Fix ssh deploy and user key constraints (#1357) (#5939)

1. A key can either be an ssh user key or a deploy key. It cannot be both. 2. If a key is a user key - it can only be associated with one user. 3. If a key is a deploy key - it can be used in multiple repositories and the permissions it has on those repositories can be different. 4. If a repository is deleted, its deploy keys must be deleted too. We currently don't enforce any of this and multiple repositories access with different permissions doesn't work at all. This PR enforces the following constraints: - [x] You should not be able to add the same user key as another user - [x] You should not be able to add a ssh user key which is being used as a deploy key - [x] You should not be able to add a ssh deploy key which is being used as a user key - [x] If you add an ssh deploy key to another repository you should be able to use it in different modes without losing the ability to use it in the other mode. - [x] If you delete a repository you must delete all its deploy keys. Fix #1357
2019-02-03 23:56:53 +00:00 · 2019-02-03 23:56:53 +00:00 · 01c10a951b
commit 01c10a951b
parent 634cbaad2b
14 changed files with 697 additions and 345 deletions
--- a/cmd/serv.go
+++ b/cmd/serv.go
@ -234,19 +234,20 @@ func runServ(c *cli.Context) error {

 		// Check deploy key or user key.
 		if key.Type == models.KeyTypeDeploy {
-			if key.Mode < requestedMode {
-				fail("Key permission denied", "Cannot push with deployment key: %d", key.ID)
-			}
-
-			// Check if this deploy key belongs to current repository.
-			has, err := private.HasDeployKey(key.ID, repo.ID)
+			// Now we have to get the deploy key for this repo
+			deployKey, err := private.GetDeployKey(key.ID, repo.ID)
 			if err != nil {
 				fail("Key access denied", "Failed to access internal api: [key_id: %d, repo_id: %d]", key.ID, repo.ID)
 			}
-			if !has {
+
+			if deployKey == nil {
 				fail("Key access denied", "Deploy key access denied: [key_id: %d, repo_id: %d]", key.ID, repo.ID)
 			}

