publish: Do not sign the URL/Compression/FileSize narinfo fields.

This will allow mirror operators to alter these non-normative bits of a
narinfo without having to resign narinfos.

* guix/scripts/publish.scm (narinfo-string): Remove
URL/Compression/FileSize from BASE-INFO.  Move them after "Signature".
* tests/publish.scm ("/*.narinfo")
("/*.narinfo with properly encoded '+' sign")
("/*.narinfo with lzip + gzip")
("with cache, lzip + gzip"): Adjust accordingly.
* tests/substitute.scm ("query narinfo with signature over relevant subset"):
New test.
This commit is contained in:
Ludovic Courtès 2022-02-09 18:36:35 +01:00
parent ca87601dd9
commit 6adce1538d
No known key found for this signature in database
GPG Key ID: 090B11993D9AEBB5
3 changed files with 77 additions and 38 deletions

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@ -1,7 +1,7 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 David Thompson <davet@gnu.org>
;;; Copyright © 2020 by Amar M. Singh <nly@disroot.org>
;;; Copyright © 2015, 2016, 2017, 2018, 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2015-2022 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2020 Maxim Cournoyer <maxim.cournoyer@gmail.com>
;;; Copyright © 2021 Simon Tournier <zimon.toutoune@gmail.com>
;;; Copyright © 2021 Mathieu Othacehe <othacehe@gnu.org>
@ -345,20 +345,10 @@ much needs to be downloaded."
(base-info (format #f
"\
StorePath: ~a
~{~a~}\
NarHash: sha256:~a
NarSize: ~d
References: ~a~%"
store-path
(map (lambda (compression)
(let ((size (assoc-ref file-sizes
compression)))
(store-item->recutils store-path
#:file-size size
#:nar-path nar-path
#:compression
compression)))
compressions)
hash size references))
;; Do not render a "Deriver" line if we are rendering info for a
;; derivation. Also do not render a "System" line that would be
@ -369,7 +359,22 @@ References: ~a~%"
base-info (basename deriver))))
(signature (base64-encode-string
(canonical-sexp->string (signed-string info)))))
(format #f "~aSignature: 1;~a;~a~%" info (gethostname) signature)))
(format #f "~aSignature: 1;~a;~a~%~{~a~}"
info (gethostname) signature
;; Move information about the actual nars
;; (URL/Compression/FileSize) *after* the normative part that is
;; signed. That makes it possible to alter these bits of the
;; narinfo without having to resign them.
(map (lambda (compression)
(let ((size (assoc-ref file-sizes
compression)))
(store-item->recutils store-path
#:file-size size
#:nar-path nar-path
#:compression
compression)))
compressions))))
(define* (not-found request
#:key (phrase "Resource not found")

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@ -142,15 +142,10 @@
(unsigned-info
(format #f
"StorePath: ~a
URL: nar/~a
Compression: none
FileSize: ~a
NarHash: sha256:~a
NarSize: ~d
References: ~a~%"
%item
(basename %item)
(path-info-nar-size info)
(bytevector->nix-base32-string
(path-info-hash info))
(path-info-nar-size info)
@ -159,8 +154,13 @@ References: ~a~%"
(string->utf8
(canonical-sexp->string
(signed-string unsigned-info))))))
(format #f "~aSignature: 1;~a;~a~%"
unsigned-info (gethostname) signature))
(format #f "~aSignature: 1;~a;~a
URL: nar/~a
Compression: none
FileSize: ~a\n"
unsigned-info (gethostname) signature
(basename %item)
(path-info-nar-size info)))
(utf8->string
(http-get-body
(publish-uri
@ -173,15 +173,10 @@ References: ~a~%"
(unsigned-info
(format #f
"StorePath: ~a
URL: nar/~a
Compression: none
FileSize: ~a
NarHash: sha256:~a
NarSize: ~d
References: ~%"
item
(uri-encode (basename item))
(path-info-nar-size info)
(bytevector->nix-base32-string
(path-info-hash info))
(path-info-nar-size info)))
@ -189,8 +184,13 @@ References: ~%"
(string->utf8
(canonical-sexp->string
(signed-string unsigned-info))))))
(format #f "~aSignature: 1;~a;~a~%"
unsigned-info (gethostname) signature))
(format #f "~aSignature: 1;~a;~a
URL: nar/~a
Compression: none
FileSize: ~a~%"
unsigned-info (gethostname) signature
(uri-encode (basename item))
(path-info-nar-size info)))
(let ((item (add-text-to-store %store "fake-gtk+" "Congrats!")))
(utf8->string
@ -324,7 +324,12 @@ References: ~%"
(part (store-path-hash-part %item))
(url (string-append base part ".narinfo"))
(body (http-get-port url)))
(list (take (recutils->alist body) 5)
(list (filter (match-lambda
(("StorePath" . _) #t)
(("URL" . _) #t)
(("Compression" . _) #t)
(_ #f))
(recutils->alist body))
(response-code
(http-get (string-append base "nar/gzip/"
(basename %item))))
@ -504,16 +509,22 @@ References: ~%"
(basename %item))))
(and (file-exists? (nar "gzip"))
(file-exists? (nar "lzip"))
(equal? (take (pk 'narinfo/gzip+lzip narinfo) 7)
`(("StorePath" . ,%item)
("URL" . ,(nar-url "gzip"))
("Compression" . "gzip")
("FileSize" . ,(number->string
(stat:size (stat (nar "gzip")))))
("URL" . ,(nar-url "lzip"))
("Compression" . "lzip")
("FileSize" . ,(number->string
(stat:size (stat (nar "lzip")))))))
(match (pk 'narinfo/gzip+lzip narinfo)
((("StorePath" . path)
_ ...
("Signature" . _)
("URL" . gzip-url)
("Compression" . "gzip")
("FileSize" . (= string->number gzip-size))
("URL" . lzip-url)
("Compression" . "lzip")
("FileSize" . (= string->number lzip-size)))
(and (string=? gzip-url (nar-url "gzip"))
(string=? lzip-url (nar-url "lzip"))
(= gzip-size
(stat:size (stat (nar "gzip"))))
(= lzip-size
(stat:size (stat (nar "lzip")))))))
(list (response-code
(http-get (string-append base (nar-url "gzip"))))
(response-code

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@ -1,6 +1,6 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014 Nikita Karetnikov <nikita@karetnikov.org>
;;; Copyright © 2014, 2015, 2017, 2018, 2019, 2021 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2014-2015, 2017-2019, 2021-2022 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@ -268,6 +268,29 @@ System: mips64el-linux\n")
(lambda ()
(guix-substitute "--query")))))))))
(test-equal "query narinfo with signature over relevant subset"
;; The signature covers the StorePath/NarHash/References tuple, so it is
;; valid; it does not cover non-normative fields, which is fine.
(string-append (%store-prefix) "/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo")
(let ((prefix (string-append "StorePath: " (%store-prefix)
"/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo
NarHash: sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
References: bar baz\n")))
(with-narinfo (string-append prefix
"Signature: " (signature-field prefix) "
URL: example.nar
Compression: none
NarSize: 42
Deriver: " (%store-prefix) "/foo.drv")
(string-trim-both
(with-output-to-string
(lambda ()
(with-input-from-string (string-append "have " (%store-prefix)
"/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo")
(lambda ()
(guix-substitute "--query")))))))))
(test-equal "query narinfo signed with authorized key"
(string-append (%store-prefix) "/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo")