[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <openssl/opensslconf.h>
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| 11 | #ifdef OPENSSL_NO_RSA
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| 12 | NON_EMPTY_TRANSLATION_UNIT
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| 13 | #else
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| 14 |
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| 15 | # include <stdio.h>
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| 16 | # include <string.h>
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| 17 | # include <sys/types.h>
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| 18 | # include <sys/stat.h>
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| 19 | # include "apps.h"
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| 20 | # include <openssl/bio.h>
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| 21 | # include <openssl/err.h>
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| 22 | # include <openssl/bn.h>
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| 23 | # include <openssl/rsa.h>
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| 24 | # include <openssl/evp.h>
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| 25 | # include <openssl/x509.h>
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| 26 | # include <openssl/pem.h>
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| 27 | # include <openssl/rand.h>
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| 28 |
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| 29 | # define DEFBITS 2048
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| 30 |
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| 31 | static int genrsa_cb(int p, int n, BN_GENCB *cb);
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| 32 |
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| 33 | typedef enum OPTION_choice {
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| 34 | OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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| 35 | OPT_3, OPT_F4, OPT_ENGINE,
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| 36 | OPT_OUT, OPT_RAND, OPT_PASSOUT, OPT_CIPHER
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| 37 | } OPTION_CHOICE;
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| 38 |
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| 39 | OPTIONS genrsa_options[] = {
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| 40 | {"help", OPT_HELP, '-', "Display this summary"},
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| 41 | {"3", OPT_3, '-', "Use 3 for the E value"},
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| 42 | {"F4", OPT_F4, '-', "Use F4 (0x10001) for the E value"},
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| 43 | {"f4", OPT_F4, '-', "Use F4 (0x10001) for the E value"},
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| 44 | {"out", OPT_OUT, 's', "Output the key to specified file"},
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| 45 | {"rand", OPT_RAND, 's',
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| 46 | "Load the file(s) into the random number generator"},
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| 47 | {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
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| 48 | {"", OPT_CIPHER, '-', "Encrypt the output with any supported cipher"},
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| 49 | # ifndef OPENSSL_NO_ENGINE
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| 50 | {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
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| 51 | # endif
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| 52 | {NULL}
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| 53 | };
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| 54 |
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| 55 | int genrsa_main(int argc, char **argv)
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| 56 | {
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| 57 | BN_GENCB *cb = BN_GENCB_new();
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| 58 | PW_CB_DATA cb_data;
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| 59 | ENGINE *eng = NULL;
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| 60 | BIGNUM *bn = BN_new();
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| 61 | BIO *out = NULL;
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| 62 | const BIGNUM *e;
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| 63 | RSA *rsa = NULL;
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| 64 | const EVP_CIPHER *enc = NULL;
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| 65 | int ret = 1, num = DEFBITS, private = 0;
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| 66 | unsigned long f4 = RSA_F4;
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| 67 | char *outfile = NULL, *passoutarg = NULL, *passout = NULL;
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| 68 | char *inrand = NULL, *prog, *hexe, *dece;
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| 69 | OPTION_CHOICE o;
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| 70 |
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| 71 | if (bn == NULL || cb == NULL)
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| 72 | goto end;
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| 73 |
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| 74 | BN_GENCB_set(cb, genrsa_cb, bio_err);
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| 75 |
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| 76 | prog = opt_init(argc, argv, genrsa_options);
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| 77 | while ((o = opt_next()) != OPT_EOF) {
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| 78 | switch (o) {
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| 79 | case OPT_EOF:
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| 80 | case OPT_ERR:
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| 81 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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| 82 | goto end;
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| 83 | case OPT_HELP:
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| 84 | ret = 0;
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| 85 | opt_help(genrsa_options);
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| 86 | goto end;
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| 87 | case OPT_3:
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| 88 | f4 = 3;
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| 89 | break;
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| 90 | case OPT_F4:
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| 91 | f4 = RSA_F4;
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| 92 | break;
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| 93 | case OPT_OUT:
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| 94 | outfile = opt_arg();
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| 95 | break;
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| 96 | case OPT_ENGINE:
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| 97 | eng = setup_engine(opt_arg(), 0);
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| 98 | break;
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| 99 | case OPT_RAND:
