C++ RSA_free函数代码示例

bool hostupdate_h(connection_t *c) {
	/* FIXME: Whoah! Even more!! */
	char rawfile[MAX_STRING_SIZE];
	char rawhost[MAX_STRING_SIZE], b64host[MAX_STRING_SIZE];
	char rawdgst[MAX_STRING_SIZE], b64dgst[MAX_STRING_SIZE];
	char updname[MAX_STRING_SIZE], hosttoupd[MAX_STRING_SIZE];
	char *fname;
	FILE *fp;
	size_t slen, dlen, rlen;
	RSA *updkey;

	/* We ignore host files updates, maybe for reason */
	if (ignorenetupdates() || ignorehostsupdates()) return true;

	/* handle received host data, check sign, (over)write on disk */
	if (sscanf(c->buffer,
		"%*d " MAX_STRING " " MAX_STRING " " MAX_STRING " %zd %zd " MAX_STRING,
		updname, hosttoupd, b64host, &slen, &dlen, b64dgst) != 6) {
		logger(LOG_ERR, "Got bad %s from %s (%s)", "HOSTUPDATE", c->name, c->hostname);
		return false;
	}

	/* verify the originating node is permitted to send updates */
	if (dontverifyupdatepermission()) goto _next;
	if(!getconf_bool_node_offline(updname, "HostsFilesMaster")) {
		ifdebug(PROTOCOL) logger(LOG_WARNING,
		"Ignoring hosts update request originating from %s [which came from %s (%s)]",
		updname, c->name, c->hostname);

		return true;
	}

	/* some other sanity checks */
_next:	if (!isvalidfname(updname)) {
		logger(LOG_ERR,
		"Got bogus updater name \"%s\" from %s (%s) (from: %s)",
		updname, c->name, c->hostname, updname);

		return false;
	}

	if (!isvalidfname(hosttoupd)) {
		logger(LOG_ERR,
		"Got bogus update name \"%s\" from %s (%s) (from: %s)",
		hosttoupd, c->name, c->hostname, updname);

		return false;
	}

	if (slen >= MAX_STRING_SIZE || dlen >= MAX_STRING_SIZE) {
		logger(LOG_ERR,
		"HOSTUPDATE string sizes for %s are bigger than buffer can fit (%zd, %zd)",
		hosttoupd, slen, dlen);

		return false;
	}

	/* verify it */
	if (dontverifyupdatesignature()) goto _out;
	if (!read_rsa_public_key_offline(updname, &updkey)) {
		logger(LOG_ERR, "Could not find public key for %s", updname);
		return true;
	}
	base64_decode(b64dgst, rawdgst, sizeof(rawdgst)-1);
	snprintf(rawhost, sizeof(rawhost), "%s %s %s %zd %zd",
		updname, hosttoupd, b64host, slen, dlen);
	rlen = strlen(rawhost);
	if (!EVP_verify(updkey, rawdgst, dlen, rawhost, rlen)) {
		logger(LOG_WARNING,
		"Ignoring hosts update request with bad signature from %s for %s"
		" [which came from %s (%s)]",
		updname, hosttoupd, c->name, c->hostname);

		RSA_free(updkey);
		return true;
	}
	RSA_free(updkey);

	/* neighbours return us our own packets */
_out:	if (!strcmp(updname, myself->name)) return true;

	/* All right, let's start updating */

	xasprintf(&fname, "%s/hosts/%s", confbase, hosttoupd);

	/* Tell others if needed */
	if (!dontforwardhostsupdates()) {
		exceptmasters = true;
		forward_request(c);
	}

	/* Check if it's a START marker */
	if (!strcmp(updname, hosttoupd) && !strcmp(b64host, "START")) {
		/* Run pre-update script (embedded devices do remount,rw fs for example)
		 We really need to run this once, so that's why there are START and END markers */
		run_script("hostsupdate-before");
		/* That's it folks! Waiting for files to arrive */
		free(fname);
		return true;
	}
//.........这里部分代码省略.........

