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Code Issues Projects Releases Packages Wiki Activity Actions 8

Merge pull request '[CHORE] Use github.com/ProtonMail/go-crypto' (#4506) from gusted/proton-openpgp into forgejo

Browse source 
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/4506
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
This commit is contained in:
Earl Warren 2024-07-15 16:49:05 +00:00
commit 56ee58c239
13 changed files with 93 additions and 37 deletions
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5
assets/go-licenses.json generated
View file

@ -634,11 +634,6 @@
"path": "github.com/kevinburke/ssh_config/LICENSE",
"licenseText": "Copyright (c) 2017 Kevin Burke.\n\nPermission is hereby granted, free of charge, to any person\nobtaining a copy of this software and associated documentation\nfiles (the \"Software\"), to deal in the Software without\nrestriction, including without limitation the rights to use,\ncopy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the\nSoftware is furnished to do so, subject to the following\nconditions:\n\nThe above copyright notice and this permission notice shall be\nincluded in all copies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND,\nEXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES\nOF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\nNONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT\nHOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,\nWHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\nFROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR\nOTHER DEALINGS IN THE SOFTWARE.\n\n===================\n\nThe lexer and parser borrow heavily from github.com/pelletier/go-toml. The\nlicense for that project is copied below.\n\nThe MIT License (MIT)\n\nCopyright (c) 2013 - 2017 Thomas Pelletier, Eric Anderton\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n"
},
{
"name": "github.com/keybase/go-crypto",
"path": "github.com/keybase/go-crypto/LICENSE",
"licenseText": "Copyright (c) 2009 The Go Authors. All rights reserved.\n\nRedistribution and use in source and binary forms, with or without\nmodification, are permitted provided that the following conditions are\nmet:\n\n * Redistributions of source code must retain the above copyright\nnotice, this list of conditions and the following disclaimer.\n * Redistributions in binary form must reproduce the above\ncopyright notice, this list of conditions and the following disclaimer\nin the documentation and/or other materials provided with the\ndistribution.\n * Neither the name of Google Inc. nor the names of its\ncontributors may be used to endorse or promote products derived from\nthis software without specific prior written permission.\n\nTHIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n\"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\nLIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\nA PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\nOWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\nSPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\nLIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\nDATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\nTHEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\nOF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
},
{
"name": "github.com/klauspost/compress",
"path": "github.com/klauspost/compress/LICENSE",

1
go.mod
View file

@ -68,7 +68,6 @@ require (
github.com/jhillyerd/enmime v1.2.0
github.com/json-iterator/go v1.1.12
github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51
github.com/keybase/go-crypto v0.0.0-20200123153347-de78d2cb44f4
github.com/klauspost/compress v1.17.9
github.com/klauspost/cpuid/v2 v2.2.8
github.com/lib/pq v1.10.9

2
go.sum
View file

@ -458,8 +458,6 @@ github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 h1:Z9n2FFNU
github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51/go.mod h1:CzGEWj7cYgsdH8dAjBGEr58BoE7ScuLd+fwFZ44+/x8=
github.com/kevinburke/ssh_config v1.2.0 h1:x584FjTGwHzMwvHx18PXxbBVzfnxogHaAReU4gf13a4=
github.com/kevinburke/ssh_config v1.2.0/go.mod h1:CT57kijsi8u/K/BOFA39wgDQJ9CxiF4nAY/ojJ6r6mM=
github.com/keybase/go-crypto v0.0.0-20200123153347-de78d2cb44f4 h1:cTxwSmnaqLoo+4tLukHoB9iqHOu3LmLhRmgUxZo6Vp4=
github.com/keybase/go-crypto v0.0.0-20200123153347-de78d2cb44f4/go.mod h1:ghbZscTyKdM07+Fw3KSi0hcJm+AlEUWj8QLlPtijN/M=
github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
github.com/klauspost/compress v1.4.1/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=

14
models/asymkey/gpg_key.go
View file

@ -13,8 +13,8 @@ import (
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/timeutil"
"github.com/keybase/go-crypto/openpgp"
"github.com/keybase/go-crypto/openpgp/packet"
"github.com/ProtonMail/go-crypto/openpgp"
"github.com/ProtonMail/go-crypto/openpgp/packet"
"xorm.io/builder"
)
@ -141,7 +141,12 @@ func parseGPGKey(ctx context.Context, ownerID int64, e *openpgp.Entity, verified
// Parse Subkeys
subkeys := make([]*GPGKey, len(e.Subkeys))
for i, k := range e.Subkeys {
subs, err := parseSubGPGKey(ownerID, pubkey.KeyIdString(), k.PublicKey, expiry)
subKeyExpiry := expiry
if k.Sig.KeyLifetimeSecs != nil {
subKeyExpiry = k.PublicKey.CreationTime.Add(time.Duration(*k.Sig.KeyLifetimeSecs) * time.Second)
}
subs, err := parseSubGPGKey(ownerID, pubkey.KeyIdString(), k.PublicKey, subKeyExpiry)
if err != nil {
return nil, ErrGPGKeyParsing{ParseError: err}
}
@ -156,7 +161,8 @@ func parseGPGKey(ctx context.Context, ownerID int64, e *openpgp.Entity, verified
emails := make([]*user_model.EmailAddress, 0, len(e.Identities))
for _, ident := range e.Identities {
if ident.Revocation != nil {
// Check if the identity is revoked.
if ident.Revoked(time.Now()) {
continue
}
email := strings.ToLower(strings.TrimSpace(ident.UserId.Email))

8
models/asymkey/gpg_key_add.go
View file

@ -10,7 +10,7 @@ import (
"code.gitea.io/gitea/models/db"
"code.gitea.io/gitea/modules/log"
"github.com/keybase/go-crypto/openpgp"
"github.com/ProtonMail/go-crypto/openpgp"
)
// __________________ ________ ____ __.
@ -83,12 +83,12 @@ func AddGPGKey(ctx context.Context, ownerID int64, content, token, signature str
verified := false
// Handle provided signature
if signature != "" {
signer, err := openpgp.CheckArmoredDetachedSignature(ekeys, strings.NewReader(token), strings.NewReader(signature))
signer, err := openpgp.CheckArmoredDetachedSignature(ekeys, strings.NewReader(token), strings.NewReader(signature), nil)
if err != nil {
signer, err = openpgp.CheckArmoredDetachedSignature(ekeys, strings.NewReader(token+"\n"), strings.NewReader(signature))
signer, err = openpgp.CheckArmoredDetachedSignature(ekeys, strings.NewReader(token+"\n"), strings.NewReader(signature), nil)
}
if err != nil {
signer, err = openpgp.CheckArmoredDetachedSignature(ekeys, strings.NewReader(token+"\r\n"), strings.NewReader(signature))
signer, err = openpgp.CheckArmoredDetachedSignature(ekeys, strings.NewReader(token+"\r\n"), strings.NewReader(signature), nil)
}
if err != nil {
log.Error("Unable to validate token signature. Error: %v", err)

8
models/asymkey/gpg_key_common.go
View file

@ -13,9 +13,9 @@ import (
"strings"
"time"
"github.com/keybase/go-crypto/openpgp"
"github.com/keybase/go-crypto/openpgp/armor"
"github.com/keybase/go-crypto/openpgp/packet"
"github.com/ProtonMail/go-crypto/openpgp"
"github.com/ProtonMail/go-crypto/openpgp/armor"
"github.com/ProtonMail/go-crypto/openpgp/packet"
)
// __________________ ________ ____ __.
@ -88,7 +88,7 @@ func getExpiryTime(e *openpgp.Entity) time.Time {
for _, ident := range e.Identities {
if selfSig == nil {
selfSig = ident.SelfSignature
} else if ident.SelfSignature.IsPrimaryId != nil && *ident.SelfSignature.IsPrimaryId {
} else if ident.SelfSignature != nil && ident.SelfSignature.IsPrimaryId != nil && *ident.SelfSignature.IsPrimaryId {
selfSig = ident.SelfSignature
break
}