+			if deployKey.Mode < requestedMode {
+				fail("Key permission denied", "Cannot push with read-only deployment key: %d to repo_id: %d", key.ID, repo.ID)
+			}
+
 			// Update deploy key activity.
 			if err = private.UpdateDeployKeyUpdated(key.ID, repo.ID); err != nil {
 				fail("Internal error", "UpdateDeployKey: %v", err)
--- a/integrations/api_helper_for_declarative_test.go
+++ b/integrations/api_helper_for_declarative_test.go
@ -0,0 +1,152 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package integrations
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"testing"
+
+	api "code.gitea.io/sdk/gitea"
+	"github.com/stretchr/testify/assert"
+)
+
+type APITestContext struct {
+	Reponame     string
+	Session      *TestSession
+	Token        string
+	Username     string
+	ExpectedCode int
+}
+
+func NewAPITestContext(t *testing.T, username, reponame string) APITestContext {
+	session := loginUser(t, username)
+	token := getTokenForLoggedInUser(t, session)
+	return APITestContext{
+		Session:  session,
+		Token:    token,
+		Username: username,
+		Reponame: reponame,
+	}
+}
+
+func (ctx APITestContext) GitPath() string {
+	return fmt.Sprintf("%s/%s.git", ctx.Username, ctx.Reponame)
+}
+
+func doAPICreateRepository(ctx APITestContext, empty bool, callback ...func(*testing.T, api.Repository)) func(*testing.T) {
+	return func(t *testing.T) {
+		createRepoOption := &api.CreateRepoOption{
+			AutoInit:    !empty,
+			Description: "Temporary repo",
+			Name:        ctx.Reponame,
+			Private:     true,
+			Gitignores:  "",
+			License:     "WTFPL",
+			Readme:      "Default",
+		}
+		req := NewRequestWithJSON(t, "POST", "/api/v1/user/repos?token="+ctx.Token, createRepoOption)
+		if ctx.ExpectedCode != 0 {
+			ctx.Session.MakeRequest(t, req, ctx.ExpectedCode)
+			return
+		}
+		resp := ctx.Session.MakeRequest(t, req, http.StatusCreated)
+
+		var repository api.Repository
+		DecodeJSON(t, resp, &repository)
+		if len(callback) > 0 {
+			callback[0](t, repository)
+		}
+	}
+}
+
+func doAPIGetRepository(ctx APITestContext, callback ...func(*testing.T, api.Repository)) func(*testing.T) {
+	return func(t *testing.T) {
+		urlStr := fmt.Sprintf("/api/v1/repos/%s/%s?token=%s", ctx.Username, ctx.Reponame, ctx.Token)
+
+		req := NewRequest(t, "GET", urlStr)
+		if ctx.ExpectedCode != 0 {
+			ctx.Session.MakeRequest(t, req, ctx.ExpectedCode)
+			return
+		}
+		resp := ctx.Session.MakeRequest(t, req, http.StatusOK)
+
+		var repository api.Repository
+		DecodeJSON(t, resp, &repository)
+		if len(callback) > 0 {
+			callback[0](t, repository)
+		}
+	}
+}
+
+func doAPIDeleteRepository(ctx APITestContext) func(*testing.T) {
+	return func(t *testing.T) {
+		urlStr := fmt.Sprintf("/api/v1/repos/%s/%s?token=%s", ctx.Username, ctx.Reponame, ctx.Token)
+
+		req := NewRequest(t, "DELETE", urlStr)
+		if ctx.ExpectedCode != 0 {
+			ctx.Session.MakeRequest(t, req, ctx.ExpectedCode)
+			return
+		}
+		ctx.Session.MakeRequest(t, req, http.StatusNoContent)
+	}
+}
+
+func doAPICreateUserKey(ctx APITestContext, keyname, keyFile string, callback ...func(*testing.T, api.PublicKey)) func(*testing.T) {
+	return func(t *testing.T) {
+		urlStr := fmt.Sprintf("/api/v1/user/keys?token=%s", ctx.Token)
+
+		dataPubKey, err := ioutil.ReadFile(keyFile + ".pub")
+		assert.NoError(t, err)
+		req := NewRequestWithJSON(t, "POST", urlStr, &api.CreateKeyOption{
+			Title: keyname,
+			Key:   string(dataPubKey),
+		})
+		if ctx.ExpectedCode != 0 {
+			ctx.Session.MakeRequest(t, req, ctx.ExpectedCode)
+			return
+		}
+		resp := ctx.Session.MakeRequest(t, req, http.StatusCreated)
+		var publicKey api.PublicKey
+		DecodeJSON(t, resp, &publicKey)
+		if len(callback) > 0 {
+			callback[0](t, publicKey)
+		}
+	}
+}
+
+func doAPIDeleteUserKey(ctx APITestContext, keyID int64) func(*testing.T) {
+	return func(t *testing.T) {
+		urlStr := fmt.Sprintf("/api/v1/user/keys/%d?token=%s", keyID, ctx.Token)
+
+		req := NewRequest(t, "DELETE", urlStr)
+		if ctx.ExpectedCode != 0 {
+			ctx.Session.MakeRequest(t, req, ctx.ExpectedCode)
+			return
+		}
+		ctx.Session.MakeRequest(t, req, http.StatusNoContent)
+	}
+}
+
+func doAPICreateDeployKey(ctx APITestContext, keyname, keyFile string, readOnly bool) func(*testing.T) {
+	return func(t *testing.T) {
+		urlStr := fmt.Sprintf("/api/v1/repos/%s/%s/keys?token=%s", ctx.Username, ctx.Reponame, ctx.Token)
+
+		dataPubKey, err := ioutil.ReadFile(keyFile + ".pub")
+		assert.NoError(t, err)
+		req := NewRequestWithJSON(t, "POST", urlStr, api.CreateKeyOption{
+			Title:    keyname,
+			Key:      string(dataPubKey),
+			ReadOnly: readOnly,
+		})
+
+		if ctx.ExpectedCode != 0 {
+			ctx.Session.MakeRequest(t, req, ctx.ExpectedCode)
+			return
+		}
+		ctx.Session.MakeRequest(t, req, http.StatusCreated)
+	}
+}
--- a/integrations/deploy_key_push_test.go
+++ b/integrations/deploy_key_push_test.go
@ -1,160 +0,0 @@
-// Copyright 2019 The Gitea Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
-
-package integrations
-
-import (
-	"fmt"
-	"io/ioutil"
-	"log"
-	"net/http"
-	"net/url"
-	"os"
-	"os/exec"
-	"path/filepath"
-	"testing"
-	"time"
-
-	"code.gitea.io/git"
-
-	"code.gitea.io/gitea/modules/setting"
-	api "code.gitea.io/sdk/gitea"
-	"github.com/stretchr/testify/assert"
-)
-
-func createEmptyRepository(username, reponame string) func(*testing.T) {
-	return func(t *testing.T) {
-		session := loginUser(t, username)
-		token := getTokenForLoggedInUser(t, session)
-		req := NewRequestWithJSON(t, "POST", "/api/v1/user/repos?token="+token, &api.CreateRepoOption{
-			AutoInit:    false,
-			Description: "Temporary empty repo",
-			Name:        reponame,
-			Private:     false,
-		})
-		session.MakeRequest(t, req, http.StatusCreated)
-	}
-}
-
-func createDeployKey(username, reponame, keyname, keyFile string, readOnly bool) func(*testing.T) {
-	return func(t *testing.T) {
-		session := loginUser(t, username)
-		token := getTokenForLoggedInUser(t, session)
-		urlStr := fmt.Sprintf("/api/v1/repos/%s/%s/keys?token=%s", username, reponame, token)
-
-		dataPubKey, err := ioutil.ReadFile(keyFile + ".pub")
-		assert.NoError(t, err)
-		req := NewRequestWithJSON(t, "POST", urlStr, api.CreateKeyOption{
-			Title:    keyname,
-			Key:      string(dataPubKey),
-			ReadOnly: readOnly,
-		})
-		session.MakeRequest(t, req, http.StatusCreated)
-	}
-}
-
-func initTestRepository(dstPath string) func(*testing.T) {
-	return func(t *testing.T) {
-		// Init repository in dstPath
-		assert.NoError(t, git.InitRepository(dstPath, false))
-		assert.NoError(t, ioutil.WriteFile(filepath.Join(dstPath, "README.md"), []byte(fmt.Sprintf("# Testing Repository\n\nOriginally created in: %s", dstPath)), 0644))
-		assert.NoError(t, git.AddChanges(dstPath, true))
-		signature := git.Signature{
-			Email: "test@example.com",
-			Name:  "test",
-			When:  time.Now(),
-		}
-		assert.NoError(t, git.CommitChanges(dstPath, git.CommitChangesOptions{
-			Committer: &signature,
-			Author:    &signature,
