a91768d341
The trigger field shows who initiated the operation, for example: for object deletion is it an external request or the internal scanner. Signed-off-by: Anis Elleuch <anis@min.io>
551 lines
18 KiB
Go
551 lines
18 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2018-2020 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"bytes"
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"context"
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"encoding/base64"
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"fmt"
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"net/http"
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"strings"
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"github.com/gorilla/mux"
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"github.com/minio/minio/cmd/config/identity/openid"
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xhttp "github.com/minio/minio/cmd/http"
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"github.com/minio/minio/cmd/logger"
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"github.com/minio/minio/pkg/auth"
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iampolicy "github.com/minio/minio/pkg/iam/policy"
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"github.com/minio/minio/pkg/wildcard"
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)
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const (
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// STS API version.
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stsAPIVersion = "2011-06-15"
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stsVersion = "Version"
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stsAction = "Action"
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stsPolicy = "Policy"
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stsToken = "Token"
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stsWebIdentityToken = "WebIdentityToken"
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stsDurationSeconds = "DurationSeconds"
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stsLDAPUsername = "LDAPUsername"
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stsLDAPPassword = "LDAPPassword"
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// STS API action constants
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clientGrants = "AssumeRoleWithClientGrants"
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webIdentity = "AssumeRoleWithWebIdentity"
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ldapIdentity = "AssumeRoleWithLDAPIdentity"
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assumeRole = "AssumeRole"
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stsRequestBodyLimit = 10 * (1 << 20) // 10 MiB
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// JWT claim keys
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expClaim = "exp"
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subClaim = "sub"
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// JWT claim to check the parent user
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parentClaim = "parent"
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// LDAP claim keys
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ldapUser = "ldapUser"
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)
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// stsAPIHandlers implements and provides http handlers for AWS STS API.
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type stsAPIHandlers struct{}
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// registerSTSRouter - registers AWS STS compatible APIs.
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func registerSTSRouter(router *mux.Router) {
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// Initialize STS.
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sts := &stsAPIHandlers{}
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// STS Router
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stsRouter := router.NewRoute().PathPrefix(SlashSeparator).Subrouter()
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// Assume roles with no JWT, handles AssumeRole.
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stsRouter.Methods(http.MethodPost).MatcherFunc(func(r *http.Request, rm *mux.RouteMatch) bool {
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ctypeOk := wildcard.MatchSimple("application/x-www-form-urlencoded*", r.Header.Get(xhttp.ContentType))
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authOk := wildcard.MatchSimple(signV4Algorithm+"*", r.Header.Get(xhttp.Authorization))
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noQueries := len(r.URL.Query()) == 0
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return ctypeOk && authOk && noQueries
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}).HandlerFunc(httpTraceAll(sts.AssumeRole))
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// Assume roles with JWT handler, handles both ClientGrants and WebIdentity.
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stsRouter.Methods(http.MethodPost).MatcherFunc(func(r *http.Request, rm *mux.RouteMatch) bool {
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ctypeOk := wildcard.MatchSimple("application/x-www-form-urlencoded*", r.Header.Get(xhttp.ContentType))
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noQueries := len(r.URL.Query()) == 0
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return ctypeOk && noQueries
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}).HandlerFunc(httpTraceAll(sts.AssumeRoleWithSSO))
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// AssumeRoleWithClientGrants
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stsRouter.Methods(http.MethodPost).HandlerFunc(httpTraceAll(sts.AssumeRoleWithClientGrants)).
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Queries(stsAction, clientGrants).
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Queries(stsVersion, stsAPIVersion).
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Queries(stsToken, "{Token:.*}")
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// AssumeRoleWithWebIdentity
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stsRouter.Methods(http.MethodPost).HandlerFunc(httpTraceAll(sts.AssumeRoleWithWebIdentity)).
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Queries(stsAction, webIdentity).
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Queries(stsVersion, stsAPIVersion).
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Queries(stsWebIdentityToken, "{Token:.*}")
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// AssumeRoleWithLDAPIdentity
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stsRouter.Methods(http.MethodPost).HandlerFunc(httpTraceAll(sts.AssumeRoleWithLDAPIdentity)).