2
models/asymkey/gpg_key_object_verification.go
View file

@ -17,7 +17,7 @@ import (
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"github.com/keybase/go-crypto/openpgp/packet"
"github.com/ProtonMail/go-crypto/openpgp/packet"
)
// This file provides functions related to object (commit, tag) verification

62
models/asymkey/gpg_key_test.go
View file

@ -13,7 +13,7 @@ import (
"code.gitea.io/gitea/modules/timeutil"
"code.gitea.io/gitea/modules/util"
"github.com/keybase/go-crypto/openpgp/packet"
"github.com/ProtonMail/go-crypto/openpgp/packet"
"github.com/stretchr/testify/assert"
)
@ -241,6 +241,66 @@ Q0KHb+QcycSgbDx0ZAvdIacuKvBBcbxrsmFUI4LR+oIup0G9gUc0roPvr014jYQL
}
}
func TestCheckGPGRevokedIdentity(t *testing.T) {
assert.NoError(t, unittest.PrepareTestDatabase())
assert.NoError(t, db.Insert(db.DefaultContext, &user_model.EmailAddress{UID: 1, Email: "no-reply@golang.com", IsActivated: true}))
assert.NoError(t, db.Insert(db.DefaultContext, &user_model.EmailAddress{UID: 1, Email: "revoked@golang.com", IsActivated: true}))
_ = unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1})
revokedUserKey := `-----BEGIN PGP PUBLIC KEY BLOCK-----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=IKnw
-----END PGP PUBLIC KEY BLOCK-----
`
keys, err := AddGPGKey(db.DefaultContext, 1, revokedUserKey, "", "")
assert.NoError(t, err)
assert.Len(t, keys, 1)
assert.Len(t, keys[0].Emails, 1)
assert.EqualValues(t, "no-reply@golang.com", keys[0].Emails[0].Email)
primaryKeyID := "D68172F48E9C5283"
// Assert primary key
unittest.AssertExistsAndLoadBean(t, &GPGKey{OwnerID: 1, KeyID: primaryKeyID, Content: "xsBNBFsgO5EBCADhREPmcjsPkXe1z7ctvyWL0S7oa9JaoGZ9oPDHFDlQxd0qlX2eDZJZDg0qYvVixmaULIulApq1puEsaJCn3lHUbHlb4PYKwLEywYXM28JN91KtLsz/uaEX2KC5WqeP40utmzkNLq+oRX/xnRMgwbO7yUNVG2UlEa6eI+xOXO3YtLdmJMBWClQ066ZnOIzEo1JxnIwha1CDBMWLLfOLrg6l8InUqaXbtEBbnaIYO6fXVXELUjkxnmk7t/QOk0tXCy8muH9UDqJkwDUESY2l79XwBAcx9riX8vY7vwC34pm22fAUVLCJx1SJx0J8bkeNp38jKM2Zd9SUQqSbfBopQ4pPABEBAAE="})
// Assert subkey
unittest.AssertExistsAndLoadBean(t, &GPGKey{OwnerID: 1, KeyID: "2C56900BE5486AF8", PrimaryKeyID: primaryKeyID, Content: "zsBNBFsgO5EBCAC5INOERA2aNSYHWFeMfByShUuMQGFmyL2tWT6rwzZmUVG0GUdvoKSRhMJ+81aHxr5zmIhluegEuY99UhX+ZK6NftW2UOYjjjQZ4NPDjqOfP5dYUbHiCFRgeUxkmjwnQoSih63iSOoUt5kocR+oXXxbYmbgeOa8KGgKzDLGHI2nsy8Cni3N/enKVMMHGbJy1DXdV7uRFhBdjnRZGdmtamHcQbwGHUH+PtTa/jUSMdbtTUvXPI6dz7jDpK0BImzbXNb+r9CcudpiixuMu5gv3qyJL5EAWCXcT2j+y2VWj2HN/8bJHMoo6yf+bn6A/Cu9f0obbGVF0kJ/Y5UWmEdBG6IzABEBAAE="})
}
func TestCheckGParseGPGExpire(t *testing.T) {
testIssue6599 := `-----BEGIN PGP PUBLIC KEY BLOCK-----

1
release-notes/4506.md Normal file
View file

@ -0,0 +1 @@
Replaced the openpgp library to use a maintained version, github.com/ProtonMail/go-crypto. This change also went hand in hand with doing correct revocation checks (instead of merely checking if a revocation signature existed) and using the expiration of a subkey if one existed instead of always using the expiration of the default key.

