guix/tests/pk-crypto.scm
Ludovic Courtès 6f69588529 authenticate: Allow signatures with binary data to be written to stdout.
Fixes <http://bugs.gnu.org/17312>.

* guix/scripts/authenticate.scm (guix-authenticate): Add calls to
  'set-port-encoding!' and 'set-port-conversion-strategy!'.  Wrap body
  in 'with-fluids' form that sets '%default-port-encoding' and
  '%default-port-conversion-strategy'.
* tests/guix-authenticate.sh: Add test.
* tests/pk-crypto.scm ("hash corrupt due to restrictive locale
  encoding"): Add reference to bug.
2014-04-22 11:30:58 +02:00

293 lines
11 KiB
Scheme
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 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-pk-crypto)
#:use-module (guix pk-crypto)
#:use-module (guix utils)
#:use-module (guix hash)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-64)
#:use-module (rnrs bytevectors)
#:use-module (rnrs io ports)
#:use-module (ice-9 match))
;; Test the (guix pk-crypto) module.
(define %key-pair
;; RSA key pair that was generated with:
;; (generate-key (string->canonical-sexp "(genkey (rsa (nbits 4:1024)))"))
;; which takes a bit of time.
"(key-data
(public-key
(rsa
(n #00C1F764069F54FFE93A126B02328903E984E4AE3AF6DF402B5B6B3907911B88C385F1BA76A002EC9DEA109A5228EF0E62EE31A06D1A5861CAB474F6C857AC66EB65A1905F25BBA1869579E73A3B7FED13AF5A1667326F88CDFC2FF24B03C14FD1384AA7E73CA89572880B606E3A974E15347963FC7B6378574936A47580DBCB45#)
(e #010001#)))
(private-key
(rsa
(n #00C1F764069F54FFE93A126B02328903E984E4AE3AF6DF402B5B6B3907911B88C385F1BA76A002EC9DEA109A5228EF0E62EE31A06D1A5861CAB474F6C857AC66EB65A1905F25BBA1869579E73A3B7FED13AF5A1667326F88CDFC2FF24B03C14FD1384AA7E73CA89572880B606E3A974E15347963FC7B6378574936A47580DBCB45#)
(e #010001#)
(d #58CAD84653D0046A8EC3F9AA82D9C829B145422109FC3F12DA01A694B92FA296E70D366FB166454D30E632CEE3A033B4C41781BA10325F69FCDC0250CA19C8EEB352FA085992494098DB133E682ED38A931701F0DED1A1E508F4341A4FB446A04F019427C7CB3C44F251EEA9D386100DA80F125E0FD5CE1B0DFEC6D21516EACD#)
(p #00D47F185147EC39393CCDA4E7323FFC20FC8B8073E2A54DD63BA392A66975E4204CA48572496A9DFD7522436B852C07472A5AB25B7706F7C14E6F33FBC420FF3B#)
(q #00E9AD22F158060BC9AE3601DA623AFC60FFF3058795802CA92371C00097335CF9A23D7782DE353C9DBA93D7BB99E6A24A411107605E722481C5C191F80D7EB77F#)
(u #59B45B95AE01A7A7370FAFDB08FE73A4793CE37F228961B09B1B1E7DDAD9F8D3E28F5C5E8B4B067E6B8E0BBF3F690B42991A79E46108DDCDA2514323A66964DE#))))")
(define %ecc-key-pair
;; Ed25519 key pair generated with:
;; (generate-key (string->canonical-sexp "(genkey (ecdsa (curve Ed25519) (flags rfc6979 transient)))"))
"(key-data
(public-key
(ecc
(curve Ed25519)
(q #94869C1B9E69DB8DD910B7F7F4D6E56A63A964A59AE8F90F6703ACDDF6F50C81#)))
(private-key
(ecc
(curve Ed25519)
(q #94869C1B9E69DB8DD910B7F7F4D6E56A63A964A59AE8F90F6703ACDDF6F50C81#)
(d #6EFB32D0B4EC6B3237B523539F1979379B82726AAA605EB2FBA6775B2B777B78#))))")
(test-begin "pk-crypto")
(test-assert "version"
(gcrypt-version))
(let ((sexps '("(foo bar)"
;; In Libgcrypt 1.5.3 the following integer is rendered as
;; binary, whereas in 1.6.0 it's rendered as is (hexadecimal.)
