C++ RSA_new函数代码示例

static int
set_private_key(hx509_context context, hx509_cert cert, SecKeyRef pkey)
{
    const SubjectPublicKeyInfo *spi;
    const Certificate *c;
    struct kc_rsa *kc;
    RSAPublicKey pk;
    hx509_private_key key;
    size_t size;
    RSA *rsa;
    int ret;

    ret = hx509_private_key_init(&key, NULL, NULL);
    if (ret)
	return ret;

    kc = calloc(1, sizeof(*kc));
    if (kc == NULL)
	_hx509_abort("out of memory");

    CFRetain(pkey);
    kc->pkey = pkey;

    rsa = RSA_new();
    if (rsa == NULL)
	_hx509_abort("out of memory");

    RSA_set_method(rsa, &kc_rsa_pkcs1_method);
    ret = RSA_set_app_data(rsa, kc);
    if (ret != 1)
	_hx509_abort("RSA_set_app_data");

    /*
     * Set up n and e to please RSA_size()
     */

    c = _hx509_get_cert(cert);
    spi = &c->tbsCertificate.subjectPublicKeyInfo;

    ret = decode_RSAPublicKey(spi->subjectPublicKey.data,
			      spi->subjectPublicKey.length / 8,
			      &pk, &size);
    if (ret) {
	RSA_free(rsa);
	return 0;
    }
    rsa->n = _hx509_int2BN(&pk.modulus);
    rsa->e = _hx509_int2BN(&pk.publicExponent);
    free_RSAPublicKey(&pk);

    kc->keysize = BN_num_bytes(rsa->n);

    /*
     *
     */

    hx509_private_key_assign_rsa(key, rsa);
    _hx509_cert_set_key(cert, key);

    hx509_private_key_free(&key);

    return 0;
}

static int test_check_crt_components(void)
{
    const int P = 15;
    const int Q = 17;
    const int E = 5;
    const int N = P*Q;
    const int DP = 3;
    const int DQ = 13;
    const int QINV = 8;

    int ret = 0;
    RSA *key = NULL;
    BN_CTX *ctx = NULL;
    BIGNUM *p = NULL, *q = NULL, *e = NULL;

    ret = TEST_ptr(key = RSA_new())
          && TEST_ptr(ctx = BN_CTX_new())
          && TEST_ptr(p = BN_new())
          && TEST_ptr(q = BN_new())
          && TEST_ptr(e = BN_new())
          && TEST_true(BN_set_word(p, P))
          && TEST_true(BN_set_word(q, Q))
          && TEST_true(BN_set_word(e, E))
          && TEST_true(RSA_set0_factors(key, p, q));
    if (!ret) {
        BN_free(p);
        BN_free(q);
        goto end;
    }
    ret = TEST_true(rsa_sp800_56b_derive_params_from_pq(key, 8, e, ctx))
          && TEST_BN_eq_word(key->n, N)
          && TEST_BN_eq_word(key->dmp1, DP)
          && TEST_BN_eq_word(key->dmq1, DQ)
          && TEST_BN_eq_word(key->iqmp, QINV)
          && TEST_true(rsa_check_crt_components(key, ctx))
          /* (a) 1 < dP < (p – 1). */
          && TEST_true(BN_set_word(key->dmp1, 1))
          && TEST_false(rsa_check_crt_components(key, ctx))
          && TEST_true(BN_set_word(key->dmp1, P-1))
          && TEST_false(rsa_check_crt_components(key, ctx))
          && TEST_true(BN_set_word(key->dmp1, DP))
          /* (b) 1 < dQ < (q - 1). */
          && TEST_true(BN_set_word(key->dmq1, 1))
          && TEST_false(rsa_check_crt_components(key, ctx))
          && TEST_true(BN_set_word(key->dmq1, Q-1))
          && TEST_false(rsa_check_crt_components(key, ctx))
          && TEST_true(BN_set_word(key->dmq1, DQ))
          /* (c) 1 < qInv < p */
          && TEST_true(BN_set_word(key->iqmp, 1))
          && TEST_false(rsa_check_crt_components(key, ctx))
          && TEST_true(BN_set_word(key->iqmp, P))
          && TEST_false(rsa_check_crt_components(key, ctx))
          && TEST_true(BN_set_word(key->iqmp, QINV))
          /* (d) 1 = (dP . e) mod (p - 1)*/
          && TEST_true(BN_set_word(key->dmp1, DP+1))
          && TEST_false(rsa_check_crt_components(key, ctx))
          && TEST_true(BN_set_word(key->dmp1, DP))
          /* (e) 1 = (dQ . e) mod (q - 1) */
          && TEST_true(BN_set_word(key->dmq1, DQ-1))
          && TEST_false(rsa_check_crt_components(key, ctx))
          && TEST_true(BN_set_word(key->dmq1, DQ))
          /* (f) 1 = (qInv . q) mod p */
          && TEST_true(BN_set_word(key->iqmp, QINV+1))
          && TEST_false(rsa_check_crt_components(key, ctx))
          && TEST_true(BN_set_word(key->iqmp, QINV))
          /* check defaults are still valid */
          && TEST_true(rsa_check_crt_components(key, ctx));
end:
    BN_free(e);
    RSA_free(key);
    BN_CTX_free(ctx);
    return ret;
}

	void DtlsTransport::GenerateCertificateAndPrivateKey()
	{
		MS_TRACE();

		int ret = 0;
		BIGNUM* bne = nullptr;
		RSA* rsa_key = nullptr;
		int num_bits = 1024;
		X509_NAME* cert_name = nullptr;

