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📄 CA.pl.in(7.4 KB)
📄 app_rand.c(2.18 KB)
📄 apps.c(72.85 KB)
📄 apps.h(24.69 KB)
📄 asn1pars.c(10.31 KB)
📄 bf_prefix.c(4.77 KB)
📄 build.info(2.32 KB)
📄 ca-cert.srl(3 B)
📄 ca-key.pem(916 B)
📄 ca-req.pem(635 B)
📄 ca.c(83.78 KB)
📄 cert.pem(623 B)
📄 ciphers.c(7.19 KB)
📄 client.pem(3.21 KB)
📄 cms.c(44.05 KB)
📄 crl.c(10.79 KB)
📄 crl2p7.c(6.18 KB)
📄 ct_log_list.cnf(412 B)
📄 dgst.c(18.17 KB)
📄 dh1024.pem(446 B)
📄 dh2048.pem(662 B)
📄 dh4096.pem(1007 B)
📄 dhparam.c(11.15 KB)
📄 dsa-ca.pem(2.66 KB)
📄 dsa-pca.pem(2.67 KB)
📄 dsa.c(7.53 KB)
📄 dsa1024.pem(455 B)
📄 dsa512.pem(280 B)
📄 dsap.pem(276 B)
📄 dsaparam.c(7.8 KB)
📄 ec.c(8.13 KB)
📄 ecparam.c(14.65 KB)
📄 enc.c(20.74 KB)
📄 engine.c(15.56 KB)
📄 errstr.c(1.83 KB)
📄 gendsa.c(3.92 KB)
📄 genpkey.c(8.64 KB)
📄 genrsa.c(5.36 KB)
📄 nseq.c(3 KB)
📄 ocsp.c(49.51 KB)
📄 openssl.c(21.23 KB)
📄 openssl.cnf(10.67 KB)
📄 opt.c(23.61 KB)
📄 passwd.c(26.43 KB)
📄 pca-cert.srl(3 B)
📄 pca-key.pem(916 B)
📄 pca-req.pem(635 B)
📄 pkcs12.c(30.81 KB)
📄 pkcs7.c(5.38 KB)
📄 pkcs8.c(11.26 KB)
📄 pkey.c(7.24 KB)
📄 pkeyparam.c(3.66 KB)
📄 pkeyutl.c(15.58 KB)
📄 prime.c(3.56 KB)
📄 privkey.pem(916 B)
📄 progs.h(16.05 KB)
📄 progs.pl(5.43 KB)
📄 rand.c(3.35 KB)
📄 rehash.c(15.3 KB)
📄 req.c(51.46 KB)
📄 req.pem(627 B)
📄 rsa.c(9.3 KB)
📄 rsa8192.pem(6.21 KB)
📄 rsautl.c(7.81 KB)
📄 s1024key.pem(891 B)
📄 s1024req.pem(643 B)
📄 s512-key.pem(497 B)
📄 s512-req.pem(460 B)
📄 s_apps.h(3.3 KB)
📄 s_cb.c(47.04 KB)
📄 s_client.c(115.39 KB)
📄 s_server.c(116.36 KB)
📄 s_socket.c(13.43 KB)
📄 s_time.c(11.92 KB)
📄 server.pem(2.79 KB)
📄 server.srl(3 B)
📄 server2.pem(3.21 KB)
📄 sess_id.c(5.4 KB)
📄 smime.c(20.95 KB)
📄 speed.c(120.17 KB)
📄 spkac.c(5.73 KB)
📄 srp.c(20.09 KB)
📄 storeutl.c(16.13 KB)
📄 testCA.pem(432 B)
📄 testdsa.h(11.77 KB)
📄 testrsa.h(121.12 KB)
📄 timeouts.h(560 B)
📄 ts.c(30.19 KB)
📄 tsget.in(6.45 KB)
📄 verify.c(10.52 KB)
📄 version.c(5.07 KB)
📄 x509.c(39.25 KB)

Editing: genrsa.c

/*
 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <openssl/opensslconf.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "apps.h"
#include "progs.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/bn.h>
#include <openssl/rsa.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/rand.h>