4
routers/web/user/home.go
View file

@ -35,8 +35,8 @@ import (
issue_service "code.gitea.io/gitea/services/issue"
pull_service "code.gitea.io/gitea/services/pull"
"github.com/keybase/go-crypto/openpgp"
"github.com/keybase/go-crypto/openpgp/armor"
"github.com/ProtonMail/go-crypto/openpgp"
"github.com/ProtonMail/go-crypto/openpgp/armor"
"xorm.io/builder"
)

8
services/packages/debian/repository.go
View file

@ -23,10 +23,10 @@ import (
"code.gitea.io/gitea/modules/util"
packages_service "code.gitea.io/gitea/services/packages"
"github.com/keybase/go-crypto/openpgp"
"github.com/keybase/go-crypto/openpgp/armor"
"github.com/keybase/go-crypto/openpgp/clearsign"
"github.com/keybase/go-crypto/openpgp/packet"
"github.com/ProtonMail/go-crypto/openpgp"
"github.com/ProtonMail/go-crypto/openpgp/armor"
"github.com/ProtonMail/go-crypto/openpgp/clearsign"
"github.com/ProtonMail/go-crypto/openpgp/packet"
"github.com/ulikunitz/xz"
)

6
services/packages/rpm/repository.go
View file

@ -26,9 +26,9 @@ import (
"code.gitea.io/gitea/modules/util"
packages_service "code.gitea.io/gitea/services/packages"
"github.com/keybase/go-crypto/openpgp"
"github.com/keybase/go-crypto/openpgp/armor"
"github.com/keybase/go-crypto/openpgp/packet"
"github.com/ProtonMail/go-crypto/openpgp"
"github.com/ProtonMail/go-crypto/openpgp/armor"
"github.com/ProtonMail/go-crypto/openpgp/packet"
)
// GetOrCreateRepositoryVersion gets or creates the internal repository package

9
tests/integration/user_test.go
View file

@ -166,8 +166,7 @@ Note: This user hasn't uploaded any GPG keys.
=twTO
-----END PGP PUBLIC KEY BLOCK-----
`)
-----END PGP PUBLIC KEY BLOCK-----`)
// Import key
// User1 <user1@example.com>
session := loginUser(t, "user1")
@ -201,8 +200,7 @@ C0TLXKur6NVYQMn01iyL+FZzRpEWNuYF3f9QeeLJ/+l2DafESNhNTy17+RPmacK6
7XhJ1v6JYuh8kaYaEz8OpZDeh7f6Ho6PzJrsy/TKTKhGgZNINj1iaPFyOkQgKR5M
GrE0MHOxUbc9tbtyk0F1SuzREUBH
=DDXw
-----END PGP PUBLIC KEY BLOCK-----
`)
-----END PGP PUBLIC KEY BLOCK-----`)
// Export new key
testExportUserGPGKeys(t, "user1", `-----BEGIN PGP PUBLIC KEY BLOCK-----
@ -233,8 +231,7 @@ C0TLXKur6NVYQMn01iyL+FZzRpEWNuYF3f9QeeLJ/+l2DafESNhNTy17+RPmacK6
7XhJ1v6JYuh8kaYaEz8OpZDeh7f6Ho6PzJrsy/TKTKhGgZNINj1iaPFyOkQgKR5M
GrE0MHOxUbc9tbtyk0F1SuzREUBH
=WFf5
-----END PGP PUBLIC KEY BLOCK-----
`)
-----END PGP PUBLIC KEY BLOCK-----`)
}
func testExportUserGPGKeys(t *testing.T, user, expected string) {