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Queries(stsAction, ldapIdentity).
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Queries(stsVersion, stsAPIVersion).
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Queries(stsLDAPUsername, "{LDAPUsername:.*}").
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Queries(stsLDAPPassword, "{LDAPPassword:.*}")
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}
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func checkAssumeRoleAuth(ctx context.Context, r *http.Request) (user auth.Credentials, isErrCodeSTS bool, stsErr STSErrorCode) {
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switch getRequestAuthType(r) {
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default:
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return user, true, ErrSTSAccessDenied
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case authTypeSigned:
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s3Err := isReqAuthenticated(ctx, r, globalServerRegion, serviceSTS)
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if APIErrorCode(s3Err) != ErrNone {
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return user, false, STSErrorCode(s3Err)
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}
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var owner bool
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user, owner, s3Err = getReqAccessKeyV4(r, globalServerRegion, serviceSTS)
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if APIErrorCode(s3Err) != ErrNone {
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return user, false, STSErrorCode(s3Err)
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}
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// Root credentials are not allowed to use STS API
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if owner {
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return user, true, ErrSTSAccessDenied
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}
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}
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// Session tokens are not allowed in STS AssumeRole requests.
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if getSessionToken(r) != "" {
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return user, true, ErrSTSAccessDenied
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}
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// Temporary credentials or Service accounts cannot generate further temporary credentials.
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if user.IsTemp() || user.IsServiceAccount() {
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return user, true, ErrSTSAccessDenied
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}
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return user, true, ErrSTSNone
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}
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// AssumeRole - implementation of AWS STS API AssumeRole to get temporary
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// credentials for regular users on Minio.
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// https://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRole.html
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func (sts *stsAPIHandlers) AssumeRole(w http.ResponseWriter, r *http.Request) {
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ctx := newContext(r, w, "AssumeRole")
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user, isErrCodeSTS, stsErr := checkAssumeRoleAuth(ctx, r)
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if stsErr != ErrSTSNone {
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writeSTSErrorResponse(ctx, w, isErrCodeSTS, stsErr, nil)
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return
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}
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if err := r.ParseForm(); err != nil {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, err)
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return
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}
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if r.Form.Get(stsVersion) != stsAPIVersion {
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writeSTSErrorResponse(ctx, w, true, ErrSTSMissingParameter, fmt.Errorf("Invalid STS API version %s, expecting %s", r.Form.Get(stsVersion), stsAPIVersion))
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return
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}
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action := r.Form.Get(stsAction)
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switch action {
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case assumeRole:
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default:
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, fmt.Errorf("Unsupported action %s", action))
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return
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}
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ctx = newContext(r, w, action)
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defer logger.AuditLog(ctx, w, r, nil)
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sessionPolicyStr := r.Form.Get(stsPolicy)
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// https://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRole.html
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// The plain text that you use for both inline and managed session
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// policies shouldn't exceed 2048 characters.
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if len(sessionPolicyStr) > 2048 {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, fmt.Errorf("Session policy shouldn't exceed 2048 characters"))
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return
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}
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if len(sessionPolicyStr) > 0 {
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sessionPolicy, err := iampolicy.ParseConfig(bytes.NewReader([]byte(sessionPolicyStr)))
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if err != nil {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, err)
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return
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}
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// Version in policy must not be empty
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if sessionPolicy.Version == "" {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, fmt.Errorf("Version cannot be empty expecting '2012-10-17'"))
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return
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}
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}
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var err error
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m := make(map[string]interface{})
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m[expClaim], err = openid.GetDefaultExpiration(r.Form.Get(stsDurationSeconds))
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if err != nil {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, err)
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return
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}
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policies, err := globalIAMSys.PolicyDBGet(user.AccessKey, false)
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if err != nil {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, err)
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return
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}
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policyName := strings.Join(policies, ",")
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// This policy is the policy associated with the user
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// requesting for temporary credentials. The temporary
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// credentials will inherit the same policy requirements.
