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First, the fields `unknown1`, `unknown2`, aned `unknown3` are set to 0.
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First, the fields `unknown1`, `unknown2`, aned `unknown3` are set to 0.
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A 64 bit seed will be generated.
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A 64 bit seed will be generated.
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On Windows, the seed is the ECMA 182 CRC64 checksum of the PARM.
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On Windows, the seed is the ECMA 182 CRC64 checksum of the PARM.
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On Macintosh, it stays at the default value `0x38AD972A52830517` or
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On Macintosh, it stays at the default value `0x38AD972A52830517` (before 1.7.0.17) or
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`0x7416972a52830517`.
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`0x7416972a52830517` (beginning with 1.7.0.17).
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(because the manipulation of the binary code is not implemented).
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(because the manipulation of the binary code is not implemented).
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Then, the CRC32b checksum of the PARM will be written to `unknown1`.
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Then, the CRC32b checksum of the PARM will be written to `unknown1`.
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The PARM will then be XORed with a random data stream of the lower 32 bits of the 64 bit seed.
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The PARM will then be XORed with a random data stream of the lower 32 bits of the 64 bit seed.