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EG API updates #18274
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EG API updates #18274
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212 changes: 109 additions & 103 deletions
212
sdk/eventgrid/Azure.Messaging.EventGrid/api/Azure.Messaging.EventGrid.netstandard2.0.cs
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91 changes: 91 additions & 0 deletions
91
sdk/eventgrid/Azure.Messaging.EventGrid/src/Customization/EventGridSasBuilder.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| // Copyright (c) Microsoft Corporation. All rights reserved. | ||
| // Licensed under the MIT License. | ||
|
|
||
| using System; | ||
| using System.Globalization; | ||
| using System.Security.Cryptography; | ||
| using System.Text; | ||
| using System.Web; | ||
| using Azure.Core; | ||
|
|
||
| namespace Azure.Messaging.EventGrid | ||
| { | ||
| /// <summary> | ||
| /// This <see cref="EventGridSasBuilder"/> is used to generate a Shared Access Signature (SAS) for an Azure Event Grid topic. | ||
| /// </summary> | ||
| public class EventGridSasBuilder | ||
| { | ||
| /// <summary> | ||
| /// Initializes a new instance of the <see cref="EventGridSasBuilder"/> class. | ||
| /// </summary> | ||
| /// <param name="endpoint">The endpoint to generate a shared access signature for. | ||
| /// For example, "https://TOPIC-NAME.REGION-NAME.eventgrid.azure.net/eventGrid/api/events".</param> | ||
| /// <param name="expiresOn">The time at which the shared access signature should expire.</param> | ||
| public EventGridSasBuilder(Uri endpoint, DateTimeOffset expiresOn) | ||
| { | ||
| Argument.AssertNotNull(endpoint, nameof(endpoint)); | ||
| Endpoint = endpoint; | ||
| ExpiresOn = expiresOn; | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Gets or sets the endpoint to generate a shared access signature for. | ||
| /// </summary> | ||
| public Uri Endpoint | ||
| { | ||
| get | ||
| { | ||
| return _endpoint; | ||
| } | ||
| set | ||
| { | ||
| Argument.AssertNotNull(value, nameof(value)); | ||
| _endpoint = value; | ||
| } | ||
| } | ||
|
|
||
| private Uri _endpoint; | ||
|
|
||
| /// <summary> | ||
| /// Gets or sets the time at which the shared access signature should expire. | ||
| /// </summary> | ||
| public DateTimeOffset ExpiresOn { get; set; } | ||
|
|
||
| /// <summary> | ||
| /// Gets or sets the service version to use when generating the shared access signature. | ||
| /// </summary> | ||
| public EventGridPublisherClientOptions.ServiceVersion ApiVersion { get; set; } = EventGridPublisherClientOptions.LatestVersion; | ||
|
|
||
| /// <summary> | ||
| /// Generates a shared access signature that can be used to authenticate with a topic. | ||
| /// The signature can be used as the input to the <see cref="AzureSasCredential(string)"/> constructor. | ||
| /// This credential can then be passed to the <see cref="EventGridPublisherClient(Uri, AzureSasCredential, EventGridPublisherClientOptions)"/> constructor. | ||
| /// </summary> | ||
| /// <param name="key">The <see cref="AzureKeyCredential"/> to use to authenticate with the service | ||
| /// when generating the shared access signature.</param> | ||
| /// <returns>A shared access signature that can be used to authenticate with an Event Grid topic.</returns> | ||
| public string GenerateSas(AzureKeyCredential key) | ||
| { | ||
| Argument.AssertNotNull(key, nameof(key)); | ||
| const char Resource = 'r'; | ||
| const char Expiration = 'e'; | ||
| const char Signature = 's'; | ||
|
|
||
| var uriBuilder = new RequestUriBuilder(); | ||
| uriBuilder.Reset(Endpoint); | ||
| uriBuilder.AppendQuery("api-version", ApiVersion.GetVersionString(), true); | ||
| string encodedResource = HttpUtility.UrlEncode(uriBuilder.ToString()); | ||
| var encodedExpirationUtc = HttpUtility.UrlEncode(ExpiresOn.ToString(CultureInfo.InvariantCulture)); | ||
|
|
||
| string unsignedSas = $"{Resource}={encodedResource}&{Expiration}={encodedExpirationUtc}"; | ||
| using (var hmac = new HMACSHA256(Convert.FromBase64String(key.Key))) | ||
| { | ||
| string signature = Convert.ToBase64String(hmac.ComputeHash(Encoding.UTF8.GetBytes(unsignedSas))); | ||
| string encodedSignature = HttpUtility.UrlEncode(signature); | ||
| string signedSas = $"{unsignedSas}&{Signature}={encodedSignature}"; | ||
|
|
||
| return signedSas; | ||
| } | ||
| } | ||
| } | ||
| } | ||
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This was previously using "en-us" for the culture as that is what was referenced in https://docs.microsoft.com/en-us/azure/event-grid/security-authenticate-publishing-clients#generate-sas-token-programmatically
But InvariantCulture seems to work fine.
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Slight preference for keeping en-US since that's what was documented by the service, but I agree in practice there is unlikely to be a difference between the two cultures in practice.
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Fair enough, will revert.