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m[iamPolicyClaimNameOpenID()] = policyName
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if len(sessionPolicyStr) > 0 {
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m[iampolicy.SessionPolicyName] = base64.StdEncoding.EncodeToString([]byte(sessionPolicyStr))
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}
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secret := globalActiveCred.SecretKey
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cred, err := auth.GetNewCredentialsWithMetadata(m, secret)
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if err != nil {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInternalError, err)
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return
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}
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// Set the parent of the temporary access key, this is useful
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// in obtaining service accounts by this cred.
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cred.ParentUser = user.AccessKey
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// Set the newly generated credentials.
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if err = globalIAMSys.SetTempUser(cred.AccessKey, cred, policyName); err != nil {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInternalError, err)
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return
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}
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// Notify all other MinIO peers to reload temp users
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for _, nerr := range globalNotificationSys.LoadUser(cred.AccessKey, true) {
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if nerr.Err != nil {
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logger.GetReqInfo(ctx).SetTags("peerAddress", nerr.Host.String())
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logger.LogIf(ctx, nerr.Err)
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}
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}
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assumeRoleResponse := &AssumeRoleResponse{
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Result: AssumeRoleResult{
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Credentials: cred,
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},
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}
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assumeRoleResponse.ResponseMetadata.RequestID = w.Header().Get(xhttp.AmzRequestID)
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writeSuccessResponseXML(w, encodeResponse(assumeRoleResponse))
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}
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func (sts *stsAPIHandlers) AssumeRoleWithSSO(w http.ResponseWriter, r *http.Request) {
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ctx := newContext(r, w, "AssumeRoleSSOCommon")
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// Parse the incoming form data.
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if err := r.ParseForm(); err != nil {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, err)
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return
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}
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if r.Form.Get(stsVersion) != stsAPIVersion {
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writeSTSErrorResponse(ctx, w, true, ErrSTSMissingParameter, fmt.Errorf("Invalid STS API version %s, expecting %s", r.Form.Get("Version"), stsAPIVersion))
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return
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}
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action := r.Form.Get(stsAction)
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switch action {
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case ldapIdentity:
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sts.AssumeRoleWithLDAPIdentity(w, r)
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return
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case clientGrants, webIdentity:
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default:
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, fmt.Errorf("Unsupported action %s", action))
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return
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}
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ctx = newContext(r, w, action)
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defer logger.AuditLog(ctx, w, r, nil)
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if globalOpenIDValidators == nil {
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writeSTSErrorResponse(ctx, w, true, ErrSTSNotInitialized, errServerNotInitialized)
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return
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}
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v, err := globalOpenIDValidators.Get("jwt")
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if err != nil {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, err)
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return
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}
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token := r.Form.Get(stsToken)
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if token == "" {
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token = r.Form.Get(stsWebIdentityToken)
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}
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m, err := v.Validate(token, r.Form.Get(stsDurationSeconds))
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if err != nil {
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switch err {
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case openid.ErrTokenExpired:
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switch action {
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case clientGrants:
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writeSTSErrorResponse(ctx, w, true, ErrSTSClientGrantsExpiredToken, err)
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case webIdentity:
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writeSTSErrorResponse(ctx, w, true, ErrSTSWebIdentityExpiredToken, err)
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}
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return
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case auth.ErrInvalidDuration:
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, err)
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return
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}
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, err)
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return
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}
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// JWT has requested a custom claim with policy value set.
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// This is a MinIO STS API specific value, this value should
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// be set and configured on your identity provider as part of
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// JWT custom claims.
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var policyName string
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policySet, ok := iampolicy.GetPoliciesFromClaims(m, iamPolicyClaimNameOpenID())
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if ok {
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policyName = globalIAMSys.CurrentPolicies(strings.Join(policySet.ToSlice(), ","))
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}
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if policyName == "" && globalPolicyOPA == nil {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue,
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fmt.Errorf("%s claim missing from the JWT token, credentials will not be generated", iamPolicyClaimNameOpenID()))
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return
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}
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m[iamPolicyClaimNameOpenID()] = policyName
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sessionPolicyStr := r.Form.Get(stsPolicy)
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// https://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRoleWithWebIdentity.html
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// The plain text that you use for both inline and managed session
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// policies shouldn't exceed 2048 characters.