char *js_public_encrypt(const char *plain_text, const char *public_key_path) {
    RSA *rsa_publicKey = NULL;
    FILE *fp_publicKey;
    int rsa_public_len;
    
    if ((fp_publicKey = fopen(public_key_path, "r")) == NULL) {
        printf("Could not open %s\n", public_key_path);
        return '\0';
    }
    
    if ((rsa_publicKey = PEM_read_RSA_PUBKEY(fp_publicKey, NULL, NULL, NULL)) == NULL) {
        printf("Error loading RSA Public Key File.");
        return '\0';
    }
    fclose(fp_publicKey);
    
    rsa_public_len = RSA_size(rsa_publicKey);
    printf("RSA public length: %d\n", rsa_public_len);
    
    // 11 bytes is overhead required for encryption
    int chunk_length = rsa_public_len - 11;
    // plain text length
    int plain_char_len = strlen(plain_text);
    // calculate the number of chunks
    int num_of_chunks = (strlen(plain_text) / chunk_length) + 1;
    
    int total_cipher_length = 0;
    
    // the output size is (total number of chunks) x (the key length)
    int encrypted_size = (num_of_chunks * rsa_public_len);
    unsigned char *cipher_data = malloc(encrypted_size + 1);
    
    char *err = NULL;
    for (int i = 0; i < plain_char_len; i += chunk_length) {
        // take out chunk of plain text
        unsigned char *plain_chunk = malloc(chunk_length + 1);
        memcpy(&plain_chunk[0], &plain_text[i], chunk_length);
        
        printf("Plain chunk: %s\n", plain_chunk);
        
        unsigned char *result_chunk = malloc(rsa_public_len + 1);
        
        int result_length = RSA_public_encrypt(chunk_length, plain_chunk, result_chunk, rsa_publicKey, RSA_PKCS1_PADDING);
        printf("Encrypted Result chunk: %s\nEncrypted Chunk length: %d\n", result_chunk, result_length);
        
        if (result_length == -1) {
            ERR_load_CRYPTO_strings();
            fprintf(stderr, "Error %s\n", ERR_error_string(ERR_get_error(), err));
            fprintf(stderr, "Error %s\n", err);
        }
        
        memcpy(&cipher_data[total_cipher_length], &result_chunk[0], result_length);
        
        total_cipher_length += result_length;
    }
    printf("Total cipher length: %d\n", total_cipher_length);
    
    RSA_free(rsa_publicKey);
    size_t total_len = 0;
    char *encrypted = base64_encode(cipher_data, encrypted_size, &total_len);
    printf("Final result: %s\n Final result length: %zu\n", encrypted, total_len);
    
    return encrypted;
}

RSA_Helper::~RSA_Helper(){
	if(key){
		RSA_free(key);
		CRYPTO_cleanup_all_ex_data();
	}
}

static void int_rsa_free(EVP_PKEY *pkey)
	{
	RSA_free(pkey->pkey.rsa);
	}

//.........这里部分代码省略.........
	BIO *mem = NULL;

	sc_file_t *prkf = NULL;

	if (obj->type != SC_PKCS15_TYPE_PRKEY_RSA) {
		return SC_ERROR_NOT_SUPPORTED;
	}

#if OPENSSL_VERSION_NUMBER>=0x00908000L
	rsa = RSA_new();
	bn = BN_new();
	mem = BIO_new(BIO_s_mem());

	if(rsa == NULL || bn == NULL || mem == NULL)
	{
		r = SC_ERROR_OUT_OF_MEMORY;
		goto out;
	}

	if(!BN_set_word(bn, RSA_F4) ||
		!RSA_generate_key_ex(rsa, key_info->modulus_length, bn, NULL))
#else
	mem = BIO_new(BIO_s_mem());

	if(mem == NULL)
	{
		r = SC_ERROR_OUT_OF_MEMORY;
		goto out;
	}

	rsa = RSA_generate_key(key_info->modulus_length, RSA_F4, NULL, NULL);
	if (!rsa)
#endif
	{
		r = SC_ERROR_UNKNOWN;
		goto out;
	}

