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download: Protect against dangling symlinks in $SSL_CERT_DIR. 

Reported by Christopher Baines <mail@cbaines.net>
in <https://bugs.gnu.org/25213>.

* guix/build/download.scm (make-credendials-with-ca-trust-files): Check
whether FILE exists before calling
'set-certificate-credentials-x509-trust-file!'.
master
Ludovic Courtès 2016-12-16 18:00:01 +01:00
parent 99ec0cb397
commit 580deec5b4
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1 changed files with 6 additions and 3 deletions
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9
guix/build/download.scm
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@ -289,9 +289,12 @@ DIRECTORY. Those authority certificates are checked when
(string-suffix? ".pem" file)))
'())))
(for-each (lambda (file)
(set-certificate-credentials-x509-trust-file!
cred (string-append directory "/" file)
x509-certificate-format/pem))
(let ((file (string-append directory "/" file)))
;; Protect against dangling symlinks.
(when (file-exists? file)
(set-certificate-credentials-x509-trust-file!
cred file
x509-certificate-format/pem))))
(or files '()))
cred))