Add Chef package registry (#22554)

This PR implements a [Chef registry](https://chef.io/) to manage
cookbooks. This package type was a bit complicated because Chef uses RSA
signed requests as authentication with the registry.


![grafik](https://user-images.githubusercontent.com/1666336/213747995-46819fd8-c3d6-45a2-afd4-a4c3c8505a4a.png)


![grafik](https://user-images.githubusercontent.com/1666336/213748145-d01c9e81-d4dd-41e3-a3cc-8241862c3166.png)

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

routers/api/packages/api.go

@@ -15,6 +15,7 @@ import (
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/web"
 	"code.gitea.io/gitea/routers/api/packages/cargo"
+	"code.gitea.io/gitea/routers/api/packages/chef"
 	"code.gitea.io/gitea/routers/api/packages/composer"
 	"code.gitea.io/gitea/routers/api/packages/conan"
 	"code.gitea.io/gitea/routers/api/packages/conda"
@@ -54,6 +55,7 @@ func CommonRoutes(ctx gocontext.Context) *web.Route {
 		&auth.Basic{},
 		&nuget.Auth{},
 		&conan.Auth{},
+		&chef.Auth{},
 	}
 	if setting.Service.EnableReverseProxyAuth {
 		authMethods = append(authMethods, &auth.ReverseProxy{})
@@ -86,6 +88,25 @@ func CommonRoutes(ctx gocontext.Context) *web.Route {
 				})
 			})
 		}, reqPackageAccess(perm.AccessModeRead))
+		r.Group("/chef", func() {
+			r.Group("/api/v1", func() {
+				r.Get("/universe", chef.PackagesUniverse)
+				r.Get("/search", chef.EnumeratePackages)
+				r.Group("/cookbooks", func() {
+					r.Get("", chef.EnumeratePackages)
+					r.Post("", reqPackageAccess(perm.AccessModeWrite), chef.UploadPackage)
+					r.Group("/{name}", func() {
+						r.Get("", chef.PackageMetadata)
+						r.Group("/versions/{version}", func() {
+							r.Get("", chef.PackageVersionMetadata)
+							r.Delete("", reqPackageAccess(perm.AccessModeWrite), chef.DeletePackageVersion)
+							r.Get("/download", chef.DownloadPackage)
+						})
+						r.Delete("", reqPackageAccess(perm.AccessModeWrite), chef.DeletePackage)
+					})
+				})
+			})
+		}, reqPackageAccess(perm.AccessModeRead))
 		r.Group("/composer", func() {
 			r.Get("/packages.json", composer.ServiceIndex)
 			r.Get("/search.json", composer.SearchPackages)

