mirror of
https://github.com/go-gitea/gitea
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7adc4717ec
From testing, I found that issue posters and users with repository write access are able to edit attachment names in a way that circumvents the instance-level file extension restrictions using the edit attachment APIs. This snapshot adds checks for these endpoints.
61 lines
1.8 KiB
Go
61 lines
1.8 KiB
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package attachment
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import (
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"bytes"
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"context"
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"fmt"
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"io"
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"code.gitea.io/gitea/models/db"
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repo_model "code.gitea.io/gitea/models/repo"
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"code.gitea.io/gitea/modules/storage"
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"code.gitea.io/gitea/modules/util"
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"code.gitea.io/gitea/services/context/upload"
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"github.com/google/uuid"
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)
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// NewAttachment creates a new attachment object, but do not verify.
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func NewAttachment(ctx context.Context, attach *repo_model.Attachment, file io.Reader, size int64) (*repo_model.Attachment, error) {
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if attach.RepoID == 0 {
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return nil, fmt.Errorf("attachment %s should belong to a repository", attach.Name)
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}
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err := db.WithTx(ctx, func(ctx context.Context) error {
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attach.UUID = uuid.New().String()
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size, err := storage.Attachments.Save(attach.RelativePath(), file, size)
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if err != nil {
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return fmt.Errorf("Create: %w", err)
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}
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attach.Size = size
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return db.Insert(ctx, attach)
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})
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return attach, err
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}
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// UploadAttachment upload new attachment into storage and update database
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func UploadAttachment(ctx context.Context, file io.Reader, allowedTypes string, fileSize int64, attach *repo_model.Attachment) (*repo_model.Attachment, error) {
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buf := make([]byte, 1024)
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n, _ := util.ReadAtMost(file, buf)
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buf = buf[:n]
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if err := upload.Verify(buf, attach.Name, allowedTypes); err != nil {
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return nil, err
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}
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return NewAttachment(ctx, attach, io.MultiReader(bytes.NewReader(buf), file), fileSize)
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}
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// UpdateAttachment updates an attachment, verifying that its name is among the allowed types.
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func UpdateAttachment(ctx context.Context, allowedTypes string, attach *repo_model.Attachment) error {
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if err := upload.Verify(nil, attach.Name, allowedTypes); err != nil {
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return err
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}
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return repo_model.UpdateAttachment(ctx, attach)
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}
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