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

// Copyright 2021 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 asymkey

import (
	"strconv"
	"time"

	"code.gitea.io/gitea/models/db"
	user_model "code.gitea.io/gitea/models/user"
	"code.gitea.io/gitea/modules/base"
	"code.gitea.io/gitea/modules/log"
)

//   __________________  ________   ____  __.
//  /  _____/\______   \/  _____/  |    |/ _|____ ___.__.
// /   \  ___ |     ___/   \  ___  |      <_/ __ <   |  |
// \    \_\  \|    |   \    \_\  \ |    |  \  ___/\___  |
//  \______  /|____|    \______  / |____|__ \___  > ____|
//         \/                  \/          \/   \/\/
// ____   ____           .__  _____
// \   \ /   /___________|__|/ ____\__.__.
//  \   Y   // __ \_  __ \  \   __<   |  |
//   \     /\  ___/|  | \/  ||  |  \___  |
//    \___/  \___  >__|  |__||__|  / ____|
//               \/                \/

// This file provides functions relating verifying gpg keys

// VerifyGPGKey marks a GPG key as verified
func VerifyGPGKey(ownerID int64, keyID, token, signature string) (string, error) {
	ctx, committer, err := db.TxContext()
	if err != nil {
		return "", err
	}
	defer committer.Close()

	key := new(GPGKey)

	has, err := db.GetEngine(ctx).Where("owner_id = ? AND key_id = ?", ownerID, keyID).Get(key)
	if err != nil {
		return "", err
	} else if !has {
		return "", ErrGPGKeyNotExist{}
	}

	sig, err := extractSignature(signature)
	if err != nil {
		return "", ErrGPGInvalidTokenSignature{
			ID:      key.KeyID,
			Wrapped: err,
		}
	}

	signer, err := hashAndVerifyWithSubKeys(sig, token, key)
	if err != nil {
		return "", ErrGPGInvalidTokenSignature{
			ID:      key.KeyID,
			Wrapped: err,
		}
	}
	if signer == nil {
		signer, err = hashAndVerifyWithSubKeys(sig, token+"\n", key)

		if err != nil {
			return "", ErrGPGInvalidTokenSignature{
				ID:      key.KeyID,
				Wrapped: err,
			}
		}
	}
	if signer == nil {
		signer, err = hashAndVerifyWithSubKeys(sig, token+"\n\n", key)
		if err != nil {
			return "", ErrGPGInvalidTokenSignature{
				ID:      key.KeyID,
				Wrapped: err,
			}
		}
	}

	if signer == nil {
		log.Error("Unable to validate token signature. Error: %v", err)
		return "", ErrGPGInvalidTokenSignature{
			ID: key.KeyID,
		}
	}

	if signer.PrimaryKeyID != key.KeyID && signer.KeyID != key.KeyID {
		return "", ErrGPGKeyNotExist{}
	}

	key.Verified = true
	if _, err := db.GetEngine(ctx).ID(key.ID).SetExpr("verified", true).Update(new(GPGKey)); err != nil {
		return "", err
	}

	if err := committer.Commit(); err != nil {
		return "", err
	}

	return key.KeyID, nil
}

// VerificationToken returns token for the user that will be valid in minutes (time)
func VerificationToken(user *user_model.User, minutes int) string {
	return base.EncodeSha256(
		time.Now().Truncate(1*time.Minute).Add(time.Duration(minutes)*time.Minute).Format(time.RFC1123Z) + ":" +
			user.CreatedUnix.FormatLong() + ":" +
			user.Name + ":" +
			user.Email + ":" +
			strconv.FormatInt(user.ID, 10))
}