guix/tests/substitute-binary.scm
Ludovic Courtès e903b7c1a8 tests: Add more signed substitute tests.
* tests/substitute-binary.scm (%narinfo): Set 'URL', 'Compression', and
  'NarHash'.
  (call-with-narinfo): Create 'example.out' and 'example.nar'.
  ("query narinfo without signature", "substitute, no signature",
  "substitute, authorized key"): New tests.
2014-03-30 22:32:16 +02:00

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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014 Nikita Karetnikov <nikita@karetnikov.org>
;;; Copyright © 2014 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (test-substitute-binary)
#:use-module (guix scripts substitute-binary)
#:use-module (guix base64)
#:use-module (guix hash)
#:use-module (guix nar)
#:use-module (guix pk-crypto)
#:use-module (guix pki)
#:use-module (guix config)
#:use-module (guix base32)
#:use-module ((guix store) #:select (%store-prefix))
#:use-module ((guix build utils) #:select (delete-file-recursively))
#:use-module (rnrs bytevectors)
#:use-module (rnrs io ports)
#:use-module (web uri)
#:use-module (ice-9 regex)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-35)
#:use-module ((srfi srfi-64) #:hide (test-error)))
(define assert-valid-signature
;; (guix scripts substitute-binary) does not export this function in order to
;; avoid misuse.
(@@ (guix scripts substitute-binary) assert-valid-signature))
;;; XXX: Replace with 'test-error' from SRFI-64 as soon as it allow us to
;;; catch specific exceptions.
(define-syntax-rule (test-error* name exp)
(test-equal name
1
(catch 'quit
(lambda ()
exp
#f)
(lambda (key value)
value))))
(define %public-key
;; This key is known to be in the ACL by default.
(call-with-input-file (string-append %config-directory "/signing-key.pub")
(compose string->canonical-sexp get-string-all)))
(define %private-key
(call-with-input-file (string-append %config-directory "/signing-key.sec")
(compose string->canonical-sexp get-string-all)))
(define* (signature-body bv #:key (public-key %public-key))
"Return the signature of BV as the base64-encoded body of a narinfo's
'Signature' field."
(base64-encode
(string->utf8
(canonical-sexp->string
(signature-sexp (bytevector->hash-data (sha256 bv)
#:key-type 'rsa)
%private-key
public-key)))))
(define %wrong-public-key
(string->canonical-sexp "(public-key
(rsa
(n #00E05873AC2B168760343145918E954EE9AB73C026355693B192E01EE835261AA689E9EF46642E895BCD65C648524059FC450E4BA77A68F4C52D0E39EF0CC9359709AB6AAB153B63782201871325B0FDA19CB401CD99FD0C31A91CA9000AA90A77E82B89E036FB63BC1D3961207469B3B12468977148D376F8012BB12A4B11A8F1#)
(e #010001#)
)
)"))
(define* (signature-field bv-or-str
#:key (version "1") (public-key %public-key))
"Return the 'Signature' field value of bytevector/string BV-OR-STR, using
PUBLIC-KEY as the signature's principal, and using VERSION as the signature
version identifier.."
(string-append version ";example.gnu.org;"
(signature-body (if (string? bv-or-str)
(string->utf8 bv-or-str)
bv-or-str)
#:public-key public-key)))
(test-begin "substitute-binary")
(test-error* "not a number"
(narinfo-signature->canonical-sexp
(signature-field "foo" #:version "not a number")))
(test-error* "wrong version number"
(narinfo-signature->canonical-sexp
(signature-field "foo" #:version "2")))
(test-assert "valid narinfo-signature->canonical-sexp"
(canonical-sexp? (narinfo-signature->canonical-sexp (signature-field "foo"))))
(define-syntax-rule (test-error-condition name pred message-rx exp)
(test-assert name
(guard (condition ((pred condition)
(and (string-match message-rx
(condition-message condition))
#t))
(else #f))
exp
#f)))
(test-error-condition "corrupt signature data"
nar-signature-error? "corrupt"
(assert-valid-signature (string->canonical-sexp "(foo bar baz)") "irrelevant"
(open-input-string "irrelevant")
(public-keys->acl (list %public-key))))
(test-error-condition "unauthorized public key"
nar-signature-error? "unauthorized"
(assert-valid-signature (narinfo-signature->canonical-sexp
(signature-field "foo"))
"irrelevant"
(open-input-string "irrelevant")
(public-keys->acl '())))
(test-error-condition "invalid signature"
nar-signature-error? "invalid signature"
(let ((message "this is the message that we sign"))
(assert-valid-signature (narinfo-signature->canonical-sexp
(signature-field message
#:public-key %wrong-public-key))
(sha256 (string->utf8 message))
(open-input-string "irrelevant")
(public-keys->acl (list %wrong-public-key)))))
(define %narinfo
;; Skeleton of the narinfo used below.
