/* $OpenBSD: genrsa.c,v 1.22 2023/03/06 14:32:06 tb Exp $ */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include /* Until the key-gen callbacks are modified to use newer prototypes, we allow * deprecated functions for openssl-internal code */ #ifdef OPENSSL_NO_DEPRECATED #undef OPENSSL_NO_DEPRECATED #endif #include #include #include #include #include "apps.h" #include #include #include #include #include #include #include #define DEFBITS 2048 static int genrsa_cb(int p, int n, BN_GENCB *cb); static struct { const EVP_CIPHER *enc; unsigned long f4; char *outfile; char *passargout; } cfg; static int set_public_exponent(int argc, char **argv, int *argsused) { char *option = argv[0]; if (strcmp(option, "-3") == 0) cfg.f4 = 3; else if (strcmp(option, "-f4") == 0 || strcmp(option, "-F4") == 0) cfg.f4 = RSA_F4; else return (1); *argsused = 1; return (0); } static const EVP_CIPHER *get_cipher_by_name(char *name) { if (name == NULL || strcmp(name, "") == 0) return (NULL); #ifndef OPENSSL_NO_AES else if (strcmp(name, "aes128") == 0) return EVP_aes_128_cbc(); else if (strcmp(name, "aes192") == 0) return EVP_aes_192_cbc(); else if (strcmp(name, "aes256") == 0) return EVP_aes_256_cbc(); #endif #ifndef OPENSSL_NO_CAMELLIA else if (strcmp(name, "camellia128") == 0) return EVP_camellia_128_cbc(); else if (strcmp(name, "camellia192") == 0) return EVP_camellia_192_cbc(); else if (strcmp(name, "camellia256") == 0) return EVP_camellia_256_cbc(); #endif #ifndef OPENSSL_NO_DES else if (strcmp(name, "des") == 0) return EVP_des_cbc(); else if (strcmp(name, "des3") == 0) return EVP_des_ede3_cbc(); #endif #ifndef OPENSSL_NO_IDEA else if (strcmp(name, "idea") == 0) return EVP_idea_cbc(); #endif else return (NULL); } static int set_enc(int argc, char **argv, int *argsused) { char *name = argv[0]; if (*name++ != '-') return (1); if ((cfg.enc = get_cipher_by_name(name)) == NULL) return (1); *argsused = 1; return (0); } static const struct option genrsa_options[] = { { .name = "3", .desc = "Use 3 for the E value", .type = OPTION_ARGV_FUNC, .opt.argvfunc = set_public_exponent, }, { .name = "f4", .desc = "Use F4 (0x10001) for the E value", .type = OPTION_ARGV_FUNC, .opt.argvfunc = set_public_exponent, }, { .name = "F4", .desc = "Use F4 (0x10001) for the E value", .type = OPTION_ARGV_FUNC, .opt.argvfunc = set_public_exponent, }, #ifndef OPENSSL_NO_AES { .name = "aes128", .desc = "Encrypt PEM output with CBC AES", .type = OPTION_ARGV_FUNC, .opt.argvfunc = set_enc, }, { .name = "aes192", .desc = "Encrypt PEM output with CBC AES", .type = OPTION_ARGV_FUNC, .opt.argvfunc = set_enc, }, { .name = "aes256", .desc = "Encrypt PEM output with CBC AES", .type = OPTION_ARGV_FUNC, .opt.argvfunc = set_enc, }, #endif #ifndef OPENSSL_NO_CAMELLIA { .name = "camellia128", .desc = "Encrypt PEM output with CBC Camellia", .type = OPTION_ARGV_FUNC, .opt.argvfunc = set_enc, }, { .name = "camellia192", .desc = "Encrypt PEM output with CBC Camellia", .type = OPTION_ARGV_FUNC, .opt.argvfunc = set_enc, }, { .name = "camellia256", .desc = "Encrypt PEM output with CBC Camellia", .type = OPTION_ARGV_FUNC, .opt.argvfunc = set_enc, }, #endif #ifndef OPENSSL_NO_DES { .name = "des", .desc = "Encrypt the generated key with DES in CBC mode", .type = OPTION_ARGV_FUNC, .opt.argvfunc = set_enc, }, { .name = "des3", .desc = "Encrypt the generated key with DES in EDE CBC mode (168 bit key)", .type = OPTION_ARGV_FUNC, .opt.argvfunc = set_enc, }, #endif #ifndef OPENSSL_NO_IDEA { .name = "idea", .desc = "Encrypt the generated key with IDEA in CBC mode", .type = OPTION_ARGV_FUNC, .opt.argvfunc = set_enc, }, #endif { .name = "out", .argname = "file", .desc = "Output the key to 'file'", .type = OPTION_ARG, .opt.arg = &cfg.outfile, }, { .name = "passout", .argname = "arg", .desc = "Output file passphrase source", .type = OPTION_ARG, .opt.arg = &cfg.passargout, }, { NULL }, }; static void genrsa_usage(void) { fprintf(stderr, "usage: genrsa [-3 | -f4] [-aes128 | -aes192 |"); fprintf(stderr, " -aes256 |\n"); fprintf(stderr, " -camellia128 | -camellia192 | -camellia256 |"); fprintf(stderr, " -des | -des3 | -idea]\n"); fprintf(stderr, " [-out file] [-passout arg] [numbits]\n\n"); options_usage(genrsa_options); fprintf(stderr, "\n"); } int genrsa_main(int argc, char **argv) { BN_GENCB *cb = NULL; int ret = 1; int num = DEFBITS; char *numbits = NULL; char *passout = NULL; BIO *out = NULL; BIGNUM *bn = NULL; RSA *rsa = NULL; char *rsa_e_hex = NULL, *rsa_e_dec = NULL; if (pledge("stdio cpath wpath rpath tty", NULL) == -1) { perror("pledge"); exit(1); } if ((bn = BN_new()) == NULL) goto err; if ((cb = BN_GENCB_new()) == NULL) { BIO_printf(bio_err, "Error allocating BN_GENCB object\n"); goto err; } BN_GENCB_set(cb, genrsa_cb, bio_err); if ((out = BIO_new(BIO_s_file())) == NULL) { BIO_printf(bio_err, "unable to create BIO for output\n"); goto err; } memset(&cfg, 0, sizeof(cfg)); cfg.f4 = RSA_F4; if (options_parse(argc, argv, genrsa_options, &numbits, NULL) != 0) { genrsa_usage(); goto err; } if ((numbits != NULL) && ((sscanf(numbits, "%d", &num) == 0) || (num < 0))) { genrsa_usage(); goto err; } if (!app_passwd(bio_err, NULL, cfg.passargout, NULL, &passout)) { BIO_printf(bio_err, "Error getting password\n"); goto err; } if (cfg.outfile == NULL) { BIO_set_fp(out, stdout, BIO_NOCLOSE); } else { if (BIO_write_filename(out, cfg.outfile) <= 0) { perror(cfg.outfile); goto err; } } BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus\n", num); rsa = RSA_new(); if (!rsa) goto err; if (!BN_set_word(bn, cfg.f4) || !RSA_generate_key_ex(rsa, num, bn, cb)) goto err; if ((rsa_e_hex = BN_bn2hex(RSA_get0_e(rsa))) == NULL) goto err; if ((rsa_e_dec = BN_bn2dec(RSA_get0_e(rsa))) == NULL) goto err; BIO_printf(bio_err, "e is %s (0x%s)\n", rsa_e_dec, rsa_e_hex); { PW_CB_DATA cb_data; cb_data.password = passout; cb_data.prompt_info = cfg.outfile; if (!PEM_write_bio_RSAPrivateKey(out, rsa, cfg.enc, NULL, 0, password_callback, &cb_data)) goto err; } ret = 0; err: BN_free(bn); BN_GENCB_free(cb); RSA_free(rsa); BIO_free_all(out); free(rsa_e_dec); free(rsa_e_hex); free(passout); if (ret != 0) ERR_print_errors(bio_err); return (ret); } static int genrsa_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)); return 1; }