routers/api/packages/chef/auth.go

@@ -0,0 +1,270 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package chef
+
+import (
+	"crypto"
+	"crypto/rsa"
+	"crypto/sha1"
+	"crypto/sha256"
+	"crypto/x509"
+	"encoding/base64"
+	"encoding/pem"
+	"fmt"
+	"hash"
+	"math/big"
+	"net/http"
+	"path"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+
+	user_model "code.gitea.io/gitea/models/user"
+	chef_module "code.gitea.io/gitea/modules/packages/chef"
+	"code.gitea.io/gitea/modules/util"
+	"code.gitea.io/gitea/services/auth"
+)
+
+const (
+	maxTimeDifference = 10 * time.Minute
+)
+
+var (
+	algorithmPattern     = regexp.MustCompile(`algorithm=(\w+)`)
+	versionPattern       = regexp.MustCompile(`version=(\d+\.\d+)`)
+	authorizationPattern = regexp.MustCompile(`\AX-Ops-Authorization-(\d+)`)
+)
+
+// Documentation:
+// https://docs.chef.io/server/api_chef_server/#required-headers
+// https://github.com/chef-boneyard/chef-rfc/blob/master/rfc065-sign-v1.3.md
+// https://github.com/chef/mixlib-authentication/blob/bc8adbef833d4be23dc78cb23e6fe44b51ebc34f/lib/mixlib/authentication/signedheaderauth.rb
+
+type Auth struct{}
+
+func (a *Auth) Name() string {
+	return "chef"
+}
+
+// Verify extracts the user from the signed request
+// If the request is signed with the user private key the user is verified.
+func (a *Auth) Verify(req *http.Request, w http.ResponseWriter, store auth.DataStore, sess auth.SessionStore) (*user_model.User, error) {
+	u, err := getUserFromRequest(req)
+	if err != nil {
+		return nil, err
+	}
+	if u == nil {
+		return nil, nil
+	}
+
+	pub, err := getUserPublicKey(u)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := verifyTimestamp(req); err != nil {
+		return nil, err
+	}
+
+	version, err := getSignVersion(req)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := verifySignedHeaders(req, version, pub.(*rsa.PublicKey)); err != nil {
+		return nil, err
+	}
+
+	return u, nil
+}
+
+func getUserFromRequest(req *http.Request) (*user_model.User, error) {
+	username := req.Header.Get("X-Ops-Userid")
+	if username == "" {
+		return nil, nil
+	}
+
+	return user_model.GetUserByName(req.Context(), username)
+}
+
+func getUserPublicKey(u *user_model.User) (crypto.PublicKey, error) {
+	pubKey, err := user_model.GetSetting(u.ID, chef_module.SettingPublicPem)
+	if err != nil {
+		return nil, err
+	}
+
+	pubPem, _ := pem.Decode([]byte(pubKey))
+
+	return x509.ParsePKIXPublicKey(pubPem.Bytes)
+}
+
+func verifyTimestamp(req *http.Request) error {
+	hdr := req.Header.Get("X-Ops-Timestamp")
+	if hdr == "" {
+		return util.NewInvalidArgumentErrorf("X-Ops-Timestamp header missing")
+	}
+
+	ts, err := time.Parse(time.RFC3339, hdr)
+	if err != nil {
+		return err
+	}
+
+	diff := time.Now().UTC().Sub(ts)
+	if diff < 0 {
+		diff = -diff
+	}
+
+	if diff > maxTimeDifference {
+		return fmt.Errorf("time difference")
+	}
+
+	return nil
+}
+
+func getSignVersion(req *http.Request) (string, error) {
+	hdr := req.Header.Get("X-Ops-Sign")
+	if hdr == "" {
+		return "", util.NewInvalidArgumentErrorf("X-Ops-Sign header missing")
+	}
+
+	m := versionPattern.FindStringSubmatch(hdr)
+	if len(m) != 2 {
+		return "", util.NewInvalidArgumentErrorf("invalid X-Ops-Sign header")
+	}
+
+	switch m[1] {
+	case "1.0", "1.1", "1.2", "1.3":
+	default:
+		return "", util.NewInvalidArgumentErrorf("unsupported version")
+	}
+
+	version := m[1]
+
+	m = algorithmPattern.FindStringSubmatch(hdr)
+	if len(m) == 2 && m[1] != "sha1" && !(m[1] == "sha256" && version == "1.3") {
+		return "", util.NewInvalidArgumentErrorf("unsupported algorithm")
+	}
+
+	return version, nil
+}
+
+func verifySignedHeaders(req *http.Request, version string, pub *rsa.PublicKey) error {
+	authorizationData, err := getAuthorizationData(req)
+	if err != nil {
+		return err
+	}
+
+	checkData := buildCheckData(req, version)
+
+	switch version {
+	case "1.3":
+		return verifyDataNew(authorizationData, checkData, pub, crypto.SHA256)
+	case "1.2":
+		return verifyDataNew(authorizationData, checkData, pub, crypto.SHA1)
+	default:
+		return verifyDataOld(authorizationData, checkData, pub)
+	}
+}
+
+func getAuthorizationData(req *http.Request) ([]byte, error) {
+	valueList := make(map[int]string)
+	for k, vs := range req.Header {
+		if m := authorizationPattern.FindStringSubmatch(k); m != nil {
+			index, _ := strconv.Atoi(m[1])
+			var v string
+			if len(vs) == 0 {
+				v = ""
+			} else {
+				v = vs[0]
+			}
+			valueList[index] = v
+		}
+	}
+
+	tmp := make([]string, len(valueList))
+	for k, v := range valueList {
+		if k > len(tmp) {
+			return nil, fmt.Errorf("invalid X-Ops-Authorization headers")
+		}
+		tmp[k-1] = v
+	}
+
+	return base64.StdEncoding.DecodeString(strings.Join(tmp, ""))
+}
+
+func buildCheckData(req *http.Request, version string) []byte {
+	username := req.Header.Get("X-Ops-Userid")
+	if version != "1.0" && version != "1.3" {
+		sum := sha1.Sum([]byte(username))
+		username = base64.StdEncoding.EncodeToString(sum[:])
+	}
+
+	var data string
+	if version == "1.3" {
+		data = fmt.Sprintf(
+			"Method:%s\nPath:%s\nX-Ops-Content-Hash:%s\nX-Ops-Sign:version=%s\nX-Ops-Timestamp:%s\nX-Ops-UserId:%s\nX-Ops-Server-API-Version:%s",
+			req.Method,
+			path.Clean(req.URL.Path),
+			req.Header.Get("X-Ops-Content-Hash"),
+			version,
+			req.Header.Get("X-Ops-Timestamp"),
+			username,
+			req.Header.Get("X-Ops-Server-Api-Version"),
+		)
+	} else {
+		sum := sha1.Sum([]byte(path.Clean(req.URL.Path)))
+		data = fmt.Sprintf(
+			"Method:%s\nHashed Path:%s\nX-Ops-Content-Hash:%s\nX-Ops-Timestamp:%s\nX-Ops-UserId:%s",
+			req.Method,
+			base64.StdEncoding.EncodeToString(sum[:]),
+			req.Header.Get("X-Ops-Content-Hash"),
+			req.Header.Get("X-Ops-Timestamp"),
+			username,
+		)
+	}
+
+	return []byte(data)
+}
+
+func verifyDataNew(signature, data []byte, pub *rsa.PublicKey, algo crypto.Hash) error {
+	var h hash.Hash
+	if algo == crypto.SHA256 {
+		h = sha256.New()
+	} else {
+		h = sha1.New()
+	}
+	if _, err := h.Write(data); err != nil {
+		return err
+	}
+
+	return rsa.VerifyPKCS1v15(pub, algo, h.Sum(nil), signature)
+}
+
+func verifyDataOld(signature, data []byte, pub *rsa.PublicKey) error {
+	c := new(big.Int)
+	m := new(big.Int)
+	m.SetBytes(signature)
+	e := big.NewInt(int64(pub.E))
+	c.Exp(m, e, pub.N)
+
+	out := c.Bytes()
+
+	skip := 0
+	for i := 2; i < len(out); i++ {
+		if i+1 >= len(out) {
+			break
+		}
+		if out[i] == 0xFF && out[i+1] == 0 {
+			skip = i + 2
+			break
+		}
+	}
+
+	if !util.SliceEqual(out[skip:], data) {
+		return fmt.Errorf("could not verify signature")
+	}
+
+	return nil
+}

routers/api/packages/chef/chef.go

@@ -0,0 +1,404 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package chef
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"sort"
+	"strings"
+	"time"
+
+	"code.gitea.io/gitea/models/db"
+	packages_model "code.gitea.io/gitea/models/packages"
+	"code.gitea.io/gitea/modules/context"
+	packages_module "code.gitea.io/gitea/modules/packages"
+	chef_module "code.gitea.io/gitea/modules/packages/chef"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
+	"code.gitea.io/gitea/routers/api/packages/helper"
+	packages_service "code.gitea.io/gitea/services/packages"
+)
+
+func apiError(ctx *context.Context, status int, obj interface{}) {
+	type Error struct {
+		ErrorMessages []string `json:"error_messages"`
+	}
+
+	helper.LogAndProcessError(ctx, status, obj, func(message string) {
+		ctx.JSON(status, Error{
+			ErrorMessages: []string{message},
+		})
+	})
+}
+
+func PackagesUniverse(ctx *context.Context) {
+	pvs, _, err := packages_model.SearchVersions(ctx, &packages_model.PackageSearchOptions{
+		OwnerID:    ctx.Package.Owner.ID,
+		Type:       packages_model.TypeChef,
+		IsInternal: util.OptionalBoolFalse,
+	})
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	pds, err := packages_model.GetPackageDescriptors(ctx, pvs)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	type VersionInfo struct {
+		LocationType string            `json:"location_type"`
+		LocationPath string            `json:"location_path"`
+		DownloadURL  string            `json:"download_url"`
+		Dependencies map[string]string `json:"dependencies"`
+	}
+
+	baseURL := setting.AppURL + "api/packages/" + ctx.Package.Owner.Name + "/chef/api/v1"
+
+	universe := make(map[string]map[string]*VersionInfo)
+	for _, pd := range pds {
+		if _, ok := universe[pd.Package.Name]; !ok {
+			universe[pd.Package.Name] = make(map[string]*VersionInfo)
+		}
+		universe[pd.Package.Name][pd.Version.Version] = &VersionInfo{
+			LocationType: "opscode",
+			LocationPath: baseURL,
+			DownloadURL:  fmt.Sprintf("%s/cookbooks/%s/versions/%s/download", baseURL, url.PathEscape(pd.Package.Name), pd.Version.Version),
+			Dependencies: pd.Metadata.(*chef_module.Metadata).Dependencies,
+		}
+	}
+
+	ctx.JSON(http.StatusOK, universe)
+}
+
+// https://github.com/chef/chef/blob/main/knife/lib/chef/knife/supermarket_list.rb
+// https://github.com/chef/chef/blob/main/knife/lib/chef/knife/supermarket_search.rb
+func EnumeratePackages(ctx *context.Context) {
+	opts := &packages_model.PackageSearchOptions{
+		OwnerID:    ctx.Package.Owner.ID,
+		Type:       packages_model.TypeChef,
+		Name:       packages_model.SearchValue{Value: ctx.FormTrim("q")},
+		IsInternal: util.OptionalBoolFalse,
+		Paginator: db.NewAbsoluteListOptions(
+			ctx.FormInt("start"),
+			ctx.FormInt("items"),
+		),
+	}
+
+	switch strings.ToLower(ctx.FormTrim("order")) {
+	case "recently_updated", "recently_added":
+		opts.Sort = packages_model.SortCreatedDesc
+	default:
+		opts.Sort = packages_model.SortNameAsc
+	}
+
+	pvs, total, err := packages_model.SearchLatestVersions(ctx, opts)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	pds, err := packages_model.GetPackageDescriptors(ctx, pvs)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	type Item struct {
+		CookbookName        string `json:"cookbook_name"`
+		CookbookMaintainer  string `json:"cookbook_maintainer"`
+		CookbookDescription string `json:"cookbook_description"`
+		Cookbook            string `json:"cookbook"`
+	}
+
+	type Result struct {
+		Start int     `json:"start"`
+		Total int     `json:"total"`
+		Items []*Item `json:"items"`
+	}
+
+	baseURL := setting.AppURL + "api/packages/" + ctx.Package.Owner.Name + "/chef/api/v1/cookbooks/"
+
+	items := make([]*Item, 0, len(pds))
+	for _, pd := range pds {
+		metadata := pd.Metadata.(*chef_module.Metadata)
+
+		items = append(items, &Item{
+			CookbookName:        pd.Package.Name,
+			CookbookMaintainer:  metadata.Author,
+			CookbookDescription: metadata.Description,
+			Cookbook:            baseURL + url.PathEscape(pd.Package.Name),
+		})
+	}
+
+	skip, _ := opts.Paginator.GetSkipTake()
+
+	ctx.JSON(http.StatusOK, &Result{
+		Start: skip,
+		Total: int(total),
+		Items: items,
+	})
+}
+
+// https://github.com/chef/chef/blob/main/knife/lib/chef/knife/supermarket_show.rb
+func PackageMetadata(ctx *context.Context) {
+	packageName := ctx.Params("name")
+
+	pvs, err := packages_model.GetVersionsByPackageName(ctx, ctx.Package.Owner.ID, packages_model.TypeChef, packageName)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if len(pvs) == 0 {
+		apiError(ctx, http.StatusNotFound, nil)
+		return
+	}
+
+	pds, err := packages_model.GetPackageDescriptors(ctx, pvs)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	sort.Slice(pds, func(i, j int) bool {
+		return pds[i].SemVer.LessThan(pds[j].SemVer)
+	})
+
+	type Result struct {
+		Name          string    `json:"name"`
+		Maintainer    string    `json:"maintainer"`
+		Description   string    `json:"description"`
+		Category      string    `json:"category"`
+		LatestVersion string    `json:"latest_version"`
+		SourceURL     string    `json:"source_url"`
+		CreatedAt     time.Time `json:"created_at"`
+		UpdatedAt     time.Time `json:"updated_at"`
+		Deprecated    bool      `json:"deprecated"`
+		Versions      []string  `json:"versions"`
+	}
+
+	baseURL := fmt.Sprintf("%sapi/packages/%s/chef/api/v1/cookbooks/%s/versions/", setting.AppURL, ctx.Package.Owner.Name, url.PathEscape(packageName))
+
+	versions := make([]string, 0, len(pds))
+	for _, pd := range pds {
+		versions = append(versions, baseURL+pd.Version.Version)
+	}
+
+	latest := pds[len(pds)-1]
+
+	metadata := latest.Metadata.(*chef_module.Metadata)
+
+	ctx.JSON(http.StatusOK, &Result{
+		Name:          latest.Package.Name,
+		Maintainer:    metadata.Author,
+		Description:   metadata.Description,
+		LatestVersion: baseURL + latest.Version.Version,
+		SourceURL:     metadata.RepositoryURL,
+		CreatedAt:     latest.Version.CreatedUnix.AsLocalTime(),
+		UpdatedAt:     latest.Version.CreatedUnix.AsLocalTime(),
+		Deprecated:    false,
+		Versions:      versions,
+	})
+}
+
+// https://github.com/chef/chef/blob/main/knife/lib/chef/knife/supermarket_show.rb
+func PackageVersionMetadata(ctx *context.Context) {
+	packageName := ctx.Params("name")
+	packageVersion := strings.ReplaceAll(ctx.Params("version"), "_", ".") // Chef calls this endpoint with "_" instead of "."?!
+
+	pv, err := packages_model.GetVersionByNameAndVersion(ctx, ctx.Package.Owner.ID, packages_model.TypeChef, packageName, packageVersion)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	pd, err := packages_model.GetPackageDescriptor(ctx, pv)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	type Result struct {
+		Version         string            `json:"version"`
+		TarballFileSize int64             `json:"tarball_file_size"`
+		PublishedAt     time.Time         `json:"published_at"`
+		Cookbook        string            `json:"cookbook"`
+		File            string            `json:"file"`
+		License         string            `json:"license"`
+		Dependencies    map[string]string `json:"dependencies"`
+	}
+
+	baseURL := fmt.Sprintf("%sapi/packages/%s/chef/api/v1/cookbooks/%s", setting.AppURL, ctx.Package.Owner.Name, url.PathEscape(pd.Package.Name))
+
+	metadata := pd.Metadata.(*chef_module.Metadata)
+
+	ctx.JSON(http.StatusOK, &Result{
+		Version:         pd.Version.Version,
+		TarballFileSize: pd.Files[0].Blob.Size,
+		PublishedAt:     pd.Version.CreatedUnix.AsLocalTime(),
+		Cookbook:        baseURL,
+		File:            fmt.Sprintf("%s/versions/%s/download", baseURL, pd.Version.Version),
+		License:         metadata.License,
+		Dependencies:    metadata.Dependencies,
