mirror of
https://github.com/edgelesssys/constellation.git
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32 lines
594 B
Go
32 lines
594 B
Go
/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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package measure
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import (
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"bytes"
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"fmt"
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"hash"
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"io"
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"github.com/foxboron/go-uefi/efi/pecoff"
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)
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// Authentihash returns the PE/COFF hash / Authentihash of a file.
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func Authentihash(r io.Reader, h hash.Hash) ([]byte, error) {
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buf := new(bytes.Buffer)
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if _, err := buf.ReadFrom(r); err != nil {
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return nil, fmt.Errorf("failed to read pe file: %v", err)
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}
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signingCtx := pecoff.PECOFFChecksum(buf.Bytes())
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pecoff.PaddSigCtx(signingCtx)
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h.Write(signingCtx.SigData.Bytes())
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return h.Sum(nil), nil
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}
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