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[backend/federation] Fix HttpSignature validation on systems using CRLF line endings

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This commit is contained in:
Laura Hausmann 2024-07-10 20:16:36 +02:00
parent 88bef87ef5
commit 0f97845b88
No known key found for this signature in database
GPG key ID: D044E84C5BE01605
2 changed files with 17 additions and 2 deletions
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15
Iceshrimp.Backend/Core/Extensions/StringExtensions.cs
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@ -1,5 +1,6 @@
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
using System.Text;
using EntityFrameworkCore.Projectables;
namespace Iceshrimp.Backend.Core.Extensions;
@ -50,3 +51,17 @@ public static class ProjectableStringExtensions
[Projectable]
public static bool IsGreaterOrEqualTo(this string a, string b) => a.CompareTo(b) >= 0;
}
public static class StringBuilderExtensions
{
private const char NewLineLf = '\n';
/// <summary>
/// Equivalent to .AppendLine, but always uses \n instead of Environment.NewLine
/// </summary>
public static StringBuilder AppendLineLf(this StringBuilder sb, string? value)
{
sb.Append(value);
return sb.Append(NewLineLf);
}
}

4
Iceshrimp.Backend/Core/Federation/Cryptography/HttpSignature.cs
View file

@ -2,6 +2,7 @@ using System.Net;
using System.Net.Http.Headers;
using System.Security.Cryptography;
using System.Text;
using Iceshrimp.Backend.Core.Extensions;
using Iceshrimp.Backend.Core.Middleware;
using Microsoft.Extensions.Primitives;
@ -108,7 +109,6 @@ public static class HttpSignature
keyId="{keyId}",headers="{string.Join(' ', requiredHeadersEnum)}",algorithm="hs2019",signature="{signatureBase64}"
""";
request.Headers.Add("Signature", signatureHeader);
return request;
}
@ -123,7 +123,7 @@ public static class HttpSignature
foreach (var header in headers)
{
sb.Append($"{header}: ");
sb.AppendLine(header switch
sb.AppendLineLf(header switch
{
"(request-target)" => $"{requestMethod.ToLowerInvariant()} {requestPath}",
"(created)" => signature?.Created ?? throw new Exception("Signature is missing created param"),