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Support SAML authentication (#25165)

Browse Source 
Closes https://github.com/go-gitea/gitea/issues/5512

This PR adds basic SAML support
- Adds SAML 2.0 as an auth source
- Adds SAML configuration documentation
- Adds integration test:
- Use bare-bones SAML IdP to test protocol flow and test account is
linked successfully (only runs on Postgres by default)
- Adds documentation for configuring and running SAML integration test
locally

Future PRs:
- Support group mapping
- Support auto-registration (account linking)

Co-Authored-By: @jackHay22

---------

Co-authored-by: jackHay22 <jack@allspice.io>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: KN4CK3R <admin@oldschoolhack.me>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Jason Song <i@wolfogre.com>
Co-authored-by: morphelinho <morphelinho@users.noreply.github.com>
Co-authored-by: Zettat123 <zettat123@gmail.com>
Co-authored-by: Yarden Shoham <git@yardenshoham.com>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: silverwind <me@silverwind.io>
This commit is contained in:
techknowlogick 2024-02-22 19:08:17 -05:00 committed by GitHub
parent c4b0cb4d0d
commit 5bb8d1924d
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GPG Key ID: B5690EEEBB952194
37 changed files with 1440 additions and 69 deletions
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8
.github/workflows/pull-db-tests.yml vendored
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@ -37,6 +37,14 @@ jobs:
MINIO_ROOT_PASSWORD: 12345678
ports:
- "9000:9000"
simplesaml:
image: allspice/simple-saml
ports:
- "8080:8080"
env:
SIMPLESAMLPHP_SP_ENTITY_ID: http://localhost:3002/user/saml/test-sp/metadata
SIMPLESAMLPHP_SP_ASSERTION_CONSUMER_SERVICE: http://localhost:3002/user/saml/test-sp/acs
SIMPLESAMLPHP_SP_SINGLE_LOGOUT_SERVICE: http://localhost:3002/user/saml/test-sp/acs
steps:
- uses: actions/checkout@v4
- uses: actions/setup-go@v5

25
assets/go-licenses.json generated
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File diff suppressed because one or more lines are too long

69
docs/content/usage/authentication.en-us.md
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@ -349,3 +349,72 @@ If set `ENABLE_REVERSE_PROXY_FULL_NAME=true`, a user full name expected in `X-WE
You can also limit the reverse proxy's IP address range with `REVERSE_PROXY_TRUSTED_PROXIES` which default value is `127.0.0.0/8,::1/128`. By `REVERSE_PROXY_LIMIT`, you can limit trusted proxies level.
Notice: Reverse Proxy Auth doesn't support the API. You still need an access token or basic auth to make API requests.
## SAML
### Configuring Gitea as a SAML 2.0 Service Provider
- Navigate to `Site Administration > Identity & Access > Authentication Sources`.
- Click the `Add Authentication Source` button.
- Select `SAML` as the authentication type.
#### Features Not Yet Supported
Currently, auto-registration is not supported for SAML. During the external account linking process the user will be prompted to set a username and email address or link to an existing account.
SAML group mapping is not supported.
#### Settings
- `Authentication Name` **(required)**
- The name of this authentication source (appears in the Gitea ACS and metadata URLs)
- `SAML NameID Format` **(required)**
- This specifies how Identity Provider (IdP) users are mapped to Gitea users. This option will be provider specific.
- `Icon URL` (optional)
- URL of an icon to display on the Sign-In page for this authentication source.
- `[Insecure] Skip Assertion Signature Validation` (optional)
- This option is not recommended and disables integrity verification of IdP SAML assertions.
- `Identity Provider Metadata URL` (optional if XML set)
- The URL of the IdP metadata endpoint.
- This field must be set if `Identity Provider Metadata XML` is left blank.
- `Identity Provider Metadata XML` (optional if URL set)
- The XML returned by the IdP metadata endpoint.
- This field must be set if `Identity Provider Metadata URL` is left blank.
- `Service Provider Certificate` (optional)
- X.509-formatted certificate (with `Service Provider Private Key`) used for signing SAML requests.
- A certificate will be generated if this field is left blank.
- `Service Provider Private Key` (optional)
- DSA/RSA private key (with `Service Provider Certificate`) used for signing SAML requests.
- A private key will be generated if this field is left blank.
- `Email Assertion Key` (optional)
- The SAML assertion key used for the IdP user's email (depends on provider configuration).
- `Name Assertion Key` (optional)
- The SAML assertion key used for the IdP user's nickname (depends on provider configuration).
- `Username Assertion Key` (optional)
- The SAML assertion key used for the IdP user's username (depends on provider configuration).
### Configuring a SAML 2.0 Identity Provider to use Gitea
- The service provider assertion consumer service url will look like: `http(s)://[mydomain]/user/saml/[Authentication Name]/acs`.
- The service provider metadata url will look like: `http(s)://[mydomain]/user/saml/[Authentication Name]/metadata`.

5
go.mod
View File

@ -91,6 +91,8 @@ require (
github.com/quasoft/websspi v1.1.2
github.com/redis/go-redis/v9 v9.4.0
github.com/robfig/cron/v3 v3.0.1
github.com/russellhaering/gosaml2 v0.9.1
github.com/russellhaering/goxmldsig v1.3.0
github.com/santhosh-tekuri/jsonschema/v5 v5.3.1
github.com/sassoftware/go-rpmutils v0.2.1-0.20240124161140-277b154961dd
github.com/sergi/go-diff v1.3.1
@ -143,6 +145,7 @@ require (
github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be // indirect
github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 // indirect
github.com/aymerick/douceur v0.2.0 // indirect
github.com/beevik/etree v1.1.0 // indirect
github.com/beorn7/perks v1.0.1 // indirect
github.com/bits-and-blooms/bitset v1.13.0 // indirect
github.com/blevesearch/bleve_index_api v1.1.5 // indirect
@ -216,6 +219,7 @@ require (
github.com/imdario/mergo v0.3.16 // indirect
github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
github.com/jessevdk/go-flags v1.5.0 // indirect
github.com/jonboulle/clockwork v0.3.0 // indirect
github.com/josharian/intern v1.0.0 // indirect
github.com/kevinburke/ssh_config v1.2.0 // indirect
github.com/klauspost/pgzip v1.2.6 // indirect
@ -225,6 +229,7 @@ require (
github.com/magiconair/properties v1.8.7 // indirect
github.com/mailru/easyjson v0.7.7 // indirect
github.com/markbates/going v1.0.3 // indirect
github.com/mattermost/xml-roundtrip-validator v0.1.0 // indirect
github.com/mattn/go-colorable v0.1.13 // indirect
github.com/mattn/go-runewidth v0.0.15 // indirect
github.com/mholt/acmez v1.2.0 // indirect

12
go.sum
View File

@ -130,6 +130,8 @@ github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 h1:DklsrG3d
github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
github.com/aymerick/douceur v0.2.0 h1:Mv+mAeH1Q+n9Fr+oyamOlAkUNPWPlA8PPGR0QAaYuPk=
github.com/aymerick/douceur v0.2.0/go.mod h1:wlT5vV2O3h55X9m7iVYN0TBM0NH/MmbLnd30/FjWUq4=
github.com/beevik/etree v1.1.0 h1:T0xke/WvNtMoCqgzPhkX2r4rjY3GDZFi+FjpRZY2Jbs=
github.com/beevik/etree v1.1.0/go.mod h1:r8Aw8JqVegEf0w2fDnATrX9VpkMcyFeM0FhwO62wh+A=
github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
github.com/bits-and-blooms/bitset v1.1.10/go.mod h1:w0XsmFg8qg6cmpTtJ0z3pKgjTDBMMnI/+I2syrE6XBE=
@ -566,6 +568,9 @@ github.com/jhillyerd/enmime v1.1.0 h1:ubaIzg68VY7CMCe2YbHe6nkRvU9vujixTkNz3EBvZO
github.com/jhillyerd/enmime v1.1.0/go.mod h1:FRFuUPCLh8PByQv+8xRcLO9QHqaqTqreYhopv5eyk4I=
github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
github.com/jonboulle/clockwork v0.2.2/go.mod h1:Pkfl5aHPm1nk2H9h0bjmnJD/BcgbGXUBGnn1kMkgxc8=
github.com/jonboulle/clockwork v0.3.0 h1:9BSCMi8C+0qdApAp4auwX0RkLGUjs956h0EkuQymUhg=
github.com/jonboulle/clockwork v0.3.0/go.mod h1:Pkfl5aHPm1nk2H9h0bjmnJD/BcgbGXUBGnn1kMkgxc8=
github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
@ -634,6 +639,8 @@ github.com/markbates/going v1.0.3 h1:mY45T5TvW+Xz5A6jY7lf4+NLg9D8+iuStIHyR7M8qsE
github.com/markbates/going v1.0.3/go.mod h1:fQiT6v6yQar9UD6bd/D4Z5Afbk9J6BBVBtLiyY4gp2o=
github.com/markbates/goth v1.78.0 h1:7VEIFDycJp9deyVv3YraGBPdD0ZYQW93Y3Aw1eVP3BY=
github.com/markbates/goth v1.78.0/go.mod h1:X6xdNgpapSENS0O35iTBBcMHoJDQDfI9bJl+APCkYMc=
github.com/mattermost/xml-roundtrip-validator v0.1.0 h1:RXbVD2UAl7A7nOTR4u7E3ILa4IbtvKBHw64LDsmu9hU=
github.com/mattermost/xml-roundtrip-validator v0.1.0/go.mod h1:qccnGMcpgwcNaBnxqpJpWWUiPNr5H3O8eDgGV9gT5To=
github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
@ -766,12 +773,17 @@ github.com/robfig/cron/v3 v3.0.1 h1:WdRxkvbJztn8LMz/QEvLN5sBU+xKpSqwwUO1Pjr4qDs=
github.com/robfig/cron/v3 v3.0.1/go.mod h1:eQICP3HwyT7UooqI/z+Ov+PtYAWygg1TEWWzGIFLtro=
github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
github.com/rogpeppe/go-internal v1.6.1/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
github.com/rogpeppe/go-internal v1.8.0/go.mod h1:WmiCO8CzOY8rg0OYDC4/i/2WRWAB6poM+XZ2dLUbcbE=
github.com/rogpeppe/go-internal v1.8.1/go.mod h1:JeRgkft04UBgHMgCIwADu4Pn6Mtm5d4nPKWu0nJ5d+o=
github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
github.com/rs/xid v1.5.0 h1:mKX4bl4iPYJtEIxp6CYiUuLQ/8DYMoz0PUdtGgMFRVc=
github.com/rs/xid v1.5.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
github.com/russellhaering/gosaml2 v0.9.1 h1:H/whrl8NuSoxyW46Ww5lKPskm+5K+qYLw9afqJ/Zef0=
github.com/russellhaering/gosaml2 v0.9.1/go.mod h1:ja+qgbayxm+0mxBRLMSUuX3COqy+sb0RRhIGun/W2kc=
github.com/russellhaering/goxmldsig v1.3.0 h1:DllIWUgMy0cRUMfGiASiYEa35nsieyD3cigIwLonTPM=
github.com/russellhaering/goxmldsig v1.3.0/go.mod h1:gM4MDENBQf7M+V824SGfyIUVFWydB7n0KkEubVJl+Tw=
github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=

