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package s3api
import (
"context"
"fmt"
"net/http"
"net/url"
"testing"
"time"
"github.com/seaweedfs/seaweedfs/weed/iam/integration"
"github.com/seaweedfs/seaweedfs/weed/iam/policy"
"github.com/seaweedfs/seaweedfs/weed/iam/sts"
"github.com/seaweedfs/seaweedfs/weed/s3api/s3_constants"
"github.com/seaweedfs/seaweedfs/weed/s3api/s3err"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
// TestAssumeRole_CallerIdentityFallback tests the fallback logic when RoleArn is missing
func TestAssumeRole_CallerIdentityFallback(t *testing.T) {
// Setup STS service
stsService, _ := setupTestSTSService(t)
// Create IAM integration mock
iamMock := &MockIAMIntegration{
authorizeFunc: func(ctx context.Context, identity *IAMIdentity, action Action, bucket, object string, r *http.Request) s3err.ErrorCode {
// Allow global sts:AssumeRole
if action == "sts:AssumeRole" {
return s3err.ErrNone
}
return s3err.ErrAccessDenied
},
validateTrustPolicyFunc: func(ctx context.Context, roleArn, principalArn string) error {
// Allow all trust policies for this test
return nil
},
}
// Create IAM service with the mock integration
iam := &IdentityAccessManagement{
iamIntegration: iamMock,
}
// Create STS handlers
stsHandlers := NewSTSHandlers(stsService, iam)
// Test case 1: Caller is an IAM User, RoleArn is missing
t.Run("Caller is IAM User, No RoleArn", func(t *testing.T) {
// Mock request
req, err := http.NewRequest("POST", "/", nil)
require.NoError(t, err)
req.Form = url.Values{}
req.Form.Set("Action", "AssumeRole")
req.Form.Set("RoleSessionName", "test-session")
req.Form.Set("Version", "2011-06-15")
// Mock the authenticated identity (IAM User)
callerIdentity := &Identity{
Name: "alice",
Account: &AccountAdmin,
PrincipalArn: fmt.Sprintf("arn:aws:iam::%s:user/alice", defaultAccountID),
Actions: []Action{s3_constants.ACTION_ADMIN},
}
// 1. Test prepareSTSCredentials with NO RoleArn (simulating the fallback logic having passed PrincipalArn)
// expected RoleArn passed to prepareSTSCredentials would be the caller's PrincipalArn
fallbackRoleArn := callerIdentity.PrincipalArn
// Prepare custom claims for the session (mimicking handleAssumeRole logic)
var modifyClaims func(claims *sts.STSSessionClaims)
if callerIdentity.isAdmin() {
modifyClaims = func(claims *sts.STSSessionClaims) {
if claims.RequestContext == nil {
claims.RequestContext = make(map[string]interface{})
}
claims.RequestContext["is_admin"] = true
}
}
stsCreds, assumedUser, err := stsHandlers.prepareSTSCredentials(context.Background(), fallbackRoleArn, "test-session", nil, "", modifyClaims)
require.NoError(t, err)
// Assertions
// The role name should be extracted from the user ARN ("alice")
assert.Contains(t, assumedUser.Arn, fmt.Sprintf("assumed-role/alice/test-session"))
assert.Contains(t, assumedUser.AssumedRoleId, "alice:test-session")
// Verify token claims using ValidateSessionToken
sessionInfo, err := stsService.ValidateSessionToken(context.Background(), stsCreds.SessionToken)
require.NoError(t, err)
// The RoleArn in session info should match the fallback ARN (user ARN)
assert.Equal(t, fallbackRoleArn, sessionInfo.RoleArn)
// Verify is_admin claim is present
isAdmin, ok := sessionInfo.RequestContext["is_admin"].(bool)
assert.True(t, ok, "is_admin claim should be present")
assert.True(t, isAdmin, "is_admin claim should be true")
})
// Test case 2: Caller is an STS Assumed Role, No RoleArn
t.Run("Caller is STS Assumed Role, No RoleArn", func(t *testing.T) {
// Mock identity
callerIdentity := &Identity{
Name: "arn:aws:sts::111122223333:assumed-role/admin/session1",
Account: &AccountAdmin,
PrincipalArn: "arn:aws:sts::111122223333:assumed-role/admin/session1",
}
fallbackRoleArn := callerIdentity.PrincipalArn
stsCreds, assumedUser, err := stsHandlers.prepareSTSCredentials(context.Background(), fallbackRoleArn, "nested-session", nil, "", nil)
require.NoError(t, err)
// The role name should be extracted from the assumed role ARN ("admin")
assert.Contains(t, assumedUser.Arn, "assumed-role/admin/nested-session")
assert.Contains(t, assumedUser.AssumedRoleId, "admin:nested-session")