-			Message:   "Initial Commit",
-		}))
-	}
-}
-
-func pushTestRepository(dstPath, username, reponame string, u url.URL, keyFile string) func(*testing.T) {
-	return func(t *testing.T) {
-		//Setup remote link
-		u.Scheme = "ssh"
-		u.User = url.User("git")
-		u.Host = fmt.Sprintf("%s:%d", setting.SSH.ListenHost, setting.SSH.ListenPort)
-
-		//Setup ssh wrapper
-		os.Setenv("GIT_SSH_COMMAND",
-			"ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i "+
-				filepath.Join(setting.AppWorkPath, keyFile))
-		os.Setenv("GIT_SSH_VARIANT", "ssh")
-
-		log.Printf("Adding remote: %s\n", u.String())
-		_, err := git.NewCommand("remote", "add", "origin", u.String()).RunInDir(dstPath)
-		assert.NoError(t, err)
-
-		log.Printf("Pushing to: %s\n", u.String())
-		_, err = git.NewCommand("push", "-u", "origin", "master").RunInDir(dstPath)
-		assert.NoError(t, err)
-	}
-}
-
-func checkRepositoryEmptyStatus(username, reponame string, isEmpty bool) func(*testing.T) {
-	return func(t *testing.T) {
-		session := loginUser(t, username)
-		token := getTokenForLoggedInUser(t, session)
-		urlStr := fmt.Sprintf("/api/v1/repos/%s/%s?token=%s", username, reponame, token)
-
-		req := NewRequest(t, "GET", urlStr)
-		resp := session.MakeRequest(t, req, http.StatusOK)
-
-		var repository api.Repository
-		DecodeJSON(t, resp, &repository)
-
-		assert.Equal(t, isEmpty, repository.Empty)
-	}
-}
-
-func deleteRepository(username, reponame string) func(*testing.T) {
-	return func(t *testing.T) {
-		session := loginUser(t, username)
-		token := getTokenForLoggedInUser(t, session)
-		urlStr := fmt.Sprintf("/api/v1/repos/%s/%s?token=%s", username, reponame, token)
-
-		req := NewRequest(t, "DELETE", urlStr)
-		session.MakeRequest(t, req, http.StatusNoContent)
-	}
-}
-
-func TestPushDeployKeyOnEmptyRepo(t *testing.T) {
-	onGiteaRun(t, testPushDeployKeyOnEmptyRepo)
-}
-
-func testPushDeployKeyOnEmptyRepo(t *testing.T, u *url.URL) {
-	reponame := "deploy-key-empty-repo-1"
-	username := "user2"
-	u.Path = fmt.Sprintf("%s/%s.git", username, reponame)
-	keyname := fmt.Sprintf("%s-push", reponame)
-
-	t.Run("CreateEmptyRepository", createEmptyRepository(username, reponame))
-	t.Run("CheckIsEmpty", checkRepositoryEmptyStatus(username, reponame, true))
-
-	//Setup the push deploy key file
-	keyFile := filepath.Join(setting.AppDataPath, keyname)
-	err := exec.Command("ssh-keygen", "-f", keyFile, "-t", "rsa", "-N", "").Run()
-	assert.NoError(t, err)
-	defer os.RemoveAll(keyFile)
-	defer os.RemoveAll(keyFile + ".pub")
-
-	t.Run("CreatePushDeployKey", createDeployKey(username, reponame, keyname, keyFile, false))
-
-	// Setup the testing repository
-	dstPath, err := ioutil.TempDir("", "repo-tmp-deploy-key-empty-repo-1")
-	assert.NoError(t, err)
-	defer os.RemoveAll(dstPath)
-
-	t.Run("InitTestRepository", initTestRepository(dstPath))
-	t.Run("SSHPushTestRepository", pushTestRepository(dstPath, username, reponame, *u, keyFile))
-
-	log.Println("Done Push")
-	t.Run("CheckIsNotEmpty", checkRepositoryEmptyStatus(username, reponame, false))
-
-	t.Run("DeleteRepository", deleteRepository(username, reponame))
-}
--- a/integrations/git_helper_for_declarative_test.go
+++ b/integrations/git_helper_for_declarative_test.go
@ -0,0 +1,127 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package integrations
+
+import (
+	"context"
+	"fmt"
+	"io/ioutil"
+	"net"
+	"net/http"
+	"net/url"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"code.gitea.io/git"
+	"code.gitea.io/gitea/modules/setting"
+	"github.com/Unknwon/com"
+	"github.com/stretchr/testify/assert"
+)
+
+func withKeyFile(t *testing.T, keyname string, callback func(string)) {
+	keyFile := filepath.Join(setting.AppDataPath, keyname)
+	err := exec.Command("ssh-keygen", "-f", keyFile, "-t", "rsa", "-N", "").Run()
+	assert.NoError(t, err)
+
+	//Setup ssh wrapper
+	os.Setenv("GIT_SSH_COMMAND",
+		"ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i "+
+			filepath.Join(setting.AppWorkPath, keyFile))
+	os.Setenv("GIT_SSH_VARIANT", "ssh")
+
+	callback(keyFile)
+
+	defer os.RemoveAll(keyFile)
+	defer os.RemoveAll(keyFile + ".pub")
+}
+
+func createSSHUrl(gitPath string, u *url.URL) *url.URL {
+	u2 := *u
+	u2.Scheme = "ssh"
+	u2.User = url.User("git")
+	u2.Host = fmt.Sprintf("%s:%d", setting.SSH.ListenHost, setting.SSH.ListenPort)
+	u2.Path = gitPath
+	return &u2
+}
+
+func onGiteaRun(t *testing.T, callback func(*testing.T, *url.URL)) {
+	prepareTestEnv(t)
+	s := http.Server{
+		Handler: mac,
+	}
+
+	u, err := url.Parse(setting.AppURL)
+	assert.NoError(t, err)
+	listener, err := net.Listen("tcp", u.Host)
+	assert.NoError(t, err)
+
+	defer func() {
+		ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
+		s.Shutdown(ctx)
+		cancel()
+	}()
+
+	go s.Serve(listener)
+	//Started by config go ssh.Listen(setting.SSH.ListenHost, setting.SSH.ListenPort, setting.SSH.ServerCiphers, setting.SSH.ServerKeyExchanges, setting.SSH.ServerMACs)
+
+	callback(t, u)
+}
+
+func doGitClone(dstLocalPath string, u *url.URL) func(*testing.T) {
+	return func(t *testing.T) {
+		assert.NoError(t, git.Clone(u.String(), dstLocalPath, git.CloneRepoOptions{}))
+		assert.True(t, com.IsExist(filepath.Join(dstLocalPath, "README.md")))
+	}
+}
+
+func doGitCloneFail(dstLocalPath string, u *url.URL) func(*testing.T) {
+	return func(t *testing.T) {
+		assert.Error(t, git.Clone(u.String(), dstLocalPath, git.CloneRepoOptions{}))
+		assert.False(t, com.IsExist(filepath.Join(dstLocalPath, "README.md")))
+	}
+}
+
+func doGitInitTestRepository(dstPath string) func(*testing.T) {
+	return func(t *testing.T) {
+		// Init repository in dstPath
+		assert.NoError(t, git.InitRepository(dstPath, false))
+		assert.NoError(t, ioutil.WriteFile(filepath.Join(dstPath, "README.md"), []byte(fmt.Sprintf("# Testing Repository\n\nOriginally created in: %s", dstPath)), 0644))
+		assert.NoError(t, git.AddChanges(dstPath, true))
+		signature := git.Signature{
+			Email: "test@example.com",
+			Name:  "test",
+			When:  time.Now(),
+		}
+		assert.NoError(t, git.CommitChanges(dstPath, git.CommitChangesOptions{
+			Committer: &signature,
+			Author:    &signature,
+			Message:   "Initial Commit",
+		}))
+	}
+}
+
+func doGitAddRemote(dstPath, remoteName string, u *url.URL) func(*testing.T) {
+	return func(t *testing.T) {
+		_, err := git.NewCommand("remote", "add", remoteName, u.String()).RunInDir(dstPath)
+		assert.NoError(t, err)
+	}
+}
+
+func doGitPushTestRepository(dstPath, remoteName, branch string) func(*testing.T) {
+	return func(t *testing.T) {
+		_, err := git.NewCommand("push", "-u", remoteName, branch).RunInDir(dstPath)
+		assert.NoError(t, err)
+	}
+}
+
+func doGitPushTestRepositoryFail(dstPath, remoteName, branch string) func(*testing.T) {
+	return func(t *testing.T) {
+		_, err := git.NewCommand("push", "-u", remoteName, branch).RunInDir(dstPath)
+		assert.Error(t, err)
+	}
+}
--- a/integrations/git_test.go
+++ b/integrations/git_test.go
@ -5,25 +5,17 @@
 package integrations