20
models/auth/oauth2.go
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@ -8,6 +8,7 @@ import (
"crypto/sha256"
"encoding/base32"
"encoding/base64"
"encoding/gob"
"fmt"
"net"
"net/url"
@ -81,6 +82,10 @@ func Init(ctx context.Context) error {
builtinAllClientIDs = append(builtinAllClientIDs, clientID)
}
// This is needed in order to encode and store the struct in the goth/gothic session
// during the process of linking the external user.
gob.Register(LinkAccountUser{})
var registeredApps []*OAuth2Application
if err := db.GetEngine(ctx).In("client_id", builtinAllClientIDs).Find(&registeredApps); err != nil {
return err
@ -605,21 +610,6 @@ func (err ErrOAuthApplicationNotFound) Unwrap() error {
return util.ErrNotExist
}
// GetActiveOAuth2SourceByName returns a OAuth2 AuthSource based on the given name
func GetActiveOAuth2SourceByName(ctx context.Context, name string) (*Source, error) {
authSource := new(Source)
has, err := db.GetEngine(ctx).Where("name = ? and type = ? and is_active = ?", name, OAuth2, true).Get(authSource)
if err != nil {
return nil, err
}
if !has {
return nil, fmt.Errorf("oauth2 source not found, name: %q", name)
}
return authSource, nil
}
func DeleteOAuth2RelictsByUserID(ctx context.Context, userID int64) error {
deleteCond := builder.Select("id").From("oauth2_grant").Where(builder.Eq{"oauth2_grant.user_id": userID})

38
models/auth/source.go
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@ -14,6 +14,7 @@ import (
"code.gitea.io/gitea/modules/timeutil"
"code.gitea.io/gitea/modules/util"
"github.com/markbates/goth"
"xorm.io/builder"
"xorm.io/xorm"
"xorm.io/xorm/convert"
@ -32,6 +33,7 @@ const (
DLDAP // 5
OAuth2 // 6
SSPI // 7
SAML // 8
)
// String returns the string name of the LoginType
@ -52,6 +54,7 @@ var Names = map[Type]string{
PAM: "PAM",
OAuth2: "OAuth2",
SSPI: "SPNEGO with SSPI",
SAML: "SAML",
}
// Config represents login config as far as the db is concerned
@ -121,6 +124,12 @@ type Source struct {
UpdatedUnix timeutil.TimeStamp `xorm:"INDEX updated"`
}
// LinkAccountUser is used to link an external user with a local user
type LinkAccountUser struct {
Type Type
GothUser goth.User
}
// TableName xorm will read the table name from this method
func (Source) TableName() string {
return "login_source"
@ -180,6 +189,11 @@ func (source *Source) IsSSPI() bool {
return source.Type == SSPI
}
// IsSAML returns true of this source is of the SAML type.
func (source *Source) IsSAML() bool {
return source.Type == SAML
}
// HasTLS returns true of this source supports TLS.
func (source *Source) HasTLS() bool {
hasTLSer, ok := source.Cfg.(HasTLSer)
@ -392,3 +406,27 @@ func IsErrSourceInUse(err error) bool {
func (err ErrSourceInUse) Error() string {
return fmt.Sprintf("login source is still used by some users [id: %d]", err.ID)
}
// GetActiveAuthProviderSources returns all activated sources
func GetActiveAuthProviderSources(ctx context.Context, authType Type) ([]*Source, error) {
sources := make([]*Source, 0, 1)
if err := db.GetEngine(ctx).Where("is_active = ? and type = ?", true, authType).Find(&sources); err != nil {
return nil, err
}
return sources, nil
}
// GetActiveAuthSourceByName returns an AuthSource based on the given name and type
func GetActiveAuthSourceByName(ctx context.Context, name string, authType Type) (*Source, error) {
authSource := new(Source)
has, err := db.GetEngine(ctx).Where("name = ? and type = ? and is_active = ?", name, authType, true).Get(authSource)
if err != nil {
return nil, err
}
if !has {
return nil, fmt.Errorf("auth source not found, name: %q", name)
}
return authSource, nil
}

14
options/locale/locale_en-US.ini
View File

@ -522,6 +522,9 @@ Content = Content
SSPISeparatorReplacement = Separator
SSPIDefaultLanguage = Default Language
SAMLMetadata = Either SAML Identity Provider metadata URL or XML
SAMLMetadataURL = SAML Identity Provider metadata URL is invalid
require_error = ` cannot be empty.`
alpha_dash_error = ` should contain only alphanumeric, dash ('-') and underscore ('_') characters.`
alpha_dash_dot_error = ` should contain only alphanumeric, dash ('-'), underscore ('_') and dot ('.') characters.`
@ -3026,7 +3029,18 @@ auths.sspi_separator_replacement = Separator to use instead of \, / and @
auths.sspi_separator_replacement_helper = The character to use to replace the separators of down-level logon names (eg. the \ in "DOMAIN\user") and user principal names (eg. the @ in "user@example.org").
auths.sspi_default_language = Default user language
auths.sspi_default_language_helper = Default language for users automatically created by SSPI auth method. Leave empty if you prefer language to be automatically detected.
auths.saml_nameidformat = SAML NameID Format
auths.saml_identity_provider_metadata_url = Identity Provider Metadata URL
auths.saml_identity_provider_metadata = Identity Provider Metadata XML
auths.saml_insecure_skip_assertion_signature_validation = [Insecure] Skip Assertion Signature Validation
auths.saml_service_provider_certificate = Service Provider Certificate
auths.saml_service_provider_private_key = Service Provider Private Key
auths.saml_identity_provider_email_assertion_key = Email Assertion Key
auths.saml_identity_provider_name_assertion_key = Name Assertion Key
auths.saml_identity_provider_username_assertion_key = Username Assertion Key
auths.saml_icon_url = Icon URL
auths.tips = Tips
auths.tips.saml = Documentation can be found at https://docs.gitea.com/usage/authentication#saml
auths.tips.oauth2.general = OAuth2 Authentication
auths.tips.oauth2.general.tip = When registering a new OAuth2 authentication, the callback/redirect URL should be:
auths.tip.oauth2_provider = OAuth2 Provider

2
routers/init.go
View File

@ -35,6 +35,7 @@ import (
actions_service "code.gitea.io/gitea/services/actions"
"code.gitea.io/gitea/services/auth"
"code.gitea.io/gitea/services/auth/source/oauth2"
"code.gitea.io/gitea/services/auth/source/saml"
"code.gitea.io/gitea/services/automerge"
"code.gitea.io/gitea/services/cron"
feed_service "code.gitea.io/gitea/services/feed"
@ -138,6 +139,7 @@ func InitWebInstalled(ctx context.Context) {
log.Info("ORM engine initialization successful!")
mustInit(system.Init)
mustInitCtx(ctx, oauth2.Init)
mustInitCtx(ctx, saml.Init)
mustInit(release_service.Init)

84
routers/web/admin/auths.go
View File

@ -1,9 +1,12 @@
// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package admin
import (
"crypto/tls"
"crypto/x509"
"errors"
"fmt"
"net/http"
@ -25,6 +28,7 @@ import (
"code.gitea.io/gitea/services/auth/source/ldap"
"code.gitea.io/gitea/services/auth/source/oauth2"
pam_service "code.gitea.io/gitea/services/auth/source/pam"
"code.gitea.io/gitea/services/auth/source/saml"
"code.gitea.io/gitea/services/auth/source/smtp"
"code.gitea.io/gitea/services/auth/source/sspi"
"code.gitea.io/gitea/services/forms"
@ -71,6 +75,7 @@ var (
{auth.SMTP.String(), auth.SMTP},
{auth.OAuth2.String(), auth.OAuth2},
{auth.SSPI.String(), auth.SSPI},
{auth.SAML.String(), auth.SAML},
}
if pam.Supported {
items = append(items, dropdownItem{auth.Names[auth.PAM], auth.PAM})
@ -83,6 +88,16 @@ var (
{ldap.SecurityProtocolNames[ldap.SecurityProtocolLDAPS], ldap.SecurityProtocolLDAPS},
{ldap.SecurityProtocolNames[ldap.SecurityProtocolStartTLS], ldap.SecurityProtocolStartTLS},
}
nameIDFormats = []dropdownItem{
{saml.NameIDFormatNames[saml.SAML20Persistent], saml.SAML20Persistent}, // use this as default value
{saml.NameIDFormatNames[saml.SAML11Email], saml.SAML11Email},
{saml.NameIDFormatNames[saml.SAML11Persistent], saml.SAML11Persistent},
{saml.NameIDFormatNames[saml.SAML11Unspecified], saml.SAML11Unspecified},
{saml.NameIDFormatNames[saml.SAML20Email], saml.SAML20Email},
{saml.NameIDFormatNames[saml.SAML20Transient], saml.SAML20Transient},
{saml.NameIDFormatNames[saml.SAML20Unspecified], saml.SAML20Unspecified},
}
)
// NewAuthSource render adding a new auth source page
@ -98,6 +113,8 @@ func NewAuthSource(ctx *context.Context) {
ctx.Data["is_sync_enabled"] = true
ctx.Data["AuthSources"] = authSources
ctx.Data["SecurityProtocols"] = securityProtocols
ctx.Data["CurrentNameIDFormat"] = saml.NameIDFormatNames[saml.SAML20Persistent]
ctx.Data["NameIDFormats"] = nameIDFormats
ctx.Data["SMTPAuths"] = smtp.Authenticators
oauth2providers := oauth2.GetSupportedOAuth2Providers()
ctx.Data["OAuth2Providers"] = oauth2providers
@ -231,6 +248,52 @@ func parseSSPIConfig(ctx *context.Context, form forms.AuthenticationForm) (*sspi
}, nil
}
func parseSAMLConfig(ctx *context.Context, form forms.AuthenticationForm) (*saml.Source, error) {
if util.IsEmptyString(form.IdentityProviderMetadata) && util.IsEmptyString(form.IdentityProviderMetadataURL) {
return nil, fmt.Errorf("%s %s", ctx.Tr("form.SAMLMetadata"), ctx.Tr("form.require_error"))
}
if !util.IsEmptyString(form.IdentityProviderMetadataURL) {
_, err := url.Parse(form.IdentityProviderMetadataURL)
if err != nil {
return nil, fmt.Errorf("%s", ctx.Tr("form.SAMLMetadataURL"))
}
}
// check the integrity of the certificate and private key (autogenerated if these form fields are blank)
if !util.IsEmptyString(form.ServiceProviderCertificate) && !util.IsEmptyString(form.ServiceProviderPrivateKey) {
keyPair, err := tls.X509KeyPair([]byte(form.ServiceProviderCertificate), []byte(form.ServiceProviderPrivateKey))
if err != nil {
return nil, err
}
keyPair.Leaf, err = x509.ParseCertificate(keyPair.Certificate[0])
if err != nil {
return nil, err
}
} else {
privateKey, cert, err := saml.GenerateSAMLSPKeypair()
if err != nil {
return nil, err
}
form.ServiceProviderPrivateKey = privateKey
form.ServiceProviderCertificate = cert
}
return &saml.Source{
IdentityProviderMetadata: form.IdentityProviderMetadata,
IdentityProviderMetadataURL: form.IdentityProviderMetadataURL,
InsecureSkipAssertionSignatureValidation: form.InsecureSkipAssertionSignatureValidation,
NameIDFormat: saml.NameIDFormat(form.NameIDFormat),
ServiceProviderCertificate: form.ServiceProviderCertificate,
ServiceProviderPrivateKey: form.ServiceProviderPrivateKey,
EmailAssertionKey: form.EmailAssertionKey,
NameAssertionKey: form.NameAssertionKey,
UsernameAssertionKey: form.UsernameAssertionKey,
IconURL: form.SAMLIconURL,
}, nil
}
// NewAuthSourcePost response for adding an auth source
func NewAuthSourcePost(ctx *context.Context) {
form := *web.GetForm(ctx).(*forms.AuthenticationForm)
@ -244,6 +307,8 @@ func NewAuthSourcePost(ctx *context.Context) {
ctx.Data["SMTPAuths"] = smtp.Authenticators
oauth2providers := oauth2.GetSupportedOAuth2Providers()
ctx.Data["OAuth2Providers"] = oauth2providers
ctx.Data["CurrentNameIDFormat"] = saml.NameIDFormatNames[saml.NameIDFormat(form.NameIDFormat)]
ctx.Data["NameIDFormats"] = nameIDFormats
ctx.Data["SSPIAutoCreateUsers"] = true
ctx.Data["SSPIAutoActivateUsers"] = true
@ -290,6 +355,13 @@ func NewAuthSourcePost(ctx *context.Context) {
ctx.RenderWithErr(ctx.Tr("admin.auths.login_source_of_type_exist"), tplAuthNew, form)
return
}
case auth.SAML:
var err error
config, err = parseSAMLConfig(ctx, form)
if err != nil {
ctx.RenderWithErr(err.Error(), tplAuthNew, form)
return
}
default:
ctx.Error(http.StatusBadRequest)
return
@ -336,6 +408,7 @@ func EditAuthSource(ctx *context.Context) {
ctx.Data["SMTPAuths"] = smtp.Authenticators
oauth2providers := oauth2.GetSupportedOAuth2Providers()
ctx.Data["OAuth2Providers"] = oauth2providers
ctx.Data["NameIDFormats"] = nameIDFormats
source, err := auth.GetSourceByID(ctx, ctx.ParamsInt64(":authid"))
if err != nil {
@ -344,6 +417,9 @@ func EditAuthSource(ctx *context.Context) {
}
ctx.Data["Source"] = source
ctx.Data["HasTLS"] = source.HasTLS()
if source.IsSAML() {
ctx.Data["CurrentNameIDFormat"] = saml.NameIDFormatNames[source.Cfg.(*saml.Source).NameIDFormat]
}
if source.IsOAuth2() {
type Named interface {
@ -378,6 +454,8 @@ func EditAuthSourcePost(ctx *context.Context) {
}
ctx.Data["Source"] = source
ctx.Data["HasTLS"] = source.HasTLS()
ctx.Data["CurrentNameIDFormat"] = saml.NameIDFormatNames[saml.SAML20Persistent]
ctx.Data["NameIDFormats"] = nameIDFormats
if ctx.HasError() {
ctx.HTML(http.StatusOK, tplAuthEdit)
@ -412,6 +490,12 @@ func EditAuthSourcePost(ctx *context.Context) {
ctx.RenderWithErr(err.Error(), tplAuthEdit, form)
return
}
case auth.SAML:
config, err = parseSAMLConfig(ctx, form)
if err != nil {
ctx.RenderWithErr(err.Error(), tplAuthEdit, form)
return
}
default:
ctx.Error(http.StatusBadRequest)
return

35
routers/web/auth/auth.go
View File

@ -28,6 +28,7 @@ import (
"code.gitea.io/gitea/routers/utils"
auth_service "code.gitea.io/gitea/services/auth"
"code.gitea.io/gitea/services/auth/source/oauth2"
"code.gitea.io/gitea/services/auth/source/saml"
"code.gitea.io/gitea/services/externalaccount"
"code.gitea.io/gitea/services/forms"
"code.gitea.io/gitea/services/mailer"
@ -170,6 +171,14 @@ func SignIn(ctx *context.Context) {
return
}
ctx.Data["OAuth2Providers"] = oauth2Providers
samlProviders, err := saml.GetSAMLProviders(ctx, util.OptionalBoolTrue)
if err != nil {
ctx.ServerError("UserSignIn", err)
return
}
ctx.Data["SAMLProviders"] = samlProviders
ctx.Data["Title"] = ctx.Tr("sign_in")
ctx.Data["SignInLink"] = setting.AppSubURL + "/user/login"
ctx.Data["PageIsSignIn"] = true
@ -193,6 +202,14 @@ func SignInPost(ctx *context.Context) {
return
}
ctx.Data["OAuth2Providers"] = oauth2Providers
samlProviders, err := saml.GetSAMLProviders(ctx, util.OptionalBoolTrue)
if err != nil {
ctx.ServerError("UserSignIn", err)
return
}
ctx.Data["SAMLProviders"] = samlProviders
ctx.Data["Title"] = ctx.Tr("sign_in")
ctx.Data["SignInLink"] = setting.AppSubURL + "/user/login"
ctx.Data["PageIsSignIn"] = true
@ -504,7 +521,7 @@ func SignUpPost(ctx *context.Context) {
Passwd: form.Password,
}
if !createAndHandleCreatedUser(ctx, tplSignUp, form, u, nil, nil, false) {
if !createAndHandleCreatedUser(ctx, tplSignUp, form, u, nil, nil, false, auth.NoType) {
// error already handled
return
}
@ -515,16 +532,16 @@ func SignUpPost(ctx *context.Context) {
// createAndHandleCreatedUser calls createUserInContext and
// then handleUserCreated.
func createAndHandleCreatedUser(ctx *context.Context, tpl base.TplName, form any, u *user_model.User, overwrites *user_model.CreateUserOverwriteOptions, gothUser *goth.User, allowLink bool) bool {
if !createUserInContext(ctx, tpl, form, u, overwrites, gothUser, allowLink) {
func createAndHandleCreatedUser(ctx *context.Context, tpl base.TplName, form any, u *user_model.User, overwrites *user_model.CreateUserOverwriteOptions, gothUser *goth.User, allowLink bool, authType auth.Type) bool {
if !createUserInContext(ctx, tpl, form, u, overwrites, gothUser, allowLink, authType) {
return false
}
return handleUserCreated(ctx, u, gothUser)
return handleUserCreated(ctx, u, gothUser, authType)
}
// createUserInContext creates a user and handles errors within a given context.
// Optionally a template can be specified.
func createUserInContext(ctx *context.Context, tpl base.TplName, form any, u *user_model.User, overwrites *user_model.CreateUserOverwriteOptions, gothUser *goth.User, allowLink bool) (ok bool) {
func createUserInContext(ctx *context.Context, tpl base.TplName, form any, u *user_model.User, overwrites *user_model.CreateUserOverwriteOptions, gothUser *goth.User, allowLink bool, authType auth.Type) (ok bool) {
if err := user_model.CreateUser(ctx, u, overwrites); err != nil {
if allowLink && (user_model.IsErrUserAlreadyExist(err) || user_model.IsErrEmailAlreadyUsed(err)) {
if setting.OAuth2Client.AccountLinking == setting.OAuth2AccountLinkingAuto {
@ -541,10 +558,10 @@ func createUserInContext(ctx *context.Context, tpl base.TplName, form any, u *us
}
// TODO: probably we should respect 'remember' user's choice...
linkAccount(ctx, user, *gothUser, true)
linkAccount(ctx, user, *gothUser, true, authType)
return false // user is already created here, all redirects are handled
} else if setting.OAuth2Client.AccountLinking == setting.OAuth2AccountLinkingLogin {
showLinkingLogin(ctx, *gothUser)
showLinkingLogin(ctx, *gothUser, authType)
return false // user will be created only after linking login
}
}
@ -590,7 +607,7 @@ func createUserInContext(ctx *context.Context, tpl base.TplName, form any, u *us
// handleUserCreated does additional steps after a new user is created.
// It auto-sets admin for the only user, updates the optional external user and
// sends a confirmation email if required.
func handleUserCreated(ctx *context.Context, u *user_model.User, gothUser *goth.User) (ok bool) {
func handleUserCreated(ctx *context.Context, u *user_model.User, gothUser *goth.User, authType auth.Type) (ok bool) {
// Auto-set admin for the only user.
if user_model.CountUsers(ctx, nil) == 1 {
opts := &user_service.UpdateOptions{
@ -606,7 +623,7 @@ func handleUserCreated(ctx *context.Context, u *user_model.User, gothUser *goth.
// update external user information
if gothUser != nil {
if err := externalaccount.UpdateExternalUser(ctx, u, *gothUser); err != nil {
if err := externalaccount.UpdateExternalUser(ctx, u, *gothUser, authType); err != nil {
if !errors.Is(err, util.ErrNotExist) {
log.Error("UpdateExternalUser failed: %v", err)
}