// Check claims
sessionInfo, err := stsService.ValidateSessionToken(context.Background(), stsCreds.SessionToken)
require.NoError(t, err)
assert.Equal(t, fallbackRoleArn, sessionInfo.RoleArn)
})
// Test case 3: Explicit RoleArn provided (Standard AssumeRole)
t.Run("Explicit RoleArn Provided", func(t *testing.T) {
explicitRoleArn := "arn:aws:iam::111122223333:role/TargetRole"
stsCreds, assumedUser, err := stsHandlers.prepareSTSCredentials(context.Background(), explicitRoleArn, "explicit-session", nil, "", nil)
require.NoError(t, err)
// Role name should be "TargetRole"
assert.Contains(t, assumedUser.Arn, "assumed-role/TargetRole/explicit-session")
// Check claims
sessionInfo, err := stsService.ValidateSessionToken(context.Background(), stsCreds.SessionToken)
require.NoError(t, err)
assert.Equal(t, explicitRoleArn, sessionInfo.RoleArn)
})
// Test case 4: Malformed ARN (Edge case)
t.Run("Malformed ARN", func(t *testing.T) {
malformedArn := "invalid-arn"
stsCreds, assumedUser, err := stsHandlers.prepareSTSCredentials(context.Background(), malformedArn, "bad-session", nil, "", nil)
require.NoError(t, err)
// Fallback behavior: use full string as role name if extraction fails
assert.Contains(t, assumedUser.Arn, "assumed-role/invalid-arn/bad-session")
sessionInfo, err := stsService.ValidateSessionToken(context.Background(), stsCreds.SessionToken)
require.NoError(t, err)
assert.Equal(t, malformedArn, sessionInfo.RoleArn)
})
}
func TestAssumeRole_EmbedsRolePolicies(t *testing.T) {
t.Run("RoleWithAttachedPolicies", func(t *testing.T) {
ctx := context.Background()
manager := newTestSTSIntegrationManager(t)
writePolicy := &policy.PolicyDocument{
Version: "2012-10-17",
Statement: []policy.Statement{
{
Effect: "Allow",
Action: []string{"s3:*"},
Resource: []string{
"arn:aws:s3:::*",
"arn:aws:s3:::*/*",
},
},
},
}
require.NoError(t, manager.CreatePolicy(ctx, "", "S3WritePolicy", writePolicy))
roleName := "LakekeeperVendedRole"
require.NoError(t, manager.CreateRole(ctx, "", roleName, &integration.RoleDefinition{
RoleName: roleName,
AttachedPolicies: []string{"S3WritePolicy"},
}))
iam := &IdentityAccessManagement{
iamIntegration: NewS3IAMIntegration(manager, ""),
}
stsHandlers := NewSTSHandlers(manager.GetSTSService(), iam)
roleArn := fmt.Sprintf("arn:aws:iam::%s:role/%s", defaultAccountID, roleName)
stsCreds, _, err := stsHandlers.prepareSTSCredentials(ctx, roleArn, "test-session", nil, "", nil)
require.NoError(t, err)
sessionInfo, err := manager.GetSTSService().ValidateSessionToken(ctx, stsCreds.SessionToken)
require.NoError(t, err)
require.NotNil(t, sessionInfo)
assert.Equal(t, []string{"S3WritePolicy"}, sessionInfo.Policies)
})
t.Run("RoleWithoutAttachedPolicies", func(t *testing.T) {
ctx := context.Background()
manager := newTestSTSIntegrationManager(t)
roleName := "LakekeeperEmptyRole"
require.NoError(t, manager.CreateRole(ctx, "", roleName, &integration.RoleDefinition{
RoleName: roleName,
}))
iam := &IdentityAccessManagement{
iamIntegration: NewS3IAMIntegration(manager, ""),
}
stsHandlers := NewSTSHandlers(manager.GetSTSService(), iam)
roleArn := fmt.Sprintf("arn:aws:iam::%s:role/%s", defaultAccountID, roleName)
stsCreds, _, err := stsHandlers.prepareSTSCredentials(ctx, roleArn, "test-session", nil, "", nil)
require.NoError(t, err)
sessionInfo, err := manager.GetSTSService().ValidateSessionToken(ctx, stsCreds.SessionToken)
require.NoError(t, err)
assert.Empty(t, sessionInfo.Policies)
})
}
func newTestSTSIntegrationManager(t *testing.T) *integration.IAMManager {
t.Helper()
manager := integration.NewIAMManager()
config := &integration.IAMConfig{
STS: &sts.STSConfig{
TokenDuration: sts.FlexibleDuration{Duration: time.Hour},
MaxSessionLength: sts.FlexibleDuration{Duration: 12 * time.Hour},
Issuer: "test-issuer",
SigningKey: []byte("test-signing-key-at-least-32-bytes-long-for-security"),
},
Policy: &policy.PolicyEngineConfig{
DefaultEffect: "Deny",
StoreType: "memory",
},
Roles: &integration.RoleStoreConfig{
StoreType: "memory",
},
}
require.NoError(t, manager.Initialize(config, func() string { return "" }))
return manager
}