 import (
-	"context"
 	"crypto/rand"
 	"fmt"
 	"io/ioutil"
-	"net"
-	"net/http"
 	"net/url"
 	"os"
-	"os/exec"
 	"path/filepath"
 	"testing"
 	"time"

 	"code.gitea.io/git"
-	"code.gitea.io/gitea/models"
-	"code.gitea.io/gitea/modules/setting"
-	api "code.gitea.io/sdk/gitea"

-	"github.com/Unknwon/com"
 	"github.com/stretchr/testify/assert"
 )

@ -32,69 +24,32 @@ const (
 	bigSize    = 128 * 1024 * 1024 //128Mo
 )

-func onGiteaRun(t *testing.T, callback func(*testing.T, *url.URL)) {
-	prepareTestEnv(t)
-	s := http.Server{
-		Handler: mac,
-	}
-
-	u, err := url.Parse(setting.AppURL)
-	assert.NoError(t, err)
-	listener, err := net.Listen("tcp", u.Host)
-	assert.NoError(t, err)
-
-	defer func() {
-		ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
-		s.Shutdown(ctx)
-		cancel()
-	}()
-
-	go s.Serve(listener)
-	//Started by config go ssh.Listen(setting.SSH.ListenHost, setting.SSH.ListenPort, setting.SSH.ServerCiphers, setting.SSH.ServerKeyExchanges, setting.SSH.ServerMACs)
-
-	callback(t, u)
+func TestGit(t *testing.T) {
+	onGiteaRun(t, testGit)
 }

-func TestGit(t *testing.T) {
-	onGiteaRun(t, func(t *testing.T, u *url.URL) {
-		u.Path = "user2/repo1.git"
+func testGit(t *testing.T, u *url.URL) {
+	username := "user2"
+	baseAPITestContext := NewAPITestContext(t, username, "repo1")
+
+	u.Path = baseAPITestContext.GitPath()

 	t.Run("HTTP", func(t *testing.T) {
-			dstPath, err := ioutil.TempDir("", "repo-tmp-17")
+		httpContext := baseAPITestContext
+		httpContext.Reponame = "repo-tmp-17"
+
+		dstPath, err := ioutil.TempDir("", httpContext.Reponame)
 		assert.NoError(t, err)
 		defer os.RemoveAll(dstPath)
 		t.Run("Standard", func(t *testing.T) {
-				t.Run("CloneNoLogin", func(t *testing.T) {
-					dstLocalPath, err := ioutil.TempDir("", "repo1")
-					assert.NoError(t, err)
-					defer os.RemoveAll(dstLocalPath)
-					err = git.Clone(u.String(), dstLocalPath, git.CloneRepoOptions{})
-					assert.NoError(t, err)
-					assert.True(t, com.IsExist(filepath.Join(dstLocalPath, "README.md")))
-				})
+			ensureAnonymousClone(t, u)

-				t.Run("CreateRepo", func(t *testing.T) {
-					session := loginUser(t, "user2")
-					token := getTokenForLoggedInUser(t, session)
-					req := NewRequestWithJSON(t, "POST", "/api/v1/user/repos?token="+token, &api.CreateRepoOption{
-						AutoInit:    true,
-						Description: "Temporary repo",
-						Name:        "repo-tmp-17",
-						Private:     false,
-						Gitignores:  "",
-						License:     "WTFPL",
-						Readme:      "Default",
-					})
-					session.MakeRequest(t, req, http.StatusCreated)
-				})
+			t.Run("CreateRepo", doAPICreateRepository(httpContext, false))

-				u.Path = "user2/repo-tmp-17.git"
-				u.User = url.UserPassword("user2", userPassword)
-				t.Run("Clone", func(t *testing.T) {
-					err = git.Clone(u.String(), dstPath, git.CloneRepoOptions{})
-					assert.NoError(t, err)
-					assert.True(t, com.IsExist(filepath.Join(dstPath, "README.md")))
-				})
+			u.Path = httpContext.GitPath()
+			u.User = url.UserPassword(username, userPassword)
+
+			t.Run("Clone", doGitClone(dstPath, u))

 			t.Run("PushCommit", func(t *testing.T) {
 				t.Run("Little", func(t *testing.T) {
@ -128,64 +83,27 @@ func TestGit(t *testing.T) {
 		})
 	})
 	t.Run("SSH", func(t *testing.T) {
+		sshContext := baseAPITestContext
+		sshContext.Reponame = "repo-tmp-18"
+		keyname := "my-testing-key"
+		//Setup key the user ssh key
+		withKeyFile(t, keyname, func(keyFile string) {
+			t.Run("CreateUserKey", doAPICreateUserKey(sshContext, "test-key", keyFile))
+
 			//Setup remote link
-			u.Scheme = "ssh"
-			u.User = url.User("git")
-			u.Host = fmt.Sprintf("%s:%d", setting.SSH.ListenHost, setting.SSH.ListenPort)
-			u.Path = "user2/repo-tmp-18.git"
-
-			//Setup key
-			keyFile := filepath.Join(setting.AppDataPath, "my-testing-key")
-			err := exec.Command("ssh-keygen", "-f", keyFile, "-t", "rsa", "-N", "").Run()
-			assert.NoError(t, err)
-			defer os.RemoveAll(keyFile)
-			defer os.RemoveAll(keyFile + ".pub")
-
-			session := loginUser(t, "user1")
-			keyOwner := models.AssertExistsAndLoadBean(t, &models.User{Name: "user2"}).(*models.User)
-			token := getTokenForLoggedInUser(t, session)
-			urlStr := fmt.Sprintf("/api/v1/admin/users/%s/keys?token=%s", keyOwner.Name, token)
-
-			dataPubKey, err := ioutil.ReadFile(keyFile + ".pub")
-			assert.NoError(t, err)
-			req := NewRequestWithValues(t, "POST", urlStr, map[string]string{
-				"key":   string(dataPubKey),
-				"title": "test-key",
-			})
-			session.MakeRequest(t, req, http.StatusCreated)
-
-			//Setup ssh wrapper
-			os.Setenv("GIT_SSH_COMMAND",
-				"ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i "+
-					filepath.Join(setting.AppWorkPath, keyFile))
-			os.Setenv("GIT_SSH_VARIANT", "ssh")
+			sshURL := createSSHUrl(sshContext.GitPath(), u)

