internal/cveclient/cveclient.go - vulndb - Git at Google

 // Copyright 2022 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.

 // Package cveclient implements a client for interacting with MITRE CVE
 // Services API as described at https://cveawg.mitre.org/api-docs/openapi.json.
 package cveclient

 import (
 	"bytes"
 	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 	"net/url"
 	"strconv"
 	"strings"
 	"time"

 	"golang.org/x/vulndb/internal/cveschema5"
 )

 const (
 	// ProdEndpoint is the production endpoint
 	ProdEndpoint = "https://cveawg.mitre.org"
 	// TestEndpoint is the test endpoint
 	TestEndpoint = "https://cveawg-test.mitre.org"
 	// DevEndpoint is the dev endpoint
 	DevEndpoint = "https://cveawg-dev.mitre.org"

 	// WebURL is the URL to view production CVE records on the web.
 	WebURL = "https://www.cve.org"
 	// TestWebURL is the URL to view test CVE records on the web.
 	TestWebURL = "https://test.cve.org"
 )

 // Client is a MITRE CVE Services API client.
 type Client struct {
 	Config
 	c *http.Client
 }

 // GetWebURL returns the URL that can be used to view a published
 // CVE record on the web.
 func (c *Client) GetWebURL(cveID string) string {
 	baseURL := WebURL
 	if c.Config.Endpoint == TestEndpoint {
 		baseURL = TestWebURL
 	}
 	return fmt.Sprintf("%s/CVERecord?id=%s", baseURL, cveID)
 }

 // Config contains client configuration data.
 type Config struct {
 	// Endpoint is the endpoint to access when making API calls. Required.
 	Endpoint string
 	// Org is the shortname for the organization that is authenticated when
 	// making API calls. Required.
 	Org string
 	// Key is the user's API key. Required.
 	Key string
 	// User is the username for the account that is making API calls. Required.
 	User string
 }

 // New returns an initialized client configured via cfg.
 func New(cfg Config) *Client {
 	return &Client{cfg, http.DefaultClient}
 }

 // AssignedCVE contains information about an assigned CVE.
 type AssignedCVE struct {
 	ID          string           `json:"cve_id"`
 	Year        string           `json:"cve_year"`
 	State       cveschema5.State `json:"state"`
 	CNA         string           `json:"owning_cna"`
 	Reserved    time.Time        `json:"reserved"`
 	RequestedBy RequestedBy      `json:"requested_by"`
 }

 // RequestedBy indicates the requesting user and organization for a CVE.
 type RequestedBy struct {
 	CNA  string `json:"cna"`
 	User string `json:"user"`
 }

 func (c AssignedCVE) String() string {
 	return fmt.Sprintf("%s: state=%s, cna=%s, requester=%s", c.ID, c.State, c.CNA, c.RequestedBy.User)
 }

 // AssignedCVEList is a list of AssignedCVEs.
 type AssignedCVEList []AssignedCVE

 // ShortString outputs a formatted string of newline-separated CVE IDs.
 func (cs AssignedCVEList) ShortString() string {
 	strs := []string{}
 	for _, c := range cs {
 		strs = append(strs, c.ID)
 	}
 	return strings.Join(strs, "\n")
 }

 // String outputs a formatted string of newline-separated CVE data.
 func (cs AssignedCVEList) String() string {
 	strs := []string{}
 	for _, c := range cs {
 		strs = append(strs, c.String())
 	}
 	return strings.Join(strs, "\n")
 }

 // ReserveOptions contains the configuration options for reserving new
 // CVE IDs.
 type ReserveOptions struct {
 	// NumIDs is the the number of CVE IDs to reserve. Required.
 	NumIDs int
 	// Year is the CVE ID year for new IDs, indicating the year the
 	// vulnerability was discovered. Required.
 	Year int
 	// Mode indicates whether the block of CVEs should be in sequence.
 	// Relevant only if NumIDs > 1.
 	Mode RequestType
 }