		// Create a big number object.
		bne = BN_new();
		if (!bne)
		{
			LOG_OPENSSL_ERROR("BN_new() failed");
			goto error;
		}

		ret = BN_set_word(bne, RSA_F4);  // RSA_F4 == 65537.
		if (ret == 0)
		{
			LOG_OPENSSL_ERROR("BN_set_word() failed");
			goto error;
		}

		// Generate a RSA key.
		rsa_key = RSA_new();
		if (!rsa_key)
		{
			LOG_OPENSSL_ERROR("RSA_new() failed");
			goto error;
		}

		// This takes some time.
		ret = RSA_generate_key_ex(rsa_key, num_bits, bne, nullptr);
		if (ret == 0)
		{
			LOG_OPENSSL_ERROR("RSA_generate_key_ex() failed");
			goto error;
		}

		// Create a private key object (needed to hold the RSA key).
		DtlsTransport::privateKey = EVP_PKEY_new();
		if (!DtlsTransport::privateKey)
		{
			LOG_OPENSSL_ERROR("EVP_PKEY_new() failed");
			goto error;
		}

		ret = EVP_PKEY_assign_RSA(DtlsTransport::privateKey, rsa_key);
		if (ret == 0)
		{
			LOG_OPENSSL_ERROR("EVP_PKEY_assign_RSA() failed");
			goto error;
		}
		// The RSA key now belongs to the private key, so don't clean it up separately.
		rsa_key = nullptr;

		// Create the X509 certificate.
		DtlsTransport::certificate = X509_new();
		if (!DtlsTransport::certificate)
		{
			LOG_OPENSSL_ERROR("X509_new() failed");
			goto error;
		}

		// Set version 3 (note that 0 means version 1).
		X509_set_version(DtlsTransport::certificate, 2);

		// Set serial number (avoid default 0).
		ASN1_INTEGER_set(X509_get_serialNumber(DtlsTransport::certificate), (long)Utils::Crypto::GetRandomUInt(1000000, 9999999));

		// Set valid period.
		X509_gmtime_adj(X509_get_notBefore(DtlsTransport::certificate), -1*60*60*24*365*10);  // - 10 years.
		X509_gmtime_adj(X509_get_notAfter(DtlsTransport::certificate), 60*60*24*365*10);  // 10 years.

		// Set the public key for the certificate using the key.
		ret = X509_set_pubkey(DtlsTransport::certificate, DtlsTransport::privateKey);
		if (ret == 0)
		{
			LOG_OPENSSL_ERROR("X509_set_pubkey() failed");
			goto error;
		}

		// Set certificate fields.
		cert_name = X509_get_subject_name(DtlsTransport::certificate);
		if (!cert_name)
		{
			LOG_OPENSSL_ERROR("X509_get_subject_name() failed");
			goto error;
		}
		X509_NAME_add_entry_by_txt(cert_name, "O", MBSTRING_ASC, (uint8_t*)MS_APP_NAME, -1, -1, 0);
		X509_NAME_add_entry_by_txt(cert_name, "CN", MBSTRING_ASC, (uint8_t*)MS_APP_NAME, -1, -1, 0);

		// It is self-signed so set the issuer name to be the same as the subject.
		ret = X509_set_issuer_name(DtlsTransport::certificate, cert_name);
		if (ret == 0)
		{
			LOG_OPENSSL_ERROR("X509_set_issuer_name() failed");
			goto error;
//.........这里部分代码省略.........

static LUA_FUNCTION(openssl_pkey_new)
{
  EVP_PKEY *pkey = NULL;
  const char* alg = "rsa";

  if (lua_isnoneornil(L, 1) || lua_isstring(L, 1))
  {
    alg = luaL_optstring(L, 1, alg);

    if (strcasecmp(alg, "rsa") == 0)
    {
      int bits = luaL_optint(L, 2, 1024);
      int e = luaL_optint(L, 3, 65537);
      RSA* rsa = RSA_new();

      BIGNUM *E = BN_new();
      BN_set_word(E, e);
      if (RSA_generate_key_ex(rsa, bits, E, NULL))
      {
        pkey = EVP_PKEY_new();
        EVP_PKEY_assign_RSA(pkey, rsa);
      }
      else
        RSA_free(rsa);
      BN_free(E);
    }
    else if (strcasecmp(alg, "dsa") == 0)
    {
      int bits = luaL_optint(L, 2, 1024);
      size_t seed_len = 0;
      const char* seed = luaL_optlstring(L, 3, NULL, &seed_len);