+	})
+}
+
+// https://github.com/chef/chef/blob/main/knife/lib/chef/knife/supermarket_share.rb
+func UploadPackage(ctx *context.Context) {
+	file, _, err := ctx.Req.FormFile("tarball")
+	if err != nil {
+		apiError(ctx, http.StatusBadRequest, err)
+		return
+	}
+	defer file.Close()
+
+	buf, err := packages_module.CreateHashedBufferFromReader(file, 32*1024*1024)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer buf.Close()
+
+	pck, err := chef_module.ParsePackage(buf)
+	if err != nil {
+		if errors.Is(err, util.ErrInvalidArgument) {
+			apiError(ctx, http.StatusBadRequest, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	if _, err := buf.Seek(0, io.SeekStart); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	_, _, err = packages_service.CreatePackageAndAddFile(
+		&packages_service.PackageCreationInfo{
+			PackageInfo: packages_service.PackageInfo{
+				Owner:       ctx.Package.Owner,
+				PackageType: packages_model.TypeChef,
+				Name:        pck.Name,
+				Version:     pck.Version,
+			},
+			Creator:          ctx.Doer,
+			SemverCompatible: true,
+			Metadata:         pck.Metadata,
+		},
+		&packages_service.PackageFileCreationInfo{
+			PackageFileInfo: packages_service.PackageFileInfo{
+				Filename: strings.ToLower(pck.Version + ".tar.gz"),
+			},
+			Creator: ctx.Doer,
+			Data:    buf,
+			IsLead:  true,
+		},
+	)
+	if err != nil {
+		switch err {
+		case packages_model.ErrDuplicatePackageVersion:
+			apiError(ctx, http.StatusBadRequest, err)
+		case packages_service.ErrQuotaTotalCount, packages_service.ErrQuotaTypeSize, packages_service.ErrQuotaTotalSize:
+			apiError(ctx, http.StatusForbidden, err)
+		default:
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	ctx.JSON(http.StatusCreated, make(map[any]any))
+}
+
+// https://github.com/chef/chef/blob/main/knife/lib/chef/knife/supermarket_download.rb
+func DownloadPackage(ctx *context.Context) {
+	pv, err := packages_model.GetVersionByNameAndVersion(ctx, ctx.Package.Owner.ID, packages_model.TypeChef, ctx.Params("name"), ctx.Params("version"))
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+			return
+		}
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	pd, err := packages_model.GetPackageDescriptor(ctx, pv)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	pf := pd.Files[0].File
+
+	s, _, err := packages_service.GetPackageFileStream(ctx, pf)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer s.Close()
+
+	ctx.ServeContent(s, &context.ServeHeaderOptions{
+		Filename:     pf.Name,
+		LastModified: pf.CreatedUnix.AsLocalTime(),
+	})
+}
+
+// https://github.com/chef/chef/blob/main/knife/lib/chef/knife/supermarket_unshare.rb
+func DeletePackageVersion(ctx *context.Context) {
+	packageName := ctx.Params("name")
+	packageVersion := ctx.Params("version")
+
+	err := packages_service.RemovePackageVersionByNameAndVersion(
+		ctx.Doer,
+		&packages_service.PackageInfo{
+			Owner:       ctx.Package.Owner,
+			PackageType: packages_model.TypeChef,
+			Name:        packageName,
+			Version:     packageVersion,
+		},
+	)
+	if err != nil {
+		if err == packages_model.ErrPackageNotExist {
+			apiError(ctx, http.StatusNotFound, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	ctx.Status(http.StatusOK)
+}
+
+// https://github.com/chef/chef/blob/main/knife/lib/chef/knife/supermarket_unshare.rb
+func DeletePackage(ctx *context.Context) {
+	pvs, err := packages_model.GetVersionsByPackageName(ctx, ctx.Package.Owner.ID, packages_model.TypeChef, ctx.Params("name"))
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	if len(pvs) == 0 {
+		apiError(ctx, http.StatusNotFound, err)
+		return
+	}
+
+	for _, pv := range pvs {
+		if err := packages_service.RemovePackageVersion(ctx.Doer, pv); err != nil {
+			apiError(ctx, http.StatusInternalServerError, err)
+			return
+		}
+	}
+
+	ctx.Status(http.StatusOK)
+}