 // RequestType is the type of CVE ID reserve request.
 type RequestType string

 const (
 	// SequentialRequest requests CVE IDs be reserved in a sequential fashion.
 	SequentialRequest RequestType = "sequential"
 	// NonsequentialRequest requests CVE IDs be reserved in a nonsequential fashion.
 	NonsequentialRequest RequestType = "nonsequential"
 )

 func (o *ReserveOptions) getURLParams(org string) url.Values {
 	params := url.Values{}
 	params.Set("amount", fmt.Sprint(o.NumIDs))
 	if o.Year != 0 {
 		params.Set("cve_year", strconv.Itoa(o.Year))
 	}
 	params.Set("short_name", org)
 	if o.NumIDs > 1 {
 		params.Set("batch_type", string(o.Mode))
 	}
 	return params
 }

 func (c *Client) createReserveIDsRequest(opts ReserveOptions) (*http.Request, error) {
 	req, err := c.createRequest(http.MethodPost,
 		c.getURL(cveIDTarget), nil)
 	if err != nil {
 		return nil, err
 	}
 	req.URL.RawQuery = opts.getURLParams(c.Org).Encode()
 	return req, err
 }

 type reserveIDsResponse struct {
 	CVEs AssignedCVEList `json:"cve_ids"`
 }

 // ReserveIDs sends a request to the CVE API to reserve a block of CVE IDs.
 // Returns a list of the reserved CVE IDs and their associated data.
 // There may be fewer IDs than requested if, for example, the organization's
 // quota is reached.
 func (c *Client) ReserveIDs(opts ReserveOptions) (AssignedCVEList, error) {
 	req, err := c.createReserveIDsRequest(opts)
 	if err != nil {
 		return nil, err
 	}
 	var assigned reserveIDsResponse
 	checkStatus := func(s int) bool {
 		return s == http.StatusOK || s == http.StatusPartialContent
 	}
 	err = c.sendRequest(req, checkStatus, &assigned)
 	if err != nil {
 		return nil, err
 	}
 	return assigned.CVEs, nil
 }

 // Quota contains information about an organizations reservation quota.
 type Quota struct {
 	Quota     int `json:"id_quota"`
 	Reserved  int `json:"total_reserved"`
 	Available int `json:"available"`
 }

 // RetrieveQuota queries the API for the organizations reservation quota.
 func (c *Client) RetrieveQuota() (q *Quota, err error) {
 	err = c.queryAPI(http.MethodGet, c.getURL(orgTarget, c.Org, quotaTarget), nil, &q)
 	return
 }

 // RetrieveID requests information about an assigned CVE ID.
 func (c *Client) RetrieveID(id string) (cve *AssignedCVE, err error) {
 	err = c.queryAPI(http.MethodGet, c.getURL(cveIDTarget, id), nil, &cve)
 	return
 }

 // RetrieveRecord requests a CVE record.
 func (c *Client) RetrieveRecord(id string) (cve *cveschema5.CVERecord, err error) {
 	err = c.queryAPI(http.MethodGet, c.getURL(cveTarget, id), nil, &cve)
 	return
 }

 func (c *Client) getCVERecordEndpoint(cveID string) string {
 	return c.getURL(cveTarget, cveID, cnaTarget)
 }

 type recordRequestBody struct {
 	CNAContainer cveschema5.CNAPublishedContainer `json:"cnaContainer"`
 }
 type createResponse struct {
 	Created cveschema5.CVERecord `json:"created"`
 }

 func (c *Client) CreateRecord(id string, record *cveschema5.Containers) (*cveschema5.CVERecord, error) {
 	requestBody := recordRequestBody{
 		CNAContainer: record.CNAContainer,
 	}
 	var response createResponse
 	err := c.queryAPI(http.MethodPost, c.getCVERecordEndpoint(id), requestBody, &response)
 	if err != nil {
 		return nil, err
 	}
 	return &response.Created, nil
 }

 type updateResponse struct {
 	Updated cveschema5.CVERecord `json:"updated"`
 }

 func (c *Client) UpdateRecord(id string, record *cveschema5.Containers) (*cveschema5.CVERecord, error) {
 	requestBody := recordRequestBody{
 		CNAContainer: record.CNAContainer,
 	}
 	var response updateResponse
 	err := c.queryAPI(http.MethodPut, c.getCVERecordEndpoint(id), requestBody, &response)
 	if err != nil {
 		return nil, err
 	}
 	return &response.Updated, nil
 }

 type Org struct {
 	Name      string `json:"name"`
 	ShortName string `json:"short_name"`
 	UUID      string `json:"UUID"`
 }