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if len(sessionPolicyStr) > 2048 {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, fmt.Errorf("Session policy should not exceed 2048 characters"))
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return
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}
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if len(sessionPolicyStr) > 0 {
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sessionPolicy, err := iampolicy.ParseConfig(bytes.NewReader([]byte(sessionPolicyStr)))
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if err != nil {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, err)
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return
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}
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// Version in policy must not be empty
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if sessionPolicy.Version == "" {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, fmt.Errorf("Invalid session policy version"))
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return
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}
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m[iampolicy.SessionPolicyName] = base64.StdEncoding.EncodeToString([]byte(sessionPolicyStr))
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}
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secret := globalActiveCred.SecretKey
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cred, err := auth.GetNewCredentialsWithMetadata(m, secret)
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if err != nil {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInternalError, err)
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return
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}
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var subFromToken string
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if v, ok := m[subClaim]; ok {
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subFromToken, _ = v.(string)
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}
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// Set the newly generated credentials.
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if err = globalIAMSys.SetTempUser(cred.AccessKey, cred, policyName); err != nil {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInternalError, err)
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return
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}
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// Notify all other MinIO peers to reload temp users
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for _, nerr := range globalNotificationSys.LoadUser(cred.AccessKey, true) {
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if nerr.Err != nil {
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logger.GetReqInfo(ctx).SetTags("peerAddress", nerr.Host.String())
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logger.LogIf(ctx, nerr.Err)
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}
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}
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var encodedSuccessResponse []byte
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switch action {
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case clientGrants:
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clientGrantsResponse := &AssumeRoleWithClientGrantsResponse{
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Result: ClientGrantsResult{
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Credentials: cred,
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SubjectFromToken: subFromToken,
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},
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}
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clientGrantsResponse.ResponseMetadata.RequestID = w.Header().Get(xhttp.AmzRequestID)
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encodedSuccessResponse = encodeResponse(clientGrantsResponse)
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case webIdentity:
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webIdentityResponse := &AssumeRoleWithWebIdentityResponse{
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Result: WebIdentityResult{
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Credentials: cred,
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SubjectFromWebIdentityToken: subFromToken,
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},
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}
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webIdentityResponse.ResponseMetadata.RequestID = w.Header().Get(xhttp.AmzRequestID)
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encodedSuccessResponse = encodeResponse(webIdentityResponse)
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}
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writeSuccessResponseXML(w, encodedSuccessResponse)
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}
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// AssumeRoleWithWebIdentity - implementation of AWS STS API supporting OAuth2.0
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// users from web identity provider such as Facebook, Google, or any OpenID
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// Connect-compatible identity provider.
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//
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// Eg:-
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// $ curl https://minio:9000/?Action=AssumeRoleWithWebIdentity&WebIdentityToken=<jwt>
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func (sts *stsAPIHandlers) AssumeRoleWithWebIdentity(w http.ResponseWriter, r *http.Request) {
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sts.AssumeRoleWithSSO(w, r)
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}
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// AssumeRoleWithClientGrants - implementation of AWS STS extension API supporting
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// OAuth2.0 client credential grants.
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//
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// Eg:-
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// $ curl https://minio:9000/?Action=AssumeRoleWithClientGrants&Token=<jwt>
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func (sts *stsAPIHandlers) AssumeRoleWithClientGrants(w http.ResponseWriter, r *http.Request) {
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sts.AssumeRoleWithSSO(w, r)
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}
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// AssumeRoleWithLDAPIdentity - implements user auth against LDAP server
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func (sts *stsAPIHandlers) AssumeRoleWithLDAPIdentity(w http.ResponseWriter, r *http.Request) {
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ctx := newContext(r, w, "AssumeRoleWithLDAPIdentity")
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defer logger.AuditLog(ctx, w, r, nil, stsLDAPPassword)
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// Parse the incoming form data.