45
routers/web/auth/linkaccount.go
View File

@ -48,13 +48,13 @@ func LinkAccount(ctx *context.Context) {
ctx.Data["SignInLink"] = setting.AppSubURL + "/user/link_account_signin"
ctx.Data["SignUpLink"] = setting.AppSubURL + "/user/link_account_signup"
gothUser := ctx.Session.Get("linkAccountGothUser")
if gothUser == nil {
externalLinkUser := ctx.Session.Get("linkAccountUser")
if externalLinkUser == nil {
ctx.ServerError("UserSignIn", errors.New("not in LinkAccount session"))
return
}
gu, _ := gothUser.(goth.User)
gu := externalLinkUser.(auth.LinkAccountUser).GothUser
uname, err := getUserName(&gu)
if err != nil {
ctx.ServerError("UserSignIn", err)
@ -135,12 +135,14 @@ func LinkAccountPostSignIn(ctx *context.Context) {
ctx.Data["SignInLink"] = setting.AppSubURL + "/user/link_account_signin"
ctx.Data["SignUpLink"] = setting.AppSubURL + "/user/link_account_signup"
gothUser := ctx.Session.Get("linkAccountGothUser")
if gothUser == nil {
externalLinkUserInterface := ctx.Session.Get("linkAccountUser")
if externalLinkUserInterface == nil {
ctx.ServerError("UserSignIn", errors.New("not in LinkAccount session"))
return
}
externalLinkUser := externalLinkUserInterface.(auth.LinkAccountUser)
if ctx.HasError() {
ctx.HTML(http.StatusOK, tplLinkAccount)
return
@ -152,10 +154,10 @@ func LinkAccountPostSignIn(ctx *context.Context) {
return
}
linkAccount(ctx, u, gothUser.(goth.User), signInForm.Remember)
linkAccount(ctx, u, externalLinkUser.GothUser, signInForm.Remember, externalLinkUser.Type)
}
func linkAccount(ctx *context.Context, u *user_model.User, gothUser goth.User, remember bool) {
func linkAccount(ctx *context.Context, u *user_model.User, gothUser goth.User, remember bool, authType auth.Type) {
updateAvatarIfNeed(ctx, gothUser.AvatarURL, u)
// If this user is enrolled in 2FA, we can't sign the user in just yet.
@ -168,7 +170,7 @@ func linkAccount(ctx *context.Context, u *user_model.User, gothUser goth.User, r
return
}
err = externalaccount.LinkAccountToUser(ctx, u, gothUser)
err = externalaccount.LinkAccountToUser(ctx, u, gothUser, authType)
if err != nil {
ctx.ServerError("UserLinkAccount", err)
return
@ -222,14 +224,14 @@ func LinkAccountPostRegister(ctx *context.Context) {
ctx.Data["SignInLink"] = setting.AppSubURL + "/user/link_account_signin"
ctx.Data["SignUpLink"] = setting.AppSubURL + "/user/link_account_signup"
gothUserInterface := ctx.Session.Get("linkAccountGothUser")
if gothUserInterface == nil {
externalLinkUser := ctx.Session.Get("linkAccountUser")
if externalLinkUser == nil {
ctx.ServerError("UserSignUp", errors.New("not in LinkAccount session"))
return
}
gothUser, ok := gothUserInterface.(goth.User)
linkUser, ok := externalLinkUser.(auth.LinkAccountUser)
if !ok {
ctx.ServerError("UserSignUp", fmt.Errorf("session linkAccountGothUser type is %t but not goth.User", gothUserInterface))
ctx.ServerError("UserSignUp", fmt.Errorf("session linkAccountUser type is %t but not goth.User", externalLinkUser))
return
}
@ -275,7 +277,7 @@ func LinkAccountPostRegister(ctx *context.Context) {
}
}
authSource, err := auth.GetActiveOAuth2SourceByName(ctx, gothUser.Provider)
authSource, err := auth.GetActiveAuthSourceByName(ctx, linkUser.GothUser.Provider, linkUser.Type)
if err != nil {
ctx.ServerError("CreateUser", err)
return
@ -285,21 +287,24 @@ func LinkAccountPostRegister(ctx *context.Context) {
Name: form.UserName,
Email: form.Email,
Passwd: form.Password,
LoginType: auth.OAuth2,
LoginType: authSource.Type,
LoginSource: authSource.ID,
LoginName: gothUser.UserID,
LoginName: linkUser.GothUser.UserID,
}
if !createAndHandleCreatedUser(ctx, tplLinkAccount, form, u, nil, &gothUser, false) {
if !createAndHandleCreatedUser(ctx, tplLinkAccount, form, u, nil, &linkUser.GothUser, false, linkUser.Type) {
// error already handled
return
}
source := authSource.Cfg.(*oauth2.Source)
if err := syncGroupsToTeams(ctx, source, &gothUser, u); err != nil {
ctx.ServerError("SyncGroupsToTeams", err)
return
if linkUser.Type == auth.OAuth2 {
source := authSource.Cfg.(*oauth2.Source)
if err := syncGroupsToTeams(ctx, source, &linkUser.GothUser, u); err != nil {
ctx.ServerError("SyncGroupsToTeams", err)
return
}
}
// TODO we will support some form of group mapping for SAML
handleSignIn(ctx, u, false)
}

19
routers/web/auth/oauth.go
View File

@ -841,7 +841,7 @@ func handleAuthorizeError(ctx *context.Context, authErr AuthorizeError, redirect
func SignInOAuth(ctx *context.Context) {
provider := ctx.Params(":provider")
authSource, err := auth.GetActiveOAuth2SourceByName(ctx, provider)
authSource, err := auth.GetActiveAuthSourceByName(ctx, provider, auth.OAuth2)
if err != nil {
ctx.ServerError("SignIn", err)
return
@ -892,7 +892,7 @@ func SignInOAuthCallback(ctx *context.Context) {
}
// first look if the provider is still active
authSource, err := auth.GetActiveOAuth2SourceByName(ctx, provider)
authSource, err := auth.GetActiveAuthSourceByName(ctx, provider, auth.OAuth2)
if err != nil {
ctx.ServerError("SignIn", err)
return
@ -935,7 +935,7 @@ func SignInOAuthCallback(ctx *context.Context) {
if u == nil {
if ctx.Doer != nil {
// attach user to already logged in user
err = externalaccount.LinkAccountToUser(ctx, ctx.Doer, gothUser)
err = externalaccount.LinkAccountToUser(ctx, ctx.Doer, gothUser, auth.OAuth2)
if err != nil {
ctx.ServerError("UserLinkAccount", err)
return
@ -988,7 +988,7 @@ func SignInOAuthCallback(ctx *context.Context) {
u.IsAdmin = isAdmin.ValueOrDefault(false)
u.IsRestricted = isRestricted.ValueOrDefault(false)
if !createAndHandleCreatedUser(ctx, base.TplName(""), nil, u, overwriteDefault, &gothUser, setting.OAuth2Client.AccountLinking != setting.OAuth2AccountLinkingDisabled) {
if !createAndHandleCreatedUser(ctx, base.TplName(""), nil, u, overwriteDefault, &gothUser, setting.OAuth2Client.AccountLinking != setting.OAuth2AccountLinkingDisabled, auth.OAuth2) {
// error already handled
return
}
@ -999,7 +999,7 @@ func SignInOAuthCallback(ctx *context.Context) {
}
} else {
// no existing user is found, request attach or new account
showLinkingLogin(ctx, gothUser)
showLinkingLogin(ctx, gothUser, auth.OAuth2)
return
}
}
@ -1063,9 +1063,12 @@ func getUserAdminAndRestrictedFromGroupClaims(source *oauth2.Source, gothUser *g
return isAdmin, isRestricted
}
func showLinkingLogin(ctx *context.Context, gothUser goth.User) {
func showLinkingLogin(ctx *context.Context, gothUser goth.User, authType auth.Type) {
if err := updateSession(ctx, nil, map[string]any{
"linkAccountGothUser": gothUser,
"linkAccountUser": auth.LinkAccountUser{
Type: authType,
GothUser: gothUser,
},
}); err != nil {
ctx.ServerError("updateSession", err)
return
@ -1144,7 +1147,7 @@ func handleOAuth2SignIn(ctx *context.Context, source *auth.Source, u *user_model
}
// update external user information
if err := externalaccount.UpdateExternalUser(ctx, u, gothUser); err != nil {
if err := externalaccount.UpdateExternalUser(ctx, u, gothUser, auth.OAuth2); err != nil {
if !errors.Is(err, util.ErrNotExist) {
log.Error("UpdateExternalUser failed: %v", err)
}

5
routers/web/auth/openid.go
View File

@ -8,6 +8,7 @@ import (
"net/http"
"net/url"
auth_model "code.gitea.io/gitea/models/auth"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/auth/openid"
"code.gitea.io/gitea/modules/base"
@ -363,7 +364,7 @@ func RegisterOpenIDPost(ctx *context.Context) {
Email: form.Email,
Passwd: password,
}
if !createUserInContext(ctx, tplSignUpOID, form, u, nil, nil, false) {
if !createUserInContext(ctx, tplSignUpOID, form, u, nil, nil, false, auth_model.NoType) {
// error already handled
return
}
@ -379,7 +380,7 @@ func RegisterOpenIDPost(ctx *context.Context) {
return
}
if !handleUserCreated(ctx, u, nil) {
if !handleUserCreated(ctx, u, nil, auth_model.NoType) {
// error already handled
return
}