 			//Setup clone folder
-			dstPath, err := ioutil.TempDir("", "repo-tmp-18")
+			dstPath, err := ioutil.TempDir("", sshContext.Reponame)
 			assert.NoError(t, err)
 			defer os.RemoveAll(dstPath)

 			t.Run("Standard", func(t *testing.T) {
-				t.Run("CreateRepo", func(t *testing.T) {
-					session := loginUser(t, "user2")
-					token := getTokenForLoggedInUser(t, session)
-					req := NewRequestWithJSON(t, "POST", "/api/v1/user/repos?token="+token, &api.CreateRepoOption{
-						AutoInit:    true,
-						Description: "Temporary repo",
-						Name:        "repo-tmp-18",
-						Private:     false,
-						Gitignores:  "",
-						License:     "WTFPL",
-						Readme:      "Default",
-					})
-					session.MakeRequest(t, req, http.StatusCreated)
-				})
+				t.Run("CreateRepo", doAPICreateRepository(sshContext, false))
+
 				//TODO get url from api
-				t.Run("Clone", func(t *testing.T) {
-					_, err = git.NewCommand("clone").AddArguments(u.String(), dstPath).Run()
-					assert.NoError(t, err)
-					assert.True(t, com.IsExist(filepath.Join(dstPath, "README.md")))
-				})
+				t.Run("Clone", doGitClone(dstPath, sshURL))
+
 				//time.Sleep(5 * time.Minute)
 				t.Run("PushCommit", func(t *testing.T) {
 					t.Run("Little", func(t *testing.T) {
@ -217,10 +135,20 @@ func TestGit(t *testing.T) {
 					lockTest(t, u.String(), dstPath)
 				})
 			})
+
 		})
+
 	})
 }