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if err := r.ParseForm(); err != nil {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, err)
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return
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}
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if r.Form.Get(stsVersion) != stsAPIVersion {
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writeSTSErrorResponse(ctx, w, true, ErrSTSMissingParameter,
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fmt.Errorf("Invalid STS API version %s, expecting %s", r.Form.Get("Version"), stsAPIVersion))
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return
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}
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ldapUsername := r.Form.Get(stsLDAPUsername)
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ldapPassword := r.Form.Get(stsLDAPPassword)
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if ldapUsername == "" || ldapPassword == "" {
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writeSTSErrorResponse(ctx, w, true, ErrSTSMissingParameter, fmt.Errorf("LDAPUsername and LDAPPassword cannot be empty"))
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return
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}
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action := r.Form.Get(stsAction)
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switch action {
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case ldapIdentity:
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default:
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, fmt.Errorf("Unsupported action %s", action))
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return
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}
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sessionPolicyStr := r.Form.Get(stsPolicy)
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// https://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRole.html
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// The plain text that you use for both inline and managed session
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// policies shouldn't exceed 2048 characters.
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if len(sessionPolicyStr) > 2048 {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, fmt.Errorf("Session policy should not exceed 2048 characters"))
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return
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}
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if len(sessionPolicyStr) > 0 {
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sessionPolicy, err := iampolicy.ParseConfig(bytes.NewReader([]byte(sessionPolicyStr)))
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if err != nil {
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writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, err)
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return
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}
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// Version in policy must not be empty
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|
if sessionPolicy.Version == "" {
|
|
writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, fmt.Errorf("Version needs to be specified in session policy"))
|
|
return
|
|
}
|
|
}
|
|
|
|
groups, err := globalLDAPConfig.Bind(ldapUsername, ldapPassword)
|
|
if err != nil {
|
|
err = fmt.Errorf("LDAP server connection failure: %w", err)
|
|
writeSTSErrorResponse(ctx, w, true, ErrSTSInvalidParameterValue, err)
|
|
return
|
|
}
|
|
|
|
expiryDur := globalLDAPConfig.GetExpiryDuration()
|
|
m := map[string]interface{}{
|
|
expClaim: UTCNow().Add(expiryDur).Unix(),
|
|
ldapUser: ldapUsername,
|
|
}
|
|
|
|
if len(sessionPolicyStr) > 0 {
|
|
m[iampolicy.SessionPolicyName] = base64.StdEncoding.EncodeToString([]byte(sessionPolicyStr))
|
|
}
|
|
|
|
secret := globalActiveCred.SecretKey
|
|
cred, err := auth.GetNewCredentialsWithMetadata(m, secret)
|
|
if err != nil {
|
|
writeSTSErrorResponse(ctx, w, true, ErrSTSInternalError, err)
|
|
return
|
|
}
|
|
|
|
// Set the parent of the temporary access key, this is useful
|
|
// in obtaining service accounts by this cred.
|
|
cred.ParentUser = ldapUsername
|
|
|
|
// Set this value to LDAP groups, LDAP user can be part
|
|
// of large number of groups
|
|
cred.Groups = groups
|
|
|
|
// Set the newly generated credentials, policyName is empty on purpose
|
|
// LDAP policies are applied automatically using their ldapUser, ldapGroups
|
|
// mapping.
|
|
if err = globalIAMSys.SetTempUser(cred.AccessKey, cred, ""); err != nil {
|
|
writeSTSErrorResponse(ctx, w, true, ErrSTSInternalError, err)
|
|
return
|
|
}
|
|
|
|
// Notify all other MinIO peers to reload temp users
|
|
for _, nerr := range globalNotificationSys.LoadUser(cred.AccessKey, true) {
|
|
if nerr.Err != nil {
|
|
logger.GetReqInfo(ctx).SetTags("peerAddress", nerr.Host.String())
|
|
logger.LogIf(ctx, nerr.Err)
|
|
}
|
|
}
|
|
|
|
ldapIdentityResponse := &AssumeRoleWithLDAPResponse{
|
|
Result: LDAPIdentityResult{
|
|
Credentials: cred,
|
|
},
|
|
}
|
|
ldapIdentityResponse.ResponseMetadata.RequestID = w.Header().Get(xhttp.AmzRequestID)
|
|
encodedSuccessResponse := encodeResponse(ldapIdentityResponse)
|
|
|
|
writeSuccessResponseXML(w, encodedSuccessResponse)
|
|
}
|