	RSA_set_method(rsa, RSA_PKCS1_OpenSSL());

	if(pubkey != NULL)
	{
		if(!i2d_RSAPublicKey_bio(mem, rsa))
		{
			r = SC_ERROR_UNKNOWN;
			goto out;
		}

		lg = BIO_get_mem_data(mem, &p);

		pubkey->algorithm = SC_ALGORITHM_RSA;

		r = sc_pkcs15_decode_pubkey(p15card->card->ctx, pubkey, p, lg);
		if (r < 0)
			goto out;
	}

	(void) BIO_reset(mem);

	if(!i2d_RSAPrivateKey_bio(mem, rsa))
	{
		r = SC_ERROR_UNKNOWN;
		goto out;
	}

	lg = BIO_get_mem_data(mem, &p);

	/* Get the private key file */
	r = sc_profile_get_file_by_path(profile, &key_info->path, &prkf);
	if (r < 0)
	{
		char pbuf[SC_MAX_PATH_STRING_SIZE];

		r = sc_path_print(pbuf, sizeof(pbuf), &key_info->path);
		if (r != SC_SUCCESS)
			pbuf[0] = '\0';

		goto out;
	}

	prkf->size = lg;

	r = sc_pkcs15init_create_file(profile, p15card, prkf);
	if(r) goto out;

	r = sc_pkcs15init_update_file(profile, p15card, prkf, p, lg);
	if(r) goto out;

out:
	if(mem)
		BIO_free(mem);
	if(bn)
		BN_free(bn);
	if(rsa)
		RSA_free(rsa);
	sc_file_free(prkf);

	return r;
#endif
}

static isc_result_t
opensslrsa_todns(const dst_key_t *key, isc_buffer_t *data) {
	isc_region_t r;
	unsigned int e_bytes;
	unsigned int mod_bytes;
	isc_result_t ret;
	RSA *rsa;
#if USE_EVP
	EVP_PKEY *pkey;
#endif

#if USE_EVP
	REQUIRE(key->keydata.pkey != NULL);
#else
	REQUIRE(key->keydata.rsa != NULL);
#endif

#if USE_EVP
	pkey = key->keydata.pkey;
	rsa = EVP_PKEY_get1_RSA(pkey);
	if (rsa == NULL)
		return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
#else
	rsa = key->keydata.rsa;
#endif

	isc_buffer_availableregion(data, &r);

	e_bytes = BN_num_bytes(rsa->e);
	mod_bytes = BN_num_bytes(rsa->n);

	if (e_bytes < 256) {	/*%< key exponent is <= 2040 bits */
		if (r.length < 1)
			DST_RET(ISC_R_NOSPACE);
		isc_buffer_putuint8(data, (isc_uint8_t) e_bytes);
		isc_region_consume(&r, 1);
	} else {
		if (r.length < 3)
			DST_RET(ISC_R_NOSPACE);
		isc_buffer_putuint8(data, 0);
		isc_buffer_putuint16(data, (isc_uint16_t) e_bytes);
		isc_region_consume(&r, 3);
	}

	if (r.length < e_bytes + mod_bytes)
		DST_RET(ISC_R_NOSPACE);

	BN_bn2bin(rsa->e, r.base);
	isc_region_consume(&r, e_bytes);
	BN_bn2bin(rsa->n, r.base);

	isc_buffer_add(data, e_bytes + mod_bytes);

	ret = ISC_R_SUCCESS;
 err:
#if USE_EVP
	if (rsa != NULL)
		RSA_free(rsa);
#endif
	return (ret);
}

//.........这里部分代码省略.........
#endif

	for (i = 0; i < 8; i++) {
		bufs[i] = isc_mem_get(key->mctx, BN_num_bytes(rsa->n));
		if (bufs[i] == NULL) {
			result = ISC_R_NOMEMORY;
			goto fail;
		}
	}

	i = 0;

	priv.elements[i].tag = TAG_RSA_MODULUS;
	priv.elements[i].length = BN_num_bytes(rsa->n);
	BN_bn2bin(rsa->n, bufs[i]);
	priv.elements[i].data = bufs[i];
	i++;

	priv.elements[i].tag = TAG_RSA_PUBLICEXPONENT;
	priv.elements[i].length = BN_num_bytes(rsa->e);
	BN_bn2bin(rsa->e, bufs[i]);
	priv.elements[i].data = bufs[i];
	i++;

