tlsClaimMapper.go

// The MIT License
//
// Copyright (c) 2020 Temporal Technologies Inc.  All rights reserved.
//
// Copyright (c) 2020 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package sample_tls_claim_mapper

import "strings"

const (
	adminCN      = "internode.cluster-x.contoso.com"
	clientDomain = "client.contoso.com"
)

type tlsClaimMapper struct{}

func NewTLSClaimMapper() ClaimMapper {
	return &tlsClaimMapper{}
}

func (a *tlsClaimMapper) GetClaims(authInfo *AuthInfo) (*Claims, error) {
	claims := Claims{}
	if authInfo.TLSSubject != nil {
		cn := authInfo.TLSSubject.CommonName
		if cn == adminCN {
			claims.System = RoleAdmin
		} else if ns, domain, ok := strings.Cut(cn, "."); ok && domain == clientDomain {
			claims.Namespaces = map[string]Role{ns: RoleWriter}
		}
	}
	return &claims, nil
}