1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
8. 8
9. 9
10. 10
11. 11
12. 12
13. 13
14. 14
15. 15
16. 16
17. 17
18. 18
19. 19
20. 20
21. 21
22. 22
23. 23
24. 24
25. 25
26. 26
27. 27
28. 28
29. 29
30. 30
31. 31
32. 32
33. 33
34. 34
35. 35
36. 36
37. 37
38. 38
39. 39
40. 40
41. 41
42. 42
43. 43
44. 44
45. 45
46. 46
47. 47
48. 48
49. 49
50. 50
51. 51
52. 52
53. 53
54. 54
55. 55
56. 56
57. 57
58. 58
59. 59
60. 60
61. 61
62. 62
63. 63
64. 64
65. 65
66. 66
67. 67
68. 68
69. 69
70. 70
71. 71
72. 72
73. 73
74. 74
75. 75
76. 76
77. 77
78. 78
79. 79
80. 80
81. 81
82. 82
83. 83
84. 84
85. 85
86. 86
87. 87
88. 88
89. 89
90. 90
91. 91
92. 92
93. 93
94. 94
95. 95
96. 96
97. 97
98. 98
99. 99
100. 100
101. 101
102. 102
103. 103
104. 104
105. 105
106. 106
107. 107
108. 108
109. 109
110. 110
111. 111
112. 112
113. 113
114. 114
115. 115
116. 116
117. 117
118. 118
119. 119
120. 120
121. 121
122. 122
123. 123
124. 124
125. 125
126. 126
127. 127
128. 128
129. 129
130. 130
131. 131
132. 132
133. 133

// 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 models

import (
	"code.gitea.io/gitea/models/db"
	"code.gitea.io/gitea/models/login"
	user_model "code.gitea.io/gitea/models/user"
	"code.gitea.io/gitea/modules/git"
	"code.gitea.io/gitea/modules/log"
	"code.gitea.io/gitea/modules/setting"
)

// SignMerge determines if we should sign a PR merge commit to the base repository
func (pr *PullRequest) SignMerge(u *user_model.User, tmpBasePath, baseCommit, headCommit string) (bool, string, *git.Signature, error) {
	if err := pr.LoadBaseRepo(); err != nil {
		log.Error("Unable to get Base Repo for pull request")
		return false, "", nil, err
	}
	repo := pr.BaseRepo

	signingKey, signer := SigningKey(repo.RepoPath())
	if signingKey == "" {
		return false, "", nil, &ErrWontSign{noKey}
	}
	rules := signingModeFromStrings(setting.Repository.Signing.Merges)

	var gitRepo *git.Repository
	var err error

Loop:
	for _, rule := range rules {
		switch rule {
		case never:
			return false, "", nil, &ErrWontSign{never}
		case always:
			break Loop
		case pubkey:
			keys, err := ListGPGKeys(u.ID, db.ListOptions{})
			if err != nil {
				return false, "", nil, err
			}
			if len(keys) == 0 {
				return false, "", nil, &ErrWontSign{pubkey}
			}
		case twofa:
			twofaModel, err := login.GetTwoFactorByUID(u.ID)
			if err != nil && !login.IsErrTwoFactorNotEnrolled(err) {
				return false, "", nil, err
			}
			if twofaModel == nil {
				return false, "", nil, &ErrWontSign{twofa}
			}
		case approved:
			protectedBranch, err := GetProtectedBranchBy(repo.ID, pr.BaseBranch)
			if err != nil {
				return false, "", nil, err
			}
			if protectedBranch == nil {
				return false, "", nil, &ErrWontSign{approved}
			}
			if protectedBranch.GetGrantedApprovalsCount(pr) < 1 {
				return false, "", nil, &ErrWontSign{approved}
			}
		case baseSigned:
			if gitRepo == nil {
				gitRepo, err = git.OpenRepository(tmpBasePath)
				if err != nil {
					return false, "", nil, err
				}
				defer gitRepo.Close()
			}
			commit, err := gitRepo.GetCommit(baseCommit)
			if err != nil {
				return false, "", nil, err
			}
			verification := ParseCommitWithSignature(commit)
			if !verification.Verified {
				return false, "", nil, &ErrWontSign{baseSigned}
			}
		case headSigned:
			if gitRepo == nil {
				gitRepo, err = git.OpenRepository(tmpBasePath)
				if err != nil {
					return false, "", nil, err
				}
				defer gitRepo.Close()
			}
			commit, err := gitRepo.GetCommit(headCommit)
			if err != nil {
				return false, "", nil, err
			}
			verification := ParseCommitWithSignature(commit)
			if !verification.Verified {
				return false, "", nil, &ErrWontSign{headSigned}
			}
		case commitsSigned:
			if gitRepo == nil {
				gitRepo, err = git.OpenRepository(tmpBasePath)
				if err != nil {
					return false, "", nil, err
				}
				defer gitRepo.Close()
			}
			commit, err := gitRepo.GetCommit(headCommit)
			if err != nil {
				return false, "", nil, err
			}
			verification := ParseCommitWithSignature(commit)
			if !verification.Verified {
				return false, "", nil, &ErrWontSign{commitsSigned}
			}
			// need to work out merge-base
			mergeBaseCommit, _, err := gitRepo.GetMergeBase("", baseCommit, headCommit)
			if err != nil {
				return false, "", nil, err
			}
			commitList, err := commit.CommitsBeforeUntil(mergeBaseCommit)
			if err != nil {
				return false, "", nil, err
			}
			for _, commit := range commitList {
				verification := ParseCommitWithSignature(commit)
				if !verification.Verified {
					return false, "", nil, &ErrWontSign{commitsSigned}
				}
			}
		}
	}
	return true, signingKey, signer, nil
}