 // RetrieveOrg requests information about an organization.
 func (c *Client) RetrieveOrg() (org *Org, err error) {
 	err = c.queryAPI(http.MethodGet, c.getURL(orgTarget, c.Org), nil, &org)
 	return
 }

 // ListOptions contains filters to be used when requesting a list of
 // assigned CVEs.
 type ListOptions struct {
 	State          string
 	Year           int
 	ReservedBefore *time.Time
 	ReservedAfter  *time.Time
 	ModifiedBefore *time.Time
 	ModifiedAfter  *time.Time
 }

 func (o ListOptions) String() string {
 	var s []string
 	if o.State != "" {
 		s = append(s, fmt.Sprintf("state=%s", o.State))
 	}
 	if o.Year != 0 {
 		s = append(s, fmt.Sprintf("year=%d", o.Year))
 	}
 	if o.ReservedBefore != nil {
 		s = append(s, fmt.Sprintf("reserved_before=%s", o.ReservedBefore.Format(time.RFC3339)))
 	}
 	if o.ReservedAfter != nil {
 		s = append(s, fmt.Sprintf("reserved_after=%s", o.ReservedAfter.Format(time.RFC3339)))
 	}
 	if o.ModifiedBefore != nil {
 		s = append(s, fmt.Sprintf("modified_before=%s", o.ModifiedBefore.Format(time.RFC3339)))
 	}
 	if o.ModifiedAfter != nil {
 		s = append(s, fmt.Sprintf("modified_after=%s", o.ModifiedAfter.Format(time.RFC3339)))
 	}
 	return strings.Join(s, ", ")
 }

 func (o *ListOptions) getURLParams() url.Values {
 	params := url.Values{}
 	if o == nil {
 		return params
 	}
 	if o.State != "" {
 		params.Set("state", o.State)
 	}
 	if o.Year != 0 {
 		params.Set("cve_id_year", strconv.Itoa(o.Year))
 	}
 	if o.ReservedBefore != nil {
 		params.Set("time_reserved.lt", o.ReservedBefore.Format(time.RFC3339))
 	}
 	if o.ReservedAfter != nil {
 		params.Set("time_reserved.gt", o.ReservedAfter.Format(time.RFC3339))
 	}
 	if o.ModifiedBefore != nil {
 		params.Set("time_modified.lt", o.ModifiedBefore.Format(time.RFC3339))
 	}
 	if o.ModifiedAfter != nil {
 		params.Set("time_modified.gt", o.ModifiedAfter.Format(time.RFC3339))
 	}
 	return params
 }

 type listOrgCVEsResponse struct {
 	CurrentPage int             `json:"currentPage"`
 	NextPage    int             `json:"nextPage"`
 	CVEs        AssignedCVEList `json:"cve_ids"`
 }

 func (c Client) createListOrgCVEsRequest(opts *ListOptions, page int) (req *http.Request, err error) {
 	req, err = c.createRequest(http.MethodGet, c.getURL(cveIDTarget), nil)
 	if err != nil {
 		return nil, err
 	}
 	params := opts.getURLParams()
 	if page > 0 {
 		params.Set("page", fmt.Sprint(page))
 	}
 	req.URL.RawQuery = params.Encode()
 	return
 }