	if (rsa->d != NULL) {
		priv.elements[i].tag = TAG_RSA_PRIVATEEXPONENT;
		priv.elements[i].length = BN_num_bytes(rsa->d);
		BN_bn2bin(rsa->d, bufs[i]);
		priv.elements[i].data = bufs[i];
		i++;
	}

	if (rsa->p != NULL) {
		priv.elements[i].tag = TAG_RSA_PRIME1;
		priv.elements[i].length = BN_num_bytes(rsa->p);
		BN_bn2bin(rsa->p, bufs[i]);
		priv.elements[i].data = bufs[i];
		i++;
	}

	if (rsa->q != NULL) {
		priv.elements[i].tag = TAG_RSA_PRIME2;
		priv.elements[i].length = BN_num_bytes(rsa->q);
		BN_bn2bin(rsa->q, bufs[i]);
		priv.elements[i].data = bufs[i];
		i++;
	}

	if (rsa->dmp1 != NULL) {
		priv.elements[i].tag = TAG_RSA_EXPONENT1;
		priv.elements[i].length = BN_num_bytes(rsa->dmp1);
		BN_bn2bin(rsa->dmp1, bufs[i]);
		priv.elements[i].data = bufs[i];
		i++;
	}

	if (rsa->dmq1 != NULL) {
		priv.elements[i].tag = TAG_RSA_EXPONENT2;
		priv.elements[i].length = BN_num_bytes(rsa->dmq1);
		BN_bn2bin(rsa->dmq1, bufs[i]);
		priv.elements[i].data = bufs[i];
		i++;
	}

	if (rsa->iqmp != NULL) {
		priv.elements[i].tag = TAG_RSA_COEFFICIENT;
		priv.elements[i].length = BN_num_bytes(rsa->iqmp);
		BN_bn2bin(rsa->iqmp, bufs[i]);
		priv.elements[i].data = bufs[i];
		i++;
	}

	if (key->engine != NULL) {
		priv.elements[i].tag = TAG_RSA_ENGINE;
		priv.elements[i].length = strlen(key->engine) + 1;
		priv.elements[i].data = (unsigned char *)key->engine;
		i++;
	}

	if (key->label != NULL) {
		priv.elements[i].tag = TAG_RSA_LABEL;
		priv.elements[i].length = strlen(key->label) + 1;
		priv.elements[i].data = (unsigned char *)key->label;
		i++;
	}


	priv.nelements = i;
	result = dst__privstruct_writefile(key, &priv, directory);
 fail:
#if USE_EVP
	RSA_free(rsa);
#endif
	for (i = 0; i < 8; i++) {
		if (bufs[i] == NULL)
			break;
		isc_mem_put(key->mctx, bufs[i], BN_num_bytes(rsa->n));
	}
	return (result);
}

void
ca_imsg(struct mproc *p, struct imsg *imsg)
{
	RSA			*rsa;
	const void		*from = NULL;
	unsigned char		*to = NULL;
	struct msg		 m;
	const char		*pkiname;
	size_t			 flen, tlen, padding;
	struct pki		*pki;
	int			 ret = 0;
	uint64_t		 id;
	int			 v;

	if (p->proc == PROC_PARENT) {
		switch (imsg->hdr.type) {
		case IMSG_CONF_START:
			return;
		case IMSG_CONF_END:
			ca_init();

			/* Start fulfilling requests */
			mproc_enable(p_pony);
			return;
		}
	}

	if (p->proc == PROC_CONTROL) {
		switch (imsg->hdr.type) {
		case IMSG_CTL_VERBOSE:
			m_msg(&m, imsg);
			m_get_int(&m, &v);
			m_end(&m);
			log_verbose(v);
			return;
		case IMSG_CTL_PROFILE:
			m_msg(&m, imsg);
			m_get_int(&m, &v);
			m_end(&m);
			profiling = v;
			return;
		}
	}

	if (p->proc == PROC_PONY) {
		switch (imsg->hdr.type) {
		case IMSG_CA_PRIVENC:
		case IMSG_CA_PRIVDEC:
			m_msg(&m, imsg);
			m_get_id(&m, &id);
			m_get_string(&m, &pkiname);
			m_get_data(&m, &from, &flen);
			m_get_size(&m, &tlen);
			m_get_size(&m, &padding);
			m_end(&m);