      DSA *dsa = DSA_new();
      if (DSA_generate_parameters_ex(dsa, bits, (byte*)seed, seed_len, NULL, NULL, NULL)
          && DSA_generate_key(dsa))
      {
        pkey = EVP_PKEY_new();
        EVP_PKEY_assign_DSA(pkey, dsa);
      }
      else
        DSA_free(dsa);
    }
    else if (strcasecmp(alg, "dh") == 0)
    {
      int bits = luaL_optint(L, 2, 512);
      int generator = luaL_optint(L, 3, 2);

      DH* dh = DH_new();
      if (DH_generate_parameters_ex(dh, bits, generator, NULL))
      {
        if (DH_generate_key(dh))
        {
          pkey = EVP_PKEY_new();
          EVP_PKEY_assign_DH(pkey, dh);
        }
        else
          DH_free(dh);
      }
      else
        DH_free(dh);
    }
#ifndef OPENSSL_NO_EC
    else if (strcasecmp(alg, "ec") == 0)
    {
      EC_KEY *ec = NULL;
      EC_GROUP *group = openssl_get_ec_group(L, 2, 3, 4);
      if (!group)
        luaL_error(L, "failed to get ec_group object");
      ec = EC_KEY_new();
      if (ec)
      {
        EC_KEY_set_group(ec, group);
        EC_GROUP_free(group);
        if (EC_KEY_generate_key(ec))
        {
          pkey = EVP_PKEY_new();
          EVP_PKEY_assign_EC_KEY(pkey, ec);
        }
        else
          EC_KEY_free(ec);
      }
      else
        EC_GROUP_free(group);

    }
#endif
    else
    {
      luaL_error(L, "not support %s!!!!", alg);
    }
  }
  else if (lua_istable(L, 1))
  {
    lua_getfield(L, 1, "alg");
    alg = luaL_optstring(L, -1, alg);
    lua_pop(L, 1);
    if (strcasecmp(alg, "rsa") == 0)
    {
      pkey = EVP_PKEY_new();
      if (pkey)
//.........这里部分代码省略.........

//.........这里部分代码省略.........
	    keynote_errno = ERROR_MEMORY;
	    return -1;
	}

	kk = dc->dec_key;
	if (keytype == KEYNOTE_PRIVATE_KEY)
	{
	    if (d2i_DSAPrivateKey((DSA **) &kk,(const unsigned char **) &decoded, len) == NULL) {
		free(ptr);
		DSA_free(kk);
		keynote_errno = ERROR_SYNTAX; /* Could be a memory error */
		return -1;
	    }
	}
	else
	{
	    if (d2i_DSAPublicKey((DSA **) &kk, (const unsigned char **) &decoded, len) == NULL) {
		free(ptr);
		DSA_free(kk);
		keynote_errno = ERROR_SYNTAX; /* Could be a memory error */
		return -1;
	    }
	}

	free(ptr);

	return 0;
    }

    /* RSA-PKCS1-HEX */
    if ((dc->dec_algorithm == KEYNOTE_ALGORITHM_RSA) &&
        (internalencoding == INTERNAL_ENC_PKCS1))
    {
        dc->dec_key = RSA_new();
        if (dc->dec_key == NULL) {
            keynote_errno = ERROR_MEMORY;
            return -1;
        }

        kk = dc->dec_key;
        if (keytype == KEYNOTE_PRIVATE_KEY)
        {
            if (d2i_RSAPrivateKey((RSA **) &kk, (const unsigned char **) &decoded, len) == NULL) {
                free(ptr);
                RSA_free(kk);
                keynote_errno = ERROR_SYNTAX; /* Could be a memory error */
                return -1;
            }
	    if (RSA_blinding_on((RSA *) kk, NULL) != 1) {
                free(ptr);
                RSA_free(kk);
                keynote_errno = ERROR_MEMORY;
                return -1;
	    }		
        }
        else
        {
            if (d2i_RSAPublicKey((RSA **) &kk, (const unsigned char **) &decoded, len) == NULL) {
                free(ptr);
                RSA_free(kk);
                keynote_errno = ERROR_SYNTAX; /* Could be a memory error */
                return -1;
            }
        }

        free(ptr);

//.........这里部分代码省略.........
        BIO_printf(bio_err, " -3              use 3 for the E value\n");
# ifndef OPENSSL_NO_ENGINE
        BIO_printf(bio_err,
                   " -engine e       use engine e, possibly a hardware device.\n");
# endif
        BIO_printf(bio_err, " -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR,
                   LIST_SEPARATOR_CHAR);
        BIO_printf(bio_err,
                   "                 load the file (or the files in the directory) into\n");
        BIO_printf(bio_err, "                 the random number generator\n");
        goto err;
    }

