1 /* 2 * Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include <stdio.h> 11 #include <string.h> 12 #include "apps.h" 13 #include "progs.h" 14 #include <openssl/pem.h> 15 #include <openssl/err.h> 16 #include <openssl/evp.h> 17 #ifndef OPENSSL_NO_ENGINE 18 # include <openssl/engine.h> 19 #endif 20 21 static int init_keygen_file(EVP_PKEY_CTX **pctx, const char *file, ENGINE *e); 22 static int genpkey_cb(EVP_PKEY_CTX *ctx); 23 24 typedef enum OPTION_choice { 25 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, 26 OPT_ENGINE, OPT_OUTFORM, OPT_OUT, OPT_PASS, OPT_PARAMFILE, 27 OPT_ALGORITHM, OPT_PKEYOPT, OPT_GENPARAM, OPT_TEXT, OPT_CIPHER 28 } OPTION_CHOICE; 29 30 const OPTIONS genpkey_options[] = { 31 {"help", OPT_HELP, '-', "Display this summary"}, 32 {"out", OPT_OUT, '>', "Output file"}, 33 {"outform", OPT_OUTFORM, 'F', "output format (DER or PEM)"}, 34 {"pass", OPT_PASS, 's', "Output file pass phrase source"}, 35 {"paramfile", OPT_PARAMFILE, '<', "Parameters file"}, 36 {"algorithm", OPT_ALGORITHM, 's', "The public key algorithm"}, 37 {"pkeyopt", OPT_PKEYOPT, 's', 38 "Set the public key algorithm option as opt:value"}, 39 {"genparam", OPT_GENPARAM, '-', "Generate parameters, not key"}, 40 {"text", OPT_TEXT, '-', "Print the in text"}, 41 {"", OPT_CIPHER, '-', "Cipher to use to encrypt the key"}, 42 #ifndef OPENSSL_NO_ENGINE 43 {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"}, 44 #endif 45 /* This is deliberately last. */ 46 {OPT_HELP_STR, 1, 1, 47 "Order of options may be important! See the documentation.\n"}, 48 {NULL} 49 }; 50 51 int genpkey_main(int argc, char **argv) 52 { 53 BIO *in = NULL, *out = NULL; 54 ENGINE *e = NULL; 55 EVP_PKEY *pkey = NULL; 56 EVP_PKEY_CTX *ctx = NULL; 57 char *outfile = NULL, *passarg = NULL, *pass = NULL, *prog; 58 const EVP_CIPHER *cipher = NULL; 59 OPTION_CHOICE o; 60 int outformat = FORMAT_PEM, text = 0, ret = 1, rv, do_param = 0; 61 int private = 0; 62 63 prog = opt_init(argc, argv, genpkey_options); 64 while ((o = opt_next()) != OPT_EOF) { 65 switch (o) { 66 case OPT_EOF: 67 case OPT_ERR: 68 opthelp: 69 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); 70 goto end; 71 case OPT_HELP: 72 ret = 0; 73 opt_help(genpkey_options); 74 goto end; 75 case OPT_OUTFORM: 76 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat)) 77 goto opthelp; 78 break; 79 case OPT_OUT: 80 outfile = opt_arg(); 81 break; 82 case OPT_PASS: 83 passarg = opt_arg(); 84 break; 85 case OPT_ENGINE: 86 e = setup_engine(opt_arg(), 0); 87 break; 88 case OPT_PARAMFILE: 89 if (do_param == 1) 90 goto opthelp; 91 if (!init_keygen_file(&ctx, opt_arg(), e)) 92 goto end; 93 break; 94 case OPT_ALGORITHM: 95 if (!init_gen_str(&ctx, opt_arg(), e, do_param)) 96 goto end; 97 break; 98 case OPT_PKEYOPT: 99 if (ctx == NULL) { 100 BIO_printf(bio_err, "%s: No keytype specified.\n", prog); 101 goto opthelp; 102 } 103 if (pkey_ctrl_string(ctx, opt_arg()) <= 0) { 104 BIO_printf(bio_err, 105 "%s: Error setting %s parameter:\n", 106 prog, opt_arg()); 107 ERR_print_errors(bio_err); 108 goto end; 109 } 110 break; 111 case OPT_GENPARAM: 112 if (ctx != NULL) 113 goto opthelp; 114 do_param = 1; 115 break; 116 case OPT_TEXT: 117 text = 1; 118 break; 119 case OPT_CIPHER: 120 if (!opt_cipher(opt_unknown(), &cipher) 121 || do_param == 1) 122 goto opthelp; 123 if (EVP_CIPHER_mode(cipher) == EVP_CIPH_GCM_MODE || 124 EVP_CIPHER_mode(cipher) == EVP_CIPH_CCM_MODE || 125 EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE || 126 EVP_CIPHER_mode(cipher) == EVP_CIPH_OCB_MODE) { 127 BIO_printf(bio_err, "%s: cipher mode not supported\n", prog); 128 goto end; 129 } 130 } 131 } 132 argc = opt_num_rest(); 133 if (argc != 0) 134 goto opthelp; 135 136 private = do_param ? 