path: root/tests/pk-crypto.scm
blob: 5024a15a43ae854918c9422dd16d94690665bdad (about) (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
;;; 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)