    ERR_load_crypto_strings();

    if (!app_passwd(bio_err, NULL, passargout, NULL, &passout)) {
        BIO_printf(bio_err, "Error getting password\n");
        goto err;
    }
# ifndef OPENSSL_NO_ENGINE
    e = setup_engine(bio_err, engine, 0);
# endif

    if (outfile == NULL) {
        BIO_set_fp(out, stdout, BIO_NOCLOSE);
# ifdef OPENSSL_SYS_VMS
        {
            BIO *tmpbio = BIO_new(BIO_f_linebuffer());
            out = BIO_push(tmpbio, out);
        }
# endif
    } else {
        if (BIO_write_filename(out, outfile) <= 0) {
            perror(outfile);
            goto err;
        }
    }

    if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL
        && !RAND_status()) {
        BIO_printf(bio_err,
                   "warning, not much extra random data, consider using the -rand option\n");
    }
    if (inrand != NULL)
        BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
                   app_RAND_load_files(inrand));

    BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus\n",
               num);
# ifdef OPENSSL_NO_ENGINE
    rsa = RSA_new();
# else
    rsa = RSA_new_method(e);
# endif
    if (!rsa)
        goto err;

    if (!BN_set_word(bn, f4) || !RSA_generate_key_ex(rsa, num, bn, &cb))
        goto err;

    app_RAND_write_file(NULL, bio_err);

    /*
     * We need to do the following for when the base number size is < long,
     * esp windows 3.1 :-(.
     */
    l = 0L;
    for (i = 0; i < rsa->e->top; i++) {
# ifndef SIXTY_FOUR_BIT
        l <<= BN_BITS4;
        l <<= BN_BITS4;
# endif
        l += rsa->e->d[i];
    }
    BIO_printf(bio_err, "e is %ld (0x%lX)\n", l, l);
    {
        PW_CB_DATA cb_data;
        cb_data.password = passout;
        cb_data.prompt_info = outfile;
        if (!PEM_write_bio_RSAPrivateKey(out, rsa, enc, NULL, 0,
                                         (pem_password_cb *)password_callback,
                                         &cb_data))
            goto err;
    }

    ret = 0;
 err:
    if (bn)
        BN_free(bn);
    if (rsa)
        RSA_free(rsa);
    if (out)
        BIO_free_all(out);
    if (passout)
        OPENSSL_free(passout);
    if (ret != 0)
        ERR_print_errors(bio_err);
    apps_shutdown();
    OPENSSL_EXIT(ret);
}

soter_status_t soter_rsa_priv_key_to_engine_specific(const soter_container_hdr_t *key, size_t key_length, soter_engine_specific_rsa_key_t **engine_key)
{
	int rsa_mod_size;
	RSA *rsa;
	EVP_PKEY *pkey = (EVP_PKEY *)(*engine_key);
	const uint32_t *pub_exp;
	const unsigned char *curr_bn = (const unsigned char *)(key + 1);

	if (key_length != ntohl(key->size))
	{
		return SOTER_INVALID_PARAMETER;
	}

	/* Validate tag */
	if (memcmp(key->tag, RSA_PRIV_KEY_PREF, strlen(RSA_PRIV_KEY_PREF)))
	{
		return SOTER_INVALID_PARAMETER;
	}

	if (SOTER_SUCCESS != soter_verify_container_checksum(key))
	{
		return SOTER_DATA_CORRUPT;
	}

	switch (key->tag[3])
	{
	case '1':
		rsa_mod_size = 128;
		break;
	case '2':
		rsa_mod_size = 256;
		break;
	case '4':
		rsa_mod_size = 512;
		break;
	case '8':
		rsa_mod_size = 1024;
		break;
	default:
		return SOTER_INVALID_PARAMETER;
	}

	if (key_length < rsa_priv_key_size(rsa_mod_size))
	{
		return SOTER_INVALID_PARAMETER;
	}

	pub_exp = (const uint32_t *)(curr_bn + ((rsa_mod_size * 4) + (rsa_mod_size / 2)));;
	switch (ntohl(*pub_exp))
	{
	case RSA_3:
	case RSA_F4:
		break;
	default:
		return SOTER_INVALID_PARAMETER;
	}

	rsa = RSA_new();
	if (!rsa)
	{
		return SOTER_NO_MEMORY;
	}

	rsa->e = BN_new();
	if (!(rsa->e))
	{
		RSA_free(rsa);
		return SOTER_NO_MEMORY;
	}

	if (!BN_set_word(rsa->e, ntohl(*pub_exp)))
	{
		RSA_free(rsa);
		return SOTER_FAIL;
	}

	/* Private exponent */
	rsa->d = BN_new();
	if (!(rsa->d))
	{
		RSA_free(rsa);
		return SOTER_NO_MEMORY;
	}

	if (!BN_bin2bn(curr_bn, rsa_mod_size, rsa->d))
	{
		RSA_free(rsa);
		return SOTER_FAIL;
	}
	curr_bn += rsa_mod_size;

	/* p */
	rsa->p = BN_new();
	if (!(rsa->p))
	{
		RSA_free(rsa);
		return SOTER_NO_MEMORY;
	}

	if (!BN_bin2bn(curr_bn, rsa_mod_size / 2, rsa->p))
//.........这里部分代码省略.........

