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Add ReadPCRsRaw() to tpm2 #313

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Add ReadPCRsRaw() to tpm2 #313

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13 changes: 12 additions & 1 deletion tpm2/tpm2.go
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Original file line number Diff line number Diff line change
Expand Up @@ -183,6 +183,17 @@ func decodeReadPCRs(in []byte) (map[int][]byte, error) {
// This is only a wrapper over TPM2_PCR_Read() call, thus can only return
// at most 8 PCRs digests.
func ReadPCRs(rw io.ReadWriter, sel PCRSelection) (map[int][]byte, error) {
resp, err := ReadPCRsRaw(rw, sel)
if err != nil {
return nil, err
}

return decodeReadPCRs(resp)
}

// ReadPCRsRaw is very similar to ReadPCRs, except that it will return
// the raw response of TPM2_PCR_Read() in a byte array without decoding.
func ReadPCRsRaw(rw io.ReadWriter, sel PCRSelection) ([]byte, error) {
Cmd, err := encodeTPMLPCRSelection(sel)
if err != nil {
return nil, err
Expand All @@ -192,7 +203,7 @@ func ReadPCRs(rw io.ReadWriter, sel PCRSelection) (map[int][]byte, error) {
return nil, err
}

return decodeReadPCRs(resp)
return resp, nil
}

func decodeReadClock(in []byte) (uint64, uint64, error) {
Expand Down