SAML IdP overview
Casdoor can act as a SAML 2.0 IdP. This page covers SP configuration, Casdoor IdP settings, and SAML attributes.
Configuration in the SP (service provider)
The SP typically needs Single Sign-On URL, Issuer, and Public Certificate. Most SPs can fill these from the Casdoor XML Metadata URL or by uploading the metadata file.
Casdoor metadata URL format: <casdoor-endpoint>/api/saml/metadata?application=admin/<application-name>
Example: if Casdoor is at https://door.casdoor.com and the application is app-built-in:
https://door.casdoor.com/api/saml/metadata?application=admin/app-built-in
The metadata URL is also on the application edit page; copy it and open in a browser to download the XML.

Конфігурація в Casdoor IdP
Casdoor підтримує як GET, так і POST SAMLResponse. Configure the application in Casdoor to match the SAMLResponse binding (GET or POST) that your SP supports.
When integrating Casdoor as a SAML IdP with external identity providers (like Azure AD), the /api/acs endpoint receives SAML responses. This endpoint is configured to accept cross-origin POST requests, allowing IdPs from different domains to send authentication data.
Якщо ви заповните Reply URL, Casdoor надішле SAMLResponse за допомогою запиту POST. Якщо URL відповіді порожній, Casdoor використовуватиме запит GET. Ви можете запитати, як Casdoor знає Reply URL SP, якщо Reply URL порожній. Насправді, Casdoor може отримати URL під назвою AssertionConsumerServiceURL, аналізуючи SAMLRequest і надіслати запит з SAMLResponse до AssertionConsumerServiceURL. Reply URL перезапише AssertionConsumerServiceURL у SAMLRequest.
-
Reply URL: Введіть URL ACS, який перевіряє SAML відповідь.