void openssl_rsa_crypt()
{
	RSA *r;
	BIO *b;
	BIGNUM *bne;
	unsigned int len;
	int size, elen, dlen;
	unsigned char inputs[COMM_LEN] = "rsa crypt";
	unsigned char tmps[MAX1_LEN], outputs[MAX1_LEN];

	memset(tmps, 0, sizeof(tmps));
	memset(outputs, 0, sizeof(outputs));
	printf("\nRSA generate key:\n");
	bne = BN_new();
	BN_set_word(bne, RSA_3);
	r = RSA_new();
	RSA_generate_key_ex(r, MAX1_LEN, bne, NULL);
	RSA_print_fp(stdout, r, 11);
	b = BIO_new_file("/tmp/rsa.key", "w");
	i2d_RSAPrivateKey_bio(b, r);
	BIO_free(b);

	elen = RSA_private_encrypt(RSA_size(r) - 11,
							   inputs, outputs, r, RSA_PKCS1_PADDING);
	dlen = RSA_public_decrypt(elen, outputs, tmps, r, RSA_PKCS1_PADDING);
	if (elen <= 0 || dlen <= 0 || memcmp(inputs, tmps, RSA_size(r) - 11)) {
		printf("RSA_private_encrypt error!\n");
		RSA_free(r);
		return;
	}
	printf("RSA_private_encrypt(%s) = ", inputs);
	for (size = 0; size < elen; size++)
		printf("%02x", outputs[size]);
	printf("\n");

	memset(outputs, 0, sizeof(outputs));
	elen = RSA_public_encrypt(RSA_size(r) - 11,
							  inputs, outputs, r, RSA_PKCS1_PADDING);
	dlen = RSA_private_decrypt(elen, outputs, tmps, r, RSA_PKCS1_PADDING);
	if (elen <= 0 || dlen <= 0 || memcmp(inputs, tmps, RSA_size(r) - 11)) {
		printf("RSA_public_encrypt error!\n");
		RSA_free(r);
		return;
	}
	printf("RSA_public_encrypt(%s) = ", inputs);
	for (size = 0; size < elen; size++)
		printf("%02x", outputs[size]);
	printf("\n");

	memset(outputs, 0, sizeof(outputs));
	RSA_sign(NID_md5_sha1, inputs, 36, outputs, &len, r);
	printf("RSA_sign(%s) = ", inputs);
	for (size = 0; size < len; size++)
		printf("%02x", outputs[size]);
	printf("\n");

	memset(tmps, 0, sizeof(tmps));
	RSA_verify(NID_md5_sha1, inputs, 36, outputs, len, r);
	printf("RSA_verify(");
	for (size = 0; size < len; size++)
		printf("%02x", outputs[size]);
	printf(") = %s\n", inputs);

	RSA_free(r);
}

//.........这里部分代码省略.........
    if (iscrypt == 'y')
    {
        if (RSA_private_decrypt
            (crypt_len, recvbuffer + CF_RSA_PROTO_OFFSET, decrypted_nonce, PRIVKEY, RSA_PKCS1_PADDING) <= 0)
        {
            err = ERR_get_error();

            Log(LOG_LEVEL_ERR,
                "Private decrypt failed = '%s'. Probably the client has the wrong public key for this server",
                ERR_reason_error_string(err));
            free(decrypted_nonce);
            return false;
        }
    }
    else
    {
        if (nonce_len > crypt_len)
        {
            Log(LOG_LEVEL_ERR, "Illegal challenge");
            free(decrypted_nonce);
            return false;
        }

        memcpy(decrypted_nonce, recvbuffer + CF_RSA_PROTO_OFFSET, nonce_len);
    }

/* Client's ID is now established by key or trusted, reply with digest */

    HashString(decrypted_nonce, nonce_len, digest, digestType);

    free(decrypted_nonce);

/* Get the public key from the client */
    newkey = RSA_new();

/* proposition C2 */
    if ((len_n = ReceiveTransaction(conn->conn_info, recvbuffer, NULL)) == -1)
    {
        Log(LOG_LEVEL_INFO, "Protocol error 1 in RSA authentation from IP %s", conn->hostname);
        RSA_free(newkey);
        return false;
    }

    if (len_n == 0)
    {
        Log(LOG_LEVEL_INFO, "Protocol error 2 in RSA authentation from IP %s", conn->hostname);
        RSA_free(newkey);
        return false;
    }

    if ((newkey->n = BN_mpi2bn(recvbuffer, len_n, NULL)) == NULL)
    {
        err = ERR_get_error();
        Log(LOG_LEVEL_ERR, "Private decrypt failed = %s", ERR_reason_error_string(err));
        RSA_free(newkey);
        return false;
    }

/* proposition C3 */

    if ((len_e = ReceiveTransaction(conn->conn_info, recvbuffer, NULL)) == -1)
    {
        Log(LOG_LEVEL_INFO, "Protocol error 3 in RSA authentation from IP %s", conn->hostname);
        RSA_free(newkey);
        return false;
    }