+func ensureAnonymousClone(t *testing.T, u *url.URL) {
+	dstLocalPath, err := ioutil.TempDir("", "repo1")
+	assert.NoError(t, err)
+	defer os.RemoveAll(dstLocalPath)
+	t.Run("CloneAnonymous", doGitClone(dstLocalPath, u))
+
+}
+
 func lockTest(t *testing.T, remote, repoPath string) {
 	_, err := git.NewCommand("remote").AddArguments("set-url", "origin", remote).RunInDir(repoPath) //TODO add test ssh git-lfs-creds
 	assert.NoError(t, err)
--- a/integrations/ssh_key_test.go
+++ b/integrations/ssh_key_test.go
@ -0,0 +1,217 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package integrations
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"code.gitea.io/git"
+	api "code.gitea.io/sdk/gitea"
+	"github.com/stretchr/testify/assert"
+)
+
+func doCheckRepositoryEmptyStatus(ctx APITestContext, isEmpty bool) func(*testing.T) {
+	return doAPIGetRepository(ctx, func(t *testing.T, repository api.Repository) {
+		assert.Equal(t, isEmpty, repository.Empty)
+	})
+}
+
+func doAddChangesToCheckout(dstPath, filename string) func(*testing.T) {
+	return func(t *testing.T) {
+		assert.NoError(t, ioutil.WriteFile(filepath.Join(dstPath, filename), []byte(fmt.Sprintf("# Testing Repository\n\nOriginally created in: %s at time: %v", dstPath, time.Now())), 0644))
+		assert.NoError(t, git.AddChanges(dstPath, true))
+		signature := git.Signature{
+			Email: "test@example.com",
+			Name:  "test",
+			When:  time.Now(),
+		}
+		assert.NoError(t, git.CommitChanges(dstPath, git.CommitChangesOptions{
+			Committer: &signature,
+			Author:    &signature,
+			Message:   "Initial Commit",
+		}))
+	}
+}
+
+func TestPushDeployKeyOnEmptyRepo(t *testing.T) {
+	onGiteaRun(t, testPushDeployKeyOnEmptyRepo)
+}
+
+func testPushDeployKeyOnEmptyRepo(t *testing.T, u *url.URL) {
+	// OK login
+	ctx := NewAPITestContext(t, "user2", "deploy-key-empty-repo-1")
+	keyname := fmt.Sprintf("%s-push", ctx.Reponame)
+	u.Path = ctx.GitPath()
+
+	t.Run("CreateEmptyRepository", doAPICreateRepository(ctx, true))
+
+	t.Run("CheckIsEmpty", doCheckRepositoryEmptyStatus(ctx, true))
+
+	withKeyFile(t, keyname, func(keyFile string) {
+		t.Run("CreatePushDeployKey", doAPICreateDeployKey(ctx, keyname, keyFile, false))
+
+		// Setup the testing repository
+		dstPath, err := ioutil.TempDir("", "repo-tmp-deploy-key-empty-repo-1")
+		assert.NoError(t, err)
+		defer os.RemoveAll(dstPath)
+
+		t.Run("InitTestRepository", doGitInitTestRepository(dstPath))
+
+		//Setup remote link
+		sshURL := createSSHUrl(ctx.GitPath(), u)
+
+		t.Run("AddRemote", doGitAddRemote(dstPath, "origin", sshURL))
+
+		t.Run("SSHPushTestRepository", doGitPushTestRepository(dstPath, "origin", "master"))
+
+		t.Run("CheckIsNotEmpty", doCheckRepositoryEmptyStatus(ctx, false))
+
+		t.Run("DeleteRepository", doAPIDeleteRepository(ctx))
+	})
+}
+
+func TestKeyOnlyOneType(t *testing.T) {
+	onGiteaRun(t, testKeyOnlyOneType)
+}
+
+func testKeyOnlyOneType(t *testing.T, u *url.URL) {
+	// Once a key is a user key we cannot use it as a deploy key
+	// If we delete it from the user we should be able to use it as a deploy key
+	reponame := "ssh-key-test-repo"
+	username := "user2"
+	u.Path = fmt.Sprintf("%s/%s.git", username, reponame)
+	keyname := fmt.Sprintf("%s-push", reponame)
+
+	// OK login
+	ctx := NewAPITestContext(t, username, reponame)
+
+	otherCtx := ctx
+	otherCtx.Reponame = "ssh-key-test-repo-2"
+
+	failCtx := ctx
+	failCtx.ExpectedCode = http.StatusUnprocessableEntity
+
+	t.Run("CreateRepository", doAPICreateRepository(ctx, false))
+	t.Run("CreateOtherRepository", doAPICreateRepository(otherCtx, false))
+
+	withKeyFile(t, keyname, func(keyFile string) {
+		var userKeyPublicKeyID int64
+		t.Run("KeyCanOnlyBeUser", func(t *testing.T) {
+			dstPath, err := ioutil.TempDir("", ctx.Reponame)
+			assert.NoError(t, err)
+			defer os.RemoveAll(dstPath)
+
+			sshURL := createSSHUrl(ctx.GitPath(), u)
+
+			t.Run("FailToClone", doGitCloneFail(dstPath, sshURL))
+
+			t.Run("CreateUserKey", doAPICreateUserKey(ctx, keyname, keyFile, func(t *testing.T, publicKey api.PublicKey) {
+				userKeyPublicKeyID = publicKey.ID
+			}))
+
+			t.Run("FailToAddReadOnlyDeployKey", doAPICreateDeployKey(failCtx, keyname, keyFile, true))
+
+			t.Run("FailToAddDeployKey", doAPICreateDeployKey(failCtx, keyname, keyFile, false))
+
+			t.Run("Clone", doGitClone(dstPath, sshURL))
+
+			t.Run("AddChanges", doAddChangesToCheckout(dstPath, "CHANGES1.md"))
+
+			t.Run("Push", doGitPushTestRepository(dstPath, "origin", "master"))
+
+			t.Run("DeleteUserKey", doAPIDeleteUserKey(ctx, userKeyPublicKeyID))
+		})
+
+		t.Run("KeyCanBeAnyDeployButNotUserAswell", func(t *testing.T) {
+			dstPath, err := ioutil.TempDir("", ctx.Reponame)
+			assert.NoError(t, err)
+			defer os.RemoveAll(dstPath)
+
+			sshURL := createSSHUrl(ctx.GitPath(), u)
+
+			t.Run("FailToClone", doGitCloneFail(dstPath, sshURL))
+
+			// Should now be able to add...
+			t.Run("AddReadOnlyDeployKey", doAPICreateDeployKey(ctx, keyname, keyFile, true))
+
+			t.Run("Clone", doGitClone(dstPath, sshURL))
+
+			t.Run("AddChanges", doAddChangesToCheckout(dstPath, "CHANGES2.md"))
+
+			t.Run("FailToPush", doGitPushTestRepositoryFail(dstPath, "origin", "master"))
+
+			otherSSHURL := createSSHUrl(otherCtx.GitPath(), u)
+			dstOtherPath, err := ioutil.TempDir("", otherCtx.Reponame)
+			assert.NoError(t, err)
+			defer os.RemoveAll(dstOtherPath)
+
+			t.Run("AddWriterDeployKeyToOther", doAPICreateDeployKey(otherCtx, keyname, keyFile, false))
+
+			t.Run("CloneOther", doGitClone(dstOtherPath, otherSSHURL))
+
+			t.Run("AddChangesToOther", doAddChangesToCheckout(dstOtherPath, "CHANGES3.md"))
+
+			t.Run("PushToOther", doGitPushTestRepository(dstOtherPath, "origin", "master"))
+
+			t.Run("FailToCreateUserKey", doAPICreateUserKey(failCtx, keyname, keyFile))
+		})
+
+		t.Run("DeleteRepositoryShouldReleaseKey", func(t *testing.T) {
+			otherSSHURL := createSSHUrl(otherCtx.GitPath(), u)
+			dstOtherPath, err := ioutil.TempDir("", otherCtx.Reponame)
+			assert.NoError(t, err)
+			defer os.RemoveAll(dstOtherPath)
+
+			t.Run("DeleteRepository", doAPIDeleteRepository(ctx))
+
+			t.Run("FailToCreateUserKeyAsStillDeploy", doAPICreateUserKey(failCtx, keyname, keyFile))
+
+			t.Run("MakeSureCloneOtherStillWorks", doGitClone(dstOtherPath, otherSSHURL))
+
+			t.Run("AddChangesToOther", doAddChangesToCheckout(dstOtherPath, "CHANGES3.md"))
+
+			t.Run("PushToOther", doGitPushTestRepository(dstOtherPath, "origin", "master"))
+
+			t.Run("DeleteOtherRepository", doAPIDeleteRepository(otherCtx))
+
+			t.Run("RecreateRepository", doAPICreateRepository(ctx, false))
+
+			t.Run("CreateUserKey", doAPICreateUserKey(ctx, keyname, keyFile, func(t *testing.T, publicKey api.PublicKey) {
+				userKeyPublicKeyID = publicKey.ID
+			}))
+
+			dstPath, err := ioutil.TempDir("", ctx.Reponame)
+			assert.NoError(t, err)
+			defer os.RemoveAll(dstPath)
+
+			sshURL := createSSHUrl(ctx.GitPath(), u)
+
+			t.Run("Clone", doGitClone(dstPath, sshURL))
+
+			t.Run("AddChanges", doAddChangesToCheckout(dstPath, "CHANGES1.md"))
+
+			t.Run("Push", doGitPushTestRepository(dstPath, "origin", "master"))
+		})
+
+		t.Run("DeleteUserKeyShouldRemoveAbilityToClone", func(t *testing.T) {
+			dstPath, err := ioutil.TempDir("", ctx.Reponame)
+			assert.NoError(t, err)
+			defer os.RemoveAll(dstPath)
+
+			sshURL := createSSHUrl(ctx.GitPath(), u)
+
+			t.Run("DeleteUserKey", doAPIDeleteUserKey(ctx, userKeyPublicKeyID))
+
+			t.Run("FailToClone", doGitCloneFail(dstPath, sshURL))
+		})
+	})
+}
--- a/models/repo.go
+++ b/models/repo.go
@ -1756,6 +1756,17 @@ func DeleteRepository(doer *User, uid, repoID int64) error {
 		return ErrRepoNotExist{repoID, uid, "", ""}
 	}

+	// Delete Deploy Keys
+	deployKeys, err := listDeployKeys(sess, repo.ID)
+	if err != nil {
+		return fmt.Errorf("listDeployKeys: %v", err)
+	}
+	for _, dKey := range deployKeys {
+		if err := deleteDeployKey(sess, doer, dKey.ID); err != nil {
+			return fmt.Errorf("deleteDeployKeys: %v", err)
+		}
+	}
+
 	if cnt, err := sess.ID(repoID).Delete(&Repository{}); err != nil {
 		return err
 	} else if cnt != 1 {
@ -1898,6 +1909,12 @@ func DeleteRepository(doer *User, uid, repoID int64) error {
 	}

 	if err = sess.Commit(); err != nil {
+		if len(deployKeys) > 0 {
+			// We need to rewrite the public keys because the commit failed
+			if err2 := RewriteAllPublicKeys(); err2 != nil {
+				return fmt.Errorf("Commit: %v SSH Keys: %v", err, err2)
+			}
+		}
 		return fmt.Errorf("Commit: %v", err)
 	}

