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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