[331] | 1 | /*
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| 2 | * Copyright 2006-2016 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 <stdio.h>
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| 11 | #include <string.h>
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| 12 | #include "apps.h"
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| 13 | #include <openssl/pem.h>
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| 14 | #include <openssl/err.h>
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| 15 | #include <openssl/evp.h>
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| 16 | #ifndef OPENSSL_NO_ENGINE
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| 17 | # include <openssl/engine.h>
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| 18 | #endif
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| 19 |
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| 20 | static int init_keygen_file(EVP_PKEY_CTX **pctx, const char *file, ENGINE *e);
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| 21 | static int genpkey_cb(EVP_PKEY_CTX *ctx);
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| 22 |
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| 23 | typedef enum OPTION_choice {
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| 24 | OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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| 25 | OPT_ENGINE, OPT_OUTFORM, OPT_OUT, OPT_PASS, OPT_PARAMFILE,
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| 26 | OPT_ALGORITHM, OPT_PKEYOPT, OPT_GENPARAM, OPT_TEXT, OPT_CIPHER
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| 27 | } OPTION_CHOICE;
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| 28 |
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| 29 | OPTIONS genpkey_options[] = {
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| 30 | {"help", OPT_HELP, '-', "Display this summary"},
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| 31 | {"out", OPT_OUT, '>', "Output file"},
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| 32 | {"outform", OPT_OUTFORM, 'F', "output format (DER or PEM)"},
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| 33 | {"pass", OPT_PASS, 's', "Output file pass phrase source"},
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| 34 | {"paramfile", OPT_PARAMFILE, '<', "Parameters file"},
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| 35 | {"algorithm", OPT_ALGORITHM, 's', "The public key algorithm"},
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| 36 | {"pkeyopt", OPT_PKEYOPT, 's',
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| 37 | "Set the public key algorithm option as opt:value"},
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| 38 | {"genparam", OPT_GENPARAM, '-', "Generate parameters, not key"},
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| 39 | {"text", OPT_TEXT, '-', "Print the in text"},
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| 40 | {"", OPT_CIPHER, '-', "Cipher to use to encrypt the key"},
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| 41 | #ifndef OPENSSL_NO_ENGINE
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| 42 | {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
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| 43 | #endif
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| 44 | /* This is deliberately last. */
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| 45 | {OPT_HELP_STR, 1, 1,
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| 46 | "Order of options may be important! See the documentation.\n"},
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| 47 | {NULL}
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| 48 | };
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| 49 |
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| 50 | int genpkey_main(int argc, char **argv)
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| 51 | {
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| 52 | BIO *in = NULL, *out = NULL;
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| 53 | ENGINE *e = NULL;
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| 54 | EVP_PKEY *pkey = NULL;
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| 55 | EVP_PKEY_CTX *ctx = NULL;
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| 56 | char *outfile = NULL, *passarg = NULL, *pass = NULL, *prog;
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| 57 | const EVP_CIPHER *cipher = NULL;
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| 58 | OPTION_CHOICE o;
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| 59 | int outformat = FORMAT_PEM, text = 0, ret = 1, rv, do_param = 0;
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| 60 | int private = 0;
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| 61 |
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| 62 | prog = opt_init(argc, argv, genpkey_options);
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| 63 | while ((o = opt_next()) != OPT_EOF) {
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| 64 | switch (o) {
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| 65 | case OPT_EOF:
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| 66 | case OPT_ERR:
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| 67 | opthelp:
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| 68 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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| 69 | goto end;
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| 70 | case OPT_HELP:
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| 71 | ret = 0;
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| 72 | opt_help(genpkey_options);
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| 73 | goto end;
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| 74 | case OPT_OUTFORM:
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| 75 | if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
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| 76 | goto opthelp;
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| 77 | break;
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| 78 | case OPT_OUT:
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| 79 | outfile = opt_arg();
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| 80 | break;
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| 81 | case OPT_PASS:
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| 82 | passarg = opt_arg();
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| 83 | break;
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| 84 | case OPT_ENGINE:
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| 85 | e = setup_engine(opt_arg(), 0);
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| 86 | break;
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| 87 | case OPT_PARAMFILE:
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| 88 | if (do_param == 1)
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| 89 | goto opthelp;
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| 90 | if (!init_keygen_file(&ctx, opt_arg(), e))
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| 91 | goto end;
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| 92 | break;
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| 93 | case OPT_ALGORITHM:
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| 94 | if (!init_gen_str(&ctx, opt_arg(), e, do_param))
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| 95 | goto end;
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| 96 | break;
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| 97 | case OPT_PKEYOPT:
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| 98 | if (ctx == NULL) {
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| 99 | BIO_printf(bio_err, "%s: No keytype specified.\n", prog);
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| 100 | goto opthelp;
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| 101 | }
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| 102 | if (pkey_ctrl_string(ctx, opt_arg()) <= 0) {
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| 103 | BIO_printf(bio_err,