			pki = dict_get(env->sc_pki_dict, pkiname);
			if (pki == NULL || pki->pki_pkey == NULL ||
			    (rsa = EVP_PKEY_get1_RSA(pki->pki_pkey)) == NULL)
				fatalx("ca_imsg: invalid pki");

			if ((to = calloc(1, tlen)) == NULL)
				fatalx("ca_imsg: calloc");

			switch (imsg->hdr.type) {
			case IMSG_CA_PRIVENC:
				ret = RSA_private_encrypt(flen, from, to, rsa,
				    padding);
				break;
			case IMSG_CA_PRIVDEC:
				ret = RSA_private_decrypt(flen, from, to, rsa,
				    padding);
				break;
			}

			m_create(p, imsg->hdr.type, 0, 0, -1);
			m_add_id(p, id);
			m_add_int(p, ret);
			if (ret > 0)
				m_add_data(p, to, (size_t)ret);
			m_close(p);

			free(to);
			RSA_free(rsa);

			return;
		}
	}

	errx(1, "ca_imsg: unexpected %s imsg", imsg_to_str(imsg->hdr.type));
}

//.........这里部分代码省略.........
	    {
		if (ptr != (unsigned char *) NULL)
		  free(ptr);
		DSA_free(kk);
		keynote_errno = ERROR_SYNTAX; /* Could be a memory error */
		return -1;
	    }
	}

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

        if (ptr != (unsigned char *) NULL)
          free(ptr);

        return 0;
    }

    /* X509 Cert */
    if ((dc->dec_algorithm == KEYNOTE_ALGORITHM_X509) &&

static gchar*
generate_response(const gchar *nouce, const gchar *userid,
        const gchar *password, const gchar *publickey, const gchar *aeskey_raw)
{
    gchar  *psdhex = hash_password_v4(userid, password);
    gchar   modulus[257];
    gchar   exponent[7];
    gint    ret, flen;
    BIGNUM *bnn, *bne;
    guchar *out;
    guchar *nonce, *aeskey, *psd, *res;
    gint    nonce_len, aeskey_len, psd_len;
    RSA    *r      = RSA_new();

    memset(modulus, 0, sizeof(modulus));
    memset(exponent, 0, sizeof(exponent));

    memcpy(modulus, publickey, 256);
    memcpy(exponent, publickey + 256, 6);

    nonce = (guchar*)g_malloc0(strlen(nouce) + 1);
    memcpy(nonce, (guchar*)nouce, strlen(nouce));
    nonce_len = strlen(nouce);

    psd = strtohex(psdhex, &psd_len);

    aeskey = strtohex(aeskey_raw, &aeskey_len);

    res = (guchar*)g_malloc0(nonce_len + aeskey_len + psd_len + 1);
    memcpy(res, nonce, nonce_len);
    memcpy(res + nonce_len, psd, psd_len);
    memcpy(res + nonce_len + psd_len, aeskey, aeskey_len);

    bnn = BN_new();
    bne = BN_new();
    BN_hex2bn(&bnn, modulus);
    BN_hex2bn(&bne, exponent);
    r->n = bnn;    r->e = bne;    r->d = NULL;

    RSA_print_fp(stdout, r, 5);
    flen = RSA_size(r);
    out =  (guchar*)g_malloc0(flen);
    hybrid_debug_info("fetion", "start encrypting response");
    ret = RSA_public_encrypt(nonce_len + aeskey_len + psd_len,
            res, out, r, RSA_PKCS1_PADDING);

    if (ret < 0) {
        hybrid_debug_info("fetion", "encrypt response failed!");
        g_free(res);
        g_free(aeskey);
        g_free(psd);
        g_free(nonce);
        return NULL;
    }