RSA *RSA_generate_key(int bits, unsigned long e_value,
	     void (*callback)(int,int,void *), void *cb_arg)
	{
	RSA *rsa=NULL;
	BIGNUM *r0=NULL,*r1=NULL,*r2=NULL,*r3=NULL,*tmp;
	int bitsp,bitsq,ok= -1,n=0;
	unsigned i;
	BN_CTX *ctx=NULL,*ctx2=NULL;

	ctx=BN_CTX_new();
	if (ctx == NULL) goto err;
	ctx2=BN_CTX_new();
	if (ctx2 == NULL) goto err;
	BN_CTX_start(ctx);
	r0 = BN_CTX_get(ctx);
	r1 = BN_CTX_get(ctx);
	r2 = BN_CTX_get(ctx);
	r3 = BN_CTX_get(ctx);
	if (r3 == NULL) goto err;

	bitsp=(bits+1)/2;
	bitsq=bits-bitsp;
	rsa=RSA_new();
	if (rsa == NULL) goto err;

	/* set e */ 
	rsa->e=BN_new();
	if (rsa->e == NULL) goto err;

#if 1
	/* The problem is when building with 8, 16, or 32 BN_ULONG,
	 * unsigned long can be larger */
	for (i=0; i<sizeof(unsigned long)*8; i++)
		{
		if (e_value & (((unsigned long)1)<<i))
			BN_set_bit(rsa->e,i);
		}
#else
	if (!BN_set_word(rsa->e,e_value)) goto err;
#endif

	/* generate p and q */
	for (;;)
		{
		rsa->p=BN_generate_prime(NULL,bitsp,0,NULL,NULL,callback,cb_arg);
		if (rsa->p == NULL) goto err;
		if (!BN_sub(r2,rsa->p,BN_value_one())) goto err;
		if (!BN_gcd(r1,r2,rsa->e,ctx)) goto err;
		if (BN_is_one(r1)) break;
		if (callback != NULL) callback(2,n++,cb_arg);
		BN_free(rsa->p);
		}
	if (callback != NULL) callback(3,0,cb_arg);
	for (;;)
		{
		rsa->q=BN_generate_prime(NULL,bitsq,0,NULL,NULL,callback,cb_arg);
		if (rsa->q == NULL) goto err;
		if (!BN_sub(r2,rsa->q,BN_value_one())) goto err;
		if (!BN_gcd(r1,r2,rsa->e,ctx)) goto err;
		if (BN_is_one(r1) && (BN_cmp(rsa->p,rsa->q) != 0))
			break;
		if (callback != NULL) callback(2,n++,cb_arg);
		BN_free(rsa->q);
		}
	if (callback != NULL) callback(3,1,cb_arg);
	if (BN_cmp(rsa->p,rsa->q) < 0)
		{
		tmp=rsa->p;
		rsa->p=rsa->q;
		rsa->q=tmp;
		}

	/* calculate n */
	rsa->n=BN_new();
	if (rsa->n == NULL) goto err;
	if (!BN_mul(rsa->n,rsa->p,rsa->q,ctx)) goto err;

	/* calculate d */
	if (!BN_sub(r1,rsa->p,BN_value_one())) goto err;	/* p-1 */
	if (!BN_sub(r2,rsa->q,BN_value_one())) goto err;	/* q-1 */
	if (!BN_mul(r0,r1,r2,ctx)) goto err;	/* (p-1)(q-1) */

/* should not be needed, since gcd(p-1,e) == 1 and gcd(q-1,e) == 1 */
/*	for (;;)
		{
		if (!BN_gcd(r3,r0,rsa->e,ctx)) goto err;
		if (BN_is_one(r3)) break;

		if (1)
			{
			if (!BN_add_word(rsa->e,2L)) goto err;
			continue;
			}
		RSAerr(RSA_F_RSA_GENERATE_KEY,RSA_R_BAD_E_VALUE);
		goto err;
		}
*/
	rsa->d=BN_mod_inverse(NULL,rsa->e,r0,ctx2);	/* d */
	if (rsa->d == NULL) goto err;

//.........这里部分代码省略.........

void openssl_x509_crl()
{
	RSA *r;
	BIO *bp;
	int len;
	FILE *fp;
	BIGNUM *bne;
	X509_CRL *crl;
	EVP_PKEY *pkey;
	X509_NAME *issuer;
	ASN1_INTEGER *serial;
	X509_REVOKED *revoked;
	ASN1_TIME *lastUpdate, *nextUpdate, *rvTime;
	unsigned char *buf, *p, tmp[MAX1_LEN] = "crl cert";

	printf("\nX509_CRL info:\n");
	bne = BN_new();
	BN_set_word(bne, RSA_3);
	r = RSA_new();
	RSA_generate_key_ex(r, MAX1_LEN, bne, NULL);
	pkey = EVP_PKEY_new();
	EVP_PKEY_assign_RSA(pkey, r);

