fcb535c5c3
This PR fixes #7598 by providing a configurable way of signing commits across the Gitea instance. Per repository configurability and import/generation of trusted secure keys is not provided by this PR - from a security PoV that's probably impossible to do properly. Similarly web-signing, that is asking the user to sign something, is not implemented - this could be done at a later stage however. ## Features - [x] If commit.gpgsign is set in .gitconfig sign commits and files created through repofiles. (merges should already have been signed.) - [x] Verify commits signed with the default gpg as valid - [x] Signer, Committer and Author can all be different - [x] Allow signer to be arbitrarily different - We still require the key to have an activated email on Gitea. A more complete implementation would be to use a keyserver and mark external-or-unactivated with an "unknown" trust level icon. - [x] Add a signing-key.gpg endpoint to get the default gpg pub key if available - Rather than add a fake web-flow user I've added this as an endpoint on /api/v1/signing-key.gpg - [x] Try to match the default key with a user on gitea - this is done at verification time - [x] Make things configurable? - app.ini configuration done - [x] when checking commits are signed need to check if they're actually verifiable too - [x] Add documentation I have decided that adjusting the docker to create a default gpg key is not the correct thing to do and therefore have not implemented this.
252 lines
10 KiB
Go
252 lines
10 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package integrations
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import (
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"encoding/base64"
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"fmt"
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"io/ioutil"
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"net/url"
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"os"
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"path/filepath"
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"testing"
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"code.gitea.io/gitea/models"
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"code.gitea.io/gitea/modules/process"
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"code.gitea.io/gitea/modules/setting"
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api "code.gitea.io/gitea/modules/structs"
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"github.com/stretchr/testify/assert"
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"golang.org/x/crypto/openpgp"
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"golang.org/x/crypto/openpgp/armor"
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)
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func TestGPGGit(t *testing.T) {
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onGiteaRun(t, testGPGGit)
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}
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func testGPGGit(t *testing.T, u *url.URL) {
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username := "user2"
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baseAPITestContext := NewAPITestContext(t, username, "repo1")
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u.Path = baseAPITestContext.GitPath()
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// OK Set a new GPG home
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tmpDir, err := ioutil.TempDir("", "temp-gpg")
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assert.NoError(t, err)
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defer os.RemoveAll(tmpDir)
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err = os.Chmod(tmpDir, 0700)
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assert.NoError(t, err)
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oldGNUPGHome := os.Getenv("GNUPGHOME")
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err = os.Setenv("GNUPGHOME", tmpDir)
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assert.NoError(t, err)
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defer os.Setenv("GNUPGHOME", oldGNUPGHome)
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// Need to create a root key
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rootKeyPair, err := createGPGKey(tmpDir, "gitea", "gitea@fake.local")
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assert.NoError(t, err)
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rootKeyID := rootKeyPair.PrimaryKey.KeyIdShortString()
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oldKeyID := setting.Repository.Signing.SigningKey
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oldName := setting.Repository.Signing.SigningName
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oldEmail := setting.Repository.Signing.SigningEmail
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defer func() {
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setting.Repository.Signing.SigningKey = oldKeyID
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setting.Repository.Signing.SigningName = oldName
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setting.Repository.Signing.SigningEmail = oldEmail
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}()
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setting.Repository.Signing.SigningKey = rootKeyID
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setting.Repository.Signing.SigningName = "gitea"
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setting.Repository.Signing.SigningEmail = "gitea@fake.local"
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user := models.AssertExistsAndLoadBean(t, &models.User{Name: username}).(*models.User)
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t.Run("Unsigned-Initial", func(t *testing.T) {
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PrintCurrentTest(t)
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setting.Repository.Signing.InitialCommit = []string{"never"}
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testCtx := NewAPITestContext(t, username, "initial-unsigned")
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t.Run("CreateRepository", doAPICreateRepository(testCtx, false))
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t.Run("CheckMasterBranchUnsigned", doAPIGetBranch(testCtx, "master", func(t *testing.T, branch api.Branch) {
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assert.NotNil(t, branch.Commit)
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assert.NotNil(t, branch.Commit.Verification)
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assert.False(t, branch.Commit.Verification.Verified)
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assert.Empty(t, branch.Commit.Verification.Signature)
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}))
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setting.Repository.Signing.CRUDActions = []string{"never"}
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t.Run("CreateCRUDFile-Never", crudActionCreateFile(
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t, testCtx, user, "master", "never", "unsigned-never.txt", func(t *testing.T, response api.FileResponse) {
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assert.False(t, response.Verification.Verified)
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}))
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t.Run("CreateCRUDFile-Never", crudActionCreateFile(
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t, testCtx, user, "never", "never2", "unsigned-never2.txt", func(t *testing.T, response api.FileResponse) {