0 : 1; 137 138 if (ctx == NULL) 139 goto opthelp; 140 141 if (!app_passwd(passarg, NULL, &pass, NULL)) { 142 BIO_puts(bio_err, "Error getting password\n"); 143 goto end; 144 } 145 146 out = bio_open_owner(outfile, outformat, private); 147 if (out == NULL) 148 goto end; 149 150 EVP_PKEY_CTX_set_cb(ctx, genpkey_cb); 151 EVP_PKEY_CTX_set_app_data(ctx, bio_err); 152 153 if (do_param) { 154 if (EVP_PKEY_paramgen(ctx, &pkey) <= 0) { 155 BIO_puts(bio_err, "Error generating parameters\n"); 156 ERR_print_errors(bio_err); 157 goto end; 158 } 159 } else { 160 if (EVP_PKEY_keygen(ctx, &pkey) <= 0) { 161 BIO_puts(bio_err, "Error generating key\n"); 162 ERR_print_errors(bio_err); 163 goto end; 164 } 165 } 166 167 if (do_param) { 168 rv = PEM_write_bio_Parameters(out, pkey); 169 } else if (outformat == FORMAT_PEM) { 170 assert(private); 171 rv = PEM_write_bio_PrivateKey(out, pkey, cipher, NULL, 0, NULL, pass); 172 } else if (outformat == FORMAT_ASN1) { 173 assert(private); 174 rv = i2d_PrivateKey_bio(out, pkey); 175 } else { 176 BIO_printf(bio_err, "Bad format specified for key\n"); 177 goto end; 178 } 179 180 ret = 0; 181 182 if (rv <= 0) { 183 BIO_puts(bio_err, "Error writing key\n"); 184 ERR_print_errors(bio_err); 185 ret = 1; 186 } 187 188 if (text) { 189 if (do_param) 190 rv = EVP_PKEY_print_params(out, pkey, 0, NULL); 191 else 192 rv = EVP_PKEY_print_private(out, pkey, 0, NULL); 193 194 if (rv <= 0) { 195 BIO_puts(bio_err, "Error printing key\n"); 196 ERR_print_errors(bio_err); 197 ret = 1; 198 } 199 } 200 201 end: 202 EVP_PKEY_free(pkey); 203 EVP_PKEY_CTX_free(ctx); 204 BIO_free_all(out); 205 BIO_free(in); 206 release_engine(e); 207 OPENSSL_free(pass); 208 return ret; 209 } 210 211 static int init_keygen_file(EVP_PKEY_CTX **pctx, const char *file, ENGINE *e) 212 { 213 BIO *pbio; 214 EVP_PKEY *pkey = NULL; 215 EVP_PKEY_CTX *ctx = NULL; 216 if (*pctx) { 217 BIO_puts(bio_err, "Parameters already set!\n"); 218 return 0; 219 } 220 221 pbio = BIO_new_file(file, "r"); 222 if (!pbio) { 223 BIO_printf(bio_err, "Can't open parameter file %s\n", file); 224 return 0; 225 } 226 227 pkey = PEM_read_bio_Parameters(pbio, NULL); 228 BIO_free(pbio); 229 230 if (!pkey) { 231 BIO_printf(bio_err, "Error reading parameter file %s\n", file); 232 return 0; 233 } 234 235 ctx = EVP_PKEY_CTX_new(pkey, e); 236 if (ctx == NULL) 237 goto err; 238 if (EVP_PKEY_keygen_init(ctx) <= 0) 239 goto err; 240 EVP_PKEY_free(pkey); 241 *pctx = ctx; 242 return 1; 243 244 err: 245 BIO_puts(bio_err, "Error initializing context\n"); 246 ERR_print_errors(bio_err); 247 EVP_PKEY_CTX_free(ctx); 248 EVP_PKEY_free(pkey); 249 return 0; 250 251 } 252 253 int init_gen_str(EVP_PKEY_CTX **pctx, 254 const char *algname, ENGINE *e, int do_param) 255 { 256 EVP_PKEY_CTX *ctx = NULL; 257 const EVP_PKEY_ASN1_METHOD *ameth; 258 ENGINE *tmpeng = NULL; 259 int pkey_id; 260 261 if (*pctx) { 262 BIO_puts(bio_err, "Algorithm already set!\n"); 263 return 0; 264 } 265 266 ameth = EVP_PKEY_asn1_find_str(&tmpeng, algname, -1); 267 268 #ifndef OPENSSL_NO_ENGINE 269 if (!ameth && e) 270 ameth = ENGINE_get_pkey_asn1_meth_str(e, algname, -1); 271 #endif 272 273 if (!ameth) { 274 BIO_printf(bio_err, "Algorithm %s not found\n", algname); 275 return 0; 276 } 277 278 ERR_clear_error(); 279 280 EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, ameth); 281 #ifndef OPENSSL_NO_ENGINE 282 ENGINE_finish(tmpeng); 283 #endif 284 ctx = EVP_PKEY_CTX_new_id(pkey_id, e); 285 286 if (!ctx) 287 goto err; 288 if (do_param) { 289 if (EVP_PKEY_paramgen_init(ctx) <= 0) 290 goto err; 291 } else { 292 if (EVP_PKEY_keygen_init(ctx) <= 0) 293 goto err; 294 } 295 296 *pctx = ctx; 297 return 1; 298 299 err: 300 BIO_printf(bio_err, "Error initializing %s context\n", algname); 301 ERR_print_errors(bio_err); 302 EVP_PKEY_CTX_free(ctx); 303 return 0; 304 305 } 306 307 static int genpkey_cb(EVP_PKEY_CTX *ctx) 308 { 309 char c = '*'; 310 BIO *b = EVP_PKEY_CTX_get_app_data(ctx); 311 int p; 312 p = EVP_PKEY_CTX_get_keygen_info(ctx, 0); 313 if (p == 0) 314 c = '.'; 315 if (p == 1) 316 c = '+'; 317 if (p == 2) 318 c = '*'; 319 if (p == 3) 320 c = '\n'; 321 BIO_write(b, &c, 1); 322 (void)BIO_flush(b); 323 return 1; 324 } 325