 // ListOrgCVEs requests information about the CVEs the organization has been
 // assigned. This list can be filtered by setting the fields in opts.
 func (c *Client) ListOrgCVEs(opts *ListOptions) (AssignedCVEList, error) {
 	var cves []AssignedCVE
 	page := 0
 	for {
 		req, err := c.createListOrgCVEsRequest(opts, page)
 		if err != nil {
 			return nil, err
 		}
 		var result listOrgCVEsResponse
 		err = c.sendRequest(req, nil, &result)
 		if err != nil {
 			return nil, err
 		}
 		cves = append(cves, result.CVEs...)
 		if result.NextPage <= result.CurrentPage {
 			break
 		}
 		page = result.NextPage
 	}
 	return cves, nil
 }

 func (c *Client) queryAPI(method, url string, requestBody any, response any) error {
 	req, err := c.createRequest(method, url, requestBody)
 	if err != nil {
 		return err
 	}
 	err = c.sendRequest(req, nil, response)
 	if err != nil {
 		return err
 	}
 	return nil
 }

 var (
 	headerApiUser = "CVE-API-USER"
 	headerApiOrg  = "CVE-API-ORG"
 	headerApiKey  = "CVE-API-KEY"
 )

 // createRequest creates a new HTTP request and sets the header fields.
 func (c *Client) createRequest(method, url string, body any) (*http.Request, error) {
 	var r io.Reader
 	if body != nil {
 		b, err := json.Marshal(body)
 		if err != nil {
 			return nil, err
 		}
 		r = bytes.NewReader(b)
 	}
 	req, err := http.NewRequest(method, url, r)
 	if err != nil {
 		return nil, err
 	}
 	req.Header.Set(headerApiUser, c.User)
 	req.Header.Set(headerApiOrg, c.Org)
 	req.Header.Set(headerApiKey, c.Key)
 	req.Header.Set("Content-Type", "application/json")
 	return req, nil
 }

 // sendRequest sends an HTTP request, checks the returned status via
 // checkStatus, and attempts to unmarshal the response into result.
 // if checkStatus is nil, checks for http.StatusOK.
 func (c *Client) sendRequest(req *http.Request, checkStatus func(int) bool, result any) (err error) {
 	resp, err := c.c.Do(req)
 	if err != nil {
 		return fmt.Errorf("could not send HTTP request: %v", err)
 	}
 	defer resp.Body.Close()
 	if checkStatus == nil {
 		checkStatus = func(s int) bool {
 			return s == http.StatusOK
 		}
 	}
 	if !checkStatus(resp.StatusCode) {
 		return fmt.Errorf("HTTP request %s %q returned error: %v", req.Method, req.URL, extractError(resp))
 	}
 	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return err
 	}
 	if err := json.Unmarshal(body, result); err != nil {
 		return err
 	}
 	return nil
 }

 var (
 	cveTarget   = "cve"
 	cveIDTarget = "cve-id"
 	orgTarget   = "org"
 	quotaTarget = "id_quota"
 	cnaTarget   = "cna"
 )

 func (c *Client) getURL(targets ...string) string {
 	return fmt.Sprintf("%s/api/%s", c.Endpoint, strings.Join(targets, "/"))
 }

 type apiError struct {
 	Error   string         `json:"error"`
 	Message string         `json:"message"`
 	Detail  apiErrorDetail `json:"details"`
 }

 type apiErrorDetail struct {
 	Errors []apiErrorInner `json:"errors"`
 }

 type apiErrorInner struct {
 	InstancePath string `json:"instancePath"`
 	Message      string `json:"message"`
 }

 // extractError extracts additional error messages from the HTTP response
 // if available, and wraps them into a single error.
 func extractError(resp *http.Response) error {
 	errMsg := resp.Status
 	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return fmt.Errorf("%s: could not read error data: %s", errMsg, err)
 	}
 	var apiErr apiError
 	if err := json.Unmarshal(body, &apiErr); err != nil {
 		return fmt.Errorf("%s: could not unmarshal error: %s", errMsg, err)
 	}

 	// Append the error and message text if they add extra information
 	// beyond the HTTP status text.
 	statusText := strings.ToLower(http.StatusText(resp.StatusCode))
 	for _, errText := range []string{apiErr.Error, apiErr.Message} {
 		if errText != "" && strings.ToLower(errText) != statusText {
 			errMsg = fmt.Sprintf("%s: %s", errMsg, errText)
 		}
 	}

 	for _, detail := range apiErr.Detail.Errors {
 		errMsg = fmt.Sprintf("%s\n  %s: %s", errMsg, detail.InstancePath, detail.Message)
 	}

 	return fmt.Errorf(errMsg)
 }
	// Copyright 2022 The Go Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style
	// license that can be found in the LICENSE file.