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Redirect URL: Введіть унікальне ім'я. Це може називатися
AudienceабоEntity IDу вашому SP. Переконайтеся, що ви заповнили той самийRedirect URLтут, як і у вашому SP.
SAML attributes
If the SP requires extra attributes in the SAML response, add them in the SAML attributes table and map user fields as needed.
If the service provider only needs NameID and not extra user attributes (Email, Name, DisplayName, Roles), enable Disable SAML attributes in the application settings. When enabled, Casdoor will omit these attributes from the SAML response, which can help avoid XML namespace issues with certain SPs that have strict validation requirements.
Assertion signature control
SAML responses from Casdoor are always signed to ensure authenticity. However, some service providers may not support or require signed assertions within the response itself. Starting from version 2.81.0, Casdoor added assertion signatures following SAML 2.0 best practices, but this caused compatibility issues with certain SPs like Sentry.
If a service provider does not handle signed assertions correctly, disable assertion signing while keeping the response envelope signed. Toggle the Enable SAML assertion signature option in your application settings to control this behavior. When disabled, Casdoor will sign only the SAML response envelope, which maintains security while ensuring compatibility with a wider range of service providers.
For example
| Ім'я | Name format | Value |
|---|---|---|
https://www.aliyun.com/SAML-Role/Attributes/RoleSessionName | Unspecified | $user.name |
https://www.aliyun.com/SAML-Role/Attributes/Role | Unspecified | acs:ram::1879818006829152:role/$user.roles,acs:ram::1879818006829152:saml-provider/testa |
will generate response with external saml:Attribute
<saml:Attribute Name="https://www.aliyun.com/SAML-Role/Attributes/RoleSessionName" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:unspecified">
<saml:AttributeValue xsi:type="xs:string">admi122n@outlook.com</saml:AttributeValue>
</saml:Attribute>
<saml:Attribute Name="https://www.aliyun.com/SAML-Role/Attributes/Role" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:unspecified">
<saml:AttributeValue xsi:type="xs:string"> acs:ram::1879818006829152:role/role1,acs:ram::1879818006829152:saml-provider/testa</saml:AttributeValue>
<saml:AttributeValue xsi:type="xs:string"> acs:ram::1879818006829152:role/role2,acs:ram::1879818006829152:saml-provider/testa</saml:AttributeValue>
</saml:Attribute>
We only support insert $user.owner,$user.name,$user.email,$user.id,$user.phone,$user.roles,$user.permissions,$user.groups
Профіль користувача
Після успішного входу в систему профіль користувача у поверненому SAMLResponse від Casdoor має три поля. Атрибути в XML і атрибути користувача в Casdoor відображаються наступним чином:
| Назва XML атрибуту | Поле користувача |
|---|---|
| Електронна пошта | |
| DisplayName | displayName |
| Name | name |
See https://en.wikipedia.org/wiki/SAML_2.0 for more information about SAML and its different versions.
Приклад
gosaml2 - це реалізація SAML 2.0 для постачальників послуг на осно ві etree та goxmldsig, чиста реалізація цифрових підписів XML на Go. Ми використовуємо цю бібліотеку для тестування SAML 2.0 у Casdoor, як показано нижче.
Example: Casdoor at http://localhost:7001/, application app-built-in in org built-in. Add http://localhost:6900/acs/example and http://localhost:6900/saml/acs/example to Redirect URLs in app-built-in.
import (
"crypto/x509"
"fmt"
"net/http"
"io/ioutil"
"encoding/base64"
"encoding/xml"
saml2 "github.com/russellhaering/gosaml2"
"github.com/russellhaering/gosaml2/types"
dsig "github.com/russellhaering/goxmldsig"
)
func main() {
res, err := http.Get("http://localhost:7001/api/saml/metadata?application=admin/app-built-in")
if err != nil {
panic(err)
}
rawMetadata, err := ioutil.ReadAll(res.Body)
if err != nil {
panic(err)
}
metadata := &types.EntityDescriptor{}
err = xml.Unmarshal(rawMetadata, metadata)
if err != nil {
panic(err)
}
certStore := dsig.MemoryX509CertificateStore{
Roots: []*x509.Certificate{},
}
for _, kd := range metadata.IDPSSODescriptor.KeyDescriptors {
for idx, xcert := range kd.KeyInfo.X509Data.X509Certificates {
if xcert.Data == "" {
panic(fmt.Errorf("metadata certificate(%d) must not be empty", idx))
}
certData, err := base64.StdEncoding.DecodeString(xcert.Data)
if err != nil {
panic(err)
}
idpCert, err := x509.ParseCertificate(certData)
if err != nil {
panic(err)
}
certStore.Roots = append(certStore.Roots, idpCert)
}
}
randomKeyStore := dsig.RandomKeyStoreForTest()
sp := &saml2.SAMLServiceProvider{
IdentityProviderSSOURL: metadata.IDPSSODescriptor.SingleSignOnServices[0].Location,
IdentityProviderIssuer: metadata.EntityID,
ServiceProviderIssuer: "http://localhost:6900/acs/example",
AssertionConsumerServiceURL: "http://localhost:6900/v1/_saml_callback",
SignAuthnRequests: true,
AudienceURI: "http://localhost:6900/saml/acs/example",
IDPCertificateStore: &certStore,
SPKeyStore: randomKeyStore,
}
http.HandleFunc("/v1/_saml_callback", func(rw http.ResponseWriter, req *http.Request) {
err := req.ParseForm()
if err != nil {
rw.WriteHeader(http.StatusBadRequest)
return
}
samlReponse := req.URL.Query().Get("SAMLResponse")
assertionInfo, err := sp.RetrieveAssertionInfo(samlReponse)
if err != nil {
fmt.Println(err)
rw.WriteHeader(http.StatusForbidden)
return
}
fmt.Println(assertionInfo)
if assertionInfo.WarningInfo.InvalidTime {
fmt.Println("here12:", assertionInfo.WarningInfo.InvalidTime)
rw.WriteHeader(http.StatusForbidden)
return
}
if assertionInfo.WarningInfo.NotInAudience {
fmt.Println(assertionInfo)
fmt.Println("here13:", assertionInfo.WarningInfo.NotInAudience)
rw.WriteHeader(http.StatusForbidden)
return
}
fmt.Fprintf(rw, "NameID: %s\n", assertionInfo.NameID)
fmt.Fprintf(rw, "Assertions:\n")
for key, val := range assertionInfo.Values {
fmt.Fprintf(rw, " %s: %+v\n", key, val)
}
fmt.Println(assertionInfo.Values.Get("FirstName"))
fmt.Fprintf(rw, "\n")
fmt.Fprintf(rw, "Warnings:\n")
fmt.Fprintf(rw, "%+v\n", assertionInfo.WarningInfo)
})
println("Visit this URL To Authenticate:")
authURL, err := sp.BuildAuthURL("")
if err != nil {
panic(err)
}
println(authURL)
println("Supply:")
fmt.Printf(" SP ACS URL : %s\n", sp.AssertionConsumerServiceURL)
err = http.ListenAndServe(":6900", nil)
if err != nil {
panic(err)
}
}
Запустіть вищевказаний код, і консоль відобразить наступне повідомлення.
Visit this URL To Authenticate:
http://localhost:7001/login/saml/authorize/admin/app-built-in?SAMLRequest=lFVbk6K8Fv0rFvNo2QR...
Supply:
SP ACS URL : http://localhost:6900/v1/_saml_callback
Натисніть URL для аутентифікації, і відобразиться сторінка входу Casdoor.

After authentication, the response looks like the examples below.