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| 104 | "%s: Error setting %s parameter:\n",
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| 105 | prog, opt_arg());
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| 106 | ERR_print_errors(bio_err);
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| 107 | goto end;
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| 108 | }
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| 109 | break;
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| 110 | case OPT_GENPARAM:
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| 111 | if (ctx != NULL)
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| 112 | goto opthelp;
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| 113 | do_param = 1;
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| 114 | break;
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| 115 | case OPT_TEXT:
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| 116 | text = 1;
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| 117 | break;
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| 118 | case OPT_CIPHER:
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| 119 | if (!opt_cipher(opt_unknown(), &cipher)
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| 120 | || do_param == 1)
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| 121 | goto opthelp;
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| 122 | }
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| 123 | }
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| 124 | argc = opt_num_rest();
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| 125 | if (argc != 0)
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| 126 | goto opthelp;
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| 127 |
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| 128 | private = do_param ? 0 : 1;
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| 129 |
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| 130 | if (ctx == NULL)
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| 131 | goto opthelp;
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| 132 |
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| 133 | if (!app_passwd(passarg, NULL, &pass, NULL)) {
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| 134 | BIO_puts(bio_err, "Error getting password\n");
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| 135 | goto end;
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| 136 | }
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| 137 |
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| 138 | out = bio_open_owner(outfile, outformat, private);
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| 139 | if (out == NULL)
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| 140 | goto end;
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| 141 |
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| 142 | EVP_PKEY_CTX_set_cb(ctx, genpkey_cb);
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| 143 | EVP_PKEY_CTX_set_app_data(ctx, bio_err);
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| 144 |
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| 145 | if (do_param) {
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| 146 | if (EVP_PKEY_paramgen(ctx, &pkey) <= 0) {
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| 147 | BIO_puts(bio_err, "Error generating parameters\n");
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| 148 | ERR_print_errors(bio_err);
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| 149 | goto end;
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| 150 | }
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| 151 | } else {
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| 152 | if (EVP_PKEY_keygen(ctx, &pkey) <= 0) {
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| 153 | BIO_puts(bio_err, "Error generating key\n");
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| 154 | ERR_print_errors(bio_err);
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| 155 | goto end;
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| 156 | }
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| 157 | }
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| 158 |
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| 159 | if (do_param)
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| 160 | rv = PEM_write_bio_Parameters(out, pkey);
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| 161 | else if (outformat == FORMAT_PEM) {
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| 162 | assert(private);
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| 163 | rv = PEM_write_bio_PrivateKey(out, pkey, cipher, NULL, 0, NULL, pass);
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| 164 | } else if (outformat == FORMAT_ASN1) {
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| 165 | assert(private);
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| 166 | rv = i2d_PrivateKey_bio(out, pkey);
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| 167 | } else {
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| 168 | BIO_printf(bio_err, "Bad format specified for key\n");
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| 169 | goto end;
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| 170 | }
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| 171 |
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| 172 | if (rv <= 0) {
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| 173 | BIO_puts(bio_err, "Error writing key\n");
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| 174 | ERR_print_errors(bio_err);
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| 175 | }
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| 176 |
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| 177 | if (text) {
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| 178 | if (do_param)
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| 179 | rv = EVP_PKEY_print_params(out, pkey, 0, NULL);
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| 180 | else
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| 181 | rv = EVP_PKEY_print_private(out, pkey, 0, NULL);
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| 182 |
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| 183 | if (rv <= 0) {
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| 184 | BIO_puts(bio_err, "Error printing key\n");
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| 185 | ERR_print_errors(bio_err);
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| 186 | }
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| 187 | }
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| 188 |
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| 189 | ret = 0;
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| 190 |
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| 191 | end:
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| 192 | EVP_PKEY_free(pkey);
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| 193 | EVP_PKEY_CTX_free(ctx);
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| 194 | BIO_free_all(out);
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| 195 | BIO_free(in);
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| 196 | release_engine(e);
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| 197 | OPENSSL_free(pass);
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| 198 | return ret;
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| 199 | }
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| 200 |
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| 201 | static int init_keygen_file(EVP_PKEY_CTX **pctx, const char *file, ENGINE *e)
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| 202 | {
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| 203 | BIO *pbio;
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| 204 | EVP_PKEY *pkey = NULL;
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| 205 | EVP_PKEY_CTX *ctx = NULL;
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| 206 | if (*pctx) {
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| 207 | BIO_puts(bio_err, "Parameters already set!\n");
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| 208 | return 0;