    RSA_free(r);
    hybrid_debug_info("fetion", "encrypting reponse success");
    g_free(res);
    g_free(aeskey);
    g_free(psd);
    g_free(nonce);

    return hextostr(out , ret);
}

char *js_private_encrypt(const char *plain_text, const char *private_key_path) {
    RSA *rsa_privateKey = NULL;
    FILE *fp_privateKey;
    int rsa_private_len;
    
    if ((fp_privateKey = fopen(private_key_path, "r")) == NULL) {
        printf("Could not open %s\n", private_key_path);
        return '\0';
    }
    
    if ((rsa_privateKey = PEM_read_RSAPrivateKey(fp_privateKey, NULL, NULL, NULL)) == NULL) {
        fclose(fp_privateKey);
        printf("Error loading RSA Private Key File.");
        return '\0';
    }
    fclose(fp_privateKey);
    
    rsa_private_len = RSA_size(rsa_privateKey);
    printf("RSA private length: %d\n", rsa_private_len);
    
    // 11 bytes is overhead required for encryption
    int chunk_length = rsa_private_len - 11;
    // plain text length
    int plain_char_len = (int)strlen(plain_text);
    // calculate the number of chunks
    int num_of_chunks = (int)(strlen(plain_text) / chunk_length) + 1;
    
    int total_cipher_length = 0;
    
    // the output size is (total number of chunks) x (the key length)
    int encrypted_size = (num_of_chunks * rsa_private_len);
    unsigned char *cipher_data = malloc(encrypted_size + 1);
    
    char *err = NULL;
    for (int i = 0; i < plain_char_len; i += chunk_length) {
        // get the remaining character count from the plain text
        int remaining_char_count = plain_char_len - i;
        
        // this len is the number of characters to encrypt, thus take the minimum between the chunk count & the remaining characters
        // this must less than rsa_private_len - 11
        int len = JSMIN(remaining_char_count, chunk_length);
        unsigned char *plain_chunk = malloc(len + 1);
        // take out chunk of plain text
        memcpy(&plain_chunk[0], &plain_text[i], len);
        
        printf("Plain chunk: %s\n", plain_chunk);
        
        unsigned char *result_chunk = malloc(rsa_private_len + 1);
        
        int result_length = RSA_private_encrypt(len, plain_chunk, result_chunk, rsa_privateKey, RSA_PKCS1_PADDING);
        printf("Encrypted Result chunk: %s\nEncrypted Chunk length: %d\n", result_chunk, result_length);
        
        free(plain_chunk);
        
        if (result_length == -1) {
            ERR_load_CRYPTO_strings();
            fprintf(stderr, "Error %s\n", ERR_error_string(ERR_get_error(), err));
            fprintf(stderr, "Error %s\n", err);
        }
        
        memcpy(&cipher_data[total_cipher_length], &result_chunk[0], result_length);
        
        total_cipher_length += result_length;
        
        free(result_chunk);
    }
    printf("Total cipher length: %d\n", total_cipher_length);
    
    RSA_free(rsa_privateKey);
    size_t total_len = 0;
    char *encrypted = base64_encode(cipher_data, encrypted_size, &total_len);
    printf("Final result: %s\n Final result length: %zu\n", encrypted, total_len);
    
    free(cipher_data);
    
    return encrypted;
}

//.........这里部分代码省略.........
#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
        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);

	rsa = RSA_new();
	if (!rsa)
		goto err;

	if (use_x931)
		{
		BIGNUM *pubexp;
		pubexp = BN_new();
		if (!BN_set_word(pubexp, f4))
			goto err;
		if (!RSA_X931_generate_key_ex(rsa, num, pubexp, &cb))
			goto err;
		BN_free(pubexp);
		}
	else 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);
	}

int
gen_cert (X509 ** cert, EVP_PKEY ** key)
{
  RSA *rsa;
  X509_NAME *subj;
  X509_EXTENSION *ext;
  X509V3_CTX ctx;
  const char *commonName = "localhost";
  char dNSName[128];
  int rc;

  *cert = NULL;
  *key = NULL;