(string-append "StorePath: " (%store-prefix)
"/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo
URL: example.nar
Compression: none
NarHash: sha256:" (bytevector->nix-base32-string
(sha256 (string->utf8 "Substitutable data."))) "
NarSize: 42
References: bar baz
Deriver: " (%store-prefix) "/foo.drv
System: mips64el-linux\n"))
(define (call-with-narinfo narinfo thunk)
"Call THUNK in a context where $GUIX_BINARY_SUBSTITUTE_URL is populated with
a file for NARINFO."
(let ((narinfo-directory (and=> (string->uri (getenv
"GUIX_BINARY_SUBSTITUTE_URL"))
uri-path))
(cache-directory (string-append (getenv "XDG_CACHE_HOME")
"/guix/substitute-binary/")))
(dynamic-wind
(lambda ()
(when (file-exists? cache-directory)
(delete-file-recursively cache-directory))
(call-with-output-file (string-append narinfo-directory
"/nix-cache-info")
(lambda (port)
(format port "StoreDir: ~a\nWantMassQuery: 0\n"
(%store-prefix))))
(call-with-output-file (string-append narinfo-directory "/"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
".narinfo")
(cut display narinfo <>))
;; Prepare the nar.
(call-with-output-file
(string-append narinfo-directory "/example.out")
(cut display "Substitutable data." <>))
(call-with-output-file
(string-append narinfo-directory "/example.nar")
(cute write-file
(string-append narinfo-directory "/example.out") <>))
(set! (@@ (guix scripts substitute-binary)
%allow-unauthenticated-substitutes?)
#f))
thunk
(lambda ()
(delete-file-recursively cache-directory)))))
(define-syntax-rule (with-narinfo narinfo body ...)
(call-with-narinfo narinfo (lambda () body ...)))
(test-equal "query narinfo without signature"
"" ; not substitutable
(with-narinfo %narinfo
(string-trim-both
(with-output-to-string
(lambda ()
(with-input-from-string (string-append "have " (%store-prefix)
"/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo")
(lambda ()
(guix-substitute-binary "--query"))))))))
(test-equal "query narinfo with invalid hash"
;; The hash in the signature differs from the hash of %NARINFO.
""
(with-narinfo (string-append %narinfo "Signature: "
(signature-field "different body")
"\n")
(string-trim-both
(with-output-to-string
(lambda ()
(with-input-from-string (string-append "have " (%store-prefix)
"/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo")
(lambda ()
(guix-substitute-binary "--query"))))))))
(test-equal "query narinfo signed with authorized key"
(string-append (%store-prefix) "/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo")
(with-narinfo (string-append %narinfo "Signature: "
(signature-field %narinfo)
"\n")
(string-trim-both
(with-output-to-string
(lambda ()
(with-input-from-string (string-append "have " (%store-prefix)
"/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo")
(lambda ()
(guix-substitute-binary "--query"))))))))
(test-equal "query narinfo signed with unauthorized key"
"" ; not substitutable
(with-narinfo (string-append %narinfo "Signature: "
(signature-field
%narinfo
#:public-key %wrong-public-key)
"\n")
(string-trim-both
(with-output-to-string
(lambda ()
(with-input-from-string (string-append "have " (%store-prefix)
"/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo")
(lambda ()
(guix-substitute-binary "--query"))))))))
(test-error* "substitute, no signature"
(with-narinfo %narinfo
(guix-substitute-binary "--substitute"
(string-append (%store-prefix)
"/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo")
"foo")))
(test-error* "substitute, invalid hash"
;; The hash in the signature differs from the hash of %NARINFO.
(with-narinfo (string-append %narinfo "Signature: "
(signature-field "different body")
"\n")
(guix-substitute-binary "--substitute"
(string-append (%store-prefix)
"/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo")
"foo")))
(test-error* "substitute, unauthorized key"
(with-narinfo (string-append %narinfo "Signature: "
(signature-field
%narinfo
#:public-key %wrong-public-key)
"\n")
(guix-substitute-binary "--substitute"
(string-append (%store-prefix)
"/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo")
"foo")))
(test-equal "substitute, authorized key"
"Substitutable data."
(with-narinfo (string-append %narinfo "Signature: "
(signature-field %narinfo))
(dynamic-wind
(const #t)
(lambda ()
(guix-substitute-binary "--substitute"
(string-append (%store-prefix)
"/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo")
"substitute-retrieved")
(call-with-input-file "substitute-retrieved" get-string-all))
(lambda ()
(false-if-exception (delete-file "substitute-retrieved"))))))
(test-end "substitute-binary")
(exit (= (test-runner-fail-count (test-runner-current)) 0))
;;; Local Variables:
;;; eval: (put 'with-narinfo 'scheme-indent-function 1)
;;; eval: (put 'test-error-condition 'scheme-indent-function 3)
;;; eval: (put 'test-error* 'scheme-indent-function 1)
;;; End: