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
290
291
292
293
294
295
296
|
;;; gnutls-tests.el --- Test suite for gnutls.el -*- lexical-binding:t -*-
;; Copyright (C) 2017-2020 Free Software Foundation, Inc.
;; Author: Ted Zlatanov <tzz@lifelogs.com>
;; This file is part of GNU Emacs.
;; GNU Emacs 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 Emacs 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 Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Run this with `GNUTLS_TEST_VERBOSE=1' to get verbose debugging.
;;; Code:
(require 'ert)
(require 'cl-lib)
(require 'gnutls)
(require 'hex-util)
(defvar gnutls-tests-message-prefix "")
(defsubst gnutls-tests-message (format-string &rest args)
(when (getenv "GNUTLS_TEST_VERBOSE")
(apply #'message (concat "gnutls-tests: " gnutls-tests-message-prefix format-string) args)))
;; Minor convenience to see strings more easily (without binary data).
(defsubst gnutls-tests-hexstring-equal (a b)
(and (stringp a) (stringp b) (string-equal (encode-hex-string a) (encode-hex-string b))))
(defvar gnutls-tests-internal-macs-upcased
(mapcar (lambda (sym) (cons sym (intern (upcase (symbol-name sym)))))
(secure-hash-algorithms)))
(defvar gnutls-tests-tested-macs
(when (gnutls-available-p)
(cl-remove-duplicates
(append (mapcar #'cdr gnutls-tests-internal-macs-upcased)
(mapcar #'car (gnutls-macs))))))
(defvar gnutls-tests-tested-digests
(when (gnutls-available-p)
(cl-remove-duplicates
(append (mapcar #'cdr gnutls-tests-internal-macs-upcased)
(mapcar #'car (gnutls-digests))))))
(defvar gnutls-tests-tested-ciphers
(when (gnutls-available-p)
(cl-remove-duplicates
;; these cause FPEs or SEGVs
(cl-remove-if (lambda (e) (memq e '(ARCFOUR-128)))
(mapcar #'car (gnutls-ciphers))))))
(defvar gnutls-tests-mondo-strings
(list
""
"some data"
"lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data lots and lots of data "
"data and more data to go over the block limit!"
"data and more data to go over the block limit"
(format "some random data %d%d" (random) (random))))
(ert-deftest test-gnutls-000-availability ()
"Test the GnuTLS hashes and ciphers availability."
(skip-unless (memq 'gnutls3 (gnutls-available-p)))
(setq gnutls-tests-message-prefix "availability: ")
(should (> (length gnutls-tests-internal-macs-upcased) 5))
(let ((macs (gnutls-macs))
(digests (gnutls-digests))
(ciphers (gnutls-ciphers)))
(dolist (mac gnutls-tests-tested-macs)
(let ((plist (cdr (assq mac macs))))
(gnutls-tests-message "MAC %s %S" mac plist)
(dolist (prop '(:mac-algorithm-id :mac-algorithm-length :mac-algorithm-keysize :mac-algorithm-noncesize))
(should (plist-get plist prop)))
(should (eq 'gnutls-mac-algorithm (plist-get plist :type)))))
(dolist (digest gnutls-tests-tested-digests)
(let ((plist (cdr (assq digest digests))))
(gnutls-tests-message "digest %s %S" digest plist)
(dolist (prop '(:digest-algorithm-id :digest-algorithm-length))
(should (plist-get plist prop)))
(should (eq 'gnutls-digest-algorithm (plist-get plist :type)))))
(dolist (cipher gnutls-tests-tested-ciphers)
(let ((plist (cdr (assq cipher ciphers))))
(gnutls-tests-message "cipher %s %S" cipher plist)
(dolist (prop '(:cipher-id :cipher-blocksize :cipher-keysize :cipher-ivsize))
(should (plist-get plist prop)))
(should (eq 'gnutls-symmetric-cipher (plist-get plist :type)))))))
(ert-deftest test-gnutls-000-data-extractions ()
"Test the GnuTLS data extractions against the built-in `secure-hash'."
(skip-unless (memq 'digests (gnutls-available-p)))
(setq gnutls-tests-message-prefix "data extraction: ")
(dolist (input gnutls-tests-mondo-strings)
;; Test buffer extraction
(with-temp-buffer
(insert input)
(insert "not ASCII: не e английски")
(dolist (step '(0 1 2 3 4 5))
(let ((spec (list (current-buffer) ; a buffer spec
(point-min)
(max (point-min) (- step (point-max)))))
(spec2 (list (buffer-string) ; a string spec
(point-min)
(max (point-min) (- step (point-max))))))
(should (gnutls-tests-hexstring-equal
(gnutls-hash-digest 'MD5 spec)
(apply 'secure-hash 'md5 (append spec '(t)))))
(should (gnutls-tests-hexstring-equal
(gnutls-hash-digest 'MD5 spec2)
(apply 'secure-hash 'md5 (append spec2 '(t))))))))))
(ert-deftest test-gnutls-001-hashes-internal-digests ()
"Test the GnuTLS hash digests against the built-in `secure-hash'."
(skip-unless (memq 'digests (gnutls-available-p)))
(setq gnutls-tests-message-prefix "digest internal verification: ")
(let ((macs (gnutls-macs)))
(dolist (mcell gnutls-tests-internal-macs-upcased)
(let ((plist (cdr (assq (cdr mcell) macs))))
(gnutls-tests-message "Checking digest MAC %S %S" mcell plist)
(dolist (input gnutls-tests-mondo-strings)
;; Test buffer extraction
(with-temp-buffer
(insert input)
(should (gnutls-tests-hexstring-equal
(gnutls-hash-digest (cdr mcell) (current-buffer))
(secure-hash (car mcell) (current-buffer) nil nil t))))
(should (gnutls-tests-hexstring-equal
(gnutls-hash-digest (cdr mcell) input)
(secure-hash (car mcell) input nil nil t))))))))
(ert-deftest test-gnutls-002-hashes-digests ()
"Test some GnuTLS hash digests against pre-defined outputs."
(skip-unless (memq 'digests (gnutls-available-p)))
(setq gnutls-tests-message-prefix "digest external verification: ")
(let ((macs (gnutls-macs)))
(dolist (test '(("57edf4a22be3c955ac49da2e2107b67a" "12345678901234567890123456789012345678901234567890123456789012345678901234567890" MD5)
("d174ab98d277d9f5a5611c2c9f419d9f" "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" MD5)
("c3fcd3d76192e4007dfb496cca67e13b" "abcdefghijklmnopqrstuvwxyz" MD5)
("f96b697d7cb7938d525a2f31aaf161d0" "message digest" MD5)
("900150983cd24fb0d6963f7d28e17f72" "abc" MD5)
("0cc175b9c0f1b6a831c399e269772661" "a" MD5)
("a9993e364706816aba3e25717850c26c9cd0d89d" "abc" SHA1)
("a9993e364706816aba3e25717850c26c9cd0d89d" "abc" "SHA1"))) ; check string ID for digest
(pcase-let ((`(,hash ,input ,mac) test))
(let ((plist (cdr (assq mac macs)))
result resultb)
(gnutls-tests-message "%s %S" mac plist)
(setq result (encode-hex-string (gnutls-hash-digest mac input)))
(gnutls-tests-message "%S => result %S" test result)
(should (string-equal result hash))
;; Test buffer extraction
(with-temp-buffer
(insert input)
(setq resultb (encode-hex-string (gnutls-hash-digest mac (current-buffer))))
(gnutls-tests-message "%S => result from buffer %S" test resultb)
(should (string-equal resultb hash))))))))
(ert-deftest test-gnutls-003-hashes-hmacs ()
"Test some predefined GnuTLS HMAC outputs for SHA256."
(skip-unless (memq 'macs (gnutls-available-p)))
(setq gnutls-tests-message-prefix "HMAC verification: ")
(let ((macs (gnutls-macs)))
(dolist (test '(("f5c5021e60d9686fef3bb0414275fe4163bece61d9a95fec7a273746a437b986" "hello\n" "test" SHA256)
("46b75292b81002fd873e89c532a1b8545d6efc9822ee938feba6de2723161a67" "more and more data goes into a file to exceed the buffer size" "test" SHA256)
("81568ba71fa2c5f33cc84bf362466988f98eba3735479100b4e8908acad87ac4" "more and more data goes into a file to exceed the buffer size" "very long key goes here to exceed the key size" SHA256)
("4bc830005783a73b8112f4bd5f4aa5f92e05b51e9b55c0cd6f9a7bee48371def" "more and more data goes into a file to exceed the buffer size" "" "SHA256") ; check string ID for HMAC
("4bc830005783a73b8112f4bd5f4aa5f92e05b51e9b55c0cd6f9a7bee48371def" "more and more data goes into a file to exceed the buffer size" "" SHA256)))
(pcase-let ((`(,hash ,input ,key ,mac) test))
(let ((plist (cdr (assq mac macs)))
result)
(gnutls-tests-message "%s %S" mac plist)
(setq result (encode-hex-string (gnutls-hash-mac mac (copy-sequence key) input)))
(gnutls-tests-message "%S => result %S" test result)
(should (string-equal result hash)))))))
(defun gnutls-tests-pad-or-trim (s exact)
"Pad or trim string S to EXACT numeric size."
(if (and (consp s) (eq 'iv-auto (nth 0 s)))
s
(let ((e (number-to-string exact)))
(format (concat "%" e "." e "s") s))))
(defun gnutls-tests-pad-to-multiple (s blocksize)
"Pad string S to BLOCKSIZE numeric size."
(let* ((e (if (string= s "")
blocksize
(* blocksize (ceiling (length s) blocksize))))
(out (concat s (make-string (- e (length s)) ? ))))
;; (gnutls-tests-message "padding %S to length %d for blocksize %d: => %S" s e blocksize out)
out))
;; ;;; Testing from the command line:
;; ;;; echo e36a9d13c15a6df23a59a6337d6132b8f7cd5283cb4784b81141b52343a18e5f5e5ee8f5553c23167409dd222478bc30 | perl -lne 'print pack "H*", $_' | openssl enc -aes-128-ctr -d -nosalt -K 6d796b657932 -iv 696e697432 | od -x
(ert-deftest test-gnutls-004-symmetric-ciphers ()
"Test the GnuTLS symmetric ciphers"
(skip-unless (memq 'ciphers (gnutls-available-p)))
(setq gnutls-tests-message-prefix "symmetric cipher verification: ")
;; we expect at least 10 ciphers
(should (> (length (gnutls-ciphers)) 10))
(let ((keys '("mykey" "mykey2"))
(inputs gnutls-tests-mondo-strings)
(ivs '("" "-abc123-" "init" "ini2"))
(ciphers (cl-remove-if
(lambda (c) (plist-get (cdr (assq c (gnutls-ciphers)))
:cipher-aead-capable))
gnutls-tests-tested-ciphers)))
(dolist (cipher ciphers)
(dolist (iv ivs)
(dolist (input inputs)
(dolist (key keys)
(gnutls-tests-message "%S, starting key %S IV %S input %S" (assq cipher (gnutls-ciphers)) key iv input)
(let* ((cplist (cdr (assq cipher (gnutls-ciphers))))
(key (gnutls-tests-pad-or-trim key (plist-get cplist :cipher-keysize)))
(input (gnutls-tests-pad-to-multiple input (plist-get cplist :cipher-blocksize)))
(iv (gnutls-tests-pad-or-trim iv (plist-get cplist :cipher-ivsize)))
(output (gnutls-symmetric-encrypt cplist (copy-sequence key) iv input))
(data (nth 0 output))
(actual-iv (nth 1 output))
(reverse-output (gnutls-symmetric-decrypt cplist (copy-sequence key) actual-iv data))
(reverse (nth 0 reverse-output)))
(gnutls-tests-message "%s %S" cipher cplist)
(gnutls-tests-message "key %S IV %S input %S => hexdata %S and reverse %S" key iv input (encode-hex-string data) reverse)
(should-not (gnutls-tests-hexstring-equal input data))
(should-not (gnutls-tests-hexstring-equal data reverse))
(should (gnutls-tests-hexstring-equal input reverse)))))))))
(ert-deftest test-gnutls-005-aead-ciphers ()
"Test the GnuTLS AEAD ciphers"
:tags '(:expensive-test)
(skip-unless (memq 'AEAD-ciphers (gnutls-available-p)))
(setq gnutls-tests-message-prefix "AEAD verification: ")
(let ((keys '("mykey" "mykey2"))
(inputs gnutls-tests-mondo-strings)
(ivs '("" "-abc123-" "init" "ini2"))
(auths '(nil
""
"auth data"
"auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data auth and auth of data "
"AUTH data and more data to go over the block limit!"
"AUTH data and more data to go over the block limit"))
(ciphers (cl-remove-if
(lambda (c) (or (null (plist-get (cdr (assq c (gnutls-ciphers)))
:cipher-aead-capable))))
gnutls-tests-tested-ciphers))
actual-ivlist)
(dolist (cipher ciphers)
(dolist (input inputs)
(dolist (auth auths)
(dolist (key keys)
(let* ((cplist (cdr (assq cipher (gnutls-ciphers))))
(key (gnutls-tests-pad-or-trim key (plist-get cplist :cipher-keysize)))
(input (gnutls-tests-pad-to-multiple input (plist-get cplist :cipher-blocksize)))
(ivsize (plist-get cplist :cipher-ivsize)))
(should (>= ivsize 12)) ; as per the RFC
(dolist (iv (append ivs (list (list 'iv-auto ivsize))))
(gnutls-tests-message "%S, starting key %S IV %S input %S auth %S" (assq cipher (gnutls-ciphers)) key iv input auth)
(let* ((iv (gnutls-tests-pad-or-trim iv (plist-get cplist :cipher-ivsize)))
(output (gnutls-symmetric-encrypt cplist (copy-sequence key) iv input (copy-sequence auth)))
(data (nth 0 output))
(actual-iv (nth 1 output))
(reverse-output (gnutls-symmetric-decrypt cplist (copy-sequence key) actual-iv data auth))
(reverse (nth 0 reverse-output)))
;; GNUTLS_RND_NONCE should be good enough to ensure this.
(should-not (member (secure-hash 'sha384 actual-iv 0 ivsize) actual-ivlist))
(cond
((stringp iv)
(should (equal iv actual-iv)))
((consp iv)
(push (secure-hash 'sha384 actual-iv 0 ivsize) actual-ivlist)
(gnutls-tests-message "IV list length: %d" (length actual-ivlist))))
(gnutls-tests-message "%s %S" cipher cplist)
(gnutls-tests-message "key %S IV %S input %S auth %S => hexdata %S and reverse %S" key iv input auth (encode-hex-string data) reverse)
(should-not (gnutls-tests-hexstring-equal input data))
(should-not (gnutls-tests-hexstring-equal data reverse))
(should (gnutls-tests-hexstring-equal input reverse)))))))))))
(provide 'gnutls-tests)
;;; gnutls-tests.el ends here
|