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| 100 | inrand = opt_arg();
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| 101 | break;
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| 102 | case OPT_PASSOUT:
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| 103 | passoutarg = opt_arg();
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| 104 | break;
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| 105 | case OPT_CIPHER:
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| 106 | if (!opt_cipher(opt_unknown(), &enc))
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| 107 | goto end;
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| 108 | break;
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| 109 | }
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| 110 | }
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| 111 | argc = opt_num_rest();
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| 112 | argv = opt_rest();
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| 113 | private = 1;
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| 114 |
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| 115 | if (argv[0] && (!opt_int(argv[0], &num) || num <= 0))
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| 116 | goto end;
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| 117 |
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| 118 | if (!app_passwd(NULL, passoutarg, NULL, &passout)) {
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| 119 | BIO_printf(bio_err, "Error getting password\n");
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| 120 | goto end;
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| 121 | }
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| 122 |
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| 123 | out = bio_open_owner(outfile, FORMAT_PEM, private);
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| 124 | if (out == NULL)
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| 125 | goto end;
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| 126 |
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| 127 | if (!app_RAND_load_file(NULL, 1) && inrand == NULL
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| 128 | && !RAND_status()) {
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| 129 | BIO_printf(bio_err,
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| 130 | "warning, not much extra random data, consider using the -rand option\n");
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| 131 | }
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| 132 | if (inrand != NULL)
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| 133 | BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
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| 134 | app_RAND_load_files(inrand));
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| 135 |
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| 136 | BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus\n",
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| 137 | num);
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| 138 | rsa = eng ? RSA_new_method(eng) : RSA_new();
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| 139 | if (rsa == NULL)
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| 140 | goto end;
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| 141 |
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| 142 | if (!BN_set_word(bn, f4) || !RSA_generate_key_ex(rsa, num, bn, cb))
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| 143 | goto end;
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| 144 |
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| 145 | app_RAND_write_file(NULL);
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| 146 |
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| 147 | RSA_get0_key(rsa, NULL, &e, NULL);
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| 148 | hexe = BN_bn2hex(e);
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| 149 | dece = BN_bn2dec(e);
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| 150 | if (hexe && dece) {
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| 151 | BIO_printf(bio_err, "e is %s (0x%s)\n", dece, hexe);
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| 152 | }
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| 153 | OPENSSL_free(hexe);
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| 154 | OPENSSL_free(dece);
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| 155 | cb_data.password = passout;
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| 156 | cb_data.prompt_info = outfile;
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| 157 | assert(private);
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| 158 | if (!PEM_write_bio_RSAPrivateKey(out, rsa, enc, NULL, 0,
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| 159 | (pem_password_cb *)password_callback,
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| 160 | &cb_data))
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| 161 | goto end;
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| 162 |
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| 163 | ret = 0;
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| 164 | end:
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| 165 | BN_free(bn);
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| 166 | BN_GENCB_free(cb);
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| 167 | RSA_free(rsa);
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| 168 | BIO_free_all(out);
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| 169 | release_engine(eng);
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| 170 | OPENSSL_free(passout);
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| 171 | if (ret != 0)
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| 172 | ERR_print_errors(bio_err);
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| 173 | return (ret);
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| 174 | }
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| 175 |
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| 176 | static int genrsa_cb(int p, int n, BN_GENCB *cb)
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| 177 | {
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| 178 | char c = '*';
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| 179 |
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| 180 | if (p == 0)
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| 181 | c = '.';
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| 182 | if (p == 1)
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| 183 | c = '+';
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| 184 | if (p == 2)
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| 185 | c = '*';
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| 186 | if (p == 3)
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| 187 | c = '\n';
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| 188 | BIO_write(BN_GENCB_get_arg(cb), &c, 1);
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| 189 | (void)BIO_flush(BN_GENCB_get_arg(cb));
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| 190 | return 1;
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| 191 | }
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| 192 | #endif
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