	crl = X509_CRL_new();
	X509_CRL_set_version(crl, 3);

	issuer = X509_NAME_new();
	X509_NAME_add_entry_by_NID(issuer, NID_commonName,
								V_ASN1_PRINTABLESTRING, tmp, 10, -1, 0);
	X509_CRL_set_issuer_name(crl, issuer);

	lastUpdate = ASN1_TIME_new();
	ASN1_TIME_set(lastUpdate, time(NULL));
	X509_CRL_set_lastUpdate(crl, lastUpdate);

	nextUpdate = ASN1_TIME_new();
	ASN1_TIME_set(nextUpdate, time(NULL) + 1280);
	X509_CRL_set_nextUpdate(crl, nextUpdate);

	revoked = X509_REVOKED_new();
	serial = ASN1_INTEGER_new();
	ASN1_INTEGER_set(serial, 1280);
	X509_REVOKED_set_serialNumber(revoked, serial);

	rvTime = ASN1_TIME_new();
	ASN1_TIME_set(rvTime, time(NULL) + 2000);
	X509_CRL_set_nextUpdate(crl, rvTime);
	X509_REVOKED_set_revocationDate(revoked, rvTime);

	X509_CRL_add0_revoked(crl, revoked);
	X509_CRL_sort(crl);
	X509_CRL_sign(crl, pkey, EVP_md5());

	bp = BIO_new(BIO_s_file());
	BIO_set_fp(bp, stdout, BIO_NOCLOSE);
	X509_CRL_print(bp, crl);
	len = i2d_X509_CRL(crl, NULL);
	buf = (unsigned char *)malloc(len + 10);
	p = buf;
	len = i2d_X509_CRL(crl, &p);
	fp = fopen("/tmp/crl.crl", "wb");
	fwrite(buf, 1, len, fp);
	fclose(fp);

	free(buf);
	BIO_free(bp);
	X509_CRL_free(crl);
}

RSA *
sldns_key_buf2rsa_raw(unsigned char* key, size_t len)
{
	uint16_t offset;
	uint16_t exp;
	uint16_t int16;
	RSA *rsa;
	BIGNUM *modulus;
	BIGNUM *exponent;

	if (len == 0)
		return NULL;
	if (key[0] == 0) {
		if(len < 3)
			return NULL;
		memmove(&int16, key+1, 2);
		exp = ntohs(int16);
		offset = 3;
	} else {
		exp = key[0];
		offset = 1;
	}

	/* key length at least one */
	if(len < (size_t)offset + exp + 1)
		return NULL;

	/* Exponent */
	exponent = BN_new();
	if(!exponent) return NULL;
	(void) BN_bin2bn(key+offset, (int)exp, exponent);
	offset += exp;

	/* Modulus */
	modulus = BN_new();
	if(!modulus) {
		BN_free(exponent);
		return NULL;
	}
	/* length of the buffer must match the key length! */
	(void) BN_bin2bn(key+offset, (int)(len - offset), modulus);

	rsa = RSA_new();
	if(!rsa) {
		BN_free(exponent);
		BN_free(modulus);
		return NULL;
	}
#if OPENSSL_VERSION_NUMBER < 0x10100000 || defined(HAVE_LIBRESSL)
#ifndef S_SPLINT_S
	rsa->n = modulus;
	rsa->e = exponent;
#endif /* splint */

#else /* OPENSSL_VERSION_NUMBER */
	if (!RSA_set0_key(rsa, modulus, exponent, NULL)) {
		BN_free(exponent);
		BN_free(modulus);
		RSA_free(rsa);
		return NULL;
	}
#endif

	return rsa;
}

//.........这里部分代码省略.........
    {
        Log(LOG_LEVEL_ERR,
            "Private decrypt failed, abandoning. (RSA_private_decrypt: %s)",
            CryptoLastErrorString());
        RSA_free(server_pubkey);
        return false;
    }

/* proposition C4 */
    if (FIPS_MODE)
    {
        HashString(decrypted_cchall, nonce_len, digest, CF_DEFAULT_DIGEST);
    }
    else
    {
        HashString(decrypted_cchall, nonce_len, digest, HASH_METHOD_MD5);
    }

    if (FIPS_MODE)
    {
        SendTransaction(conn->conn_info, digest, CF_DEFAULT_DIGEST_LEN, CF_DONE);
    }
    else
    {
        SendTransaction(conn->conn_info, digest, CF_MD5_LEN, CF_DONE);
    }

    free(decrypted_cchall);

/* If we don't have the server's public key, it will be sent */

    if (server_pubkey == NULL)
    {
        RSA *newkey = RSA_new();

        Log(LOG_LEVEL_VERBOSE, "Collecting public key from server!");

        /* proposition S4 - conditional */
        if ((len = ReceiveTransaction(conn->conn_info, in, NULL)) <= 0)
        {
            Log(LOG_LEVEL_ERR, "Protocol error in RSA authentation from IP '%s'", conn->this_server);
            return false;
        }

        if ((newkey->n = BN_mpi2bn(in, len, NULL)) == NULL)
        {
            Log(LOG_LEVEL_ERR,
                "Private key decrypt failed. (BN_mpi2bn: %s)",
                CryptoLastErrorString());
            RSA_free(newkey);
            return false;
        }