  /* Generate a private key. */
  *key = EVP_PKEY_new ();
  if (*key == NULL) {
#ifdef DEBUG
    fprintf (stderr, "Error generating key.\n");
#endif
    exit (1);
  }

  do {
    rsa = RSA_generate_key (DEFAULT_KEY_BITS, RSA_F4, NULL, NULL);
    if (rsa == NULL) {
#ifdef DEBUG
      fprintf (stderr, "Error generating RSA key.\n");
#endif
      exit (1);
    }
    rc = RSA_check_key (rsa);
  }
  while (rc == 0);
  if (rc == -1) {
#ifdef DEBUG
    fprintf (stderr, "Error generating RSA key.\n");
#endif
    exit (1);
  }
  if (EVP_PKEY_assign_RSA (*key, rsa) == 0) {
    RSA_free (rsa);
#ifdef DEBUG
    fprintf (stderr, "Error with EVP and PKEY.\n");
#endif
    exit (1);
  }

  /* Generate a certificate. */
  *cert = X509_new ();
  if (*cert == NULL) {
#ifdef DEBUG
    fprintf (stderr, "Couldn't generate 509 cert.\n");
#endif
    exit (1);
  }
  if (X509_set_version (*cert, 2) == 0) {	/* Version 3. */
#ifdef DEBUG
    fprintf (stderr, "Couldn't set x509 version.\n");
#endif
    exit (1);
  }

  /* Set the commonName. */
  subj = X509_get_subject_name (*cert);
  if (X509_NAME_add_entry_by_txt (subj, "commonName", MBSTRING_ASC,
				  (unsigned char *) commonName, -1, -1,
				  0) == 0) {
#ifdef DEBUG
    fprintf (stderr, "Couldn't set common name.\n");
#endif
    exit (1);
  }

  /* Set the dNSName. */
  rc = snprintf (dNSName, sizeof (dNSName), "DNS:%s", commonName);
  if (rc < 0 || rc >= sizeof (dNSName)) {
#ifdef DEBUG
    fprintf (stderr, "Unable to set dns name.\n");
#endif
    exit (1);
  }
  X509V3_set_ctx (&ctx, *cert, *cert, NULL, NULL, 0);
  ext = X509V3_EXT_conf (NULL, &ctx, "subjectAltName", dNSName);
  if (ext == NULL) {
#ifdef DEBUG
    fprintf (stderr, "Unable to get subjectaltname.\n");
#endif
    exit (1);
  }
  if (X509_add_ext (*cert, ext, -1) == 0) {
#ifdef DEBUG
    fprintf (stderr, "x509_add_ext error.\n");
#endif
    exit (1);
  }

  /* Set a comment. */
  ext = X509V3_EXT_conf (NULL, &ctx, "nsComment", CERTIFICATE_COMMENT);
  if (ext == NULL) {
//.........这里部分代码省略.........

bool confupdate_h(connection_t *c) {
	char updname[MAX_STRING_SIZE];
	char rawconf[MAX_STRING_SIZE], b64conf[MAX_STRING_SIZE];
	char rawdgst[MAX_STRING_SIZE], b64dgst[MAX_STRING_SIZE];
	node_t *n;
	char *fname, *tname;
	FILE *fp;
	int x;
	size_t slen, dlen, rlen;
	RSA *updkey;

	/* Guard ourselves against updates */
	if (ignorenetupdates() || ignoreconfupdates()) return true;

	if (sscanf(c->buffer, "%*d " MAX_STRING " " MAX_STRING " %zd %zd " MAX_STRING,
		updname, b64conf, &slen, &dlen, b64dgst) != 5) {
		logger(LOG_ERR, "Got bad %s from %s (%s)", "CONFUPDATE", c->name, c->hostname);
		return false;
	}

	if (dontverifyupdatepermission()) goto _next;
	if(!getconf_bool_node_offline(updname, "ConfFileMaster")) {
		ifdebug(PROTOCOL) logger(LOG_WARNING,
		"Ignoring config update request originating from %s [which came from %s (%s)]",
		updname, c->name, c->hostname);

		return true;
	}

_next:	if (!isvalidfname(updname)) {
		logger(LOG_ERR, "Got bogus updater name \"%s\" from %s (%s) (from: %s)",
			updname, c->name, c->hostname, updname);
		return false;
	}

	if (slen >= MAX_STRING_SIZE || dlen >= MAX_STRING_SIZE) {
		logger(LOG_ERR,
		"CONFUPDATE string sizes are bigger than buffer can fit (%zd, %zd)",
		slen, dlen);