;;"#C0FFEE#"
"(genkey \n (rsa \n (nbits \"1024\")\n )\n )")))
(test-equal "string->canonical-sexp->string"
sexps
(let ((sexps (map string->canonical-sexp sexps)))
(and (every canonical-sexp? sexps)
(map (compose string-trim-both canonical-sexp->string) sexps)))))
(gc) ; stress test!
(let ((sexps `(("(foo bar)" foo -> "(foo bar)")
("(foo (bar (baz 3:123)))" baz -> "(baz \"123\")")
("(foo (bar 3:123))" baz -> #f))))
(test-equal "find-sexp-token"
(map (match-lambda
((_ _ '-> expected)
expected))
sexps)
(map (match-lambda
((input token '-> _)
(let ((sexp (find-sexp-token (string->canonical-sexp input) token)))
(and sexp
(string-trim-both (canonical-sexp->string sexp))))))
sexps)))
(gc)
(test-equal "canonical-sexp-length"
'(0 1 2 4 0 0)
(map (compose canonical-sexp-length string->canonical-sexp)
'("()" "(a)" "(a b)" "(a #616263# b #C001#)" "a" "#123456#")))
(test-equal "canonical-sexp-list?"
'(#t #f #t #f)
(map (compose canonical-sexp-list? string->canonical-sexp)
'("()" "\"abc\"" "(a b c)" "#123456#")))
(gc)
(test-equal "canonical-sexp-car + cdr"
'("(b \n (c xyz)\n )")
(let ((lst (string->canonical-sexp "(a (b (c xyz)))")))
(map (lambda (sexp)
(and sexp (string-trim-both (canonical-sexp->string sexp))))
;; Note: 'car' returns #f when the first element is an atom.
(list (canonical-sexp-car (canonical-sexp-cdr lst))))))
(gc)
(test-equal "canonical-sexp-nth"
'("(b pqr)" "(c \"456\")" "(d xyz)" #f #f)
(let ((lst (string->canonical-sexp "(a (b 3:pqr) (c 3:456) (d 3:xyz))")))
;; XXX: In Libgcrypt 1.5.3, (canonical-sexp-nth lst 0) returns LST, whereas in
;; 1.6.0 it returns #f.
(map (lambda (sexp)
(and sexp (string-trim-both (canonical-sexp->string sexp))))
(unfold (cut > <> 5)
(cut canonical-sexp-nth lst <>)
1+
1))))
(gc)
(test-equal "canonical-sexp-nth-data"
`(Name Otto Meier #f ,(base16-string->bytevector "123456") #f)
(let ((lst (string->canonical-sexp
"(Name Otto Meier (address Burgplatz) #123456#)")))
(unfold (cut > <> 5)
(cut canonical-sexp-nth-data lst <>)
1+
0)))
(let ((bv (base16-string->bytevector
"5eff0b55c9c5f5e87b4e34cd60a2d5654ca1eb78c7b3c67c3179fed1cff07b4c")))
(test-equal "hash corrupt due to restrictive locale encoding"
bv
;; In Guix up to 0.6 included this test would fail because at some point
;; the hash value would be cropped to ASCII. In practice 'guix
;; authenticate' would produce invalid signatures that would fail
;; signature verification. See <http://bugs.gnu.org/17312>.
(let ((locale (setlocale LC_ALL)))
(dynamic-wind
(lambda ()
(setlocale LC_ALL "C"))
(lambda ()
(hash-data->bytevector
(string->canonical-sexp
(canonical-sexp->string
(bytevector->hash-data bv "sha256")))))
(lambda ()
(setlocale LC_ALL locale))))))
(gc)
;; XXX: The test below is typically too long as it needs to gather enough entropy.
;; (test-assert "generate-key"
;; (let ((key (generate-key (string->canonical-sexp
;; "(genkey (rsa (nbits 3:128)))"))))
;; (and (canonical-sexp? key)
;; (find-sexp-token key 'key-data)
;; (find-sexp-token key 'public-key)
;; (find-sexp-token key 'private-key))))
(test-assert "bytevector->hash-data->bytevector"
(let* ((bv (sha256 (string->utf8 "Hello, world.")))