172
routers/web/auth/saml.go Normal file
View File

@ -0,0 +1,172 @@
// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package auth
import (
"errors"
"fmt"
"net/http"
"strings"
"code.gitea.io/gitea/models/auth"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/modules/web/middleware"
"code.gitea.io/gitea/services/auth/source/saml"
"code.gitea.io/gitea/services/externalaccount"
"github.com/markbates/goth"
)
func SignInSAML(ctx *context.Context) {
provider := ctx.Params(":provider")
loginSource, err := auth.GetActiveAuthSourceByName(ctx, provider, auth.SAML)
if err != nil || loginSource == nil {
ctx.NotFound("SAMLMetadata", err)
return
}
if err = loginSource.Cfg.(*saml.Source).Callout(ctx.Req, ctx.Resp); err != nil {
if strings.Contains(err.Error(), "no provider for ") {
ctx.Error(http.StatusNotFound)
return
}
ctx.ServerError("SignIn", err)
}
}
func SignInSAMLCallback(ctx *context.Context) {
provider := ctx.Params(":provider")
loginSource, err := auth.GetActiveAuthSourceByName(ctx, provider, auth.SAML)
if err != nil || loginSource == nil {
ctx.NotFound("SignInSAMLCallback", err)
return
}
if loginSource == nil {
ctx.ServerError("SignIn", fmt.Errorf("no valid provider found, check configured callback url in provider"))
return
}
u, gothUser, err := samlUserLoginCallback(*ctx, loginSource, ctx.Req, ctx.Resp)
if err != nil {
ctx.ServerError("SignInSAMLCallback", err)
return
}
if u == nil {
if ctx.Doer != nil {
// attach user to already logged in user
err = externalaccount.LinkAccountToUser(ctx, ctx.Doer, gothUser, auth.SAML)
if err != nil {
ctx.ServerError("LinkAccountToUser", err)
return
}
ctx.Redirect(setting.AppSubURL + "/user/settings/security")
return
} else if !setting.Service.AllowOnlyInternalRegistration && false {
// TODO: allow auto registration from saml users (OAuth2 uses the following setting.OAuth2Client.EnableAutoRegistration)
} else {
// no existing user is found, request attach or new account
showLinkingLogin(ctx, gothUser, auth.SAML)
return
}
}
handleSamlSignIn(ctx, loginSource, u, gothUser)
}
func handleSamlSignIn(ctx *context.Context, source *auth.Source, u *user_model.User, gothUser goth.User) {
if err := updateSession(ctx, nil, map[string]any{
"uid": u.ID,
"uname": u.Name,
}); err != nil {
ctx.ServerError("updateSession", err)
return
}
// Clear whatever CSRF cookie has right now, force to generate a new one
ctx.Csrf.DeleteCookie(ctx)
// Register last login
u.SetLastLogin()
// update external user information
if err := externalaccount.UpdateExternalUser(ctx, u, gothUser, auth.SAML); err != nil {
if !errors.Is(err, util.ErrNotExist) {
log.Error("UpdateExternalUser failed: %v", err)
}
}
if err := resetLocale(ctx, u); err != nil {
ctx.ServerError("resetLocale", err)
return
}
if redirectTo := ctx.GetSiteCookie("redirect_to"); len(redirectTo) > 0 {
middleware.DeleteRedirectToCookie(ctx.Resp)
ctx.RedirectToFirst(redirectTo)
return
}
ctx.Redirect(setting.AppSubURL + "/")
}
func samlUserLoginCallback(ctx context.Context, authSource *auth.Source, request *http.Request, response http.ResponseWriter) (*user_model.User, goth.User, error) {
samlSource := authSource.Cfg.(*saml.Source)
gothUser, err := samlSource.Callback(request, response)
if err != nil {
return nil, gothUser, err
}
user := &user_model.User{
LoginName: gothUser.UserID,
LoginType: auth.SAML,
LoginSource: authSource.ID,
}
hasUser, err := user_model.GetUser(ctx, user)
if err != nil {
return nil, goth.User{}, err
}
if hasUser {
return user, gothUser, nil
}
// search in external linked users
externalLoginUser := &user_model.ExternalLoginUser{
ExternalID: gothUser.UserID,
LoginSourceID: authSource.ID,
}
hasUser, err = user_model.GetExternalLogin(ctx, externalLoginUser)
if err != nil {
return nil, goth.User{}, err
}
if hasUser {
user, err = user_model.GetUserByID(request.Context(), externalLoginUser.UserID)
return user, gothUser, err
}
// no user found to login
return nil, gothUser, nil
}
func SAMLMetadata(ctx *context.Context) {
provider := ctx.Params(":provider")
loginSource, err := auth.GetActiveAuthSourceByName(ctx, provider, auth.SAML)
if err != nil || loginSource == nil {
ctx.NotFound("SAMLMetadata", err)
return
}
if err = loginSource.Cfg.(*saml.Source).Metadata(ctx.Req, ctx.Resp); err != nil {
ctx.ServerError("SAMLMetadata", err)
}
}

5
routers/web/web.go
View File

@ -667,6 +667,11 @@ func registerRoutes(m *web.Route) {
m.Get("/{provider}", auth.SignInOAuth)
m.Get("/{provider}/callback", auth.SignInOAuthCallback)
})
m.Group("/saml", func() {
m.Get("/{provider}", auth.SignInSAML) // redir to SAML IDP
m.Post("/{provider}/acs", auth.SignInSAMLCallback)
m.Get("/{provider}/metadata", auth.SAMLMetadata)
})
})
// ***** END: User *****

22
services/auth/source/saml/assert_interface_test.go Normal file
View File

@ -0,0 +1,22 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package saml_test
import (
auth_model "code.gitea.io/gitea/models/auth"
"code.gitea.io/gitea/services/auth"
"code.gitea.io/gitea/services/auth/source/saml"
)
// This test file exists to assert that our Source exposes the interfaces that we expect
// It tightly binds the interfaces and implementation without breaking go import cycles
type sourceInterface interface {
auth_model.Config
auth_model.SourceSettable
auth_model.RegisterableSource
auth.PasswordAuthenticator
}
var _ (sourceInterface) = &saml.Source{}

29
services/auth/source/saml/init.go Normal file
View File

@ -0,0 +1,29 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package saml
import (
"context"
"sync"
"code.gitea.io/gitea/models/auth"
"code.gitea.io/gitea/modules/log"
)
var samlRWMutex = sync.RWMutex{}
func Init(ctx context.Context) error {
loginSources, _ := auth.GetActiveAuthProviderSources(ctx, auth.SAML)
for _, source := range loginSources {
samlSource, ok := source.Cfg.(*Source)
if !ok {
continue
}
err := samlSource.RegisterSource()
if err != nil {
log.Error("Unable to register source: %s due to Error: %v.", source.Name, err)
}
}
return nil
}

38
services/auth/source/saml/name_id_format.go Normal file
View File

@ -0,0 +1,38 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package saml
type NameIDFormat int
const (
SAML11Email NameIDFormat = iota + 1
SAML11Persistent
SAML11Unspecified
SAML20Email
SAML20Persistent
SAML20Transient
SAML20Unspecified
)
const DefaultNameIDFormat NameIDFormat = SAML20Persistent
var NameIDFormatNames = map[NameIDFormat]string{
SAML11Email: "urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress",
SAML11Persistent: "urn:oasis:names:tc:SAML:1.1:nameid-format:persistent",
SAML11Unspecified: "urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified",
SAML20Email: "urn:oasis:names:tc:SAML:2.0:nameid-format:emailAddress",
SAML20Persistent: "urn:oasis:names:tc:SAML:2.0:nameid-format:persistent",
SAML20Transient: "urn:oasis:names:tc:SAML:2.0:nameid-format:transient",
SAML20Unspecified: "urn:oasis:names:tc:SAML:2.0:nameid-format:unspecified",
}
// String returns the name of the NameIDFormat
func (n NameIDFormat) String() string {
return NameIDFormatNames[n]
}
// Int returns the int value of the NameIDFormat
func (n NameIDFormat) Int() int {
return int(n)
}

109
services/auth/source/saml/providers.go Normal file
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@ -0,0 +1,109 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package saml
import (
"context"
"fmt"
"html"
"html/template"
"io"
"net/http"
"sort"
"time"
"code.gitea.io/gitea/models/auth"
"code.gitea.io/gitea/models/db"
"code.gitea.io/gitea/modules/httplib"
"code.gitea.io/gitea/modules/svg"
"code.gitea.io/gitea/modules/util"
)
// Providers is list of known/available providers.
type Providers map[string]Source
var providers = Providers{}
// Provider is an interface for describing a single SAML provider
type Provider interface {
Name() string
IconHTML(size int) template.HTML
}
// AuthSourceProvider is a SAML provider
type AuthSourceProvider struct {
sourceName, iconURL string
}
func (p *AuthSourceProvider) Name() string {
return p.sourceName
}
func (p *AuthSourceProvider) IconHTML(size int) template.HTML {
if p.iconURL != "" {
return template.HTML(fmt.Sprintf(`<img class="gt-object-contain gt-mr-3" width="%d" height="%d" src="%s" alt="%s">`,
size,
size,
html.EscapeString(p.iconURL), html.EscapeString(p.Name()),
))
}
return svg.RenderHTML("gitea-lock-cog", size, "gt-mr-3")
}
func readIdentityProviderMetadata(ctx context.Context, source *Source) ([]byte, error) {
if source.IdentityProviderMetadata != "" {
return []byte(source.IdentityProviderMetadata), nil
}
req := httplib.NewRequest(source.IdentityProviderMetadataURL, "GET")
req.SetTimeout(20*time.Second, time.Minute)
resp, err := req.Response()
if err != nil {
return nil, fmt.Errorf("Unable to contact gitea: %v", err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return nil, err
}
data, err := io.ReadAll(resp.Body)
if err != nil {
return nil, err
}
return data, nil
}
func createProviderFromSource(source *auth.Source) (Provider, error) {
samlCfg, ok := source.Cfg.(*Source)
if !ok {
return nil, fmt.Errorf("invalid SAML source config: %v", samlCfg)
}
return &AuthSourceProvider{sourceName: source.Name, iconURL: samlCfg.IconURL}, nil
}
// GetSAMLProviders returns the list of configured SAML providers
func GetSAMLProviders(ctx context.Context, isActive util.OptionalBool) ([]Provider, error) {
authSources, err := db.Find[auth.Source](ctx, auth.FindSourcesOptions{
IsActive: isActive,
LoginType: auth.SAML,
})
if err != nil {
return nil, err
}
samlProviders := make([]Provider, 0, len(authSources))
for _, source := range authSources {
p, err := createProviderFromSource(source)
if err != nil {
return nil, err
}
samlProviders = append(samlProviders, p)
}
sort.Slice(samlProviders, func(i, j int) bool {
return samlProviders[i].Name() < samlProviders[j].Name()
})
return samlProviders, nil
}