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assert.False(t, response.Verification.Verified)
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}))
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setting.Repository.Signing.CRUDActions = []string{"parentsigned"}
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t.Run("CreateCRUDFile-ParentSigned", crudActionCreateFile(
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t, testCtx, user, "master", "parentsigned", "signed-parent.txt", func(t *testing.T, response api.FileResponse) {
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assert.False(t, response.Verification.Verified)
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}))
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t.Run("CreateCRUDFile-ParentSigned", crudActionCreateFile(
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t, testCtx, user, "parentsigned", "parentsigned2", "signed-parent2.txt", func(t *testing.T, response api.FileResponse) {
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assert.False(t, response.Verification.Verified)
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}))
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setting.Repository.Signing.CRUDActions = []string{"never"}
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t.Run("CreateCRUDFile-Never", crudActionCreateFile(
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t, testCtx, user, "parentsigned", "parentsigned-never", "unsigned-never2.txt", func(t *testing.T, response api.FileResponse) {
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assert.False(t, response.Verification.Verified)
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}))
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setting.Repository.Signing.CRUDActions = []string{"always"}
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t.Run("CreateCRUDFile-Always", crudActionCreateFile(
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t, testCtx, user, "master", "always", "signed-always.txt", func(t *testing.T, response api.FileResponse) {
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assert.True(t, response.Verification.Verified)
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assert.Equal(t, "gitea@fake.local", response.Verification.Signer.Email)
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}))
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t.Run("CreateCRUDFile-ParentSigned-always", crudActionCreateFile(
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t, testCtx, user, "parentsigned", "parentsigned-always", "signed-parent2.txt", func(t *testing.T, response api.FileResponse) {
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assert.True(t, response.Verification.Verified)
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assert.Equal(t, "gitea@fake.local", response.Verification.Signer.Email)
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}))
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setting.Repository.Signing.CRUDActions = []string{"parentsigned"}
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t.Run("CreateCRUDFile-Always-ParentSigned", crudActionCreateFile(
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t, testCtx, user, "always", "always-parentsigned", "signed-always-parentsigned.txt", func(t *testing.T, response api.FileResponse) {
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assert.True(t, response.Verification.Verified)
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assert.Equal(t, "gitea@fake.local", response.Verification.Signer.Email)
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}))
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})
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t.Run("AlwaysSign-Initial", func(t *testing.T) {
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PrintCurrentTest(t)
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setting.Repository.Signing.InitialCommit = []string{"always"}
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testCtx := NewAPITestContext(t, username, "initial-always")
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t.Run("CreateRepository", doAPICreateRepository(testCtx, false))
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t.Run("CheckMasterBranchSigned", doAPIGetBranch(testCtx, "master", func(t *testing.T, branch api.Branch) {
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assert.NotNil(t, branch.Commit)
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assert.NotNil(t, branch.Commit.Verification)
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assert.True(t, branch.Commit.Verification.Verified)
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assert.Equal(t, "gitea@fake.local", branch.Commit.Verification.Signer.Email)
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}))
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setting.Repository.Signing.CRUDActions = []string{"never"}
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t.Run("CreateCRUDFile-Never", crudActionCreateFile(
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t, testCtx, user, "master", "never", "unsigned-never.txt", func(t *testing.T, response api.FileResponse) {
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assert.False(t, response.Verification.Verified)
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}))
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setting.Repository.Signing.CRUDActions = []string{"parentsigned"}
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t.Run("CreateCRUDFile-ParentSigned", crudActionCreateFile(
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t, testCtx, user, "master", "parentsigned", "signed-parent.txt", func(t *testing.T, response api.FileResponse) {
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assert.True(t, response.Verification.Verified)
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assert.Equal(t, "gitea@fake.local", response.Verification.Signer.Email)
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}))
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setting.Repository.Signing.CRUDActions = []string{"always"}
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t.Run("CreateCRUDFile-Always", crudActionCreateFile(
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t, testCtx, user, "master", "always", "signed-always.txt", func(t *testing.T, response api.FileResponse) {
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assert.True(t, response.Verification.Verified)
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assert.Equal(t, "gitea@fake.local", response.Verification.Signer.Email)
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}))
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})
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t.Run("UnsignedMerging", func(t *testing.T) {
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PrintCurrentTest(t)
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testCtx := NewAPITestContext(t, username, "initial-unsigned")
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var pr api.PullRequest
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var err error
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t.Run("CreatePullRequest", func(t *testing.T) {
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pr, err = doAPICreatePullRequest(testCtx, testCtx.Username, testCtx.Reponame, "master", "never2")(t)
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assert.NoError(t, err)
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})
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setting.Repository.Signing.Merges = []string{"commitssigned"}