        /* proposition S5 - conditional */

        if ((len = ReceiveTransaction(conn->conn_info, in, NULL)) <= 0)
        {
            Log(LOG_LEVEL_INFO, "Protocol error in RSA authentation from IP '%s'",
                 conn->this_server);
            RSA_free(newkey);
            return false;
        }

        if ((newkey->e = BN_mpi2bn(in, len, NULL)) == NULL)
        {
            Log(LOG_LEVEL_ERR,

/*
  Generate a public/private RSA keypair, and ask for a file to store
  them in.
*/
static bool keygen(int bits) {
	BIGNUM *e = NULL;
	RSA *rsa_key;
	FILE *f;
	char filename[PATH_MAX];
	BN_GENCB *cb;
	int result;

	fprintf(stderr, "Generating %d bits keys:\n", bits);

	cb = BN_GENCB_new();

	if(!cb) {
		abort();
	}

	BN_GENCB_set(cb, indicator, NULL);

	rsa_key = RSA_new();

	if(BN_hex2bn(&e, "10001") == 0) {
		abort();
	}

	if(!rsa_key || !e) {
		abort();
	}

	result = RSA_generate_key_ex(rsa_key, bits, e, cb);

	BN_free(e);
	BN_GENCB_free(cb);

	if(!result) {
		fprintf(stderr, "Error during key generation!\n");
		RSA_free(rsa_key);
		return false;
	} else {
		fprintf(stderr, "Done.\n");
	}

	snprintf(filename, sizeof(filename), "%s/rsa_key.priv", confbase);
	f = ask_and_open(filename, "private RSA key");

	if(!f) {
		RSA_free(rsa_key);
		return false;
	}

#ifdef HAVE_FCHMOD
	/* Make it unreadable for others. */
	fchmod(fileno(f), 0600);
#endif

	fputc('\n', f);
	PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
	fclose(f);

	char *name = get_name();

	if(name) {
		snprintf(filename, sizeof(filename), "%s/hosts/%s", confbase, name);
		free(name);
	} else {
		snprintf(filename, sizeof(filename), "%s/rsa_key.pub", confbase);
	}

	f = ask_and_open(filename, "public RSA key");

	if(!f) {
		RSA_free(rsa_key);
		return false;
	}

	fputc('\n', f);
	PEM_write_RSAPublicKey(f, rsa_key);
	fclose(f);

	RSA_free(rsa_key);

	return true;
}

int
tls_ctx_use_external_private_key (struct tls_root_ctx *ctx,
    const char *cert_file, const char *cert_file_inline)
{
  RSA *rsa = NULL;
  RSA *pub_rsa;
  RSA_METHOD *rsa_meth;
  X509 *cert = NULL;

  ASSERT (NULL != ctx);

  tls_ctx_load_cert_file_and_copy (ctx, cert_file, cert_file_inline, &cert);

  ASSERT (NULL != cert);

  /* allocate custom RSA method object */
  ALLOC_OBJ_CLEAR (rsa_meth, RSA_METHOD);
  rsa_meth->name = "OpenVPN external private key RSA Method";
  rsa_meth->rsa_pub_enc = rsa_pub_enc;
  rsa_meth->rsa_pub_dec = rsa_pub_dec;
  rsa_meth->rsa_priv_enc = rsa_priv_enc;
  rsa_meth->rsa_priv_dec = rsa_priv_dec;
  rsa_meth->init = NULL;
  rsa_meth->finish = rsa_finish;
  rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK;
  rsa_meth->app_data = NULL;

  /* allocate RSA object */
  rsa = RSA_new();
  if (rsa == NULL)
    {
      SSLerr(SSL_F_SSL_USE_PRIVATEKEY, ERR_R_MALLOC_FAILURE);
      goto err;
    }

  /* get the public key */
  ASSERT(cert->cert_info->key->pkey); /* NULL before SSL_CTX_use_certificate() is called */
  pub_rsa = cert->cert_info->key->pkey->pkey.rsa;

  /* initialize RSA object */
  rsa->n = BN_dup(pub_rsa->n);
  rsa->flags |= RSA_FLAG_EXT_PKEY;
  if (!RSA_set_method(rsa, rsa_meth))
    goto err;

  /* bind our custom RSA object to ssl_ctx */
  if (!SSL_CTX_use_RSAPrivateKey(ctx->ctx, rsa))
    goto err;

  X509_free(cert);
  RSA_free(rsa); /* doesn't necessarily free, just decrements refcount */
  return 1;

 err:
  if (cert)
    X509_free(cert);
  if (rsa)
    RSA_free(rsa);
  else
    {
      if (rsa_meth)
	free(rsa_meth);
    }
  msg (M_SSLERR, "Cannot enable SSL external private key capability");
  return 0;
}