--- a/models/ssh_key.go
+++ b/models/ssh_key.go
@ -51,7 +51,7 @@ type PublicKey struct {
 	ID            int64      `xorm:"pk autoincr"`
 	OwnerID       int64      `xorm:"INDEX NOT NULL"`
 	Name          string     `xorm:"NOT NULL"`
-	Fingerprint   string     `xorm:"NOT NULL"`
+	Fingerprint   string     `xorm:"INDEX NOT NULL"`
 	Content       string     `xorm:"TEXT NOT NULL"`
 	Mode          AccessMode `xorm:"NOT NULL DEFAULT 2"`
 	Type          KeyType    `xorm:"NOT NULL DEFAULT 1"`
@ -350,7 +350,6 @@ func appendAuthorizedKeysToFile(keys ...*PublicKey) error {
 func checkKeyFingerprint(e Engine, fingerprint string) error {
 	has, err := e.Get(&PublicKey{
 		Fingerprint: fingerprint,
-		Type:        KeyTypeUser,
 	})
 	if err != nil {
 		return err
@ -401,12 +400,18 @@ func AddPublicKey(ownerID int64, name, content string, LoginSourceID int64) (*Pu
 		return nil, err
 	}

-	if err := checkKeyFingerprint(x, fingerprint); err != nil {
+	sess := x.NewSession()
+	defer sess.Close()
+	if err = sess.Begin(); err != nil {
+		return nil, err
+	}
+
+	if err := checkKeyFingerprint(sess, fingerprint); err != nil {
 		return nil, err
 	}

 	// Key name of same user cannot be duplicated.
-	has, err := x.
+	has, err := sess.
 		Where("owner_id = ? AND name = ?", ownerID, name).
 		Get(new(PublicKey))
 	if err != nil {
@ -415,12 +420,6 @@ func AddPublicKey(ownerID int64, name, content string, LoginSourceID int64) (*Pu
 		return nil, ErrKeyNameAlreadyUsed{ownerID, name}
 	}

-	sess := x.NewSession()
-	defer sess.Close()
-	if err = sess.Begin(); err != nil {
-		return nil, err
-	}
-
 	key := &PublicKey{
 		OwnerID:       ownerID,
 		Name:          name,
@ -519,7 +518,7 @@ func UpdatePublicKeyUpdated(id int64) error {
 }

 // deletePublicKeys does the actual key deletion but does not update authorized_keys file.
-func deletePublicKeys(e *xorm.Session, keyIDs ...int64) error {
+func deletePublicKeys(e Engine, keyIDs ...int64) error {
 	if len(keyIDs) == 0 {
 		return nil
 	}
@ -728,24 +727,28 @@ func AddDeployKey(repoID int64, name, content string, readOnly bool) (*DeployKey
 		accessMode = AccessModeWrite
 	}

-	pkey := &PublicKey{
-		Fingerprint: fingerprint,
-		Mode:        accessMode,
-		Type:        KeyTypeDeploy,
-	}
-	has, err := x.Get(pkey)
-	if err != nil {
-		return nil, err
-	}
-
 	sess := x.NewSession()
 	defer sess.Close()
 	if err = sess.Begin(); err != nil {
 		return nil, err
 	}

+	pkey := &PublicKey{
+		Fingerprint: fingerprint,
+	}
+	has, err := sess.Get(pkey)
+	if err != nil {
+		return nil, err
+	}
+
+	if has {
+		if pkey.Type != KeyTypeDeploy {
+			return nil, ErrKeyAlreadyExist{0, fingerprint, ""}
+		}
+	} else {
 		// First time use this deploy key.
-	if !has {
+		pkey.Mode = accessMode
+		pkey.Type = KeyTypeDeploy
 		pkey.Content = content
 		pkey.Name = name
 		if err = addKey(sess, pkey); err != nil {
@ -763,8 +766,12 @@ func AddDeployKey(repoID int64, name, content string, readOnly bool) (*DeployKey

 // GetDeployKeyByID returns deploy key by given ID.
 func GetDeployKeyByID(id int64) (*DeployKey, error) {
+	return getDeployKeyByID(x, id)
+}
+
+func getDeployKeyByID(e Engine, id int64) (*DeployKey, error) {
 	key := new(DeployKey)
-	has, err := x.ID(id).Get(key)
+	has, err := e.ID(id).Get(key)
 	if err != nil {
 		return nil, err
 	} else if !has {
@ -775,11 +782,15 @@ func GetDeployKeyByID(id int64) (*DeployKey, error) {

 // GetDeployKeyByRepo returns deploy key by given public key ID and repository ID.
 func GetDeployKeyByRepo(keyID, repoID int64) (*DeployKey, error) {
+	return getDeployKeyByRepo(x, keyID, repoID)
+}
+
+func getDeployKeyByRepo(e Engine, keyID, repoID int64) (*DeployKey, error) {
 	key := &DeployKey{
 		KeyID:  keyID,
 		RepoID: repoID,
 	}
-	has, err := x.Get(key)
+	has, err := e.Get(key)
 	if err != nil {
 		return nil, err
 	} else if !has {
@ -802,7 +813,19 @@ func UpdateDeployKey(key *DeployKey) error {

 // DeleteDeployKey deletes deploy key from its repository authorized_keys file if needed.
 func DeleteDeployKey(doer *User, id int64) error {
-	key, err := GetDeployKeyByID(id)
+	sess := x.NewSession()
+	defer sess.Close()
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+	if err := deleteDeployKey(sess, doer, id); err != nil {
+		return err
+	}
+	return sess.Commit()
+}
+
+func deleteDeployKey(sess Engine, doer *User, id int64) error {
+	key, err := getDeployKeyByID(sess, id)
 	if err != nil {
 		if IsErrDeployKeyNotExist(err) {
 			return nil
@ -812,11 +835,11 @@ func DeleteDeployKey(doer *User, id int64) error {

 	// Check if user has access to delete this key.
 	if !doer.IsAdmin {
-		repo, err := GetRepositoryByID(key.RepoID)
+		repo, err := getRepositoryByID(sess, key.RepoID)
 		if err != nil {
 			return fmt.Errorf("GetRepositoryByID: %v", err)
 		}
-		has, err := IsUserRepoAdmin(repo, doer)
+		has, err := isUserRepoAdmin(sess, repo, doer)
 		if err != nil {
 			return fmt.Errorf("GetUserRepoPermission: %v", err)
 		} else if !has {
@ -824,12 +847,6 @@ func DeleteDeployKey(doer *User, id int64) error {
 		}
 	}