routers/api/v1/packages/package.go

@@ -40,7 +40,7 @@ func ListPackages(ctx *context.APIContext) {
 	//   in: query
 	//   description: package type filter
 	//   type: string
-	//   enum: [cargo, composer, conan, conda, container, generic, helm, maven, npm, nuget, pub, pypi, rubygems, vagrant]
+	//   enum: [cargo, chef, composer, conan, conda, container, generic, helm, maven, npm, nuget, pub, pypi, rubygems, vagrant]
 	// - name: q
 	//   in: query
 	//   description: name filter

routers/web/user/setting/packages.go

@@ -5,10 +5,14 @@ package setting
 
 import (
 	"net/http"
+	"strings"
 
+	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
+	chef_module "code.gitea.io/gitea/modules/packages/chef"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
 	shared "code.gitea.io/gitea/routers/web/shared/packages"
 )
 
@@ -95,3 +99,21 @@ func RebuildCargoIndex(ctx *context.Context) {
 
 	ctx.Redirect(setting.AppSubURL + "/user/settings/packages")
 }
+
+func RegenerateChefKeyPair(ctx *context.Context) {
+	priv, pub, err := util.GenerateKeyPair(chef_module.KeyBits)
+	if err != nil {
+		ctx.ServerError("GenerateKeyPair", err)
+		return
+	}
+
+	if err := user_model.SetUserSetting(ctx.Doer.ID, chef_module.SettingPublicPem, pub); err != nil {
+		ctx.ServerError("SetUserSetting", err)
+		return
+	}
+
+	ctx.ServeContent(strings.NewReader(priv), &context.ServeHeaderOptions{
+		ContentType: "application/x-pem-file",
+		Filename:    ctx.Doer.Name + ".priv",
+	})
+}

routers/web/web.go

@@ -472,6 +472,7 @@ func RegisterRoutes(m *web.Route) {
 				m.Post("/initialize", user_setting.InitializeCargoIndex)
 				m.Post("/rebuild", user_setting.RebuildCargoIndex)
 			})
+			m.Post("/chef/regenerate_keypair", user_setting.RegenerateChefKeyPair)
 		}, packagesEnabled)
 		m.Group("/secrets", func() {
 			m.Get("", user_setting.Secrets)