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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 (rnrs bytevectors)
#:use-module (srfi srfi-34)
#: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-assert name
(catch 'quit
(lambda ()
exp
#f)
(const #t))))
(define %keypair
;; (display (canonical-sexp->string
;; (generate-key "(genkey (rsa (nbits 4:1024)))")))
(string->canonical-sexp
"(key-data
(public-key
(rsa
(n #00D74A00F16DD109A8E773291856A4EF9EE2C2D975E0BC207EA24245C9CFE39E32D8BA5442A2720A57E3A9D9E55E596A8B19CB2EF844E5E859362593914BD626433C887FB798AE87E1DA95D372DFC81E220B8802B04CEC818D9B6B4E2108817755AEBAC23D2FD2B0AB82A52FD785194F3C2D7B9327212588DB74D464EEE5DC9F5B#)
(e #010001#)
)
)
(private-key
(rsa
(n #00D74A00F16DD109A8E773291856A4EF9EE2C2D975E0BC207EA24245C9CFE39E32D8BA5442A2720A57E3A9D9E55E596A8B19CB2EF844E5E859362593914BD626433C887FB798AE87E1DA95D372DFC81E220B8802B04CEC818D9B6B4E2108817755AEBAC23D2FD2B0AB82A52FD785194F3C2D7B9327212588DB74D464EEE5DC9F5B#)
(e #010001#)
(d #40E6D963EF143E9241BC10DE7A785C988C89EB1EC33253A5796AFB38FCC804D015500EC8CBCA0F5E318EE9D660DC19E7774E2E89BFD38379297EA87EFBDAC24BA32EE5339215382B2C89F5A817FD9131CA8E8A0A70D58E26E847AD0C447053671A6B2D7746087DE058A02B17701752B8A36EB414435921615AE7CAA8AC48E451#)
(p #00EA88C0C19FE83C09285EF49FF88A1159357FD870031C20F15EF5103FBEB10925299BCA197F7143D6792A1BA7044EDA572EC94FA6B00889F9857216CF5B984403#)
(q #00EAFE541EE9E0531255A85CADBEF64D5F679766D7209F521ADD131CF4B7DA9DF5414901342A146EE84FAA1E35EE0D0F6CE3F5F25989C0D1E9FA5B678D78C113C9#)
(u #59C80FA2C48181F6855691C9D443619BA46C7648056E081697C370D8096E8EF165122D5E55F8FD6A2DCC404FA8BDCDC1FD20B4D76A433F25E8FD6901EC2DBDAD#)
)
)
)"))
(define %public-key
(find-sexp-token %keypair 'public-key))
(define %private-key
(find-sexp-token %keypair 'private-key))
(define (signature-body str)
(base64-encode
(string->utf8
(canonical-sexp->string
(signature-sexp (bytevector->hash-data (sha256 (string->utf8 str))
#:key-type 'rsa)
%private-key
%public-key)))))
(define %signature-body
(signature-body "secret"))
(define %wrong-public-key
(string->canonical-sexp "(public-key
(rsa
(n #00E05873AC2B168760343145918E954EE9AB73C026355693B192E01EE835261AA689E9EF46642E895BCD65C648524059FC450E4BA77A68F4C52D0E39EF0CC9359709AB6AAB153B63782201871325B0FDA19CB401CD99FD0C31A91CA9000AA90A77E82B89E036FB63BC1D3961207469B3B12468977148D376F8012BB12A4B11A8F1#)
(e #010001#)
)
)"))
(define %wrong-signature
(let* ((body (string->canonical-sexp
(utf8->string
(base64-decode %signature-body))))
(data (canonical-sexp->string (find-sexp-token body 'data)))
(sig-val (canonical-sexp->string (find-sexp-token body 'sig-val)))
(public-key (canonical-sexp->string %wrong-public-key))
(body* (base64-encode
(string->utf8
(string-append "(signature \n" data sig-val
public-key " )\n")))))
(string-append "1;irrelevant;" body*)))
(define* (signature str #:optional (body %signature-body))
(string-append str ";irrelevant;" body))
(define %signature
(signature "1" %signature-body))
(define %acl
(public-keys->acl (list %public-key)))
(test-begin "substitute-binary")
(test-error* "not a number"
(narinfo-signature->canonical-sexp (signature "not a number")))
(test-error* "wrong version number"
(narinfo-signature->canonical-sexp (signature "2")))
(test-assert "valid narinfo-signature->canonical-sexp"
(canonical-sexp? (narinfo-signature->canonical-sexp %signature)))
(define-syntax-rule (test-error-condition name pred exp)
(test-assert name
(guard (condition ((pred condition) (pk 'true condition #t))
(else #f))
exp
#f)))
;;; XXX: Do we need a better predicate hierarchy for these tests?
(test-error-condition "corrupt signature data"
nar-signature-error?
(assert-valid-signature "invalid sexp" "irrelevant"
(open-input-string "irrelevant")
%acl))
(test-error-condition "unauthorized public key"
nar-signature-error?
(assert-valid-signature (canonical-sexp->string
(narinfo-signature->canonical-sexp %signature))
"irrelevant"
(open-input-string "irrelevant")
(public-keys->acl '())))
(test-error-condition "invalid signature"
nar-signature-error?
(assert-valid-signature (canonical-sexp->string
(narinfo-signature->canonical-sexp
%wrong-signature))
(sha256 (string->utf8 "secret"))
(open-input-string "irrelevant")
(public-keys->acl (list %wrong-public-key))))
(define %narinfo
"StorePath: /nix/store/foo
URL: nar/foo
Compression: bzip2
NarHash: sha256:7
NarSize: 42
References: bar baz
Deriver: foo.drv
System: mips64el-linux\n")
(define (narinfo sig)
(format #f "~aSignature: ~a~%" %narinfo sig))
(define %signed-narinfo
(narinfo (signature "1" (signature-body %narinfo))))
(test-error-condition "invalid hash"
;; The hash of '%signature' is computed over the word "secret", not
;; '%narinfo'.
nar-invalid-hash-error?
(read-narinfo (open-input-string (narinfo %signature))
"https://example.com" %acl))
(test-assert "valid read-narinfo"
(read-narinfo (open-input-string %signed-narinfo)
"https://example.com" %acl))
(test-equal "valid write-narinfo"
%signed-narinfo
(call-with-output-string
(lambda (port)
(write-narinfo (read-narinfo (open-input-string %signed-narinfo)
"https://example.com" %acl)
port))))
(test-end "substitute-binary")
(exit (= (test-runner-fail-count (test-runner-current)) 0))
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