202
services/auth/source/saml/source.go Normal file
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@ -0,0 +1,202 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package saml
import (
"context"
"crypto/rand"
"crypto/rsa"
"crypto/tls"
"crypto/x509"
"encoding/base64"
"encoding/pem"
"encoding/xml"
"errors"
"fmt"
"math/big"
"net/url"
"time"
"code.gitea.io/gitea/models/auth"
"code.gitea.io/gitea/modules/json"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
saml2 "github.com/russellhaering/gosaml2"
"github.com/russellhaering/gosaml2/types"
dsig "github.com/russellhaering/goxmldsig"
)
// Source holds configuration for the SAML login source.
type Source struct {
// IdentityProviderMetadata description: The SAML Identity Provider metadata XML contents (for static configuration of the SAML Service Provider). The value of this field should be an XML document whose root element is `<EntityDescriptor>` or `<EntityDescriptors>`. To escape the value into a JSON string, you may want to use a tool like https://json-escape-text.now.sh.
IdentityProviderMetadata string
// IdentityProviderMetadataURL description: The SAML Identity Provider metadata URL (for dynamic configuration of the SAML Service Provider).
IdentityProviderMetadataURL string
// InsecureSkipAssertionSignatureValidation description: Whether the Service Provider should (insecurely) accept assertions from the Identity Provider without a valid signature.
InsecureSkipAssertionSignatureValidation bool
// NameIDFormat description: The SAML NameID format to use when performing user authentication.
NameIDFormat NameIDFormat
// ServiceProviderCertificate description: The SAML Service Provider certificate in X.509 encoding (begins with "-----BEGIN CERTIFICATE-----"). This certificate is used by the Identity Provider to validate the Service Provider's AuthnRequests and LogoutRequests. It corresponds to the Service Provider's private key (`serviceProviderPrivateKey`). To escape the value into a JSON string, you may want to use a tool like https://json-escape-text.now.sh.
ServiceProviderCertificate string
// ServiceProviderIssuer description: The SAML Service Provider name, used to identify this Service Provider. This is required if the "externalURL" field is not set (as the SAML metadata endpoint is computed as "<externalURL>.auth/saml/metadata"), or when using multiple SAML authentication providers.
ServiceProviderIssuer string
// ServiceProviderPrivateKey description: The SAML Service Provider private key in PKCS#8 encoding (begins with "-----BEGIN PRIVATE KEY-----"). This private key is used to sign AuthnRequests and LogoutRequests. It corresponds to the Service Provider's certificate (`serviceProviderCertificate`). To escape the value into a JSON string, you may want to use a tool like https://json-escape-text.now.sh.
ServiceProviderPrivateKey string
CallbackURL string
IconURL string
// EmailAssertionKey description: Assertion key for user.Email
EmailAssertionKey string
// NameAssertionKey description: Assertion key for user.NickName
NameAssertionKey string
// UsernameAssertionKey description: Assertion key for user.Name
UsernameAssertionKey string
// reference to the authSource
authSource *auth.Source
samlSP *saml2.SAMLServiceProvider
}
func GenerateSAMLSPKeypair() (string, string, error) {
key, err := rsa.GenerateKey(rand.Reader, 4096)
if err != nil {
return "", "", err
}
keyBytes := x509.MarshalPKCS1PrivateKey(key)
keyPem := pem.EncodeToMemory(
&pem.Block{
Type: "RSA PRIVATE KEY",
Bytes: keyBytes,
},
)
now := time.Now()
template := &x509.Certificate{
SerialNumber: big.NewInt(0),
NotBefore: now.Add(-5 * time.Minute),
NotAfter: now.Add(365 * 24 * time.Hour),
KeyUsage: x509.KeyUsageDigitalSignature,
ExtKeyUsage: []x509.ExtKeyUsage{},
BasicConstraintsValid: true,
}
certificate, err := x509.CreateCertificate(rand.Reader, template, template, &key.PublicKey, key)
if err != nil {
return "", "", err
}
certPem := pem.EncodeToMemory(
&pem.Block{
Type: "CERTIFICATE",
Bytes: certificate,
},
)
return string(keyPem), string(certPem), nil
}
func (source *Source) initSAMLSp() error {
source.CallbackURL = setting.AppURL + "user/saml/" + url.PathEscape(source.authSource.Name) + "/acs"
idpMetadata, err := readIdentityProviderMetadata(context.Background(), source)
if err != nil {
return err
}
{
if source.IdentityProviderMetadataURL != "" {
log.Trace(fmt.Sprintf("Identity Provider metadata: %s", source.IdentityProviderMetadataURL), string(idpMetadata))
}
}
metadata := &types.EntityDescriptor{}
err = xml.Unmarshal(idpMetadata, metadata)
if err != nil {
return err
}
certStore := dsig.MemoryX509CertificateStore{
Roots: []*x509.Certificate{},
}
if metadata.IDPSSODescriptor == nil {
return errors.New("saml idp metadata missing IDPSSODescriptor")
}
for _, kd := range metadata.IDPSSODescriptor.KeyDescriptors {
for idx, xcert := range kd.KeyInfo.X509Data.X509Certificates {
if xcert.Data == "" {
return fmt.Errorf("metadata certificate(%d) must not be empty", idx)
}
certData, err := base64.StdEncoding.DecodeString(xcert.Data)
if err != nil {
return err
}
idpCert, err := x509.ParseCertificate(certData)
if err != nil {
return err
}
certStore.Roots = append(certStore.Roots, idpCert)
}
}
var keyStore dsig.X509KeyStore
if source.ServiceProviderCertificate != "" && source.ServiceProviderPrivateKey != "" {
keyPair, err := tls.X509KeyPair([]byte(source.ServiceProviderCertificate), []byte(source.ServiceProviderPrivateKey))
if err != nil {
return err
}
keyPair.Leaf, err = x509.ParseCertificate(keyPair.Certificate[0])
if err != nil {
return err
}
keyStore = dsig.TLSCertKeyStore(keyPair)
}
source.samlSP = &saml2.SAMLServiceProvider{
IdentityProviderSSOURL: metadata.IDPSSODescriptor.SingleSignOnServices[0].Location,
IdentityProviderIssuer: metadata.EntityID,
AudienceURI: setting.AppURL + "user/saml/" + url.PathEscape(source.authSource.Name) + "/metadata",
AssertionConsumerServiceURL: source.CallbackURL,
SkipSignatureValidation: source.InsecureSkipAssertionSignatureValidation,
NameIdFormat: source.NameIDFormat.String(),
IDPCertificateStore: &certStore,
SignAuthnRequests: source.ServiceProviderCertificate != "" && source.ServiceProviderPrivateKey != "",
SPKeyStore: keyStore,
ServiceProviderIssuer: setting.AppURL + "user/saml/" + url.PathEscape(source.authSource.Name) + "/metadata",
}
return nil
}
// FromDB fills up a SAML from serialized format.
func (source *Source) FromDB(bs []byte) error {
if err := json.UnmarshalHandleDoubleEncode(bs, &source); err != nil {
return err
}
return source.initSAMLSp()
}
// ToDB exports a SAML to a serialized format.
func (source *Source) ToDB() ([]byte, error) {
return json.Marshal(source)
}
// SetAuthSource sets the related AuthSource
func (source *Source) SetAuthSource(authSource *auth.Source) {
source.authSource = authSource
}
func init() {
auth.RegisterTypeConfig(auth.SAML, &Source{})
}

16
services/auth/source/saml/source_authenticate.go Normal file
View File

@ -0,0 +1,16 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package saml
import (
"context"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/services/auth/source/db"
)
// Authenticate falls back to the db authenticator
func (source *Source) Authenticate(ctx context.Context, user *user_model.User, login, password string) (*user_model.User, error) {
return db.Authenticate(ctx, user, login, password)
}

89
services/auth/source/saml/source_callout.go Normal file
View File

@ -0,0 +1,89 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package saml
import (
"fmt"
"net/http"
"strings"
"github.com/markbates/goth"
)
// Callout redirects request/response pair to authenticate against the provider
func (source *Source) Callout(request *http.Request, response http.ResponseWriter) error {
samlRWMutex.RLock()
defer samlRWMutex.RUnlock()
if _, ok := providers[source.authSource.Name]; !ok {
return fmt.Errorf("no provider for this saml")
}
authURL, err := providers[source.authSource.Name].samlSP.BuildAuthURL("")
if err == nil {
http.Redirect(response, request, authURL, http.StatusTemporaryRedirect)
}
return err
}
// Callback handles SAML callback, resolve to a goth user and send back to original url
// this will trigger a new authentication request, but because we save it in the session we can use that
func (source *Source) Callback(request *http.Request, response http.ResponseWriter) (goth.User, error) {
samlRWMutex.RLock()
defer samlRWMutex.RUnlock()
user := goth.User{
Provider: source.authSource.Name,
}
samlResponse := request.FormValue("SAMLResponse")
assertions, err := source.samlSP.RetrieveAssertionInfo(samlResponse)
if err != nil {
return user, err
}
if assertions.WarningInfo.OneTimeUse {
return user, fmt.Errorf("SAML response contains one time use warning")
}
if assertions.WarningInfo.ProxyRestriction != nil {
return user, fmt.Errorf("SAML response contains proxy restriction warning: %v", assertions.WarningInfo.ProxyRestriction)
}
if assertions.WarningInfo.NotInAudience {
return user, fmt.Errorf("SAML response contains audience warning")
}
if assertions.WarningInfo.InvalidTime {
return user, fmt.Errorf("SAML response contains invalid time warning")
}
samlMap := make(map[string]string)
for key, value := range assertions.Values {
keyParsed := strings.ToLower(key[strings.LastIndex(key, "/")+1:]) // Uses the trailing slug as the key name.
valueParsed := value.Values[0].Value
samlMap[keyParsed] = valueParsed
}
user.UserID = assertions.NameID
if user.UserID == "" {
return user, fmt.Errorf("no nameID found in SAML response")
}
// email
if _, ok := samlMap[source.EmailAssertionKey]; !ok {
user.Email = samlMap[source.EmailAssertionKey]
}
// name
if _, ok := samlMap[source.NameAssertionKey]; !ok {
user.NickName = samlMap[source.NameAssertionKey]
}
// username
if _, ok := samlMap[source.UsernameAssertionKey]; !ok {
user.Name = samlMap[source.UsernameAssertionKey]
}
// TODO: utilize groups once mapping is supported
return user, nil
}

32
services/auth/source/saml/source_metadata.go Normal file
View File

@ -0,0 +1,32 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package saml
import (
"encoding/xml"
"fmt"
"net/http"
)
// Metadata redirects request/response pair to authenticate against the provider
func (source *Source) Metadata(request *http.Request, response http.ResponseWriter) error {
samlRWMutex.RLock()
defer samlRWMutex.RUnlock()
if _, ok := providers[source.authSource.Name]; !ok {
return fmt.Errorf("provider does not exist")
}
metadata, err := providers[source.authSource.Name].samlSP.Metadata()
if err != nil {
return err
}
buf, err := xml.Marshal(metadata)
if err != nil {
return err
}
response.Header().Set("Content-Type", "application/samlmetadata+xml; charset=utf-8")
_, _ = response.Write(buf)
return nil
}

23
services/auth/source/saml/source_register.go Normal file
View File

@ -0,0 +1,23 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package saml
// RegisterSource causes an OAuth2 configuration to be registered
func (source *Source) RegisterSource() error {
samlRWMutex.Lock()
defer samlRWMutex.Unlock()
if err := source.initSAMLSp(); err != nil {
return err
}
providers[source.authSource.Name] = *source
return nil
}
// UnregisterSource causes an SAML configuration to be unregistered
func (source *Source) UnregisterSource() error {
samlRWMutex.Lock()
defer samlRWMutex.Unlock()
delete(providers, source.authSource.Name)
return nil
}

11
services/externalaccount/link.go
View File

@ -7,9 +7,8 @@ import (
"context"
"fmt"
"code.gitea.io/gitea/models/auth"
user_model "code.gitea.io/gitea/models/user"
"github.com/markbates/goth"
)
// Store represents a thing that stores things
@ -21,10 +20,12 @@ type Store interface {
// LinkAccountFromStore links the provided user with a stored external user
func LinkAccountFromStore(ctx context.Context, store Store, user *user_model.User) error {
gothUser := store.Get("linkAccountGothUser")
if gothUser == nil {
externalLinkUserInterface := store.Get("linkAccountUser")
if externalLinkUserInterface == nil {
return fmt.Errorf("not in LinkAccount session")
}
return LinkAccountToUser(ctx, user, gothUser.(goth.User))
externalLinkUser := externalLinkUserInterface.(auth.LinkAccountUser)
return LinkAccountToUser(ctx, user, externalLinkUser.GothUser, externalLinkUser.Type)
}