	// Package cveclient implements a client for interacting with MITRE CVE
	// Services API as described at https://cveawg.mitre.org/api-docs/openapi.json.
	package cveclient

	import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"net/url"
	"strconv"
	"strings"
	"time"

	"golang.org/x/vulndb/internal/cveschema5"
	)

	const (
	// ProdEndpoint is the production endpoint
	ProdEndpoint = "https://cveawg.mitre.org"
	// TestEndpoint is the test endpoint
	TestEndpoint = "https://cveawg-test.mitre.org"
	// DevEndpoint is the dev endpoint
	DevEndpoint = "https://cveawg-dev.mitre.org"

	// WebURL is the URL to view production CVE records on the web.
	WebURL = "https://www.cve.org"
	// TestWebURL is the URL to view test CVE records on the web.
	TestWebURL = "https://test.cve.org"
	)

	// Client is a MITRE CVE Services API client.
	type Client struct {
	Config
	c *http.Client
	}

	// GetWebURL returns the URL that can be used to view a published
	// CVE record on the web.
	func (c *Client) GetWebURL(cveID string) string {
	baseURL := WebURL
	if c.Config.Endpoint == TestEndpoint {
	baseURL = TestWebURL
	}
	return fmt.Sprintf("%s/CVERecord?id=%s", baseURL, cveID)
	}

	// Config contains client configuration data.
	type Config struct {
	// Endpoint is the endpoint to access when making API calls. Required.
	Endpoint string
	// Org is the shortname for the organization that is authenticated when
	// making API calls. Required.
	Org string
	// Key is the user's API key. Required.
	Key string
	// User is the username for the account that is making API calls. Required.
	User string
	}

	// New returns an initialized client configured via cfg.
	func New(cfg Config) *Client {
	return &Client{cfg, http.DefaultClient}
	}

	// AssignedCVE contains information about an assigned CVE.
	type AssignedCVE struct {
	ID string `json:"cve_id"`
	Year string `json:"cve_year"`
	State cveschema5.State `json:"state"`
	CNA string `json:"owning_cna"`
	Reserved time.Time `json:"reserved"`
	RequestedBy RequestedBy `json:"requested_by"`
	}

	// RequestedBy indicates the requesting user and organization for a CVE.
	type RequestedBy struct {
	CNA string `json:"cna"`
	User string `json:"user"`
	}

	func (c AssignedCVE) String() string {
	return fmt.Sprintf("%s: state=%s, cna=%s, requester=%s", c.ID, c.State, c.CNA, c.RequestedBy.User)
	}

	// AssignedCVEList is a list of AssignedCVEs.
	type AssignedCVEList []AssignedCVE

	// ShortString outputs a formatted string of newline-separated CVE IDs.
	func (cs AssignedCVEList) ShortString() string {
	strs := []string{}
	for _, c := range cs {
	strs = append(strs, c.ID)
	}
	return strings.Join(strs, "\n")
	}

	// String outputs a formatted string of newline-separated CVE data.
	func (cs AssignedCVEList) String() string {
	strs := []string{}
	for _, c := range cs {
	strs = append(strs, c.String())
	}
	return strings.Join(strs, "\n")
	}

	// ReserveOptions contains the configuration options for reserving new
	// CVE IDs.
	type ReserveOptions struct {
	// NumIDs is the the number of CVE IDs to reserve. Required.
	NumIDs int
	// Year is the CVE ID year for new IDs, indicating the year the
	// vulnerability was discovered. Required.
	Year int
	// Mode indicates whether the block of CVEs should be in sequence.
	// Relevant only if NumIDs > 1.
	Mode RequestType
	}