		return false;
	}

	if (dontverifyupdatesignature()) goto _out;
	if (!read_rsa_public_key_offline(updname, &updkey)) {
		logger(LOG_ERR, "Could not find public key for %s", updname);
		return true;
	}
	base64_decode(b64dgst, rawdgst, sizeof(rawdgst)-1);
	snprintf(rawconf, sizeof(rawconf), "%s %s %zd %zd", updname, b64conf, slen, dlen);
	rlen = strlen(rawconf);
	if (!EVP_verify(updkey, rawdgst, dlen, rawconf, rlen)) {
		logger(LOG_WARNING,
		"Ignoring config update request with bad signature"
		" from %s [which came from %s (%s)]",
		updname, c->name, c->hostname);

		RSA_free(updkey);
		return true;
	}
	RSA_free(updkey);


_out:	if (!strcmp(updname, myself->name)) return true;

	if (!dontforwardconfupdates()) {
		exceptmasters = true;
		forward_request(c);
	}

	if (!strcmp(b64conf, "START")) {
		run_script("confupdate-before");
		return true;
	}

	else if (!strcmp(b64conf, "END")) {
		run_script("confupdate-after");

		schedulereload();

		return true;
	}

	xasprintf(&fname, "%s/tinc.conf", confbase);
	fp = fopen(fname, "w");
	if (!fp) {
		logger(LOG_ERR, "Could not update %s: %s", fname, strerror(errno));
		free(fname);
		return true;
	}

	/* Save variables which are sensitive */
	for (x = 0; confvarstopreserve[x]; x++) {
		if(get_config_string(lookup_config(config_tree,
			confvarstopreserve[x]), &tname)) {
				fprintf(fp, "%s = %s\n", confvarstopreserve[x], tname);
			free(tname);
		}
	}

//.........这里部分代码省略.........

static isc_boolean_t
opensslrsa_compare(const dst_key_t *key1, const dst_key_t *key2) {
	int status;
	RSA *rsa1 = NULL, *rsa2 = NULL;
#if USE_EVP
	EVP_PKEY *pkey1, *pkey2;
#endif

#if USE_EVP
	pkey1 = key1->keydata.pkey;
	pkey2 = key2->keydata.pkey;
	/*
	 * The pkey reference will keep these around after
	 * the RSA_free() call.
	 */
	if (pkey1 != NULL) {
		rsa1 = EVP_PKEY_get1_RSA(pkey1);
		RSA_free(rsa1);
	}
	if (pkey2 != NULL) {
		rsa2 = EVP_PKEY_get1_RSA(pkey2);
		RSA_free(rsa2);
	}
#else
	rsa1 = key1->keydata.rsa;
	rsa2 = key2->keydata.rsa;
#endif

	if (rsa1 == NULL && rsa2 == NULL)
		return (ISC_TRUE);
	else if (rsa1 == NULL || rsa2 == NULL)
		return (ISC_FALSE);

	status = BN_cmp(rsa1->n, rsa2->n) ||
		 BN_cmp(rsa1->e, rsa2->e);

	if (status != 0)
		return (ISC_FALSE);

#if USE_EVP
	if ((rsa1->flags & RSA_FLAG_EXT_PKEY) != 0 ||
	    (rsa2->flags & RSA_FLAG_EXT_PKEY) != 0) {
		if ((rsa1->flags & RSA_FLAG_EXT_PKEY) == 0 ||
		    (rsa2->flags & RSA_FLAG_EXT_PKEY) == 0)
			return (ISC_FALSE);
		/*
		 * Can't compare private parameters, BTW does it make sense?
		 */
		return (ISC_TRUE);
	}
#endif

	if (rsa1->d != NULL || rsa2->d != NULL) {
		if (rsa1->d == NULL || rsa2->d == NULL)
			return (ISC_FALSE);
		status = BN_cmp(rsa1->d, rsa2->d) ||
			 BN_cmp(rsa1->p, rsa2->p) ||
			 BN_cmp(rsa1->q, rsa2->q);

		if (status != 0)
			return (ISC_FALSE);
	}
	return (ISC_TRUE);
}