12
services/externalaccount/user.go
View File

@ -16,8 +16,8 @@ import (
"github.com/markbates/goth"
)
func toExternalLoginUser(ctx context.Context, user *user_model.User, gothUser goth.User) (*user_model.ExternalLoginUser, error) {
authSource, err := auth.GetActiveOAuth2SourceByName(ctx, gothUser.Provider)
func toExternalLoginUser(ctx context.Context, user *user_model.User, gothUser goth.User, authType auth.Type) (*user_model.ExternalLoginUser, error) {
authSource, err := auth.GetActiveAuthSourceByName(ctx, gothUser.Provider, authType)
if err != nil {
return nil, err
}
@ -43,8 +43,8 @@ func toExternalLoginUser(ctx context.Context, user *user_model.User, gothUser go
}
// LinkAccountToUser link the gothUser to the user
func LinkAccountToUser(ctx context.Context, user *user_model.User, gothUser goth.User) error {
externalLoginUser, err := toExternalLoginUser(ctx, user, gothUser)
func LinkAccountToUser(ctx context.Context, user *user_model.User, gothUser goth.User, authType auth.Type) error {
externalLoginUser, err := toExternalLoginUser(ctx, user, gothUser, authType)
if err != nil {
return err
}
@ -71,8 +71,8 @@ func LinkAccountToUser(ctx context.Context, user *user_model.User, gothUser goth
}
// UpdateExternalUser updates external user's information
func UpdateExternalUser(ctx context.Context, user *user_model.User, gothUser goth.User) error {
externalLoginUser, err := toExternalLoginUser(ctx, user, gothUser)
func UpdateExternalUser(ctx context.Context, user *user_model.User, gothUser goth.User, authType auth.Type) error {
externalLoginUser, err := toExternalLoginUser(ctx, user, gothUser, authType)
if err != nil {
return err
}

15
services/forms/auth_form.go
View File

@ -1,3 +1,4 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// Copyright 2014 The Gogs Authors. All rights reserved.
// SPDX-License-Identifier: MIT
@ -15,7 +16,7 @@ import (
// AuthenticationForm form for authentication
type AuthenticationForm struct {
ID int64
Type int `binding:"Range(2,7)"`
Type int `binding:"Range(2,9)"`
Name string `binding:"Required;MaxSize(30)"`
Host string
Port int
@ -82,6 +83,18 @@ type AuthenticationForm struct {
SSPIDefaultLanguage string
GroupTeamMap string `binding:"ValidGroupTeamMap"`
GroupTeamMapRemoval bool
// SAML Settings
NameIDFormat int
IdentityProviderMetadata string
IdentityProviderMetadataURL string
InsecureSkipAssertionSignatureValidation bool
ServiceProviderCertificate string
ServiceProviderPrivateKey string
EmailAssertionKey string
NameAssertionKey string
UsernameAssertionKey string
SAMLIconURL string
}
// Validate validates fields

66
templates/admin/auth/edit.tmpl
View File

@ -367,6 +367,69 @@
</div>
{{end}}
<!-- SAML -->
{{if .Source.IsSAML}}
{{$cfg:=.Source.Cfg}}
<div class="inline required field">
<label>{{ctx.Locale.Tr "admin.auths.saml_nameidformat"}}</label>
<div class="ui selection type dropdown">
<input type="hidden" id="name_id_format" name="name_id_format" value="{{$cfg.NameIDFormat}}">
<div class="text">{{.CurrentNameIDFormat}}</div>
{{svg "octicon-triangle-down" 14 "dropdown icon"}}
<div class="menu">
{{range .NameIDFormats}}
<div class="item" data-value="{{.Type.Int}}">{{.Name}}</div>
{{end}}
</div>
</div>
</div>
<div class="optional field">
<label for="saml_icon_url">{{ctx.Locale.Tr "admin.auths.saml_icon_url"}}</label>
<input id="saml_icon_url" name="saml_icon_url" value="{{$cfg.IconURL}}">
</div>
<div class="field">
<label for="identity_provider_metadata_url">{{ctx.Locale.Tr "admin.auths.saml_identity_provider_metadata_url"}}</label>
<input id="identity_provider_metadata_url" name="identity_provider_metadata_url" value="{{$cfg.IdentityProviderMetadataURL}}">
</div>
<div class="field">
<label for="identity_provider_metadata">{{ctx.Locale.Tr "admin.auths.saml_identity_provider_metadata"}}</label>
<textarea rows=2 id="identity_provider_metadata" name="identity_provider_metadata">{{$cfg.IdentityProviderMetadata}}</textarea>
</div>
<div class="inline field">
<div class="ui checkbox">
<label><strong>{{ctx.Locale.Tr "admin.auths.saml_insecure_skip_assertion_signature_validation"}}</strong></label>
<input name="insecure_skip_assertion_signature_validation" type="checkbox" {{if $cfg.InsecureSkipAssertionSignatureValidation}}checked{{end}}>
</div>
</div>
<div class=" field">
<label for="service_provider_certificate">{{ctx.Locale.Tr "admin.auths.saml_service_provider_certificate"}}</label>
<textarea rows=2 id="service_provider_certificate" name="service_provider_certificate">{{$cfg.ServiceProviderCertificate}}</textarea>
</div>
<div class=" field">
<label for="service_provider_private_key">{{ctx.Locale.Tr "admin.auths.saml_service_provider_private_key"}}</label>
<textarea rows=2 id="service_provider_private_key" name="service_provider_private_key">{{$cfg.ServiceProviderPrivateKey}}</textarea>
</div>
<div class="field">
<label for="email_assertion_key">{{ctx.Locale.Tr "admin.auths.saml_identity_provider_email_assertion_key"}}</label>
<input id="email_assertion_key" name="email_assertion_key" value="{{if not $cfg.EmailAssertionKey}}http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress{{else}}{{$cfg.EmailAssertionKey}}{{end}}">
</div>
<div class="field">
<label for="name_assertion_key">{{ctx.Locale.Tr "admin.auths.saml_identity_provider_name_assertion_key"}}</label>
<input id="name_assertion_key" name="name_assertion_key" value="{{if not $cfg.NameAssertionKey}}http://schemas.xmlsoap.org/claims/CommonName{{else}}{{$cfg.NameAssertionKey}}{{end}}">
</div>
<div class="field">
<label for="username_assertion_key">{{ctx.Locale.Tr "admin.auths.saml_identity_provider_username_assertion_key"}}</label>
<input id="username_assertion_key" name="username_assertion_key" value="{{if not $cfg.UsernameAssertionKey}}http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name{{else}}{{$cfg.UsernameAssertionKey}}{{end}}">
</div>
{{end}}
<!-- SSPI -->
{{if .Source.IsSSPI}}
{{$cfg:=.Source.Cfg}}
@ -441,6 +504,9 @@
<h5>GMail Settings:</h5>
<p>Host: smtp.gmail.com, Port: 587, Enable TLS Encryption: true</p>
<h5>SAML Settings:</h5>
<p>{{ctx.Locale.Tr "admin.auths.tips.saml"}}</p>
<h5 class="oauth2">{{ctx.Locale.Tr "admin.auths.tips.oauth2.general"}}:</h5>
<p class="oauth2">{{ctx.Locale.Tr "admin.auths.tips.oauth2.general.tip"}} <b id="oauth2-callback-url"></b></p>
</div>

6
templates/admin/auth/new.tmpl
View File

@ -53,6 +53,9 @@
<!-- SSPI -->
{{template "admin/auth/source/sspi" .}}
<!-- SAML -->
{{template "admin/auth/source/saml" .}}
<div class="ldap field">
<div class="ui checkbox">
<label><strong>{{ctx.Locale.Tr "admin.auths.attributes_in_bind"}}</strong></label>
@ -85,6 +88,9 @@
<h5>GMail Settings:</h5>
<p>Host: smtp.gmail.com, Port: 587, Enable TLS Encryption: true</p>
<h5>SAML Settings:</h5>
<p>{{ctx.Locale.Tr "admin.auths.tips.saml"}}</p>
<h5 class="oauth2">{{ctx.Locale.Tr "admin.auths.tips.oauth2.general"}}:</h5>
<p class="oauth2">{{ctx.Locale.Tr "admin.auths.tips.oauth2.general.tip"}} <b id="oauth2-callback-url"></b></p>

62
templates/admin/auth/source/saml.tmpl Normal file
View File

@ -0,0 +1,62 @@
<div class="saml field {{if not (eq .type 8)}}gt-hidden{{end}}">
<div class="inline required field">
<label>{{ctx.Locale.Tr "admin.auths.saml_nameidformat"}}</label>
<div class="ui selection type dropdown">
<input type="hidden" id="name_id_format" name="name_id_format" value="{{.name_id_format}}">
<div class="text">{{.CurrentNameIDFormat}}</div>
{{svg "octicon-triangle-down" 14 "dropdown icon"}}
<div class="menu">
{{range .NameIDFormats}}
<div class="item" data-value="{{.Type.Int}}">{{.Name}}</div>
{{end}}
</div>
</div>
</div>
<div class="optional field">
<label for="saml_icon_url">{{ctx.Locale.Tr "admin.auths.saml_icon_url"}}</label>
<input id="saml_icon_url" name="saml_icon_url" value="{{.SAMLIconURL}}">
</div>
<div class="field">
<label for="identity_provider_metadata_url">{{ctx.Locale.Tr "admin.auths.saml_identity_provider_metadata_url"}}</label>
<input id="identity_provider_metadata_url" name="identity_provider_metadata_url" value="{{.IdentityProviderMetadataURL}}">
</div>
<div class="field">
<label for="identity_provider_metadata">{{ctx.Locale.Tr "admin.auths.saml_identity_provider_metadata"}}</label>
<textarea rows=2 id="identity_provider_metadata" name="identity_provider_metadata" value="{{.IdentityProviderMetadata}}"></textarea>
</div>
<div class="inline field">
<div class="ui checkbox">
<label><strong>{{ctx.Locale.Tr "admin.auths.saml_insecure_skip_assertion_signature_validation"}}</strong></label>
<input name="insecure_skip_assertion_signature_validation" type="checkbox" {{if .InsecureSkipAssertionSignatureValidation}}checked{{end}}>
</div>
</div>
<div class="field">
<label for="service_provider_certificate">{{ctx.Locale.Tr "admin.auths.saml_service_provider_certificate"}}</label>
<textarea rows=2 id="service_provider_certificate" name="service_provider_certificate" value="{{.ServiceProviderCertificate}}"></textarea>
</div>
<div class="field">
<label for="service_provider_private_key">{{ctx.Locale.Tr "admin.auths.saml_service_provider_private_key"}}</label>
<textarea rows=2 id="service_provider_private_key" name="service_provider_private_key" value="{{.ServiceProviderPrivateKey}}"></textarea>
</div>
<div class="field">
<label for="email_assertion_key">{{ctx.Locale.Tr "admin.auths.saml_identity_provider_email_assertion_key"}}</label>
<input id="email_assertion_key" name="email_assertion_key" value="{{if not .EmailAssertionKey}}http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress{{else}}{{.EmailAssertionKey}}{{end}}">
</div>
<div class="field">
<label for="name_assertion_key">{{ctx.Locale.Tr "admin.auths.saml_identity_provider_name_assertion_key"}}</label>
<input id="name_assertion_key" name="name_assertion_key" value="{{if not .NameAssertionKey}}http://schemas.xmlsoap.org/claims/CommonName{{else}}{{.NameAssertionKey}}{{end}}">
</div>
<div class="field">
<label for="username_assertion_key">{{ctx.Locale.Tr "admin.auths.saml_identity_provider_username_assertion_key"}}</label>
<input id="username_assertion_key" name="username_assertion_key" value="{{if not .UsernameAssertionKey}}http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name{{else}}{{.UsernameAssertionKey}}{{end}}">
</div>
</div>