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| 209 | }
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| 210 |
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| 211 | pbio = BIO_new_file(file, "r");
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| 212 | if (!pbio) {
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| 213 | BIO_printf(bio_err, "Can't open parameter file %s\n", file);
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| 214 | return 0;
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| 215 | }
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| 216 |
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| 217 | pkey = PEM_read_bio_Parameters(pbio, NULL);
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| 218 | BIO_free(pbio);
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| 219 |
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| 220 | if (!pkey) {
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| 221 | BIO_printf(bio_err, "Error reading parameter file %s\n", file);
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| 222 | return 0;
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| 223 | }
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| 224 |
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| 225 | ctx = EVP_PKEY_CTX_new(pkey, e);
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| 226 | if (ctx == NULL)
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| 227 | goto err;
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| 228 | if (EVP_PKEY_keygen_init(ctx) <= 0)
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| 229 | goto err;
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| 230 | EVP_PKEY_free(pkey);
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| 231 | *pctx = ctx;
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| 232 | return 1;
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| 233 |
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| 234 | err:
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| 235 | BIO_puts(bio_err, "Error initializing context\n");
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| 236 | ERR_print_errors(bio_err);
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| 237 | EVP_PKEY_CTX_free(ctx);
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| 238 | EVP_PKEY_free(pkey);
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| 239 | return 0;
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| 240 |
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| 241 | }
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| 242 |
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| 243 | int init_gen_str(EVP_PKEY_CTX **pctx,
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| 244 | const char *algname, ENGINE *e, int do_param)
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| 245 | {
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| 246 | EVP_PKEY_CTX *ctx = NULL;
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| 247 | const EVP_PKEY_ASN1_METHOD *ameth;
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| 248 | ENGINE *tmpeng = NULL;
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| 249 | int pkey_id;
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| 250 |
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| 251 | if (*pctx) {
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| 252 | BIO_puts(bio_err, "Algorithm already set!\n");
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| 253 | return 0;
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| 254 | }
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| 255 |
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| 256 | ameth = EVP_PKEY_asn1_find_str(&tmpeng, algname, -1);
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| 257 |
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| 258 | #ifndef OPENSSL_NO_ENGINE
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| 259 | if (!ameth && e)
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| 260 | ameth = ENGINE_get_pkey_asn1_meth_str(e, algname, -1);
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| 261 | #endif
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| 262 |
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| 263 | if (!ameth) {
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| 264 | BIO_printf(bio_err, "Algorithm %s not found\n", algname);
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| 265 | return 0;
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| 266 | }
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| 267 |
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| 268 | ERR_clear_error();
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| 269 |
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| 270 | EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, ameth);
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| 271 | #ifndef OPENSSL_NO_ENGINE
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| 272 | ENGINE_finish(tmpeng);
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| 273 | #endif
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| 274 | ctx = EVP_PKEY_CTX_new_id(pkey_id, e);
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| 275 |
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| 276 | if (!ctx)
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| 277 | goto err;
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| 278 | if (do_param) {
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| 279 | if (EVP_PKEY_paramgen_init(ctx) <= 0)
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| 280 | goto err;
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| 281 | } else {
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| 282 | if (EVP_PKEY_keygen_init(ctx) <= 0)
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| 283 | goto err;
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| 284 | }
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| 285 |
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| 286 | *pctx = ctx;
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| 287 | return 1;
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| 288 |
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| 289 | err:
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| 290 | BIO_printf(bio_err, "Error initializing %s context\n", algname);
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| 291 | ERR_print_errors(bio_err);
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| 292 | EVP_PKEY_CTX_free(ctx);
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| 293 | return 0;
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| 294 |
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| 295 | }
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| 296 |
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| 297 | static int genpkey_cb(EVP_PKEY_CTX *ctx)
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| 298 | {
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| 299 | char c = '*';
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| 300 | BIO *b = EVP_PKEY_CTX_get_app_data(ctx);
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| 301 | int p;
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| 302 | p = EVP_PKEY_CTX_get_keygen_info(ctx, 0);
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| 303 | if (p == 0)
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| 304 | c = '.';
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| 305 | if (p == 1)
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| 306 | c = '+';
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| 307 | if (p == 2)
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| 308 | c = '*';
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| 309 | if (p == 3)
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| 310 | c = '\n';
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| 311 | BIO_write(b, &c, 1);
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| 312 | (void)BIO_flush(b);
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| 313 | return 1;
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| 314 | }
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