	// RequestType is the type of CVE ID reserve request.
	type RequestType string

	const (
	// SequentialRequest requests CVE IDs be reserved in a sequential fashion.
	SequentialRequest RequestType = "sequential"
	// NonsequentialRequest requests CVE IDs be reserved in a nonsequential fashion.
	NonsequentialRequest RequestType = "nonsequential"
	)

	func (o *ReserveOptions) getURLParams(org string) url.Values {
	params := url.Values{}
	params.Set("amount", fmt.Sprint(o.NumIDs))
	if o.Year != 0 {
	params.Set("cve_year", strconv.Itoa(o.Year))
	}
	params.Set("short_name", org)
	if o.NumIDs > 1 {
	params.Set("batch_type", string(o.Mode))
	}
	return params
	}

	func (c Client) createReserveIDsRequest(opts ReserveOptions) (http.Request, error) {
	req, err := c.createRequest(http.MethodPost,
	c.getURL(cveIDTarget), nil)
	if err != nil {
	return nil, err
	}
	req.URL.RawQuery = opts.getURLParams(c.Org).Encode()
	return req, err
	}

	type reserveIDsResponse struct {
	CVEs AssignedCVEList `json:"cve_ids"`
	}

	// ReserveIDs sends a request to the CVE API to reserve a block of CVE IDs.
	// Returns a list of the reserved CVE IDs and their associated data.
	// There may be fewer IDs than requested if, for example, the organization's
	// quota is reached.
	func (c *Client) ReserveIDs(opts ReserveOptions) (AssignedCVEList, error) {
	req, err := c.createReserveIDsRequest(opts)
	if err != nil {
	return nil, err
	}
	var assigned reserveIDsResponse
	checkStatus := func(s int) bool {
	return s == http.StatusOK \|\| s == http.StatusPartialContent
	}
	err = c.sendRequest(req, checkStatus, &assigned)
	if err != nil {
	return nil, err
	}
	return assigned.CVEs, nil
	}

	// Quota contains information about an organizations reservation quota.
	type Quota struct {
	Quota int `json:"id_quota"`
	Reserved int `json:"total_reserved"`
	Available int `json:"available"`
	}

	// RetrieveQuota queries the API for the organizations reservation quota.
	func (c Client) RetrieveQuota() (q Quota, err error) {
	err = c.queryAPI(http.MethodGet, c.getURL(orgTarget, c.Org, quotaTarget), nil, &q)
	return
	}

	// RetrieveID requests information about an assigned CVE ID.
	func (c Client) RetrieveID(id string) (cve AssignedCVE, err error) {
	err = c.queryAPI(http.MethodGet, c.getURL(cveIDTarget, id), nil, &cve)
	return
	}

	// RetrieveRecord requests a CVE record.
	func (c Client) RetrieveRecord(id string) (cve cveschema5.CVERecord, err error) {
	err = c.queryAPI(http.MethodGet, c.getURL(cveTarget, id), nil, &cve)
	return
	}

	func (c *Client) getCVERecordEndpoint(cveID string) string {
	return c.getURL(cveTarget, cveID, cnaTarget)
	}

	type recordRequestBody struct {
	CNAContainer cveschema5.CNAPublishedContainer `json:"cnaContainer"`
	}
	type createResponse struct {
	Created cveschema5.CVERecord `json:"created"`
	}

	func (c Client) CreateRecord(id string, record cveschema5.Containers) (*cveschema5.CVERecord, error) {
	requestBody := recordRequestBody{
	CNAContainer: record.CNAContainer,
	}
	var response createResponse
	err := c.queryAPI(http.MethodPost, c.getCVERecordEndpoint(id), requestBody, &response)
	if err != nil {
	return nil, err
	}
	return &response.Created, nil
	}

	type updateResponse struct {
	Updated cveschema5.CVERecord `json:"updated"`
	}

	func (c Client) UpdateRecord(id string, record cveschema5.Containers) (*cveschema5.CVERecord, error) {
	requestBody := recordRequestBody{
	CNAContainer: record.CNAContainer,
	}
	var response updateResponse
	err := c.queryAPI(http.MethodPut, c.getCVERecordEndpoint(id), requestBody, &response)
	if err != nil {
	return nil, err
	}
	return &response.Updated, nil
	}

	type Org struct {
	Name string `json:"name"`
	ShortName string `json:"short_name"`
	UUID string `json:"UUID"`
	}