17
templates/user/auth/signin_inner.tmpl
View File

@ -69,5 +69,22 @@
</div>
</div>
{{end}}
{{if .SAMLProviders}}
<div class="divider divider-text">
{{.locale.Tr "sign_in_or"}}
</div>
<div id="saml-login-navigator" class="gt-py-2">
<div class="gt-df gt-fc gt-jc">
<div id="saml-login-navigator-inner" class="gt-df gt-fc gt-fw gt-ac gt-gap-3">
{{range $provider := .SAMLProviders}}
<a class="{{$provider.Name}} ui button gt-df gt-ac gt-jc gt-py-3 saml-login-link" href="{{AppSubUrl}}/user/saml/{{$provider.Name}}">
{{.IconHTML 28}}
{{ctx.Locale.Tr "sign_in_with_provider" $provider.Name}}
</a>
{{end}}
</div>
</div>
</div>
{{end}}
</form>
</div>

17
tests/integration/README.md
View File

@ -110,3 +110,20 @@ SLOW_FLUSH = 5S ; 5s is the default value
```bash
GITEA_SLOW_TEST_TIME="10s" GITEA_SLOW_FLUSH_TIME="5s" make test-sqlite
```
## Running SimpleSAML for testing SAML locally
```shell
docker run \
-p 8080:8080 \
-p 8443:8443 \
-e SIMPLESAMLPHP_SP_ENTITY_ID=http://localhost:3003/user/saml/test-sp/metadata \
-e SIMPLESAMLPHP_SP_ASSERTION_CONSUMER_SERVICE=http://localhost:3003/user/saml/test-sp/acs \
-e SIMPLESAMLPHP_SP_SINGLE_LOGOUT_SERVICE=http://localhost:3003/user/saml/test-sp/acs \
--add-host=localhost:192.168.65.2 \
-d allspice/simple-saml
```
```shell
TEST_SIMPLESAML_URL=localhost:8080 make test-sqlite#TestSAMLRegistration
```

150
tests/integration/saml_test.go Normal file
View File

@ -0,0 +1,150 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package integration
import (
"crypto/tls"
"crypto/x509"
"fmt"
"io"
"net/http"
"net/http/cookiejar"
"net/url"
"os"
"regexp"
"strings"
"testing"
"time"
"code.gitea.io/gitea/models/auth"
"code.gitea.io/gitea/models/db"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/test"
"code.gitea.io/gitea/services/auth/source/saml"
"code.gitea.io/gitea/tests"
"github.com/stretchr/testify/assert"
)
func TestSAMLRegistration(t *testing.T) {
defer tests.PrepareTestEnv(t)()
samlURL := "localhost:8080"
if os.Getenv("CI") == "" || !setting.Database.Type.IsPostgreSQL() {
// Make it possible to run tests against a local simplesaml instance
samlURL = os.Getenv("TEST_SIMPLESAML_URL")
if samlURL == "" {
t.Skip("TEST_SIMPLESAML_URL not set and not running in CI")
return
}
}
privateKey, cert, err := saml.GenerateSAMLSPKeypair()
assert.NoError(t, err)
// verify that the keypair can be parsed
keyPair, err := tls.X509KeyPair([]byte(cert), []byte(privateKey))
assert.NoError(t, err)
keyPair.Leaf, err = x509.ParseCertificate(keyPair.Certificate[0])
assert.NoError(t, err)
assert.NoError(t, auth.CreateSource(db.DefaultContext, &auth.Source{
Type: auth.SAML,
Name: "test-sp",
IsActive: true,
IsSyncEnabled: false,
Cfg: &saml.Source{
IdentityProviderMetadata: "",
IdentityProviderMetadataURL: fmt.Sprintf("http://%s/simplesaml/saml2/idp/metadata.php", samlURL),
InsecureSkipAssertionSignatureValidation: false,
NameIDFormat: 4,
ServiceProviderCertificate: "", // SimpleSAMLPhp requires that the SP certificate be specified in the server configuration rather than SP metadata
ServiceProviderPrivateKey: "",
EmailAssertionKey: "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress",
NameAssertionKey: "http://schemas.xmlsoap.org/claims/CommonName",
UsernameAssertionKey: "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name",
IconURL: "",
},
}))
// check the saml metadata url
req := NewRequest(t, "GET", "/user/saml/test-sp/metadata")
MakeRequest(t, req, http.StatusOK)
req = NewRequest(t, "GET", "/user/saml/test-sp")
resp := MakeRequest(t, req, http.StatusTemporaryRedirect)
jar, err := cookiejar.New(nil)
assert.NoError(t, err)
client := http.Client{
Timeout: 30 * time.Second,
Jar: jar,
}
httpReq, err := http.NewRequest("GET", test.RedirectURL(resp), nil)
assert.NoError(t, err)
var formRedirectURL *url.URL
client.CheckRedirect = func(req *http.Request, via []*http.Request) error {
// capture the redirected destination to use in POST request
formRedirectURL = req.URL
return nil
}
res, err := client.Do(httpReq)
client.CheckRedirect = nil
assert.NoError(t, err)
assert.Equal(t, http.StatusOK, res.StatusCode)
assert.NotNil(t, formRedirectURL)
form := url.Values{
"username": {"user1"},
"password": {"user1pass"},
}
httpReq, err = http.NewRequest("POST", formRedirectURL.String(), strings.NewReader(form.Encode()))
assert.NoError(t, err)
httpReq.Header.Add("Content-Type", "application/x-www-form-urlencoded")
res, err = client.Do(httpReq)
assert.NoError(t, err)
assert.Equal(t, http.StatusOK, res.StatusCode)
body, err := io.ReadAll(res.Body)
assert.NoError(t, err)
samlResMatcher := regexp.MustCompile(`<input.*?name="SAMLResponse".*?value="([^"]+)".*?>`)
matches := samlResMatcher.FindStringSubmatch(string(body))
assert.Len(t, matches, 2)
assert.NoError(t, res.Body.Close())
session := emptyTestSession(t)
req = NewRequestWithValues(t, "POST", "/user/saml/test-sp/acs", map[string]string{
"SAMLResponse": matches[1],
})
resp = session.MakeRequest(t, req, http.StatusSeeOther)
assert.Equal(t, test.RedirectURL(resp), "/user/link_account")
csrf := GetCSRF(t, session, test.RedirectURL(resp))
// link the account
req = NewRequestWithValues(t, "POST", "/user/link_account_signup", map[string]string{
"_csrf": csrf,
"user_name": "samluser",
"email": "saml@example.com",
})
resp = session.MakeRequest(t, req, http.StatusSeeOther)
assert.Equal(t, test.RedirectURL(resp), "/")
// verify that the user was created
u, err := user_model.GetUserByEmail(db.DefaultContext, "saml@example.com")
assert.NoError(t, err)
assert.NotNil(t, u)
assert.Equal(t, "samluser", u.Name)
}

8
web_src/js/features/admin/common.js
View File

@ -103,9 +103,9 @@ export function initAdminCommon() {
// New authentication
if ($('.admin.new.authentication').length > 0) {
$('#auth_type').on('change', function () {
hideElem($('.ldap, .dldap, .smtp, .pam, .oauth2, .has-tls, .search-page-size, .sspi'));
hideElem($('.ldap, .dldap, .smtp, .pam, .oauth2, .has-tls, .search-page-size, .sspi, .saml'));
$('.ldap input[required], .binddnrequired input[required], .dldap input[required], .smtp input[required], .pam input[required], .oauth2 input[required], .has-tls input[required], .sspi input[required]').removeAttr('required');
$('.ldap input[required], .binddnrequired input[required], .dldap input[required], .smtp input[required], .pam input[required], .oauth2 input[required], .has-tls input[required], .sspi input[required], .saml input[required]').removeAttr('required');
$('.binddnrequired').removeClass('required');
const authType = $(this).val();
@ -137,6 +137,10 @@ export function initAdminCommon() {
showElem($('.sspi'));
$('.sspi div.required input').attr('required', 'required');
break;
case '8': // SAML
showElem($('.saml'));
$('.saml div.required input').attr('required', 'required');
break;
}
if (authType === '2' || authType === '5') {
onSecurityProtocolChange();

21
web_src/js/features/user-auth.js
View File

@ -20,3 +20,24 @@ export function initUserAuthOauth2() {
});
}
}
export function initUserAuthSAML() {
const outer = document.getElementById('saml-login-navigator');
if (!outer) return;
const inner = document.getElementById('saml-login-navigator-inner');
checkAppUrl();
for (const link of outer.querySelectorAll('.saml-login-link')) {
link.addEventListener('click', () => {
inner.classList.add('gt-invisible');
outer.classList.add('is-loading');
setTimeout(() => {
// recover previous content to let user try again
// usually redirection will be performed before this action
outer.classList.remove('is-loading');
inner.classList.remove('gt-invisible');
}, 5000);
});
}
}

6
web_src/js/index.js
View File

@ -23,7 +23,10 @@ import {initFindFileInRepo} from './features/repo-findfile.js';
import {initCommentContent, initMarkupContent} from './markup/content.js';
import {initPdfViewer} from './render/pdf.js';
import {initUserAuthOauth2} from './features/user-auth.js';
import {
initUserAuthOauth2,
initUserAuthSAML
} from './features/user-auth.js';
import {
initRepoIssueDue,
initRepoIssueReferenceRepositorySearch,
@ -179,6 +182,7 @@ onDomReady(() => {
initCaptcha();
initUserAuthOauth2();
initUserAuthSAML();
initUserAuthWebAuthn();
initUserAuthWebAuthnRegister();
initUserSettings();