(data (bytevector->hash-data bv "sha256")))
(and (canonical-sexp? data)
(let-values (((value algo) (hash-data->bytevector data)))
(and (string=? algo "sha256")
(bytevector=? value bv))))))
(test-equal "key-type"
'(rsa ecc)
(map (compose key-type
(cut find-sexp-token <> 'public-key)
string->canonical-sexp)
(list %key-pair %ecc-key-pair)))
(test-assert "sign + verify"
(let* ((pair (string->canonical-sexp %key-pair))
(secret (find-sexp-token pair 'private-key))
(public (find-sexp-token pair 'public-key))
(data (bytevector->hash-data
(sha256 (string->utf8 "Hello, world."))
#:key-type (key-type public)))
(sig (sign data secret)))
(and (verify sig data public)
(not (verify sig
(bytevector->hash-data
(sha256 (string->utf8 "Hi!"))
#:key-type (key-type public))
public)))))
;; Ed25519 appeared in libgcrypt 1.6.0.
(test-skip (if (version>? (gcrypt-version) "1.6.0") 0 1))
(test-assert "sign + verify, Ed25519"
(let* ((pair (string->canonical-sexp %ecc-key-pair))
(secret (find-sexp-token pair 'private-key))
(public (find-sexp-token pair 'public-key))
(data (bytevector->hash-data
(sha256 (string->utf8 "Hello, world."))))
(sig (sign data secret)))
(and (verify sig data public)
(not (verify sig
(bytevector->hash-data
(sha256 (string->utf8 "Hi!")))
public)))))
(gc)
(test-equal "canonical-sexp->sexp"
`((data
(flags pkcs1)
(hash sha256
,(base16-string->bytevector
"2749f0ea9f26c6c7be746a9cff8fa4c2f2a02b000070dba78429e9a11f87c6eb")))
(public-key
(rsa
(n ,(base16-string->bytevector
(string-downcase
"00C1F764069F54FFE93A126B02328903E984E4AE3AF6DF402B5B6B3907911B88C385F1BA76A002EC9DEA109A5228EF0E62EE31A06D1A5861CAB474F6C857AC66EB65A1905F25BBA1869579E73A3B7FED13AF5A1667326F88CDFC2FF24B03C14FD1384AA7E73CA89572880B606E3A974E15347963FC7B6378574936A47580DBCB45")))
(e ,(base16-string->bytevector
"010001")))))
(list (canonical-sexp->sexp
(string->canonical-sexp
"(data
(flags pkcs1)
(hash \"sha256\"
#2749f0ea9f26c6c7be746a9cff8fa4c2f2a02b000070dba78429e9a11f87c6eb#))"))
(canonical-sexp->sexp
(find-sexp-token (string->canonical-sexp %key-pair)
'public-key))))
(let ((lst
`((data
(flags pkcs1)
(hash sha256
,(base16-string->bytevector
"2749f0ea9f26c6c7be746a9cff8fa4c2f2a02b000070dba78429e9a11f87c6eb")))
(public-key
(rsa
(n ,(base16-string->bytevector
(string-downcase
"00C1F764069F54FFE93A126B02328903E984E4AE3AF6DF402B5B6B3907911B88C385F1BA76A002EC9DEA109A5228EF0E62EE31A06D1A5861CAB474F6C857AC66EB65A1905F25BBA1869579E73A3B7FED13AF5A1667326F88CDFC2FF24B03C14FD1384AA7E73CA89572880B606E3A974E15347963FC7B6378574936A47580DBCB45")))
(e ,(base16-string->bytevector
"010001"))))
,(base16-string->bytevector
"2749f0ea9f26c6c7be746a9cff8fa4c2f2a02b000070dba78429e9a11f87c6eb"))))
(test-equal "sexp->canonical-sexp->sexp"
lst
(map (compose canonical-sexp->sexp sexp->canonical-sexp)
lst)))
(let ((sexp `(signature
(public-key
(rsa
(n ,(make-bytevector 1024 1))
(e ,(base16-string->bytevector "010001")))))))
(test-equal "https://bugs.g10code.com/gnupg/issue1594"
;; The gcrypt bug above was primarily affecting our uses in
;; 'canonical-sexp->sexp', typically when applied to a signature sexp (in
;; 'guix authenticate -verify') with a "big" RSA key, such as 4096 bits.
sexp
(canonical-sexp->sexp (sexp->canonical-sexp sexp))))
(test-end)
(exit (= (test-runner-fail-count (test-runner-current)) 0))