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t.Run("MergePR", doAPIMergePullRequest(testCtx, testCtx.Username, testCtx.Reponame, pr.Index))
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t.Run("CheckMasterBranchUnsigned", doAPIGetBranch(testCtx, "master", func(t *testing.T, branch api.Branch) {
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assert.NotNil(t, branch.Commit)
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assert.NotNil(t, branch.Commit.Verification)
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assert.False(t, branch.Commit.Verification.Verified)
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assert.Empty(t, branch.Commit.Verification.Signature)
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}))
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setting.Repository.Signing.Merges = []string{"basesigned"}
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t.Run("CreatePullRequest", func(t *testing.T) {
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pr, err = doAPICreatePullRequest(testCtx, testCtx.Username, testCtx.Reponame, "master", "parentsigned2")(t)
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assert.NoError(t, err)
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})
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t.Run("MergePR", doAPIMergePullRequest(testCtx, testCtx.Username, testCtx.Reponame, pr.Index))
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t.Run("CheckMasterBranchUnsigned", doAPIGetBranch(testCtx, "master", func(t *testing.T, branch api.Branch) {
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assert.NotNil(t, branch.Commit)
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assert.NotNil(t, branch.Commit.Verification)
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assert.False(t, branch.Commit.Verification.Verified)
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assert.Empty(t, branch.Commit.Verification.Signature)
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}))
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setting.Repository.Signing.Merges = []string{"commitssigned"}
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t.Run("CreatePullRequest", func(t *testing.T) {
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pr, err = doAPICreatePullRequest(testCtx, testCtx.Username, testCtx.Reponame, "master", "always-parentsigned")(t)
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assert.NoError(t, err)
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})
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t.Run("MergePR", doAPIMergePullRequest(testCtx, testCtx.Username, testCtx.Reponame, pr.Index))
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t.Run("CheckMasterBranchUnsigned", doAPIGetBranch(testCtx, "master", func(t *testing.T, branch api.Branch) {
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assert.NotNil(t, branch.Commit)
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assert.NotNil(t, branch.Commit.Verification)
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assert.True(t, branch.Commit.Verification.Verified)
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}))
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})
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}
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func crudActionCreateFile(t *testing.T, ctx APITestContext, user *models.User, from, to, path string, callback ...func(*testing.T, api.FileResponse)) func(*testing.T) {
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return doAPICreateFile(ctx, path, &api.CreateFileOptions{
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FileOptions: api.FileOptions{
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BranchName: from,
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NewBranchName: to,
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Message: fmt.Sprintf("from:%s to:%s path:%s", from, to, path),
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Author: api.Identity{
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Name: user.FullName,
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Email: user.Email,
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},
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Committer: api.Identity{
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Name: user.FullName,
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Email: user.Email,
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},
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},
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Content: base64.StdEncoding.EncodeToString([]byte("This is new text")),
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}, callback...)
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}
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func createGPGKey(tmpDir, name, email string) (*openpgp.Entity, error) {
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keyPair, err := openpgp.NewEntity(name, "test", email, nil)
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if err != nil {
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return nil, err
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}
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for _, id := range keyPair.Identities {
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err := id.SelfSignature.SignUserId(id.UserId.Id, keyPair.PrimaryKey, keyPair.PrivateKey, nil)
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if err != nil {
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return nil, err
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}
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}
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keyFile := filepath.Join(tmpDir, "temporary.key")
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keyWriter, err := os.Create(keyFile)
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if err != nil {
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return nil, err
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}
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defer keyWriter.Close()
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defer os.Remove(keyFile)
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w, err := armor.Encode(keyWriter, openpgp.PrivateKeyType, nil)
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if err != nil {
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return nil, err
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}
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defer w.Close()
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keyPair.SerializePrivate(w, nil)
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if err := w.Close(); err != nil {
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return nil, err
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}
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if err := keyWriter.Close(); err != nil {
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return nil, err
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}
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if _, _, err := process.GetManager().Exec("gpg --import temporary.key", "gpg", "--import", keyFile); err != nil {
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return nil, err
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}
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return keyPair, nil
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}
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