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Fix: Header crc calculation

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Signed-off-by: Thomas Klaehn <tkl@blackfinn.de>
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Thomas Klaehn
2026-02-13 10:15:45 +01:00
parent 2945d90d24
commit 8fbcb8562f
1 changed files with 6 additions and 4 deletions
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10
fitparser/header.go
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@@ -54,10 +54,12 @@ func ParseHeader(data []byte) (*Header, error) {
if h.Size == HeaderWithCRCSize { if h.Size == HeaderWithCRCSize {
h.CRC = binary.LittleEndian.Uint16(data[12:14]) h.CRC = binary.LittleEndian.Uint16(data[12:14])
// Validate header CRC // Validate header CRC (skip if CRC is 0x0000, which means "no validation")
calculatedCRC := CalculateCRC(data[0:12]) if h.CRC != 0x0000 {
if calculatedCRC != h.CRC { calculatedCRC := CalculateCRC(data[0:12])
return nil, fmt.Errorf("header CRC mismatch: got 0x%04X, expected 0x%04X", h.CRC, calculatedCRC) if calculatedCRC != h.CRC {
return nil, fmt.Errorf("header CRC mismatch: got 0x%04X, expected 0x%04X", h.CRC, calculatedCRC)
}
} }
} }