/
cbs.go
83 lines (73 loc) · 2.86 KB
/
cbs.go
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// Package cbs provides the functionality for negotiating claims-based security over AMQP for use in Azure Service Bus
// and Event Hubs.
package cbs
// MIT License
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// 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
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE
import (
"context"
"fmt"
"time"
"github.com/Azure/azure-amqp-common-go/auth"
"github.com/Azure/azure-amqp-common-go/internal/tracing"
"github.com/Azure/azure-amqp-common-go/log"
"github.com/Azure/azure-amqp-common-go/rpc"
"pack.ag/amqp"
)
const (
cbsAddress = "$cbs"
cbsOperationKey = "operation"
cbsOperationPutToken = "put-token"
cbsTokenTypeKey = "type"
cbsAudienceKey = "name"
cbsExpirationKey = "expiration"
)
// NegotiateClaim attempts to put a token to the $cbs management endpoint to negotiate auth for the given audience
func NegotiateClaim(ctx context.Context, audience string, conn *amqp.Client, provider auth.TokenProvider) error {
span, ctx := tracing.StartSpanFromContext(ctx, "az-amqp-common.cbs.NegotiateClaim")
defer span.End()
link, err := rpc.NewLink(conn, cbsAddress)
if err != nil {
return err
}
defer link.Close(ctx)
token, err := provider.GetToken(audience)
if err != nil {
return err
}
log.For(ctx).Debug(fmt.Sprintf("negotiating claim for audience %s with token type %s and expiry of %s", audience, token.TokenType, token.Expiry))
msg := &amqp.Message{
Value: token.Token,
ApplicationProperties: map[string]interface{}{
cbsOperationKey: cbsOperationPutToken,
cbsTokenTypeKey: string(token.TokenType),
cbsAudienceKey: audience,
cbsExpirationKey: token.Expiry,
},
}
res, err := link.RetryableRPC(ctx, 3, 1*time.Second, msg)
if err != nil {
log.For(ctx).Error(err)
return err
}
log.For(ctx).Debug(fmt.Sprintf("negotiated with response code %d and message: %s", res.Code, res.Description))
return nil
}