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33 lines
851 B
Go
33 lines
851 B
Go
// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
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// See LICENSE.txt for license information.
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package app
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import (
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"fmt"
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"io"
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"github.com/mattermost/mattermost-server/v6/app/imaging"
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)
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func checkImageResolutionLimit(w, h int, maxRes int64) error {
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// This casting is done to prevent overflow on 32 bit systems (not needed
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// in 64 bits systems because images can't have more than 32 bits height or
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// width)
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imageRes := int64(w) * int64(h)
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if imageRes > maxRes {
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return fmt.Errorf("image resolution is too high: %d, max allowed is %d", imageRes, maxRes)
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}
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return nil
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}
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func checkImageLimits(imageData io.Reader, maxRes int64) error {
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w, h, err := imaging.GetDimensions(imageData)
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if err != nil {
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return fmt.Errorf("failed to get image dimensions: %w", err)
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}
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return checkImageResolutionLimit(w, h, maxRes)
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}
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