	// RetrieveOrg requests information about an organization.
	func (c Client) RetrieveOrg() (org Org, err error) {
	err = c.queryAPI(http.MethodGet, c.getURL(orgTarget, c.Org), nil, &org)
	return
	}

	// ListOptions contains filters to be used when requesting a list of
	// assigned CVEs.
	type ListOptions struct {
	State string
	Year int
	ReservedBefore *time.Time
	ReservedAfter *time.Time
	ModifiedBefore *time.Time
	ModifiedAfter *time.Time
	}

	func (o ListOptions) String() string {
	var s []string
	if o.State != "" {
	s = append(s, fmt.Sprintf("state=%s", o.State))
	}
	if o.Year != 0 {
	s = append(s, fmt.Sprintf("year=%d", o.Year))
	}
	if o.ReservedBefore != nil {
	s = append(s, fmt.Sprintf("reserved_before=%s", o.ReservedBefore.Format(time.RFC3339)))
	}
	if o.ReservedAfter != nil {
	s = append(s, fmt.Sprintf("reserved_after=%s", o.ReservedAfter.Format(time.RFC3339)))
	}
	if o.ModifiedBefore != nil {
	s = append(s, fmt.Sprintf("modified_before=%s", o.ModifiedBefore.Format(time.RFC3339)))
	}
	if o.ModifiedAfter != nil {
	s = append(s, fmt.Sprintf("modified_after=%s", o.ModifiedAfter.Format(time.RFC3339)))
	}
	return strings.Join(s, ", ")
	}

	func (o *ListOptions) getURLParams() url.Values {
	params := url.Values{}
	if o == nil {
	return params
	}
	if o.State != "" {
	params.Set("state", o.State)
	}
	if o.Year != 0 {
	params.Set("cve_id_year", strconv.Itoa(o.Year))
	}
	if o.ReservedBefore != nil {
	params.Set("time_reserved.lt", o.ReservedBefore.Format(time.RFC3339))
	}
	if o.ReservedAfter != nil {
	params.Set("time_reserved.gt", o.ReservedAfter.Format(time.RFC3339))
	}
	if o.ModifiedBefore != nil {
	params.Set("time_modified.lt", o.ModifiedBefore.Format(time.RFC3339))
	}
	if o.ModifiedAfter != nil {
	params.Set("time_modified.gt", o.ModifiedAfter.Format(time.RFC3339))
	}
	return params
	}

	type listOrgCVEsResponse struct {
	CurrentPage int `json:"currentPage"`
	NextPage int `json:"nextPage"`
	CVEs AssignedCVEList `json:"cve_ids"`
	}

	func (c Client) createListOrgCVEsRequest(opts ListOptions, page int) (req http.Request, err error) {
	req, err = c.createRequest(http.MethodGet, c.getURL(cveIDTarget), nil)
	if err != nil {
	return nil, err
	}
	params := opts.getURLParams()
	if page > 0 {
	params.Set("page", fmt.Sprint(page))
	}
	req.URL.RawQuery = params.Encode()
	return
	}