-	sess := x.NewSession()
-	defer sess.Close()
-	if err = sess.Begin(); err != nil {
-		return err
-	}
-
 	if _, err = sess.ID(key.ID).Delete(new(DeployKey)); err != nil {
 		return fmt.Errorf("delete deploy key [%d]: %v", key.ID, err)
 	}
@ -851,13 +868,17 @@ func DeleteDeployKey(doer *User, id int64) error {
 		}
 	}

-	return sess.Commit()
+	return nil
 }

 // ListDeployKeys returns all deploy keys by given repository ID.
 func ListDeployKeys(repoID int64) ([]*DeployKey, error) {
+	return listDeployKeys(x, repoID)
+}
+
+func listDeployKeys(e Engine, repoID int64) ([]*DeployKey, error) {
 	keys := make([]*DeployKey, 0, 5)
-	return keys, x.
+	return keys, e.
 		Where("repo_id = ?", repoID).
 		Find(&keys)
 }
--- a/modules/private/key.go
+++ b/modules/private/key.go
@ -32,6 +32,31 @@ func UpdateDeployKeyUpdated(keyID int64, repoID int64) error {
 	return nil
 }

+// GetDeployKey check if repo has deploy key
+func GetDeployKey(keyID, repoID int64) (*models.DeployKey, error) {
+	reqURL := setting.LocalURL + fmt.Sprintf("api/internal/repositories/%d/keys/%d", repoID, keyID)
+	log.GitLogger.Trace("GetDeployKey: %s", reqURL)
+
+	resp, err := newInternalRequest(reqURL, "GET").Response()
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	switch resp.StatusCode {
+	case 404:
+		return nil, nil
+	case 200:
+		var dKey models.DeployKey
+		if err := json.NewDecoder(resp.Body).Decode(&dKey); err != nil {
+			return nil, err
+		}
+		return &dKey, nil
+	default:
+		return nil, fmt.Errorf("Failed to get deploy key: %s", decodeJSONError(resp).Err)
+	}
+}
+
 // HasDeployKey check if repo has deploy key
 func HasDeployKey(keyID, repoID int64) (bool, error) {
 	reqURL := setting.LocalURL + fmt.Sprintf("api/internal/repositories/%d/has-keys/%d", repoID, keyID)
--- a/options/locale/locale_en-US.ini
+++ b/options/locale/locale_en-US.ini
@ -419,7 +419,7 @@ ssh_helper = <strong>Need help?</strong> Have a look at GitHub's guide to <a hre
 gpg_helper = <strong>Need help?</strong> Have a look at GitHub's guide <a href="%s">about GPG</a>.
 add_new_key = Add SSH Key
 add_new_gpg_key = Add GPG Key
-ssh_key_been_used = This SSH key is already added to your account.
+ssh_key_been_used = This SSH key has already been added to the server.
 ssh_key_name_used = An SSH key with same name is already added to your account.
 gpg_key_id_used = A public GPG key with same ID already exists.
 gpg_no_key_email_found = This GPG key is not usable with any email address associated with your account.
--- a/routers/api/v1/repo/key.go
+++ b/routers/api/v1/repo/key.go
@ -159,6 +159,8 @@ func HandleCheckKeyStringError(ctx *context.APIContext, err error) {
 // HandleAddKeyError handle add key error
 func HandleAddKeyError(ctx *context.APIContext, err error) {
 	switch {
+	case models.IsErrDeployKeyAlreadyExist(err):
+		ctx.Error(422, "", "This key has already been added to this repository")
 	case models.IsErrKeyAlreadyExist(err):
 		ctx.Error(422, "", "Key content has been used as non-deploy key")
 	case models.IsErrKeyNameAlreadyUsed(err):
--- a/routers/private/internal.go
+++ b/routers/private/internal.go
@ -82,6 +82,7 @@ func RegisterRoutes(m *macaron.Macaron) {
 		m.Post("/repositories/:repoid/keys/:keyid/update", UpdateDeployKey)
 		m.Get("/repositories/:repoid/user/:userid/checkunituser", CheckUnitUser)
 		m.Get("/repositories/:repoid/has-keys/:keyid", HasDeployKey)
+		m.Get("/repositories/:repoid/keys/:keyid", GetDeployKey)
 		m.Get("/repositories/:repoid/wiki/init", InitWiki)
 		m.Post("/push/update", PushUpdate)
 		m.Get("/protectedbranch/:pbid/:userid", CanUserPush)
--- a/routers/private/key.go
+++ b/routers/private/key.go
@ -72,6 +72,24 @@ func GetUserByKeyID(ctx *macaron.Context) {
 	ctx.JSON(200, user)
 }

+//GetDeployKey chainload to models.GetDeployKey
+func GetDeployKey(ctx *macaron.Context) {
+	repoID := ctx.ParamsInt64(":repoid")
+	keyID := ctx.ParamsInt64(":keyid")
+	dKey, err := models.GetDeployKeyByRepo(keyID, repoID)
+	if err != nil {
+		if models.IsErrDeployKeyNotExist(err) {
+			ctx.JSON(404, []byte("not found"))
+			return
+		}
+		ctx.JSON(500, map[string]interface{}{
+			"err": err.Error(),
+		})
+		return
+	}
+	ctx.JSON(200, dKey)
+}
+
 //HasDeployKey chainload to models.HasDeployKey
 func HasDeployKey(ctx *macaron.Context) {
 	repoID := ctx.ParamsInt64(":repoid")
--- a/routers/repo/setting.go
+++ b/routers/repo/setting.go
@ -622,6 +622,9 @@ func DeployKeysPost(ctx *context.Context, form auth.AddKeyForm) {
 		case models.IsErrDeployKeyAlreadyExist(err):
 			ctx.Data["Err_Content"] = true
 			ctx.RenderWithErr(ctx.Tr("repo.settings.key_been_used"), tplDeployKeys, &form)
+		case models.IsErrKeyAlreadyExist(err):
+			ctx.Data["Err_Content"] = true
+			ctx.RenderWithErr(ctx.Tr("settings.ssh_key_been_used"), tplDeployKeys, &form)
 		case models.IsErrKeyNameAlreadyUsed(err):
 			ctx.Data["Err_Title"] = true
 			ctx.RenderWithErr(ctx.Tr("repo.settings.key_name_used"), tplDeployKeys, &form)