The doc actually says:

Traditionally the result is a string of 13 bytes: two first bytes of the salt, followed by 11 bytes from the set [./0-9A-Za-z], and only the first eight bytes of PLAINTEXT mattered

Edit: So it depends on the implementation of crypt available on your system, but you can expect bytes after the 8th to be ignored.

In reply to Re: crypt function has string length limit? by Eily
in thread crypt function has string length limit? by jamroll

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