	// ListOrgCVEs requests information about the CVEs the organization has been
	// assigned. This list can be filtered by setting the fields in opts.
	func (c Client) ListOrgCVEs(opts ListOptions) (AssignedCVEList, error) {
	var cves []AssignedCVE
	page := 0
	for {
	req, err := c.createListOrgCVEsRequest(opts, page)
	if err != nil {
	return nil, err
	}
	var result listOrgCVEsResponse
	err = c.sendRequest(req, nil, &result)
	if err != nil {
	return nil, err
	}
	cves = append(cves, result.CVEs...)
	if result.NextPage <= result.CurrentPage {
	break
	}
	page = result.NextPage
	}
	return cves, nil
	}

	func (c *Client) queryAPI(method, url string, requestBody any, response any) error {
	req, err := c.createRequest(method, url, requestBody)
	if err != nil {
	return err
	}
	err = c.sendRequest(req, nil, response)
	if err != nil {
	return err
	}
	return nil
	}

	var (
	headerApiUser = "CVE-API-USER"
	headerApiOrg = "CVE-API-ORG"
	headerApiKey = "CVE-API-KEY"
	)

	// createRequest creates a new HTTP request and sets the header fields.
	func (c Client) createRequest(method, url string, body any) (http.Request, error) {
	var r io.Reader
	if body != nil {
	b, err := json.Marshal(body)
	if err != nil {
	return nil, err
	}
	r = bytes.NewReader(b)
	}
	req, err := http.NewRequest(method, url, r)
	if err != nil {
	return nil, err
	}
	req.Header.Set(headerApiUser, c.User)
	req.Header.Set(headerApiOrg, c.Org)
	req.Header.Set(headerApiKey, c.Key)
	req.Header.Set("Content-Type", "application/json")
	return req, nil
	}

	// sendRequest sends an HTTP request, checks the returned status via
	// checkStatus, and attempts to unmarshal the response into result.
	// if checkStatus is nil, checks for http.StatusOK.
	func (c Client) sendRequest(req http.Request, checkStatus func(int) bool, result any) (err error) {
	resp, err := c.c.Do(req)
	if err != nil {
	return fmt.Errorf("could not send HTTP request: %v", err)
	}
	defer resp.Body.Close()
	if checkStatus == nil {
	checkStatus = func(s int) bool {
	return s == http.StatusOK
	}
	}
	if !checkStatus(resp.StatusCode) {
	return fmt.Errorf("HTTP request %s %q returned error: %v", req.Method, req.URL, extractError(resp))
	}
	body, err := io.ReadAll(resp.Body)
	if err != nil {
	return err
	}
	if err := json.Unmarshal(body, result); err != nil {
	return err
	}
	return nil
	}

	var (
	cveTarget = "cve"
	cveIDTarget = "cve-id"
	orgTarget = "org"
	quotaTarget = "id_quota"
	cnaTarget = "cna"
	)

	func (c *Client) getURL(targets ...string) string {
	return fmt.Sprintf("%s/api/%s", c.Endpoint, strings.Join(targets, "/"))
	}

	type apiError struct {
	Error string `json:"error"`
	Message string `json:"message"`
	Detail apiErrorDetail `json:"details"`
	}

	type apiErrorDetail struct {
	Errors []apiErrorInner `json:"errors"`
	}

	type apiErrorInner struct {
	InstancePath string `json:"instancePath"`
	Message string `json:"message"`
	}

	// extractError extracts additional error messages from the HTTP response
	// if available, and wraps them into a single error.
	func extractError(resp *http.Response) error {
	errMsg := resp.Status
	body, err := io.ReadAll(resp.Body)
	if err != nil {
	return fmt.Errorf("%s: could not read error data: %s", errMsg, err)
	}
	var apiErr apiError
	if err := json.Unmarshal(body, &apiErr); err != nil {
	return fmt.Errorf("%s: could not unmarshal error: %s", errMsg, err)
	}

	// Append the error and message text if they add extra information
	// beyond the HTTP status text.
	statusText := strings.ToLower(http.StatusText(resp.StatusCode))
	for _, errText := range []string{apiErr.Error, apiErr.Message} {
	if errText != "" && strings.ToLower(errText) != statusText {
	errMsg = fmt.Sprintf("%s: %s", errMsg, errText)
	}
	}

	for _, detail := range apiErr.Detail.Errors {
	errMsg = fmt.Sprintf("%s\n %s: %s", errMsg, detail.InstancePath, detail.Message)
	}

	return fmt.Errorf(errMsg)
	}