#define DEFBITS 2048
#define DEFPRIMES 2

static int genrsa_cb(int p, int n, BN_GENCB *cb);

typedef enum OPTION_choice {
    OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
    OPT_3, OPT_F4, OPT_ENGINE,
    OPT_OUT, OPT_PASSOUT, OPT_CIPHER, OPT_PRIMES,
    OPT_R_ENUM
} OPTION_CHOICE;

const OPTIONS genrsa_options[] = {
    {"help", OPT_HELP, '-', "Display this summary"},
    {"3", OPT_3, '-', "Use 3 for the E value"},
    {"F4", OPT_F4, '-', "Use F4 (0x10001) for the E value"},
    {"f4", OPT_F4, '-', "Use F4 (0x10001) for the E value"},
    {"out", OPT_OUT, '>', "Output the key to specified file"},
    OPT_R_OPTIONS,
    {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
    {"", OPT_CIPHER, '-', "Encrypt the output with any supported cipher"},
#ifndef OPENSSL_NO_ENGINE
    {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
#endif
    {"primes", OPT_PRIMES, 'p', "Specify number of primes"},
    {NULL}
};

int genrsa_main(int argc, char **argv)
{
    BN_GENCB *cb = BN_GENCB_new();
    PW_CB_DATA cb_data;
    ENGINE *eng = NULL;
    BIGNUM *bn = BN_new();
    BIO *out = NULL;
    const BIGNUM *e;
    RSA *rsa = NULL;
    const EVP_CIPHER *enc = NULL;
    int ret = 1, num = DEFBITS, private = 0, primes = DEFPRIMES;
    unsigned long f4 = RSA_F4;
    char *outfile = NULL, *passoutarg = NULL, *passout = NULL;
    char *prog, *hexe, *dece;
    OPTION_CHOICE o;

if (bn == NULL || cb == NULL)
        goto end;

BN_GENCB_set(cb, genrsa_cb, bio_err);

prog = opt_init(argc, argv, genrsa_options);
    while ((o = opt_next()) != OPT_EOF) {
        switch (o) {
        case OPT_EOF:
        case OPT_ERR:
opthelp:
            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
            goto end;
        case OPT_HELP:
            ret = 0;
            opt_help(genrsa_options);
            goto end;
        case OPT_3:
            f4 = 3;
            break;
        case OPT_F4:
            f4 = RSA_F4;
            break;
        case OPT_OUT:
            outfile = opt_arg();
            break;
        case OPT_ENGINE:
            eng = setup_engine(opt_arg(), 0);
            break;
        case OPT_R_CASES:
            if (!opt_rand(o))
                goto end;
            break;
        case OPT_PASSOUT:
            passoutarg = opt_arg();
            break;
        case OPT_CIPHER:
            if (!opt_cipher(opt_unknown(), &enc))
                goto end;
            break;
        case OPT_PRIMES:
            if (!opt_int(opt_arg(), &primes))
                goto end;
            break;
        }
    }
    argc = opt_num_rest();
    argv = opt_rest();

if (argc == 1) {
        if (!opt_int(argv[0], &num) || num <= 0)
            goto end;
        if (num > OPENSSL_RSA_MAX_MODULUS_BITS)
            BIO_printf(bio_err,
                       "Warning: It is not recommended to use more than %d bit for RSA keys.\n"
                       "         Your key size is %d! Larger key size may behave not as expected.\n",
                       OPENSSL_RSA_MAX_MODULUS_BITS, num);
    } else if (argc > 0) {
        BIO_printf(bio_err, "Extra arguments given.\n");
        goto opthelp;
    }

private = 1;
    if (!app_passwd(NULL, passoutarg, NULL, &passout)) {
        BIO_printf(bio_err, "Error getting password\n");
        goto end;
    }

out = bio_open_owner(outfile, FORMAT_PEM, private);
    if (out == NULL)
        goto end;

BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus (%d primes)\n",
               num, primes);
    rsa = eng ? RSA_new_method(eng) : RSA_new();
    if (rsa == NULL)
        goto end;

if (!BN_set_word(bn, f4)
        || !RSA_generate_multi_prime_key(rsa, num, primes, bn, cb))
        goto end;

RSA_get0_key(rsa, NULL, &e, NULL);
    hexe = BN_bn2hex(e);
    dece = BN_bn2dec(e);
    if (hexe && dece) {
        BIO_printf(bio_err, "e is %s (0x%s)\n", dece, hexe);
    }
    OPENSSL_free(hexe);
    OPENSSL_free(dece);
    cb_data.password = passout;
    cb_data.prompt_info = outfile;
    assert(private);
    if (!PEM_write_bio_RSAPrivateKey(out, rsa, enc, NULL, 0,
                                     (pem_password_cb *)password_callback,
                                     &cb_data))
        goto end;

ret = 0;
 end:
    BN_free(bn);
    BN_GENCB_free(cb);
    RSA_free(rsa);
    BIO_free_all(out);
    release_engine(eng);
    OPENSSL_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;
}

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Editing: genrsa.c

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