11 lines
470 B
Scheme
11 lines
470 B
Scheme
(import-os-error-syscall %crypt (key salt) "scm_crypt")
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(define (crypt key salt)
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(let* ((allowed-char-set (rx (| alpha digit "." "/")))
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(salt-regexp (rx (: ,allowed-char-set ,allowed-char-set))))
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(if (not (= (string-length salt) 2)) (error "salt must have length 2"))
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(if (not (regexp-search? salt-regexp salt))
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(error "illegal char in salt " salt))
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(if (> (string-length key) 8) (error "key too long " (string-length key)))
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(%crypt key salt)))
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