL) != 0) { + BIO_printf(bio_err, "Error, couldn't set SIGALRM handler\n"); + goto end; + } + alarm(timebomb); + } +# endif + if (!DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL, cb)) { +# ifdef GENCB_TEST + if (stop_keygen_flag) { + BIO_printf(bio_err, "DSA key generation time-stopped\n"); + /* This is an asked-for behaviour! */ + ret = 0; + goto end; + } +# endif + 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, "DSA *get_dsa%d()\n{\n", bits_p); + print_bignum_var(bio_out, p, "dsap", len, data); + print_bignum_var(bio_out, q, "dsaq", len, data); + print_bignum_var(bio_out, g, "dsag", len, data); + BIO_printf(bio_out, " DSA *dsa = DSA_new();\n" + "\n"); + BIO_printf(bio_out, " if (dsa == NULL)\n" + " return NULL;\n"); + BIO_printf(bio_out, " dsa->p = BN_bin2bn(dsap_%d, sizeof(dsap_%d), NULL);\n", + bits_p, bits_p); + BIO_printf(bio_out, " dsa->q = BN_bin2bn(dsaq_%d, sizeof(dsaq_%d), NULL);\n", + bits_p, bits_p); + BIO_printf(bio_out, " dsa->g = BN_bin2bn(dsag_%d, sizeof(dsag_%d), NULL);\n", + bits_p, bits_p); + BIO_printf(bio_out, " if (!dsa->p || !dsa->q || !dsa->g) {\n" + " DSA_free(dsa);\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; + + assert(need_rand); + 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); + } + if (need_rand) + app_RAND_write_file(NULL); + 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) +{ + 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)); +# ifdef GENCB_TEST + if (stop_keygen_flag) + return 0; +# endif + return 1; +} +#endif |